GB2322374A

GB2322374A - Stabilizer mixture for organic materials

Info

Publication number: GB2322374A
Application number: GB9802277A
Authority: GB
Inventors: Christoph Kroehnke
Original assignee: Ciba Spezialitaetenchemie Holding AG; Ciba SC Holding AG
Current assignee: BASF Schweiz AG
Priority date: 1997-02-21
Filing date: 1998-02-04
Publication date: 1998-08-26
Anticipated expiration: 2018-02-04
Also published as: ITMI980307A1; DE19806846A1; IT1298273B1; KR19980071539A; KR100530090B1; JPH10236988A; GB2322374B; ES2138926A1; FR2760005A1; DE19806846B4; ES2138926B1; BE1011643A3; NL1008373A1; GB9802277D0; NL1008373C2; FR2760005B1

Abstract

Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type, at least one compound of the organic phosphite or phosphonite type, at least one compound of the phenolic antioxidant type and at least one compound of the sterically hindered amine type.

Description

Stabilizer mixture for omanic materials 2322374 The present invention

relates to compositions comprising an organic material subject to oxidative, thermal or light-induced degradation, and as stabilizers at least one compound of the benzofuran-2-one type, at least one compound of the phosphite or phosphonite type, at least one compound of the phenolic antioxidant type and at least one compound of the sterically hindered amine type, and to the use thereof for stabilizing organic materials against oxidative, thermal or light-induced degradation.

The use of compounds of the benzofuran-2-one type as stabilizers for organic polymers is known, for example, from US 4,325,863; US 4,388,244; US 5,175,312; US 5,252,643; US 5,216,052; US 5,369,159; US 5,488,117; US 5,356,966; US 5,367,008; US 5,428,162; US 5,428,177 or US 5,516,920.

Organic phosphites, phosphonites and phosphoramides are known in the art as costabilizers, secondary antioxidants and processing stabilizers, inter alia for polyolefins. Examples of such known phosphite stabilizers can be found in R. GAchter1H. Wilier (eds.), Plastics Additives Handbook, 3rd ed., page 47, Hanser, Munich 1990.

U.S. Patent 4,360,617 discloses that stabilizer mixtures comprising symmetrical triarylphosphites and certain phenolic antioxidants are particularly suitable for protecting certain organic materials, such as polyurethane, polyacrylonitrile, polyamide 12 or polystyrene, against oxidative, thermal or light-induced degradation.

Sterically hindered amines, including in particular compounds containing 2,2,6,6-tetram ethyl- piperidyl groups, are known as _hindered a-mine light stabilizers (HALS).

The known stabilizers do not satisfy in every respect the high requirements which a stabilizer is required to meet, especially with regard to shelf life, water absorption, sensitivity to hydrolysis, inprocess stabilization, colour properties, volatility, migration behaviour, compatibility and improvement in protection against light. As a result there continues to be a need for effective stabilizers for organic materials that are sensitive to oxidative, thermal and/or lightinduced degradation.

4h It has now been found that a stabilizer mixture comprising at least one compound of the benzofuran-2-one type, at least one compound of the organic phosphite or phosphonite type, at least one compound of the phenolic antioxidant type and at least one compound of the sterically hindered amine type is particularly suitable as a stabilizer for organic materials which are sensitive to oxidative, thermal or light-induced degradation.

The present invention therefore provides compositions comprising a) an organic material which is subject to oxidative, thermal or Ught-induced degradation, b) at least one compound of the benzofuran-2-one type, c) at least one compound from the group of the organic phosphites or phosphonites, d) at least one compound from the group of the phenolic antioxidants, and e) at least one compound from the group of the sterically hindered amines.

Compositions which are of interest include those comprising as component (b) a compound of the formula 1 0 0 R6 R 1 R3 R 5 R4 in which, if n is 1, - R, (1) J n R, is unsubstituted or Cl-CAlkyl-, Cl-CAlkoXY-, Cl-CAIWthio-, hydroxyi-, halo-, amino-, Cl-C4alkylamino-, phenylarnino- or di(Ci-C4alkyi)amino- substituted naphthyl, phenanthry], anthr, 5,6,7,8-tetrahydro-2-naphthyi, 5,6,7,8-tetrahydro-1 -naphthyi, thieny], benzo[blthienyi, naphtho[2,3- b]thienyi, thianthrenyl, dibenzofury], chromenyl, xanthenyl, phenoxathiinyi, pyrrolyl, imidazolyl, pyrazoly], pyraziny], pyrimidinyl, pyridazinyl, indoliziny], isoindolyl, indoly], indazolyi, puriny], quinolizinyl, isoquinolyi, quinolyi, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, pteridinyl, carbazolyl, P- carbolinyl, phenanthridinyl, acridinyl, perimidinyl, phenanthroliny], phenazinyl, isothiazolyl, phenothiazinyl, isoxazolyl, furazanyl, biphenyl, terphenyl, fluorenyl or phenoxaziny], or R, is a radical of the formula 11 9 #7' R,, Rio 1 R R8 (11) and if n is 2, R, is unsubstituted orCI-C4a]kyi- or hydroxyl-substituted phenylene or naphthylene; or is -R12-X-R13-, R2, R3, R4and R5 independently of one another are hydrogen, chlorine, hydroxyl, Cl-CMalky], C7-C9phenylalky], unsubstituted or Cl-C4alkyl- substituted phenyl; unsubstituted or Cl-CAlkylsubstituted C5-Cacycloalkyl; Cl-Clealkoxy, Cl-CI8alkylthio, Cl-C4a1Warnino, di(C1-C4a[kyi)amino, Cl- C25alkanoyloxy, Cl-C25alkanoylamino, C3-C25alkenoyloxy, C3-C25alkanoyloxy which is interrupted by oxygen, sulfur or N-R14; C;6- Cgcycloalkyl- carbonyloxy, benzoyloxy or Cl-CI2alkyl-substituted benzoyloxy; or else the radicals R2 and R3 or the radicals R3 and R4or the radicals R4and R5, together with the carbon atoms to which they are attached, form a benzo ring, R4is additionally -(CH2)p-COR15 or -(CH2)q01-1 or, if R3, R5and R6 are hydrogen, R4is additionally a radical of the formula Ill 0 0 H R2 R, (111) in which R, is defined as indicated above for n = 1, R6 is hydrogen or a radical of the formula IV 0 0 R2 1 R, R3 R5 R4 (IV) where R4is not a radical of the formula lit and R, is defined as indicated above for n = 1, R7, Re, R9, R10 and IR,, independently of one another are hydrogen, halogen, hydroxyl, Cl-C25alkyl, C2-C25alkyl interrupted by oxygen, sulfur or N-R14; CI- C25alkoxy, C2-C25alkoxy interrupted by oxygen, sulfur or N-1114; Cl-C25alkylthio, C3- C25alkenyl, C3-C25alkenyloxy, C3-C25alkynyl, C3-C2salkynyloxy, OrC9phenylalkyl, C7- C9phenylalkoxy, unsubstituted or Cl-C4alkyl-substituted phenyl; unsubstituted orCl-C4alkyl-substtuted phenoxy; unsubstituted or Cl- C4alkyl-substituted C5-C8cycloalkyl; unsubstituted or Cl-C4alkyl- substituted C5-Cacycloalkoxy; Cl-C4alkylamino, di(C1-C4al")amino, Cl-C25alkanoyl, C3-C2ralkanoyl interrupted by oxygen, sulfur or N-R14 Cl-C25alkanoyloxy, C3-C25alkanoyloxy interrupted by oxygen, sulfur or N- R14 Cl-C2,salkanoylamino,C3-C25alkenoyl,C3-C2,5alkenoyI interrupted by oxygen, sulfur or N-R14; C3-C25alkenoyloxy, C3-C2ralkenoyloxy interrupted by oxygen, sulfur or N-RU; C6-C9cycloalkylcarbonyl, C6-C9cycloalkylcarbonyloxy, benzoyl or Cl- C12alky]- substituted benzoyi; benzoyloxy or Cl-C12alkyl-substituted benzoyloxy; R18 0 R20 1 23 M19 1 1 H R22 and R8 or the radicals R8 and R, l, together with the carbon atoms to which they are attached, form a benzo ring, R12 and R13 independently of one another are unsubstituted or Cl-C4alkyl-substituted phenylene or naphthylene, R14 is hydrogen or Cl-Caalky], R15 is hydroxy], 0- -1- m Cl-Claalkoxy or -N R24 I- r rl 1 R25 R1r,, and R17 independently of one another are hydrogen, CF,3, Cl-CUalkyl or phenyl, or R16 and R17, together with the C atom to which they are attached, form a C'5-Cecycloalkylidene ring which is unsubstituted or substituted from 1 to 3 times byCl-C4al"; R18 and R19 independently of one another are hydrogen,Cl-C4alkyl or phenyl, R20 is hydrogen or Cl- C4alky], R21 is hydrogen, unsubstituted or Cl-C4alkyl-substituted phenyl; Cl-C25alkyl, C2-C2ralkyl interrupted by oxygen, sulfur or N-R; C7-Cgphenylalkyl which is unsubstituted or 14 1 substituted on the phenyl radical from 1 to 3 times by Cl-C4alky]; CrC25phenylalkyl which is unsubstituted or substituted on the phenyl radical from 1 to 3 times by Cl-C4alkyl and interrupted by oxygen, sulfur or N, N-R 14 1 or else the radicals R20 and R21, together with the carbon atoms to which they are attached, form a CS-CUCYCloalkylene ring which is unsubstituted or substituted from 1 to 3 times byCl-C4alky]; -6 R22 is hydrogen or CI-C4alkyl, R23 is hydrogen, Cl-C25alkanoyl, C3- C25alkenOYI, C3-C25alkanoyl interrupted by oxygen, sulfur or N-R14; C2-C2,5alkanoyl substituted byadi(C1-C6alkyl)phosphonate group; C6-C9cycloalkylcarbonyl, thenoyl, furoyl, benzoyl or Cl-C12alkyl- substituted benzoy]; H3C', / CH3 0 - Cl,, CH 3 11 -C H - -OH s22s 0 -26 0 11 -C-CHi-C 1 L; H3C', / CH3 c, CH3 -OH F6 2 H / CH3 0 CH 3 11 -C-CH:p-S-CH2 -OH R26 0 0 0 P 11 11 or 11 -C-Rg-C-R2. -C - R2-9-- Rm R24and R25independently of one another are hydrogen or Cl-C,8alkyl, R26is hydrogen or Cl-Csalkyl, Rz7 is a direct bond, Cl-Cisalkylene,C2- Cl8alkylene interrupted by oxygen, sulfur or N-R 14; C2-Clsalkenylene, C2-C20alkylidene, C7-C2Ophenylalkylidene, 3 C5-C8cycloalkylene, C7-C8bicycloalkylene, unsubsfituted or Cl-C4alkylsubstituted phenylene, or / or l 0 S 1 R28ishydroxyl, [_0--LMr+] Cl-Cle-alkoxyor -N R24 r R25 0 R29 is oxygen, -NH- or \ 11 N-C-NH- R30 is Cl-Clealkyl or phenyl, 3 R31 is hydrogen or Cl-Cl8alkyl, M is an r-valent metal cation, X is a direct bond, oxygen, sulfur or -NR31-, n is 1 or 2, p is 0, 1 or 2, q is 1, 2, 3, 4, 5 or 6, r is 1, 2 or 3, and s is 0, 1 or 2.

Unsubstituted or Cl-C4alkyl-, Cl-C4alkoxy-, Cl-C4alkylthio-, hydroXY1-, halo-, amino-, Cl-C4alkylamino-, phenylamino- or di(CI-C4alkyi)aminosubstituted naphthyl, phenanthryl, anthryl, 5,6,7,8-tetrahydro-2-naphthyl, 5,6,7,8-tetrahydro-l-naphthyl, thienyl, benzo[b]thienyl, naphtho[2,3blthienyi, thianthrenyl, dibenzofuryl, chromenyl, xanthenyl, phenoxathiinyl, pyrrolyl, imidazolyl, pyrazoly], pyrazinyl, pyrimidinyl, pyridazinyl, indolizinyl, isoindoly], indolyl, indazolyl, purinyl, quinoliziny], isoquinolyl, quinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, pteridinyl, carbazolyl, Pcarbolinyl, phenanthridinyl, acridinyl, perimidinyi, phenanthrolinyl, phenaziny], isothiazolyl, phenothiazinyl, isoxazolyl, furazany], biphenyl, terphenyl, fluorenyl or phenoxazinyl is, for example, l-naphthyi, 2naphthyl, 1-phenyiamino4-naphthyl, 1-methyinaphthyi, 2-methyinaphthyl, 1methoxy-2-naphthyl, 2-methoxy-l-naphthyl, 1-dimethylamino-2-naphthyi, 1,2dimethyi-4-naphthy], 1,2-dimethyl-6-naphthy], 1,2dimethyl-7-naphthyi, 1,3dimethyl-6-naphthyl, 1,4-dimethyl-6-naphthyi, 1,5-dimethyi-2naphthyl, 1,6dimethyl-2-naphthyi, 1-hydroxy-2-naphthy], 2-hydroxy-l-naphthyi, 1,4dihydroxy-2-naphthyl, 7-phenanthry], 1-anthry], 2-anthryl, 9-anthryl, 3benzo[b]thienyl, 5-benzo[b]thienyl, 2-benzo[b]thienyl, 4-dibenzofuryl, 4, 7-dibenzofuryi, 4-methyl-7-dibenzofuryi, 2xanthenyl, 8-methyl-2-xanthenyl, 3-xanthenyl, 2-phenoxathiiny], 2,7-phenoxathiinyi, 2-pyrrolyl, 3pyrrolyl, 5-methyl-3-pyrrolyi, 2-imidazolyi, 4-imidazoly], 5-imidazoly], 2-methyl-4-imidazolyi, 2-ethyl-4-imidazolyl, 2-ethyi-5-imidazoiyi, 3pyrazoly], 1-methyl-3-pyrazoly], 1-propyl4-pyrazolyi, 2-pyraziny], 5,6dimethyl-2-pyraziny], 2-indolizinyl, 2-methyi-3-isoindoiyi, 2-methyi-lisoindoiyl, 1-methyl-2-indoiyl, 1-methyf-3-indoly], 1,5-dimethyl-2indolyi, 1-methyl-3indazolyl, 2,7-dimethyl-8-pudnyi, 2-methoxy-7-methy]-8purinyi, 2-quinolizinyi, 3-isoquinolyl, 6-isoquinolyl, 7-isoquinolyl, isoquinolyl, 3-methoxy-6-isoquinoiyi, 2-quinolyl, 6-quinolyl, 7-quinolyl, 2-methoxy-3-quinolyi, 2-methoxy-6-quinolyl, 6-phthalaziny], 7phthalazinyl, 1-methoxy6-phthalazinyi, 1,4-dimethoxy-6-phthalazinyi, 1,8naphthyridin-2-yl, 2-quinoxalinyl, 6-quinoxalinyi, 2,3-dimethyl-6quinoxaliny], 2,3-dimethoxy-6-quinoxalinyi, 2-quinazolinyl, 7quinazolinyi, 2-dimethylamino-6-quinazolinyi, 3-cinnolinyl, 6-cinnolinyl, 7-cinnoliny], 3-methoxy-7cinnolinyl, 2-pteridinyl, 6-pteridinyl, 7-pteridinyl, 6,7- dimethoxy-2-pteridinyi, 2-carbazolyl, 3carbazolyl, 9-methyi-2-carbazoiyi, 9-methyi-3-carbazoiyt, P-carbolin-3-yl, 1-methyl-p-carbolin3-yl, 1-methyi- p-carbolin-6-yl, 3-phenanthridinyl, 2-acridinyl, 3-acridinyl, 2- perimidinyl, 1-methyi-5-perimidinyl, 5-phenanthrolinyl, 6-phenanthrolinyl, 1-phenazinyl, 2-phenazinyl, 3-isothiazoly], 4-isothiazolyi, 5- isothiazolyl, 2-phenothiazinyl, 3-phenothiazinyl, 10-methyl-3- phenothiazinyi, 3-isoxazolyl, 4-isoxazolyl, 5-isoxazoiyi, 4-methyl-3- furazanyl, 2-phenoxazinyl or 10methyl-2-phenoxaziny].

Particular preference is given to unsubstituted orCl-C4alkyl-, Cl-CAlkoxy, Cl-CAlkylthio-, hydroxyi-, phenylamino- or di(C1-C4alkyl)aminosubstituted naphthyl, phenanthryl, anthryl, 5,6,7,8-tetrahydro-2-naphthyl, 5,6,7,8-tetrahydro-l-naphthyl, thienyl, benzo[b]thienyl, naphtho[2,3b]thienyi, thianthrenyl, dibenzofuryl, chromeny], xantheny], phenoxathiinyl, pyrrolyl, isoindolyl, indolyl, phenothiaziny], biphenyl, terphenyl, fluorenyl or phenoxazinyl, for example l-naphthyi, 2-naphthyi, 1-phenylamino-4-naphthyl, 1-methyinaphthyi, 2-methyinaphthyi, lmethoxy-2naphthyl, 2-methoxy-i-naphthyl, 1 -dim ethylam ino-2-naphthyl, 1,2dimethyf-4naphthyl, 1,2-dimethyl-6-naphthyi, 1,2-dimethyi-7-naphthy], 1,3dimethyi-6-naphthyl, 1,4dimethyi-6-naphthyl, 1,5-dimethyl-2-naphthyi, 1,6dimethyl-2-naphthyl, 1-hydroxy-2-naphthyl, 2-hydroxy-l-naphthyl, 1,4dihydroxy-2-naphthyi, 7-phenanthryl, 1-anthryl, 2-anthryl, 9-anthry], 3benzo[bIthienyl, 5-benzo[bIthienyl, 2-benzo[b]thienyi, 4-dibenzofuryl, 4, 7-dibenzofury], 4-methy]-7-dibenzofuryi, 2-xanthenyl, 8-methyi-2xanthenyi, 3-xanthenyl, 2-pyrrolyl, 3pyrrolVI, 2-phenothiazinyl, 3phenothiaziny], 10-methyi-3-phenothiaziny].

Halogen (halo) is, for example, chlorine, bromine or iodine. Preference is given to chlorine.

Alkanoyl having up to 25 carbon atoms is a branched or unbranched radical, for example formyi, acetyl, proplonyl, butanoyl, pentanoyl, hexanoyl, heptanoyl, octanoyl, nonanoyl, decanoyi, undecanoyl, dodecanoyl, tridecanoyl, tetradecanoyl, pentadecanoy], hexadecanoyl, heptadecanoyl, octadecanoyl, eicosanoyl or docosanoyl. Preference is given to alkanoyl having 2 to 18, especially 2 to 12, for example 2 to 6 carbon atoms. Particular preference is given to acetyl.

G2-C25alkanoyl substituted by a di(C1-C6alkyi)phosphonate group is, for example, (CH3CH20)2POCH2C0-, (CH30)2POCH2C0-, (CH3CH2CH2CH20)2POCH2CO-Y (CH3CH20)2POCH2CH2CO-P (CH30)2POCH2CH2CO-Y (CH3CH2CH2CH20)2POCH2CH2C0-, (CH3CH20)2PO(CH2)4C0-, (CH3CH20)2PO(C1-12)8CO- or (CH3CH20)2PO(C1-12)17CO- Alkanoyloxy having up to 25 carbon atoms is a branched or unbranched radical for example formyloxy, acetoxy, propionyloxy, butanoyloxy, pentanoyloxy, hexanoyloxy, heptanoyloxy, octanoyloxy, nonanoyloxy, decanoyloxy, undecanoyloxy, dodecanoyloxy, tridecanoyloxy, tetradecanoyloxy, pentadecanoyloxy, hexadecanoyloxy, heptadecanoyloxy, octadecanoyloxy, eicosanoyloxy or docosanoyloxy. Preference is given to alkanoyloxy having 2 to 18, especially 2 to 12, for example 2 to 6 carbon atoms. Particular preference is given to acetoxy.

Alkenoyl having 3 to 25 carbon atoms is a branched or unbranched radical, for example propenoyl, 2-butenoyl, 3-butenoyl, isobutenoyl, n-2,4pentadienoyl, 3-methyl-2-butenoyl, n-2octenoyl, n-2-dodecenoyl, isododecenoyl, oleoyl, n-2-octadecenoyl or nctadecenoyl. Preference is given to alkenoyl having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

C3-C25alkenoyl interrupted by oxygen, sulfur or N-R14 is, for example, C1-130CH2CH2CH=CHCO- or CH30CH2CH2OCH=CHCO-.

Alkenoyloxy having 3 to 25 carbon atoms is a branched or unbranched radical, for example propenoyloxy, 2-butenoyloxy, 3-butenoyloxy, isobutenoyloxy, n-2,4-pentadienoyloxy, 3methyl-2-butenoyloxy, n-2octenoyloxy, n-2-dodecenoyloxy, iso-dodecenoyloxy, oleoyloxy, n2octadecenoyloxy or n-4-octadecenoyloxy. Preference is given to alkenoyloxy having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

C3-C2salkenoyloxy interrupted by oxygen, sulfur or N-R14 is, for example, C1-130CH2CH2CH=CHCOO- or CH3OCH2CH2OCH=CHCOO-.

C3-C25alkancyl interrupted by oxygen, sulfur or N-R14 is, for example, CH3-0-CH2C0-, C1-13-S-CH2C0-, C1-13-NH-CH2C0-, CHA(C1-13)-CH2CO-Y CH3-0-CH2CH2-0-CH2C0-, CH3-(0-CH2CH2-)20-CH2CO-Y CHAO-CH2CH210-CH2CO- or CH3-P-CH2 CHA40-CH2CO-- C3-C25alkanoyloxy interrupted by oxygen, sulfur or N-R14 is, for example, CH3-0-CH2C00-9CH3-S-CH2C00-, CH3-NH-CH2C00-, CHA(CH3)-CH2C00-, CH3-0- CH2CH2-0-CH2C00-, CH3-(0-CH2CH2-)20-CH2C00-, C1-13-(O-CH2C1-12-)30-CH2C00- or CH3-(0-CH2CH2-)40-CH2COO-.

