ITMI981837A1

ITMI981837A1 - STABILIZING MIXTURE HAVING A FUSION POINT LOWER THAN THAT OF THE MOST HIGH-DARK COMPONENT

Info

Publication number: ITMI981837A1
Application number: IT98MI001837A
Authority: IT
Inventors: Luciano Pallini; Silvestro Costanzi
Original assignee: Great Lakes Chemical Italia
Priority date: 1998-08-05
Filing date: 1998-08-05
Publication date: 2000-02-05
Also published as: IT1301995B1; ITMI981837A0; WO2000008096A1

Description

"MISCELA STABILIZZANTE AVENTE UN PUNTO DI FUSIONE INFERIORE A QUELLO DEL COMPONENTE PIU' ALTO-FONDENTE" "STABILIZING MIXTURE HAVING A FUSION POINT LOWER THAN THAT OF THE HIGHEST-DARK COMPONENT"

DESCRIZIONE DESCRIPTION

La presente invenzione riguarda una miscela stabilizzante avente un punto di fusione inferiore a quello del componente più altofondente. The present invention relates to a stabilizing mixture having a melting point lower than that of the higher melting component.

Più in particolare la presente invenzione riguarda una miscela stabilizzante avente un punto di fusione inferiore a quello del componente più altofondente comprendente l'ottadecil-3-(3',5'-di-t-butil-4'-idrossifenil)propionato ed il tetrakis [3-(3,5-di-t-butil-4-idrossifenil)propionilossimetil]-metano ed il suo utilizzo come stabilizzante alla degradazione ossidativa causata dalla luce e/o dal calore di polimeri organici. More specifically, the present invention relates to a stabilizing mixture having a melting point lower than that of the higher melting component comprising octadecyl-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate and tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl] -methane and its use as a stabilizer to the oxidative degradation caused by light and / or heat of organic polymers.

La presente invenzione riguarda inoltre le composizioni polimeriche stabilizzate con la suddetta miscela stabilizzante ed i manufatti ottenuti da dette composizioni. The present invention also relates to the polymeric compositions stabilized with the aforementioned stabilizing mixture and the manufactured articles obtained from said compositions.

E' noto nell'arte che il relativamente elevato punto di fusione, 110°C-125°C, del tetrakis [3(3,5-di-t-butil-4-idrossifenil)propionilossimetil]-metano costituisce un problema nella stabilizzazione dei polimeri organici in quei settori applicativi nei quali il polimero viene lavorato a temperature relativamente basse come, ad esempio, nel caso del "blow-moulding" del polietilene a bassa o ad alta densità, nella lavorazione della gomma naturale, oppure negli "hot-melts". It is known in the art that the relatively high melting point, 110 ° C-125 ° C, of tetrakis [3 (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl] -methane constitutes a problem in the stabilization of organic polymers in those application sectors in which the polymer is processed at relatively low temperatures such as, for example, in the case of the "blow-molding" of low or high density polyethylene, in the processing of natural rubber, or in the "hot- melts ".

Nei suddetti casi il tetrakis [3-(3,5-di-t-butil-4-idrossifenil )propionilossimetil]metano può fondere solo parzialmente creando problemi di disomogeinità di distribuzione, con conseguente formazione di zone di fragilità nel manufatto ottenuto a causa della presenza di cristalli segregati. In the aforementioned cases, tetrakis [3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl] methane can melt only partially, creating problems of distribution inhomogeneity, with consequent formation of areas of fragility in the product obtained due to presence of segregated crystals.

La Richiedente ha ora trovato che è possibile abbassare il punto di fusione del tetrakis [3—(3,5— di-t-butil-4-drossifenil )propionilossimetil]metano miscelandolo con 1'ottadecil-3-(3',5'-di-t-butil-4'-idrossifenil)propionato. Si ottiene, in questo modo, una miscela dei due stabilizzanti caratterizzata dall'avere un intervallo di fusione compreso tra 50°C e 60°C: detto intervallo di fusione è vicino, quindi, al punto di fusione dell'ottadecil-3-(3',5'-di-t-butil-4'-idrossifenil)propionato che, come noto, è di 49°C-53°C. The Applicant has now found that it is possible to lower the melting point of tetrakis [3— (3,5— di-t-butyl-4-hydroxyphenyl) propionyloxymethyl] methane by mixing it with octadecyl-3- (3 ', 5' -di-t-butyl-4'-hydroxyphenyl) propionate. In this way, a mixture of the two stabilizers is obtained characterized by having a melting range between 50 ° C and 60 ° C: said melting range is therefore close to the melting point of octadecyl-3- ( 3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate which, as known, is 49 ° C-53 ° C.

La suddetta miscela può essere utilizzata a basse temperature consentendo una migliore omogenizzazione all'interno del polimero da stabilizzare superando quindi, gli inconvenienti dell'arte nota. The above mixture can be used at low temperatures allowing a better homogenization inside the polymer to be stabilized, thus overcoming the drawbacks of the known art.

Costituisce pertanto oggetto della presente invenzione una miscela stabilizzante comprendente: (a) tetrakis (3-(3,5-di-t-butil-4-idrossifenil)propionilossimetil]metano avente formula (I): Therefore, the subject of the present invention is a stabilizing mixture comprising: (a) tetrakis (3- (3,5-di-t-butyl-4-hydroxyphenyl) propionyloxymethyl] methane having formula (I):

(I) ; (I);

(b) ottadecil-3-(3',5'-di-t-butil-4'-idrossifenil)-propionato avente formula (II): (b) octadecyl-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) -propionate having formula (II):

(II) ; (II);

caratterizzata dal fatto di avere un punto di fusione compreso tra 50°C e 60°C. characterized by having a melting point between 50 ° C and 60 ° C.

Il componente (a) avente formula (I) ed il componente (b) avente formula (II) vengono utilizzati in rapporto compreso tra 9:1 e 1:9, preferibilmente tra 3:1 e 1:3. Component (a) having formula (I) and component (b) having formula (II) are used in a ratio comprised between 9: 1 and 1: 9, preferably between 3: 1 and 1: 3.

Il componente (a) avente formula (I) è noto con i seguenti nomi commerciali: Anox 20 della Great Lakes, Irganox 1010 della Ciba. Component (a) having formula (I) is known by the following trade names: Anox 20 from Great Lakes, Irganox 1010 from Ciba.

Il componente (b) avente formula (II) è noto con i seguenti nomi commerciali: Anox PP18 della Great Lakes, Irganox 1076 della Ciba. Component (b) having formula (II) is known by the following trade names: Anox PP18 from Great Lakes, Irganox 1076 from Ciba.

La miscela stabilizzante oggetto della presente invenzione può essere ottenuta attraverso vari procedimenti. The stabilizing mixture object of the present invention can be obtained through various processes.

Un primo procedimento consiste nel prendere le polveri fini dei due componenti (a) e (b) e nel mescolarle intimamente sotto macinazione. Tuttavia, detto procedimento, è poco utilizzato perchè, in questo modo, pur ottenendo miscele omogenee dei due prodotti, dette miscele risultano essere estremamente fini e pulvirulente. A first procedure consists in taking the fine powders of the two components (a) and (b) and mixing them intimately under grinding. However, said process is little used because, in this way, while obtaining homogeneous mixtures of the two products, said mixtures are extremely fine and pulverulent.

Un secondo procedimento consiste nel disperdere do il composto (a) altofondente nel composto (b) bassofondente fuso lasciando la miscela dei due, eventualmente sotto agitazione, a temperatura compresa tra 50°C e 60°C, fino ad ottenere una dispersione omogenea. Successivamente, detta dispersione, viene lasciata raffreddare, a temperatura ambiente, fino ad ottenere un solido che viene successivamente macinato o scagliettato. A second process consists in dispersing the high melting compound (a) in the melted low melting compound (b) leaving the mixture of the two, possibly under stirring, at a temperature between 50 ° C and 60 ° C, until a homogeneous dispersion is obtained. Subsequently, said dispersion is left to cool, at room temperature, until a solid is obtained which is subsequently ground or flaked.

Un terzo procedimento consiste nel fondere entrambi i componenti (a) e (b) lasciando la miscela dei due, eventualmente sotto agitazione, a temperatura compresa tra 120°C e 130°C, fino ad ottenere una soluzione omogenea. Successivamente, detta soluzione, viene lasciata raffreddare, a temperatura ambiente, fino ad ottenere un solido che viene successivamente macinato o scagliettato. A third process consists in melting both components (a) and (b) leaving the mixture of the two, possibly under stirring, at a temperature between 120 ° C and 130 ° C, until a homogeneous solution is obtained. Subsequently, said solution is left to cool, at room temperature, until a solid is obtained which is subsequently ground or flaked.

Infine, un quarto procedimento consiste nella co-cristallizzazione dei due componenti (a) e (b), nei rapporti voluti, da un solvente organico nel quale detti componenti sono entrambi solubili a caldo ed insolubili a freddo quale, ad esempio, metanolo, miscela metanolo/acqua, miscela acetone/acqua, ecc. Finally, a fourth process consists in the co-crystallization of the two components (a) and (b), in the desired ratios, from an organic solvent in which said components are both hot-soluble and cold-insoluble such as, for example, methanol, mixture methanol / water, acetone / water mixture, etc.

Le suddette miscele stabilizzanti sono utili quali stabilizzanti alla degradazione ossidativa causata dalla luce e/o dal calore per polimeri organici. Esempi di polimeri organici che possono essere stabilizzati sono: The above stabilizing mixtures are useful as stabilizers to the oxidative degradation caused by light and / or heat for organic polymers. Examples of organic polymers that can be stabilized are:

1. Polimeri delle monoolefine e delle diolefine come, ad esempio, polipropilene, poliisobutilene, polibut-l-ene, poli-4-metilpent-l-ene, poliisoprene o polibutadiene; così come polimeri delle cicloolefine come, ad esempio, ciclopentene o norbornene ; polietilene (che può essere opzionalmente reticolato) come, ad esempio, polietilene ad elevata densità (HDPE), polietilene ad elevata densità e ad elevato peso molecolare ((HDPE-HMW), polietilene ad elevata densità ed ad elevatissimo peso molecolare ("ultrahigh molecular weight") (HDPE-UHMW), polietilene a media densità (MDPE), polietilene a bassa densità (LDPE), polietilene lineare a bassa densità (LLDPE) polietilene ramificato a bassa densità (BLDPE). 1. Polymers of monoolefins and diolefins such as, for example, polypropylene, polyisobutylene, polybut-1-ene, poly-4-methylpent-1-ene, polyisoprene or polybutadiene; as well as cycloolefin polymers such as, for example, cyclopentene or norbornene; polyethylene (which can optionally be cross-linked) such as, for example, high density polyethylene (HDPE), high density and high molecular weight polyethylene ((HDPE-HMW), high density and very high molecular weight polyethylene ("ultrahigh molecular weight ") (HDPE-UHMW), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low density polyethylene (LLDPE) branched low density polyethylene (BLDPE).

Le poliolefine quali, ad esempio le monolefine esemplificate nel paragrafo precedente, preferibilmente il polietilene ed il polipropilene, possono essere preparate attraverso diversi metodi noti in letteratura, preferibilmente utilizzando i seguenti metodi: Polyolefins such as, for example the monolefins exemplified in the previous paragraph, preferably polyethylene and polypropylene, can be prepared by various methods known in the literature, preferably by using the following methods:

(a) polimerizzazione radicalica (generalmente condotta ad elevata pressione e ad elevata tempe-.ratura); (a) radical polymerization (generally carried out at high pressure and at high temperature);

(b) polimerizzazione catalitica utilizzando un catalizzatore che normalmente contiene uno o più metalli dei gruppi IVb, Vb, VIb o VIII della Tavola Periodica. Detti metalli, generalmente, hanno uno o più leganti quali, ad esempio, ossidi, alogenuri, alcoolati, esteri, eteri, ammine, alchili, alchenili e/o arili che possono essere π- oppure σ-coordinati. Questi complessi metallici possono essere in forma libera oppure supportati su substrati quali, ad esempio, magnesio cloruro attivato, titanio(III)cloruro, allumina od ossido di silicio. Detti catalizzatori possono essere solubili od insolubili nel mezzo di reazione. I catalizzatori possono essere utilizzati da soli oppure in presenza di altri attivatori quali, ad esempio, alchili metallici, idruri metallici, alogenuri di alchili metallici, ossidi di alchilici metallici od alchilossani metallici, detti metalli essendo elementi appartenenti ai gruppi la, Ila e/o Illa della Tavola Periodica. Gli attivatori possono essere convenientemente modificati con altri gruppi esterei, eterei, amminici o silileterei. Detti sistemi catalitici vengono usualmente chiamati Phillips, Standard Oil Indiana, Ziegler {-Natta), TNZ (DuPont), metallocene o "single site catalyst" (SSC). (b) catalytic polymerization using a catalyst which normally contains one or more metals of groups IVb, Vb, VIb or VIII of the Periodic Table. Said metals generally have one or more ligands such as, for example, oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and / or aryls which can be π- or σ-coordinate. These metal complexes can be in free form or supported on substrates such as, for example, activated magnesium chloride, titanium (III) chloride, alumina or silicon oxide. Said catalysts can be soluble or insoluble in the reaction medium. The catalysts can be used alone or in the presence of other activators such as, for example, metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes, said metals being elements belonging to groups la, 11a and / or Illa of the Periodic Table. The activators can be conveniently modified with other ester, ether, amino or silyl ether groups. Said catalytic systems are usually called Phillips, Standard Oil Indiana, Ziegler {-Natta), TNZ (DuPont), metallocene or "single site catalyst" (SSC).

