MXPA01008863A - Stabilized telecommunication cable insulation composition - Google Patents

Abstract

Polyolefin wire insulation in hydrocarbon grease filled telecommunications cable which is subsequently exposed in an outdoor interconnection box is especially vulnerable to the adverse conditions of heat, oxygen and moisture. The combination of one or more primary phenolic antioxidants selected from N,N'- hexane-1, 6-diylbis- (3- (3, 5-di-tert-butyl-4-hydroxyphenylpropionamide), tris(3,5-di-tert-butyl- 4-hydroxybenzyl) isocyanurate and tris(2-(3,5-di-tert-butyl-4- hydroxydrocinnamoyloxy)ethyl) isocyanurate together with one or more alkyhydroxyphenylalkanoil hydrazine metal deactivators is very effective towards providing oxidative stability for polyolefin wire insulation under these conditions.

Description

i COMPOSITION OF INSULATION FOR CABLE OF TELECOMMUNICATIONS, STABILIZED The present invention relates to a polyolefin composition for use as insulation for wire and cable, which has improved resistance to the harmful effects of heat, oxygen and moisture. The stabilized compositions are suitable for use as telecommunications (telecom) cables. A typical telecommunications cable is constructed of twisted pairs of copper wire insulated with polyolefin, which are collected and protected by a cable jacket. The cable jacket is composed of a thin metal sheet and / or reinforcement in combination with a polymeric lining material. The whole system is referred to as "telecommunications cable". To reduce the risk of water penetration into the cable system and minimize the harmful effects of moisture on the polyolefin insulation, the system becomes watertight by filling the gaps in the cable with a hydrophobic grease. Cable systems of this type are described, for example, in U.S. Pat. Nos. 3,888,709, 4,044,200, 4,218,577, 5,502,288 and European patent application 565,868 A2; and the references cited there. The cable-filled grease is known to extract stabilizers incorporated in the insulation of the wire.

This is discussed, for example, in "Plastics Additives Handbook," 3rd Edition, R. G chter, H. Müller, Eds., Hanser Publishers, pages 116-119 (1990)]. The joining of two or more telecommunication cables is often required and this is achieved in an outdoor enclosure known as a pedestal or interconnection box. Inside the pedestal, the cable liner is removed, the grease-filled cable is cleaned and the transmission wires are attached as necessary. The isolated exposed wires are now subjected to adverse conditions of heat, oxygen and moisture. The polyolefin insulation having lost a portion of its stabilizing additives for extraction by filler grease, is especially vulnerable to these environmental conditions and may exhibit premature oxidative failure. This failure is exhibited in the loss of physical properties of the insulation that ultimately results in a loss of electrical transmission performance. The stabilization of polyolefin wire insulation in telecommunications applications with hindered phenolic antioxidants is known. A stabilizing system of the state of the art includes the use of a hindered phenol together with a metal deactivator such as Irganox ™ MD 1024, 1,2-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine or Naugard ™. XL-1, 2,2'-oxalydiamido-bis- [eti 13 - (3,5-di-tert-butyl-4-hydroxylphenyl) propionate]. A typical stabilizer package includes as a primary antioxidant, Irganox ™ 1010, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate], and as the metal deactivator, Irganox ™ MD 1024. This system describes in the European patent application 565,868 A2 and in the US patents Nos. 4,044,200, 5,380,591 and 5,575,952. Irganox ™ is a protected trademark of Ciba Specialty Chemicals Corp., Naugard ™ is a protected trademark of Uniroyal. The patent of the U.S.A. No. 4,044,200 discloses the stabilization of polyethylene wire insulation in the presence of a moisture barrier filler with a combination of an alkylhydroxyphenylallanyl hydrazide and / or a substituted triazole amido together with a hindered high molecular weight phenolic antioxidant. The combination of Irganox ™ MD 1024 and Irganox ™ 1010 is specifically described. U.S. Pat. No. 4,812,500 discloses a polyolefin composition having improved resistance to deterioration when exposed to hot oxygenated water, chlorinated water and UV radiation. The composition comprises a hindered amine UV stabilizer, a hindered phenolic thermal stabilizer and a chelating agent (metal deactivator). The hindered phenolic is chosen from a specific group that includes Irganox ™ 1010, pentaerythritol tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] and Irganox ™ 3114, tris (3,5-di-tert-butyl-4-hydroxybenzyl) -isocyanurate. The chelating agent is selected from a group including Irganox ™ MD 1024, 1,2-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine. Irganox ™ is a trademark of Ciba Specialty Chemicals Corp. It is contemplated that the invention may be employed for various systems where water or moisture are present, including cable and wire coatings. There is no mention of cable systems with fat filling, where there is the potential for extraction of the additives. The patents of the U.S.A. Nos. 5,380,591, 5,453,322, 5,575,952, 5,766,761 and 5,807,635 describe the stabilization of telephone cables with hydrocarbon grease fillers, with the combination of a mixture of an alkylhydroxyphenylallanyl hydrazine with a functionalized hindered amine. Irganox ™ MD 1024 is specifically described as the hydrazine in each case. The patent of the U.S.A. No. 5,474,847 illustrates the stabilization of polyolefin wire insulation in telephone cables filled with grease, with the reaction products of hydrazide derivatives of hindered phenols or hindered amines or amino derivatives of hindered amines with a quinone. The patent of the U.S.A. No. 5,502,288 describes the stabilization of polyolefin wire insulation in telephone cables with the use of Irganox ™ MD 1024 or Naugard ™ XL-1 or mixtures thereof with selected antioxidants. European Patent Application 565,868 A2 illustrates the stabilization of polyolefin wire insulation compositions exposed to cable fillers for blocking water with a combination of divalent metal salts of phosphonic or phenolic carboxylic acids together with a metal deactivator. Metal deactivators specifically named are Irganox ™ MD 1024 and Naugard ™ XL-1. A preferred