C6-C9cycloalkylcarbonyl is, for example, cyclohexylcarbonyl, cycloheptylcarbonyl or cyclooctylcarbonyl. Cyclohexylcarbonyl is preferred.

C6-C9cycloalkylcarbonyloxy is, for example, cyclohexylcarbonyloxy, cycloheptylcarbonyloxy or cyclooctylcarbonyloxy. Cyclohexylcarbonyloxy is preferred.

Cl-C12alkyl-substituted benzoyi, which preferably carries 1 to 3, especially 1 or 2 alkyl groups, is, for example, o-, m- or prnethylbenzoyl, 2,3-dimethylbenzoVI, 2,4-dimethylbenzoyi, 2,5dimethylbenzoyl, 2,6-dimethylbenzoyl, 3,4-dimethylbenzoyl, 3,5dimethylbenzoy], 2methyl-6-ethylbenzoyi, 4-tert-butylbenzoyl, 2ethyibenzoyl, 2,4,6-trimethylbenzoyi, 2,6-dimethyl-4-tert-butylbenzoyl or 3,5-di-tert-butyibenzoyi. Preferred substituents are Cl-C8alkyl, especially Cl-C4alkyl.

Cl-C12alkyi-substituted benzoyloxy, which preferably carries 1 to 3, especially 1 or 2 alkyl groups, is, for example, o-, m- or pmethylbenzoyloxy, 2,3-dimethylbenzoyloxy, 2,4-dimethy]benzoyloxy, 2,5dimethyibenzoyfoxy, 2,6-dimethyibenzoyfoxy, 3,4-dimethylbenzoyloxy, 3, 5dimethyibenzoyloxy, 2-methyi-6-ethyibenzoyloxy, 4-tert-butylbenzoyfoxy, 2-ethyi-benzoyloxy, 2,4,6-trimethyibenzoyloxy, 2,6-dimethyi-4-tertbutyibenzoyloxy or 3,5-di-tert-butyibenzoyloxy. Preferred substituents are Cl-Cealky], especiallyCl-C4alkyl.

Alkyl having up to 25 carbon atoms is a branched or unbranched radical, for example methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-buM, 2-ethylbuM, n-pentyl, isopenty], 1-methylpenty], 1,3-dimethyibutyl, n-hexyi, 1-methyihexyl, n- heptyi, isoheptyl, 1,1,3,3-tetramethyibutyl, 1-methyihepty], 3- methyiheptyl, n-octyi, 2-ethyihexyi, 11,11,3-trimethylhexyi, 1,1,3,3- tetramethylpentyi, nonyl, decyl, undecyl, 1 -methyl u ndecyi, dodecyl, 1, 1,3,3,5,5-hexamethyihexyi, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecy], octadecyl, eicosyl or docosyl. One of the preferred meanings of R2 and R4 is, for example, Cl-C18alkyl. A particularly preferred meaning of R4 is Cl-CAlkyl.

Alkenyl having 3 to 25 carbon atoms is a branched or unbranched radical, for example propenyl, 2-buteny], 3-butenyl, isobutenyl, n-2,4-pentadienyl, 3-methyi-2-butenyi, n-2-octenyi, n2-dodecenyl, iso-dodecenyl, oleyl, n-2octadecenyl or n-4-octadecenyi. Preference is given to alkenyl having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

Alkenyloxy having 3 to 25 carbon atoms is a branched or unbranched radical, for example propenyloxy, 2-butenyloxy, 3-butenyloxy, isobutenyloxy, n-2,4-pentadienyloxy, 3-methyl-2butenyloxy, n-2-octenyloxy, n-2-dodecenyloxy, iso-dodecenyloxy, oleyloxy, n-2-octadecenyloxy or n-4octadecenyloxy. Preference is given to alkenyloxy having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

Alkynyl having 3 to 25 carbon atoms is a branched or unbranched radical, for example pro- pynyl ( -CH 2 CCH), 2-butynyl, 3-butynyl, n-2-octynyl, or n-2-dodecynyl. Preference is given to alkynyl having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

Alkynylloxy having 3 to 25 carbon atoms is a branched or unbranched radical, for example propynyloxy ( -OCHi--CCH), 2-butynyloxy, 3-butynyloxy, n-2-octynyloxy, or n-2-do- decynyloxy. Preference is given to alkynyloxy having 3 to 18, especially 3 to 12, for example 3 to 6, in particular 3 to 4 carbon atoms.

11 C2-C25alkyl interrupted by oxygen, sulfur or N-R14is, for example, CH3-0- CH2-, C1-13-S-CH2-, C1-13-NI-I-CH2-, CHA(C1-13)-CH2-, CH3-0-CH2CH2-0-CH2-, CH3- (0-CH2CH2-)20-CH2-, CHAO-CH2CH210-CH2- or CH3-(0-CH2CH2-)40-CH2-- C7-C9phenytalkyl is, for example, benzyi, a-methyibenzy], et,a- dimethylbenzyi or 2-phenylethyl. Benzyl and ct,cc-dimethyibenzyl are preferred.

C7-C9phenyllalkyl which is unsubstituted or substituted on the phenyl radical from 1 to 3 times by Cl-C4alkyl is, for example, benzyi, amethyibenzyi, cc,(x-dimethytbenzyi, 2-phenylethyl, 2-methyibenzyl, 3methyibenzyi, 4-methyibenzyi, 2,4-dimethyibenzyi, 2,6-dimethyibenzy] or 4tert-buty[benzyi. Benzyl is preferred.

C7-C25phenylalkyl which is unsubstituted or substituted on the phenyl radical from 1 to 3 times byCI-C4alkyl and is interrupted by oxygen, sulfur or N-R is a branched or un- I/ branched radical, for example phenoxymethyl, 2-methylphenoxymethyi, 3- methylphenoxymethyl, 4-methylphenoxymethyi, 2,4-dimethylphenoxymethyi, 2, 34 m ethylphenoxym ethyl, phenytthiomethyi, N-methyi-N-phenyimethy], Wethyl-N-phenyl methyl, 4-tert-butylphenoxymethyl, 4-tert- butytphenoxyethoxymethyl, 2,4-di-tert-butylphenoxymethyi, 2,4-di-tert- butylphenoxyethoxymethy], phenoxyethoxyethoxyethoxymethyi, benzyloxymethyi, benzyloxyethoxymethyl, N-benzyi-Wethyl methyl or N- benzyi-N-isopropyimethyl.

C7-C9phenylalkoxy is, for example, benzyloxy, a-methylbenzyloxy, a,adimethylbenZY1oxy or 2-phenylethoxy. Benzyloxy is preferred.

Cl-C4alkyl-substituted phenyl, which preferably contains 1 to 3, especially 1 or 2 alkyl groups, is, for example, o-, m- or p-methylphenyl, 2,3-dimethylphenyl, 2,4-dimethylphenyl, 2,5-dimethylphenyi, 2,6dimethylphenyl, 3,4-dimethylphenyl, 3,5-dimethylphenyi, 2-methyl6ethylphenyl, 4-tert-butylphenyl, 2-ethylphenyl or 2,6-diethylphenyl.

Cl-C4alkyl-substituted phenoxy, which preferably contains 1 to 3, especially 1 or 2 alkyl groups, is, for example, o-, m- or pmethylphenoxy, 2,3-dimethylphenoxy, 2,4-dimethylphe- noxy, 2,5-dimethylphenoxy, 2,6-dimethylphenoxy, 3,4-dimethylphenoxy, 3,5dimethylphenoxy, 2-methyi-6-ethylphenoxy, 4-tert-butylphenoxy, 2ethylphenoxy or 2,6-diethylphenoxy.

Unsubstituted orCl-C4alkyl-substituted C5-C8cycloalkyl is, for example, cyclopentyl, methylcyclopentyl, dimethylcyclopentyl, cyclohexyl, methylcyclohexyl, dimethylcyclohexyl, tdmethy]cyclohexy], tertbutylcyclohexyl, cycloheptyl or cyclooctyl. Preference is given to cyclohexyl and tert-butylcyclohexy].

Unsubstituted or Cl-C4alkyl-substituted C5-C8cycloalkoxy is, for example, cyclopentoxy, methylcyclopentoxy, dimethylcyclopentoxy, cyclohexoxy, methylcyclohexoxy, dimethylcyclohexoxy, trimethylcyclohexoxy, tertbutylcyclohexoxy, cycloheptoxy or cyclooctoxy. Preference is given to cyclohexoxy and tert-butylcyclohexoxy.

Alkoxy having up to 25 carbon atoms is a branched or unbranched radical, for example methoxy, ethoxy, propoxy, isopropoxy, n-butoxy, isobutoxy, pentoxy, isopentoxy, hexoxy, heptoxy, octoxy, decyloxy, tetradecyloxy, hexadecyloxy or octadecyloxy. Preference is given to alkoxy having 1 to 12, especially 1 to 8, for example 1 to 6 carbon atoms.

C2-C25alkoxy interrupted by oxygen, sulfur or N-R 4 is, for example, CH30-CH2CH20-, C1-13-S-CH2CH20-, CHAH-CH2CH20-, CH3-N(CH3)-CH2CH20-, CH3-0-CH2C1-12-0- CH2CH20-, CH3-(0-CH2CH2-)20-CH2CH20-, CH3-(O-CH2C1-12-)30-CH2CH20- or C1- 13-(O-CH2CHA40-CH2CH20-.

Alkylthio having up to 25 carbon atoms is a branched or unbranched radical, for example methylthio, ethylthio, propylthio, isopropylthio, nbutylthio, isobuMthio, pentylthio, isopentylthio, hexylthio, heptylthio, octylthio, decylthio, tetradecylthio, hexadecylthio or octadecylthio. Preference is given to alkylthio having 1 to 12, especially 1 to 8, for example 1 to 6 carbon atoms.

Alkylamino having up to 4 carbon atoms is a branched or unbranched radical, for example methylamino, ethylamino, propylamino, isopropylamino, n-butylamino, isobutylamino or tertbutylamino.

Di(C1-C4alkyl)amino also means that the two radicals independently of one another are branched or unbranched,, for example dimethylamino, methylethylamino, diethylamino, methyl-n-propylamino, methylisopropylamino, methyl-n-butylamino, methylisobutylamino, ethylisopropylamino, ethyl-n-butylamino, ethylisobutylamino, ethykertbutylamino, diethylamino, diisopropylamino, isopropyl-n-butylamino, isopropylisobutylamino, di-n-butylamino or diisobutylamino.

Alkanoylamino having up to 25 carbon atoms is a branched or unbranched radical, for example formylamino, acetylamino, propionylamino, butanoylamino, pentanoylamino, hexanoylamino, heptanoylamino, octanoylamino, nonanoylamino, decanoylamino, undecanoylamino, dodecanoylamino, tridecanoylamino, tetradecanoylamino, pentadecanoylamino, hexadecanoylamino, heptadecanoylamino, octadecanoylamino, eicosanoylamino or docosanoylamino. Preference is given to alkanoylamino having 2 to 18, especially 2 to 12, for example 2 to 6 carbon atoms.

Cl-C18alkylene is a branched or unbranched radical, for example methylene, ethylene, propylene, trimethylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, decamethylene, dodecamethylene or octadecamethylene. Preference is giventO ClC12alkylene, especially Cl-QBalkylene.

A Cl-C4alkyl-substituted C5-C12CYCloalkylene ring, which preferably contains 1 to 3, especially 1 or 2 branched or unbranched alkyl group radicals, is, for example, cyclopentylene, methy]cyclopentylene, dimethylcyclopentylene, cyciohexylene, methylcyclohexylene, dimethylcyciohexylene, trimethylcyclohexylene, tert-butylcyclohexylene, cycloheptylene, cyclooctylene or cyclodecylene. Preference is given to cyclohexylene and tert-butylcyclohexylene.

C2-C,8alkylene interrupted by oxygen, sulfur or N-1314 is, for example, CH2-0-CH2-, -CH2-S-CH2-, -CH2-NI-I-CH2-, -CH2-N(CH3)-CH2-, -CH2-0-CH2CH2-0-CH2-, -CH2- (0-CH2CH2-)20-CH2-, -CH2-(0-CH2CH2-)30-CH2-, -CH2-(0-CH2CH2-)40-CH2- or - CH2CH2-S-CH2CH2-- C2-C18alkenylene is, for example, vinylene, methylvinylene, octenylethylene or dodeceny]ethylene. Preference is given to C2- Cealkenylene.

Alkylidene having 2 to 20 carbon atoms is, for example, ethylidene, propylidene, butylidene, pentylidene, 4-methylpentylidene, heptylidene, nonylidene, tridecylidene, nonadecylidene, 1-methylethylidene, 1ethylpropylidene or 1-ethylpentylidene. Preference is given to C2Cealkylidene.

Phenylalkylidene having 7 to 20 carbon atoms is, for example, benzylidene, 2-phenylethylidene or 1 -phenyl-2-hexylidene. Preference is given to CrC9-phenylalkylidene.

Cs-C8cycloalkylene, is a saturated hydrocarbon group having two free valencies and at least one ring unit and is, for example, cyclopentylene, cyclohexylene, cycloheptylene or cyclooctylene. Preference is given to cyclohexylene.

CrQBbicycloalkylene is, for example, bicycloheptylene or bicyclooctylene.

Unsubstituted or Cl-C4alkyl-substituted phenylene or naphthylene is, for example, 1,2-, 1,3-, 1,4-phenylene, 1,2-, 1,3-, 1,4-, 1,6-, 1,7-, 2,6- or 2,7-naphthylene. 1,4-Phenylene is preferred.

A Cl-C4alkyl-substituted C5-Qqcycloalkylidene ring, which preferably contains 1 to 3, especially 1 or 2 branched or unbranched alkyl group radicals, is, for example, cyclopentylidene, methylcyclopentylidene, dimethylcyclopentylidene, cyclohexylidene, methylcyclohexylidene, dimethylcyclohexylidene, trimethylcyclohexylidene, tertbutylcyclohexylidene, cycloheptylidene or cyclooctylidene. Preference is given to cyclohexylidene and tert-butylcyclohexylidene.

A mono-, di- or trivalent metal cation is preferably an alkali metal, alkaline earth metal or aluminium cation, for example, Na, K, Mg', CA' or AI'.

Compositions that are of interest include those comprising as component (b) at least one compound of the formula 1 in which, 9 n is 1, R, is unsubstituted phenyl or phenyl which is substituted in the para position by Cl-Clealkylthio or di(C1-Calkyl)arnino; mono- to penta- substituted alkylphenyl having in total together not more than 18 carbon atoms in the 1 to 5 alkyl substituents; or is unsubstituted or Cl-CAlkyl-, Cl-C4alkoxy-, Cl-CAlkylthio-, hydroxy]- or amino-substituted naphthyl, biphenyl, terphenyl, phenanthryll, anthryl, fluorenyl, carbazoly], thienyl, pyrrolyl, phenothiazinyl or 5,6,7,8-tetrahydronaphthyi.

Preference is given to compositions comprising as component (b) at least one compound of the formula 1 in which, if n is 2, R, is -R12-X-R13-, R12 and R13 are phenylene, X is oxygen or -INIR31-, and R31 is Cl-C4alkyl.

Preference is also given to compositions comprising as component (b) at least one compound of the formula 1 in which, if n is 1, R, is unsubstituted or Cl-C4alkyl-,Cl-CAlkoXY-, Cl-CAlkylthio-, hydroxyi-, halo, amino-, Cl-C4alkylarnino- or di(C1-C4-alkyi)amino-substituted naphthyi, phenanthryll, thienyl, dibenzofuryl, carbazolyl, fluorenyl or a radical of the formula 11 R9 R10 1 R#7R11 Re (11) R7, Re, R.9, Rio and R11 independently of one another are hydrogen, chlorine, bromine, hydroxyl, Cl-Cl8alkyl, C2-Cisalkyl interrupted by oxygen or sulfur; CI-Clealkoxy, C2-Clealkoxy interrupted by oxygen or sulfur; Cl-C,8alkylthio,C3-Ci2alkenyloxy, C3-Cl2alkynyloxy, CrCgphenylalkyl, C7-Cgphenylaikoxy, unsubstituted or Cl-c4alkyl- substituted phenyl; phenoxy, cyclohexyl, Cs-C8cycloalkoxy, CI- C4alkylamino, di(Cl-C4-alkyl)amino, Cl-Cl2alkanoyl, C3-Cl2alkanoyl interrupted by oxygen or sulfur; Cl-C,2alkanoyloxy, C3-Cl2alkanoyloXY interrupted by oxygen or sulfur; Cl-Cl2alkanoylamino, C3-Cl2alkenoyl, C3- C,2alkenoyloxy, cyclohexylcarbonyl, cyclohexylcarbonyloxy, benzoyl or Ci- C4alkyl-substituted benzoyl; benzoyloxy or Cl-C4alkyl-substituted benzoyloxy; R18 0 521 MI9 H R22 and R8 or the radicals R8 and IR,,, together with the carbon atoms to which they are attached, form a benzo ring, n24 R15is hydroxyi,Cl-C12a]koxy or -N 1%, R25 9 R18 and R19 independently of one another are hydrogen or CI-C4alkyl, R2o is hydrogen, R21 is hydrogen, phenyl,Cl-Cl8alkyl, C2-ClSalkyl interrupted by oxygen or sulfur;C7-Cgphenylalkyl, C-rC,8-phenylalkyl which is unsubstituted or substituted on the phenyl radical from 1 to 3 times by C1-C4alkyl and is interrupted by oxygen or sulfur, or else the radicals R2o and R21, together with the carbon atoms to which they are attached, form a cyclohexylene ring which is unsubstituted or substituted from 1 to 3 times by Cl-C4alkyl, R22 is hydrogen or CI-C4alkyl, R23 is hydrogen, Cl- C,8alkanoyl, C3-Cisalkenoyl, C3-Cl2alkanoyl interrupted by oxygen or sulfur; C2-C,2alkanoyl substituted by a di(CI-C6-alkyl)phosphonate group; C6-CqcycloaIkyl- H3C1, 1 CH3 0 CH3 11 -C-CI;H2-5- OH carbonyl, benzoyi, H3C' / CH3 0 C, CH3 CH OH 2 C-CHi-S4 R26 0 0 11 11 or -C-RiF-C-R2.

Fla 0 11 9 -;-CHi--C- 1 CH3 0 11 - C - R2-9 FIX p R24 and R25 independently of one another are hydrogen or Cl-C12alkyl, CH H3C / CH 3 -OH L Ra 3 2 R26 is hydrogen or Cl-C4alkyl, R27 is Cl-C12alkylene, C2-C8alkenylene, C2- C8alkylidene, GrC12phenylalkylidene, C5-C8cycloalkylene or phenylene, F 4 R29 is hydroxyl, Cl-C12alkoxy or -N 11.1 R29 is oxygen or -NH-, R30 is Cl-Claalkyl or phenyl, and s is 1 or 2.

1 Preference is likewise given to compositions comprising as component pound of the formula 1 in which, if n is 1, R, is phenanthryl, thienyl, dibenzofury], unsubstituted orCl-C4alkyl-substituted carbazolyl; or is fluorenyl; or R, is a radical of the formula 11 at least one com- R9 RIO 1 R7 R,, R8 R7, R8, R9, Rio and R,, independently of one another are hydrogen, chlorine, hydroxyl, Cl-C18alkyl, Cl-Clealkoxy, Cl-C18alkylthio, C3- C4alkenyloxy,C03-C4alkynyloxy, phenyl, benzoy], Ft,o R 1, 1 21 benzoyloxyor -0-C-C-0-P,,3 1 1 H R22 R2o is hydrogen, R21 is hydrogen, phenyl or Cl-Clealkyl, or else the radicals R20 and R21, together with the carbon atoms to which they are attached, form a cyclohexylene ring which is unsubstituted or substituted from 1 to 3 times by Cl-C4alkyl, R22is hydrogen orCl-C4alkyi, and R23is hydrogen, Cl-CI2alkanoyl or benzoyi.

Particular preference is given to compositions comprising as component (b) at least one compound of the formula 1 in which, if n is 1, R7, R8, R9, RIO and R,, independently of one another are hydrogen, Cl-C12alky], Cl-C4alkylthio or phenyl.

Of particular interest are compositons comprising as component (b) at least one compound of the formula 1 in which R2, R3, R4 and R5 independently of one another are hydrogen, chlorine, Cl-Claalkyl, benzyl, phenyl, C5-C8cycloalkyl, Cl-Claalkoxy, Cl-Clsalkylthio, Cl-Clealkanoyloxy, Cl-ClBalkanoylamino, C3-Clealkenoyloxy or benzoyloxy; or else the radicals F12 and R3 or the radicals R3 and R4 or the radicals R4 and Rs, together with the carbon atoms to which they are attached, form a benzo ring, R4 is additionally -(CH2)p-COR,s or -(CH2)qOH, or, if R3, R5 and R6 are hydrogen, R4 is additionally a radical of the formula Ill, " R24 R15 is hydroxyl, Cl-C12alkoxy or -N.'.' Rm R16 and R17 are methyl groups or, together with the C atom to which they are attached, form a C5-C8CYCloalkylidene ring which is unsubsfituted or substituted from 1 to 3 times by Cl-C4alkyl, R24and R25 independently of one another are hydrogen or Cl-CI2alkyl, p is 1 or 2, and q is 2, 3, 4, 5 or 6.

Also of particular interest are compositions comprising as component (b) at least one compound of the formula 1 in which at least two of the radicals R2, R3, R4 and Rs are hydrogen.