2. Miscele dei polimeri descritti al punto (1) come, ad esempio, miscele di polipropilene con poliisobutilene; miscele di polipropilene con polietilene (ad esempio, PP/HDPE, PP/LDPE); miscele di differenti tipi di polietilene (ad esempio, LDPE/HDPE). 2. Mixtures of the polymers described in point (1) such as, for example, mixtures of polypropylene with polyisobutylene; blends of polypropylene with polyethylene (for example, PP / HDPE, PP / LDPE); mixtures of different types of polyethylene (for example, LDPE / HDPE).

3. Copolimeri delle monoolefine e delle diolefine tra loro o con altri monomeri vinilici come, ad esempio, copolìmeri etilene/propilene, polietilene lineare a bassa densità (LLDPE) e sue miscele con polietilene a bassa densità (LDPE), copolimeri propilene/but-l-ene, copolimeri propilene/isobutilene, copolimeri etilene/but-l-ene, copolimeri etilene/esene, copolimeri etilene/metilpentene, copolimeri etilene/eptene, copolimeri etilene/ottene, copolimeri propilene/butadiene, copolimeri isobutilene/isoprene, copolimeri etilene/alchil acrilato, copolimeri etilene/alchil metacrilato, copolimeri etilene/vinil acetato e loro copolimeri con monossido di carbonio o copolimeri etilene/acido acrilico e loro sali (ionomeri) così come terpolimeri dell'etilene con propilene ed un diene come, ad esempio, esadiene, diciclopentadiene o etilidenenorbornene; e miscele di detti copolimeri tra loro oppure con i polimeri sopra riportati al punto (1) quali, ad esempio, copolimeri polipropilene/etilene/propilene, copolimeri LDPE/etilene/vinil acetato (EVA), copolimeri LDPE/etilene/acido acrilico (EAA), LLDPE/EVA, LLDPE/EAA, e copolimeri alternati o "random" polialchilene/monossido di carbonio e loro miscele con altri polimeri quali, ad esempio, poliammidi. 3. Copolymers of monoolefins and diolefins with each other or with other vinyl monomers such as, for example, ethylene / propylene copolymers, linear low density polyethylene (LLDPE) and its mixtures with low density polyethylene (LDPE), propylene / but- l-ene, propylene / isobutylene copolymers, ethylene / but-l-ene copolymers, ethylene / hexene copolymers, ethylene / methylpentene copolymers, ethylene / heptene copolymers, ethylene / octene copolymers, propylene / isoprene copolymers, isobutylene / isoprene copolymers / alkyl acrylate, 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, for example, hexadiene, dicyclopentadiene or ethylideneenorbornene; and mixtures of said copolymers with each other or with the polymers listed above in point (1) such as, for example, polypropylene / ethylene / propylene copolymers, LDPE / ethylene / vinyl acetate (EVA) copolymers, LDPE / ethylene / acrylic acid copolymers (EAA ), LLDPE / EVA, LLDPE / EAA, and alternating or "random" polyalkylene / carbon monoxide copolymers and their mixtures with other polymers such as, for example, polyamides.

4. Resine idrocarburiche (ad esempio, C5-C9) comprendenti le loro modificazioni idrogenate (ad esempio, adesivanti) e miscele con polialchilene ed amido. 4. Hydrocarbon resins (for example, C5-C9) comprising their hydrogenated modifications (for example, tackifiers) and blends with polyalkylene and starch.

5. Polistirene, poli (p-metilstirene), poli(a-metilstirene) . 5. Polystyrene, poly (p-methylstyrene), poly (a-methylstyrene).

6. Copolimeri dello stirene o dell'a-metilstirene con dieni o derivati acrilici come, ad esempio, stirene/butadiene, stirene/acrilonitrile, stirene/alchil metacrilato, stirene/butadiene/alchil acrilato, stirene/butadiene/alchil metacrilato, stirene/anidride maleica, stirene/acrilonitrile/metil acrilato; miscele, aventi un elevato carico di rottura, tra copolimeri dello stirene ed un altro polimero come, ad esempio, un poliacrilato, un polimero di un diene od un terpolimero etilene/propilene/diene, copolimeri a blocchi dello stirene come, ad esempio, stirene/butadiene/stirene, stirene/isoprene /stirene, stirene/etilene/butilene/stirene o stirene/etilene/propilene/stirene. 6. Copolymers of styrene or a-methylstyrene with dienes or acrylic derivatives such as, 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, having a high breaking load, between styrene copolymers and another polymer such as, for example, a polyacrylate, a polymer of a diene or an ethylene / propylene / diene terpolymer, styrene block copolymers such as, for example, styrene / butadiene / styrene, styrene / isoprene / styrene, styrene / ethylene / butylene / styrene or styrene / ethylene / propylene / styrene.

7. Copolimeri graffati dello stirene o dell'ametilstirene come, ad esempio, stirene in polibutadiene, stirene in polibutadiene o copolimeri polibutadiene-acrilonitrile; stirene ed acrilonitrile (o metacrilonitrile) in polibutadiene; stirene, acrilonitrile e metìlmetacrilato in polibutadiene; stirene ed anidride maleica in polibutadiene; stirene, acrilonitrile ed anidride maleica o maleimmide in polibutadiene; stirene e maleimmide in polibutadiene; stirene ed alchilacrilati o metacrilati in polibutadiene; stirene ed acrilonitrile in terpolimeri etilene/propilene/diene, stirene ed acrilonitrile in polialchil acrilati o polialchil metacrilati, stirene ed acrilonitrile in copolimeri acrilato/butadiene, così come miscele dei copolimeri sopra riportati con i copolimeri riportati al punto (6) come, ad esempio, miscele di copolimeri note come ABS, MBS, ASA o AES; 7. Graft copolymers of styrene or amethylstyrene such as, for example, styrene in polybutadiene, styrene in polybutadiene or polybutadiene-acrylonitrile copolymers; styrene and acrylonitrile (or methacrylonitrile) in polybutadiene; styrene, acrylonitrile and methyl methacrylate in polybutadiene; styrene and maleic anhydride in polybutadiene; styrene, acrylonitrile and maleic anhydride or maleimide in polybutadiene; styrene and maleimide in polybutadiene; styrene and alkyl acrylates or methacrylates in polybutadiene; styrene and acrylonitrile in ethylene / propylene / diene terpolymers, styrene and acrylonitrile in polyalkyl acrylates or polyalkyl methacrylates, styrene and acrylonitrile in acrylate / butadiene copolymers, as well as mixtures of the copolymers listed above with the copolymers listed in point (6) such as, for example , blends of copolymers known as ABS, MBS, ASA or AES;

8. Polimeri contenenti alogeni come, ad esempio, policloroprene, gomme clorurate, copolimeri isobutilene-isoprene clorurati o brominati ("halobutyl rubber"), polietilene clorurato o clorosulfonato, copolimeri etilene ed etilene clorurato, omopolimeri e copolimeri dell'epicloridrina, in particolare polimeri di composti vinilici contenenti alogeni come, ad esempio, polivinil cloruro, polivinilidencloruro, polivinil fluoruro o polivinilidenfluoruro; ed anche loro copolimeri come, ad esempio, vinil cloruro/vinilidencloruro, vinil cloruro/vinil acetato o vinilidencloruro vinil acetato. 8. Polymers containing halogens such as, for example, polychloroprene, chlorinated rubbers, chlorinated or brominated isobutylene-isoprene copolymers ("halobutyl rubber"), chlorinated polyethylene or chlorosulfonated, ethylene and chlorinated ethylene copolymers, homopolymers and copolymers of epichlorohydrin, in particular polymers of halogen-containing vinyl compounds such as, for example, polyvinyl chloride, polyvinylidene chloride, polyvinyl fluoride or polyvinylidene fluoride; and also their copolymers such as, for example, vinyl chloride / vinylidene chloride, vinyl chloride / vinyl acetate or vinylidene chloride vinyl acetate.

9. Polimeri derivati da acidi α,β-insaturi e loro derivati come, ad esempio, poliacrilati e polimetacrilati, polimetil metacrilati, poliacrilammidi e poliacrilonitrili, modificati con butil acrilato. 10. Copolimeri dei monomeri di cui al punto (9) tra loro o con altri monomeri insaturi come, ad esempio, copolimeri acrilonitrile/butadiene, copolimeri acrilonitrile/alchil acrilato, copolimeri acrilonitrile/alcossialchil acrilato o copolimeri acrilonitrile/alogenuro vinilico o terpolimeri acrilonitrile/alchil metacrilato/butadiene. 9. Polymers derived from α, β-unsaturated acids and their derivatives such as, for example, polyacrylates and polymethacrylates, polymethyl methacrylates, polyacrylamides and polyacrylonitriles, modified with butyl acrylate. 10. Copolymers of the monomers referred to in point (9) with each other or with other unsaturated monomers such as, for example, acrylonitrile / butadiene copolymers, acrylonitrile / alkyl acrylate copolymers, acrylonitrile / alkoxyalkyl acrylate copolymers or acrylonitrile / acrylonitrile / vinyl halide copolymers alkyl methacrylate / butadiene.

11. Polimeri derivati da alcooli insaturi ed animine, o loro derivati acilici od acetalici come, ad esempio, polivinil alcool, polivinil acetato, polivinil stearato, polivinil benzoato, polivinil maleato, polivinil butirrale, poliallil ftalato o poliallil melammina; così come loro copolimeri con le olefine di cui al punto (1). 11. Polymers derived from unsaturated alcohols and animins, or their acyl or acetal derivatives such as, 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 the olefins referred to in point (1).

12. Omopolimeri e copolimeri di eteri a catena aperta oppure di eteri ciclici come, ad esempio, glicoli polialchilenici, polietileneossido, polipropilene ossido, oppure copolimeri dei composti sopra descritti con bis-glicidil eteri. 12. Homopolymers and copolymers of open chain ethers or of cyclic ethers such as, for example, polyalkylene glycols, polyethylene oxide, polypropylene oxide, or copolymers of the compounds described above with bis-glycidyl ethers.

13. Poliacetali come, ad esempio, poliossimetilene e quei poliossimetileni che contengono ossido di etilene come comonomero; poliacetali modificati con poliuretani termoplastici, acrilati o MBS. 13. Polyacetals such as, for example, polyoxymethylene and those polyoxymethylenes which contain ethylene oxide as a comonomer; polyacetals modified with thermoplastic polyurethanes, acrylates or MBS.

14. Ossidi e solfuri del polifenilene e miscele di ossidi del polifenilene con polimeri stirenici o poliammidici. 14. Oxides and sulphides of polyphenylene and mixtures of oxides of polyphenylene with styrenic or polyamide polymers.

15. Poliuretani derivati da polieteri, poliesteri o polibutadieni idrossil-terminati da un lato e poliisocianati alifatici od aromatici dall'altro, così come i precursori dei composti di cui sopra. 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 the precursors of the above compounds.

16. Poliammidi e copoliammidi derivate da diammine ed acidi dicarbossilici e/o da acidi amminocarbossilici o dai corrispondenti lattami come, ad esempio, poliammide 4, poliammide 6, poliammide 6/6, 6/10, 6/9, 6/12, 4/6, 12/12, poliammide 11, poliammide 12, poliammidi aromatiche ottenute a partire da m-xilene diammina ed acido adipico; poliammidi preparate da esametilenediammina ed acido isoftalico e/o tereftalico e con o senza un elastomero come agente modificante, ad esempio, poli-2,4,4-trimetilesametilene tereftalammide o poli-m-fenilene isoftalammide; ed anche copolimeri a blocchi delle suddette poliammidi con poliolefine, copolimeri olefinici, ionomeri od elastomeri legati chimicamente o graffati; o con polieteri come, ad esempio, polietilene glicole, polipropilene glicole o politetrametilene glicole; così come poliammidi o copoliammidi modificate con EPDM od ABS; e poliammidi condensate durante la lavorazione ("RIM polyamide System"). 16. Polyamides and copolyamides derived from diamines and dicarboxylic acids and / or from aminocarboxylic acids or from the corresponding lactams such as, for example, polyamide 4, polyamide 6, polyamide 6/6, 6/10, 6/9, 6/12, 4 / 6, 12/12, polyamide 11, polyamide 12, aromatic polyamides obtained starting from m-xylene diamine and adipic acid; polyamides prepared from hexamethylenediamine and isophthalic and / or terephthalic acid and with or without an elastomer as modifying agent, for example, poly-2,4,4-trimethylhexamethylene terephthalamide or poly-m-phenylene isophthalamide; and also block copolymers of the aforesaid polyamides with polyolefins, olefin copolymers, ionomers or elastomers chemically bonded or grafted; or with polyethers such as, for example, 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 System").