composition also includes the use of Irganox ™ 1010. WO 93/24935 illustrates the use of reaction products of an anhydride of an unsaturated aliphatic diacid with one or more functionalized hindered amines and / or functionalized hindered phenols for the stabilization of wire insulation. of polyolefin in phone cables with fat filler. WO 93/24938 discloses a cable construction with grease filler wherein the insulation of polyolefin wire that has been bonded thereto, through an anhydride of an aliphatic diacid, one or more functionalized hindered amines and / or functionalized hindered phenols . In order to protect the wire-polyolefin insulation that is exposed to environmental conditions in the interconnection box and to counter-attack the removal of stabilizers by the cable filler grease, it has been suggested that high loads of the stabilizing system be employed. There is a need to find primary metal / antioxidant deactivant combinations more efficient than those of the prior art in order to reduce the high cost associated with the use of these levels of stabilizers. The stabilizing efficiency in this context is the combined ability of the stabilizing system to resist removal of the polyolefin wire insulation in the cable filler grease and provide the polyolefin with resistance to the harmful effects of heat, oxygen and moisture. Surprisingly, it has been found that the combination of one or more primary phenolic antioxidants selected from Irganox ™ 1098, N, N '-hexane-1,6-diylbis- (3- (3,5-di-tert-butyl-4) -hydroxyphenylpropionamide)), Irganox® 3114, tris (3,5-di-tert-butyl-4-hydroxybenzyl) isocyanurate, and Irganox ™ 3125, tris (2 - (3,5-di-1er-but-yl-4-hydroxyhydrocinnamoxy) ethyl) isocyanurate, together with one or more metal deactivators of alkylhydroxyphenylallanyl hydrazine is especially effective at providing oxidative stability for polyolefin wire insulation in grease-loaded telecommunications cable. Irganox ™ is a trademark of Ciba Specialty Chemicals Corp. The present invention relates to a cable construction with novel hydrocarbon grease filler wherein the polyolefin wire insulation has improved oxidative stability. More particularly, the novel cable construction of this invention comprises (i) a plurality of isolated electrical conductors having interstices therebetween, the insulation comprising (a) one or more polyolefins, and (b) one or more selected primary antioxidants. from the group of N, N '-hexane-1,6-diylbis- (3- (3,5-di-tert-butyl-4-hydroxyphenylpropionamide)), tris (3,5-di-tert-butyl-4- hydroxybenzyl) isocyanurate and tris (2- (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy) ethyl) isocyanurate, and (c) one or more metal metal deactivators selected from alkylhydroxyphenylalkanoyl hydrazines, and (ii) hydrocarbon cable filler grease within the interstices; and (iii) a liner surrounding the components (i) and (ii). The polyolefins of component (a) are generally thermoplastic resins that are crosslinkable. They may be homopolymers or copolymers produced from two or more comonomers, or a mixture of two or more of these polymers, conventionally employed in film, sheet and piping materials and as plywood and / or • insulation in wire and cable applications. . The monomers useful in the production of these homopolymers and copolymers can have from 2 to 20 carbon atoms, and preferably from 2 to 12 carbon atoms. Examples of these monomers are alpha-olefins such as ethylene, propylene, 1-butene, 1-hexene, 4-methyl-1-pentene, and 1-octene; unsaturated esters such as vinyl acetate, ethyl acrylate, methyl acrylate, methyl methacrylate, t-butyl acrylate, n-butyl acrylate, n-butyl methacrylate, 2-ethylhexyl acrylate, and other alkyl acrylates; diolefins such as 1,4-pentadiene, 1,3-hexadiene, 1,5-hexadiene, 1,4-octadiene, and ethylidene norbornene, commonly the third monomer in a terpolymer; other monomers such as styrene, p-methyl styrene, alpha-methyl styrene, p-chlorostyrene, vinyl naphthalene, and the like aryl olefins; nitriles such as acrylonitrile, methacrylonitrile, and alpha-chloroacrylonitrile; vinyl methyl ketone, vinyl methyl ether, vinylidene chloride, maleic anhydride, vinyl chloride, vinylidene chloride, vinyl alcohol, tetrafluoroethylene and chlorotrifluoroethylene; and acrylic acid, methacrylic acid and other similar unsaturated acids. The referred homopolymers and copolymers can be non-halogenated or halogenated in conventional manner, generally with chlorine or bromine. Examples of halogenated polymers are polyvinyl chloride, polyvinylidene chloride and polytetrafluoroethylene. Homopolymers and copolymers of ethylene and propylene are preferred, both in the non-halogenated and halogenated form. Preferred in this preferred group are terpolymers such as diene monomer / propylene / ethylene rubbers. Other examples of ethylene polymers are as follows: a high pressure ethylene homopolymer; a copolymer of ethylene and one or more alpha-olefins having 3 to 12 carbon atoms; an ethylene homopolymer or copolymer having a hydrolysable silane grafted onto its main structures; a copolymer of ethylene and alkenyl trialkyloxy silane such as trimethoxy vinyl silane; or a copolymer of an alpha-olefin having 2 to 12 carbon atoms and an unsaturated ester having 4 to 20 carbon atoms, for example an ethylene / ethyl acrylate or vinyl acetate copolymer; a hydrolyzable ethylene / ethyl acrylate or vinyl acetate / silane terpolymer; and ethylene / ethyl acrylate or vinyl acetate copolymers, which have a hydrolysable silane grafted to their main structures. With respect to polypropylene: Homopolymers and copolymers of propylene and one or more other alpha-olefins wherein the portion of the propylene-based copolymer is at least about 60 weight percent based on the weight of the copolymer can be used to provide the polyolefin of the invention. Preferred alpha olefin polypropylene comonomers are those having 2 or 4 to 12 carbon atoms. Polyolefins, ie the polymers of monoolefins previously exemplified, for example polyethylene and polypropylene, can be prepared by different methods, especially the following: 1) radical polymerization (usually with high pressure and at elevated temperature). 