Stabilised, transition-metal-containing plastics compositions, moulding compound or moulded part and use of a stabiliser composition for stabilising transition-metal-containing plastics

Abstract

The present invention relates to a method for stabilising transition-metal-containing plastics against oxidative, thermal and / or actinic degradation, in which method at least one sugar alcohol, in combination with at least one phenolic antioxidant, is introduced into a transition-metal-containing plastic. The method is performed in such a way that the resulting plastics composition, with additives introduced, has a total content of transition metals of at least 10 ppm (wt / wt). The present invention also relates to an accordingly produced, stabilised plastics composition, moulding compounds and moulded parts which can be produced from said composition and use of a stabiliser combination made of at least one sugar alcohol and at least one phenolic antioxidant for stabilising transition-metal-containing plastics.

Description

[0001] STABILIZED, TRANSITION METAL-CONTAINING

[0002] PLASTIC COMPOSITIONS, MOULDING COMPOSITION OR MOULDED PART AND USE OF A STABILIZER COMPOSITION FOR STABILIZING TRANSITION METAL-CONTAINING PLASTICS

[0003] The present invention relates to a process for stabilizing transition metal-containing plastics against oxidative, thermal, and / or actinic degradation, in which at least one sugar alcohol in combination with at least one phenolic antioxidant is introduced into a transition metal-containing plastic. The process is conducted such that the resulting additive-containing plastic composition has a total transition metal content of at least 10 ppm (w / w). The present invention also relates to a correspondingly produced, stabilized plastic composition, molding compounds or molded parts producible therefrom, and the use of a stabilizer combination of at least one sugar alcohol and at least one phenolic antioxidant for stabilizing transition metal-containing plastics.

[0004] Organic materials such as plastics are subject to aging processes which ultimately lead to a loss of desired properties such as mechanical characteristics. This process, known as autoxidation, starts from radical chain scission through mechanochemical processes or through UV radiation in the presence of oxygen and leads to changes in the polymer chain, for example in the molecular weight and / or to the formation of new chemical groups. Stabilizers are therefore used to prevent or at least delay this aging. Important stabilizers are antioxidants which interfere with the radicals formed during autoxidation and thus interrupt the degradation process. A general distinction is made between primary antioxidants, which can react directly with oxygen-containing free radicals or C radicals, and secondary antioxidants, which react with intermediately formed hydroperoxides (see C. Kröhnke et al.Antioxidants in Ullmann's encyclopedia of industrial chemistry; Wiley-VCH Verlag, Weinheim 2015). Typical examples of primary antioxidants include phenolic antioxidants, amines, and lactones. Classes of secondary antioxidants include phosphorus compounds such as phosphites and phosphonites, as well as organosulfur compounds such as thioesters, thioethers, and disulfides. In practice, primary and secondary antioxidants are often combined, resulting in a synergistic effect.

[0005] Patent applications WO 2020 / 083740 and WO 2019 / 063550 disclose processes for stabilizing plastics or plastic recyclates, in which alditols can be used as co-stabilizers under certain circumstances. However, the described plastic formulations are not described as containing transition metals.

[0006] US 2003 / 2363250 describes transition metal-containing polymers for agricultural film applications, which may also contain, among other things, hydroxycarboxylic acids such as erythritol acid, arabinolic acid, and mannitol acid. Since these are sugar acids, they are structurally distinct from the alditols of the invention; there is also no mention of a metal-deactivating effect. Furthermore, a polymer-degrading effect is desired, i.e., the opposite of the present invention.

[0007] A challenge in the stabilization of plastics arises from the presence of transition metals in a plastic mixture. Transition metals can catalyze the auto-oxidation process and thus lead to accelerated oxidative damage to a polymer. To prevent or reduce the influence of transition metals, so-called metal deactivators are used in plastic formulations (Z. Osawa, "Role of metals and metal-deactivators in polymer degradation," Polymer Degradation and Stability (1988), 20(3-4), 203-36). These often require a complex synthesis process compared to conventional antioxidants.

[0008] The object of the present invention was therefore to provide an effective stabilization of plastics containing transition metals that is easily accessible and thus particularly cost-effective.

[0009] This problem is solved by the features of the independent patent claims. The respective dependent patent claims represent advantageous developments.

[0010] The present invention relates, in a first aspect, to a process for stabilizing plastics containing at least one transition metal against oxidative, thermal and / or actinic degradation, in which at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) are introduced into the plastic containing at least one transition metal, such that the total content of the transition metals in the resulting plastic composition containing at least one transition metal is at least 10 ppm (w / w). The at least one transition metal is selected from the group consisting of the metals of groups 6, 7, 8, 9, 10 and 11 of the Periodic Table. Surprisingly, it was found that the transition metals contained in the plastic composition can be stabilized by the stabilizer composition used, i.e.The combination of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) leads to significant stabilization. Novel stabilizer compositions and a novel process for stabilizing, in particular, plastics are proposed, which exhibit high effectiveness with transition metal-containing polymers and are particularly cost-effective compared to the prior art.

[0011] Transition metal-containing plastics are understood to mean plastics whose total transition metal content is at least 10 ppm (w / w).

[0012] Preferably, this refers to a minimum concentration of at least 50 ppm (w / w), more preferably at least 100 ppm (w / w). Alternatively or additionally, the total content of the at least one transition metal may be a maximum of 10,000 ppm, preferably a maximum of 5,000 ppm, more preferably a maximum of 2,000 ppm, and particularly preferably a maximum of 1,000 ppm.

[0013] The concentration data of the transition metal content are to be understood as referring to the resulting plastic composition, i.e. the composition which is created by incorporating the stabilizer combination into the plastic containing at least one transition metal.

