HK1068361B - Novel polymer blends - Google Patents

Description

Novel polymer blends

The present application relates to novel thermoplastic polymer mixtures comprising polycarbonate, mold release agents and specific phosphites, and to the use of these polymer mixtures for producing molded articles, in particular optical data carriers, for example compact discs, video discs, digital versatile discs and other optical data carriers which can be written and erased one or more times, and also to the molded articles produced therefrom, see above.

Polycarbonates are generally used as injection-molded or injection-molded materials for optical data carriers in view of their special combination of properties, such as transparency, heat resistance and dimensional stability. To improve the processability of a disc at 300 ℃ to 400 ℃, additives such as mold release agents and stabilizers are added to the polycarbonate.

Aliphatic fatty acid esters of polyhydric alcohols, such as esters of glycerol with long-chain fatty acids and esters of pentaerythritol with long-chain fatty acids, are preferably used as mold release agents. These esters can also be partially esterified, in which case they have free hydroxyl groups which are clearly advantageous for the mold release action, but these esters impair the thermal stability of the mixture and therefore make it necessary to add stabilizers. However, the stabilizer must be very effective, i.e. must be effective at very low levels, otherwise there is a risk of coating formation in the mould. In this case, the mold and die must be cleaned frequently in the process, which is disadvantageous, and results in inferior sheets. In contrast, fully esterified mold release agents, although having a higher stability, have a much weaker mold release at low contents than esters having free hydroxyl groups. Therefore, in general, larger amounts of fully esterified mold release agents are used which increase the risk of coating formation, whereas the amount of stabilizer added can be somewhat smaller.

Many mixtures have been proposed in the literature, for example:

EP-A205192 describes the use of mixtures of trimethyl phosphate and/or triethyl phosphate with phosphites in order to stabilize mixtures containing OH groups. The stabilization of the individual phosphates or phosphites is inadequate and these phosphates are ecologically harmful.

JP-A62184639 describes optical data storage media made of polycarbonate stabilized with phosphites. Volatile phosphites, such as trimethyl phosphite, which are ecologically harmful and are very demanding in terms of the formation of coatings, are preferred.

JP-A2000080261 describes polycarbonate mixtures containing mold release agents, tris (di-tert-butylphenyl) phosphite and phosphoric acid. The stabilizing action of phosphites is therefore inadequate, so that phosphoric acid is used as further stabilizer, but it can cause corrosion of the storage layers of optical data carriers at high air humidity and at higher temperatures.

The object of the present invention was therefore to develop thermoplastic polymer mixtures comprising polycarbonate, mold release agents and heat stabilizers which are suitable for the production of optical data carriers and other moldings, in other words, for example, have good mold release with relatively low amounts. In particular, new models such as Digital Versatile Disks (DVDs) with higher storage capacity and optionally thinner disk thickness require higher thermal stability than CDs. There are more stringent requirements on damage to the material during processing into a molded article and the formation of a coating in the mold.

This object is surprisingly achieved with the mixtures according to the invention by improving the quality of the data memory and also by improving the processability of the material during injection molding or injection-compression molding.

The present application therefore relates to a thermoplastic polymer mixture comprising at least one polycarbonate, at least one mold release agent and at least one phosphite having a specific chemical structure. The phosphites stabilize the mold release agents present even at low concentrations, so that the dosage of mold release agents with the same mold release action can be reduced. Thus, the formation of a coating is reduced to a surprisingly low level, which is due to both the reduced amount of release agent and the surprisingly increased stability of the release agent.

The invention also relates to the use of these polymer mixtures for the production of optical data carriers, such as compact discs, video discs, digital versatile discs and other optical data carriers which can be written and erased one or more times, and to optical data carriers produced from the polymer mixtures.

The invention also relates to an optical data carrier comprising the above thermoplastic polymer mixture, wherein the release agent is a polyol and C_16-22Esters of long-chain carboxylic acids, and which also contain at least one free OH group.

The invention also relates to the optical data carrier, wherein, relative to the weight of the mixture, the optical data carrier contains 0.01-1.5 wt% of release agent and 0.001-0.1 wt% of phosphite ester.

It is clear that the polymer blends are also suitable for use in other conventional polycarbonate applications, including those utilizing polycarbonates having a higher molecular weight. These applications may be transparent or opaque, for example food and beverage packaging, optical lenses and prisms, lenses for lighting, automotive headlight lenses, architectural transportation vehicles and automotive glazings, various types of glazings such as for greenhouses, so-called bridging double wall sheets or hollow cavity sheets. Other examples of applications are profiles, films, housings of various types, such as for medical instruments, household appliances, such as juice presses, coffee machines, mixers, etc., office appliances, such as computers, monitors, printing machines, copiers, etc., sheets, tubes, electrical equipment ducts, windows, doors and profiles for the building industry, interior and exterior applications; for applications in the field of electrical engineering such as switches and plugs. The moldings according to the invention can also be used for the interior trim and parts of trains, ships, aircraft, buses and other transport vehicles and for truck body parts.

The thermoplastic polymer mixtures within the scope of the present invention contain predominantly aromatic polycarbonates. The term polycarbonate includes homopolycarbonates and copolycarbonates; the polycarbonates may be linear or branched in the known sense. They have a weight average molecular weight of 5,000 to 80,000, preferably 10,000 to 40,000, as determined by gel permeation chromatography. Particularly preferred molecular weights are from 15,000 to 35,000, in particular from 15,000 to 22,000.

These polycarbonates are prepared in a known manner from diphenols, carbonic acid derivatives, optionally chain terminators and optionally branching agents.

For about 40 years, details on the preparation of polycarbonates have been published in numerous patents. See, e.g., Schnell, "Chemistry and Physics of Polycarbonates" (polycarbonate Chemistry and Physics), Polymer Reviews (Polymer Reviews), Vol.9, Interscience Publishers, New York, London, Sydney 1964; Dr.Freetag, U.G., P.R.Muller, H.Nouvertne, BAYER AG, "Polycarbonates", published in Encyclopedia of Polymer science and Engineering, Vol.11, second edition, 1988, P648-718, and finally Dres.U.G., K.Kirchner and P.R.Muller, "Polycarbonates", published in Becker/Braun, Kunststoff-Handbuch (plastics handbook) Vol. 3/1, Polycarbonate, Polyacet, Polyester, Cellulosester, Carl ser Verlag, Munich, Vienna 1992, P117-299.

Diphenols suitable for the production of the polyester include, for example, hydroquinone, resorcinol, dihydroxybiphenyl, bis (hydroxyphenyl) alkane, bis (hydroxyphenyl) cycloalkane, bis (hydroxyphenyl) sulfide, bis (hydroxyphenyl) ether, bis (hydroxyphenyl) ketone, bis (hydroxyphenyl) sulfone, bis (hydroxyphenyl) sulfoxide, α - α' -bis (hydroxyphenyl) -diisopropylbenzene and ring alkylated and ring halogenated compounds thereof.