2) catalytic polymerization using a catalyst that normally contains one or more than one metal of groups IVb, Vb, VIb or VIII of the Periodic Table. These metals usually have one or more than one ligand, typically oxides, halides, alcoholates, esters, ethers, amines, alkyls, alkenyls and / or aryls, which may be p- or s -scoordinated. These metal complexes can be in the free form or fixed in substrates, typically in activated magnesium chloride, titanium (III) chloride, alumina or silicon oxide. These catalysts can be soluble or insoluble in the polymerization medium. The catalysts can be used by themselves in the polymerization or additional activators, typically metal alkyls, metal hydrides, metal alkyl halides, metal alkyl oxides or metal alkyloxanes can be used, the metals are elements of the groups la, lia and / or Illa of the Periodic table. The activators can be conveniently modified with additional ester, ether, amine or silyl ether groups. These catalyst systems are usually referred to as Phillips, Standard Oil Indiana, Ziegler (-Natta), TNZ (DuPont), metallocene or single site catalysts (SSC = Single Site Catalysts). The homopolymers or copolymers can be entangled or cured with an organic peroxide, or to make them hydrolysable, they can be grafted with alkenyl trialkoxy silane in the presence of an organic peroxide which acts as a free radical generator or catalyst. Useful alkenyl trialkoxy silanes include vinyl trialkoxy silanes such as vinyl trimethoxy silane, vinyl triethoxy silane and vinyl triisopropoxy silane. The alkenyl and alkoxy radicals may have 1 to 30 carbon atoms and preferably have 1 to 12 carbon atoms. The hydrolysable polymers can be cured by moisture in the presence of a silanol condensation catalyst such as dibutyl tin dilaurate, dioctyl tin maleate, stannous acetate, stannous octoate, lead naphthenate, zinc octoate, iron 2-ethyl hexoate, and others metal carboxylates. Ethylene homopolymers or copolymers wherein ethylene is the primary comonomer and the propylene homopolymers and copolymers where propylene is the primary comonomer, can be referred to herein as polyethylene and polypropylene, respectively. The polyolefins of component a) are preferably polyethylene or polypropylene or mixtures thereof. The alkylhydroxyphenylallanyl hydrazines of component (c) is described in U.S. Pat. Nos. 3,660,438 and 3,773,722. Preferably, the compounds of component (c) are of the following structure: wherein n is 0 or an integer from 1 to 5; R x is a straight or branched chain alkyl having 1 to 6 carbon atoms; R2 is hydrogen or Rx, - and R3 is hydrogen, an alkanoyl having 2 to 18 carbon atoms, or a group of the formula wherein n, R and R2 independently have the same definitions as before. The radical R2 is preferably in the ortho position with respect to the OH group. Preferably, the metal deactivator of component (c) is Irganox ™ MD 1024, 1,2-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine, Ciba Specialty Chemicals Corp. The filler grease for cable of hydrocarbon of component (ii), is a mixture of hydrocarbon compounds that is semi-solid at the temperatures of use.

Industrially it is known as "cable-filled compound". A typical requirement for cable filler compounds is that the grease has minimal leakage from the cutting end of a cable at 60 ° C or a higher temperature rating. Another typical requirement is that the grease resist water leakage through a short section of cut wire when water pressure is applied at one end. Among other typical requirements are competitiveness in cost; minimal detrimental effect on signal transmission; minimal detrimental effect on the typical characteristics of the materials of cable lining and polymer insulation; thermal and oxidative stability; and cable manufacturing processability. Cable fabrication can be achieved by heating the cable-filled composite to a temperature of approximately 100 ° C. This liquefies the filler or filler compound in such a way that it can be pumped into the multi-conductor cable core to completely impregnate the interstices and eliminate all air space. Alternatively, thixotropic cable filler compounds using shear induced flux can be processed at reduced temperatures in the same way. A cross-section of a cable transmission core with typical finished grease filler is constituted by approximately 52 percent insulated wire and approximately 48 percent interstices in terms of the total cross-sectional areas. Since the interstices are completely filled with the cable filler compound, a filled cable core typically contains approximately 48 volume percent cable filler compound. The cable filler compound or one or more of its hydrocarbon constituents enters the insulation through absorption of the interstices. In general, the insulation absorbs about 3 to about 30 by weight of the cable filler compound or one or more of its hydrocarbon constituents, in total, based on the weight of polyolefin insulation. A typical absorption is in the range of about 5 to about 25 weight percent based on the weight of polyolefin. Cable filler compound generally contains hydrocarbons with varying molecular weights. The absorption of the cable filling compound in the polyolefin or swelling insulation is preferential for the lower molecular weight constituents of the cable-filled composite. This swelling of the polyolefin insulation results in migration of additives by the insulation to the cable filler compound as discussed above. The presence of the cable filler compound therefore presents an additional obstacle to stabilizing the polyolefin insulation.

Examples of hydrocarbon cable filler grease (cable filler compound) are petrolatum; mixtures of polyolefin / petrolatum wax; oil-modified thermoplastic rubber (ETPR or extended thermoplastic rubber); paraffin oil; naphthenic oil; mineral oil; the aforementioned oils thickened with a residual oil, petrolatum or wax; polyethylene wax; rubber block / mineral oil copolymer mixture; lubricant grease; and various mixtures thereof, all of which meet industrial requirements similar to those described above. In addition to resisting the extraction of antioxidants, the stabilized wire-polyolefin insulation formulation must be able to withstand any constituents that absorb destabilizing effect that the cable filler composite may have. In addition, the stabilization package must mediate against the copper wire conductor, which is a potential catalyst for the oxidative degradation of polyolefin, and must also counter-attack the effect of chemical blowing agent residues present in the polymeric foamed insulation ( foam / skin) solid / cellular and cellular.