17. Poliuree, poliimmidi, poliammideimmidi, polieteriimmidi, poliesteriimmidi, poliidantoine, e polibenzoimidazoli . 17. Polyureas, polyimides, polyamideimides, polyetherimides, polyesterimides, polyhydantoins, and polybenzoimidazoles.

18 . Poliesteri derivati da acidi dicarbossilici e dioli e/o da acidi idrossicarbossilici o dai corrispondenti lattoni come, ad esempio, polietilene tereftalato, polibutilene tereftalato, poli-1,4-dimetilolcicloesano tereftalato e poliidrossibenzoati, così come copolieteri esteri a blocchi derivati da polieteri con gruppi idrossil-terminali; ed anche poliesteri modificati con policarbonati o MBS. 18. Polyesters derived from dicarboxylic acids and diols and / or from hydroxycarboxylic acids or from the corresponding lactones such as, for example, polyethylene terephthalate, polybutylene terephthalate, poly-1,4-dimethylolcyclohexane terephthalate and polyhydroxybenzoates, as well as block copolyether esters derived from polyethers with groups hydroxyl-terminus; and also polyesters modified with polycarbonates or MBS.

19. Policarbonati e poliesteri carbonati. 19. Polycarbonates and polyester carbonates.

20. Polisolfoni, polieterisolfoni e polieterichetoni . 20. Polysulfones, polyethersulfones and polyetherketones.

21. Polimeri reticolati derivati da aldeidi da una parte e da fenoli, urea e melammine dall'altra come, ad esempio, resine fenolo/formaldeide, resine urea/formaldeide e resine melammina/formaldeide. 22. Resine alchidiche essicate o non-essicate. 21. Cross-linked polymers derived from aldehydes on the one hand and from phenols, urea and melamines on the other such as, for example, phenol / formaldehyde resins, urea / formaldehyde resins and melamine / formaldehyde resins. 22. Dried or non-dried alkyd resins.

23. Resine a base di poliesteri insaturi derivate da copoliesteri di acidi dicarbossilici saturi ed insaturi con alcooli poliidrici e composti vinilici come agenti reticolanti, ed anche resine di cui sopra contenenti alogeni ed aventi una buona resistenza alla fiamma. 23. Resins based on unsaturated polyesters derived from copolyesters of saturated and unsaturated dicarboxylic acids with polyhydric alcohols and vinyl compounds as crosslinking agents, and also the above resins containing halogens and having good flame resistance.

24. Resine acriliche reticolabili derivate da acrilati sostituiti come, ad esempio, epossi acrilati, uretani acrilati o poliesteri acrilati. 24. Crosslinkable acrylic resins derived from substituted acrylates such as, for example, epoxy acrylates, urethane acrylates or polyester acrylates.

25. Resine alchidiche, resine a base di poliesteri o resine acrilate reticolate con resine melamminiche, resine a base di urea, resine a base di isocianati, resine a base di isocianurati, resine a base di poliisocianati o resine epossidiche. 25. Alkyd resins, resins based on polyester or acrylate resins cross-linked with melamine resins, resins based on urea, resins based on isocyanates, resins based on isocyanates, resins based on polyisocyanates or epoxy resins.

26. Resine epossidiche reticolate derivate da composti glicidilici alifatici, cicloalifatici, eterociclici od aromatici quali, ad esempio, prodotti di eteri diglicidilici del bisfenolo A e del bisfenolo F, che vengono reticolati con gli agenti indurenti usuali quali, ad esempio, anidridi od ammine, in presenza od in assenza di acceleranti. 26. Cross-linked epoxy resins derived from aliphatic, cycloaliphatic, heterocyclic or aromatic glycidyl compounds such as, for example, products of diglycidyl ethers of bisphenol A and bisphenol F, which are cross-linked with the usual hardening agents such as, for example, anhydrides or amines, in the presence or absence of accelerators.

27. Polimeri naturali come, ad esempio, cellulosa, gomma, gelatina, e loro derivati chimicamente modificati per dare polimeri omologhi come, ad esempio, acetati, propionati e butirrati di cellulosa, oppure eteri di cellulosa come, ad esempio, metilcellulosa; così come resine idrocarburiche ("rosins") e loro derivati. 27. Natural polymers such as, for example, cellulose, rubber, gelatin, and their chemically modified derivatives to give homologous polymers such as, for example, cellulose acetates, propionates and butyrates, or cellulose ethers such as, for example, methylcellulose; as well as hydrocarbon resins ("rosins") and their derivatives.

28. Miscele dei polimeri sopra menzionati ("polyblends") come, ad esempio, PP/EPDM, poliammide/EPDM o ABS, PVC/EVA, PVC/ABS, PVC/MBS, PC/ABS, PBTP/ABS, PC/ASA, PC/PBT, PVC/CPE, PVC/acrilati , POM/termoplastici PUR, PC/termoplastici PUR, POM/acrilati, POM/MBS, PPO/HIPS, PPO/PA 6.6 e copolimeri, PA/HDPE, PA/PP, PA/PPO, PBT/PC/ABS, PBT/PET/PC. 28. Blends of the above mentioned polymers ("polyblends") such as, 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, POM / PUR thermoplastics, PC / PUR thermoplastics, POM / acrylates, POM / MBS, PPO / HIPS, PPO / PA 6.6 and copolymers, PA / HDPE, PA / PP, PA / PPO, PBT / PC / ABS, PBT / PET / PC.

29. Materiali organici naturali o sintetici che sono composti monomerici puri o miscele di detti composti quali, ad esempio, olii minerali, olii, grassi o cere animali o vegetali, olii, grassi o cere a base di esteri sintetici (ad esempio, ftalati, adipati, fosfati, trimellitati), come anche miscele di esteri sintetici con olii minerali in qualsivoglia rapporto in peso, in particolare quelli utilizzati nelle composizioni per filatura, così come le'emulsioni acquose di detti materiali organici. 29. Natural or synthetic organic materials which are pure monomer compounds or mixtures of these compounds such as, for example, mineral oils, oils, animal or vegetable fats or waxes, oils, fats or waxes based on synthetic esters (for example, phthalates, adipates, phosphates, trimellitates), as well as mixtures of synthetic esters with mineral oils in any weight ratio, in particular those used in the compositions for spinning, as well as the aqueous emulsions of said organic materials.

30. Emulsioni acquose di gomme naturali o sintetiche quali, ad esempio, lattice naturale o lattici a base di copolimeri stirene-butadiene carbossilati. La presente invenzione riguarda, inoltre, composizioni polimeriche contenenti un polimero organico ed una quantità efficace della suddetta miscela stabilizzante. 30. Aqueous emulsions of natural or synthetic rubber such as, for example, natural latex or latex based on carboxylated styrene-butadiene copolymers. The present invention also relates to polymeric compositions containing an organic polymer and an effective amount of the above stabilizing mixture.

La miscela stabilizzante oggetto della presente invenzione è particolarmente utile nella stabilizzazione dei polimeri organici sintetici scelti tra quelli sopra riportati. Preferibilmente, è utile nella stabilizzazione di polimeri organici che vengono sottoposti a lavorazione a temperature relativamente basse come, ad esempio, nella "masticazione" della gomma naturale che viene condotta a 90°C. The stabilizing mixture object of the present invention is particularly useful in the stabilization of the synthetic organic polymers selected from those reported above. Preferably, it is useful in the stabilization of organic polymers which are subjected to processing at relatively low temperatures such as, for example, in the "chewing" of natural rubber which is carried out at 90 ° C.

Ulteriore oggetto della presente invenzione sono i manufatti ottenuti dalla lavorazione delle suddette composizioni polimeriche. A further object of the present invention are the manufactured articles obtained from the processing of the aforesaid polymeric compositions.

La miscela stabilizzante oggetto della presente invenzione viene aggiunta ai polimeri organici da stabilizzare in quantità compresa tra 0,01% e 5% sul peso totale del polimero da stabilizzare, preferibilmente 0,05% e 3%, ancora più preferibilmente tra 0,1% e 1%. The stabilizing mixture object of the present invention is added to the organic polymers to be stabilized in a quantity comprised between 0.01% and 5% of the total weight of the polymer to be stabilized, preferably 0.05% and 3%, even more preferably between 0.1% and 1%.

La miscela stabilizzante oggetto della presente invenzione può essere incorporata nel polimero organico da stabilizzare mediante tecniche note. The stabilizing mixture object of the present invention can be incorporated in the organic polymer to be stabilized by known techniques.

La miscela stabilizzante oggetto della presente invenzione può essere utilizzata in combinazione con altri additivi convenzionali o loro miscele. Detti additivi vengono aggiunti in quantità compresa tra circa 0,1% e circa 5% in peso sul peso delle composizioni polimeriche da stabilizzare, preferibilmente tra circa 0,5% e circa 3% in peso. A titolo di esempio vengono sotto riportati alcuni tra gli additivi utilizzati. The stabilizing mixture object of the present invention can be used in combination with other conventional additives or their mixtures. Said additives are added in quantities ranging from about 0.1% to about 5% by weight of the weight of the polymeric compositions to be stabilized, preferably between about 0.5% and about 3% by weight. By way of example, some of the additives used are listed below.

1. Antiossidanti 1. Antioxidants

1.1 Monofenoli alchilati come, ad esempio: 2,6-dit-butil-4-metilfenolo; 2-t-butil-4,6-dimetilfenolo; 2.6-di-t-butil-4-etilfenolo; 2,6-di-t-butil-4-n-butilfenolo; 2,6-di-t-butil-4-isobutilfenolo; 2,6-diciclopentìl-4-metilfenolo; 2-(α-metilcicloesil)-4.6-dimetilfenolo; 2, 6-diottadecil-4-metilfenolo; 2.4.6-tricicloesilfenolo; 2,6-di-t-butil-4-metossimetilfenolo; nonilfenoli a catena alchilica lineare o ramificata quali, ad esempio, 2,6-di-nonil-4-metilfenolo; 2,4-dimetil-6-(1'-metilundec-1'-il)fenolo; 2 ,4-dimetil-6-(1'-metileptadec-1'—il)fenolo; 2,4-dimetil-6- (1'-metiltridec-1'-il)fenolo; e loro miscele. 1.1 Alkylated monophenols such as, for example: 2,6-dit-butyl-4-methylphenol; 2-t-butyl-4,6-dimethylphenol; 2.6-di-t-butyl-4-ethylphenol; 2,6-di-t-butyl-4-n-butylphenol; 2,6-di-t-butyl-4-isobutylphenol; 2,6-dicyclopentyl-4-methylphenol; 2- (α-methylcyclohexyl) -4.6-dimethylphenol; 2, 6-dioctadecyl-4-methylphenol; 2.4.6-tricyclohexylphenol; 2,6-di-t-butyl-4-methoxymethylphenol; linear or branched alkyl chain nonylphenols such as, for example, 2,6-di-nonyl-4-methylphenol; 2,4-dimethyl-6- (1'-methylundec-1'-yl) phenol; 2, 4-dimethyl-6- (1'-methylheptadec-1'-yl) phenol; 2,4-dimethyl-6- (1'-methyltridec-1'-yl) phenol; and their mixtures.

1.2 Alchiltiometilfenoli come, ad esempio: 2,4-diottiltiometil-6-t-butilfenolo; 2,4-diottiltiometil-6-metilfenolo; 2,4-diottiltiometil-6-etilfenolo; 2,6-didodeciltiometil-4-nonilfenolo. 1.2 Alkylthiomethylphenols such as, for example: 2,4-dioctylthiomethyl-6-t-butylphenol; 2,4-dioctylthiomethyl-6-methylphenol; 2,4-dioctylthiomethyl-6-ethylphenol; 2,6-didodecylthiomethyl-4-nonylphenol.