Preferred phenols include 4, 4' -dihydroxybiphenyl, 2-bis (4-hydroxyphenyl) propane, 2, 4-bis- (4-hydroxyphenyl) -2-methylbutane, 1-bis- (4-hydroxyphenyl) -p-diisopropylbenzene, 2-bis (3-methyl-4-hydroxyphenyl) propane, 2-bis (3-chloro-4-hydroxyphenyl) propane, bis (3, 5-dimethyl-4-hydroxyphenyl) methane, 2-bis- (3, 5-dimethyl-4-hydroxyphenyl) propane, bis (3, 5-dimethyl-4-hydroxyphenyl) sulfone, 2, 4-bis (3, 5-dimethyl-4-hydroxyphenyl) -2-methylbutane, 1-bis (3, 5-dimethyl-4-hydroxyphenyl) -p-diisophenylbenzene, 2-bis (3, 5-dichloro-4-hydroxyphenyl) propane, 2-bis (3, 5-dibromo-4-hydroxyphenyl) propane, 1-bis (4-hydroxyphenyl) -3, 3, 5-trimethylcyclohexane and 4, 4' - (m-phenylenediisopropylidene) -biphenyl.

Particularly preferred diphenols are 2, 2-bis (4-hydroxyphenyl) propane (BPA), 2-bis (3, 5-dimethyl-4-hydroxyphenyl) propane, 2-bis (3, 5-dichloro-4-hydroxyphenyl) propane, 2-bis (3, 5-dibromo-4-hydroxyphenyl) propane, 4' - (m-phenylenediisopropylidene) bisphenol (CAS-No 13595-25-0) (BPM), 1-bis (4-hydroxyphenyl) cyclohexane and 1, 1-bis (4-hydroxyphenyl) -3, 3, 5-Trimethylcyclohexane (TMC).

These and other suitable diphenols are described, for example: US 3028635, 2999835, 3148172, 2991273, 3271367, 4982014 and 2999846, DE-A1570703, 2063050, 2036052, 2211956 and 3832396, French patent 15611518, and monograph H.Schnell, Chemistry and Physics of Polycarbonates (Chemistry and Physics of Polycarbonates), Interscience Publishers, New York 1964, as well as JP-A62039/1986, 62040/1986 and 105550/1986.

In the case of homopolycarbonates only one diphenol is used, in the case of copolycarbonates a plurality of diphenols is used.

Preference is given to using polymer mixtures which comprise at least one polycarbonate having diol units composed of BPA and/or Trimethylcyclohexylbisphenol (TMC), preferably selected from the group consisting of homopolymers of BPA, copolymers of BPA and TMC or copolymers having from 5 to 60% by weight of TMC.

Suitable carbonic acid derivatives include, for example, phosgene or diphenyl carbonate.

Suitable chain terminators include monophenols as well as monocarboxylic acids.

Suitable monophenols include phenol itself, alkylphenols such as p-cresol, p-tert-butylphenol, p-n-octylphenol, p-isooctylphenol, p-n-and p-isononylphenol, p-cumylphenol, halophenols such as p-chlorophenol, 2, 4-dichlorophenol, p-bromophenol amylphenol, and 2, 4, 6-tribromophenol, and mixtures thereof.

Preferred chain terminators are phenols of the formula (I)

Wherein

R represents hydrogen, tert-butyl or C, branched or unbranched₈And/or C₉An alkyl group. However, p-cumylphenol may also be preferably used. During the transesterification, chain terminators result from the diaryl carbonate used.

The amount of chain terminators to be used is preferably 0.1 mol% to 5 mol%, based on the moles of the particular diphenols used in the phase boundary process. The chain terminators may be added before, during or after the phosgenation.

Suitable branching agents are the trifunctional or more than trifunctional compounds known from polycarbonate chemistry, in particular those having three or more than three phenolic hydroxyl groups.

Suitable branching agents include, for example, phloroglucinol, 4, 6-dimethyl-2, 4, 6-tris (4-hydroxyphenyl) -heptene-2, 4, 6-dimethyl-2, 4, 6-tris (4-hydroxyphenyl) -heptane, 1, 3, 5-tris (4-hydroxyphenyl) benzene, 1, 1, 1-tris- (4-hydroxyphenyl) -ethane, tris (4-hydroxyphenyl) phenylmethane, 2-bis [4, 4-bis (4-hydroxyphenyl) cyclohexyl ] propane, 2, 4-bis- (4-hydroxyphenyl-isopropyl) phenol, 2, 6-bis (2-hydroxy-5' -methyl-benzyl) -4-methylphenol, 2- (4-hydroxyphenyl) -2- (2, 4-dihydroxyphenyl) propane, hexa (4- (4-hydroxyphenyl-isopropyl) -phenyl-) ortho-phthalate, tetra (4-hydroxyphenyl) methane, tetra (4- (4-hydroxyphenyl-isopropyl) -phenoxy) methane and 1, 4-bis (4 ', 4' -dihydroxytriphenyl) -methyl) benzene as well as 2, 4-dihydroxybenzoic acid, 1, 3, 5-trimellitic acid, cyanuric chloride and, for some applications, even preferably 3, 3-bis (3-methyl-4-hydroxy-phenyl) -2-oxo-2, 3-dihydroindole.

The amount of branching agent to be used is optionally 0.01 mol% to 2 mol%, based on the moles of bisphenol employed.

The branching agents may be present together with the diphenols and the chain terminators in the aqueous alkaline phase of the phase interface process or may be added and dissolved in an organic solvent. In the transesterification process, branching agents may be used together with the diphenols.

The person skilled in the art is familiar with all these methods for preparing thermoplastic polycarbonates.

The compounds used as mold release agents are preferably esters of polyhydric alcohols with long-chain carboxylic acids. Preference is given to mold release agents which are not completely esterified and therefore have free OH groups. Particularly preferred are (partial) esters of saturated monovalent fatty acids having 16 to 22 carbon atoms with glycerol, trimethylolpropane, pentaerythritol or similar polyols. In particular glycerol monostearate and glycerol monopalmitate.

These saturated monobasic fatty acid esters of glycerol can be used alone or in a mixture with two or more components. Saturated monoesters of glycerol are generally prepared by transesterification of hydrogenated animal or vegetable oils with glycerol. Although the reaction product may also contain esters other than glycerides, it is used as a mold release agent according to the invention. For example, the mixture may contain more or less proportions of diglycerides and triglycerides.

The optimum amount of mold release agent in the production of CDs and other optical storage media (DVDs etc.) is determined on the one hand by a sufficient mold release effect and on the other hand by the formation of a coating in the mold. The amount of the release agent used is usually 50 to 1,000ppm, more preferably 100 to 500 ppm. For other uses of the polycarbonate, the amount is 100 to 10,000ppm, preferably 2,000 to 7,000 ppm.

The special phosphites according to the invention are those having both aromatic and aliphatic radicals in the molecule. These are compounds having the following structure:

wherein:

n represents a number of 0 to 5, preferably 1 to 3, particularly preferably 3,

y, in each case independently of one another, is alkyl or optionally substituted aryl, preferably C₁～C₄Alkyl radicals, particularly preferably methyl, sec-butyl and tert-butyl,

m represents a number from 1 to 3, preferably 3 and

x, in each case independently of one another, are optionally substituted methylene groups, wherein at least one methylene group must be completely substituted and the substituents are independently of one another selected from C₁～C₂₀Alkyl, preferably C₁～C₂₀Alkyl or two substituents on a fully substituted methylene group together represent the group:

wherein

R¹Represents C₁～C₁₈Alkyl radical, C₃～C₁₂Cycloalkyl radical, C₆～C₃₀Alkylaryl and aryl, wherein these radicals may in turn be substituted by 1 to 4O-alkylene-O and/or carboxylate-COO-groups; c containing 2 to 10 hydroxyl groups₂～C₁₈PolyhydroxyAn alkyl group; c containing 2-10 phenolic hydroxyl groups₂～C₁₈A polyphenyl group.