[0014] In principle, the transition metal can comprise a metal with atomic number 24 (chromium) to atomic number 79 (gold) (with the exception of the transition metals of groups 3, 4, 5, and 12 of the periodic table, which are not included). Preferred transition metals are Cr, Mn, Fe, Co, Ni, Cu, and Mo, with Fe, Co, Ni, Cu, Cr, and Mn being particularly preferred. The plastic contains > 10 ppm, preferably > 50 ppm, and very preferably > 100 ppm of transition metal, preferably in ionic form.

[0015] Furthermore, metals from Group 6 of the Periodic Table are excluded from the definition of at least one transition metal. Not included in the definition of the term "transition metal," metals from the titanium, vanadium, and chromium groups are excluded from the calculation of the total content of transition metals.

[0016] The ionic metal content in polymers can be introduced through contact with metals, e.g., in cables or coatings, but also through additives such as fillers. In particular, the commonly used fillers from natural sources often contain transition metals. Transition metals can also be introduced into polymers through additives such as pigments, which contain, for example, catalyst residues from production.

[0017] According to a preferred embodiment, the at least one sugar alcohol is selected from the group consisting of alditols, cyclitols or mixtures and combinations thereof.

[0018] In particular, the alditols which can be used according to the invention have the following molecular formulas

[0019] HOCH2[CH(OH)] n CH2OH,

[0020] Ri-OCH2[CH(OH)]nCH2OH, or

[0021] HOCH2[CH(OH)]n[CH(ORi)]CH2OH with n = 2-6, preferably n = 3-5, where Ri is an optionally substituted sugar residue.

[0022] Particularly preferably, the alditols are selected from the group consisting of threitol, erythritol, galactitol, mannitol, ribitol, sorbitol, xylitol, arabitol, isomalt, lactitol, maltitol, altritol, iditol, maltotritol and hydrogenated oligo- and polysaccharides with polyol end groups and mixtures thereof, heptitols and octitols, in particular meso-glyceroallo-heptitol, D-glycero-D-altro-heptitol, D-glycero-D-manno-heptitol, meso-glycero-gulo-heptitol, D-glycero-D-galacto-heptitol (perseitol), D-glycero-D-gluco-heptitol, L-glycero-D-gluco-heptitol, D-erythro-L-galacto-octitol and D-threo-L-galacto-octitol, wherein the at least one Alditol is preferably selected from the group consisting of erythritol, mannitol, isomalt, maltitol and mixtures thereof.

[0023] Preferred cyclitols which can be used for the purposes of the present invention are selected from the group consisting of inositol (myo, scyllo-, D-chiro-, L-chiro-, muco-, neo-, allo-, epi- and cis-inositol), 1,2,3,4-tetrahydroxycyclohexane, 1,2,3,4,5-pentahydroxycyclohexane, quercitol, viscumitol, bornesitol, conduritol, ononitol, pinitol, pinpollitol, quebrachitol, ciceritol, quinic acid, shikimic acid and valienol, preferably myo-inositol (myo-inositol).

[0024] The phenolic antioxidant is selected from the group

[0025] Alkylierte Monophenole, wie z.B. 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-methyl- phenol, 2-(a-Methylcyclohexyl)-4,6-dimethylphenol, 2,6-Dioctadecyl-4-methyl- phenol, 2,4, 6-T ricyclohexylphenol, 2,6-Di-tert-butyl-4-methoxymethylphenol, lineare oder verzweigte Nonylphenole, wie z.B. 2,6-Dinonyl-4-methylphenol,

[0026] 2.4-Dimethyl-6-(l'-methylundec-l'-yl)phenol, 2,4-Dimethyl-6-(l'-methylhep- tadec-l'-yl)phenol, 2,4-Dimethyl-6-(l'-methyltridec-l'-yl)phenol und Mischungen hiervon;

[0027] Alkylthiomethylphenole, wie z.B. 2,4-Dioctylthiomethyl-6-tert-butylphenol,

[0028] 2.4-Dioctylthiomethyl-6-methylphenol, 2,4-Dioctylthiomethyl-6-ethylphenol, 2,6-Didodecylthiomethyl-4-nonylphenol;

[0029] Hydroquinones and alkylated hydroquinones, such as 2,6-di-tert-butyl-4-methyloxyphenol, 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-hydroxylphenyl)adipate;

[0030] Tocopherols, such as a-, ß-, y-, 6-tocopherol and mixtures of these (vitamin E) as well as tocopherol acetate