In addition to components (b) and (c), the insulation of the cable construction of this invention may comprise additional co-stabilizers (additives) such as, for example, the following: 1. Antioxidants 1.1. 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-diol -tert-butyl-4-n-butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol, 2- (methyl-cyclohexyl) -4,6-dimethylphenol, 2, 6-dioctadecyl-4-methylphenol, 2,4,6-tricyclohexylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, nonylphenols which are linear or branched in the secondary chains, for example, 2,6-dihydroxybenzoate, 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. Alkyltiomethylphenols, for example 2,4-dioctylthiomethyl-6-tert-butylphenol, 2,4-dioctylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-di-dodecylthiomethyl-4-nonylphenol. 1.3. 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-hydroxyanisole, 3,5-di-tert-butyl-4 -hydroxyphenyl stearate, bis- (3, 5-di-tert-butyl-4-hydroxyphenyl) adipate. 1.4. Tocopherols, for example a-tocopherol, b-tocopherol, g-tocopherol, d-tocopherol and their mixtures (Vitamin E). 1.5. Hydroxylated thiodiphenyl ethers, for example 2,2'-thiobis (6-tert-butyl-4-methylphenol), 2,2'-thiobis (4-octylphenol), 4,4'-thiobis (6-tert-butyl-3) -methylphenol), 4,4'-thiobis (6-tert-butyl-2-methylphenol), 4,4'-thiobis- (3,6-di-sec-amylphenol), 4,4'-bis (2, 6-dimethyl-4-hydroxyphenyl) disulfide. 1.6. Alkylidenebisphenols, for example 2,2'-methylenebis (6-tert-butyl-4-methylphenol), 2,2'-methylenebis (6-tert-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-tert-butylphenol), 2,2'-ethylidenebis (4,6-di-tert-butylphenol), 2,2'-ethylidebis (6-tert-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-tert-butylphenol), 4,4'-methylenebis (6-tert-butyl-2-methylphenol), 1,1-bis (5-tert-butyl-4-hydroxy-2-methylphenyl) butane, 2,6 -bis (3-tert-butyl-5-methyl-2-hydroxybenzyl) -4-methylphenol, 1, 1, 3 -tris (5-tert-butyl-4-hydroxy-2-methyl phenyl) butane, 1, 1 bis (5-tert-butyl-4-hydroxy-2-methyl-phenyl) -3-n-dodecyl mercaptobutane, ethylene glycol bis [3, 3-bis (3-tert-butyl-4-hydroxyphenyl) butyrate], bis (3-tert-butyl-4-hydroxy-5-methyl-f-enyl) ) dicyclopentadiene, bis [2- (3'-tert-butyl-2-hydroxy-5-methyl-ylbenzyl) -6-tert-butyl-4-methylphenyl] terephthalate, 1,1-bis- (3,5-dimethyl) 2-hydroxy-enyl) -butane, 2,2-bis- (3,5-di-tert-butyl-hydroxyphenyl) -panolene, 2,2-bis- (5-tert-butyl-4-hydroxy-2-methyl-phenyl) ) -4-n-dodecyl mercaptobutane, 1,1,5,5-tetra- (5-tert-butyl-4-hydroxy-2-methyl phenyl) pentane. 1.7. Compounds 0-, N- and S-benzyl, for example 3, 5, 3 ', 5' -tetra-tert-butyl-4,4 '-dihydroxydibenzyl ether, octadecyl-4-hydroxy-3, 5 -dimethyl-ilbenzylmercaptoacetate, 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. 1.8. Hydroxybenzyl malonates, for example dioctadecyl-2,2-bis- (3,5-di-tert-butyl-2-hydroxybenzyl) -malonate, di-octadecyl-2- (3-tert-butyl-4-hydroxy-5-hydroxy) methylbenzyl) -malonate, di-dodecylmercaptoethyl-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. 1. 9. 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 -dieth-butyl-4-hydroxybenzyl) -2,3,5,6-tetramethylbenzene, 2,4,6-tris (3,5-di-tert-butyl-4-hydroxybenzyl) phenol. 1.10. 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-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. 1.11. Benzylphosphonates, for example dimethyl-2, 5-di-tert-butyl-4-hydroxybenzylphosphonate, diethyl-3,5-di-tert-butyl-4-hydroxybenzylphosphonate, dioctadecyl-3, 5-di-tert-butyl-4-hydroxybenzylphosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3-methylbenzylphosphonate, calcium salt of 3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester. 1. 12. Acylaminophenols, for example 4-hydroxylauranylide, 4-hydroxysteatenylidene, octyl N- (3,5-di-tert-butyl-4-hydroxyphenyl) carbamate. 1.13. Esters of b- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid with mono- or polyhydric alcohols, for example with methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol , 1, 9-nonandiol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol , 3-thiapentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-l-phospha-2,6,6-trioxabicyclo [2.2.2] octane. 1.14. Esters of b- (5-tert-butyl-4-hydroxy-3-methylphenyl) propionic acid with mono- or polyhydric alcohols, for example with 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-thiaundecanol, 3-thiapentadecanol, trimethylhexandiol, trimethylolpropane, 4-hydroxymethyl-l-phospha- 2, 6, 7-trioxabicyclo [2.2.2] octane. 1.15. Esters of b- (3,5-dicyclohexyl-4-hydroxyphenyl) propionic acid with mono- or polyhydric alcohols for example with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonandiol, ethylene glycol, , 2-propanediol, neopentyl glycol, tiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexandiol, trimethylolpropane, 4- hydroxymethyl-1-phospha- 2, 6, 7-trioxabicyclo [2.2.2] octane. 1.16. Esters of 3,5-di-tert-butyl-4-hydroxyphenyl acetic acid with mono- or polyhydric alcohols, for example with methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonandiol, ethylene glycol, 1,2-propanediol, neopentyl glycol, tiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris (hydroxyethyl) isocyanurate, N, N'-bis (hydroxyethyl) oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexandiol, trimethylolpropane, -hydroxymethyl-1-phospha-2, 6, 7-trioxabicyclo [2.2.2] octane. 