Of special interest are compositions comprlising as component (b) at!east one compound of the formula 1 in which R3 and R5 are hydrogen.

Of very special interest are compositons comphsing as component (b) at least one compound of the formula 1 in which R2 is Cl-C4alky], R3is hydrogen, R4 is Cl-C4alkyl or, if R6 is hydrogen, R4is additionally a radical of the formula Ill, Rs is hydrogen, and R16 and R17, together with the C atom to which they are attached, form a cyclohexylidene.

The following compounds are examples of the benzofuran-2-one type which are particularly suitable as component (b) in the novel composition: 3-[4(2-acetoxyethoxY)phenyll-5,7-ditert-butyl-benzofuran-2-one; 5,7-di-tertbutyi-3-[4-(2-stearoyfoxyethoxy)pheny1]benzofuran-2one; 3,3'-bis[5,7-ditert-butyl-3-(4-[2-.hydroxyethoxy]phenyi)benzofuran-2-one]; 5,7-ditertbutyi-3-(4-ethoxyphenyi)benzofuran-2-one; 3-(4-acetoxy-3,5dimethylphenyi)-5,7-di-tert-butyibenzofuran-2-one; 3-(3,5-dimethyi-4pivaloyloxy-phenyi)-5,7-di-tert-butyi-benzofuran-2one; 5,7-di-tert-butyl3-phenylbenzofuran-2-one; 5,7-di-tert-butyi-3-(3,4-dimethylphenyi)benzofuran-2-one; 5,7-di-tert-butyl-3-(2,3-dimethylphenyi)benzofuran-2one.

Also of special interest are compositions comprising as component (b) at least one compound of the formula V 0 0 H R9 # RS R2 RIO R R R 3 R7 11 R4 R8 (V) in which R2 is hydrogen or Cl-C6a1W, R3 is hydrogen, R4 is hydrogen or Cl- C6alkyl, Rr. is hydrogen, R7, Rr,, Rg, Rio and R,, independently of one another are hydrogen, Cl-C4alkyl or Cl-C4alkoxy, with the proviso that at least two of the radicals R7, R8, R9, RIO or R, i are hydrogen.

Very particular preference is given to compositions comprising as component (b) at least one compound of the formula Va or Vb 0 H3C',, / CH 3 0 H H 3C / CH 3 CH 3 H3 C-C-CH3 1 k;t13 (Va) or a mixture of the two compounds of the formula Va and Vb.

0 CH3 0 H CH 3 H3C,, 1 H 3C / CH 3 HP-C-CH3 1 L;t'3 (Vb) The compounds of the benzofuran-2-one type as component (b) in the novel composition are known in the literature and their preparation is described, for example, in the following USpatents: US 4,325,863; US 4, 388,244; US 5,175,312; US 5,252,643; US 5,216,052; US 5,369,159; US 5,488,117; US 5,356,966; US 5,367,008; US 5,428,162; US 5,428,177 or US 5,516,920.

Of particular interest are compositions comprising as component (c) at least one compound from the group of the organic phosphites or phosphonites of the formulae 1 to 7 / O-R2 / O-W2 1\ O-W3 - \ O-W3 R, 7 1% R, Co P-O--A' 1 0 - q' (2) - n@ 0 X U- / P-O-Rl (4) - H 3C 0 - P 1 0 R'-0oy: /P-O-WI (5) P 0 0 W14 (6) E 0- _R14 -P ZI R15 R115 0- W14 R' 14 Y P P 1 000 (11 0, P.I 11 Q? z 9 in which the indices are integral and n' is 2, 3 or 4; p'is 1 or 2; q'is 2 or 3; e is 4 to 12; yis 1, 2 or 3; and Zis 1 to 6; A', if n' is 2, is C2-C,8alkylene; C2-Cl2alkylene interrupted by oxygen, sulfur or -NR'4-; a R'S R'S radical of the formula -O-B'-0- BI "' - W6 WC, or phenylene; A, if n' is 3, is a radical of the formula -C eH2e-l-; k, if n' is 4, is CHi--CHi-C-CHi-1 U111- A' has the meaning of A' if n' is 2; Sis a direct bond, -CH2-, -CHR'4-, - CR'1R'4-, sulfur or Cs-C7CycloalWidene, or is cyclohexylidene substituted by from 1 to 4 Cl-C4alkyl radicals in position 3, 4 andlor 5; U, 9 p' is 1, is methyl and, if p' is 2, is -CH20CH2-; E, if y'is 1, is Cl-Claalkyl, -OR', or halogen; E, if y is 2, is -0-A"-0-, (7) E, if y is 3, is a radical of the formula W4C(CH201 or N(CH2CH20-)3; Q' is the radical of an at least z'-valent alcohol or phenol, this radical being attached via the oxygen atom to the phosphorus atom; R',, W2 and W3 independently of one another are unsubstituted or halogen, -COOR4% -CN- or bstituted Cl-C18alkyl;C2-C18alkyl interrupted by oxygen, sulfur or - NR'4-; C7-C9phenylalkyl; CS-C12cycloalkyi, phenyl or naphthyl; naphthyl or phenyl substituted by halogen, 1 to 3 alkyl radicals or alkoxy radicals having in total 1 to 18 carbon atoms or by C7-C9phenytalkyl; or are a radical of the formula _ R5 (CH2) M, OH W-0- Rr in which m' is an integer from the range 3 to 6; R'4is hydrogen, Cl-Clealkyl, C5- C12cycloalkyl or GrC9phenylalkyl, R'5and R'6 independently of one another are hydrogen, Cl-C8alkyl orC5-C6CYCloalkyl, R'7and R's, if q' is 2, independently of one another areCl-C4alkyl or together are a 2,3- dehydropentamethylene radical; and R'7and R'8, if q' is 3, are methyl; R'14is hydrogen, Cl-C9alkyl or cyclohexyl, R'15 is hydrogen or methyl and, if two or more radicals R'14 and W15 are present, these radicals are identical or different, X' and Y' are each a direct bond or oxygen, Z is a direct bond, methylene, -C(R'142or sulfur, and R'le,, is Cl-C8alkyl.

Of particular interest are compositions comprising as component (c) a phosphite or phosphonite of the formula 1, 2, 5 or 6, in which n' is the number 2 and y' is the number 1, 2 or 3; A' is C2-C18alkylene, pphenylene or p-biphenylene, E, if y'is 1, is Cl-ClBalkyl, -OR', or fluorine; E, if y'is 2, is p-biphenylene, E, if y' is 3, is N(CH2CH20-b, R',, R'2 and R'3 independently of one another are Cl-C18alkyl, C7C9phenytalkyl, cyclohexy], phenyl, or phenyl substituted by 1 to 3 alkyl radicals having in total 1 to 18 carbon atoms; R'14is hydrogen or ClC9alkyl, W15 is hydrogen or methyl; X' is a direct bond, Y' is oxygen, Z is a direct bond or -CH(R'16)-, and W1GiS Cl-C4alky].

Likewise of interest are compositions comprising as component (c) a phosphite or phosphonite of the formula 1, 2, 5 or 6, in which n' is the number 2 and y' is the number 1 or 3; A' is p-biphenylene, E, if y' is 1, is Cl-Claalkoxy or fluorine, E, if y' is 3, is N(CH2CH20-)3, W,, F2 and W3 independently of one another are Cl-C18alkyl, or are phenyl substituted by 2 or 3 alkyl radicals having in total 2 to 12 carbon atoms; W14 is methyl or tert-butyl; R'15 is hydrogen; X' is a direct bond; Y' is oxygen; and Z' is a direct bond, methylene or -CH(CH3)-.

Particular preference is given to compositions comprising as component (c) a phosphite or phosphonite of the formula 1, 2 or 6.

Special preference is given to compositions comprising as component (c) at least one cornpound of the formula V1 I R1 Fk-- 0- R3 R4 -3 -p (V11) in which R, and R2independently of one another are hydrogen, Cl-Cealkyl, cyclohexyl or phenyl, and R3and R4independently of one another are hydrogen orCl-C4alkyl.

The following compounds are examples of organic phosphites and phosphonites which are particularly suitable as component (c) in the novel compositions.

Triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl pentaerythritol diphosphite, tris(2,4-di-tert-butylphenyi) phosphite (1rgafos" 168, Ciba-Geigy), diisodecyl pentaerythritol diphosphite, bis(2,4-di-tert-butylphenyi) pentaerythritol diphosphite (formula D), bis(2,6-ditert-buty]-4-methylphenyi) pentaerythritol diphosphite (formula E), bisisodecyloxy-pentaerythritol diphosphite, bis(2,4-di-tert-butyi-6-methylphenyi) pentaerythritol diphosphite, bis(2, 4,6tri-tert-butylphenyl) pentaerythritol diphosphite, tristearyl sorbitol triphosphite, tetrakis(2,4-ditert-butylphenyl) 4,4'biphenylenediphosphonite (1rgafosPEP-Q Ciba-Geigy, formula H), 6isooctyloxy-2,4,8,10-tetra-tert-butyi-12H-dibenzo[d,g]-1,3,2dioxaphospho cin (formula C), 6fluoro-2,4,8,10-tetra-tert-butyf-12methyidibenzo[d,g]-1,3,2-dioxaphospho cin (formula A), bis(2,4-di-tertbutyi-6-methylphenyi) methyl phosphite, bis(2,4-di-tert-butyi-6methylphenyi) ethyl phosphite (formula G).

Particular preference is given to the use of the following phosphites and phosphonites:

tris(2,4-di-tert-butylphenyi) phosphite (1rgafos168, Ciba-Geigy), tris(nonylphenyl) phosphite, (CHIC C(C1-1J3 0 (A) H3C-CH P-F 1 0 C (CH J3 (CH IC (CHIC C(CHI 0 P-O-CH2CHI0 (CH IC C(CHI - N (B) -j 3 (CHIC C(CH J3 (CHIC 0 P-O-CH CH(C41-1jCH CH (C) 1 2 2 3 0 1 C(CHJ3 O:XOP-O--P-C(CH3)3 1 k (CHIC 0-P % - 0 0 (D) C(CHI C(CHI (CHIC (CHIC 1 0:x o', - HC 0-P P-O CH -o 0 - (E) 3 - % 0 1 3 C(CHI 0 0 1 X (F) H37C,-0-P,, X IP-O-Cl8F137 0 0 C(CHI (CH)3C--- P-0-:/ C(CHI (H) (CHI 0- H3C\ (CH3 LH3C" C\ CH3 -P-OCH2CH3 (G) -j 2 C(CHI Very particular preference is given to tris(2,4-di-tert-butylphenyi) phosphite [1rgafos168, Ci- ba SpezialitAtenchemie AGI, bis(2,4-di-tert-butyl-6-methylphenyi) ethyl phosphite [1rgafos38, Ciba SpezialitAtenchemie AG, formula (G)], or tetrakis(2,4-di-tert- butylphenyi)-4,4'-biphenylenediphosphonite (1rgafosPEP-0, Ciba SpezialitAtenchemie AG, formula (H)].

The abovementioned organic phosphites and phosphonites are known compounds; many of them are available commercially.

Compositions which are of interest include those comprising as component (d) at least one compound of the formula V1 in which R, is Cl-C4alkyl, n is 1, 2, 3 or 4, H3C \,,CH3 H3C HO- XTR2 L R, n n (V1) 11 11 Xismethylene, -CHi--CH2-C-Y- or -CHi-C-O-CHi-CHi-- OXY1011 Y is or -NH-; and, if n is 1, 0 11 X is -CHi.-CHi-C-Y-, where Y is attached to R2, and R2 is C I-C2salkyl; and, if n is 2, 9 0 11 X is -CHi---CHI--C-Y-, where Y is attached to R2, and R2 is C2-Cl2alkylene,C4-Cl2alkylene interrupted by oxygen or sulfur; or, if Y is -NH-, R2 is additionally a direct bond; and, if n is 3, 0 11 X is methylene or -CHi-C-O-CHI--CHF--, where the ethylene group is attached to R2, and R2 is Y' Y and, N Y N 0 if n is 4, 11 X is -CHi-CH2-C-y-, where Y is attached to R2, and 0 R2 is C4-Cloalkanetetrayl.

Alkyl having up to 25 carbon atoms is a branched or unbranched radical, for example methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, 2-ethlbutyi, n-pentyl, isopentyl, 1-methylpentyl, 1, 3-dimethylbutyi, n-hexyi, 1-methylhexyl, n-heptyl, isoheptyl, 1,1,3,3tetramethylbutyl, 1-methylheptyl, 3-methylheptyl, n-octy], 2-ethyihexyi, 1,1,3-trimethythexyi, 1,1,3,3-tetramethylpentyi, nonyl, decy], undecy], 1methylundecyl, dodecyl, 1,1,3,3,5,5-hexamethylhexyl, tridecyl, tetradecyl, pentadecyl, hexadecyl, heptadecyl, octadecyl, eicosyl or docosyl. A preferred definition of R, is methyl and tert-butyl. A particularly preferred definition of R2 is Cl-C2oalkyl, especially Cl-Clealkyl, for exampleC4-C18alkyl. An especially preferred definition of R2is C8Clealkyl, especiallyCl4-Clealkyi, for example C18alkyl.

C2-C12alkylene is a branched or unbranched radical, for example ethylene, propylene, tetramethylene, pentamethylene, hexamethylene, heptamethylene, octamethylene, decamethylene or dodecamethylene. A preferred definition of R2 is, for example, C2-Cloalkylene, especially C2-C8alkylene. An especially preferred definition of R2 is, for example, C4-Caalkylene, especially C4-CISalkylene, for example hexamethylene.

C4-Cl2alkylene interrupted by oxygen or sulfur can be interrupted one or more times and is, for example, -CH2-0-CH2CH2-0-CHz-, -CH2-(O-CH2CH2-)20CH2-, -CH2-(O-CH2CH2-)30-CH2-, -CH2-(O-CH2CH2-)40-CH2-, -CH2CH2-0-CH2CH20-CH2CH2-or -CH2CH2-S-CH2CH2-. A preferred definition of R2 is, for example,C4-Cloalkylene interrupted by oxygen or sulfur, especiallyC4C8alkylene interrupted by oxygen or sulfur, for example C4-Cralkylene interrupted by oxygen or sulfur. An especially preferred meaning of R2 iSCH2CH2-0-CH2CH2-0-CH2CH2-or -CH2CH2-S-CH2CH2-- CH:F1 Alkanetetrayl having 4 to 10 carbon atoms is, for example,;-CHi-- CH2 (pentaerythriM), 1 1 2 1 1 um - Uri CHi- CHI--- CH - CH - urli-- 1 1 1 1 or -CHi--CHI--CH-CH-CHi-CHi-- ' -CHi--umi-uri-urli-um-umi-CHiPentaerythrityl is preferred.

Component (d) may also comprise mixtures of different sterically hindered phenols of the formula VI.

Compositions which are of interest include those comprising as component (d) at least one compound of the formula V1 in which, if n is 1, R2 is ClC2oalkyl.

Preference is given to compositions comprising as component (d) at least one compound of the formula V1 in which, if n is 2, R2 is C2-Csalkylene, C4-C8alkylene interrupted by oxygen or sulfur; or, if Y is -NH-, R2 is additionally a direct bond; and, if n is 4, R2 is C4-Caalkanetetrayl.

Preference is likewise given to compositions comprising as component (d) at least one compound of the formula V1 in which R, is methyl or tertbutyl, n is 1, 2 or 4, 11 X is -CHi.-CHi--C-Y- OXY5e-M YL.,.5,----ior -NH-; and, is r -i -- 0 if n is 1, R2 is C14-Claalkyl; and, if n is 2, R2 is CrCsalkylene, oriS C4-Cralkylene interrupted by oxygen; and if n is 4, R2 is C4-Cralkanetetrayl.

Likewise of interest are compositions comprising as component (d) at least one compound of the formula V1 in which the compound of the formula V1 is a compound of the formula Via to V1h H 3 C \,CH3 H 3C..I c - 0 11 HO CHi--CHI-k;-i-mrl-kCH 2)S_ H 3C / c 'I. CH3 H 3C H3C ,CH 3 H3C HO-CHi----CHi--(;-0-Cl.H 37 H3C - / c 1-1 CH 3 H3C 0 H3C 1.11 CH 3 H3C HO-CHi--CH:F-C-O-CF- H3C' c L H3C / CH3 H3C H3C,,C _,CH3 0 0 (Via), Irganox1098 -j 2 c -4 (Vib), Irganox1076 (Vlc), Irganox"1010 HO--- 11 (Vid), frganox245 :/)-CHI-CHI---U-O-CHi--CHi--0-CHi--- H 3 C -j 2 H3C\ c ',CH3 H3C.111 0 HOH3C --- C H3C / CH3 3 CH3 H3C HO -CH2 CHi-C-0-(CH2C H3C-, H3C / CH3 0 (Vie), Irganox259 - 2 -S 2 (Vif), Irganox1035 53 H3C c / CH3 1 CH 0 N 0 3 ly R3 = -CH2 OH (Vig), Irganox3114 R;" y R3 CH 0 c 1. 3 H3C \ CH3 R, H3C-\ c 1. CH3 V 0 CH3 0 N 0 11 c R 010H(Vlh), Irganox 3125.

3 = -(CH2),F-O-C-CH2- R3 CH y c 3 H3C \ CH3 Irganox1098, Irganox"11076, Irganox110110, Irganox245, Irganox&259, Irganox31114, Irga- nox1035 and Irganox"31125 are protected trade names of the company Ciba Spezialit5tenchemie AG.

Preference is given to compositions comprising as component (d) at least one compound of the formula VI in which the compound of the formula VI is a compound of the formula Via, Vlb, Vic or Vld, in particular a compound of the formula Via, Vib or Vic.

Component (d) of the novel composition, and the compounds of the formula VI, are known and in some cases obtainable commercially. Possible preparation processes for the compounds of the formula V1 can be found, for example, in the US Patents 3,330,859 or 3,960,928.

Compositions of interest include those comprising as component (e) at least one radical of the formula X11 or X111 CH3 G, G-CH2 G2 -N G-CH2" CH3 CH3 G, G-CH2-)4G2 -N N- (X111) G - C H2'. CH3 (X11) in which G is hydrogen or methyl, and G, and G2 are hydrogen, methyl or together are oxygen.

Of particular interest are compositions comprising as component (e) at least one compound from the group of the sterically hindered amines of the class of compounds described under (a) to (g), which comprise at least one radical of the formula X11 or X111.

(a) Compounds of the formula Xlia CH3 G, G-CH 2 Gl-N 0- G-CH2 CH 3 G12 (Xlia) - n in which n is a number from 1 to 4, G and G, independently of one another are hydrogen or methyl, G,, is hydrogen, U, hydroxyl, NO, -CH2CN, Cl- Clealkyl, C3-C8alkenyl, CrCealkynyl, C7-C12aralkyl, Cl-Clealkoxy, C5- Cacycloalkoxy, GrC9phenylalkoxy, Cl-Cealkanoyl, C3-Cr,alkenoyl, Cl- C18alkanoyloxy, benzyloxy, glycidyl or a group -CF42CH(OH)-Z, where G11 is preferably hydrogen,CI-C4alky], allyl, benzyl, acetyl or acryloyl, Z is hydrogen, methyl or phenyl, and, if n is 1, G12 is hydrogen, Cl-CIE; alkyl, which is uninterrupted or interrupted by one or more oxygen atoms, or is cyanoethyl, benzyi, glycidyi, a monovalent radical of an aliphatic, cycloaliphatic, araliphatic, unsaturated or aromatic carboxylic acid, carbamic acid or phosphorus-containing acid or a monovalent silyl radical, preferably a radical of an aliphatic carboxylic acid having 2 to 18 carbon atoms, of a cycloaliphatic carboxylic acid having 7 to 15 carbon atoms, of an (x,p-u nsatu rated carboxylic acid having 3 to 5 carbon atoms or of an aromatic carboxylic acid having 7 to 15 carbon atoms, it being possible for the carboxylic acid to be substituted in each case in the aliphatic, cycloaliphatic or aromatic moiety from 1 to 3 times by - COOZ12, Z12 is hydrogen, Cl-CMalkyl, C3-CI2alkenyl, C5-C7cycloalkyl, phenyl or benzyl, and, if n is 2, G12 is C2-C12al"ene, CCC12alkenylene, xylylene, a divalent radical of an aliphatic, cycloaliphatic, araliphatic or aromatic dicarboxylic acid, dicarbamic acid or phosphoruscontaining acid or a divalent silyl radical, preferably a radical of an aliphatic dicarboxylic acid having 2 to 36 carbon atoms, of a cycioaliphatic or aromatic dicarboxylic acid having 8 to 14 carbon atoms or of an aliphatic, cycloaliphatic or aromatic dicarbamic acid having 8 to 14 carbon atoms, it being possible for the dicarboxylic acid to be substituted in each case in the aliphatic, cycloaliphatic or aromatic moiety by 1 or 2 groups of -COOZ12, and, if n is 3, G12is a trivalent radical of an aliphatic, cycloaliphatic or aromatic tricarboxylic acid, which can be substituted in the aliphatic, cycloaliphatic or aromatic moiety by-COOZ12,of an aromatic tricarbamic acid or of a phosphorus-containing acid, or is a trivalent silyl radical, and, if n is 4, G12is a tetravalent radical of an aliphatic, cycloaliphatic or aromatic tetracarboxylic acid.

The carboxylic acid radicals indicated include in each case radicals of the formula (-CO),R, in which the meaning of n is indicated above and the meaning of R is evident from the definition stated.

Any Cl-CUalkyl substituents are, for example, methyl, ethyl, n-propyl, nbuty], sec-butyl, tertbutyl, n-hexyi, n-octyl, 2-ethyihexyi, n-nonyl, ndecyl, n-undecyl or n-dodecyl.

As Cl-C18alkyl G,, or G12 can be, for example, the groups indicated above and also, for example, n-tridecyl, n-tetradecyl, n-hexadecyl or noctadecyl.