1-3 Idrochinoni ed idrochinoni alchilati come, ad esempio: 2,6-di-t-butil-4-metossifenolo; 2,5-di-tbutilidrochinone; 2,5-di-t-amilidrochinone; 2,6-difenil-4-ottadecilossifenolo; 2,6-di-t-butilidrochinone; 2,5-di-t-butil-4-idrossianisolo; 3,5-di-t-butil-4-idrossianisolo; 3,5-di-t-butil-4-idrossifenil stearato; bis (3,5-di-t-butil-4-idrossifenil)adipato. 1-3 hydroquinones and alkylated hydroquinones such as, for example: 2,6-di-t-butyl-4-methoxyphenol; 2,5-di-tbutylhydroquinone; 2,5-di-t-amylhydroquinone; 2,6-diphenyl-4-octadecyloxyphenol; 2,6-di-t-butylhydroquinone; 2,5-di-t-butyl-4-hydroxyanisole; 3,5-di-t-butyl-4-hydroxyanisole; 3,5-di-t-butyl-4-hydroxyphenyl stearate; bis (3,5-di-t-butyl-4-hydroxyphenyl) adipate.

1.4 Tocoferoli come, ad esempio: α-tocoferolo, βtocoferolo, γ-tocoferolo, δ-tocoferolo e loro miscele (Vitamina E). 1.4 Tocopherols such as, for example: α-tocopherol, βtocopherol, γ-tocopherol, δ-tocopherol and their mixtures (Vitamin E).

1.5 Eteri tiodifenilici idrossilati come, ad esempio: 2,2 '-tiobis-(6-t-butil-4-metilfenolo); 2,2'-tiobis- (4-ottilfenolo); 4,4'-tiobis-(6-t-butil-3-metilfenolo); 4,4'-tiobis-(6-t-butil-2-metilfenolo); 4,4 '-tiobis-(3,6-di-s-amilfenolo); 4,4'-bis-(2,6-dimetil-4-idrossifenil)disolfuro. 1.5 Hydroxylated thiodiphenyl ethers such as, for example: 2,2 '-thiobis- (6-t-butyl-4-methylphenol); 2,2'-thiobis- (4-octylphenol); 4,4'-thiobis- (6-t-butyl-3-methylphenol); 4,4'-thiobis- (6-t-butyl-2-methylphenol); 4,4 '-thiobis- (3,6-di-s-amylphenol); 4,4'-bis- (2,6-dimethyl-4-hydroxyphenyl) disulfide.

1.6 Alchiliden-bisfenoli come, ad esempio: 2,2'-metilenebis- (6-t-butil-4-metilfenolo); 2,2'-metilenebis- (6-t-butil-4-etilfenolo); 2,2'-metilenebis[4-metil-6- (α-metilcicloesil)fenolo]; 2,2'-metilenebis (4-metìl-6-cicloesilfenolo); 2,2'-metilenebis(6-nonil-4-metilfenolo); 2,2'-metilenebis(4,6-di-t-butilfenolo); 2,2'-etilidenebis (4,6-di-t-butilfenolo); 2 ,2'-etilidenebis(6-t-butil-4-isobutilfenolo); 2,2'-metilenebis [6-(a-metilbenzil)-4-nonilfenolo]; 2,2'-metilenebis[6-(a,a-dimetilbenzil)-4-nonilfenolo]; 4,4'-metilenebis(2,6-di-t-butilfenolo); 4,4'-metilenebis (6-t-butil-2-metilfenolo); 1,1-bis-(5-t-butil-4-idrossi-2-metilfenil)butano; 2, 6-bis-(3-t-butil-5-metil--2-idrossibenzil)-4-metilfenolo; 1,1,3-tris- (5-t-butil--4-idrossi-2-metilfenil)butano; 1,1-bis (5-t-butil-4-idrossi-2-metilfenil)-3-ndodecilmercaptobutano; etilenglicole bis[3,3-bis-(3'-t-butil-4'-idrossifeni1)butirrato]; bis(3-t-butil-4-idrossi-5-metilfenil)diciclopentadiene; bis-[2-(3'-t-butil-2 '-idrossi-5'-metilbenzil)--6--t-butil- 4-metilfenil]tereftalato; l,l-bis(3,5-dimetil-2-idrossifenil)butano; 2,2-bis (3,5-di-t-butil-4-idrossifenil)propano; 2,2-bis (5-t-butil-4-idrossi-2-metilfenil)-4-n-dodecilmercaptobutano; 1,1,5,5-tetra(5-t-butil-4-idrossi-2-metilfenil)pentano. 1.6 Alkylidene-bisphenols such as, for example: 2,2'-methylenebis- (6-t-butyl-4-methylphenol); 2,2'-methylenebis- (6-t-butyl-4-ethylphenol); 2,2'-methylenebis [4-methyl-6- (α-methylcyclohexyl) phenol]; 2,2'-methylenebis (4-methyl-6-cyclohexylphenol); 2,2'-methylenebis (6-nonyl-4-methylphenol); 2,2'-methylenebis (4,6-di-t-butylphenol); 2,2'-ethylidenebis (4,6-di-t-butylphenol); 2, 2'-ethylidenebis (6-t-butyl-4-isobutylphenol); 2,2'-methylenebis [6- (a-methylbenzyl) -4-nonylphenol]; 2,2'-methylenebis [6- (a, a-dimethylbenzyl) -4-nonylphenol]; 4,4'-methylenebis (2,6-di-t-butylphenol); 4,4'-methylenebis (6-t-butyl-2-methylphenol); 1,1-bis- (5-t-butyl-4-hydroxy-2-methylphenyl) butane; 2,6-bis- (3-t-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol; 1,1,3-tris- (5-t-butyl - 4-hydroxy-2-methylphenyl) butane; 1,1-bis (5-t-butyl-4-hydroxy-2-methylphenyl) -3-ndodecylmercaptobutane; ethylene glycol bis [3,3-bis- (3'-t-butyl-4'-hydroxyphenes1) butyrate]; bis (3-t-butyl-4-hydroxy-5-methylphenyl) dicyclopentadiene; bis- [2- (3'-t-butyl-2'-hydroxy-5'-methylbenzyl) - 6 - t-butyl-4-methylphenyl] terephthalate; 1,1-bis (3,5-dimethyl-2-hydroxyphenyl) butane; 2,2-bis (3,5-di-t-butyl-4-hydroxyphenyl) propane; 2,2-bis (5-t-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecylmercaptobutane; 1,1,5,5-tetra (5-t-butyl-4-hydroxy-2-methylphenyl) pentane.

1.7 Composti benzilici contenenti Q, N o S come, ad esempio; 3,5,3 1,5'-tetra-t-butil-4,4'-diidrossidibenziletere; ottadecil-4-idrossi-3,5-dimetilbenzilmercaptoacetato; tridecil-4-idrossi-3,5-di-t-butilbenzilmercaptoacetato; tris{3,5-di-t-butil-4-idrossibenzil)ammina; bis (4-t-butil-3-idrossi-2,6-dimetilbenzil)ditiotereftalato; bis (3,5-di^t-butil-4-idrossibenzil)solfuro; isoottil-3,5-di-t-butil-4-idrossibenzilmercaptoacetato . 1.7 Benzyl compounds containing Q, N or S such as, for example; 3,5,3 1,5'-tetra-t-butyl-4,4'-dihydroxybenzylether; octadecyl-4-hydroxy-3,5-dimethylbenzyl mercaptoacetate; tridecyl-4-hydroxy-3,5-di-t-butylbenzyl mercaptoacetate; tris {3,5-di-t-butyl-4-hydroxybenzyl) amine; bis (4-t-butyl-3-hydroxy-2,6-dimethylbenzyl) dithioterephthalate; bis (3,5-di ^ t-butyl-4-hydroxybenzyl) sulfide; isooctyl-3,5-di-t-butyl-4-hydroxybenzyl mercaptoacetate.

1.8 Maionati idrossibenzilati come, ad esempio: diottadecil-2,2-bis (3,5-di-t-butil-2-idrossibenzil)-maionato; diottadecil-2- (3-t-butil-4-idrossi-5-metilbenzil)maionato; didodecilmercaptoetil-2 ,2-bis-(3,5--di--t-butil-4-idrossibenzil)malonato; bis[4-(1,1,3,-3-tetrametilbutil)fenil]-2,2-bis(3,5-di-tbutil-4-idrossibenzil)maionato . 1.8 Hydroxybenzylated maionates such as, for example: dioctadecyl-2,2-bis (3,5-di-t-butyl-2-hydroxybenzyl) -maionate; dioctadecyl-2- (3-t-butyl-4-hydroxy-5-methylbenzyl) maionate; didodecylmercaptoethyl-2, 2-bis- (3,5 - di - t-butyl-4-hydroxybenzyl) malonate; bis [4- (1,1,3, -3-tetramethylbutyl) phenyl] -2,2-bis (3,5-di-tbutyl-4-hydroxybenzyl) maionate.

1.9 Composti idrossibenzilici aromatici come, ad esempio: 1,3,5-tris(3,5-di— t-butil— 4--idrossibenzil)-2,4,6-trimetilbenzene; 1,4— bis— (3,5-di-t-butilidrossibenzil )-2,3,5,6-tetrametilbenzene; 2,4,6-tris (3,5-di-t-butil-4-idrossibenzil)fenolo. 1.9 Aromatic hydroxybenzyl compounds such as, for example: 1,3,5-tris (3,5-di— t-butyl— 4 - hydroxybenzyl) -2,4,6-trimethylbenzene; 1,4— bis— (3,5-di-t-butylhydroxybenzyl) -2,3,5,6-tetramethylbenzene; 2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) phenol.

1.10 Composti triazinici come, ad esempio: 2,4-bis (ottilmercapto)-6-(3,5-di~t-butil-4-idrossiani--lino)-1,3,5-triazina; 2-ottilmercapto-4,6-bis(3,5-di-t-butil-4-idrossianilino)-1,3,5-triazina; 2-ottilmercapto-4,6-bis (3,5-di-t-butil-4-idrossifenos— si)-1,3,5-triazina; 2,4,6-tris-(3,5-di-t-butil--4--idrossifenossi)-1,2,3-triazina; l,3,5-tris(3,5-dit-butil-4-idrossibenzil)isocianurato; 1,3,5-tris(4-t-butil-3-idrossi— 2,6— dimetilbenzil)isocianurato; 2,4,6-tris- (3,5-di-t-butil-4-idrossifeniletil)-1,3,5-triazina; l,3,5-tris(3,5-di-t-butil-4-idrossifenilpropionil)esaidro-1,3,5-triazina; 1,3,5-tris-(3,5-dicicloesil-4-idrossibenzil)isocianurato. 1.10 Triazine compounds such as, for example: 2,4-bis (octylmercapto) -6- (3,5-di ~ t-butyl-4-hydroxy-flax) -1,3,5-triazine; 2-octylmercapto-4,6-bis (3,5-di-t-butyl-4-hydroxyanilino) -1,3,5-triazine; 2-octylmercapto-4,6-bis (3,5-di-t-butyl-4-hydroxyphenos-si) -1,3,5-triazine; 2,4,6-tris- (3,5-di-t-butyl - 4 - hydroxyphenoxy) -1,2,3-triazine; 1,1,5-tris (3,5-dit-butyl-4-hydroxybenzyl) isocyanurate; 1,3,5-tris (4-t-butyl-3-hydroxy— 2,6— dimethylbenzyl) isocyanurate; 2,4,6-tris- (3,5-di-t-butyl-4-hydroxyphenylethyl) -1,3,5-triazine; 1,3,5-tris (3,5-di-t-butyl-4-hydroxyphenylpropionyl) hexahydro-1,3,5-triazine; 1,3,5-tris- (3,5-dicyclohexyl-4-hydroxybenzyl) isocyanurate.

1.11 Benzilfosfonati come, ad esempio: dimetil-2,5-di-t-butil-4-idrossibenzilfosfonato; dietil-3,5-dit-butil^4-idrossibenzilfosfonato; diottadecil-3, 5-di-t-butil-4-idrossibenzilfosfonato; diottadecil-5-t-butil-4-idrossi-3-metilbenzilfosfonato; sali di calcio dell'estere monoetilico dell'acido 3,5-di-tbutil-4-idrossibenzilfosfonico. 1.11 Benzylphosphonates such as, for example: dimethyl-2,5-di-t-butyl-4-hydroxybenzylphosphonate; diethyl-3,5-dit-butyl ^ 4-hydroxybenzylphosphonate; dioctadecyl-3,5-di-t-butyl-4-hydroxybenzylphosphonate; dioctadecyl-5-t-butyl-4-hydroxy-3-methylbenzylphosphonate; calcium salts of the monoethyl ester of 3,5-di-tbutyl-4-hydroxybenzylphosphonic acid.