1.17. Amides of b- (3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid for example N, N'-bis (3,5-di-tert-butyl-4-hydroxyphenylpropionyl) hexamethylenediamide, N, N ' bis (3, 5-di-tert-butyl-4-hydroxyphenylpropionyl) -trimethylenediamide, N, N'-bis (3,5-di-tert-butyl-4-hydroxyphenylpropionyl) hydrazide, N, N'-bis [ 2- (3- [3,5-di-tert-butyl-4-hydroxyphenyl] propionyloxy) ethyl] oxamide (Naugard ™ XL-1 supplied by Uniroyal). 1.18. Ascorbic acid (Vitamin C) 1.19. Amine antioxidants, for example N, N'-di-isopropyl-p-phenylenediamine, N, N'-di-sec-butyl-p-phenylenediamine, N, N'-bis (1,4-dimethylpentyl) -p-phenylenediamine, N , N'-bis (l-ethyl-3-methylpentyl) -p-phenylenediamine, N, N'-bis (1-methylheptyl) -p-phenylenediamine, N, N '-dicyclohexyl-p-phenylenediamine, N, N' -diphenyl-p-phenylenediamine, N, N'-bis (2-naphthyl) -p-phenylenediamine, 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) diphenylamine, N, N'-dimethyl -N, '-di-sec-butyl-p-phenylenediamine, diphenylamine, N-allyldiphenylamine, 4 - . 4-isopropoxydiphenylamine, N-phenyl-1-naphthylamine, N- (4-tert-octylphenyl) -1-naphthylamine, N-phenyl-2-naphthylamine, octylated diphenylamine, for example p, p'-di-ter-oc ti 1 di f eni 1 amine, 4-n-bu ti 1 amino f ene 1,4-butyrylaminophenol, 4-nonanoylaminophenol, 4-dodecanoylamino-phenol, 4-octadecanoylaminophenol, bis (4-methoxyphenyl) amine, 2, 6 di-tert-butyl-4-dimethylaminomethylphenol, 2,4'-diaminodiphenylmethane, 4,4'-diaminodiphenylmethane, N, N, N ', N'-tetramethyl-4,4'-diaranediphenylmethane, 1,2-bis [( 2-methylphenyl) amino] ethane, 1,2-bis (phenylamino) propane, (o-tolyl) biguanide, bis [4- (1 ', 3'-dimethylbutyl) phenyl] amine, N-phenyl-1-naphthylamine ter -octylated, a mixture of mono- and dialkylated tert-butyl / tert-butyl octyldiphenylamines, a mixture of mono- and dialkylated nonildif enylamines, a mixture of mono- and dialkylated dodecyldifenylamines, a mixture of mono- and dialkylated isopropyl / isohexyldifenylamines, a mixture of mono- and dialkylated tert-butyldifenylamines, 2, 3 -dihydro-3, 3-dimethyl-4H-l, 4-benzothiazine, phenothiazine, a mixture of mono- and dialkylated ter-butyl / tert-octylf enothiazines, a mixture of mono- and dialkylated tert-octyl-f-enothiazines, N -alilf enotiazine, N, N, N ', N'-tetraphenyl-1,4-diaminobut-2-ene, N, -bis (2, 2,6,6-tetramethyl-piperid-4-yl-hexamethylenediamine, bis (2, 2,6,6-tetramethylpiperid-4-yl) sebacate, 2, 2, 6, 6-tetramethylpiperidin-4-one, 2,2,6,6-tetramethylpiperidin-4-ol. 2. UV absorbers and light stabilizers 2.1. 2- (2-Hydroxyphenyl) benzotriazoles, for example 2- (2-hydroxy-5-methylphenyl) -benzotriazole, 2- (3,5-di-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (5-ter -butyl-2-hydroxyphenyl) benzotriazole, 2- (2-hydroxy-5- (1,1,3,3-tetramethylbutyl) phenyl) benzotriazole, 2- (3,5-di-tert-butyl-2-hydroxyphenyl) -5-chloro-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5-methylphenyl) -5-chloro-benzotriazole, 2- (3-sec-butyl-5-tert-butyl-2-hydroxyphenyl) benzotriazole, 2- (2-hydroxy-4-octyloxyphenyl) benzotriazole, 2- (3,5-di-tert-amyl-2-hydroxyphenyl) benzotriazole, 2- (3,5-bis- (, a-dimethylbenzyl) - 2-hydroxyphenyl) benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-octyloxycarbonylethyl) phenyl) -5-chloro-benzotriazole, 2- (3-tert-butyl-5- [2- ( 2-ethylhexyloxy) -carbonylethyl] -2-hydroxy-enyl) -5-chloro-benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-methoxycarbonylethyl) phenyl) -5-chloro-benzotriazole, - (3-tert-Butyl-2-hydroxy-5- (2-methoxycarbonylethyl) -phenyl) -benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-octyloxy -carbonylethyl) phenyl) benzotriazole, 2- (3-tert-butyl-5- [2- (2-ethylhexyloxy) carbonylethyl] -2-hydroxy phenyl) benzotriazole, 2- (3-dodecyl-2-hydroxy-5-methyl) enyl) benzotriazole, 2- (3-tert-butyl-2-hydroxy-5- (2-isooctyloxycarbonylethyl) -phenylbenzotriazole, 2,2'-methylene-bis [4- (1, 1,3,3-tetramethylbutyl) - 6-benzotriazol-2-ylfolol]; the product of t rans is t er i fication of 2 - [3-t er-but-il-5 - (2-methoxycarbonylethyl) -2-hydroxy-enyl] -2H-benzotriazole with polyethylene glycol 300; [R-CHzCHz-COO-C ^ CHz] - ^ where R = 3 '-tert-butyl-4' -hydroxy-5'-2H-benzotriazol-2-ylfenyl, 2- [2-hydroxy-3- (a, a-dimethylbenzyl) -5- (1, 1, 3, 3-tetramethylbutyl) -phenyl] benzotriazole; 2- [2-Hydroxy-3 - (1,1,3,3-tetramethylbutyl) -5- (, -dimethylbenzyl) -phenyl] -benzotriazole. 2.2. 2-Hydroxybenzofenones, for example the 4-hydroxy, 4-methoxy, 4-octyloxy, 4-decyloxy, 4-dodecyloxy, 4-benzyloxy, 4, 2 ', 4'-trihydroxy and 2'-hydroxy-4 derivatives, 4'-dimethoxy. 2. 3. Substituted and unsubstituted benzoic acid esters such as for example 4-tert-butyl-phenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoyl resorcinol, bis (4-tert-butylbenzoyl) resorcinol, benzoyl resorcinol, 2,4-di-ter -butylphenyl 3, 5-di-tert-butyl-4-hydroxybenzoate, hexadecyl-3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl-3, 5-di-tert-butyl-4-hydroxy-benzoate, 2- methyl-4,6-di-tert-butylphenyl-3,5-di-tert-butyl-4-hydroxybenzoate. 2.4. Acrylates, for example ethyl a-cyano-b, b-diphenylacrylate, isooctyl a-cyano-b, b-diphenylacrylate, methyl-carbomethoxycinnamate, methyl-cyano-b-methyl-p-methoxy-cinnamate, butyl-cyano-b-methyl-p-methoxy-cinnamate, methyl-carbomethoxy-p- methoxycinnamate and N- (b-carbomethoxy-b-cyanovinyl) -2-methylindoline. 