Preferred compounds are of the formula:

wherein

R₂Represents C₁～C₆An alkyl group;

R₃represents methyl or ethyl and

R₄is selected from C₁～C₁₈Alkyl radical, C₃～C₁₂Cycloalkyl radical, C₆～C₃₀Alkylaryl and aryl, wherein these radicals may in turn be substituted by 1 to 4O-alkylene-O and/or carboxylate-COO-groups; c containing 2-10 hydroxy groups₂～C₁₈A polyhydroxyalkyl group; c containing 2-10 phenolic OH groups₂～C₁₈A polyphenyl group.

Also preferred are compounds of the formula

Wherein

Y and n have the abovementioned meanings and

R₅independently of one another, from hydrogen and C₃～C₂₀Alkyl, preferably at least one R₅Represents alkyl, R₆Independently of one another, represents C₁～C₁₀An alkyl group.

The compounds of the general formula are particularly preferred.

Wherein R is₁And R₂Represents methyl, sec-butyl or tert-butyl.

Similarly, the compounds defined on pages 16 to 20 of EP A10038876 and the examples on page 21 of the same document are also particularly preferred.

(2, 4, 6-tri-tert-butylphenyl) - (2-butyl-2-ethyl-propane-1, 3-diyl) phosphite having the following structure is quite particularly preferred.

Phosphites may be used alone, but may also be used in combination with other phosphorus compounds, wherein the other phosphorus compounds may also be compounds having different phosphorus oxidation numbers. Combinations such as phosphites according to the invention with other phosphites, with phosphines, such as triphenylphosphine, with phosphonites, with phosphates, with phosphonates and the like can therefore be used.

The phosphites used according to the invention can be prepared in a generally known or similarly known manner. (2, 4, 6-tri-tert-butylphenyl) - (2-butyl-2-ethyl-propane-1, 3-diyl) phosphite is described, for example, in EP-A702018 and EP 635514.

The polymer mixture according to the invention contains phosphorus compounds in a proportion of 10 to 5,000ppm, preferably 10 to 1,000ppm, particularly preferably 20 to 500ppm, very particularly preferably 50 to 250 ppm.

Preferred, particularly preferred or more particularly preferred compounds containing said substituents are preferred, particularly preferred or more particularly preferred.

However, the definitions or explanations and parameters of the radicals mentioned above in general or in the preferred ranges and the ratios of the amounts used can also be combined with one another, i.e. within the respective ranges and preferred ranges.

The addition of the mold release agent and the phosphorus compound to the thermoplastic polymer mixture can be carried out after the preparation of the polycarbonate and during the processing of the polycarbonate, for example by addition to a polycarbonate polymer solution or to a melt of the thermoplastic polymer mixture. In addition, it is also possible to add the components independently of one another in the individual operating steps, for example, one component during the processing of the polymer solution and the other component in the melt, provided that all components are included during the production of the end product (molded article).

The thermoplastic polymer mixtures according to the invention may also contain conventional additives suitable for polycarbonates in known amounts, such as, for example and preferably, UV radiation stabilizers, flame retardants, dyes, fillers, blowing agents, optical brighteners and antistatics. For optical applications, it is preferred to use ingredients that do not adversely affect the transparency of the material.

These substances can be found in a number of publications, for example in the Additive for plastics Handbook, John Mudphy, 1999, and are commercially available.

1. Suitable antioxidants include, for example:

alkylated monophenols, for example 2, 6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4, 6-dimethylphenol, 2, 6-di-tert-butyl-4-ethylphenol, 2, 6-di-tert-butyl-4-n-butylphenol, 2, 6-di-tert-butyl-4-isobutylphenol, 2, 6-dicyclopentyl-4-methylphenol, 2- (. alpha. -methylcyclohexyl) -4, 6-dimethylphenol, 2, 6-dioctadecyl-4-methylphenol, 2, 4, 6-tricyclohexylphenol, 2, 6-di-tert-butyl-4-methoxymethylphenol, nonylphenols, the side chains of which are linear or branched, for example 2, 6-dinonyl-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.

Alkylthiomethylphenols, for example 2, 4-dioctylthiomethyl-6-tert-butylphenol, 2, 4-dioctylthiomethyl-6-methylphenol, 2, 4-dioctylthiomethyl-6-ethylphenol, 2, 6-di-dodecylthiomethyl-4-nonylphenol.

Hydroquinones and alkylated hydroquinones, for example 2, 6-di-tert-butyl-4-methoxyphenol, 2, 5-di-tert-butylhydroquinone, 2, 5-di-tert-amylhydroquinone, 2, 6-diphenyl-4-octadecyloxyphenol, 2, 6-di-tert-butylhydroquinone, 2, 5-di-tert-butyl-4-hydroxyanisole, 3, 5-di-tert-butyl-4-hydroxyphenyl stearate, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) adipate.

Tocopherols, such as alpha-tocopherol, beta-tocopherol, gamma-tocopherol, delta-tocopherol and mixtures thereof (vitamin E).

Hydroxylated thiodiphenyl ethers, for example 2, 2 '-thiobis (6-tert-butyl-4-methylphenol), 2' -thiobis (4-octylphenol), 4 '-thiobis (6-tert-butyl-3-methylphenol), 4' -thiobis (6-tert-butyl-2-methylphenol), 4 '-thiobis (3, 6-di-sec-amylphenol), 4' -bis (2, 6-dimethyl-4-hydroxyphenyl) disulfide.

Alkylidenebisphenols, for example 2, 2 ' -methylenebis (6-tert-butyl-4-methylphenol), 2 ' -methylenebis (6-tert-butyl-4-ethylphenol), 2 ' -methylenebis [ 4-methyl-6- (. alpha. -methylcyclohexyl) phenol ], 2 ' -methylenebis [ 4-methyl-6-cyclohexylphenol ], 2 ' -methylenebis (6-nonyl-4-methylphenol), 2 ' -methylenebis (4, 6-di-tert-butylphenol), 2 ' -ethylenebis (6-tert-butyl-4-isobutyl-phenol), 2, 2 '-methylenebis [6- (. alpha. -methylbenzyl) -4-nonylphenol ], 2' -methylenebis [6- (. alpha.,. alpha. -dimethylbenzyl) -4-nonylphenol ], 4 '-methylenebis (2, 6-di-tert-butylphenol), 4' -methylenebis (6-tert-butyl-2-methylphenol), 1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 2, 6-bis (3-tert-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol, 1, 3-tris (5-tert-butyl-4-, 1, 1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) -3-n-dodecylmercaptobutane, ethyleneglycol bis [3, 3-bis (3 ' -tert-butyl-4 ' -hydroxyphenyl) butyrate ], bis (3-tert-butyl-4-hydroxy-5-methylphenyl) dicyclopentadiene, bis [2- (3 ' -tert-butyl-2 ' -hydroxy-5 ' -methylbenzyl) -6-tert-butyl-4-methylphenyl ] terephthalate, 1-bis (3, 5-dimethyl-2-hydroxyphenyl) butane, 2-bis (3, 5-di-tert-butyl-4-hydroxyphenyl) propane, and mixtures thereof, 2, 2-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) -4-n-dodecylmercaptobutane, 1, 5, 5-tetrakis (5-tert-butyl-4-hydroxy-2-methylphenyl) pentane.