[0031] Hydroxylierte Thiodiphenylether, wie z.B. 2,2'-Thiobis(6-tert-butyl-4-methyl- phenol), 2,2'-Thiobis(4-octylphenol), 4,4'-Thiobis(6-tert-butyl-3-methylphe- nol), 4,4'-Thiobis(6-tert-butyl-2-methylphenol), 4,4'-Thiobis(3,6-di-sec-amyl- phenol), 4,4'-Bis(2,6-dimethyl-4-hydroxyphenyl)disulfid; Alkylidenbisphenole, wie z.B. 2,2'Methylenbis(6-tert-butyl-4-methylphenol), 2,2'-Methylenbis(6-tert butyl-4-ethylphenol), 2,2'-Methylen bis[4-methyl-6- (a-methylcyclohexyl)phenol], 2,2'-Methylenbis(4-methyl-6-cyclohexylphenol}, 2,2'-Methylenbis(6-nonyl-4-methylphenol), 2,2'-Methylenbis(4,6-di-tert-butyl- phenol), 2,2'-Ethylidenbis(4, 6-di-tert-butylphenol), 2,2'-Ethylidenbis(6-tert- butyl-4-isobutylphenol), 2,2'-Methylenbis[6-(a-methylbenzyl)-4-nonylphenol], 2,2'-Methylenbis[6-(a,a-dimethylbenzyl)-4-nonylphenol], 4,4'-Methylenbis- (2, 6-di-tert-butylphenol), 4,4'-Methylenbis(6-tert-butyl-2-methylphenol), 1,1- bis(5-tert-butyl-4-hydroxy-2-methylphenyl)butan, 2,6-Bis(3-tert-butyl-5-me- thyl-2-hydroxybenzyl)-4-methylphenol, l,l,3-Tris(5-tert-butyl-4-hydroxy-2- methylphenyl)butan, l,l-Bis(5-tert-butyl-4-hydroxy-2-methylphenyl)-3-n-do- decylmercaptobutan, Ethylenglycol-bis[3,3-bis(3'-tert-butyl-4'-hydroxyphe- nyl)butyrat], Bis(3-tert-butyl-4-hydroxy-5-methylphenyl)-dicyclopentadien, Bis[2-(3'-tert-butyl-2'-hydroxy-5'-methylbenzyl)-6-tert-butyl-4-methylphenyl]- terephthalat, l,l-Bis-(3,5-dimethyl-2-hydroxyphenyl)butan, 2,2-Bis(3,5-di- tert-butyl-4-hydroxyphenyl)propan, 2,2-Bis-(5-tert-butyl-4-hydroxy-2-methyl- phenyl)-4-n-dodecy-lmercaptobutan, l,l,5,5-Tetra(5-tert-butyl-4-hydroxy-2- methylphenyl)pentan;,

[0032] 0-, N- und S-Benzyl-Verbindungen, wie z.B. 3,5,3',5'-Tetra-tert-butyl- 4,4'-dihydroxydibenzylether, Octadecyl-4-hydroxy-3,5-dimethylbenzyl-mer- captoacetat, Tridecyl-4-hydroxy-3,5-di-tert-butylbenzylmercaptoacetat, Tris- (3,5-di-tert-butyl-4-hydroxybenzyl)amin, Bis(4-tert-butyl-3-hydroxy-2,6-dime- thylbenzyl)dithioterephthalat, Bis(3,5-di-tert-butyl-4-hydroxy-benzyl)sulfid, lsooctyl-3,5-di-tert-butyl-4-hydroxybenzylmercaptoacetat;

[0033] Hydroxybenzylierte Malonate, wie z.B. Dioctadecyl-2, 2-bis(3, 5-di-tert-butyl-2- hydroxybenzyl)malonat, Dioctadecyl-2-(3-tert-butyl-4-hydroxy-5-methyl- benzyl)malonat, Didodecylmercaptoethyl-2,2-bis(3,5-di-tert-butyl-4-hydroxy- benzyl)malonat, Bis[4-(l,l,3,3-tetramethylbutyl)phenyl]-2, 2-bis(3,5-di-tert- butyl-4-hydroxybenzyl)malonat;

[0034] Aromatische Hydroxybenzylverbindungen, wie z.B. l,3,5-Tris(3,5-di-tert-butyl- 4-hydroxybenzyl)-2,4,6-trimethylbenzol, l,4-Bis(3,5-di-tert-butyl-4-hydroxy- benzyl)-2,3,5,6-tetramethylbenzol, 2,4,6-Tris(3,5-di-tert-butyl-4-hydroxy- benzyl)phenol; Triazinverbindungen, wie z.B. 2,4-Bis(octylmercapto)-6-(3,5-di-tert-butyl-4- hydroxyanilino)-l,3,5-triazin, 2-Octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hyd- roxyanilino)-l,3,5-triazin, 2-Octylmercapto-4,6-bis(3,5-di-tert-butyl-4-hydroxy- phenoxy)-l,3,5-triazin, 2,4,6-Tris(3,5-di-tert-butyl-4-hydroxyphenoxy)-l,2,3- triazin, l,3,5-Tris(3,5-di-tert-butyl-4-hydroxybenzyl)isocyanurat, 1,3,5-Tris(4- tert-butyl-3-hydroxy-2,6-dimethylbenzyl)isocyanurat, 2,4,6-Tris(3,5-di-tert- butyl-4-hydroxphenylethyl)-l,3,5-triazin, l,3,5-Tris(3,5-di-tert-butyl-4-hydroy- phenylpropionyl)hexahydro-l,3,5-triazin, l,3,5-Tris(3,5-dicyclohexyl-4-hydro- xybenzyl)isocyanurat;

[0035] Benzylphosphonate, wie z.B. Dimethyl-2,5-di-tert-butyl-4-hydroxybenzylphos- phonat, Diethyhl-3,5-di-tert-butyl-4-hydroxybenzylphosphonat, Dioctadecyl- 3, 5-di-tert-butyl-4-hydroxybenzylphosphonat, Dioctadecyl-5-tert-butyl-4-hyd- roxy-3-methylbenzylphosphonat, das Calciumsalz des Monoethylesters der 3,5-Di-tert-butyl-4-hydroxybenzylphosphonsäure;

[0036] Acylaminophenole, wie z.B. 4-Hydroxylauranilid, 4-Hydroxystearanilid, Octyl-N- (3,5-di-tert- butyl-4-hydroxyphenyl)carbamat;

[0037] Ester der ß-(3,5-Di-tert-butyl-4-hydroxyphenyl)propionsäure mit ein- oder mehrwertigen Alkoholen, z.B. Methanol, Ethanol, n-Octanol, i-Octanol, Octade- canol, 1,6-Hexandiol, 1,9-Nonandiol, Ethylenglycol, 1,2-Propandiol, Neopentylglycol, Thiodiethylenglycol, Diethylenglycol, Triethylenglycol, Pentaerythri- tol, Tris(hydroxyethyl)isocyanurat, N,N'-Bis(hydroxyethyl)oxamid, 3-Thiaunde- canol, 3-Thiapentadecanol, Trimethylhexandiol, Trimethylolpropan, 4-Hydro- xymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octan;