2.5. Nickel compounds, for example 2, 2'-thio-bis- [4- (1, 1, 3, 3-tetramethylbutyl) phenol] nickel complexes, such as the 1: 1 or 1: 2 complex, with or without additional ligands such as n-butylamine, triethanolamine or N-cyclohexyldiol and anol amine, nickel dibutyldithiocarbamate, nickel salts of the monoalkyl esters, for example methyl or ethyl ester, of 4-hydroxy-3, 5- di-tert-butylbenzylphosphonic, nickel complexes of ketoximes, for example of 2-hydroxy-4-methylphenyl undecylketoxime, nickel complexes of 1-phenyl-4-lauroyl-5-hydroxypyrazole, with or without additional ligands. 2.6. Spherically 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 (l-octyloxy-2, 2,6,6-tetramethi-4-piperidyl) sebacate, bis (1,2,6,6-pentamethyl-4-) piperidyl) n-butyl-3,5-di-tert-butyl-4-hydroxybenzylmalonate, the condensate of 1- (2-hydroxyethyl) -2,6,6-tetramethyl-4-hydroxypiperidine and succinic acid, linear condensates or cyclic N, N'-bis (2, 2, 6, 6-tetramet-il-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-butane-tetracarboxylate, 1,1 '- ( 1,2-ethanediyl) -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) -tert-butylbenzyl) malonate, 3-n-octyl-7,7,9, 9-tetramethyl-1,3,8-triazaspiro [4.5] decan-2,4-dione, bis (l-octyloxy-2, 2 , 6,6-tetramethylpiperidyl) sebacate, bis (l-octyloxy-2, 2,6,6-tetramethoxyperidyl) succinate, linear or cyclic condensates of N, N'-bis- (2, 2, 6,6-tetramethyl) -4-piperidyl) hexamethylenediamine and 4-morpholin-2,6-dichloro-1,3,5-triazine, the condensate of 2-chloro-4,6-bis (4-n-butylamino-2,2,6, 6-tetramethylpiperidyl) -1,3,5-triazine and 1,2-bis (3-aminopropylamino) ethane, the condensate of 2-chloro-4,6-di- (4-n-butylamino-l, 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-3, , 8-triazaspiro [4.5] decan-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, a mixture of 4-hexadecyloxy- and 4-stearyloxy-2,2,6,6-tetramethylpiperidine, a product of condensation of N, N'-bis (2, 2, 6,6-tetramethyl-4-piperidyl) hexamethylenediamine and 4-cyclohexylamino-2,6-dichloro-1,3,5-triazine, a condensation product of 1 , 2-bis (3-aminopropylamino) ethane and 2,4,6-trichlor-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-dodecyl succinimide, N- (1,2,2,6,6-pentamethyl-4-piperidyl) -n-dodecyl succinimide, 2-undecyl- 7, 7, 9, 9-tetramethyl-l-oxa-3, 8-diaza-4-oxo-spiro [4, 5] decane, a reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl -l -oxa-3, 8-diaza-4 -oxoespiro [4,5] decane and epichlorohydrin, 1, 1-bis (1, 2, 2, 6, 6-pentamethyl-4-piperidyloxycarbonyl) -2- (4-methoxy-enyl) ethene, N, N'-bis-formyl-N, N'-bis (2, 2, 6, 6-emethyl-4-piperidyl) hexamethylenediamine, 4-methoxy-me ti -malonic acid diester with 1, 2, 2 , 6, 6 -pent ame thi 1 - 4 -hydroxypiperidine, poly [methylpropyl-3 -oxy-4 - (2,2,6,6-tetramethyl-4-piperidyl)] siloxane, a copolymer reaction product of -olefin-maleic acid anhydride with 2, 2, 6, 6-tetramethyl-4-aminopiperidine or 1, 2, 2, 6, 6-penta-methyl-4-aminopiperidine. 2.7. Oxamides, for example 4,4'-dioctyloxyoxanilide, 2,2 '-dietoxyoxanilide, 2,2'-dioctyloxy-5,5'-di-tert-butoxyanilide, 2,2'-didodecyloxy-5, 5'-di- ter-butoxyanilide, 2-ethoxy-2'-ethyloxanilide, N, N'-bis (3-dimethylaminopropyl) oxamide, 2-ethoxy-5-tert-butyl-2'-ethoxyanilide and its mixture with 2-ethoxy-2 ' -ethyl-5,4'-di-tert-butoxyanilide, mixtures of o- and p-methoxy-disubstituted oxanilides and mixtures of o- and p-ethoxy-disubstituted oxanilides. 2.8. 2- (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-trideyloxyphenyl) -, 6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2 - [2-hydroxy-4 - (2 - hydroxy-3-butyloxypropoxy) phenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [2-hydroxy-4- (2-hydroxy-3-octyloxy-propyloxy) phenyl] -4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 2- [4- (dodecyloxy / tridecyloxy-2-hydroxypropoxy) -2-hydroxy-phenyl] -4,6- bis (2,4-di-methylphenyl) -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-hexxyloxy) phenyl-4,6-diphenyl-l, 3,5-triazine, 2- (2-hydroxy- 4-methoxyphenyl) -4,6-diphenyl-l, 3,5-triazine, 2,4,6-tri s [2-hydroxy-4- (3-butoxy-2-hydroxypropoxy) 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-oxy) -2-hydroxypropyloxy] phenyl} 4,6-bis (2,4-dimethylphenyl) -1,3,5-triazine, 4,6-bis (2,4-dimethylphenyl) -2- [2-hydroxy-4 - (2-hydroxy-3 -noniloxypropoxy) -5- (1-methyl-1-phenylethyl) phenyl] -1,3,5-triazine. 3. Metal deactivators, for example N, N'-diphenyloxamide, N-salicylal-N '-salicyloyl hydrazine, N, N'-bis (salicyloyl) hydrazine, N, N'-bis (3,5-di-ter) -butyl-4-hydroxyphenylpropionyl) hydrazine, 3-alkylarylamino-1, 2,4-triazole, bis (benzilidene) oxalyl dihydrazide, oxanilide, isophthaloyl dihydrazide, sebacoyl bisphenylhydrazide, N, N'-diacetyladipyl dihydrazide, N, N'-bis (salicyloyl) oxalyl dihydrazide, N, N'-bis (salicyloyl) thiopropionyl dihydrazide. 