If G,, is C3-Caalkenyl it can, for example, be 1-propenyl, allyl, methallyl, 2-butenyl, 2-pentenyl, 2-hexenyl, 2-octenyl or 4-tert-butyi-2buteny].

G,, asC3-Cealkynyl is preferably propargyl.

G, l as C7-C12aralkyl is especially phenethyl and in particular benzyi.

G,-, as Cl-C8alkanoyl is, for example, formyi, propionyl, butyryl, octanoy], but preferably acetyl and as C3-C5alkenoyl is especially acryloyl.

G12 as a monovalent radical of a carboxylic acid is, for example, an acetic, caproic, stearic, acrylic, methacrylic, benzoic or 6-(3,5-di-tertbutyl-4-hydroxyphenyi)propionic acid radical.

If G 12 is a monovalent sily] radical then it is, for example, a radical of the formula -(CjH2j)-Si(Z)2Zu in which j is an integer from the range from 2 to 5 and Z and Z' independently of one another areCI-C4alkyl orClC4alkoxy.

If G12 is a divalent radical of a dicarboxylic acid then it is, for example, a malonic, succinic, glutaric, adipic, suberic, sebacic, maleic, itaconic, phthalic, dibutyimajonic, dibenzyImalonic, butyi(3,5-di-tertbuty]-4-hydroxybenzyi)malonic or bicycloheptenedicarboxylic acid radical.

If G12 is a trivalent radical of a tricarboxylic acid then it is, for example, a trimellitic, citric or nitrilotriacetic acid radical.

If G12 is a tetravalent radical of a tetracarboxylic acid then it is, for example, the tetravalent radical of butane-1,2,3,4-tetracarboxylic acid or of pyromellitic acid.

If G12 is a divalent radical of a dicarbamic acid then it is, for example, a hexamethylenedicarbamic or a 2,4-tolylenedicarbamic acid radical.

Preference is given to compounds of the formula Xlia in which G is hydrogen, G,, is hydrogen or methyl, n is 2 and G12 is the diacyl radical of an aliphatic dicarboxylic acid having 4 to 12 carbon atoms.

Examples of polyalkylpiperidine compounds of this class are the following compounds:

1) 4-Hydroxy-2,2,6,6-tetramethylpiperidine 2) 1 -Ally]-4-hydroxy-2,2,6,6tetramethylpiperidine 3) 1-Benzyl-4-hydroxy-2,2,6,6-tetramethylpiperidine 4) 1-(4-tert-Butyl-2-butenyi)-4-hydroxy-2,2,6,6-tetramethylpiperidine 5) 4-Stearoyloxy-2,2,6,6-tetramethylpiperidine 6) 1-Ethyl-4-salicyloyloxy-2, 2,6,6-tetramethylpipeddine 7) 4-Methacryloyloxy-1,2,2,6,6pentamethylpipeddine 1,2,2,6,6-Pentamethylpiperidin-4-yI 13-(3,5-di-tert-butyi-4- hydroxyphenyi)propionate 9) Di(l-benzyi-2,2,6,6-tetramethylpipeddin-4-yi) maleate 10) Di(2,2,6,6-tetramethylpiperidin-4-yi) succinate 11) Di(2,2,6, 6-tetramethylpiperidin-4-yi) glutarate 12) Di(2,2,6,6tetramethylpiperidin-4-yi) adipate 13) Di(2,2,6,6-tetramethylpipeddin-4yl) sebacate 14) Di(1,2,2,6,6-pentamethylpiperidin-4-yl) sebacate 15) Di(1,2,3,6-tetramethy]-2,6-diethylpipeddin-4-yl) sebacate 16) Di(l -aiiyi-2,2,6,6-tetramethylpiperidin-4-yi) phthalate 17) 1Hydroxy-4-(3-cyanoethytoxy-2,2,6,6-tetramethylpiperidine 18) 1-Acetyl-2,2, 6,6-tetramethylpiperidin-4-yl acetate 19) Th(2,2,6,6tetramethylpiperidin4-yi) trimellitate 20) 1-Acryloyi-4-benzyloxy-2,2,6,6tetramethylpiperidine 21) Di(2,2,6,6-tetramethylpipeddin-4-yi) diethyimalonate 22) Di(1,2,2,6,6-pentamethylpiperidin-4-yi) dibutyimalonate 23) Di(1,2,2,6,6-pentamethylpipeddin-4-yi) butyl(3,5-ditert-butyl-4-hydroxybenzyi)malonate 24) Di(l-octyloxy-2,2,6,6tetramethylpiperidin-4-yl) sebacate 25) Di(l-cyclohexyloxy-2,2,6,6tetramethylpiperidin-4-yi) sebacate 26) Hexane-l',6-bis(4-carbamoyloxy-lnbutyl-2,2,6,6-tetramethylpiperidine) 27) Toluene-2',4'-bis(4carbamoyloxy-1 -n-propyl-2,2,6,6-tetramethylpipe ridine) 28) Dimethyibis(2,2,6,6-tetramethylpiperidin-4-oxy)silane 29) Phenyltris(2,2, 6,6-tetramethylpipeddin-4-oxy)silane 30) Tris(l -propyi-2,2,6,6tetramethylpiperidin-4-yi) phosphite 31) Tris(l-propyi-2,2,6,6tetramethylpiperidin-4-yi) phosphate 32) Phenyl [bis(1,2,2,6,6pentamethylpiperidin-4-yl)]phosphonate 33) 4-Hydroxy-1,2,2,6,6pentamethylpipeddine 34) 4-Hydroxy-N-hydroxyethyi-2,2,6,6tetramethylpiperidine 35) 4-Hydroxy-N-(2-hydroxypropyi)-2,2,6,6tetramethylpipefidine 36) 1-Glycidyi-4-hydroxy-2,2,6,6tetramethylpiperidine.

(U) Compounds of the formula Xlib CH3 G, G-CH2 G13 1 G l- N N- G-CH2 L CH in which n is the number 1 or 2, G, G, and G,, are as defined under (a'), -1 n G14 (Xlib) G13 is hydrogen, Cl-C12alky], C2-C5hydroxyalky], C5-07cycloalky], C7- Caaralky], C2-CI8alka- noy], C3-C5alkenoyl, benzoyl or a group of the formula CH3 G, G-CH2 GTI-N 1 G-CH ' 2.

CH3 and, if n is 1, G14is hydrogen, Cl-Clealkyl,C3-Csaikenyi, C5-C7cycloalkyl, orCl-C4alkyl substituted by a hydroxyl, cyano, alkoxycarbonyl or carbamide group; glycidyl, a group of the formula -CH2-CH(OH)-Z or of the formula -CONH-Z, in which Z is hydrogen, methyl or phenyl, and if n is 2, G14 is C2-C12alkylene, C6-C12arylene, xylylene, a -CH2-CH(OH)-CH2- group or a group -CH2-CH(OH)-CH2-0-D-0- in which D is C2-CloalWene, C6- C15arylene, C6-C12CYCloalkylene, or, provided that G 13 is not alkanoyf, alkenoyl or benzoyl, G14 can alternatively be 1 -oxoC2-C12alkylene, a divalent radical of an aliphatic, cycloaliphatic or aromatic dicarboxylic acid or dicarbamic acid or else can be the group -CO-, or, if n is 1, G13 and G14 together can be the divalent radical of an aliphatic, cycloaliphatic or aromatic 1,2- or 1,3-dicarboxylic acid.

Any Cl-C12- or Cl-Cisalkyl substituents are as already defined under (a).

Any C5-C7cycloalkyl substituents are, in particular, cyclohexyl.

G13 as C7-Caaralkyl is in particular phenylethyl or especially benzy]. As C2-C5hydroxyalkyl G13 is, in particular, 2-hydroxyethyl or 2hydroxypropyl.

G13 asC2-Claalkanoyl is, for example, propionyl, butyryl, octanoyf, dodecanoyl, hexadecanoyi, octadecanoyl, but preferably acetyl, and as C3Cralkenoyll is especially acryloyl.

If G14 is C2-C8alkenyl it is, for example, allyl, methallyl, 2-buteny], 2pentenyl, 2-hexenyl or 2-octenyl.

G14asCl-C4alkyl substituted by a hydroxyl, cyano, alkoxycarbonyl or carbamide group can, for example, be 2-hydroxyethyl, 2-hydroxypropyl, 2cyanoethyl, methoxycarbonlmethy], 2-ethoxycarbonyl ethyl, 2aminocarbonylpropyl or 2-(dimethylaminocarbonyi)ethyi.

Any C2-C12alkylene substituents are, for example, ethylene, propylene, 2, 2-dimethylpropylene, tetramethylene, hexamethylene, octamethylene, decamethylene or dodecamethylene.

Any C6-C15arylene substituents are, for example, o-, m- or p-phenylene, 1, 4-naphthylene or 4,4'-diphenylene.

As C6-C12CYCloalkylene particular mention may be made of cyclohexylene.

Preference is given to compounds of the formula lb in which n is 1 or 2, G is hydrogen, G, l is hydrogen or methyl, G13 is hydrogen, Cl-C12alkyl or agroup of the formula CH3 G, G-CH2 Gi-1N N G-CH2 CH3 and G14. if n=l, is hydrogen or Cl-C12alkyl and, if n=2, is C2-Cealkylene or 1-OXO-C2-Cealkylene.

37) N,N'-Bis(2,2,6,6-tetramethylpiperidin-4-yi)hexamethylene-1,6-diamine 38) N,N-Bis(2,2,6,6-tetramethylpiperidin-4-yl)hexamethylene-1,6diacetamide 39) Bis(2,2,6,6-tetramethylpipeddin-4-yl)amine 40) 4Benzoylamino-2,2,6,6-tetramethylpiperidine 41) N,N'-Bis(2,2,6,6tetramethylpiperidin-4-yl)-N,N'-dibutyladipamide 42) N,N'-Bis(2,2,6,6-tetramethylpiperidin-4-yi)-N,N'-dicyclohexyl-2hydroxypro pylene1,3-diamine 43) N,N'-Bis(2,2,6,6-tetramethylpiperidin-4-yi)-p-xylyienediamine 44) N, N'-Bis(2,2,6,6-tetramethylpiperidin-4-yi)succinamide 45) Di(2,2,6,6tetramethylpipeddin-4-yi) N-(2,2,6,6-tetramethylpiperidin-4-yl)-13-aminodipropionate 46) The compound of the formula CH3 H3C n-C4H. OH CH3 H3C-N N-CHI---CH-CH1-0 H3C CH 3 C[13 j 2 47) 4-(Bis-2-hydroxyethylamino)-1,2,2,6,6-pentamethylpiperidine 48) 4-(3Methyl-4-hydroxy-5-tert-butylbenzamido)-2,2,6,6-tetramethylpiperidine 49) 4-Methacrylamido-1,2,2,6,6-pentamethylpipeddine (c) Compounds of the formula Xlic CH3 G, G-CH2 Gl-N G-CH.., 2 L_ CH3 1- G (Xlic) -" 15 n in which n is the number 1 or 2, G, G, and G,, are as defined under (a), and, if n is 1, G15 is C2-C8alkylene or C2-Cghydroxyalkylene or C4C22acyloxyalkylene, and, if n is 2, G15is the group (-CH2)2C(CH2-)2- If G15 is C2-C8alkylene or C2-Cshydroxyalkylene then it is, for example, ethylene, 1-methyl- ethylene, propylene, 2-ethylpropylene or 2-ethyi-2-hydroxymethylpropylene.

G15 asC4-C22acyloxyalkylene is, for example, 2-ethyi-2acetoxymethylpropylene.

50) 9-Aza-8,8,10,10-tetramethy]-1,5-dioxaspiro[5.5]undecane 51) 9-Aza-8,8,10,10-tetramethyi-3-ethyl-1,5-dioxaspiro[5.5]undecane 52) 8-Aza-2,7,7,8,9,9-hexamethyi-1,4-dioxaspiro[4.5]decane 53) 9-Aza-3-hydroxymethyi-3-ethyi-8,8,9,10,10-pentamethyl-1,5dioxaspiro[5.5]u ndecane 54) 9-Aza-3-ethyi-3-acetoxymethyi-9-acetyi-8,8,10,10-tetramethyi-1,5dioxaspir o[5.5]unde- cane 55) 2,2,6,6-Tetram ethyl piperidine-4-spi ro-2'-(1',3-dioxane)-5'-spi ro- T-(-1 ",30-dioxane)-2nspiro-4"'-(2",2'N,6"',6'-tetramethylpiperidine).

(d') Compounds of the formulae X11d, X1le and Xlif, with compounds of the formula Xlif being preferred CH G16 0 3 G, 1 G-CH2 N-C G;-1-N 1 C-N G-CH2 13 (Xlid) G17 T1 CH3 G, G-CH2 O-C---T2 G;j-N 1 N-C\\ G-CH ' 1 CH3 H 0 (Xlie) T CH3 G, 1 G-CH2 0-k;---T2 Gi-IN 1 G-CH2 C"3 1 (Xli -G17 n in which n is the number 1 or 2, G, G, and G,, are as defined under (a), G16 is hydrogen, C,-C12alkyl, allyl, benzyl, glycidyl or C2-C6alkoxyalkyl, and, if n is 1, G17is hydrogen,CI-C12alkyi,C3-C5a[kenyi, C7-C9aralkyl, Cs-C7cycloalkyi,C2-C4hydroxyalkyl, C2-C6alkoxyalkyl, C6-Cloaryl, glycidyl or a group of the formula -(CHAP-COO-Q or of the formula -(CH2)P-O-CO-Qin which p is 1 or 2 andQiS Cl-C4alkyl or phenyl, and, if n is 2, G17 is C2C12alkylene, C4-C12alkenylene, C6-C12arylene, a group -CH2-CH(OH)-CH2-0-DO-CH2-CH(OH)-CH2- in which D is C2-Cloalkylene, C6-Cisarylene, C6C12CYCloalkylene, or a group -CH2CH(OZ')CH2-(OCH2-CH(OZ')CH2)2- in which Z is hydrogen, Cl-C18alky], allyl, benzyl, C12-C12alkanoyl or benzoyl, T1 and T2 independently of one another are hydrogen, Cl-C18alkyl or unsubstituted or haloor Cl-C4alkyl-substituted C6-Cl(pryl or C7-C9aralkyl or T1 and T2, together with the carbon atom to which they are attached, form a C5-Cl4CYCloalkane ring.

Any Cl-C12alkyl substituents are, for example, methyl, ethyl, n-propyl, nbutyl, sec-butyl, tertbutyl, n-hexyf, n-octyi, 2-ethyihexyi, n-nonyi, ndecyi, n-undecyl or n-dodecy].

Any substituents in the meaning of Cl-C18alkyl can, for example, be the groups listed above and also, for example, n-tridecyl, n-tetradecyl, nhexadecyl or n-octadecyl.

Any C2-C6alkoxyalkyl substituents are, for example, methoxymethyl, ethoxymethyi, propoxymethyl, tert-butoxymethyl, ethoxyethyl, ethoxypropyl, n-butoxyethyl, tert-butoxyethyl, isopropoxyethyl or propoxypropyl.

6 If G17 is C3-C5alkenyl then it is, for example, 1 -propenyl, allyl, methallyl, 2-butenyi or 2-pentenyl.

G17, T1 and T2as C7-C9araikyl are, in particular, phenethyl or especially benzyi. If T1 and T2 together with the carbon atom form a cycloalkane ring then this can, for example, be a cyclo pentane, cyclohexane, cyclooctane or cyclododecane ring.

If G17 is C2-134hydroxyalkyl then it is, for example, 2-hydroxyethyl, 2hydroxypropyl, 2-hydroxybutyi or 4-hydroxybutyl.

G17, T1 and T2 as Cc,-Cloaryl are, in particular, phenyl, a- or 6naphthyl which are unsubstituted or substituted by halogen or Cl-CAlkyl.

If G17 is C2-C12alkylene then it is, for example, ethylene, propylene, 2, 2-dimethylpropylene, tetramethylene, hexamethylene, octamethylene, decamethylene or dodecam ethylene.

G17as C4-C,2alkenylene is, in particular, 2-butenylene, 2-pentenylene or 3-hexenylene.

If G17 is C6-C12arylene then it is, for example, o-, m- or p-phenylene, 1, 4-naphthylene or 4,4'-diphenylene.

If ZiS C2-CI2alkanoyl then it is, for example, propionyl, butyryl, octanoyl, dodecanoyl, but preferably acetyl.

D as C2-Cloalkylene, CrC15arylene or C6-C12cycloalkylene is as defined under (U).

56) 3-Benzyi-1,3,8-tdaza-7,7,9,9-tetramethyispiro[4.5]decane-2,4-dione 57) 3-n-Octyl-1,3,8-tdaza-7,7,9,9-tetramethyispiro[4.5]decane-2,4-dione 58) 3-Aliyl-1,3,8-triaza-1,7,7,9,9-pentamethyispiro[4.5]decane-2,4-dione 59) 3-Glycidyi-1,3,8-triaza-7,7,8,9,9-pentamethyispiro[4.5]decane-2,4- dione 60) 1,3,7,7,8,9,9-Heptamethyi-1,3,8-tfiazaspiro[4.5]decane-2,4- dione 61) 2-isopropyi-7,7,9,9-tetramethyi-1 -oxa-3,8-diaza-4-oxospiro[4. 5]decane 1; 62) 2,2-Dibuty]-7,7,9,9-tetramethyi-l-oxa-3,8-diaza-4-oxospiro[4.5]decane 63) 2,2,4,4-Tetramethyi-7-oxa-3,20-diaza-21-oxodispiro[5.1.11. 2]heneicosane 64) 2-Butyi-7,7,9,9-tetram ethyl- 1-oxa-4,8-diaza-3-oxospiro[4.5]decane and preferably:

65) 8-Acetyl-3-dodecyf-1,3,8-triaza-7,7,9,9-tetramethyispiro[4.5]decane-2, 4-dion e or the compounds of the following formulae:

CH3 H 0 H 3C N-C H3C-bN< OH 1 1 c 4-CHi-ut-i-ur-1F-O-CH 66) L CH-OH H3C 11 CH3 v -1 CH 3 H 0 H3C N-C H3C-N < H3C CH3 67) CHI-CHi-CH2 - 2 CH3 H 0 H3C ' 1 < N-C C-N H3C 3 68) -CH2 2 CH H2 C,(CH2)g 3 k H 3C 0_ --,CH2 H-N 4-CH2CH2CO0C12H2, H 3 C CH3 (e') Compounds of the formula Xlig, which in turn are preferred G18 N'N z, G G N 20 19 L n (Xlig) in which n is the number 1 or 2 and Gis is a group of one of the formulae CH3 G, G-CH2 G11 N (A)-E- or GI-CH', 2 CH 3 in which G and G,, are as defined under (a), G, and G2are hydrogen, methyl or together are a substituent =Q E is -0- or -NG13-, A is C2-C6alkylene or -(CH2)3-0-, x is the number 0 or 1, G13 is hydrogen, Cl-CUalkyl, C2-Cshydroxyalkyl or Cs-C7cycloalkyl, CH3 G, G-CH2--G2 G;-1N "% N-(A) X G - CH2""T CH3 G19 is the same as G18 or is one of the group -NG21G22, -OG23, -NI- ICH2OG23 or M(C1-120G23)2, G20y if n = 1, is the same as G 1,3 or G19 and, if n = 2, G20 is a group - E-B-E-, in which B is C2-Caalkylene or C2-C8alkylene which is interrupted by 1 or 2 groups -N(G21)-, G21 is Cl-C12alkYl, cyclohexy], benzyi or ClC4hydroxyalkyl or a group of the formula CH3 G, G-CH 2 1 Gi-j-:N G-CH2 CH3 or a group of the formula 3 CH3 H3C Nj.'N CH3 G-lN N-G11 H n-C4H.

3C CH3 nK;4t1, CH 3 CH3 CH G22 is Cl-C12alkyl, cyclohexyl, benzy] orCI-C4hydroxyalkyl, or G21 and G22 together are C4-Qsalkylene or C4-C5oxaalkylene, for example -CH2CH2OCH2CH2- or a group of the formula -CH2CH2N(Gll)CH2CH2-, and G23 is hydrogen, Cl-C12alkyl or phenyl.

Any Cl-C12alkyl substituents are, for example, methyl, ethyl, n-propyl, nbutyl, sec-butyl, tertbuty], n-hexyi, n-octy], 2-ethyihexyi, n-nonyl, ndecy], n-undecyl or n-dodecyl.

Any C2-Cshydroxyalkyl substituents are, for example, 2-hydroxyethyi, 2hydroxypropyl, 3-hydroxypropy], 2-hydroxybutyl or 4-hydroxybutyl.

If A is C2-CraIlkylene then it is, for example, ethylene, propylene, 2,2dimethylpropylene, tetramethylene or hexamethylene.

If G21 and G22 together are C4-C5alkylene or oxaalkylene then this is, for example, tetra- methylene, pentamethylene or 3-oxapentamethylene.

Examples of polyalkylpiperidine compounds of this class are the compounds of the following formulae:

70) 71) 72) CH3 N(CH2CHI H3C N N H3C-N -N.-N(CH.CH J2 H 3C CH3 n-t;4M.

CH3 H3C N N N(n-C4111 CH 3 CH3 CH3CHi-N N---[N"- N-C N-CH2CH3 H3C CH3 C2H5 U2H5 CH3 CH3 CH3 HN H3C H3C-N Hc 3 CH3 CH3 CH3 (CH2):-0--- N-CH3 CH3 CH3 1 N-H H CH3 CH3 N-CH CH3 CH3 74) 75) CH3 H 3C CH CH3 CH:p-CH-( N-H 1 2 HN CH3 CH 3 H-N CHI--CH:i--N---1N"N-H 1 H 3C CH3 H CH3 CH3 CH3 utii-CH2-( N-H CH3 CH3 RNHCH2CH2,, N _, CH2CH.NHR CH3 H3C Nj.'N CH 3 H-N N N- N-H H Hq 3C CH3 n-C4H. n-U4l. CH 3 CH3 CH3 CH3 H3C Nj"N CH3 R = H-N - N----1 L- N ---C N - H H C n H 3 CH3 n-C4m. -;4"9 CH 3 CH 3 R 1 R 1 R-NH-(CH2)i--N-(CH2)i--N-(CH2)j-NH-R R has the same meaning as in compound 74.