[0038] Ester der ß-(5-tert-Butyl-4-hydroxy-3-methylphenyl)propionsäure mit ein- oder mehrwertigen Alkoholen, z.B. Methanol, Ethanol, n-Octanol, i-Octanol, Octade- canol, 1,6-Hexandiol, 1,9-Nonandiol, Ethylenglycol, 1,2-Propandiol, Neopentylglycol, Thiodiethylenglycol, Diethylenglycol, Triethylenglycol, Pentaerythri- tol, Tris(hydroxyethyl)isocyanurat, N,N'-bis(hydroxyethyl)oxamid, 3-Thiaunde- canol, 3-Thiapentadecanol, Trimethylhexandiol, Trimethylolpropan, 4Hydroxy- methyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octan, 3,9-Bis[2-{3-(3-tert-butyl-4- hydroxy-5-methylphenyl)propionyloxy}-l,l-dimethylethyl]-2,4,8,10-tetraoxa- spiro[5.5]undecan;

[0039] Ester der ß-(3,5-Dicyclohexyl-4-hydroxyphenyl)propionsäure mit ein- oder mehrwertigen Alkoholen, z.B. Methanol, Ethanol, Octanol, Octadecanol, 1,6- Hexandiol, 1,9-Nonandiol, Ethylenglycol, 1,2-Propandiol, Neopentylglycol, Thiodiethylenglycol, Diethylenglycol, Triethylenglycol, Pentaerythritol, Tris(hydroxyethyl)isocyanurat, N,N'-bis(hydroxyethyl)oxamid, 3-Thiaundecanol , 3-Thiapentadecanol, Trimethylhexandiol, Trimethylolpropan, 4- Hydroxyme- thyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octan;

[0040] Esters of (3,5-di-tert-butyl-4-hydroxyphenyl)acetic acid with mono- or polyhydric alcohols, e.g. methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, Pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane;

[0041] Amides of ß-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid, such as N,N'-bis(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hexamethylenediamide, N,N'-bis-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hexamethylenediamide, N,N'-bis-(3,5-di-tert-butyl-4-hydroxyphenylpropionyl)hexamethylenediamide, 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, distributed by Uniroyal);

[0042] Ascorbic acid (vitamin C).

[0043] Particularly preferred phenolic antioxidants are the following structures:

[0044] Other particularly preferred phenolic antioxidants are based on renewable raw materials such as tocopherols (vitamin E), tocotrienols, tocopherols, carotenoids, hydroxytyrosol, flavonols such as chrysin, quercetin, hesperidin, neohesperidin, naringin, morin, kaempferol, fisetin, anthocyanins such as delphinidin and malvidin, curcumin, carnosic acid, carnosol, rosmarinic acid, resveratroluride tannins.

[0045] According to a further preferred embodiment, component (A) and component (B) are introduced into the plastic containing at least one transition metal in a weight ratio of 90:10 to 10:90, preferably of 80:20 to 20:80, particularly preferably of 70:30 to 30:70.

[0046] The introduction of components (A) and (B) into the plastic containing at least one transition metal can be carried out, for example, by mixing components (A) and (B) in solid or liquid form with the plastic containing at least one transition metal in solid form and melting the resulting mixture and then cooling it, or by melting components (A) and (B) in solid or liquid form and introducing the resulting melt into a melt of the plastic containing at least one transition metal.

[0047] In this case, it is preferred if, based on 95.0 to 99.99 parts by weight, preferably 99.0 to 99.98 parts by weight of the plastic containing at least one transition metal, 0.01 to 5.0 parts by weight, preferably 0.02 to 1.0 part by weight of the at least one sugar alcohol (component (A)) are introduced.

[0048] It is particularly advantageous if, based on 91 to 99.94 parts by weight, preferably 98.5 to 99.91 parts by weight of the plastic containing at least one transition metal

[0049] (A) 0.02 to 3 parts by weight, preferably 0.03 to 0.5 parts by weight of at least one sugar alcohol, and

[0050] (B) 0.04 to 6 parts by weight, preferably 0.06 to 1 part by weight of the at least one phenolic antioxidant are introduced.