70-, N-and S-benzyl compounds, for example 3, 5,3 ', 5 ' -tetra-tert-butyl-4, 4 ' -dihydroxydibenzyl ether, octadecyl-4-hydroxy-3, 5-dimethylbenzylmercaptoacetate, tridecyl-4-hydroxy-3, 5-di-tert-butylbenzylmercaptoacetate, tris (3, 5-di-tert-butyl-4-hydroxybenzyl) amine, bis (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) dithioterephthalate, bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, isooctyl-3, 5-di-tert-butyl-4-hydroxybenzylmercaptoacetate.

Hydroxybenzylated malonates, for example dioctadecyl-2, 2-bis (3, 5-di-tert-butyl-2-hydroxybenzyl) malonate, dioctadecyl-2- (3-tert-butyl-4-hydroxy-5-methylbenzyl) malonate, didodecylmercaptoethyl-2, 2-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) malonate-, bis [4- (1, 1, 3, 3-tetramethylbutyl) phenyl ] -2, 2-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) malonate.

Aromatic hydroxybenzyl compounds, for example 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) -2, 4, 6-trimethylbenzene, 1, 4-bis (3, 5-di-tert-butyl-4-hydroxybenzyl) -2, 3, 5, 6-tetramethylbenzene, 2, 4, 6-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) phenol.

Triazine Compounds, for example 2, 4-bis (octylmercapto) -6- (3, 5-di-tert-butyl-4-hydroxyanilino) -1, 3, 5-triazine, 2-octylmercapto-4, 6-bis (3, 5-di-tert-butyl-4-hydroxyphenoxy) -1, 3, 5-triazine, 2, 4, 6-tris (3, 5-di-tert-butyl-4-hydroxyphenoxy) -1, 2, 3-triazine, 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, 1, 3, 5-tris (4-tert-butyl-3-hydroxy-2, 6-dimethylbenzyl) isocyanurate, 2, 4, 6-tris (3, 5-di-tert-butyl-4-hydroxyphenylethyl) -1, 3, 5-triazine, 1, 3, 5-tris (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hexahydro-1, 3, 5-triazine, 1, 3, 5-tris (3, 5-dicyclohexyl-4-hydroxybenzyl) isocyanurate.

Acylaminophenols, for example 4-hydroxylauranilide, 4-hydroxystearanilide octyl-N- (3, 5-di-tert-butyl-4-hydroxyphenyl) carbamate.

Esters of beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid with mono-or polyhydric alcohols, e.g. with methanol, ethanol, N-octanol, isooctanol, 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' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2, 6, 7-trioxabicyclo [ 2.2.2.2 ] trioxabicyclo]Octane, ester with stearyl alcohol (IRGANOX 1076)^*Manufactured by Ciba Spec) is more particularly suitable and preferred.

Esters of beta- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid with mono-or polyhydric alcohols, for example with methanol, ethanol, N-octanol, isooctanol, 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' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2, 6, 7-trioxabicyclo [2, 2, 2] octane.

Esters of beta- (3, 5-dicyclohexyl-4-hydroxyphenyl) propionic acid with mono-or 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' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2, 6, 7-trioxabicyclo [2.2.2 ] octane.

Esters of 153, 5-di-tert-butyl-4-hydroxyphenyl acetic acid with mono-or polyhydric alcohols, for example 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' -bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2, 6, 7-trioxabicyclo [2.2.2 ] octane.

Amides of beta (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid, for example N, N '-bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hexamethylenediamide, N' -bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) trimethylenediamine, N '-bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hydrazine, N' -bis [2- (3- [3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hydrazine]Propionyloxy) ethyl]Oxamide (Naugard)^*XL-1 from Uniroyal).

1.17 ascorbic acid (vitamin C)

1.18 antioxidants for amines, for example N, N ' -diisopropyl-p-phenylenediamine, N ' -di-sec-butyl-p-phenylenediamine, N ' -bis (1, 4-dimethylpentyl) -p-phenylenediamine, N ' -bis (1-ethyl-3-methylpentyl) -p-phenylenediamine, N ' -bis (1-methyl-heptyl) -p-phenylenediamine, N ' -dicyclohexyl-p-phenylenediamine, N ' -diphenyl-p-phenylenediamine, N ' -bis (2-naphthyl) -p-phenylenediamine, N-isopropyl-N ' -phenyl-p-phenylenediamine, N- (1, 3-dimethylbutyl) -N ' -phenyl-p-phenylenediamine, N- (1-methyl-heptyl) -N ' -phenyl-p-phenylenediamine, N ' -tert-butyl-p-phenylenediamine, N ' -di-tert-phenylenediamine, N ' -di-butyl-p-phenylenediamine, N ' -, N-cyclohexyl-N '-phenyl-p-phenylenediamine, 4- (p-toluenesulfonamide) diphenylamine, N' -dimethyl-N, N '-di-sec-butyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4-isopropoxy-diphenylamine, N-phenyl-1-naphthylamine, N- (4-tert-octylphenyl) -1-naphthylamine, N-phenyl-2-naphthylamine, octylated diphenylamines such as p, p' -di-tert-octyldiphenylamine, 4-N-butyl-aminophenol, 4-butyrylaminophenol, 4-nonanoylaminophenol, 4-dodecanoylaminophenol, 4-octadecanoylaminophenol, p- (4-methoxyphenyl) amine, p-toluenesulfonamide, N-tert-octyldiphenylamine, N-octyldiphenylamine, 4-butylaminophenol, 4-butyrylaminophenol, 4-nonan, 2, 6-di-tert-butyl-4-dimethylaminomethylphenol, 2, 4 ' -diaminodiphenylmethane, 4 ' -diaminodiphenylmethane, N, N, N ', N ' -tetramethyl-4, 4 ' -diaminodiphenylmethane, 1, 2-bis [ (2-methylphenyl) amino ] ethane, 1, 2-bis (phenyl-amino) propane, (o-tolyl) biguanide, bis [4- (1 ', 3 ' -dimethylbutyl) phenyl ] amine, tert-octylated N-phenyl-1-naphthylamine, a mixture of mono-and dialkylated tert-butyl/tert-octyldiphenylamines, a mixture of mono-and dialkylated nonyldiphenylamines, a mixture of mono-and dialkylated dodecyldiphenylamines, a mixture of mono-and dialkylated isopropyl/isohexyldiphenylamines, A mixture of mono-and dialkylated tert-butyldiphenylamines, 2, 3-dihydro-3, 3-dimethyl-4H-1, 4-benzothiazine, phenazine, a mixture of mono-and dialkylated tert-butyl/tert-octylphenothiazines, tert-octylphenothiazine, a mixture of mono-and dialkylated tert-octylphenothiazines, N-allylphenothiazine, N, N, N ', N' -tetraphenyl-1, 4-diaminobut-2-ene, N, N-bis (2, 2,6, 6-tetramethylpiperidin-4-yl) hexamethylenediamine, bis (2, 2,6, 6-tetramethylpiperidin-4-yl) sebacate, 2,6, 6-tetramethylpiperidin-4-one, 2,6, 6-tetramethylpiperidin-4-ol. Single compounds or mixtures thereof may be used.

1.19 suitable thiosynergists include, for example, lauryl thiodipropionate, distearyl thiodipropionate.