4. Phosphites and phosphonites, for example triphenyl phosphite, diphenyl alkyl phosphites, phenyl dialkyl phosphites, 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-methyl-yl-enyl) -pentaerythritol diphosphite, diisodecyl-oxypentaerythritol diphosphite, bis (2, 4-di -tert-butyl-6-methylphenyl) pentaerythritol diphosphite, bis (2,4,6-tris (tert-butylphenyl) pentaerythritol diphosphite, tristearyl sorbitol trifosphite, tetrakis (2,4-di-tert-butylphenyl) 4, 4 '- biphenylene diphosphonyl, 6-isooctyloxy-2, 4, 8, 10 -tetra-tert-butyl-dibenzo [d, f] [1, 3, 2] dioxaphosphepine, 6-fluoro-2, 4, 8, 10-tetra- ter-but-il-12-methyl-dibenzo [d, g] [1,3,2] dioxaphosphocin, bis (2,4-di-tert-butyl-6-methylphenyl) methyl phosphite, bis (2,4-di) -tert-butyl-6-methylphenyl) ethyl phosphite, 2, 2 ', 2"-nitrile [triethyltris (3.3', 5,5'-tetra-tert-butyl-1, 1 '-biphenyl-2,2'-diyl) phosphite], 2-ethylhexyl (3,3', 5, 5'-tetra-tert-butyl-1, 1 '-biphenyl -2, 2'-diyl) phosphite. The following phosphites are especially preferred: Tris (2,4-di-tert-butylphenyl) phosphite (Irgafos®) 168, Ciba Specialty Chemicals Corp.), tris (nonylphenyl) phosphite, () H37Ci-0 - (Q) 5. Hydroxylamines, for example N, N-dibenz i 1 hydroxylamine, N, N-diethylhydroxylamine, N, N-dioctylhydroxylamino a, N, N-dilaurylhydroxylamine, N, N-ditetradecylhydroxy N, N, N-dihexadecylhydroxylamine, N, N-dioctadecyl hydroxyl amine, N-hexade cy 1-N -octadecylhydroxylamine, N-heptadecyl-N-octadec and 1 hydroxylamine, N, N- dialkylhydroxylamine derived from hydrogenated tallow amine, N, N-di (alkyl) hydroxylamine produced by the direct oxidation of N, N-di (hydrogenated tallow) amine. 6. Nitrodes, for example N-benzyl-alf af enyl-nitrona, N-ethyl-al a-methyl-nitrona, N-octyl-alpha-heptunitrona, N-lauryl-a fa-undecyl-nitronate, N-tetradecyl -alpha-tridecyl-nitrone, N -hexadecyl-alpha-pentadecyl-nitronate, N-octadecyl-a-hep-; adecyl-nitronate, N-hexadecyl-alpha-heptadecyl-nitronate, N-ochatadecyl-alpha-pentadecyl-nitronate , N-heptadecyl-alpha a-hsptadecyl-nitrona, N-octadecyl-alpha-hexadecyl-nitrona, nitrone derived from N, N-di alkyl hydroxylami derived from hydrogenated tallow amine. 7. Benz) furanones and indolinones, for example those described in U.S. Pat. No. 4,325,863; US patent A. No. 4,338,244; U.S. Patent No. 5,175,312; U.S. Patent No. 5,216,052; U.S. Patent Nos. 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, , 7-di-tert-butyl-3- [4- (2-stearoyloxyethoxy) phenyl] -benzofuran-2-one, 3,3 '-bis [5,7-di-tert-butyl-3 - (4 - [2-hydroxyethoxy] phenyl) benzofuran-2 -ona], 5,7-di-tert-butyl-3- (4-ethoxyphenyl) benzofuran-2-one, 3- (4-acetoxy-3,5-dimethylphenyl) ) -5,7-di-tert-butyl-benzofuran-2-one, 3- (3,5-dimethyl-4-pivaloyloxyphenyl) -5,7-di-tert-butyl-benzofuran-2-one, 3- (3,4-dimethylphenyl) -5,7-di-tert-butyl-benzofuran-2-one, 3- (2,3-dimethylphenyl) -5,7-di-tert-butyl-benzofuran-2-one. 8. Tiosynergists, for example dilauryl thiodipropionate or distearyl thiodipropionate. 9. Peroxide scavengers, for example b-thiodipropionic acid esters, for example lauryl, stearyl, myristyl or tridecyl steres, mercaptobenzimidazole or zinc salt of 2-mercaptobenzimidazole, zinc dibutylitiocarbamate, dioctadecyl disulfide, pentaerythritol tetrakis (b) -dodecylmercapto) propionate. 10. Polyamide stabilizers, for example copper salts in combination with iodides and / or phosphorus compounds and salts of divalent manganese. 11. Basic co-stabilizers, for example melamine, polyvinylpyrrolidone, dicyandiamide, triallyl cyanurate, urea derivatives, hydrazine derivatives, amines, polyamides, polyurethanes, alkali metal salts and alkaline earth metal salts of higher fatty acids, for example, calcium stearate , zinc stearate, magnesium behenate, magnesium stearate, sodium ricinoleate, potassium palmitate, antimony pyrocatechol or zinc pyrocatechol. 12. Nucleating agents, for example inorganic substances such as talcum, metal oxides such as titanium dioxide or magnesium oxide, phosphates, carbonates or sulfates, preferably of ferrous alkali metals; organic compounds such as mono- or polycarboxylic acids and their salts, for example 4-tert-butylbenzoic acid, adipic acid, diphenylacetic acid, sodium succinate or sodium benzoate; polymeric compounds such as ionic copolymers (ionomers). 13. Fillers and reinforcing agents, for example calcium carbonate, silicates, glass fibers, glass bulbs, asbestos, talc, kaolin, mica, barium sulfate, metal oxides and hydroxides, carbon black, graphite, sawdust and flours or fibers of other natural products, synthetic fibers. 14. Other additives, for example plasticizers, lubricants, emulsifiers, pigments, dyes, optical brighteners, rheology additives, catalysts, flow control agents, slip agents, entanglement agents, entanglement reinforcements, halogen scavengers, smoke inhibitors, flame retardants, antistatic agents, clarifying agents and blowing agents. The fillers (item 13. in the list) for example are metal hydroxides, especially magnesium hydroxide and aluminum hydroxide. They can be added in a concentration of about 0.01 to about 60 weight percent based on the weight of polyolefin. Blowing agents (item 14. on the list), such as azodicarbonamide, can be used to produce foam instead of solid insulation. The primary antioxidants of component (b), the metal deactivators of component (c) and more optional additives are incorporated into the polyolefin of component (a) by known methods, for example before or after molding or also by applying the stabilizing mixture. dissolved or dispersed to the polyolefin, with or without subsequent evaporation of the solvent. Components (b) and (c) and more optional additives may also be added to the polyolefin in the form of a masterbatch containing these components in a concentration for example from about 2.5 percent to about 25 percent by weight.