1.12 Acilamminofenoli come, ad esempio: 4-idrossilauranilide; 4-idrossistearanilide; ottil-N- (3,5-di-t-butil-4-idrossifenil)carbammato . 1.12 Acylaminophenols such as, for example: 4-hydroxyl uranilide; 4-hydroxystearanilide; octyl-N- (3,5-di-t-butyl-4-hydroxyphenyl) carbamate.

1.13 Esteri dell'acido β-(3,5-di-t-butif-4-idrossifenil)propionico con alcooli monoidrici o poliidrici come, ad esempio: metanolo, etanolo, n-ottanolo, i-ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, glicole etilenico, 1,2-propandiolo, glicole neopentilico, glicole tiodietilenico, glicole dietilenico, glicole trietilenico, pentaeritritolo, tris(idrossietil) isocianurato, N,N'-bis-(idrossietil)ossammide, 3-tioundecanolo, 3-tiopentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfo-2,6,7-triossabiciclo [2.2.2]-ottano. 1.13 Esters of β- (3,5-di-t-butif-4-hydroxyphenyl) propionic acid with monohydric or polyhydric alcohols such as, for example: methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6 -hexanediol, 1,9-nonandiol, ethylene glycol, 1,2-propandiol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis- (hydroxyethyl) oxamide, 3-thioundecanol, 3-thiopentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-1-phospho-2,6,7-trioxabicyclo [2.2.2] -octane.

1.14 Esteri dell'acido.{3-(5-t-butil-4-idrossi-3-metilfenil)propionico con alcooli monoidrici o poliidrici come, ad esempio: metanolo, etanolo, n-ottanolo, i-ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, glicole etilenico, 1,2-propandiolo, glicole neopentilico, glicole tiodietilenico, glicole dietilenico, glicole trietilenico, pentaeritritolo, tris(idrossietil) isocianurato, N,N'-bis-(idrossietil)ossammide, 3-tioundecanolo, 3-tiopentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfo-2,6,7-triossabiciclo[2.2.2]-ottano. 1.14 Acid esters. {3- (5-t-butyl-4-hydroxy-3-methylphenyl) propionic with monohydric or polyhydric alcohols such as, for example: methanol, ethanol, n-octanol, 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-thioundecanol, 3-thiopentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-1-phospho-2,6,7-trioxabicyclo [2.2.2] -octane.

1.15 Esteri dell'acido J3-(3,5-dicicloesil-4-idrossifenil)propionico con alcooli monoidrici o poliidrici come, ad esempio: metanolo, etanolo, n-ottanolo, i-ottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, glicole etilenico, 1,2-propandiolo, glicole neopentilico, glicole tiodietilenico, glicole dietilenico, glicole trietilenico, pentaeritritolo, tris(idrossietil) isocianurato, Ν,Ν'-bis-(idrossietil)ossammide, 3-tioundecanolo, 3-tiopentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfo-2,6,7-triossabiciclo [2.2.2]-ottano. 1.15 Esters of J3- (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid with monohydric or polyhydric alcohols such as, for example: methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexandiol, 1 , 9-nonandiol, ethylene glycol, 1,2-propandiol, neopentyl glycol, thiodethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, Ν, Ν'-bis- (hydroxyethyl) oxamide, 3-thioundecanol, 3-thiopentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-1-phospho-2,6,7-trioxabicyclo [2.2.2] -octane.

1.16 Esteri dell'acido 3,5-di-t-butil-4-idrossifenil)acetico con alcooli monoidrici o pòliidrici come, ad esempio: metanolo, etanolo, n-ottanolo, iottanolo, ottadecanolo, 1,6-esandiolo, 1,9-nonandiolo, glicole etilenico, 1,2-propandiolo, glicole neopentilico, glicole tiodietilenico, glicole dietilenico, glicole trietilenico, pentaeritritolo, tris (idrossietil) isocianurato, N,N'-bis(idrossietil)ossammide, 3-tioundecanolo, 3-tiopentadecanolo, trimetilesandiolo, trimetilolpropano, 4-idrossimetil-l-fosfo-2,6,7-triossabiciclo [2.2.2]ottano. 1.16 Esters of 3,5-di-t-butyl-4-hydroxyphenyl) acetic acid with monohydric or polyhydric alcohols such as, for example: methanol, ethanol, n-octanol, octanol, octadecanol, 1,6-hexandiol, 1, 9-nonandiol, ethylene glycol, 1,2-propandiol, neopentyl glycol, thiodethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thioundecanol, 3- thiopentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-1-phospho-2,6,7-trioxabicyclo [2.2.2] octane.

1.17 Ammidi dell'acido β-(3,5-di-t-butil-4-idrossifenil)propionico come, ad esempio: Ν,Ν'-bis(3,5-di-t-butil-4-idrossifenilpropionil)esameti--lenediammina; N,N'-bis(3,5-di-t-butil--4— idrossifenilpropionil)-trimetilenediammina; N,Ν'— bis(3,5-di-t-butil-4-idrossifenilpropionil)idrazina . 1.17 Amides of β- (3,5-di-t-butyl-4-hydroxyphenyl) propionic acid such as, for example: Ν, Ν'-bis (3,5-di-t-butyl-4-hydroxyphenylpropionyl) hexametes --lenediamine; N, N'-bis (3,5-di-t-butyl - 4-hydroxyphenylpropionyl) -trimethylenediamine; N,'— bis (3,5-di-t-butyl-4-hydroxyphenylpropionyl) hydrazine.

1.18 Acido ascorbico (vitamina C). 1.18 Ascorbic acid (vitamin C).

1.19 Antiossidanti amminici come, ad esempio, Ν,Ν'-di-isopropil-p-fenilenediammina; Ν,Ν'-di-s-butil-pfenilenediammina; N ,N'-bis(1,4-dimetilpentil-p-fenilenediammina; N,N'-bis(l-etil-3-metilpentil-p-fenilenediammina; N,N'-bis(1-metileptil-p-fenilenediammina; N,N'-dicicloesil-p-fenilenediammina; Ν,Ν'-difenil-p-fenilenediammina; N,N'-bis (2-naftil)-pfenilenediammina; N-isopropil-N'-fenil-p-feni lenediammina; N-(1,3-dimetilbutil)-N'-fenil-p-fenilenediammina; N-(1-metileptil)-N'-fenil-p-fenilenediammina; N-cicloesil-N'-fenil-p-fenilenediammina; 4-(p-toluenesulfamoil)difenileneammina; N,N'-dimetil-N,N'-di-s-butil-p-fenilenediammina; difenilammina; N-allildifenilammina; 4-isopropossidifenilammina; N-fenil-l-naftilammina; N-(4-t-ottilfenil)1-naftilammina; N-fenil-2-naftilamniina; difenilammina ottilata quale, ad esempio, p,p' -di-t-ottildifenilammina; 4-n-butilamminofenolo; 4-butirrilamminofenolo; 4-nonanoilamminofenolo; 4-dodecanoilamminofenolo; 4-ottadecanoilamminofenolo; bis(4-metossifenil)ammina; 2, 6-di-t-butil-4-dimetilamminometilfenolo; 2,4'-diamminodifenilmetano; 4,4'-diamminodifenilmetano; N,N,N' ,N'-tetrametil-4,4'-diamminodifenilmetano; 1,2-bis[(2-metilfenil)ammino]etano; 1,2-bis (fenilammino)propano; (o-tolil)biguanide; bis [4-(1',3'-dimetilbutil)fenil]ammina; N-fenil-lnaftilammina t-ottilata; miscela di t-butil/t-ottildifenilammine mono- e dialchilate; miscela di nonildifenilammine mono- e dialchilate; miscela di dodecildifenilammine mono- e dialchilate; miscela di isopropil/isoesildifenìlammine mono- e dialchilate; miscela di t-butildifenilammine mono- e dialchilate; 2,3-diidro-3,3-dimetil-4H-l,4-benzotiazina; fenotiazina; miscela di t-butil/t-ottilfenotiazine mono- e dialchilate; miscela di t-ottilfenotiazine mono- e dialchilate; N-allil-fenotiazina; N,N,N',N'-tetrafenil— 1,4— diamminobut— 2— ene; N,N-bis (2,2,6,6-tetrametil-piperid-4-il-esametile— nediammina; bis (2,2,6,6-tetrametilpiperid-4-il)sebacato; 2,2,6,6-tetrametilpiperidin-4-one; 2,2,6,6-tetrametilpiperidin-4-olo. 1.19 Amine antioxidants such as, for example, Ν, Ν'-di-isopropyl-p-phenylenediamine; Ν, Ν'-di-s-butyl-pphenylenediamine; N, N'-bis (1,4-dimethylpentyl-p-phenylenediamine; N, N'-bis (1-ethyl-3-methylpentyl-p-phenylenediamine; N, N'-bis (1-methylheptyl-p-phenylenediamine ; N, N'-dicyclohexyl-p-phenylenediamine; Ν, Ν'-diphenyl-p-phenylenediamine; N, N'-bis (2-naphthyl) -pphenylenediamine; N-isopropyl-N'-phenyl-p-phenylenediamine ; N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine; N- (1-methylheptyl) -N'-phenyl-p-phenylenediamine; N-cyclohexyl-N'-phenyl-p-phenylenediamine; 4- (p-toluenesulfamoyl) diphenyleneamine; N, N'-dimethyl-N, N'-di-s-butyl-p-phenylenediamine; diphenylamine; N-allyldiphenylamine; 4-isopropoxy diphenylamine; N-phenyl-1-naphthylamine; N - (4-t-octylphenyl) 1-naphthylamine; N-phenyl-2-naphthylamine; octyl diphenylamine such as, for example, p, p '-di-t-octyldiphenylamine; 4-n-butylaminophenol; 4-butyrylaminophenol; 4- nonanoylaminophenol; 4-dodecanoylaminophenol; 4-octadecanoylaminophenol; bis (4-methoxyphenyl) amine; 2, 6-di-t-butyl-4-dimethylaminomethylphenol; 2,4'-diaminodiphenylmethane; 4,4'-diaminodiphenylmethane; N, N, N, N ', N' -tetramethyl-4,4'-diaminodiphenylmethane; 1,2-bis [(2-methylphenyl) amino] ethane; 1,2-bis (phenylamino) propane; (o-tolyl) biguanide; bis [4- (1 ', 3'-dimethylbutyl) phenyl] amine; T-octylated N-phenyl-lnaphthylamine; mixture of mono- and dialkylated t-butyl / t-octyldiphenylamines; mixture of mono- and dialkylated nonyldiphenylamines; mixture of mono- and dialkylated dodecyldiphenylamines; mixture of mono- and dialkylated isopropyl / isohexydiphenylamines; mixture of mono- and dialkylated t-butyldiphenylamines; 2,3-dihydro-3,3-dimethyl-4H-1,4-benzothiazine; phenothiazine; mixture of mono- and dialkylated t-butyl / t-octylphenothiazines; mixture of mono- and dialkylated t-octylphenothiazines; N-allyl-phenothiazine; N, N, N ', N'-tetraphenyl— 1,4— diaminobut— 2— ene; N, N-bis (2,2,6,6-tetramethyl-piperid-4-yl-hexamethyl-nediamine; bis (2,2,6,6-tetramethylpiperid-4-yl) sebacate; 2,2,6, 6-tetramethylpiperidin-4-one; 2,2,6,6-tetramethylpiperidin-4-ol.