2. The UV absorbers and light stabilizers may be present in amounts of 0.1 to 15 wt.%, preferably 3 to 8 wt.%. Are used in the compositions according to the invention, based on the weight of the composition. Suitable UV absorbers and light stabilizers are, for example:

2.12- (2' -hydroxyphenyl) benzotriazoles, for example: 2- (2' -hydroxy-5)' -methylphenyl) benzotriazole, 2- (3 ', 5 ' -di-tert-butyl-2 ' -hydroxyphenyl) benzotriazole, 2- (5 ' -tert-butyl-2 ' -hydroxyphenyl) benzotriazole, 2- (2 ' -hydroxy-5 ' - (1, 1, 3, 3-tetramethyl-butyl) phenyl) benzotriazole, 2- (3 ', 5 ' -di-tert-butyl-2 ' -hydroxyphenyl) -5-chlorobenzotriazole, 2- (3 ' -tert-butyl-2 ' -hydroxy-5 ' -methylphenyl) -5-chlorobenzotriazole, 2- (3 ' -sec-butyl-5 ' -tert-butyl-2 ' -hydroxyphenyl) benzotriazole, 2- (5 ' -tert-butyl-2 ' -hydroxy-phenyl) benzotriazole, and mixtures thereof, 2- (2 ' -hydroxy-4 ' -octyloxy-phenyl) benzotriazole, 2- (3 ', 5 ' -di-tert-amyl-2 ' -hydroxyphenyl) benzotriazole, 2- (3 ', 5 ' -bis (. alpha.,. alpha. -dimethylbenzyl) -2 ' -hydroxyphenyl) benzotriazole, 2- (3 ' -tert-butyl-2 ' -hydroxy-5 ' - (2-octyloxycarbonyl-ethyl) phenyl) -5-chlorobenzotriazole, 2- (3 ' - (tert-butyl) -5 ' - [2- (2-ethyl-hexyloxy) carbonylethyl]-2 ' -hydroxyphenyl) -5-chlorobenzotriazole, 2- (3 ' -tert-butyl-2 ' -hydroxy-5 ' - (2-methoxycarbonylethyl) phenyl) benzotriazole, 2- (3 ' -tert-butyl-2 ' -hydroxy-5 ' - (2-octyloxycarbonylethyl) phenyl) benzotriazole, 2- (3 ' -tert-butyl-5 ' - [2- (2-ethylhexyloxy) carbonylethyl]-2 '-hydroxyphenyl) benzotriazole, 2- (3' -dodecyl-2 '-hydroxy-5' -methylphenyl) benzotriazole, 2- (3 '-tert-butyl-2' -hydroxy-5 '- (2-isooctyloxycarbonylethyl) phenylbenzotriazole, 2' -methylenebis [4- (1, 1, 3, 3-tetramethylbutyl) -6-benzotriazol-2-ylphenol](ii) a 2- [3 ' -tert-butyl-5 ' - (2-methoxycarbonylethyl) -2 ' -hydroxyphenyl]-2H-benzotriazole with polyethylene glycol 300, [ R-CH₂CH₂-COO-CH₂CH₂]₂Wherein R is 3 ' -tert-butyl-4 ' -hydroxy-5 ' -2H-benzotriazol-2-ylphenyl, 2- [2 ' -hydroxy-3 ' - [ α, α -dimethylbenzyl)]-5' - (1, 1, 3, 3-tetramethylbutyl) phenyl]Benzotriazole, 2- [2 ' -hydroxy-3 ' - (1, 1, 3, 3-tetramethylbutyl) -5 ' - (alpha, alpha-dimethylbenzyl) phenyl]Benzotriazole.

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

Esters of substituted and unsubstituted benzoic acids, for example 4-tert-butylphenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis (4-tert-butylbenzoyl) resorcinol, benzoyl resorcinol, 2, 4-di-tert-butylphenyl 3, 5-di-tert-butyl-4-hydroxybenzoate, hexadecyl 3, 5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3, 5-di-tert-butyl-4-hydroxybenzoate, 2-methyl-4, 6-di-tert-butylphenyl 3, 5-di-tert-butyl-4-hydroxybenzoate.

Acrylates, for example ethyl- α -cyano- β, β -diphenylacrylate, isooctyl- α -cyano- β, β -diphenylacrylate, methyl- α -methoxycarbonylcinnamate, methyl- α -cyano- β -methyl-p-methoxycinnamate, butyl- α -cyano- β -methyl-p-methoxycinnamate and methyl- α -methoxycarbonyl-p-methoxycinnamate N (β -methoxycarbonyl- β -cyanovinyl) -2-methyldihydroindole.

Nickel compounds, for example nickel complexes of 2, 2' -thiobis [4- (1, 1, 3, 3-tetramethylbutyl) phenol ], such as the 1: 1 or 1: 2 complex, with or without additional ligands, for example N-butylamine, triethanolamine or N-cyclohexyldiethanolamine, nickel dibutyldithiocarbamate, nickel salts of monoalkyl esters, e.g.the methyl or ethyl ester of 4-hydroxy-3, 5-di-tert-butylbenzylphosphonic acid, nickel complexes of ketoximes, e.g.of 2-hydroxy-4-methylphenylundecylketoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxypyrazole, with or without additional ligands.

Sterically hindered amines, for example 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-tert-butyl-4-hydroxybenzylmalonate, condensate of 1- (2-hydroxyethyl) -2, 2,6, 6-tetramethyl-4-hydroxypiperidine and succinic acid, Linear or cyclic condensates of N, N '-bis (2, 2,6, 6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-tert-octylamino-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-butanetetracarboxylate, 1' - (1, 2-ethylene) bis (3, 3, 5, 5-tetramethylpiperazinone), 4-benzoyl-2, 2,6, 6-tetramethylpiperidine, 4-octadecyloxy-2, 2,6, 6-tetramethylpiperidine, bis (1, 2, 2,6, 6-pentamethylpiperidyl) -2-N-butyl-2- (2-hydroxy-3, 5-di-tert-butylbenzyl) malonate, 3-N-octyl-7, 7, 9, 9-tetramethyl-1, 3, 8-triazaspiro [4, 5] decane-2, 4-dione, bis (1-octyloxy-2, 2,6, 6-tetramethyl-piperidyl) sebacate, bis (1-octyloxy-2, 2,6, 6-tetramethyl-piperidyl) succinate, N' -bis (2, 2,6, 6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-morpholinyl-2, 6-dichloro-1, 3, linear or cyclic condensates of 5-triazine, condensates of 2-chloro-4, 6-bis (4-n-butylamino-2, 2,6, 6-tetramethylpiperidinyl) -1, 3, 5-triazine and 1, 2-bis (3-aminopropyl-amino) ethane, condensates of 2-chloro-4, 6-bis (4-n-butylamino-1, 2, 2,6, 6-pentamethylpiperidinyl) -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) pyrrolidine-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-octadecyloxy-2, 2,6, 6-tetramethylpiperidine, a condensation product of N, N' -bis- (2, 2,6, 6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-cyclohexylamino-2, 6-dichloro-1, 3, 5-triazine, 1, 2-bis (3-aminopropylamino) ethane and 2, 4, 6-trichloro-1, the condensation product of 3, 5-triazine and 4-butylamino-2, 2,6, 6-tetramethylpiperidine (CAS reg.no. [136504-96-6 ]); n- (2, 2,6, 6-tetramethyl-4-piperidyl) -7-dodecyl-succinimide, N- (1, 2, 2,6, 6-pentamethyl-4-piperidyl) -N-dodecyl-succinimide, 2-undecyl-7, 7, 9, 9-tetramethyl-1-oxa-3, 8-diaza-4-oxospiro [4, 5] -decane, a reaction product of 7, 7, 9, 9-tetramethyl-2-cycloundecyl-1-oxa-3, 8-diaza-4-oxospiro [4, 5] decane and epichlorohydrin, 1-bis (1, 2, 2,6, 6-pentamethyl-4-piperidinyloxycarbonyl) -2- (4-methoxyphenyl-oxycarbonyl) ) Reaction products of ethylene, N '-bis (formyl) -N, N' -bis (2, 2,6, 6-tetramethyl-4-piperidyl) -hexamethylenediamine, diesters of 4-methoxymethylenemalonic acid with 1,2, 2,6, 6-pentamethyl-4-hydroxypiperidine, poly [ methylpropyl-3-oxo-4- (2, 2,6, 6-tetramethyl-4-piperidyl) ] siloxane, malonic anhydride- α -olefin copolymers with 2, 2,6, 6-tetramethyl-4-aminopiperidine or 1,2, 2,6, 6-pentamethyl-4-aminopiperidine.