[0051] The plastic containing at least one transition metal can be selected from the group consisting of a) polymers of olefins or diolefins, such as polyethylene, in particular LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methylpentene-1, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers, as well as corresponding copolymers in the form of statistical or block structures such as polypropylene-polyethylene (EP), EPM or EPDM, ethylene-vinyl acetate (EVA), ethylene-acrylic esters, such as ethylene-butyl acrylate, ethylene-acrylic acid-glycidyl acrylate, and corresponding graft polymers such as polypropylene-g-maleic anhydride, polypropylene-g-acrylic acid and polyethylene-g-acrylic acid, polyethylene-polybutyl acrylate-graft-maleic anhydride as well as blends such as LDPE / LLDPE or long-chain branched polypropylene copolymers produced with alpha-olefins as comonomers such aswith 1-butene, 1-hexene, 1-octene or 1-octadecene, b) polystyrene, polymethylstyrene, polyvinylnaphthalene, styrene-butadiene (SB), styrene-butadiene-styrene (SBS), styrene-ethylene-butylene-styrene (SEBS), styrene-ethylene-propylene-styrene, styrene-isoprene, styrene-isoprene-styrene (SIS), styrene-butadiene-acrylonitrile (ABS), styrene-acrylonitrile-acrylate (ASA), styrene-ethylene, styrene-maleic anhydride polymers including corresponding graft copolymers such as styrene on butadiene, maleic anhydride on SBS or SEBS, as well as graft copolymers of methyl methacrylate, styrene-butadiene and ABS (MABS), as well as hydrogenated Polystyrene derivatives such as polyvinylcyclohexane, c) halogen-containing polymers such as polyvinyl chloride (PVC), polychloroprene and polyvinylidene chloride (PVDC), copolymers of vinyl chloride and vinylidene chloride or of vinyl chloride and vinyl acetate, chlorinated polyethylene, polyvinylidene fluoride, epichlorohydrin homo and copolymers in particular.with ethylene oxide (ECO), d) polymers of unsaturated esters such as polyacrylates and polymethacrylates such as polymethyl methacrylate (PMMA), polybutyl acrylate, polylauryl acrylate, polystearyl acrylate, polyglycidyl acrylate, polyglycidyl methacrylate, polyacrylonitrile, polyacrylamides, copolymers such as polyacrylonitrile-polyalkyl acrylate, e) polymers of unsaturated alcohols and derivatives, such as polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyallyl phthalate, polyallyl melamine, f) polyacetals, such as polyoxymethylene (POM), and corresponding copolymers, such as copolymers with butanal, g) polyphenylene oxides and blends of these with polystyrene or polyamides, h) polymers of cyclic ethers such as polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, Polytetrahydrofuran, i) polyurethanes, from hydroxy-terminated polyethers or polyesters and aromatic or aliphatic isocyanates such as2,4- or 2,6-toluene diisocyanate or methylenediphenyl diisocyanate, in particular also linear polyurethanes PU), polyureas, j) polyamides such as polyamide 6, 6.6, 6.10, 4.6, 4.10, 6.12, 10.10, 10.12, 12.12, polyamide 11, polyamide 12 and (semi-)aromatic polyamides such as polyphthalamides, e.g. made from terephthalic acid and / or isophthalic acid and aliphatic diamines such as. B. hexamethylenediamine or m-xylylenediamine or from aliphatic dicarboxylic acids such as adipic acid or sebacic acid and aromatic diamines such as 1,4- or 1,3-diaminobenzene, blends of different polyamides such as PA-6 and PA 6.6 or blends of polyamides and polyolefins such asPA / PP, k) polyimides, polyamide-imides, polyetherimides, polyesterimides, poly(ether)ketones, polysulfones, polyethersulfones, polyarylsulfones, polyphenylene sulfide, polybenzimidazoles, polyhydantoins, l) polyesters made from aliphatic or aromatic dicarboxylic acids and diols or from hydroxycarboxylic acids such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene terephthalate, polyethylene naphthylate, poly-l,4-dimethylocyclohexane terephthalate, polyhydroxybenzoate, polyhydroxynaphthalate, polylactic acid, polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyethylene succinate, polytetramethylene succinate, polycaprolactone, m) polycarbonates, polyester carbonates, and blends of these such as PC / ABS, PC / PBT, PC / PET / PBT, PC / PA n) cellulose derivatives, such as cellulose nitrate, cellulose acetate, cellulose propionate, cellulose butyrate, o) epoxy resins consisting of di- or polyfunctional epoxy compounds in combination with e.g.Hardeners based on amines, anhydrides, dicyandiamide, mercaptans, isocyanates or catalytically active hardeners, p) phenolic resins such as phenol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, q) unsaturated polyester resins made from unsaturated dicarboxylic acids and diols with vinyl compounds, e.g. styrene, alkyd resins, r) silicones, e.g. based on dimethylsiloxanes, methylphenylsiloxanes or diphenylsiloxanes, e.g. vinyl group-terminated, s) and mixtures, combinations or blends of two or more of the aforementioned polymers.

[0052] If the polymers listed under a) to r) are copolymers, they may be in the form of random, block, or tapered structures. Furthermore, the polymers mentioned may be in the form of linear, branched, star-shaped, or hyperbranched structures.

[0053] The plastic containing at least one transition metal is particularly preferably a polymer made of olefins or diolefins, very particularly preferably polyethylenes or polypropylenes, for example.

[0054] If the polymers listed under a) to r) are stereoregular polymers, they can be present in the form of isotactic, stereotactic, but also atactic forms or as stereoblock copolymers.

[0055] Furthermore, the polymers listed under a) to r) can have both amorphous and (partially) crystalline morphologies.

[0056] If necessary, the polyolefins mentioned under a) can also be cross-linked, e.g. cross-linked polyethylene, which is then referred to as X-PE.

[0057] Furthermore, the present compounds can be used to stabilize rubbers and elastomers. These can be natural rubber (NR) or synthetic rubber materials. Suitable synthetic rubber materials include, in particular, butadiene (BR), styrene-butadiene (SBR), chloroprene (CR), isoprene (IR), isobutylene-isoprene, and acrylonitrile-butadiene (NBR or, in hydrogenated form, HNBR). Other suitable rubbers and elastomers are ethylene-propylene-diene terpolymers (EPDM) and ethylene-propylene copolymers (EPM), polyester-urethanes (AU), polyether-urethanes (EU), and silicones (MQ).

[0058] In addition to new materials, the plastics can also be recycled plastics, e.g. from industrial collections such as production waste, or plastics from household or recyclables collections.

[0059] It is also possible that during the process, at least one further additive selected from the group consisting of amine antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amines as light (HALS) and long-term heat stabilizers (HAS), conventional metal deactivators, filler deactivators, antiozonants, nucleating agents, antinucleating agents, transparency improvers (clarifiers), impact strength improvers, plasticizers, lubricants, rheology or viscosity modifiers, thixotropic agents, chain extenders, processing aids, mold release agents, flame retardants, pigments, dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, antiblocking agents, coupling agents, crosslinking agents, anticrosslinking agents, hydrophilizing agents,Hydrophobic agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, acetaldehyde and formaldehyde scavengers, blowing agents, degradation additives (prodegradants), defoaming agents, odor scavengers and odor-improving substances, PVC heat stabilizers, marking agents, antifogging agents, gloss improvers, matting agents, additives to increase electrical and / or thermal conductivity, repellants, fillers and reinforcing materials and mixtures thereof.