76) 77) R' R, 1 1 W- NH - (CH2k- N - (CH2)i-- N - (CH2C NH - R' CH3 CH3 H3C N N CH3 R, = H3C-N - N N- N-CH3 H3C H3 n-;-;4H. n-CH. CH3 CH3 CH3 R' R' CH3 1 1 1 1 R-N-(CH2)i-N-(CH 2):p-- N - (CH2k- N - R' R' has the same meaning as in compound 76.

78) HN-CH-CH-CH 2 2 2 CH3 CH3 H3C NJ:"N CH3 H -N N- N-H H n-C H L 3C CH3 n C.PiV 8 17 CH3 CH3 j 2 79) 80) CH3 CH3 H3C CH2CH20H H C 1 CH3 3 N H3C CH3 N-n-C4H.

H3C Nj"N CH3 HOCH 2CHi--N N N- N-CH 2CH 20H H n-C H 3C CH3 n L;4M9 4 9 CH3 CH3 CH:j-CH=CH2 H C 1 CH3 3 N H3C CH3 N-n-C 4H 9 CH3 N ".L N CH3 H2C=CH-CH2-N -N N--- N-CH-CH=CH 2 2 -C4H9 CH3 H3C CH3 n-C4H. n 9 CH3 CH3 (f) Oligomeric or polymeric compounds whose structural repeating unit contains a 2,2,6,6- tetraalkylpiperidine radical, especially polyesters, polyethers, polyamides, polyamines, polyurethanes, polyureas, polyaminotriazines, poly(meth)acrylates, poly(meth)acrylamides and copolymers thereof which include such radicals.

Examples of 2,2,6,6-polyalkylpipeddine compounds of this class are the compounds of the following formulae, in which m is a number from 2 to about 200.

81) 82) 83) 84) CH3 CH 3 0- N-CHi-CHi---0-C-CHi-CHi-C- CH 3 CH3 CH 3 CH3 0- N - 0 11 0 11 0 11 N-CHi-CHrO-C-(CH2)Z-C- CH3 CH3 _j m m CH 3 CH 2CH3 NH- N-CHi-CH:p-CH:p-NH-C--[:::::-C- I-C CH2CH3 H3C CH 3 0 0 11 11 CH3 CH3 1 1 HN-C-CHi-C-CH3 1 N:k N Cl H3 --1'Z:'N J-N-(CH2)i--N H3C CH3 H3C - CH3 N N H3C 1 CH3 H3C 1 CH3 H H - m m 85) 86) 87) OH H 3 C CH3 H 3C N CH3 1 H CH3 CH3 m H 3C CH3 0 n-C H. 0 1 1 14 11 OK N-CHi-CH=CH-CHi-N -0-C-C-C 1 CH3 CH3 H3C CH. n-U4M.

CH3 H3C N,H r13 n 'H CH -C4 9 3 CH3 N N --N-(CH2)i- N- -"' 'N H3C CH3 N H3C 1 CH3 H _i m H3C 4N, CH3 H3C 1 CH3 H -3 m 1 88) 89) 90) 91) CH3 CH3 CH3 H3C -0 N-CH--O-CHi-N O-C-(CH 2)4 C- N, 2 q - CH3 CH3 H3C CH3 CH 3 CH 3 0 CH 0 12 5 11 N-CHi-CHI-O-C-C-C- 1 CH 3 U2P15 CH3 CH3 I Cmi-- C; I,f 0.1e c " 0 H3C CH H3C N CH3 I Um 3 CH 3 1 Cpli-ly 1 C6H13,, N looluz 0 H 3C CH 3 N H 3C 1 CH3 CH3 3 - m i m 0 0 11 11 - m _j m 92) 93) 94) 95) 0 N N.5,k N N L-N-(CH2) j-N H3C4 CH3 H3C N CH3 1 H H3 c CH 3 N CH H3C 1 3 H -N-(CH2)C-N-(CH2)2 H3 C CH3 H 3C N CH 3 1 H m H3C CH3 N HP' 1 CH 3 H 0 11 i m -N-(CH2)j-N-C-CH2 C- H3C 4K 1 CH3 H3C N CH3 1 H R 1 H3C - CH3 N H3C 1 CH3 H R 1 L ', X-2li-N-(CH2) im CH3 J1, CH3 H3C N ' N CH3 in which R is a radical of the formula H-N N N N-H or H n 3C H3 -U4P19 is a chain branch R 1 - (CH AF- N - - m.

0 to 200, with the proviso that m'+ W' = m.

n-C4H. CH 3 CH 3 m' and W' are each an integer from the range from Further examples of polymeric compounds are reaction products of compounds of the for- mula CH3 HA' (CH2)q e f H3C O_C,-CH2 H-N < 4H H3C CH3 with epichlorohydrin; polyesters of butane- 1,2,3,4-tetracarboxylic acid with a bifunctional alcohol of the formula CH3 0 0 CH3 1 - 1 X.1 1 HOCHI-L; CH CH-C-CH 20H 1 X 1 1 CH 3 0 0 Ur13 whose carboxyl side chains originating from the tetracarboxylic acid are esterified with 2,2,6,6-tetramethyi-4-hydroxypiperidine; compounds of the formula CH3 in which about a third of the radicals R are -CM and k;U2k;t3 UU2H_ m CH3 CH3 the others are N-H and m is a number from the range from 2 to 200; or CH3 CH 3 copolymers whose repeating unit is composed of two units 0 N each case one unit 0 0 and one unit f N i U13r127 H3C CH3 H 3C N CH3 1 H (g') Compounds of the formula X111a CH3 0 G-CH2 Gi-IN G - C H2'.

- CH3 CH3 1 - and in O-C CH2 N-GU (X111a) in which n is a number 1 or 2 and in which G and G,, are as defined under (a) and G14 is as defined under (b), the meanings -CONH-Z and -CH2-CH(O1- 1)-CH2-0-D-0- being excluded for G14.

Examples of such compounds are:

CH3 0 H3C CH3 A CH3 H-N N-CHi-CHI-N N-H H3C- --(-CH3 CH3 0 CH3 100) CH3 0 H3C H3C-N N-CHi-CHi--N N-CH3 H3C - CH3 CH 3 0 CH 3 CH3 A-' CH3 101) CH3 0 H3C # H C-N N CHI-G 3 H3C- 2 CH3 102) Of particular interest are compositions comprising as component (e) at least one compound of the formula H1, H2, H3, H4, H5, H6 and H7 CH3 CH3 H3C 0 0 'CH3 11 11 H17C80-tN.-0-C-(CH2)i-C-0- N N-OC8H17 (H1) TinuVin123 CH3 CH3 H3C CH3 (CHIC CH3 n-C H. 0 CH 14 11 3 H010-CHI-C-C-0- N-CH3 (CHIC CH3 CH3 H3C CH3 H 3 C-N H3 c CH3 0 CH3 0 CH3 O-C-(CH2)i-C-O- N-CH3 CH3 CH3 2 CH3 CH3 0 0 11 11 --0- N-CH-CH-O-C-CH,-CHI-C- 2 2 CH3 CH3 CH3 CH3 1 1 le HN-C-CHi-C-CH 3 1 1 N':LN CH3 CH3 N L-N-(CH2)j-N H3C CH3 H3CCH3 N AN, H3C 1 CH3 H 3C j CH3 H H R, R' 1 1 R'-NH-(CH2)i-N-(CH2):i--N-(CH2)i-NH-R' (H2) Tinuvin144 (H3) Tinuvin292 (H4) Tinuvin622 - m - m (H5) Chimassorb944 (H6) ChimassoCi 19, CH3 CH3 H3 c Nj.'N CH3 R = H3C-N N N N-CH 3 H n-CH.

3C CH3 n-U4rl. CH3 CH3 HN-CH.CH20H Nj.'N n-C4Hi---N------, N --N-n-C4H.

H3C CH3 H3 4. CH3 N N H3C 1 CH3 3C 1 CH3 U U f in which m is a number from the range from 2 to 200.

(H7) I Component (e) of the novel composition, or the compounds of the sterically hindered amine type, are known and some are commercially available.

Tinuvinl 23, Tinuvin11 44, Tinuvin292, Tinuvin622, Chimassorb944 und Chimassor61 19 are protected trade names of Ciba Spezialitffienchemie AG.

As component (e) of the novel composition particular preference is given to the addition of those sterically hindered amines whose molecular weight or average molecular weight M, is in the range f rom 500 to 10 000, in particular in the range f rom 1000 to 10 000. Of these, particular emphasis should again be placed on those sterically hindered amines whose molecular weight or average molecular weight Mn is in the range from 1500 to 10 000, for example in the range from 2000 to 7500.

Particular emphasis should be given to those novel compositions which as component (e) comprise two or more compounds of the sterically hindered amine type.

The mixture of components (b), (c), (d) und (e) is suitable for stabilizing organic materials against oxidative, thermal or light-induced degradation. Examples of such materials are:

1. Polymers of monoolefins and diolefins, for example polypropylene, polyisobutylene, polybut-i-ene, poly-4-methylpent-l-ene, polyisoprene or polybutadiene, as well as polymers of cycloolefins, for instance of cyclopentene or norbornene, polyethylene (which optionally can be crosslinked), for example high density polyethylene (HDPE), high density and high molecular weight polyethylene (HDPE-HMW), high density and ultrahigh molecular weight polyethylene (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE), (VLDPE) and (ULDPE).

Polyolefins, i.e. the polymers of monoolefins exemplified in the preceding paragraph, preferably polyethylene and polypropylene, can be prepared by different, and especially by the following, methods:

A a) radical polymerisation (normally under high pressure and at elevated temperature).

b) catalytic polymerisation using a catalyst that normally contains one or more than one metal of groups lVb, Vb, Vlb or V111 of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and/or aryls that may be either 1E- or a-coordinated. These metal complexes may be in the free form or fixed on substrates, typically on activated magnesium chloride, titanium(III) chloride, alumina or silicon oxide. These catalysts may be soluble or insoluble in the polymerisation medium. The catalysts can be used by themselves in the polymerisafion or further activators may be used, typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alWoxanes, said metals being elements of groups la, Ila and/or Ilia of the Periodic Table. The activators may be modified conveniently with further ester, ether, amine or silyl ether groups. These catalyst systems are usually termed Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC).

2. Mixtures of the polymers mentioned under 1), for example mixtures of polypropylene with polyisobutylene, polypropylene with polyethylene (for example PP/HDPE, PP/LDPE) and mixtures of different types of polyethylene (for example LDPE/HDPE).

3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers, for example ethylene/propylene copolymers, linear low density polyethylene (LLDPE) and mixtures thereof with low density polyethylene (LDPE), propylene/but-l-ene copolymers, propylenelisobutylene copolymers, ethylene/but-l-ene copolymers, ethylene/hexene copolymers, ethylene/methylpentene copolymers, ethylene/heptene copolymers, ethylene/octene copolymers, propylene/butadiene copolymers, isobutylene/isoprene copolymers, ethylene/alkyl acrylate copolymers, ethylene/alkyl methacrylate copolymers, ethylene/vinyl acetate copolymers and their copolymers with carbon monoxide or ethylene/acrylic acid copolymers and their salts (ionomers) as well as terpolymers of ethylene with propylene and a diene such as hexadiene, dicyclopentadiene or ethylidene-norbomene; and mixtures of such copolymers with one another and with polymers mentioned in 1) above, for example polypropylene/ethylene-propylene copolymers, LDPE/ethylene-vinyl acetate copolymers (EVA), LDPE/ethylene-acrylic acid copolymers (EAA), LLDPE/EVA, LLDPE/EAA and alternating or random polyalkylene/carbon monoxide copolymers and mixtures thereof with other polymers, for example polyamides.

4. Hydrocarbon resins (for example C5-C9) including hydrogenated modifications thereof (e.g. tackifiers) and mixtures of polyalkylenes and starch.

5. Polystyrene, poly(p-methyistyrene), poly((x-methyistyrene).

6. Copolymers of styrene or a-methylstyrene with dienes or acrylic derivatives, for example styrene/butadiene, styrene/acrylonitrile, styrene/alkyl methacrylate, styrene/butadiene/alkyl acrylate, styrene/butadiene/alkyl methacrylate, styrene/maleic anhydride, styrene/acrylonitrile/methyl acrylate; mixtures of high impact strength of styrene Copolymers and another polymer, for example a polyacrylate, a diene polymer or an ethylene/propylene/diene terpolymer; and block copolymers of styrene such as styrene/butadiene/styrene, styrene/isoprene/styrene, styrene/ethylene/butylene/styrene or styrene/ethyleneipropylene/ styrene.

7. Graft copolymers of styrene or (x-methylstyrene, for example styrene on polybutadiene, styrene on polybutadiene-styrene or polybutadieneacrylonitrile copolymers; styrene and acrylonitrile (or methacrylonitrile) on polybutadiene; styrene, acrylonitrile and methyl methacrylate on polybutadiene; styrene and maleic anhydride on polybutadiene; styrene, acrylonitrile and maleic anhydride or maleimide on polybutadiene; styrene and maleimide on polybutadiene; styrene and alkyl acrylates or methacrylates on polybutadiene; styrene and acrylonitrile on ethylene/propylene/diene terpolymers; styrene and acrylonitrile on polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile on acrylate/butadiene copolymers, as well as mixtures thereof with the copolymers listed under 6), for example the copolymer mixtures known as ABS, MBS, ASA or AES polymers.

8. Halogen-containing polymers such as polychloroprene, chlorinated rubbers, chlorinated and brominated copolymer of isobutylene-isoprene (halobutyl rubber), chlorinated or sulfochlorinated polyethylene, copolymers of ethylene and chlorinated ethylene, epichlorohydrin homo- and copolymers, especially polymers of halogen-containing vinyl compounds, for example polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride, polyvinylidene fluoride, as well as copolymers thereof such as vinyl chloridefvinylidene chloride, vinyl chloride/vinyl acetate or vinylidene chlo(ide/vinyl acetate copolymers.

9. Polymers derived from (x, P-unsatu rated acids and derivatives thereof such as polyacrylates and polymethacrylates; polymethyl methacrylates, polyacrylamides and polyacrylonitriles, impact-modified with butyl acrylate.

10. Copolymers of the monomers mentioned under 9) with each other or with other unsaturated monomers, for example acrylonitrile/ butadiene copolymers, acrylonitrile/alkyl acrylate copolymers, acrylonitrile/alkoxyalkyl acrylate or acrylonitrile/vinyl halide copolymers or acrylonitrile/ alkyl methacrylate/butadiene terpolymers.

11. Polymers derived from unsaturated alcohols and amines or the acyl derivatives or acetals thereof, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl stearate, polyvinyl benzoate, polyvinyl maleate, polyvinyl butyral, polyallyl phthalate or polyallyl melamine; as well as their copolymers with olefins mentioned in 1) above.

12. Homopolymers and copolymers of cyclic ethers such as polyalkylene glycols, polyethylene oxide, polypropylene oxide or copolymers thereof with bisglycidyl ethers.

13. Polyacetals such as polyoxymethylene and those polyoxymethylenes which contain ethylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acrylates or MBS.

14. Polyphenylene oxides and sulfides, and mixtures of polyphenylene oxides with styrene polymers or polyamides.

15. Polyurethanes derived from hydroxyl-terminated polyethers, polyesters or polybutadienes on the one hand and aliphatic or aromatic polyisocyanates on the other, as well as precursors thereof.

16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and/or from aminocarboxylic acids or the corresponding lactams, for example polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, polyamide,2 1, polyamide 12, aromatic polyamides starting from mxylene diamine and adipic acid; polyamides prepared from hexamethylenediamine and isophthalic or/and terephthalic acid and with or without an elastomer as modifier, for example poly-2,4,4,trimethylhexamethylene terephthalamide or polym-phenylene isophthalamide; and also block copolymers of the aforementioned polyamides with polyolefins, olefin copolymers, ionomers or chemically bonded or grafted elastomers; or with polyethers, e.g. with polyethylene glycol, polypropylene glycol or polytetramethylene glycol; as well as polyamides or copolyamides modified with EPDM or ABS; and polyamides condensed during processing (RIM polyamide systems).

17. Polyureas, polyimides, polyamide-imides, polyetherimids, polyesterimids, polyhydantoins and polybenzimidazoles.

18. Polyesters derived from dicarboxylic acids and diols and/or from hydroxycarboxylic acids or the corresponding lactones, for example polyethylene terephthalate, polybutylene terephthalate, poly-1,4dimethylolcyclohexane terephthalate and polyhydroxybenzoates, as well as block copolyether esters derived from hydroxyl-terminated polyethers; and also polyesters modified with polycarbonates or MBS.

19. Polycarbonates and polyester carbonates.

20. Polysulfones, polyether sulfones and polyether ketones.

21. Crosslinked polymers derived from aldehydes on the one hand and phenols, ureas and meiamines on the other hand, such as phenol/formaldehyde resins, urea/formaldehyde resins and melaminelformaldehyde resins.

22. Drying and non-drying alkyd resins.

23. Unsaturated polyester resins derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also halogen-containing modifications thereof of low flammability.

24. Crosslinkable acrylic resins derived from substituted acrylates, for example epoxy acrylates, urethane acrylates or polyester acrylates.

25. Alkyd resins, Polyester resins and acrylate resins crosslinked with melamine resins, urea resins, isocyanates, isocyanurates, polyisocyanates or epoxy resins.

26. Crosslinked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds, e.g. products of diglycidyl ethers of bisphenol A and bisphenoll F, which are crosslinked with customary hardeners such as anhydrides or amines, with or without accelerators.

27. Natural polymers such as cellulose, rubber, gelatin and chemically modified homologous derivatives thereof, for example cellulose acetates, cellulose propionates and ceilulose butyrates, or the cellulose ethers such as methyl cellulose; as well as rosins and their derivatives.

28. Blends of the aforementioned polymers (polybiends), for example PP/EPDM, Polyamide/EPDM or ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA, PC/PBT, PVC/CPE, PVC/acrylates, POWthermoplastic PUR, PC/thermoplastic PUR, P0Wacrylate, POWMBS, PPO/HIPS, PPO/PA 6.6 and copolymers, PA/HIDPIE, PAIPP, PAIPPO, PBT/PC/ABS or PBT/PET/PC.

29. Naturally occurring and synthetic organic materials which are pure monomeric compounds or mixtures of such compounds, for example mineral oils, animal and vegetable fats, oil and waxes, or oils, fats and waxes based on synthetic esters (e.g. phthalates, adipates, phosphates or trimellitates) and also mixtures of synthetic esters with mineral oils in any weight ratios, typically those used as spinning compositions, as well as aqueous emulsions of such materials.

30. Aqueous emulsions of natural or synthetic rubber, e.g. natural latex or latices of carboxylated styrene/butadiene copolymers.

The mixture of components (b), (c), (d) and (e) is likewise used for polyurethane production, especially for preparing flexible polyurethane foams. In this context the novel compositions and the products produced therefrom are effectively protected against degradation. In particular, scorching during foam production is avoided.

The polyurethanes are obtained, for example, by reacting polyethers, polyesters and polybutadienes which contain terminal hydroxyl groups with aliphatic or aromatic polyisocyanates.

Polyethers having terminal hydroxyl groups are known and are prepared, for example, by polymerizing epoxides such as ethylene oxide, propylene oxide, butylene oxide, tetrahydrofuran, styrene oxide or epichlorohydrin with themselves, for example in the presence of BF3, or by addition reaction of these epoxides, alone or as a mixture or in succession, with starting components containing reactive hydrogen atoms, such as water, alcohols, ammonia or amines, for example ethyiene glycol, propylene 1,3- and 1,2-glycol, trimethylolpropane, 4,4'dihydroxydiphenylpropane, aniline, ethanolamine or ethylenediamine. Sucrose polyethers are also suitable in accordance with the invention. In many cases preference is given to those polyethers which predominantly (up to 90% by weight, based on all the OH groups present in the polyether) contain primary OH groups. Furthermore, polyethers modified by vinyl polymers, as are formed, for example, by polymerizing styrene and acrylonitrile in the presence of polyethers, are suitable, as are polybutadienes containing OH groups.

These compounds generally have molecular weights of 400-10000 and are polyhydroxy compounds, especially compounds containing from two to eight hydroxyl groups, especially those of molecular weight from 800 to 10 000, preferably from 1000 to 6000, for example polyethers containing at least 2, generally 2 to 8, but preferably 2 to 4, hydroxyl groups, as are known per se for the preparation of homogeneous polyurethanes and cellular polyurethanes. It is of course possible to employ mixtures of the above compounds

containing at least two isocyanate-reactive hydrogen atoms, in particular with a molecular weight of 400 - 10 000.