2. Stabilizzanti ai raggi ultravioletti ed alla luce. 2. Ultraviolet and light stabilizers.

2.1 Derivati di 2- (21-idrossifenil)benzotriazoli come, ad esempio: 2-(2’-idrossi-5'metilienil)benzotriazolo; 2—(3’,51-di-t-butil-2'-idrossifenil)benzotrìazolo; 2- (51-t-butil-21-idrossifenil)benzotriazolo; 2- [2'-idrossi-5'-(1,1,3,3-tetrametilbutil)fenil]benzotriazolo; 2-(3',5'— di-t-butil— 2'— idrossifenil)-5-clorobenzotriazolo; 2- (3'-t-butil-2'-idrossi-5 '-metilienil)-5-clorobenzotriazolo; 2-(31-sec-butil-5 '-t-butil-2'-idrossifenil)benzotriazolo; 2-(2'-idrossi-4'-ottilossifenil)benzotriazo— lo; 2-(3',51-di-t-amil-2'-idrossifenil)benzotriazolo; 2-[3',5'-bis(α,α-dimetilbenzil)-2'-idrossifenil]benzotriazolo; miscele di 2-[3'--t— butil— 2'— idrossi-5 '-(2-ottilossicarboniletil)fenil)-5-clorobenzotriazolo, 2-[3’— t--butil-5 (2-(2-etìlesilossi)carboniletil)-2 '-idrossifenil]-5-clorobenzotriazolo, 2- [3'-t-butil-21-idrossi-5'-(2-metossicarboniletil)fenil]--5-clorobenzotriazolo, 2- [3'-t-butil-2'-idrossi-5 '-(2-metossicarboniletil)fenil]benzotriazolo, 2-[3'-t-butil-2'-idrossi-5'-(2-ottilossicarboniletil)fenil]benzotriazolo, 2- [3'-t-butil-5'-(2- (2-etilesilossi)carboniletil)-2'-idrossife--nil)benzotriazolo, 2-(3'-dodecil-2'-idrossi-5'-metilfenil)benzotriazolo e 2-[31-t-butil-21-idrossi-5'-{2-isoottilossicarboniletil)fenil]benzotriazolo, 2,2'--metilenebis- [4-(1,1,3,3-tetrametilbutil)--6--benzotriazol-2-il-fenolo]; prodotto di transesterificazione del 2-[31-t-butil-5’-(2-metossicarboniletil)-2'-idrossifenil]-2H-benzotriazolo con il polietilene glicole 300; 2.1 Derivatives of 2- (21-hydroxyphenyl) benzotriazoles such as, for example: 2- (2'-hydroxy-5'methylenyl) benzotriazole; 2— (3 ', 51-di-t-butyl-2'-hydroxyphenyl) benzotriazole; 2- (51-t-butyl-21-hydroxyphenyl) benzotriazole; 2- [2'-hydroxy-5 '- (1,1,3,3-tetramethylbutyl) phenyl] benzotriazole; 2- (3 ', 5'— di-t-butyl— 2'— hydroxyphenyl) -5-chlorobenzotriazole; 2- (3'-t-butyl-2'-hydroxy-5'-methylenyl) -5-chlorobenzotriazole; 2- (31-sec-butyl-5'-t-butyl-2'-hydroxyphenyl) benzotriazole; 2- (2'-hydroxy-4'-octyloxyphenyl) benzotriazoal; 2- (3 ', 51-di-t-amyl-2'-hydroxyphenyl) benzotriazole; 2- [3 ', 5'-bis (α, α-dimethylbenzyl) -2'-hydroxyphenyl] benzotriazole; mixtures of 2- [3 '- t— butyl— 2'— hydroxy-5' - (2-octyloxycarbonylethyl) phenyl) -5-chlorobenzotriazole, 2- [3'— t - butyl-5 (2- (2 -ethylsiloxy) carbonylethyl) -2 '-hydroxyphenyl] -5-chlorobenzotriazole, 2- [3'-t-butyl-21-hydroxy-5' - (2-methoxycarbonylethyl) phenyl] - 5-chlorobenzotriazole, 2- [3 '-t-butyl-2'-hydroxy-5' - (2-methoxycarbonylethyl) phenyl] benzotriazole, 2- [3'-t-butyl-2'-hydroxy-5 '- (2-octyloxycarbonethyl) phenyl] benzotriazole, 2- [3'-t-butyl-5 '- (2- (2-ethylhexyloxy) carbonylethyl) -2'-hydroxyphonyl) benzotriazole, 2- (3'-dodecyl-2'-hydroxy-5'- methylphenyl) benzotriazole and 2- [31-t-butyl-21-hydroxy-5 '- {2-isooctyloxycarbonylethyl) phenyl] benzotriazole, 2,2' - methylenebis- [4- (1,1,3,3-tetramethylbutyl ) - 6 - benzotriazol-2-yl-phenol]; transesterification product of 2- [31-t-butyl-5 '- (2-methoxycarbonylethyl) -2'-hydroxyphenyl] -2H-benzotriazole with polyethylene glycol 300;

[R-CH2CH2-COO{CH2)3-]2- in cui R = 3’-t-butil- 4-idrossi-5 '-2H-benzotriazol-2-il-fenil. [R-CH2CH2-COO {CH2) 3-] 2- wherein R = 3'-t-butyl-4-hydroxy-5 '-2H-benzotriazol-2-yl-phenyl.

2.2 Derivati di 2-idrossibenzofenoni come, ad esempio: 4-idrossi-; 4-metossi-; 4-ottilossi; 4-decilossi-; 4-dodecilossi-; 4-benzilossi-; 4,2',4'-triidrossi-; 2'-idrossi-4,4'-dimetossi. 2.2 Derivatives of 2-hydroxybenzophenones such as, for example: 4-hydroxy-; 4-methoxy-; 4-octyloxy; 4-decyloxy-; 4-dodecyloxy-; 4-benzyloxy-; 4,2 ', 4'-trihydroxy-; 2'-hydroxy-4,4'-dimethoxy.

2.3 Esteri di acidi benzoici, opzionalmente sostituiti, come, ad esempio: fenil salicilato, 4-tbutilfenil salicilato, ottilfenil salicilato, benzoli resorcinolo, bis(4-t-butilbenzoil)resorcinolo, dibenzoil resorcinolo, 2,4-di-t-butilfenil-3,5-dit-butil-4-idrossibenzoato, esadecil-3,5-di-t-butil-4--idrossibenzoato, ottadecil— 3,5— di— t--butil-4-idrossibenzoato, 2-metil— 4,6— di-t-butilfenil-3,5-di-t-butil-4-idrossibenzoato. 2.3 Esters of benzoic acids, optionally substituted, such as, for example: phenyl salicylate, 4-tbutylphenyl salicylate, octylphenyl salicylate, benzene resorcinol, bis (4-t-butylbenzoyl) resorcinol, dibenzoyl resorcinol, 2,4-di-t-butylphenyl -3,5-dit-butyl-4-hydroxybenzoate, hexadecyl-3,5-di-t-butyl-4 - hydroxybenzoate, octadecyl— 3,5— di— t - butyl-4-hydroxybenzoate, 2-methyl - 4,6— di-t-butylphenyl-3,5-di-t-butyl-4-hydroxybenzoate.

2.4 Acrilati come, ad esempio, étil od isottil aciano-β,β-difenilacrilato; metil· a-carbometossicinnamato, metil o butil a-ciano-p-metil-p-metossicinnamato, metil a-carbometossi-p-metossicinnamato, N-(p-carbometossi-p-cianovinil)-2-metilindolina. 2.5 Composti del nichel come, ad esempio, complessi del 2,2’-tio-bis-[4-(l,l,3,3-tetrametilbutil )fenolo], ad esempio complessi 1:1 o 1:2, con o senza leganti addizionali come n-butilammina, trietanolammina o N-cicloesildietanolammina, nichel dibutilditiocarbammato, sali di nichel di esteri monoalchilici .dell·'acido 4-idrossi-3,5-di-t-butil-benzilfosfonico, come esteri metilici o etilici, complessi del nichel con chetossime come .2-idrossi-4-metilfenil undecil chetossima, complessi del nichel di l-fenil-4-lauroil-5-idrossipirazolo con o senza leganti addizionali. 2.4 Acrylates such as, for example, ethyl or isoctyl aciano-β, β-diphenylacrylate; methyl a-carbomethoxycinnamate, methyl or butyl a-cyano-p-methyl-p-methoxycinnamate, methyl a-carbomethoxy-p-methoxycinnamate, N- (p-carbomethoxy-p-cyanovinyl) -2-methylindoline. 2.5 Nickel compounds such as, for example, complexes of 2,2'-thio-bis- [4- (1,1,3-tetramethylbutyl) phenol], for example 1: 1 or 1: 2 complexes, with or without additional ligands such as n-butylamine, triethanolamine or N-cyclohexyldiethanolamine, nickel dibutyldithiocarbamate, nickel salts of monoalkyl esters of 4-hydroxy-3,5-di-t-butyl-benzylphosphonic acid, such as methyl or ethyl esters, nickel complexes with kethoxime such as 2-hydroxy-4-methylphenyl undecyl kethoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxypyrazole with or without additional ligands.

2.6 Ammine stericamente impedite come, ad esempio: poli-metilpropil--3--ossi- [4-(2,2,6,6-tetrametil)-piperidinil]silossano, poli-metilpropil-3-ossi- [4(1,2,2,6,6-pentametil)-piperidinil]silossano, bis-(2,2,6,6--tetrametil--4--piperidil)sebacato; bis--(2,2,6,6-tetrametil-4-piperidil)succinato; bis (1,-2.2.6.6-pentametil-4-piperidil)sebacato; bis (1-ottilossi— 2,2,6,6— tetrametil— 4-piperidil)sebacato; bis(1,2,2,6,6-pentametil--4— piperidil)n-butil-3,5-di-t-butil-4-idrossi-benzilmalonato; prodotto di condensazione tra la 1-(2-idrossietil)-2,2,6,6-tetra-4-idrossipiperidina e l'acido succinico; prodotto di condensazione tra la Ν,Ν'-bis(2,2,6,6-tetrametil-4-piperidil)esametilendiammina e la 4-tottilammìno-2,6-dicloro-l,3,-5-triazina; tris(2,2,-6.6-tetrametil-4-piperidil)-nitrilotriacetato; tetrakis (2,2,6,6-tetrametil-4-piperidil)-1,2,3,4-bu— tano-tetracarbossilato; 1,1'-(1,2-etanodiil)bis(3,-3,5,5-tetrametilpiperazinone; 4-benzoil-2,2,6,6-tetrametilpiperidina; 4-stearilossi-2,2,6,6-tetrametilpiperidina; bis (1,2,2,6,6-pentametilpiperidil)-2-n-butil-2- (2-idrossi-3,5-di-t-butilbenzil)malonato; 3-n-ottil-7,7,9,9-tetrametil-l,3,8-triazaspiro-[4.5]decan-2,4-dione; bis (l-ottilossi-2,2,6,6-tetrametilpiperidil)sebacato; bis (l-ottilossi-2,2,-6.6-tetrametilpiperidil)succinato; prodotto di condensazione tra la N,N '-bis(2,2,6,6-tetrametil-4-piperidil)esametilenediammina e la 4-morfolina-2,6dicloro-1,3,5-triazina; prodotto di condensazione tra la 2-cloro-4,6-di-(4-n-butilammino^2,2,6,6-tetrametilpiperidil)-1 ,3,5-triazina e l'l,2-bis(3-amminopropilammino)etano; prodotto di condensazione tra la 2-cloro-4, 6-di-(4-n-butilammino-l,2,2,6,6-pentametilpiperidil)-1,3,5-triazina e l'l,2-bis(3-amminopropilammino)etano; 8-acetil-3-dodecil-7,7,-9,9-tetrametil-l,3,8-triazaspiro[4.5]decano-2,4-dione; 3-dodecil-l- (2,2,6,6-tetrametil-4-piperidil)-pirrolidin-2,5-dione; 3-dodecil-l-(1,2,2,6,6-pentametil-4-piperidil)pirrolidin-2,5-dione; miscela di 4-esadecilossi- e 4-stearilossi-2,2,6,6-tetrametilpiperidina; prodotto di condensazione tra Ι'Ν,Ν'-bis (2,2,6,6-tetrametil-4-piperidil)esametilenediammina e la 4-cicloesilammino-2,6-dicloro-l,3,5-triazina; prodotto di condensazione tra l'l,2-bis(3-amminopropilammino)etano e la 2,4,6-tricloro-l,3,5-triazina, così come la 4-butilammino-2,2,6,6-tetrametilpiperidina (CAS Reg. No. [136504—96—6]; N- (2,2,6,6-tetrametil-4-piperidil)-n-dodecilsuccinimmide; N- (1,2,2,6,6-pentametil-4-piperidil)-n-dodecilsuccinimmide; 2-undecil-7,7,9,9-tetrametil-lossa-3,8-diaza-4-ossospiro [4,5]decano; prodotto di reazione tra il 7,7,9,9-tetrametil-2-cicloundecill-ossa-3,8-diaza-4-ossospiro [4,5]decano e l'epicloridrina. 2.6 Sterically hindered amines such as, for example: poly-methylpropyl - 3 - oxi- [4- (2,2,6,6-tetramethyl) -piperidinyl] siloxane, poly-methylpropyl-3-oxi- [4 (1 , 2,2,6,6-pentamethyl) -piperidinyl] siloxane, bis- (2,2,6,6 - tetramethyl - 4 - piperidyl) sebacate; bis - (2,2,6,6-tetramethyl-4-piperidyl) succinate; bis (1,2.2.6.6-pentamethyl-4-piperidyl) sebacate; bis (1-octyloxy— 2,2,6,6— tetramethyl— 4-piperidyl) sebacate; bis (1,2,2,6,6-pentamethyl-4-piperidyl) n-butyl-3,5-di-t-butyl-4-hydroxy-benzylmalonate; condensation product between 1- (2-hydroxyethyl) -2,2,6,6-tetra-4-hydroxypiperidine and succinic acid; condensation product between Ν, Ν'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-toctylamine-2,6-dichloro-1,3, -5-triazine; tris (2,2, -6.6-tetramethyl-4-piperidyl) -nitrilotriacetate; tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3,4-bu-tano-tetracarboxylate; 1,1 '- (1,2-ethanodiyl) bis (3, -3,5,5-tetramethylpiperazinone; 4-benzoyl-2,2,6,6-tetramethylpiperidine; 4-stearyloxy-2,2,6,6 -tetramethylpiperidine; bis (1,2,2,6,6-pentamethylpiperidyl) -2-n-butyl-2- (2-hydroxy-3,5-di-t-butylbenzyl) malonate; 3-n-octyl-7 , 7,9,9-tetramethyl-1,1,8-triazaspiro- [4.5] decan-2,4-dione; bis (1-octyloxy-2,2,6,6-tetramethylpiperidyl) sebacate; bis (1- octyloxy-2,2, -6.6-tetramethylpiperidyl) succinate; condensation product between N, N '-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-morpholine-2,6dichloro- 1,3,5-triazine; condensation product between 2-chloro-4,6-di- (4-n-butylamino ^ 2,2,6,6-tetramethylpiperidyl) -1, 3,5-triazine and l 1,2-bis (3-aminopropylamino) ethane; condensation product of 2-chloro-4, 6-di- (4-n-butylamino-1,2,2,6,6-pentamethylpiperidyl) -1, 3,5-triazine and 1,2-bis (3-aminopropylamino) ethane; 8-acetyl-3-dodecyl-7,7, -9,9-tetramethyl-1,3,8-triazaspiro [4.5] decane -2,4-dione; 3-dodecyl-1- (2,2,6,6-tetramethyl-4-piperidyl) -pyrrolidin-2,5-dione; 3-dodecyl-1- (1,2,2,6,6-pentamethyl-4-piperidyl) pyrrolidine-2,5-dione; mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine; condensation product between Ι'Ν, Ν'-bis (2,2,6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine; condensation product between 1,2-bis (3-aminopropylamino) ethane and 2,4,6-trichloro-1,3,5-triazine, as well as 4-butylamino-2,2,6,6- tetramethylpiperidine (CAS Reg. No. [136504—96—6]; N- (2,2,6,6-tetramethyl-4-piperidyl) -n-dodecylsuccinimide; N- (1,2,2,6,6- pentamethyl-4-piperidyl) -n-dodecylsuccinimide; 2-undecyl-7,7,9,9-tetramethyl-oxo-3,8-diaza-4-oxospyr [4,5] decane; reaction product between 7, 7,9,9-tetramethyl-2-cycloundecill-bone-3,8-diaza-4-oxospiro [4,5] decane and epichlorohydrin.