Oxamides, for example 4, 4 ' -dioctyloxyoxanilide, 2 ' -diethoxyoxanilide, 2 ' -dioctyloxy-5, 5 ' -di-tert-butyloxanilide, 2 ' -didodecyloxy-5, 5 ' -di-tert-butyloxanilide, 2-ethoxy-2 ' -ethyloxanilide, N ' -bis (3-dimethylaminopropyl) oxamide, 2-ethoxy-5-tert-butyl-2 ' -ethyloxanilide and its reaction with 2-ethoxy-2 ' -ethyl-5, 4 ' -di-tert-N, mixtures of oxanilides, mixtures of o-and p-methoxy-disubstituted oxanilides and mixtures of o-and p-ethoxy-disubstituted oxanilides.

82- (2-hydroxyphenyl) -1, 3, 5-triazines, 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- (2-hydroxy-4-dodecyloxyphenyl) -4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine, 2- (2-hydroxy-4-tridecyloxyphenyl) -4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine, 2- [ 2-hydroxy-4- (2-hydroxy-3-butoxypropoxy) phenyl ] -4, 6-bis (2, 4-dimethyl) -1, 3, 5-triazine, 2- [ 2-hydroxy-4- (2-hydroxy-3-octyloxypropoxy) phenyl ] -4, 6-bis (2, 4-dimethyl) -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-dodecyloxypropoxy) phenyl ] -4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine, 2- (2-hydroxy-4-hexyloxy) phenyl-4, 6-diphenyl) -1, 3, 5-triazine, 2- (2-hydroxy-4-methoxy-phenyl) phenyl-4, 6-diphenyl) -1, 3, 5-triazine, 2, 4, 6-tris [ 2-hydroxy-4- (3-butoxy-2-hydroxy-propoxy) phenyl ] -1, 3, 5-triazine, 2- (2-hydroxyphenyl) -4- (4-methoxyphenyl) -6-phenyl-1, 3, 5-triazine, 2- { 2-hydroxy-4- [3- (2-ethylhexyl-1-oxo) -2-hydroxypropoxy ] phenyl } -4, 6-bis (2, 4-dimethylphenyl) -1, 3, 5-triazine.

Either single compounds or mixtures thereof may be used.

3. Suitable metal deactivators are, for example, N, N ' -diphenyloxamide, N-salicylal-N ' -salicyloyl hydrazine, N, N ' -bis (salicyloyl) hydrazine, N, N ' -bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) hydrazine, 3-salicyloylamino-1, 2, 4-triazole, bis (benzylidene) oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N, N ' -diacetyladipoyl dihydrazide, N, N ' -bis (salicyloyl) oxalyl dihydrazide, N, N ' -bis (salicyloyl) thiomalonyl dihydrazide. Single compounds or mixtures thereof may be used.

4. Suitable peroxide trapping agents include, for example: esters of beta-thiodipropionic acid, for example lauryl, stearyl, myristyl or tridecyl esters, zinc mercaptobenzimidazole or 2-mercaptobenzimidazole, zinc dibutyldithiocarbamate, dioctadecyl disulfide, pentaerythritol tetradodecylmercapto propionate. Single compounds or mixtures thereof may be used.

5. Suitable basic costabilizers are, for example: melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts, alkaline earth metal salts of higher fatty acids, such as calcium stearate, zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate and potassium palmitate, antimony pyrocatecholate or zinc pyrocatecholate. Single compounds thereof or mixtures thereof may be used.

6. Suitable nucleating agents include, for example, inorganic substances such as talc, metal oxides such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates, preferably alkaline earth metal salts thereof; organic compounds such as monocarboxylic or polycarboxylic acids and their salts, for example 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymers such as ionic copolymers (ionomers). 1,3: 2, 4-bis (3 ', 4' -dimethylbenzylidene) sorbitol, 1, 3: 2, 4-bis (p-methyldibenzylidene) sorbitol and 1, 3: 2, 4-bis (benzylidene) sorbitol is particularly preferred. A single compound thereof or a mixture thereof may be used.

7. Suitable fillers and reinforcing agents include, for example, calcium carbonate, silicates, glass fibers, glass beads, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite, wollastonite, sawdust and chips or fibers of other natural products, synthetic fibers. Single compounds or mixtures thereof may be used.

8. Suitable other additives include, for example, plasticizers, lubricants, emulsifiers, pigments, viscosity modifiers, catalysts, flow control agents, optical brighteners, flame retardants, antistatic agents, and blowing agents.

9. Suitable benzofuranones and indolinones include, for example, those described in U.S.4,325,863; U.S.4,338,244; U.S.5,175,312; U.S.5,216,052; U.S.5,252,643; DE-A-4316611; DE-A-4316622; DE-A-4316876; EP-A-0589839 or EP-A-0591102, or 3- [4- (2-acetoxyethoxy) phenyl ] -5, 7-di-tert-butyl-benzofuran-2-one, 5, 7-di-tert-butyl-3- [4- (2-stearoyloxyethoxy) phenyl ] benzofuran-2-one, 3' -bis [5, 7-di-tert-butyl-3- (4- [ 2-hydroxyethoxy ] phenyl) benzofuran-2-one ], 5, 7-di-tert-butyl-3- [ 4-ethoxyphenyl ] benzofuran-2-one, 3- (4-ethoxy-3, 5-dimethylphenyl) -5, 7-di-tert-butylbenzofuran-2-one, 3- (3, 5-dimethyl-4-pivaloyloxyphenyl) -5, 7-di-tert-butylbenzofuran-2-one, 3- (3, 4-dimethylphenyl) -5, 7-di-tert-butylbenzofuran-2-one, 3- (2, 3-dimethylphenyl) -5, 7-di-tert-butylbenzofuran-2-one, lactone antioxidants such as

These compounds act as antioxidants, for example. Single compounds thereof or mixtures thereof may be used.

10. Suitable fluorescent plasticizers are listed under "Plastics Additives Handbook", edited by R.G Gratzer and H.M muller, Hanser Verlag, third edition, 1990, P775-789.

11. Suitable flame retardant additives include phosphate esters, i.e., triphenyl phosphate, resorcinol diphosphate, bromine-containing compounds such as brominated phosphate esters, brominated oligocarbonates, and polycarbonates, and salts such as C₄F₉SO₃ ^-Na⁺。

12. Suitable toughening agents include butadiene rubbers with grafted styrene/acrylonitrile or methyl methacrylate, ethylene/propylene rubbers with grafted maleic anhydride, ethyl and butyl acrylate rubbers with grafted methyl methacrylate or styrene/acrylonitrile, interpenetrating siloxane and acrylate networks with grafted methyl methacrylate or styrene/acrylonitrile.