Suitable polyisocyanates are aliphatic, cycloaliphatic, araliphatic, aromatic and heterocyclic polyisocyanates, for example ethylene diisocyanate, 1,4-tetramethylene diisocyanate, 1,6hexamethylene diisocyanate, 1,12-dodecane diisocyanate, cyclobutane 1,3-diisocyanate, cyclohexane 1,3- and -1,4-diisocyanate and also any desired mixtures of these isomers, 1isocyanato-3,3,5-trimethyl-5-isocyanatomethylcyclohexane, 2,4- and 2,6-hexahydrotolylene diisocyanate and also any desired mixtures of these isomers, hexahydro-1,3- and/or -1,4phenylene diisocyanate, perhydro-2,4'- and/or -4,4'-diPhenylmethanediisocyanate, 1,3- and 1,4phenylene diisocyanate, 2,4- and 2,6-tolylene diisocyanate, and also any desired mixtures of these isomers, diphenylmethane 2,4'- and/or -4,4diisocyanate, naphthylene 1,5diisocyanate, triphenylmethane 4,4',4"triisocyanate, polyphenyl-polymethylene polyisocyanates as are obtained by aniline-formaldehyde condensation followed by phosgenization, mand pisocyanatophenylsulfonyl isocyanates, perchlorinated aryl polyisocyanates, polyisocyanates containing carbodfimide groups, polyisocyanates containing allophanate groups, polyisocyanates; containing isocyanurate groups, polyisocyanates containing urethane groups, polyisocyanates containing acylated urea groups, polyisocyanates containing biuret groups, polyisocyanates; containing ester groups, reaction products of the abovementioned isocyanates with acetals, and polyisocyanates containing polymeric fatty acid radicals.

1-1 is also possible to employ the isocyanate group-containing distillation residues, as they are or dissolved in one or more of the abovementioned polyisocyanates, which are obtained in the course of the industrial preparation of isocyanates. It is additionally possible to use any desired mixtures of the abovementioned polyisocyanates.

Particular preference is given in general to the polyisocyanates which are readily obtainable industrially, for example 2,4- and 2,6-tolylene diisocyanate and any desired mixtures of these isomers ("TDI"), polyphenyl-polymethylene-polyisocyanates as prepared by anilineformalclehyde condensation followed by phosgenization ("crude MlDlu), and polyisocyanates containing carbodiimide, urethane, allophanate, isocyanurate, urea or biuret groups ("modified polyisocyanates").

The organic materials to be protected are preferably natural, semisynthetic or preferably synthetic polymers. Particular preference is given to thermoplastic polymers, especially polyolefins, in particular polyethylene and polypropylene or copolymers thereof with mono- and diolefins.

Particular emphasis is to be placed on the action of the novel compounds against thermal and oxidative degradation, especially under thermal stress as occurs during the processing of thermoplastics. The novel components (b), (c), (d) and (e) are therefore outstandingly suitable for use as processing (in-process) stabilizers.

e The mixture of components (b), (c), (d) and (e) is also suitable for stabilizing polyolefins which are in long-term contact with extracting media.

Component (b) is preferably added to the organic material to be stabilized in an amount of from 0.0005 to 5%, in particular from 0.001 to 2%, for example from 0.01 to 2%, based on the weight of the organic material to be stabilized.

Components (c), (d) and (e) are judiciously added to the organic material to be stabilized in an amount of from 0.01 to 10%, for example from 0.01 to 5%, preferably from 0.025 to 3% and, in particular, from 0.025 to 1%, based on the weight of the organic material to be stabilized.

In addition to components (a), (b), (c), (d) and (e) the novel compositions may comprise further costabilizers (additives) the following, for example:

* 1. Antioxidants 1.1. Alkylated monophenols, for example 2,6-di-tert-buty]-4-methylphenol, 2-tert-butyi-4,6-dimethylphenol, 2,6-di-tert-buty]-4-ethylphenol, 2,6-di- tert-buty]-4-n-butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6- dicyclopentyi-4-methylphenol, 2-(a-methylcyclohexyi)-4,6-dim ethylphenol, 2,6-dioctadecyi-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-tertbutyl-4methoxymethylphenol, nonylphenols which are linear or branched in the side chains, for example, 2,6-di-nony]-4-methylphenol, 2,4-dimethy]-6(1'-methylundec-l'-yi)phenol, 2,4-dimethyi-6-(1'-methylheptadec-l'yi)phenol, 2,4-dimethyi-6-(1'-methyitridec-l'-y1)phenol and mixtures thereof.

1.2. Aikvithiomethviphenots, for example 2,4-dioctyfthiomethyi-6-tertbutylphenol, 2,4-dioctyithiomethyi-6-methylphenol, 2,4-dioctylthiomethyi6-ethylphenol, 2,6-di-dodecyithiomethyl4-nonylphenol.

1.3. Hydroguinones and alkylated hydroguinones, for example 2,6-di-tertbutyi-4-methoxyphenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tertamyihydroq ui none, 2,6-diphenyi-4-octadecyloxyphenol, 2,6-di-tertbutylhydroquinone, 2,5-di-tert-butyi-4-hydroxyanisole, 3,5-di-tertbutyl-4hydroxyanisole, 3,5-di-tert-butyi-4-hydroxyphonyl stearate, bis-(3,5-ditert-buty]-4hydroxyphenyi) adipate.

1.4. Tocopherol, for example a-tocopherol, P-tocopherol, -f-tocopherol, 8tocopherol and mixtures thereof (Vitamin E).

1.5. HydroXylated thiodir)henvl ethers, for example 2,2'-thiobis(6-tertbutyl-4-methylphenol), 2,2'-thiobis(4-octylphenol), 4,4'-thiobis(6-tertbutyl-3-methylphenol), 4,4'-thiobis(6-tert-butyl2-methylphenol), 4,4thiobis-(3,6-di-sec-amylphenol), 4,4-bis(2,6-dimethyl-4hydroxyphenyl)disulfide.

1.6. A1k3didenebisphenols, for example 2,2'-methylenebis(6-tert-butyl-4methylphenol), 2,2'methylenebis(6-tert-butyl-4-ethylphenol), 2,2'methylenebis[4-methyi-6-(a-methylcyclohexyt)phenol], 2,2'-methylenebis(4methyi-6-cyclohexylphenol), 2,2-methvienebis(6-nonyf-4-methylphenol), 2,2methylenebis(4,6-di-tert-butylphenol), 2,2'-ethylidenebis(4,6-di-tertbutyiphenol), 2,2'-ethylidenebis(6-tert-buty]-4-isobutylphenol), 2,2'methylenebis[6-(ct-methyibenzyi)-4-nonylphenoll, 2,2'-methylenebis[6-(a, (x-dimethyibenzyi)-4-nonylphenol], 4,4'-methylenobis(2,6-di-tert-butylphenol), 4,4'-methylenebis(6-tert-butyi-2methylpheno1),1,1-bis(5- tert-butyi-4-hydroxy-2-methylph enyi) butane, 2,6-bis(3-tert-butyi-5- methyi-2-hydroxybenzyl)-4methylphenol, 1,1,3-tris(S-tert-butyi-4-hydroxy- 2-methylphenyi)butane, 1,1-bis(5-tert-butyl-4hydroxy-2-methyl-phenyi)-3-n- dodecyimercaptobutane, ethylene glycol bis[3,3-bis(3'-tertbutyi-4'- hydroxyphenyi)butyrate], bis(3-tert-butyi-4-hydroxy-5-methyi- phenyi)dipyclopentadiene, bis[2-(3'-tert-butyi-2'-hydroxy-5'methylbenzyi)-6-tert-butyl-4-methylphenyi]terephthalate, 1,1 -bis-(3,5dimethyi-2-hydroxyphenyi)butane, 2,2-bis-(3,5-di-tert-butyi-4hydroxyphenyl)propane, 2,2-bis-(5-tert-butyi-4-hydroxy2-methylphenyl)-4-ndodecyimercaptobutane, 1,1,5,5-tetra-(5-tert-butyi-4-hydroxy-2methylphenyi)pentane.

1.7. 0-, N- and S-benZyi compounds, for example 3,5,3',5'-tetra-tertbutyl-4,4'-dihydroxydibenzyl ether, octadecy]-4-hydroxy-3,5dimethyibenzyimercaptoacetate,tridecyi-4-hydroxy3,5-di-tertbutyibenzyimercaptoacetate, tris(3,5-di-tert-butyi-4-hydroxybenzyi)amine, bis(4tert-butyi-3-hydroxy-2,6-dimethyibenzyi)dithioterephthalate, bis(3,5di-tert-butyi-4-hydroxybenzyi)suifide, isoocty]-3,5-di-tert-butyi-4hydroxybenzyimercaptoacetate.

1.8. Hydroxvbenzviated malonates, for example dioctadecyi-2,2-bis-(3,5-ditert-butyi-2-hydroxybenzyl)-malonate, di-octadecyi-2(3-tert-buty]-4hydroxy-5-methyibenzyi)-malonate, didodecyimercaptoethyi-2,2-bis-(3,5-ditert-butyi-4-hydroxybenzyl)malonate, bis[4-(1,1,3,3tetramethyibutyl)phenyl]-2,2-bis(3,5-di-tert-butyi-4-hydroxyb enzyi)malonate.

1.9. Aromatic hydroxvbengyl compounds, for example 1,3,5-tris-(3,5-ditert-butyi-4-hydroxybenzyi)-2,4,6-trimethyibenzene, 1,4-bis(3,5-di-tertbutyl-4-hydroxybenzyi)-2,3,5,6-tetramethylbenzene, 2,4,6-tds(3,5-di:-te rt-butyl-4-hydroxybenzyi) phenol.

1.10. Triazine Compounds, for example 2,4-bis(octyimercapto)-6-(3,5-ditert-butyi-4-hydroxyanilino)-11,3,5-triazine, 2-octyimercapto-4,6-bis(3,5di-tert-buty]-4-hydroxyanilino)-1,3,5-triazine, 2-octyimercapto-4,6-bis(3, 5-di-tert-buty]-4-hydroxyphenoxy)-1,3,5-triazine, 2,4,6-tris(3,5-di-tertbutyi-4-hydroxyphenoxy)-1,2,3-triazine, 1,3,5-tris-(3,5-di-tert-butyi-4hydroxybenzyi)isocyanu rate, 1,3,5-tris(4-tert-butyl-3-hydroxy-2,6dimethylbenzyi)isocyanurate, 2,4,6-tris(3,5-di-tert-butyl-4hydroxyphenylethyi)-1,3,5-tdazine, 1,3,5-tris(3,5-di-tert-butyl-4hydroxyphenylpropionyi)-hexahydro-1,3,5-triazine, 1,3,5-tris(3,5dicyclohexyi-4-hydroxybenzyl)isocyanurate.

1.11. Bengylphosphonates, for example dim ethyi-2,5-di-tert-butyl-4hydroxybenzylp hosphonate, diethyi-3,5-di-tert-butyl-4hydroxybenzyiphosphonate, dioctadecyl3,5-di-tert-butyi-4hydroxybenzylphosphonate, dioctadecyi-5-tert-buty]-4-hydroxy-3methyibenzyiphosphonate, the calcium salt of the monoethyl ester of 3,5di-tert-butyi-4-hydroxybenzyiphosphonic acid.

1.12. Apútaminophenols, for example 4-hydroxylauranilide, 4hydroxystearanilide, octyl N(3,5-di-tert-butyi-4-hydroxyphenyi)carbamate.

1.13. Esters of 8-(3.5-di-tert-bulyl-4-hydroL(yr)henyl)propionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3thiapentadecanol, trim ethylhexanediol, trimethylolpropane, 4hydroxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octane.

1.14. Esters of 6-(5-tert-bubLI-4-hydroxv-3-methvir)henvl)r)ror)ionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, noctan'bl, i-octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'bis(hydroxyethyl)oxamide, 3- thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2. 2]octane.

1.15. Esters of B-(3.5-dicvclohexvi-4-hydroxvr)henyl)r)ror)ionic acid with mono- or polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tds(hydroxyethyl)isocyanurate, N,N'bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethy!-1 -phosplia-2,6, 7-trioxabicyclo[2.2.2]octane.

1.16. Esters of 3.5-di-tert-butvl-4-hydroNyphenyI acetic acid with monoor polyhydric alcohols, e.g. with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'bis(hydroxyethyl)ox- amide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyM -phospha-2,6,7-trioxabicyclo[2.2. 2]octane.

1.17. Amides of D-(3.5-di-tert-butvl-4-hvdroL(yl2henyl)prol2ionic acid e. g. N,N-bis(3,5-di-tertbutyl-4-hydroxyphenylpropionyl)hexamethylenediamide, N,N'-bis(3,5-di-tert-buty1-4-hydroxyphenylpropionyl)trimethylenediamide, N,N'-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)T hydrazide, N,N'bis[2-(3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyloxy)ethyl]oxamide (NaugardoXL-1 supplied by Uniroyal).

1.18. Ascorbic acid (vitamin C) 1.19. Aminic antioxidants, for example N,N'-di-isopropyl-p- phenylenediamine, N,N'-di-secbutyl-p-phenylenediamine, N,N'-bis(1,4dimethylpentyl)-p-phenyienediamine, N,N'-bis(lethyl-3-methylpentyl)-pphenylenediamine, N,N'-bis(l -methylheptyl)-p-phenylenediamine, N,N'dicyclohexyl-p-phenytenediamine, N,N'-diphenyi-p-phenylenediamine, N,N'bis(2-naphthyl)-p-phenylenediamine, N-isopropyl-N'-phenyi-pphenylenediamine, N-(1,3-dimethylbutyl)N'-phenyi-p-phenylenediamine, N-(lmethylheptyl)-N-phenyl-p-phenylenediamine, N-cyclohe-N'-phenyi-pphenienediamine, 4-(p-toluenesulfamoyl)diphenylamine, N,N'-dimethylN,N'di-sec-butyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4isopropoxydiphenylamine, N-phenyl-l-naphthylamine, N-(4-tert-octylphenyl)l-naphthyiamine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example p,p'-di-tert-octyidiphenylamine, 4n-butylarninophenol, 4butyrylaminophenol, 4-nonanoylaminophenol, 4-dodecanoylaminophenol, 4octadecanoylaminophenol, bis(4-methoxyphenyl)amine, 2,6-di-tert-butyl-4dimethylaminomethylphenol, 2,4'-diaminodiphenylmethane, 4,4'diaminodiphenylmethane, N,N,N',N'-tetramethyl-4,4'-diaminodiphenylmethane, 1,2-bis[(2-methylphenyl)amino]ethane, 1,2-bis(phenylamino)propane, (otolyl)biguanicle, bis[4-(l',3'-dimethylbutyl)phenyl]amine, tertoctylated N-phenyl-l-naphthylamine, a mixture of mono- and dialkylated tertbutyl/tertoctyldiphenylamines, a mixture of mono- and dialkylated nonyldiphenylamines, a mixture of mono- and dialkylated dodecyidiphenyiamines, a mixture of mono- and dialkylated isopropyl/isohexyldiphenylamines, a mixture of mono- und dialkylated tertbutyldiphenylamines, 2,3-dihydro-3,3-dimethyl-4H-1,4-benzothiazine, phenothiazine, a mixture of mono- und dialkylated tert-butyVtertoctylphenothiazines, a mixture of mono- und dialkylated tert-octylphenothiazines, N-allylphenothiazin, N,N,N',N'-tetraphenyl-1,4-diaminobut2-ene, N,N-bis- - 72 (2,2,6,6-tetramethyi-piperid-4-yi-hexamethylenediamine, bis(2,2,6,6tetramethyipiperid-4-yl)sebacate, 2,2,6,6-tetramethylpipeddin-4-one, 2,2, 6,6-tetramethylpiperidin-4-ol.

2. UV absorbers and light stabilisers 2.1. 2-(2'-Hy_droxvphenyl)benzotriazoles, for example 2-(2'-hydroxy-5'methylphenyl)-benzotriazole, 2-(3',5'-di-tert-butyl-2'hydroxyphenyl)benzotriazole, 2-(5'-tert-butyl-2hydroxyphenyl)benzotriazole, 2-(2'-hydroxy-5-(1,1,3,3tetramethylbutyl)phenyl)benzotdazole, 2-(3,5'-ditert-butyl-2'hydroxyphenyl)-5-chloro-benzotdazole, 2-(3'-tert-butyl- 2-hydroxy-5'methylphenyl)-5-chloro-benzotriazole, 2-(3'-sec-butyl-5'-tert-butyl-2'hydroxyphenyl)benzotriazole, 2-(2'hydroxy-4'-octyloxyphenyl)benzotriazole, 2-(3',5-di-tert-amyl-2'-hydroxyphenyI)benzotriazole, 2-(3',5'-bis-(cc,(xdimethylbenzyl)-2'-hydroxyphenyl)benzotriazole, 2-(3-tert-butyl-2'hydroxy5'-(2-octyioxycarbonylethyl)phenyl)-5-chloro-benzo triazole, 2-(3'tert-butyl-5'-[2-(2-ethylhexyloxy)-carbonylethyl]-2'-hydroxyphenyl)-5chloro-benzotdazole, 2-(3-tert-butyl-2'-hydroxy-5'(2methoxycarbonylethyl)phenyl)-5-chloro-benzotriazole, 2-(3'-tert-butyl2'-hydroxy-5'-(2-methoxycarbonylethyi)phenyl)benzotdazole, 2-(3'-tertbutyl-2-hydroxy-5-(2-octyloxycarbonylethyl)phenyl)benzotriazole, 2-(3'tert-butyl-5'-[2-(2-dthylhexyloxy)carbonylethyl]-2'hydroxyphenyl)benzotriazole, 2-(3'-dodecyl-2'-hydroxy-5'methylphenyl)benzotdazole, 2-(3'-tert-butyl2'-hydroxy-5'-(2isooctyloxycarbonylethyi)phenylbenzotriazol e, 2,2-methyIene-bis[4-(1,1,3, 3tetramethylbutyl)-6-benzotriazole-2-yiphenol]; the transesterification product of 2-[3-tert-butyl-5'-(2-methoxycarbonylethyl)-2-hydroxyphenyl]2H-benzotriazo le with polyethylene glycol 300; [R-CH2CHi-COO-CH2CH2-^ where R = 3'-tert-butyf-4'-hydroxy-5'-2H- benzotria2 zol-2-yiphenyl, 2-[2-hydroxy-3'-(cca-dimethyibenzyl)-5-(1,1,3,3tetramethytbutyi)-phenyllben - zotriazole; 2-[2-hydroxy-3'-(1,1,3,3-tetramethyibutyi)-5'-(a,adimethylbenzyi)-phenyi]b enzo- triazole.

2.2. 2-HvdroMd2enzophenones, for example the 4-hydroxy, 4-methoxy, 4octyloxy, 4-decyloxy, 4-dodecyloxy, 4-benzyloxy, 4,2',4'-trihydroxy and 2'-hydroxy-4,4'-dimethoxy derivatives.

2.3. Esters of substituted and unsubstituted benzoic acids, as for example 4-tertbutyl-phenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis(4-tert-butylben- zoyi) resorcinol, benzoyl resorcinol, 2,4-di-tert-butylphenyl 3,5-di-tert- butyf-4-hydroxybenzoate, hexadecyl 3,5-di-tert-buty]-4-hydroxybenzoate, octadecyl 3,5-di-tertbuty]-4-hydroxybenzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tertbutyi-4-hydroxybenzoate.

2.4. Acrylates, for example ethyl (x-cyano-p,p-diphenylacrylate, isooctyl a-cyano-p,p-diphenylacrylate, methyl (x-carbomethoxycinnamate, methyl acyano-p-methyl-p-methoxy-cinnamate, butyl (x-cyano-p-methyi-p-methoxycinnamate, methyl (x-carbomethoxy-p-methoxycinnamate and N-(pcarbomethoxy-o-cyanovinyi)-2-methylindoline.

2.5. Nickel compounds, for example nickel complexes of 2,2'-thio-bis-[4(1,1,3,3-tetramethylbutyl) phenol], such as the 1:1 or 1:2 complex, with or without additional ligands such as n-butylamine, triethanolamine or Ncyclohexyidiethanolamine, nickel dibutyidithiocarbamate, nickel salts of the monoalkyl esters, e.g. the methyl or ethyl ester, of 4-hydroxy-3,5-ditertbutylbenzylphosphonic acid, nickel complexes of ketoximes, e.g. of 2hydroxy-4-methylphenyl undecyiketoxime, nickel complexes of 1-phenyi-4lauroy]-5-hydroxypyrazole, with or without additional ligands.