[0060] In a further preferred embodiment, the compositions contain secondary antioxidants, in particular phosphites / phosphonites, acid scavengers, co-stabilizers and / or light stabilizers from the group of hindered amines (HALS).

[0061] The present invention further relates to a plastic composition containing or consisting of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)), at least one plastic containing a transition metal selected from the group consisting of the metals of groups 6, 7, 8, 9, 10 and 11 of the Periodic Table, wherein the total content of the transition metals in the plastic composition is at least 10 ppm (w / w).

[0062] The preferred embodiments described above with regard to the process, in particular the quantity and quality of the respective components, also apply without restriction for the purposes of defining the plastic composition according to the invention.

[0063] According to a preferred embodiment, the plastic composition contains or consists of 0.02 to 3.0 parts by weight, preferably 0.03 to 0.5 parts by weight of the at least one sugar alcohol (component (A)), 0.02 to 3.0 parts by weight, preferably 0.03 to 0.5 parts by weight of the at least one phenolic antioxidant (component (B)), and 94.0 to 99.96 parts by weight, preferably 99.0 to 99.94 parts by weight of the at least one plastic containing a transition metal. The plastic composition may also contain at least one further additive selected from the group consisting of aminic antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amines as light (HALS) and long-term heat stabilizers (HAS), conventional metal deactivators, filler deactivators, antiozonants, nucleating agents, antinucleating agents, transparency improvers (clarifiers),Impact modifiers, plasticizers, lubricants, rheology or viscosity modifiers, thixotropic agents, chain extenders, processing aids, mold release agents, flame retardants, pigments, dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, antiblocking agents, coupling agents, crosslinking agents, anti-crosslinking agents, hydrophilizing agents, hydrophobizing agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, acetaldehyde and formaldehyde scavengers, blowing agents, degradation additives (prodegradants), defoaming agents, odor scavengers and odor-improving substances, PVC heat stabilizers, marking agents, antifogging agents, gloss improvers, matting agents, additives to increase electrical and / or thermal conductivity, repellants, fillers and reinforcing materials and Mixtures thereof.,

[0064] The invention also relates to a molding compound or a molded part, which can be produced from a plastic composition according to the invention as described above. Molded parts are in particular selected from molded parts produced by injection molding, for example bottles, containers, screw-top jars, boxes, barrels, buckets, pallets, technical parts for cars and transport such as bumpers, trim parts, handles, headlight covers, fittings and functional parts, electrical and electronic applications such as housing parts and accessories for televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, plug connections, storage media, household, leisure and sporting articles such as flower pots, coat hangers, toy figures, model making, components for furniture such asClamps and clips, parts produced by blow molding, in particular hollow bodies such as bottles, fuel tanks, canisters, washing water tanks and expansion tanks, parts produced by rotational molding, in particular tanks such as heating oil and rainwater tanks, housings for machines, transport containers, leisure and water sports items such as kayaks, parts produced by calendering, in particular films such as decorative films, wallpapers and floor coverings, parts produced by additive manufacturing processes, for example by binder jetting (BJ), laser sintering (LS), selective laser melting (SLM), electron beam melting (EBM), fused deposition modeling (FDM), fused filament fabrication (FFF), multi-jet modeling (MJM), poly-jet modeling (PJM), layer laminated manufacturing (LLM), thermal transfer sintering (TTS), digital light processing (DLP), photopolymer jetting (PJ) and stereolithography (SL).

[0065] The present invention is particularly suitable for stabilising plastics in the form of injection moulded parts, foils or films, foams, fibres, cables and pipes, profiles, hollow bodies, tapes, membranes such as geomembranes, or adhesives which are produced by extrusion, injection moulding, blow moulding, calendering, pressing processes, spinning processes, rotomoulding, e.g.

[0066] • for packaging e.g. for food, detergents, cosmetics, adhesives in the form of films, bottles, bags, screw jars

[0067] • Storage and transport containers such as boxes, crates, barrels, buckets, pallets

[0068] • Automotive, railway, aircraft, ship and machine parts such as bumpers, trim parts, fittings and functional parts, upholstery

[0069] • Construction applications such as profiles, construction foils, cable ducts, house cladding, noise barriers, drainage channels, professional boards, floor coverings

[0070] • Road and landscaping applications such as beacon bases, posts, barriers, geotextiles,

[0071] • Electrical and electronic applications such as housing parts and accessories for televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, connectors, storage media

[0072] • Cable insulation

[0073] • Pipes for e.g. water, gas, sewage, irrigation, drainage pipes Hygiene items such as diapers

[0074] • Furniture and textile applications, such as curtains and upholstery, worktops • Household, leisure and sporting goods such as balls, tennis rackets, skis, flower pots, rain barrels, coat hangers

[0075] • Agricultural applications such as mulch, tunnel or perforated films, plant pots

[0076] • Pharmaceutical and crop protection applications such as encapsulation of active ingredients and biologically active substances

[0077] • In medical technology for the production of suture material, dressing material, orthoses and prostheses.

[0078] Furthermore, the present invention relates to the use of at least one sugar alcohol (component (A)) in combination with at least one phenolic antioxidant (component (B)) for stabilizing plastics containing at least one transition metal against oxidative, thermal and / or actinic degradation, wherein the at least one sugar alcohol (component (A)) and the at least one phenolic antioxidant (component (B)) are added to the plastic containing at least one transition metal selected from the group consisting of the metals of groups 6, 7, 8, 9, 10 and 11 of the Periodic Table, such that the total content of the transition metals in the resulting plastic composition is at least 10 ppm (w / w).