2.7 Ossammidi come, ad esempio: 4,4'-diottilossiossanilide; 2,2'-dietossiossanilide; 2,2'-diottilossi-5,5'-di-t-butossanilide; 2,2'-didodecilossi-5,5'-di-t-butossanilide; 2-etossi-2'-etilossanilide; N,N'-bis(3-dimetilamminopropil)ossammide; 2-etossi-5-t-butil-2 '-etossanilide e sue miscele con 2-etossi-2’-etil-5,4 '-di-t-butossanilide; e miscele di orto- e para-metossi anilidi disostituite e miscele di orto- e para-etossi anilidi disostituite. 2.7 Oxamides such as, for example: 4,4'-dioctyloxyoxanilide; 2,2'-diethoxyoxanilide; 2,2'-dioctyloxy-5,5'-di-t-butoxanilide; 2,2'-didodecyloxy-5,5'-di-t-butoxanilide; 2-ethoxy-2'-ethyloxanilide; N, N'-bis (3-dimethylaminopropyl) oxamide; 2-ethoxy-5-t-butyl-2 '-ethoxanilide and its mixtures with 2-ethoxy-2'-ethyl-5.4' -di-t-butoxanilide; and mixtures of disubstituted ortho- and para-methoxy anilides and mixtures of disubstituted ortho- and para-ethoxy anilides.

2.8 2-(2-idrossifenil)-1,3,5-triazine come, ad esempio: 2,4, 6-tris(2-idrossi--4— ottilossifenil)-1,3,5-triazina; 2-(2-idrossi-4-ottilossifenil)-4,6-bis(2,4-dimetilfenil)--1,3,5--trìazìna; 2- (2,4-diidrossifenil)-4,6-bis (2,4-dimetilfenil)-1,3,5-triazina; 2,4-bis-(2-idrossi-4-propilossifenil)-6-(2,4-dimetilfenil)-1,3,5-triazina; 2-(2-idrossi-4-ottilossifenil)— 4,6--bis(4-metilfenil)— 1,3,5-triazina; (2-idrossi-4-dodecilossifenil)-4,6-bis (2,4-dimetilfenil)-1,3,5-triazina; 2-[2-idrossi-4-(2-idrossi-3-butilossipropossi)fenil]-4,6-bis (2,4-dimetil)-1,3,-5-triazina; 2- [2-idrossi-4-(2-idrossi-3-ottilossipropilossi)fenil]-4,6-bis (2,4-dimetil)— 1,3,5-triazina; 2- (2-idrossi-4-tridecilossifenil)--4,6— bis-(2,4-dimetilfenil)-1,3,5-triazina; 2-[4-(dodecilossi/tridecilossi-2-idrossipropossi)-2-idrossifenil]-4.6--bis (2,4--dimetilfenil)--1,3,5— triazina; 2-[2-idrossi-4- (2-idrossi-3-dodecilossi-propossi)fenil]-4.6— bis(2,4— dimetilfenil)— 1,3,5--triazina; 2-(2-idrossi-4-esilossifenil)-4,6-difenil-l,3,5-triazina; 2- (2-idrossi-4-metossifenil)4,6-difenil-l,3,5-trìazìna; 2,4,-6--tris[2— idrossi--4--(3-butossi-2-idrossipropossi)fe-nil]-1,3,5-triazina; 2-(2-idrossifenil)-4- (4-metossifenil)-6-fenil-l,3,5-triazina. 2.8 2- (2-hydroxyphenyl) -1,3,5-triazine such as, for example: 2,4, 6-tris (2-hydroxy-4-octyloxyphenyl) -1,3,5-triazine; 2- (2-hydroxy-4-octyloxyphenyl) -4,6-bis (2,4-dimethylphenyl) - 1,3,5 - triazine; 2- (2,4-dihydroxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine; 2,4-bis- (2-hydroxy-4-propyloxyphenyl) -6- (2,4-dimethylphenyl) -1,3,5-triazine; 2- (2-hydroxy-4-octyloxyphenyl) - 4,6 - bis (4-methylphenyl) - 1,3,5-triazine; (2-hydroxy-4-dodecyloxyphenyl) -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine; 2- [2-hydroxy-4- (2-hydroxy-3-butyloxypropoxy) phenyl] -4,6-bis (2,4-dimethyl) -1,3, -5-triazine; 2- [2-hydroxy-4- (2-hydroxy-3-octyloxypropyloxy) phenyl] -4,6-bis (2,4-dimethyl) - 1,3,5-triazine; 2- (2-hydroxy-4-tridecyloxyphenyl) - 4,6— bis- (2,4-dimethylphenyl) -1,3,5-triazine; 2- [4- (dodecyloxy / tridecyloxy-2-hydroxypropoxy) -2-hydroxyphenyl] -4.6 - bis (2,4 - dimethylphenyl) - 1,3,5— triazine; 2- [2-hydroxy-4- (2-hydroxy-3-dodecyloxy-propoxy) phenyl] -4.6— bis (2,4— dimethylphenyl) - 1,3,5 - triazine; 2- (2-hydroxy-4-hexyloxyphenyl) -4,6-diphenyl-1,3,5-triazine; 2- (2-hydroxy-4-methoxyphenyl) 4,6-diphenyl-1,3,5-trinity; 2,4, -6 - tris [2— hydroxy - 4 - (3-butoxy-2-hydroxypropoxy) phenyl] -1,3,5-triazine; 2- (2-hydroxyphenyl) -4- (4-methoxyphenyl) -6-phenyl-1,3,5-triazine.

3. "Metal-deactivators " come, ad esempio: N,N-difenilossammide, N-salicilai-N'-saliciloil-idrazina, N,N'-bis (saliciloil)idrazina, N,N'-bis(3,5-di-t-butil-4-idrossifenilpropionil)idrazina, 3-saliciloilammino-1,2,4-triazolo, bis(benzilidene)ossalil diidrazide, ossanilide, isoftaloil diidrazide, sebacoil bisfenilidrazide, N,N'-diacetiladipoil diidrazide, N,N'-bis(saliciloil)ossallil diidrazide, N,N'-bis (saliciloil)tiopropionil diidrazide. 3. "Metal-deactivators" such as, for example: N, N-diphenyloxamide, N-salicylic-N'-salicyloyl-hydrazine, N, N'-bis (salicyloyl) hydrazine, N, N'-bis (3,5 -di-t-butyl-4-hydroxyphenylpropionyl) hydrazine, 3-salicyloylamino-1,2,4-triazole, bis (benzylidene) oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N, N'-diacetyladipoyl dihydrazide, N'-bis (salicyloyl) oxalyl dihydrazide, N, N'-bis (salicyloyl) thiopropionyl dihydrazide.

4. Fosfiti e fosfoniti come, ad esempio: trifenil fosfito, difenil alchil fosfiti, fenil dialchil fosfiti, tris(nonilfenil)fosfito, trilauril fosfito, triottadecil fosfito, distearil pentaeritritol difosfito, tris(2,4-di-t-butilfenil)fosfito, diisodecil pentaeritritol difosfito, bis(2,4-di-t-butilfenil)pentaeritritol difosfito, bis(2,6-di-t-butil4-metilienil)pentaeritritol difosfito, diisodecilossipentaeritritol difosfito, bis(2,4-di-t-butil-6-metilfenil)pentaeritritol difosfito, bis [2,4,6-tris(t-butilfenil)]pentaeritritol difosfito, tristearil sorbitol trifosfito, tetrakis-(2,4-di-t-butilfenil)-4,4'-difenililenedifosfonito, 6-isoottilossi-2,4,8,10-tetra-t-butil-12H-dibenzo [d,g]-l,3,2-diossafosfocina, 6-fluoro-2 ,4,-8,10-tetra-t-butil-12-metil-dibenzo [d,g]-1,3,2-diossafosfocina, bis-(2,4-di-t-butil-6-metilfenil)metilfosfito, bis(2,4-di-t-butil-6-metilfenil)etiliosfito. 4. Phosphites and phosphonites such as, for example: triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, tris (nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl pentaerythritol diphosphite, tris (2,4-di-t-butylphenyl) , diisodecyl pentaerythritol diphosphite, bis (2,4-di-t-butylphenyl) pentaerythritol diphosphite, bis (2,6-di-t-butyl4-methylenyl) pentaerythritol diphosphite, diisodecyloxypentaerythritol diphosphite, bis (2,4-di-t- butyl-6-methylphenyl) pentaerythritol diphosphite, bis [2,4,6-tris (t-butylphenyl)] pentaerythritol diphosphite, tristearyl sorbitol triphosphite, tetrakis- (2,4-di-t-butylphenyl) -4,4'- diphenylylenediphosphonite, 6-isooctyloxy-2,4,8,10-tetra-t-butyl-12H-dibenzo [d, g] -1, 3,2-dioxaphosphocin, 6-fluoro-2, 4, -8,10- tetra-t-butyl-12-methyl-dibenzo [d, g] -1,3,2-dioxaphosphocin, bis- (2,4-di-t-butyl-6-methylphenyl) methylphosphite, bis (2,4- di-t-butyl-6-methylphenyl) ethylphite.

5. Idrossilammine come, ad esempio: N,N-dibenzilidrossilammina; Ν,Ν-dietilidrossilammina; N,N-diottìlidrossilammina; N,N-dilaurilidrossilammina; N,N-ditetradecilidrossilammina, N,N-diesadecilidrossilammina; N,N-diottadecilidrossilammina ; N-esadecil-N-ottadecilidrossilammina; N-eptadecil-N-ottadecilidrossilammina; N,N-idrossilammina derivata dall'ammina del sego idrogenata. 5. Hydroxylamines such as, for example: N, N-dibenzylhydroxylamine; Ν, Ν-diethylhydroxylamine; N, N-dioctylhydroxylamine; N, N-dilaurylhydroxylamine; N, N-dithetradecylhydroxylamine, N, N-hexadecylhydroxylamine; N, N-dioctadecylhydroxylamine; N-hexadecyl-N-octadecyl hydroxylamine; N-heptadecyl-N-octadecyl hydroxylamine; N, N-hydroxylamine derived from hydrogenated tallow amine.