13. Suitable polymers include SAN, ABS, PMMA, PTFE, PSU, PPS, polyolefins such as polyethylene, polypropylene and ethylene/propylene rubbers, epoxies, polyesters such as PBT, PET, PCT, PCTG and PETG and other polycarbonates produced by the interfacial process.

14. Suitable antistatic agents include sulfonates, e.g., C₁₂H₂₅SO^3-Or C₈F₁₇SO^3-Tetraethylammonium salt of (a).

15. Suitable colorants include pigments as well as organic and inorganic dyes.

16. Epoxy group-containing compounds, for example, 3, 4-epoxycyclohexylmethyl-3, 4-epoxycyclohexylcarboxylate, copolymers of glycidyl methacrylate and epoxysilanes.

17. Compounds containing anhydride groups, for example, maleic anhydride, succinic anhydride, benzoic anhydride and phthalic anhydride.

18. Phosphites and phosphonites suitable as stabilizers include, for example, triphenyl phosphite, diphenylalkyl phosphite, phenyldialkyl phosphite, tris (nonylphenyl) phosphite, trilauryl phosphite, trioctadecyl phosphite, distearyl pentaerythritol diphosphite, tris (2, 4-di-tert-butylphenyl) phosphite, diisodecyl pentaerythritol diphosphite, bis (2, 4-di-tert-butylphenyl) pentaerythritol diphosphite, bis (2, 6-di-tert-butyl-4-methylphenyl) pentaerythritol diphosphite, diisodecyl oxypentaerythritol diphosphite, bis (2, 4-di-tert-butyl-6-methylphenyl) pentaerythritol diphosphite, bis (2, 4, 6-tri (tert-butylphenyl) pentaerythritol diphosphite, diphenyl alkyl phosphite, phenyl dialkyl phosphite, tris (nonylphenyl) phosphite, trilayer phosphite, diphenyl alkyl phosphite, tris (nonylphenyl), Tristearyl sorbitol triphosphite, tetrakis (2, 4-di-tert-butylphenyl) -4, 4' -diphenylene diphosphonite, 6-isooctyloxy-2, 4, 8, 10-tetra-tert-butyl-12H-dibenzo [ d, g ] -1, 3, 2-dioxaphospho sphorine, 6-fluoro-2, 4, 8, 10-tetra-tert-butyl-12-methyldibenzo [ d, g ] -1, 3, 2-dioxaphospho sphorine, bis (2, 4-di-tert-butyl-6-methylphenyl) methyl phosphite, bis (2, 4-di-tert-butyl-6-methylphenyl) ethyl phosphite, 6-fluoro-2, 4, 8, 10-tetra-tert-butyl-12-methyldibenzo [ d, g ] -1, 3, 2-dioxaphosphosine, 2 ', 2 "-nitrilo [ triethyltris (3, 3 ', 5, 5 ' -tetra-tert-butyl-1, 1 ' -diphenyl-2, 2 ' -diyl) phosphite ], 2-ethyl-hexyl (3, 3 ', 5, 5 ' -tetra-tert-butyl-1, 1 ' -diphenyl-2, 2 ' -diyl) phosphite, 5-butyl-5-ethyl-2- (2, 4, 6-tri-tert-butylbenzoyloxy) -1, 3, 2-dioxaphosphosine.

Tris (2, 4-di-tert-butylphenyl) phosphite (Irgafos)^*168, Ciba-Geigy) or triphenylphosphine are particularly preferred.

The compounds in classes 16 and 17 act as melt stabilizers. They may be used individually or in mixtures.

It will be apparent to those skilled in the art from the above additives that additives suitable for use in the fields of CDs, DVDs and other optical recording media without impairing the transparency thereof will be selected.

IRGANOX 1076^*See above, and benzotriazoles of class 2.1 (so-called nalfenes), especially in admixture with each other, are particularly suitable additives.

The polymer mixtures according to the invention are used to produce moldings, preferably optical media, in a manner known per se for polycarbonates. In particular for the manufacture of compact discs and DVDs and optical media that can be written and erased one or more times. The writable layer is composed in particular of a dye or a metal layer, the latter using the exchange from the amorphous state to the crystalline state as recording principle or having magnetic properties.

Such production of the optical media is preferably carried out from the polymer mixtures according to the invention which have been produced, for example in the form of particles. However, the production of the optical media can also be carried out by processing the components into pure or customary commercial polycarbonates and/or adding to the customary additives in the production of moldings from polycarbonates.

The invention furthermore relates to moldings obtainable therefrom, for example optical data carriers, preferably compact discs and DVDs, which are produced from the thermoplastic polymer mixtures according to the invention.

The thermoplastic polymer mixtures according to the invention have the advantage that they have better stability during the production of the mouldings and that the resulting end articles (mouldings) are easy to release from the production moulds and leave no impurities in the moulds.

The following examples serve to illustrate the invention. The invention is not limited to these examples.

Examples

Examples of polycarbonates prepared by the phase interface method

The following mixtures were prepared

X parts by weight of polycarbonate particles prepared by the phase interface process and having tert-butylphenol end groups, produced with BPA-PC and having an average solution viscosity of 1.195 (measured at 25 ℃ in methylene chloride, content 0.5g in 100ml of methylene chloride) are thoroughly mixed with y parts by weight of glycerol monostearate and Z parts by weight of phosphorus compound in a closed vessel in accordance with the table below. The mixture obtained is then compounded in a twin-screw kneader of the Werner Pfleiderer ZSK53 type at a bulk temperature of about 240 ℃.

TABLE 1 (Components)

	Polycarbonate resin	Glycerol monostearate	Phosphite esters 1	Phosphite 2
					Example 1	99.955	0.04	0.005
Example 2	99.95	0.04	0.01
					Comparative example 1	99.955	0.04		0.005
Comparative example 2	99.95	0.04		0.01
					Comparative example 3 (No stabilizer)	99.96	0.04	0	0

The product Loxiol EP 129 manufactured by Henke KgaA was used as glycerol monostearate. Phosphite 1 is (2, 4, 6-tri-tert-butylphenyl) - (2-butyl-2-ethylpropane-1, 3-diyl) phosphite under the trade name Ultranox 641^*From GE specialty Chemicals. Phosphite-2 is tris (2, 4-di-tert-butylphenyl) phosphite, Irgafos^*168 available from Ciba-Geigy.

To determine the product stability of the CD, CD blanks made of the above-mentioned materials were produced using a CD injection molding machine of the Netstal Discjet 600 type. The CD has a thickness of 1.2mm and an outer diameter of 120 mm. Product stability was checked by means of various machine conditions, hereinafter referred to as settings 1-4.

Setting 1:

barrel temperature (feed/compression/barrel head/nozzle): 315/320/320/320 ℃, maximum injection rate: 130mm/sec, die (pre-run temperature): 55 ℃, cycle time: 4.6sec

Setting 2:

barrel temperature (feed/compression/barrel head/nozzle): 315/340/350/350 ℃, maximum injection rate: 110mm/sec, die (pre-run temperature): 55 ℃, cycle time: 4.9sec

Setting 3:

barrel temperature (feed/compression/barrel head/nozzle): 315/360/380/380 ℃, maximum injection rate: 100mm/sec, mold (pre-run temperature): 55 ℃, cycle time: 5.5sec

Setting 4:

as set forth in setting 2, the cycle was interrupted with a 5 minute shut down. The fifth panel after the injection molding machine was restarted was measured as follows.