[0079] The present invention can be achieved, for example, by means of an additive composition consisting of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)). This additive composition, which can be in the form of a powder, liquid, oil, compacted, on a carrier material, as granules, solution, or flakes, is mixed with the polymer to be stabilized, the polymer matrix is ​​converted into the melt, and the mixture is subsequently cooled. Alternatively, it is also possible to introduce the additive into a polymer melt in a molten state.

[0080] In the event that further components are added to the polymer composition, these can be added to the polymers separately, in the form of liquids, powders, granules or compacted products or together with the additive composition according to the invention as described above.

[0081] The above-described additive composition and any additional additives are incorporated into the plastic using conventional processing methods, preferably using mixers, kneaders, or extruders. Preferred processing machines are extruders such as single-screw extruders, twin-screw extruders, planetary roller extruders, ring extruders, and co-kneaders, preferably equipped with vacuum degassing. Processing can take place under air or, if necessary, under inert gas conditions.

[0082] The processing of the plastic compositions containing the described additive composition can be carried out by conventional plastic processing methods in continuous and discontinuous processes, such as by extrusion, calendering, blow molding, pultrusion, injection molding, pressing, transfer molding, casting, blow molding, rotational molding, deep drawing, sintering, foaming or also by additive manufacturing processes for the production of granules, molded parts, semi-finished products, fibers and films.

[0083] Suitable extruders are piston extruders and screw extruders, single-screw extruders, twin-screw extruders, multi-screw extruders, planetary roller extruders, especially for the production of plastic granules, pipes, rods, hoses, profiles, sheathing, sheets, films, V-belts, timing belts, seals, foam sheets (XPS), fibers and filaments for additive manufacturing processes.

[0084] Suitable injection molding machines can be hydraulic or electromechanical and include multi-component injection molding and in-mold processes.

[0085] Examples of parts produced by injection molding include bottles, containers, screw-top jars, boxes, barrels, buckets, pallets, technical parts for cars and transport such as bumpers, trim parts, handles, headlight covers, fittings and functional parts, electrical and electronic applications such as housing parts and accessories for televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, connectors, storage media, household, leisure and sporting items such as flower pots, coat hangers, toy figures, model making, and furniture components such as clamps and clips.

[0086] Parts produced by blow molding are in particular hollow bodies such as bottles, fuel tanks, canisters, washer fluid tanks and expansion tanks.

[0087] Parts manufactured by rotational molding include, in particular, tanks such as heating oil and rainwater tanks, housings for machines, transport containers, leisure and water sports items such as kayaks.

[0088] Calendering is used in particular to produce films such as decorative films, wallpapers and floor coverings.

[0089] Furthermore, the additive compositions according to the invention can be prepared and introduced in the form of so-called masterbatches or concentrates which contain, for example, 10-90% of the compositions according to the invention in a polymer or a polymer recyclate.

[0090] The present invention is explained in more detail with reference to the following exemplary embodiments, without limiting the invention thereto.

[0091] Examples of implementation:

[0092] To test the effectiveness of the stabilizers according to the invention, a commercially available polypropylene (Moplen HP 500N, Lyondell Basell Industries) was homogenized in a powder-powder mixture with the stabilizers according to the invention and circulated in a twin-screw microextruder (MC 5, manufacturer DSM) for 30 minutes at 200 °C and 90 revolutions per minute, and the decrease in force was recorded. Force is a direct measure of the molecular weight of polypropylene; the lower the decrease, the greater the stabilizing effect.

[0093]

[0094] AO-1: Pentaerythritol tetrakis[3-[3,5-di-tert-butyl-4-hydroxyphenyl] propionate

[0095] AO-2: Ethylene-1,2-bis(3,3-[3-tert-butyl-4-hydroxyphenyl]butyrate (Hostanox 03, Clariant SE)

[0096] AO-3: l,3,5-trimethyl-2,4,5-tris(3',5'-di-tert-butyl)-4'-hydroxybenzyl)benzene (I r-ganox 1330, BASF SE) AO-4: 2',3-bis[[3-[3,5-di-tert-butyl-4-hydroxyphenyl]propionyl]]proponiohydrazine (Irganox MD 1024, BASF SE)

[0097] The addition of transition metals leads to a significant deterioration of the stability of polypropylene (Comparative Examples 2-7); with the additives according to the invention, no degradation of the polypropylene is observed even after 30 minutes, ie there is an excellent stabilizing effect.