4 2.6. Sterically hindered amines, for example bis(2',2,6,6-tetramethyl-4piperidyi)sebacate, bis(2,2,6,6-tetramethyi-4-piperidyl)succinate, bis(1,2,2,6,6-pentamethyi- 4-piperidyf)sebacate, bis(l -octyloxy-2,2,6,6-tetramethyi-4-pipeddyi)sebacate, bis(1,2,2,6,6pentamethy]-4-pi peridyl) n-butyi-3,5-di-tert-butyl-4-hydroxybenzyimalonate, the condensate of 11-(2-hydroxy ethyl)-2,2,6,6-tetramethyi-4-hydroxypiperidine and succinic acid, linear or cyclic condensates of N,N'-bis(2,2,6,6-tetramethy]-4-pipeddyi)hexamethylenediamine and 4tert-ocyamino-2,6 dichloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4piperidyl)nitrilotfiacetate, tetrakis(2,2,6,6 tetramethy]-4-piperidyi)-1,2,3,4-butane-tetracarboxylate, 1,1'-(1,2ethanediyi)-bis(3,3,5,5- tetramethylpiperazinone), 4-benzoyi-2,2,6,6-tetramethylpiperidine, 4- stearyloxy-2,2,6,6 tetramethylpiperidine, bis(1,2,2,6,6-pentamethylpipeddyi)-2-n-butyl-2-(2hydroxy-3,5-di-tert- butylbenzy1)malonate, 3-n-octyl-7,7,9,9-tetramethyi-1,3,8-triazaspiro[4. 5]decan-2,4-dione, bis(l -octyloxy-2,2,6,6-tetramethylpipeddyl)sebacate, bis(l -octyloxy-2,2, 6,6-tetrame thylpiperidyl)succinate, linear or cyclic condensates of N,N'-bis-(2,2,6, 6-tetramethy]-4-piperi- dyl)hexamethylenediamine and 4-morpholino-2,6-dichforo-1,3,5-tdazine, the condensate of 2-chloro-4,6-bis(4-n-butylamino-2,2,6,6-tetramethylpipeddyl)-1,3,5triazine and 1,2-bis(3 aminopropylamino)ethane, the condensate of 2-chloro-4,6-di-(4-n- butylamino-1,2,2,6,6-pentamethylpipe(idyi)-1,3,5-triazine and 1,2-bis-(3-aminopropylamino)ethane, 8-acetyl-3-dode cyl-7,7,9,9-tetramethyi-1,3,8-triazaspiro[4.5]decane-2,4-dione, 3-dodecyil-(2,2,6,6-tetrame- thyl-4-pipe(idyl)pyrrolidin-2,5-dione, 3-dodecyl-1 -(1,2,2,6,6- pentamethyl-4-piperidyl)pyrrolidine-2,5-dione, a mixture of 4- hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine, a condensation product of N, N'-bis(2,2,6,6-tetramethyl-4-piperidyl) hexam ethyl e nediam ine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine, a condensation product of 1,2-bis(3-aminopropylamino)ethane and 2,4,6trichloro-1,3,5-triazine as well as 4-butylamino-2,2,6,6tetramethylpiperidine (CAS Reg. No. [136504-96-6]); N-(2,2,6,6tetramethyl-4-piperidyl)-n-dodecylsuccinimid, N-(1,2,2,6,6-pentamethyl-4piperidyl)-n-dodecylsuccinimid, 2-undecyl7,7,9,9-tetramethyl-l-oxa-3,8diaza-4-oxo-spiro[4,5]decane, a reaction product of 7,7,9,9tetramethyl-2cycloundecyl-l-oxa-3,8-diaza-4-oxospiro [4,5]decane und epichlorohydrin, 1,1bis(1,2,2,6,6-pentamethyl-4-piperidyloxycarbonyi)-2-(4methoxyphenyl)et hene, N,N'-bisformyl-N,N'-bis(2,2,6,6-tetramethy"pipeddyl)hexamethylenediamine, diester of 4-methoxymethylene-malonic acid with 1,2,2,6,6-pentamethyl-4-hydroxypiperidine, poly[methylpropyl-3oxy-4(2,2,6,6-tetramethyl-4-pipeddyl)]siloxane, reaction product of maleic acid anhydride-aolefin-copolymer with 2,2,6,6-tetramethyl-4- aminopipe(idine or 1,2,2,6,6-pentamethyl-4aminopiperidine.

2.7. Oxamides, for example 4,4'-dioctyloxyoxanilide,,12,2'diethoxyoxanilide, 2,2'-dioctyloxy5,5'-di-tert-butoxanilide, 2,2'didodecyloxy-5,5'-di-tert-butoxanilide, 2-ethoxy-2'-ethyloxanilide, N,N'bis(3-dimethylaminopropyi)oxamide, 2-ethoxy-5-tert-butyl-2'-ethoxanilide and its mixture with 2-ethoxy-2-ethyi-5,4'-di-tert-butoxanilide, mixtures of o- and p-methoxy-disubstituted oxanilides and mixtures of o- and pethoxy-disubstituted oxanilides.

2.8. 2-(2-Hydroxvphenvi)-1.3.5-tdazines, for example 2,4,6-tris(2-hydroxy4-octyloxyphenyi)1,3,5-triazine, 2-(2-hydroxy-4-octyloxyphenyi)-4,6-bis(2, 4-dimethylphenyi)-1,3,5-triazine, 2(2,4-dihydroxyphenyl)-4,6-bis(2,4dimethyiphenyi)-1,3,5-triazine, 2,4-bis(2-hydroxy-4-propytoxyphenyi)-6-(2, 4-dimethylphenyi)-1,3,5-triazine, 2-(2-hydroxy-4-octyloxyphenyi)-4,6bis(4-methylphenyi)-1,3,5-triazine, 2-(2-hydroxy-4-dodecyloxyphenyl)-4,6bis(2,4-dimethylphenyi)-1,3,5-triazine, 2-(2-hydroxy-4-tddecyloxyphenyi)4,6-bis(2,4-dimethylphenyi)-1,3,5-tdazine, 2-[2-hydroxy-4-(2-hydroxy-3butyloxy-propoxy)phenyi]-4,6-bis(2,4-dimethyi) -1,3,5-triazine, 2-[2hydroxy-4-(2-hydroxy-3-octyloxy-propyloxy)phenyll-4,6-bis(2,4-dimethy l)1,3,5triazine, 2-[4-(dodecyloxy/tridecyloxy-2-hydroxypropoxy)-2-hydroxyphenyl]-4,6-bis(2,4-dimethylphenyl)-1,3,5-triazine, 2-[2-hydroxy-4-(2hydroxy-3-dodecyloxy-propoxy)phenyi]-4,6bis(2,4-dimethylphenyl)-,&,3,5tdazine, 2-(2-hydroxy-4-hexyloxy)phenyl-4,6-diphenyi-1,3,5triazine, 2-(2hydroxy-4-methoxyphenyi)-4,6-diphenyi-1,3,5-tdazine, 2,4,6-tris[2-hydroxy4-(3- butoxy-2-hydroxy-propoxy)phenyi]-1,3,5-triazine, 2-(2-hydroxyphenyi)-4-(4- methoxyphenyi)- 6-phenyi-1,3,5-triazine, 2-(2-hydroxy-4-[3-(2-ethyihexyi-1 -oxy)-2hydroxypropyioxy]phenyi}4,6-bis(2,4-dimethylphenyf)-1,3,5-triazine.

3. Metal deactivators, for example N,N'-diphenyloxamide, N-salicylai-N'salicyloyl hydrazine, N,Wbis(salicyloyl) hydrazine, N,N-bis(3,5-di-tert-butyi-4-, hydroxyphenylpropionyi) hydrazine, 3-salicyloylamino-1,2,4-triazole, bis(benzylidene)oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenyihydrazide, N,Wdiacetyladipoyl dihydrazide, N, Wbis(salicyloyl)oxalyl dihydrazide, N,N'-bis(salicyloyi)thiopropionyl dihydrazide.

4. Phosphites and Phosphonites, for example, triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris(nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, disteary] pentaerythritol diphosphite, ths(2,4-di-tert-butylphenyi) phosphite, diisodecyl pentaerythfitol diphosphite, bis(2,4-di-tert-butylphenyi) pentaerythritol diphosphite, bis(2,6-ditert-butyl-4-methylphenyi)-pentaerythdtof diphosphite, diisodecyloxypentaerythntol diphosphite, bis(2,4-di-tert-butyl-6- methylphenyi)pentaerythritol diphosphite, bis(2,4,6-tris(tert- butyiphenyi)pentaerythdtol diphosphite, tristearyl sorbitok triphosphite, tetrakis(2,4-di-tert-butyiphenyl) 4,4'-biphenylene diphosphonite, 6isooctyloxy-2,4,8,10-tetra-tert-butyi-12H-dibenz[d,g]-1,3,2dioxaphosphocin, 6-fluoro-2,4,8,10-tetra-tert-butyi-12-methyi-dibenz[d,g]1,3,2dioxaphosphocin, bis(2,4-di-tert-butyi-6-methylphenyi) methyl phosphite, bis(2,4-di-tert-butyi6-methylphenyl) ethyl phosphite, 2,2',2"nithio[triethyitris(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyi-2,2'diyi)phosphite], 2-ethyihexyi(3,3',5,5'-tetra-tert-butyi-1,1'-bipheny1-2, 2'-diyi)phosphite.

5. Hydrogylamines, for example, N,N-dibenzyihydroxylamine, N,Ndiethyihydroxylamine, N,N-diocMhydroxylamine, N,N-dilauryihydroxylamine, N,N- ditetradecyihydroxylamine, N,Ndihexadecylhydroxylamine, N,Nclioctadecylhydroxylamine, N-hexadecyi-N-octadecylhydroxylamine, Nheptadecyl-N-octadecylhydroxylamine, N,N-clialkylhydroxylamine derived from hydrogenated tallow amine.

6. Nitrones. for example, N-benzyi-alpha-phenyl-nitrone, N-ethyi-alphamethyi-nitrone, N-oc- tyl-alpha-heptyl-nitrone, N-lauryl-alpha-undecyl-nitrone, N-tetradecyl- alpha-tridcyi-nitrone, Nhexadecyi-alpha-pentadecyi-nitrone, N-octadecyialpha-heptadecyl-nitrone, Whexadecylalpha-heptadecyi-nitrone, Nocatadecyl-alpha-pentadecyi-nitrone, Wheptadecyl-alpha-heptadecyl-nitrone, N-octadecyi-alpha-hexadecyi-nitrone, nitrone derived from NM-dialkyMydroxylamine derived from hydrogenated tallow amine.

7. Thipsynergists, for example, dilaury] thiodipropionate or distearyl thiodipropionate.

8. Peroxide scavengers, for example esters of P-thiodipropionic acid, for example the lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or the zinc salt of 2-mercaptobenzimidazole, zinc dibutyidithiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis(pdodecyimercapto)propionate.

9. Polvamide stabilisers, for example, copper salts in combination with iodides and/or phosphorus compounds and salts of divalent manganese.

10. Basic co-stabilisers, for example, melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids for example calcium stearate, zinc stearate, magnesium behenate, magnesium stedate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate or zink pyrocatecholate.

11. Nucleating agents, for example, inorganic substances such as talcum, metal oxides such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates of, preferably, alkaline earth metals; organic compounds such as mono- or polycarboxylic acids and the salts thereof, e. g. 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymeric compounds such as ionic copolymers (ionomers).

12. Fillers and reinforcing agents, for example, calcium carbonate, silicates, glass fibres, glass bulbs, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite, wood flour and flours or fibers of other natural products, synthetic fibers.

13. Other additives, for example, plasticisers, lubricants, emulsifiers, pigments, rheology additives, catalysts, flow-control agents, optical brighteners, flameproofing agents, antistatic agents and blowing agents.

The costabilizers are added, for example, in concentrations of from 0.01 to 10%, based on the overall weight of the organic material to be stabilized.

The fillers and reinforcing agents (item 12 in the list), for example talc, calcium carbonate, mica or kaolin, are added to the polyolefin in concentrations, for example, of from 0.01 to 40%, based on the overall weight of the polyolefin to be stabilized.

The fillers and reinforcing agents (item 12 in the list), for example metal hydroxides, especially aluminium hydroxide or magnesium hydroxide, are added to the polyolefin in concentrations, for example, of from 0.01 to 60%, based on the overall weight of the polyolefin to be stabilized.

Carbon black as filler is added to the polyolefin in concentrations, judiciously, of from 0.01 to 5%, based on the overall weight of the polyolefin to be stabilized.

Glass fibers as reinforcing agents are added to the polyolefin in concentrations, judiciously, of from 0.01 to 20%, based on the overall weight of thp polyolefin to be stabilized.

Further preferred compositions comprise in addition to components (a) to (e) further additives as well, especially alkaline earth metal salts of higher fatty acids, for example calcium stearate.

As a conventional stabilizer combination for processing polymeric organic materials, for example polyolefins, to form corresponding mouldings, the combination of a phenolic antioxidant with a secondary antioxidant based on an organic phosphite or phosphonite is recornmended. Depending on the particular substrate and process, however, many polyolefin processors are forced to operate processes in the high-temperature range above about 28C1C. By virtue of the incorporation of a novel processing stabilizer mixture of components (b), (c), (d) and (e), which is especially suitable for high-temperature applications, in particular in the temperature range above 300%, industrial materials and mouldings, based for instance on high-density polyethylene, for example pipes and their technical variants (fittings), can be produced at a greater rate and with fewer rejects. Another advantage of this stabilizer mixture is that it can be employed in very small amounts. This leads to a reduction in the overall concentrationof antioxidant relative to conventional stabilizer mixtures. Thus the use of a low concentration of a stabilizer of the benzofuran-2-one type [component (b)l allows a reduction in the overall concentration of stabilizer by about a third in polyolefins, for example, which simultaneously represents an economic advantage.

The incorporation of components (b), (c), (d) and (e), and further additives if desired, into the polymeric, organic material is carried out by known methods, for example prior to or during shaping or else by applying the dissolved or dispersed stabilizer mixture to the polymeric organic material, with or without subsequent evaporation of the solvent. The stabilizer mixture of components (b), (c), (d) and (e) with or without further additives, can also be added in the form of a masterbatch, which contains these components in a concentration, for example, of from 2.5 to 25% by weight, to the materials that are to be stabilized.

The stabilizer mixture of components (b), (c), (d) and (e), with or without further additives, can also be added before or during polymerization or prior to crosslinking.

The stabilizer mixture of components (b), (c), (d) and (e), with or without further additives, can be incorporated in pure form or encapsulated in waxes, oils or polymers into the organic material that is to be stabilized.

The stabilizer mixture of components (b), (c), (d) and (e), with or Without further additives, can also be sprayed onto the polymer that is to be stabilized. It is able to dilute other additives (for example the conventional additives indicated above) or their melts so that they too can be sprayed together with these additives onto the polymer that is to be stabilized. Additon by spraying on during the deactivation of the polymerization catalysts is particularly advantageous, it being possible to carry out spraying using, for example, the steam used for deactivation.

In the case of spherically polymerized polyolefins it may, for example, be advantageous to apply the stabilizer mixture of components (b), (c), (d) and (e), with or without other addjfives, by spraying.

The materials stabilized in this way can be employed in a wide variety of forms, for example as films, fibres, tapes, moulding compositions, profiles or as binders for coating materials, especially powder coatings, adhesives or putties.

The polyolefins stabilized in this way can likewise be employed in a wide variety of forms, especially as thick-layer polyolefin mouldings which are in long-term contact with extractive media,, for example pipes for liquids or gases, films, geomembranes, strips, profiles or tanks.

The preferred thick-layer polyolefin mouldings have a layer thickness of from 1 to 50 mm, in particular from 1 to 30 mm, for example from 2 to 10 mm.

As already mentioned, the organic materials to be protected are preferably organic, especially synthetic, polymers. In this context, thermoplastic materials are protected with particular advantage. Attention should be drawn above all in this context to the outstanding activity of the novel stabilizer mixture of components (b), (c), (d) and (e) as in-process stabilizers (heat stabilizers). For this purpose they are advantageously added to the polymer prior to or during its processing. However, other polymers too (for example elastomers) or lubricants or hydraulic fluids can be stabilized against degradation, for example light- induced or thermooxidative degradation. Elastomers can be taken from the above listing of possible organic materials.

The lubricants and hydraulic fluids in question are based, for example, on mineral oils or synthetic oils or on mixtures thpreof. The lubricants are familiar to the skilled worker and are described in the relevant technical literature, for example. in Dieter Klamann, "Schmierstoffe und verwandte Proclukte" (Verlag Chemie, Weinheim, 1982), in Schewe-Kobek, "Das Schmiermittel-Taschenbuch" (Dr. Alfred HOthig-Verlag, Heidelberg, 1974) and in "Ullmanns EnzyklopAdie der technischen Chernie", Vol.13, pages 85-94 (Verlag Chemie, Weinheim, 1977).

A preferred embodiment of the present invention is therefore the use of components (b), (c), (d) and (e) as stabilizers, especially in-process stabilizers (thermal stabilizers), for organic materials, especially thermoplastic polymers, against oxidative, thermal or light-induced degradation.

The present invention also relates to a stabilizer mixture comprising (i) at least one compound of the benzofuran-2-one type, (ii) at least one compound from the group of the orga- nic phosphites or phosphonites, (iii) at least one compound from the group of the phenolic antioxidants, and (iv) at least one compound from the group of the sterically hindered amines.

Preference is also given to stabilizer mixtures in which the weight ratio of the components (i): (ii) (iii): (iv) is from 10: 1: 1: 0.1 to 0.01: 1: 10: 100, in particular from 5: 1: 1: 0.1 to 0.01 1: 1: 10.

The novel stabilizer mixture of components (b), (c), (d) and (e) features excellent stability to hydrolysis and advantageous colour behaviour, i.e. little discoloration of the organic material during processing.

Organic materials which are stabilized with the components of the present invention are particularly well protected against light-induced degradation.

The present invention also relates to a process for stabilizing an organic material against oxidative, thermal or light-induced degradation, whichAcompnses incorporating in or applying to said material at least one each of components (b), (c), (d) and (e).

Preference is given to a process for stabilizing polyolefins that are in long-term contact with extractive media, wherein the polyolefins are thick-layer polyolefin mouldings and have a layer thickness of from 1 to 50 mm, in particular from 1 to 30 mm, for example from 2 to 10 mm, which comprises incorporating in or applying to said polyolefins at least one each of components (b), (c), (d) and (e).

Also of particular interest is a process for stabilizing thick-layer polyolefin mouldings that are in long-term contact with extractive media, wherein the thick-layer polyolefin mouldings are pipes or geomembranes, which compdses incorporating in or applying to said mouldings at least one each of components (b), (c), (d) and (e).

The term geomembranes refers to films which are employed, for example, in landfill sites and are required to have a service life of up to 300 years.

Extractive media are, for example, liquid or gaseous inorganic or organic materials.

-81 Examples of gaseous inorganic materials are oxygen; nitrogen; oxides of nitrogen; for example NO, laughing gas or N02; oxides of sulfur, for example sulfur dioxide; halogens, for example fluorine or chlorine; Br6nstedt acids, for example hydrofluoric acid, hydrochloric acid, hydrobromic acid, hydroiodic acid or hydrocyanic acid; or bases, for example ammonia.

Examples of gaseous organic materials areCl-C4alkanes, for example methane, ethane, propane or butane; carbon monoxide; carbon dioxide; or phosgene.

Examples of liquid inorganic materials are water, chlorinated drinking water or aqueous salt solutions, for example sodium chloride solution (brine) or sodium sulfate solution; bromine; acid halides, e.g. titanium tetrachloride, thionyl chloride, nitrosyl chloride or trimethylsilyl chloride; alkalis, for example aqueous sodium hydroxide (NaOH), aqueous potassium hydroxide (KOH), aqueous ammonia solution, aqueous sodium bicarbonate solution or aqueous sodium carbonate solution.

Examples of liquid organic materials are organic solvents or liquid organic reagents.

Examples of organic solvents are aliphatic hydrocarbons, for example pentane, hexane, heptane, octane, petroleum spirit, nonane or decane; alcohols, for example methanol, ethanol, isopropanol, butanol, pentanol, amyl alcohol, cyclohexanol, pentaerythritol, ethylene glycol, ethylene diglycol, methylcellosolve, polyethylene glycol or glycerol; ketones, for example acetone, diethyl ketone, methyl ethyl ketone, diphenyl ketone or cyclohexanone; ethers, for example diethyl ether, dibutyl ether, tetrahydrofuran or dioxane; aromatic hydrocarbons, for example benzene, toluene or xylene; heterocyclic solvents, for example furan, pyridine, 2, 6lutidine or thiophene; dipolar aprotic solvents, for example dimethylformamide, diethylacetamide or acetonitrile; or surfactants.

For the purposes of the present invention, extractive media are also mixtures and solutions, especially aqueous mixtures, emulsions or solutions, of liquid or gaseous inorganic and organic materials as listed above.

Of particular interest are those extractive media which are important in the chemical industry or in landfill sites.

A preferred embodiment of the present invention is therefore also the use of a stabilizer mixture of components (b), (c), (d) and (e), with or without further additives, for improving the stability of polyolefins that are in long-term contact with extractive media.

The preferred components (b), (c), (d) and (e) for the use as stabilizers, the process for stabilizing and the stabilizer mixture are the same as those described for the compositions with an organic material.

The examples which follow illustrate the invention in more detail. Parts and percentages are by weight.

Example 1: Stabilizing polyethylene that is in long-term contact with water.

0.1% by weight of calcium stearate and the stabilizers listed in Table 1 are added dry to a polyethylene polymer (Hostaleno CRP 100; PE-HD) taken directly from the reactor, and the additives are incorporated in a Pappenmaier mixer (type 20) for two minutes (Examples la to 1 C).

Table 1:

Examples Stabilizers Amount (% by wt.) I rgafos1 68) 0.10 Example l aa) irgano)t1010d) 0.10 Chimassorb944e) 0.20 Verbindung (101) 0.05 Example l b b) Irgafos168c) 0.10 lrganok10100 0.05 Chimassorb9440) 0.20 Verbindung (101)l 0.05 Example lcb) Irgafos168c) 0.10 lrgano)cl 01 Od) 0.05 Chimassorb1 199) 0.20 a) Comparison example.

f) b) Example according to the invention. c) lrgafos"168(CibaSpezialitdtenchemieAG)isths(2,4-di-tert-butylphenyl) phosphite. d) Irganoke10110 (Ciba SpezialitAtenchemie AG) is the pentaerythritol ester of 3-(3,5-di-tertbutyi-4-hydroxyphenyi)propionic acid (compound of the formula Vic).

e) Chimassorb944 (Ciba SpezialitAtenchemie AG) denotes linear or cyclic condensation products prepared from N,N'-bis(2,2,6,6-tetramethyi-4piperidyl)hexamethylendiamine and 4-tert-octylamino-2,6-dichlor-1,3,5triazine [compound of the formula (H5)].

Compound (101) is a mixture of about 85 parts by weight of the compound of the formula Va and about 15 parts by weight of the compound of the formula Vb.

g) Chimassorb"1 19 (Ciba Spezialit,'Itenchemie AG) denotes condensation products prepared from 2-chloro-4,6-di-(4-n-butylamino-1,2,2,6,6pentamethylpiperidyi)-1,3,5triazine and 1,2-bis(3-aminopropylamino)ethane [compound of the formula (HQ.