The remaining glycerol monostearate content and the phenolic OH group content of the CD blanks were then determined.

TABLE 2(GMS assay)

(GMS content in CD prepared under various conditions in ppm)

	Setting 1	Setting 2	Setting 3	Setting 4
					Example 1	305	285	280	255
Example 2	355	315	300	290
					Comparative example 1	290	270	255	195
Comparative example 2	320	290	265	210
					Comparative example 3 (No stabilizer)	285	255	205	140

In addition, the phenolic OH content in CD was also determined after preparation under various conditions.

TABLE 3 (phenols)OHBase measuring device

(the phenolic OH group content of CD prepared under various conditions is in ppm)

	Setting 1	Setting 2	Setting 3	Setting 4
					Example 1	120	130	130	140
Example 2	105	120	125	130
					Comparative example 1	120	135	135	150
Comparative example 2	120	135	140	150
					Comparative example 3	125	145	155	175

TABLE 4 (coating test)

	Coating formation
		Example 1	Light and slight
Example 2	Light and slight
		Comparative example 1	Light and slight
Comparative example 2	Medium and high grade
		Comparative example 3	Severe severity of disease

The formation of the coating was determined as follows: to determine the coating in the mold, one thousand partially filled CD blanks were produced in each case using a Netstal Discjet 600 CD injection molding machine with an Axicon CD mold. About 80% of the CD is partially filled due to the decrease of the metering flow path following adaptation to the after-pressure. The barrel temperature was 300 ℃ in the feed zone, 310 ℃ in the compression zone and 330 ℃ as is often the case in the barrel head and nozzle. The cycle time was about 5.5 seconds. After the first thousand injections, the surface of the die and the mirror surface in the outer zone, i.e. the zone not in contact with the polycarbonate melt, were visually examined to determine the formation of the coating. Thereby obtaining the above-mentioned results.

Examples of polycarbonates produced by the melt transesterification Process

According to the following table, x parts by weight of polycarbonate granules produced by the melt transesterification process, having phenolic end groups, produced with BPA-PC and having an average solution viscosity of 1,200 (measured at 25 ℃ in methylene chloride, content 0.5g in 100ml of methylene chloride) are mixed thoroughly with y parts by weight of glycerol monostearate and z parts by weight of phosphorus compound in a closed vessel. The mixture obtained is then compounded at a bulk temperature of about 240 ℃ in a twin-screw kneader of the Werner Pfleiderer ZSK53 type.

TABLE 1 (Components)

	Polycarbonate resin	Glycerol monostearate	Phosphite esters 1	Phosphite 2
					Example 1	99.06	0.03	0.01
Comparative example 1	99.06	0.03		0.01
					Comparative example 2 (without stabilizer)	99.07	0.03

The product Loxiol EP 129 manufactured by Henke KgaA was used as glycerol monostearate. Phosphite 1 is (2, 4, 6-tri-tert-butylphenyl) - (2-butyl-2-ethylpropane-1, 3-diyl) phosphite under the trade name Ultranox 641^*Phosphite-2 from GE specialty Chemicals is tris (2, 4-di-tert-butylphenyl) phosphite, as Irgafos^*168 available from Ciba-Geigy.

To determine the product stability of the CD, CD blanks made of the above-mentioned materials were produced using a CD injection molding machine of the Netstal Discjet 600 type. The CD has a thickness of 1.2mm and an outer diameter of 120 mm. Product stability was checked with the aid of the machine settings of the above-mentioned processing program.

The remaining glycerol monostearate content was measured on the CD blanks to give the following results.

TABLE 2(GMS assay)

(GMS content in CD prepared under various conditions in ppm)

	Setting 3
		Example 1	285
Comparative example 1	195
		Comparative example 2 (No Heat stabilizer)	180

TABLE 3 (coating test)

	Coating formation (%)
		Example 1	0.049
Comparative example 1	0.099
		Comparative example 2	0.160

Determination of the amount of condensate

The amount of condensate was determined as follows, and the aluminium foil with and without coating was weighed. The amount of coating is defined as follows:

amount of condensate,% (foil weight after measurement-foil weight before measurement)/sample weight × 100%

Detailed description of the method

20g of the dried granules (120 ℃ C., 4h) were poured into an aluminum pan having a diameter of 80mm and a depth of 15mm so that the pan bottom was uniformly covered with the granules. The pellet-loaded pan was placed in a sample chamber (85 mm diameter, 50mm deep) of an electrically heatable metal apparatus provided specifically for this purpose and closed with 0.03mm thick, 100mm diameter aluminum foil. In order to condense the volatile components on the aluminum foil, the aluminum foil was cooled with a cooling plate during the measurement. The cooling water temperature was adjusted to 20 ℃. In carrying out the measurement, it should be ensured that the aluminium foil seals the sample chamber well from the outside.

The metal apparatus was heated to 300 ℃ over a few minutes. The sample was held at this temperature for 4h, and then the test device was cooled to room temperature. After reaching room temperature, the aluminum foil was removed and weighed on a microbalance, and the amount of condensate was calculated as defined.

Detailed description of the assay

Glyceryl monostearate acid

The glycerol monostearate was separated by gas chromatography on a capillary column and detected by a flame ionization detector. Evaluated by internal standard method. The determination limit was about 10 ppm.

Phenolic OH group

The polycarbonate is dissolved in methylene chloride, titanium (IV) chloride is added to form an orange-red complex, and the extinction of the latter is determined photometrically at 546 mm. The calibration was done using BPA as an external standard. The limit of determination is about 20ppm OH.

Claims (7)

1. An optical data carrier comprising a thermoplastic molding composition containing at least one polycarbonate resin, at least one mold release agent and at least one phosphite having the structure,

wherein:

R₅independently of one another, from hydrogen and C₃～C₂₀An alkyl group, a carboxyl group,

R₆independently of one another represent C₁～C₁₀An alkyl group, a carboxyl group,

n represents 0 to 5, and

y independently of one another represents an alkyl or aryl group.

2. An optical data carrier according to claim 1, wherein the phosphite is a compound of the formula:

wherein R is₁And R₂Represents methyl, sec-butyl or tert-butyl.

3. An optical data carrier according to claim 1, wherein the phosphite is (2, 4, 6-tri-tert-butylphenyl) - (2-butyl-2-ethyl-propane-1, 3-diyl) phosphite of the formula,

4. an optical data carrier as claimed in any one of claims 1 to 3, wherein the release agent is a polyol with C_16-22Esters of long-chain carboxylic acids, and which also contain at least one free OH group.

5. An optical data carrier as claimed in any one of claims 1 to 3, wherein the release agent is a partial ester of a saturated monobasic fatty acid containing 16 to 22 carbon atoms and at least one member selected from glycerol, trimethylolpropane and pentaerythritol.

6. An optical data carrier as claimed in any one of claims 1 to 3, wherein the polycarbonate has a molecular weight of from 15,000 to 35,000.

7. An optical data carrier according to any one of claims 1 to 3, wherein the release agent is present in an amount of 0.01 to 1.5% by weight and the phosphite is present in an amount of 0.001 to 0.1% by weight, relative to the weight of the composition.