The antioxidants of component (b), in total, are used, for example, in the range from about 0.01 weight percent to about 1.5 weight percent based on the weight of the polyolefin (a). Preferably, the compounds of component (b), in total, are employed in the range of about 0.05 weight percent to about 1.0 weight percent, based on the weight of the polyolefin (a). The metal deactivators of component (c), in total, are employed, for example in the range of about 0.1 weight percent to about 2.5 weight percent, based on the weight of the polyolefin (a). Preferably, the compounds of component (c), in total, are employed in the range of about 0.1 weight percent to about 2.0 weight percent based on the weight of the polyolefin (a). The weight ratio of the metal deactivators of component (c) to the antioxidants of component (b) employed in the present invention, for example, is in the range of about 0.5: 1 to about 20: 1. Preferably, the ratio of component (c) to component (b) is in the range of about 1: 1 to about 10: 1.

The following examples illustrate the invention in more detail. They are not intended as a limitation of the invention in any way. Example 1: Stabilization of Polyolefins in Cable Construction with Grease Filler 100 parts of high density polyethylene are dry mixed with 0.4 part of IrganoxMR MD 1024 (1,2-bis (3,5-di-tert-butyl-4) -hydroxyhydrocinnamoyl) hydrazine) and 0.2 part of one of the primary antioxidants listed in Table 1 below. The mixtures are melt formulated in nodules at 230 ° C in a Superior / MPM extruder using a 24: 1 L / D spindle with Maddock mixing head at 60 rpm. The pelleted polyethylene containing the stabilizer mixtures is compression molded at 204 ° C (400 ° F) on films with a thickness of 0.254 mm (0.01 inch) with Mylar backing. The initial oxidation induction time (OIT = Oxidation Induction Time) is measured in these test films. The sample films are then immersed in Witcogel ™, available from Witco, a grease filled with typical hydrocarbon cable used in telecommunications cable. The Witco filling compound contains 0.6% Irganox ™ 1035, thiodiethylene bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate]. The sample films immersed in the filler compound are exposed in an air oven at 70 ° C for 14 days. The samples are then cleaned of the cable filler grease. The "Aged Oxidation Induction Time" is measured in these samples. The OIT test is achieved using a differential scanning calorimeter according to the ASTM D3895 standard test method. The test conditions are: unfolded aluminum tray; without sieve; heating at 200 ° C under nitrogen, followed by a change or commutation to oxygen flow of 100 milliliters / minute. Oxidation induction time (OIT) is the time interval between the start of oxygen flow and the exothermic decomposition of the test specimen. ILO rts in minutes; The longer the ILO is, the more effective it is the stabilizer mix to avoid oxidative degradation. Relative performance of stabilizer mixtures in cable applications with grease fill can be predicted by comparing the initial ILO values and the old ILO values. Table 1 Antioxidant Primary ILO Initial (min) ILO Aged (min) IrganoxMR 1010 77 25 IrganoxMR 1098 161 90 IrganoxMR 3114 91 44 IrganoxMR 3125 126 51 The stabilizer mixtures of IrganoxMR 1098, IrganoxMR 3114, Irganox ™ 3125, each with the deactivator of metal IrganoxMR MD 1024 (1, 2-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine) outperform the performance to a stabilizing mixture of the state of the art of Irganox® 1010 / lrganox® MD 1024 in initial ILO and aged Irganox ™ 1098 is N, N '-hexane-1,6-diylbis- (3- (3,5-di-tert-butyl-4-hydroxyphenylpropionamide)), Irganox ™ 3114 is tris (3,5-di-tert-butyl) -4-hydroxybenzyl) isocyanurate, Irganox ™ 3125 is tris (2 - (3,5-di-tert-butyl-4-hydroxyhydrocinnamoxy) ethyl) isocyanurate. Irganox ™ is a trademark of Ciba Specialty Chemicals Corporation.

Claims (8)

1. CLAIMS 1. A stabilized cable construction, characterized in that it comprises (i) a plurality of insulated electrical conductors having interstices therebetween, the insulation comprises (a) one or more polyolefins, and (b) one or more of the selected primary antioxidants. from the group of N, N'-hexane-1,6-diylbis- (3 - (3,5-di-tert-butyl-4-hydroxyphenylpropionamide)), tris (3,5-di-tert-butyl-4-) hydroxybenzyl) isocyanurate and tris (2- (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy) ethyl) isocyanurate, and (c) one or more metal deactivators selected from alkylhydroxyphenylalkanoyl hydrazines, and (ii) cable filler grease of hydrocarbon inside the interstices, and (iii) a lining surrounding the components (i) and (ii). A cable construction according to claim 1, characterized in that the polyolefins of component (a) are polyethylene or polypropylene or their mixtures. 3. A cable construction according to claim 1, characterized in that the metal deactivators of component (c) are of the formula wherein n is 0 or an integer from 1 to 5; Rx is straight or branched chain alkyl having 1 to 6 carbon atoms; R2 is hydrogen or R-.; and R3 is hydrogen, an alkanoyl having 2 to 18 carbon atoms or a group of the formula where n, R-. and R2 independently have the same definitions as above. 4. A cable construction according to claim 1, characterized in that the metal deactivator of component (c) is 1,2-bis (3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl) hydrazine. 5. A cable construction according to claim 1, characterized in that the antioxidants of component (b), in total are present in the range of about 0.05 weight percent to about 1.0 weight percent, based on the weight of the polyolefin of component (a). 6. A cable construction according to claim 1, characterized in that the metal deactivators of the component (c), in total are present in the range of about 0.1 weight percent to about 2.0 weight percent based on the weight of the polyolefin of component (a). 7. A cable construction according to claim 1, characterized in that the hydrocarbon cable filled grease of component (ii) or one or more of its hydrocarbon constituents are present in the polyolefin of component (a). A cable construction according to claim 1, characterized in that the hydrocarbon cable filled grease of component (ii) or one or more of its hydrocarbon constituents in total is present in the polyolefin of component (a) in the range from about 3 to about 30 weight percent based on the weight of component (a).