Irgafos"168, Irganox01010, Chimassorb"944 and Chimassorb119 are protected trade names of the company Ciba SpezialitAtenchemie AG In a Schwabenthan extruder the stabilized polyethylene is homogenized at 220"C and is processed at 300"C to granules. For the extraction experiments in water, test sheets measuring 44 mm by 20 mm by 2 mm are pressed from the granules of the individual formulations (Examples la to 1c) using a bench press. To facilitate the demoulding of the test sheets, pressing is carried out between two aluminium foils.

The stabilizer extraction experiments were carried out with deionized water. The thermal conditioning of the extraction containers takes place in a convection oven from Heraeus (Hanau, Germany) with a maximum temperature deviation of 1.WC. For the extraction experiments below the boiling point of water, glass vessels are used. In the case of a water temperature of 105%, stainless steel pressure vessels are employed. Owing to the risk of oversaturation of the water with stabilizer, the amount of liquid for the experiments is fixed at about 400 mi for about 70 g of polymer and the water is replaced at regular intervals of time, specifically after each sampling, by fresh water.

The test sheets are exposed at 80% for 50 days to the experimental conditions described above. After the end of the extraction experiments, the residual stabilizer content and oxidation induction time (OIT) of the test sheets are measured.

The residual content of the stedcally hindered phenol, Irganox61010, is determined with the aid of an internal standard in a HPLC instrument of the type Spectra Physics SP 8800 with autosampler and UV/VIS detector of the type Spectra 200. The chromatography is carried out at room temperature with a column of the hyperchrome type 125 x 4.6 mm, packed with Nucleosil C 185 gm. The injection volume is 14 p] at a flow rate of 1.5 ml/minute. UV detection takes place at 270 nm.

The residual content of the triazine-containing sterically hindered amines, Chimassorb" 944 and Chimassorbel 19, is determined with a UV spectrometer of the Perkin Elmer Lambda 15 type by measuring the difference between the absorbances at 246.4 and 300 nm.

The oxidation induction time is determined by means of a "DuPont instrument 910 differential scanning calorimeter" from TA Instruments (Alzenau, Germany) and with a sample amount of from 5 to 10 mg, and describes the period of time, in minutes, under constant thermal stress (190OC/02) until complete decomposition of the polyethylene sample begins. The r longer the oxidation induction time, the better the stabilization of polyethylene and the more stable the polyethylene with respect to extracted water which is in long-term contact with the polyethylene.

The results show that the stability of polyolefins that are in long-term contact with extracted media is improved if the stabilizer mixture comprises a novel component (b), (c), (d) and (e). The results are summadzed in Table 2.

Table 2: Water storage for 50 days at 80 'C Footnotes a) to g) see Table 1.

Example 2: Stabilizing polypropylene in the case. of multiple extrusion and at especially high temperatures.

1.5 kg of polypropylene powder (Profaxe6501), which has been initially stabilized with 0.008% of Irganox1076 (compound of the formula Vlb) (with a melt index of 3.2 measured at 230"C and under 2.16 kg), are mixed with 0.10% of calcium stearate and 0.015 to 0.20% of the stabilizers listed in Table 3. This mixture is extruded in an extruder having a barrel diameter of 20 mm and a length of 400 mm at 100 revolutions per minute, the maximum extruder temperature being set at 280, 300, 320 and 340"C. For cooling, the extrudate is drawn through a water bath and then granulated. These granules are extruded repeatedly. After 5 extrusions, the melt index is measured (at 230"C under 2.16 kg). A large increase in the melt index denotes severe chain breakdown and hence poor stabilization. The results are summarized in Table 3. They show that the stability of polypropylene is improved if the stabilizer mixture comprises a novel component (b), (c), (d) and (e).

Example Stabilizer Residual stabilizer content after Oxidation induction time days at 8011C in minutes 0, 10% 1 rgafoS1 68c 1 a" 0, 10% Irganox1 010 d) 52% 34 0,20% Chimassorb944e) 57% 0,05% Compound (101)0 1b b) 0, 10% 1 rgafos1 68c) 38 0,05% lrganox1010d) 56% 0,20% Chimassorb944e) 71% 0,05% Compound (101) 1 Cb) 0, 10% 1 rgafoscl 68c) 39 0,05% Irganox1010d) 57% 0,20% Chimassoeh."9) 70% A"T 4 Table 3:

Example Stabilizers Amount Melt index (% by wt.) after 5 extrusions Irgafoscl 68c) 0.10 Example 2a a) lrganox1010'0 0.10 17.5 Chimassorb940 0.20 Compound (101) 0.015 Example 2b b) Irgafos1168c) 0.10 8.6 lrgano)il 01 od) 0.05 Chimassorb944") 0.10 Compound (101) 0.015 Example 2cM Irgafos1168c) 0.10 8.0 Irganox010100 0.05 Chimassorb1 191) 0.10 Footnotes a) to g) see Table 1 of Example 1.

Claims

WHAT IS CLAIMED IS:

1. A composition comprising a) an organic material which is subject to oxidative, thermal or light-induced degradation, b) at least one compound of the benzofuran-2-one type, c) at least one compound from the group of the organic phosphites or phosphonites, d) at least one compound from the group of the phenolic anboxidants, and e) at least one compound from the group of the sterically hindered amines.

2. A composition according to claim 1, comprising as component (b) a compound of the formula 1 0 0 R6 R2 1 F R5 L_ R4 J in which, if n is 1, R, (1) n R, is unsubstituted or Cl-C4alkyl-, Cl-CAlkoXY-, Cl-C4alkylthio-, hydroxyi-, halo-, amino-, Cl-C4a1Wamino-, phenylamino- or di(C1C4alkyi)amino-subsdtuted naphthyl, phenanthryl, anthry], 5,6,7,8tetrahydro-2-naphthy], 5,6,7,8-tetrahydro-1 -naphthyl, thienyl, benzo[blthienyl, naphtho[2,3-b]thienyl, thianthrenyl, dibenzofuryl, chromenyl, xanthenyl, phenoxathiinyi, pyrrolyl, imidazolyl, pyrazolyl, pyrazinyl, pydmidiny], pyridazinyl, indoliziny], isoindolyl, indolyl, indazolyl, purinyl, quinolizinyl, isoquinolyl, quinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, pteridinyl, carbazolyl, P-carboliny], phenanthridinyl, acridinyl, perimidinyl, phenanthrolinyl, phenazinyi, isothiazolyl, phenothiazinyf, isoxazoiyi, furazanyl, biphenyl, terphenyl, fluorenyl or phenoxazinyl, or R, is a radical of the formula 11 R9 R10 1 R#Rll R7 R 8 (11) and if n is 2, R, is unsubstituted or Cl-CAlky]- or hydroxyl-substituted phenylene or naphthylene; or is -R12-X-R13-P R2, R3, R4and R5 independently of one another are hydrogen, chlorine, hydroxyl,Cl-C25alkyi, C7-C9phenytalkyl, unsubstituted or Cl-C4alkyl- substituted phenyl; unsubstituted or Cl-C4alkylsubstituted C5- C8cycloalkyl; Cl-Claalkoxy, Cl-C18alkylthio, Cl-C4alkylamino, di(C1- C4alkyl)amino, Cl-C25alkanoyloxy, Cl-C25alkanoylarnino, C3- CA15alkenoyloxy, C3-C25alkanoyloxy which 1.11 is interrupted by oxygen, sulfur or / N-R14; C6-C9cycloalkylcarbonyloxy, benzoyloxy or Cl-C12alkyl-substituted benzoyloxy; or else the radicals R2 and R3 or the radicals R3 and R4 or the radicals R4 and Rs, together with the carbon atoms to which they are attached, form a benzo ring, R4is additionally - (CH2)p-COR,r, or -(CH2)q0H or, if R3, R5 and R6 are hydrogen, R4is additionally a radical of the formula Ill 0 0 H R2 5, t 1 R, c, RTr-, C - R1 7 1 in which R, is defined as indicated above for n = 1, IR,, is hydrogen or a radical of the formula IV 0 0 R2 1 R, R3 R6R1 (IV) R4 where R4 is not a radical of the form ula 111 and R 1 is defined as indicated above for n = 1, R7, Re, R9, R10 and IR,, independently of one another are hydrogen, halogen, hydroxyl, Cl-C25alkyl, C2-C25alkyl interrupted by oxygen, sulfur or N-R14; Cl- C25alkoxy, C2-C25alkoxy interrupted by oxygen, sulfur or N-R Cl-C25alkylthio, C3- C25alkenyl, C3-C25alkenyloxy, C3-C25alkynyl,C3-C25alkynyloxy, C7-CI)phenylalkyl, GrC9phenylalkoxy, unsubstituted or Cl-C4alkyl-substituted phenyl; unsubstituted or Cl-C4alkyl-substituted phenoxy; unsubstituted or ClC4alkyl-substituted Cs-Cicycloalkyl; unsubstituted or Cl-C4alkyl-substituted C5-Cacycloalkoxy; Cl-C4a1Warnino, di(C1-C4a1W)amino, ClC25alkanoyl, C3-C25aIkanoyI interrupted by oxygen, sulfur or N-RU; Cl-C2salkanoyloxy, C3-C25alka- noyloxy interrupted by oxygen, sulfur or N% N-R; Cl-C25alkanoylamino, C3- C25alkenoyl, 14 1 C3-C25alkenoyl interrupted by oxygen, sulfur or N-RU; C3-C25alkenoyloxy, C3-C25alke- noyloxy interrupted by oxygen, sulfur or N, N-R; C6-C9CYCloalkylcarbonyl, C6-Cgcyclo- 14 1 alkylcarbonyloxy, benzoyl or Cl-C12alkyl-substituted benzoyi; benzoyloxy orQ-C12alkyl-sub- R18 0 5 21 1 11 1 1 stituted benzoyloxy; -0-C-C-Rl. or or else, in formu- H h22 M19 ]a 11, the radicals R7 and R8 or the radicals R8 and IR,,, together with the carbon atoms to which they are attached, form a benzo ring, R12 and R13 independently of one another are unsubstituted or Cl-C4alkyl- substituted phenylene or naphthylene, R14 is hydrogen or Cl-Cealky], F11.5 is hydroxyl, 0- -L m Cl-C18alkoxyor -N / R24 I- r r+l '.. I R, 9 R16and R17independently of one another are hydrogen, CF3, Cl-C12alkyl or phenyl, or R16 and R17. together with the C atom to which they are attached, form a CS-Cecycloalkylidene ring which is unsubstituted or substituted from 1 to 3 times by Cl-CAlkyl; R18 and R19 independently of one another are hydrogen,CI-C4alkyl or phenyl, R20 is hydrogen or Cl- C4alkyl, R21 is hydrogen, unsubstituted or Cl-C4alkyi-substtuted phenyl; Cl-C25alkyl, C2-C25alkyl interrupted by oxygen, sulfur or N-R14; CrCgphenylalkyl which is unsubstituted or z substituted on the phenyl radical from 1 to 3 times by Cl-C4alkyl; GrC2Sphenylalkyl which is unsubstituted or substituted on the phenyl radical from 1 to 3 times by C l-C4alkyl and 1e interrupted by oxygen, sulfur or N-R 14, or else the radicals R20 and R21, together with X the carbon atoms to which they are attached, form a CS-C12CYCloalkylene ring which is unsubstituted or substituted from 1 to 3 times by CI-CA[kyl; R22 is hydrogen or Cl-C4alkyl, R23 is hydrogen, Cl-C2ralkanoyl, C3C25alkenoyl, C3-C25alkanoyl interrupted by oxygen, sulfur or N - R C2-C25alkanoyl substituted by a di(C1-Cralkyl)phosphonate group; 14 1 C6-C9cycloalkyicarbonyl, thenoyl, furoyi, benzoyl or Cl-C12alkylsubsfituted benzoyi; H3C', / CH 3 0 CH3 11 -U-C5Ha- OH 0 11 H P, CH3 Cl, CH3 C - CHi- S - CH2- _ -OH R26 0 H3C'. / CH3 11 C,_ CH3 -C-CHi----C--0-OH 1 - CH3 R26 0 0 1 11 11 or -C-Ri7---C-FI2.

2 0 11 1 -C-RS-FIX R24 and R25 independently of one another are hydrogen or Cl-Cl8alkyl, R26 is hydrogen or Cl-C8alkyl, R27 is a direct bond, Cl-Cisalkylene, C2-C, 8alkylene interrupted by oxygen, sulfur or N-R14; C2-Clealkenylene, C2-C20alkylidene, C-rC2Ophenyla1Widene, C5-Cacycloalkylene, GrC8bicycloalkylene, unsubstituted orCl-C4alkylsubsttuted phenylene, 1 \ 0 or 3, ' S e R24 R28 is hydroxyl, 0" -LM rl, C,-C18alkoxy or -N I- r 0 R29 is oxygen, -NH- or / N-C-NH-R..

R30 is C,-Clealkyl or phenyl, R31 is hydrogen or C,-C18alkyl, M is an rvalent metal cation, X is a direct bond, oxygen, sulfur or -NIR31-, n is 1 or 2, p is 0, 1 or 2, q is 1, 2,3,4,5 or 6, r is 1, 2 or 3, and s is 0, 1 or 2.

3. A composition according to claim 1, comprising as component (b) a compound of the formula V 0 0 H R9 R2 5, RIO R5 3 F R,, R4 Re (V) in which R2 is hydrogen or Cl-C6alky], R3 is hydrogen, R4 is hydrogen or Cl-C6alky], R5 is hydrogen, R7, Re, R9, Rio and R,, independently of one another are hydrogen, Cl-C4alkyl or Cl-CAlkoxy, with the proviso that at least two of the radicals R7, R8, R9, Rio or R,, are hydrogen.

9

4. A composition according to claim 1, in which component (b) is a compound of the formula Va or Vb "e 0 CH3 0 H H3C, / / c CH 3 CH3 HP-C-CH3 1 L;P13 (va) or a mixture of the two compounds of the formula Va and Vb.

0 H3C,, / CH3 0 H CH3 1 c CH3 H:3C H.C-C-CH, 1 L;t13 (Vb)

5. A composition according to claim 1, comprising as component (c) a compound of the formula 1, 2, 5 or 6 (1) R'- Y P \ in which O-R', O-W3 A - X P \ W70-P 1 OY:0 P-O-W1 (5) 0 0 W14 0 - R 14 R' /-pn, -P Z1 15 R'15 0 - W14 f F14 n' is the number 2 and y' is the number 1, 2 or 3; A' is C2-Clealkylene, p-phenylene or p-biphenylene, E, if y'is 1, is Cl-C18alkyi, -OR', or fluorine; E, if y' is 2, is p- biphenylene, E, if y' is 3, is N(CH2CH20-)3, W,, R'2 and W3;Independently of one another are Cl-CI8alky], C-rC9phenylalkyi, cyclohexyl. phenyl, or phenyl substituted by 1 to 3 alkyl radicals having in total 1 to 18 carbon atoms; W14is hydrogen or Cl-C9alkyl, / O-W2 O-R' (6) Y' 3 (2) - ny W15 is hydrogen or methyl; X' is a direct bond, Y' is oxygen, Z is a direct bond or -CH(R'16)-, and R16 is Cl-CAlkyl.

-94.

6. A composition according to claim 1, in which component (c) is tris(2,4di-tert-butyl phenyl) phosphite, bis(2,4-di-tert-butyi-6-methylphenyi) ethyl phosphite or tetrakis(2,4-di-tertbutylphenyl) 4,4'biphenylenediphosphonite.

7. A composition according to claim 1, comprising as component (d) a compound of the formula V1 H3C \,,CH3 H3C..o c - HO- -X R, (V1) R2 in which R, is C,-Qtalkyl, n is 1, 2, 3 or 4, 11 11 X is methylene, -CH2-CH2-C-Y- or -CHrC-O-CHi-CH2 oxytle.#, Y ishydFgge or -NH-; and, 0 0 9 n is 1, 0 11 X is - CHi- CH2- C - Y where Y is attached to R2, and R2 is Cl-C25alkyl; and, if n is 2, 0 11 X is - CHi-- CHr c - T -, where Y is attached to FR2s and R2 is CZ-Cl2alkylene, C4-C12alkylene interrupted by oxygen or sulfur, or, if Y is -NH-, R2 is additionally a direct bond; and, if n is 3, 0 11 X is methylene or -CHi-C-O-CHi-CHi--, where the ethylene group is attached to R2, and 1 R2 is Y' Y and, N Y N 0 if n is 4, 0 11.4r X is -CHi--CHI--C-Y-, where Y is attached to R2, and R2 is C4-Cloalkanetetrayl.

8. Composition according to claim 7, in which in the compound of the formula VI, if n is 1, R2 is Cl-C2oalkyl.

9. A composition according to claim 7, in which in the compound of the formula VI, if n is 2, R2 is C2-C8alkyl6ne, C4-C8alkylene interrupted by oxygen or sulfur; or, if Y is -NH-, R2 is additionally a direct bond; and, if n is 4, R2 is C4-C8alkanetetrayl.

10. A composition according to claim 7, in which in the compound of the formula V1 R, is methyl or tert-butyl, n is 1, 2 or 4, 0 11 Xis -CH:F-CHp-C-T-, Y is oxygen or -NH-; and, if n is 1, R2 is C14-C18alkyl; and, if n is 2, R2 is C4-C6alkylene, oriS C4-CBalkylene interrupted by oxygen; and, if n is 4, 1 R2 is C4-C6alkanetetrayl.

11. A composition according to claim 1, in which component (d) is at least one compound of the formula Via, Vlb, Vic or Vld H3C,,CH3 H3C 0 11 HO CHi--CHi---C-NH-(CH2),--- HP'- CH H3C (Via) 2 H3C CH \ c ' 3 H3C 1.11 - 0 11 HO CHI--CHI--C-u-v1SH37 H3C -- c / CH H3 0 H3C\ c,,CH3 H3C 0 11 -CHi--0-CHi- HO- CHi.-CHi--C-J-''"2 H3C H C 3 \ C,,CH3 H3C HO- -CHT-CHI-L; 0-0 H3C' / N, CH3 H3C (Vib) -C (VIC) 4 _ (Vid).

2

12. A composition according to claim 1, in which component (e) comprises at least one radical of the formula XII or XIII (XII) CH3 G, G-CH2 G2 -N G-CH2 CH3 CH3 G, G-CH2 -4-i G2 -N N- G - CH2'o CH3 (XIII) in which G is hydrogen or methyl, and G, and G2 are hydrogen, methyl or together are oxygen.

13. A composition according to claim 1, in which component (e) is a compound of the formula H1, H2, H3, H4, H5, H6 or H7 H3C CH3 0 CH3 CH3 H,..C.0->NO-C-(CH N-OC8H (H1) 2)g--C-0 17 H3C CH3 CH3 CH3 (CHIC n-C4H.

1 HOIO-CHi--C- (CHIC CH3 CH3 -C-O- N-CH 3 CH3 CH3 CH3 0 CH3 H (H2) -2 CH3 H3C 0 11 (H3) H3C-N:::-O-C-(CH 2)i-C-O--- N-CH 3 H3C CH3 CH3 CH3 CH3 CH3 -0 N-CH-CH-O-C-CHi--CHI-C- 2 2 CH3 CH3 0 11 0 11 - (H4) - m CH3 CH3 1 1 FIN-C-CHI-C-CH3 1 1 CH3 CH N N 3 N-(CH 2)j--N H 3C 4. CH 3 H 3C CH3 N CH 4N H3C 1 3 H3C 1 CH 3 H H R' R' 1 1 R'-NH-(CH2)i-N-(CH2)i--N-(CH2)i-NH-R' CH3 CH3 H3C, NJ.'N CH3 R' = H3C - N - N N-- N-CH3 H C n-t; H.

3 CH3 n-IL;4t1, 4M9 CH3 CH 3 HN-CH2CH20H N':kN n-C,H;-N N -N-n-C 4 Hq H 3 CH 3 H 3 4, CH 3 N N 3 C 1 CH 3 3 C 1 CH 3 U 0 in which m is a number from the range from 2 to 200.

(H5) m (H6) (H7) -100-

14. A composition according to claim 1, comprising as component (a) a natural, semisynthetic or synthetic polymer.

15. A composition according to claim 1, comprising as component (a) a thermoplastic polymer.

16. A composition according to claim 1, comprising as component (a) a poiyolefin.

17. A composition according to claim 1, comprising as component (a) polyethylene or polypropylene or a copolymer thereof with mono- and diolefins.

18. A composition according to claim 1, comprising as component (a) a thick-layer polyolefin moulding.

19. A composition according to claim 18, in which the thick-layer polyolefin moulding has a layer thickness of from 1 to 50 mm.

20. A composition according to claim 18, in which the thick-layer polyolefin moulding cornprises polyolefin pipes or polyolefin geomembranes.

21. A composition according to claim 1, comprising as component (a) a polyolefin which is in long-term contact with extractive media.

22. A composition according to claim 21, in which the extractive medium is a liquid or gaseous inorganic or organic material.

23. A composition according to claim 1, in which component (b) is present in an amount of from 0.0005 to 5% based on the weight of component (a).

24. A composition according to claim 1, in which components (c), (d) and (e) are present in an amount of from 0.01 to 10% based on the weight of component (a).

25. A composition according to claim 1, comprising in addition to components (a), (b), (c), (d) and (e) further additives as well.

-101-

26. A stabilizer mixture comprising i) at least one compound of the benzofuran-2-one type, ii) at least one compound from the group of the organic phosphites or phosphonites, iii) at least one compound from the group of the phenolic antioxidants, and iv) at least one compound from the group of the sterically hindered amines.

27. A stabilizer mixture according to claim 26, in which the weight ratio of the components is from 10: 1: 1: 0.1 to 0.01: 1: 10: 100.

28. A process for stabilizing an organic material against oxidative, thermal or light-induced degradation, which comprises incorporating in or applying to said material at least one each of components (b), (c), (d) and (e) according to claim 1.

29. The use of a mixture of components (b), (c), (d) and (e) according to claim 1 as stabilk zers for organic materials against oxidative, thermal or light-induced degradation. r