6. Nitroni come, ad esempio: N-benzil-α-fenilnitrone; N-etil-a-fenil-nitrone ; N-ottil-α-eptilnitrone; N-lauril-a-undecil-nitrone; N-tetradecilα-tridecil-nitrone; N-esadecil-α-pentadecil-nitrone; N-ottadecil-a-eptadecil-nitrone; N-esadecil-aeptadecil-nitrone; N-ottadecil-a-pentadecil-nitrone; N-eptadecil-a-eptadecil-nitrone; N-ottadecil-αesadecil-nitrone; nitrone derivato dall'ammina del sego idrogenata. 6. Nitrons such as, for example: N-benzyl-α-phenylnitrone; N-ethyl-a-phenyl-nitrone; N-octyl-α-heptylnitrone; N-lauryl-a-undecyl-nitrone; N-tetradecylα-tridecyl-nitrone; N-hexadecyl-α-pentadecyl-nitrone; N-octadecyl-a-heptadecyl-nitrone; N-hexadecyl-aheptadecyl-nitrone; N-octadecyl-a-pentadecyl-nitrone; N-heptadecyl-a-heptadecyl-nitrone; N-octadecyl-α-hexadecyl-nitrone; nitrone derived from hydrogenated tallow amine.

7. Tiosinergisti come, ad esempio: dilauril tiodipropionato; distearil tiodipropionato. 7. Thiosynergists such as, for example: dilauryl thiodipropionate; distearyl thiodipropionate.

8. Agenti che sono in grado di distruggere i perossidi come, ad esempio, esteri dell'acido βtiodipropionico come lauril, stearil, miristil o tridecil esteri, mercaptobenzimidazolo o sale di zinco del 2-mercaptobenzimidazolo, zinco dibutilditiocarbammato, diottadecildisolfuro, pentaeritritol tetrakis (β-dodecilmercapto)propionato. 8. Agents that are capable of destroying peroxides such as, for example, esters of βthiodipropionic acid such as lauryl, stearyl, myristyl or tridecyl esters, mercaptobenzimidazole or 2-mercaptobenzimidazole zinc salt, zinc dibutyldithiocarbamate (β-dioctolodecyldisulfide -dodecilmercapto) propionate.

9. Stabilizzanti della poliammide come, ad esempio, sali di rame in combinazione con composti dello iodio e/o del fosforo, sali del manganese divalente. 9. Stabilizers of polyamide such as, for example, copper salts in combination with iodine and / or phosphorus compounds, salts of divalent manganese.

10. Co-stabilizzanti basici come, ad esempio: melammina, polivinilpirrolidone , dicianodiammide, triallil cianurato, derivati dell'urea, derivati dell 'idrazina, ammine, poliammidi, poliuretani, sali dei metalli alcalini e sali dei metalli alcalino-terrosi di acidi grassi ad elevato peso molecolare come, ad esempio, Ca-stearato, Zn-stearato, Mg-stearato , Mg-behenato, Na-ricinoleato, K-palmitato, antimonio-pirocatecolato, stagno-pirocatecolato. 10. Basic co-stabilizers such as, for example: melamine, polyvinylpyrrolidone, dicyanodiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of fatty acids with high molecular weight such as, for example, Ca-stearate, Zn-stearate, Mg-stearate, Mg-behenate, Na-ricinoleate, K-palmitate, antimony-pyrocatecolate, tin-pyrocatecolate.

11. Agenti nucleanti come, ad esempio: sostanze inorganiche quali talco, ossidi metallici (ad esempio, diossido di titanio od ossido di magnesio), fosfati, carbonati o solfati (preferibilmente di metalli alcalino-terrosi); composti organici quali acidi mono- o policarbossilici e loro sali (ad esempio, acido 4-t-butilbenzoico, acido adipico, acido difenilacetico, succinato di sodio, benzoato di sodio); composti polimerici quali copolimeri ionici ("ionoraers"). 11. Nucleating agents such as, for example: inorganic substances such as talc, metal oxides (for example, titanium dioxide or magnesium oxide), phosphates, carbonates or sulphates (preferably of alkaline earth metals); organic compounds such as mono- or polycarboxylic acids and their salts (for example, 4-t-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate, sodium benzoate); polymeric compounds such as ionic copolymers ("ionoraers").

12. Cariche ed agenti rinforzanti come, ad esempio: carbonato di calcio, silicati, fibre di vetro, amianto, talco, caolino, mica, solfato di bario, ossidi ed idrossidi metallici, nero fumo, grafite, farina di legno e farine o fibre di altri prodotti naturali, fibre sintetiche. 12. Fillers and reinforcing agents such as, for example: calcium carbonate, silicates, glass fibers, asbestos, talc, kaolin, mica, barium sulphate, metal oxides and hydroxides, carbon black, graphite, wood flour and flours or fibers of other natural products, synthetic fibers.

13. Altri additivi come, ad esempio: plastificanti, lubrificanti, emulsionanti, pigmenti, additivi reologici, catalizzatori, agenti di scivolamento, brillantanti ottici, agenti antifiammma (ad esempio, bromurati, clorurati, fosforati e misti fosforo/alogeni), agenti antistatici, agenti di espansione . 13. Other additives such as, for example: plasticizers, lubricants, emulsifiers, pigments, rheological additives, catalysts, sliding agents, optical brighteners, anti-inflammatory agents (e.g. brominated, chlorinated, phosphorated and mixed phosphorus / halogens), antistatic agents, expansion agents.

11. Benzofuranonì ed indolinoni come, ad esempio: 3-[4- (2-acetossietossi)fenil]-5,7-di-t-butil-benzofuran-2-one; 5,7-di-t-butil-3- [4-(2-stearoilossietossi)fenil]benzofuran-2-one; 3,3'-bis[5,7-di-tbutil--3— [4-(2-idrossietossi)fenil]benzofuran— 2— one]; 5,7-di-t-butil-3-(4-etossifenil)benzofuran-2-one; 3- (4-acetossi-3,5-dimetilfenil)-5,7-di-t-butil-benzofuran-2-one; 3-(3,5-dimetil-4-pivaloilossifenil)-5,7-di-t-butil-benzofuran-2-one; oppure quelli descritti nei brevetti USA No 4,325,863, 4,338,244, 5,175,312, 5,216,052 e 5,252,643; nei brevetti tedeschi DE 4,316,611, 4,316,622 e 4,316,876; o nelle domande di brevetto europeo No. 11. Benzofuranones and indolinones such as, for example: 3- [4- (2-acetoxyethoxy) phenyl] -5,7-di-t-butyl-benzofuran-2-one; 5,7-di-t-butyl-3- [4- (2-stearoyloxyethoxy) phenyl] benzofuran-2-one; 3,3'-bis [5,7-di-tbutyl - 3— [4- (2-hydroxyethoxy) phenyl] benzofuran— 2— one]; 5,7-di-t-butyl-3- (4-ethoxyphenyl) benzofuran-2-one; 3- (4-acetoxy-3,5-dimethylphenyl) -5,7-di-t-butyl-benzofuran-2-one; 3- (3,5-dimethyl-4-pivaloyloxyphenyl) -5,7-di-t-butyl-benzofuran-2-one; or those described in US Patent Nos. 4,325,863, 4,338,244, 5,175,312, 5,216,052 and 5,252,643; in German patents DE 4,316,611, 4,316,622 and 4,316,876; or in European patent applications No.

589,839 e 591,102. 589.839 and 591.102.

Allo scopo di meglio comprendere la presente invenzione e per mettere in pratica la stessa, vengono di seguito riportati alcuni esempi illustrativi ma non limitativi della presente invenzione. In order to better understand the present invention and to put it into practice, some illustrative but not limitative examples of the present invention are given below.

ESEMPIO 1 EXAMPLE 1

60 g di ottadecil-3-(3',5'-dì-t-butil-4'-idrossifenil)propionato (Anox PP18 della Great Lakes, sottoforma di polvere fine avente dimensioni < 50 μπι, vengono fusi ad una temperatura compresa tra 50°C e 60 DC. Successivamente, vengono aggiunti 40 g di tetrakis [3-(3,5-di-t-butil-4-idrossi-fenil)-propionilossimetil ]metano (Anox 20 della Great Lakes), sottoforma di polvere fine avente dimensioni < 50 μπι: il tutto viene mantenuto a temperatura compresa tra 50°C e 60°C fino a completa omogenizzazione. 60 g of octadecyl-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate (Anox PP18 from Great Lakes, in the form of fine powder having dimensions <50 μπι, are melted at a temperature between 50 ° C and 60 DC. Subsequently, 40 g of tetrakis [3- (3,5-di-t-butyl-4-hydroxy-phenyl) -propionyloxymethyl] methane (Anox 20 from Great Lakes) are added, in the form of powder fine with dimensions <50 μπι: the whole is kept at a temperature between 50 ° C and 60 ° C until complete homogenization.

La miscela liquida ottenuta viene lasciata raffreddare a temperatura ambiente ottenendosi un solido che viene successivamente macinato. The liquid mixture obtained is left to cool to room temperature, obtaining a solid which is subsequently ground.

Si ottiene una polvere che viene sottoposta ad analisi al DSC ("Differential Scanning Calorimetry") ed il risultato ottenuto viene riportato in Fig. 1. A powder is obtained which is subjected to analysis by DSC ("Differential Scanning Calorimetry") and the result obtained is reported in Fig. 1.

La polvere ottenuta viene, inoltre, sottoposta ad analisi ai Raggi X e lo spettro da polveri ottenuto viene riportato in Fig. 2. Lo spettro di diffrazione di Raggi X da polveri viene effettuato utilizzando la radiazione Cu-Κα (λ = 1,54178). The powder obtained is also subjected to X-ray analysis and the spectrum from powders obtained is shown in Fig. 2. The X-ray diffraction spectrum from powders is carried out using Cu-Κα radiation (λ = 1.54178) .

La Fig. 1 mostra chiaramente che la miscela ottenuta ha un picco di fusione intorno a 50°C, vicino al punto di fusione dell'ottadecil-3-(3',5'-dit-butil-4'-idrossifenil)propionato. Al contrario, il punto di fusione del tetrakis [3-{3,5-di-tbutil-4-idrossifenil)propionìlossimetil]metano non viene rilevato: infatti, la Fig. 1, non mostra alcun picco endotermico di fusione intorno a 110°C-125°C caratteristico del tetrakis [3-(3,5-di-tbutil-4-idrossìfenil)propionilossimetil]metano . La Fig. 2 mostra che il tetrakis [3-(3,5-di-tbutil--4--idrossifenil)propionilossimetil]metano è presente in forma cristallina (così come l'ottadecil-3- (3',5'-di-t-butil-4'-idrossifenil)propionato) ed in particolare, in questo caso, è presente nella sua forma β. Fig. 1 clearly shows that the obtained mixture has a melting peak around 50 ° C, close to the melting point of octadecyl-3- (3 ', 5'-dit-butyl-4'-hydroxyphenyl) propionate. On the contrary, the melting point of tetrakis [3- {3,5-di-tbutyl-4-hydroxyphenyl) propionyloxymethyl] methane is not detected: in fact, Fig. 1 does not show any endothermic melting peak around 110 ° C-125 ° C characteristic of tetrakis [3- (3,5-di-tbutyl-4-hydroxyphenyl) propionyloxymethyl] methane. Fig. 2 shows that tetrakis [3- (3,5-di-tbutyl - 4 - hydroxyphenyl) propionyloxymethyl] methane is present in crystalline form (as well as octadecyl-3- (3 ', 5'- di-t-butyl-4'-hydroxyphenyl) propionate) and in particular, in this case, it is present in its β form.

Claims

CLAIMS 1. Stabilizing mixture comprising: (a) tetrakis [3- (3,5— di— t - butyl-4-hydroxyphenyl) propionyloxymethylmethane having formula (I): (I); (b) octadecyl-3- (3 ', 5'-di-t-butyl-4'-hydroxyphenyl) propionate having formula (II): (II); characterized by having a melting point between 50 ° C and 60 ° C.

2. Stabilizing mixture according to claim 1, wherein component (a) having formula (I) and component (b) having formula (II) are used in a ratio ranging from 9: 1 to 1: 9.

3. Stabilizing mixture according to claim 2, wherein component (a) having formula (I) and component (b) having formula (II) are used in a ratio of between 3: 1 and 1: 3.

4. Polymeric compositions containing an organic polymer and an effective amount of the stabilizing mixture according to any one of the preceding claims.

5. Polymeric compositions according to claim 4, wherein the stabilizing mixture is used in combination with other stabilizers or mixtures thereof.

6. Use of the stabilizing mixture according to any one of claims 1 to 3, as a stabilizer to the oxidative degradation caused by light and / or heat of organic polymers.

7. Products obtained from the processing of the polymeric compositions according to claim 4 or 5.