Claims

Claims: A method for stabilizing plastics containing at least one transition metal against oxidative, thermal, and / or actinic degradation, in which at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) are incorporated into the plastic containing at least one transition metal selected from the group consisting of the metals of groups 6, 7, 8, 9, 10, and 11 of the periodic table, such that the total content of the transition metals in the resulting plastic composition is at least 10 ppm (wt / wt). The method according to claim 1, characterized in that the total content of the transition metals in the resulting plastic composition is at least 50 ppm (wt / wt), preferably at least 100 ppm (wt / wt), and / or a maximum of 10,000 ppm, preferably a maximum of 5,000 ppm, more preferably a maximum of 2,000 ppm, and particularly preferably a maximum of 1,000 ppm.A method according to any one of the preceding claims, characterized in that the at least one transition metal is selected from the group consisting of Fe, Co, Ni, Cu, Cr, Mn and mixtures thereof. A method according to any one of the preceding claims, characterized in that metals of groups 4, 5 and 6 of the periodic table are excluded from the definition of the at least one transition metal. A method according to one of the preceding claims, characterized in that the at least one sugar alcohol is selected from the group consisting of Alditols Cyclitols, as well as mixtures and combinations thereof. A process according to the preceding claim, characterized in that the alditol has the molecular formula HOCH2[CH(OH)] n CH2OH, Ri-OCH2[CH(OH)] n CH2OH, or HOCH2[CH(OH)] n[CH(ORi)]CH2OH with n = 2-6, preferably n = 3-5, where Ri is an optionally substituted sugar residue. A method according to one of the two preceding claims, characterized in that the alditol is selected from the group consisting of threitol, erythritol, galactitol, mannitol, ribitol, sorbitol, xylitol, arabitol, isomalt, lactitol, maltitol, altritol, iditol, maltotritol and hydrogenated oligo- and polysaccharides with polyol end groups and mixtures thereof, heptitols and octitols, in particular meso-glyceroallo-heptitol, D-glycero-D-altro-heptitol, D-glycero-D-manno-heptitol, meso-glycero-gulo-heptitol, D-glycero-D-galacto-heptitol (perseitol), D-glycero-D-gluco-heptitol, L-glycero-D-gluco-heptitol, D-erythro-L-galacto-octitol and D-threo-L-galacto-octitol, wherein the at least one alditol is preferably selected from the group consisting of erythritol, mannitol, isomalt, maltitol and mixtures thereof.Method according to any one of claims 5 to 7, characterized in that the at least one cyclitol is selected from the group consisting of inositol (myo, scyllo-, D-chiro-, L-chiro-, muco-, neo-, allo-, epi- and cis-inositol), 1,2,3,4-tetrahydroxycyclohexane, 1,2,3,4,5-pentahydroxycyclohexane, quercitol, viscumitol, bornesitol, conduritol, ononitol. Pinitol, pinpollitol, quebrachitol, ciceritol, quinic acid, shikimic acid and valienol, preferably myo-lnositol.

9. Method according to one of the preceding claims, characterized in that the component (A) and the component (B) are introduced into the plastic containing at least one transition metal in a weight ratio of 90:10 to 10:90, preferably of 80:20 to 20:80, particularly preferably of 70:30 to 30:

70.

10. Method according to one of the preceding claims, characterized in that the components (A) and (B) are introduced into the plastic containing at least one transition metal by mixing the components (A) and (B), which are present as solids or liquids, with the plastic containing at least one transition metal, which is present as solids, and melting and subsequently cooling the resulting mixture, or by melting the components (A) and (B), which are present as solids or liquids, and introducing the resulting melt into a melt of the plastic containing at least one transition metal.

11. Method according to one of the preceding claims, characterized in that, with reference to 95.0 to 99.99 wt. parts, preferably 99.0 to 99.98 wt. parts of the plastic containing at least one transition metal, 0.01 to 5.0 wt. parts, preferably 0.02 to 1.0 wt. parts of the at least one sugar alcohol (component (A)) are introduced.

12. Method according to one of the preceding claims, characterized in that, with reference to 91 to 99.94 parts by weight, preferably 98.5 to 99.91 parts by weight of the plastic containing at least one transition metal (A) 0.02 to 3 parts by weight, preferably 0.03 to 0.5 parts by weight of the at least one sugar alcohol, and (B) 0.04 to 6 parts by weight, preferably 0.06 to 1 parts by weight of the at least one phenolic antioxidant are incorporated. A method according to one of the preceding claims, characterized in that the plastic containing at least one transition metal is selected from the group consisting of a) polymers of olefins or diolefins, such as polyethylene, in particular LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methylpentene-1, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers, and corresponding copolymers in the form of statistical or block structures such as polypropylene-polyethylene (EP), EPM or EPDM, ethylene-vinyl acetate (EVA), ethylene acrylates, such as ethylene-butyl acrylate, ethylene-acrylic acid-glycidyl acrylate, and corresponding graft polymers such asPolypropylene-g-maleic anhydride, polypropylene-g-acrylic acid and polyethylene-g-acrylic acid, b) polystyrene, polymethylstyrene, polyvinylnaphthalene, styrene-butadiene (SB), styrene-butadiene-styrene (SBS), styrene-ethylene-butylene-styrene (SEBS), styrene-ethylene-propylene-styrene, styrene-isoprene, styrene-isoprene-styrene (SIS), styrene-butadiene-acrylonitrile (ABS), styrene-acrylonitrile acrylate (ASA), styrene-ethylene, styrene-maleic anhydride polymers including corresponding graft copolymers such as styrene on butadiene, maleic anhydride on SBS or SEBS, as well as graft copolymers of methyl methacrylate, styrene-butadiene and ABS (MABS), c) halogen-containing Polymers such as polyvinyl chloride (PVC), polychloroprene and polyvinylidene chloride (PVDC), copolymers of vinyl chloride and vinylidene chloride or of vinyl chloride and vinyl acetate, chlorinated polyethylene, polyvinylidene fluoride, epichlorohydrin homo and copolymers especially with ethylene oxide (ECO). d) Polymers of unsaturated esters such as polyacrylates and polymethacrylates, such as polymethyl methacrylate (PMMA), polybutyl acrylate, polylauryl acrylate, polystearyl acrylate, polyglycidyl acrylate, polyglycidyl methacrylate, polyacrylonitrile, polyacrylamides, copolymers such as polyacrylonitrile-polyalkyl acrylate; e) Polymers of unsaturated alcohols and derivatives, such as polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyallyl phthalate, polyallyl melamine; f) Polyacetals, such as polyoxymethylene (POM), and corresponding copolymers, such as copolymers with butanal; g) Polyphenylene oxides and blends thereof with polystyrene or polyamides; h) Polymers of cyclic ethers such as polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, polytetrahydrofuran; i) Polyurethanes, of hydroxy-terminated Polyethers or polyesters and aromatic or aliphatic isocyanates such as e.g.2,4- or 2,6-toluene diisocyanate or methylenediphenyl diisocyanate, in particular also linear polyurethanes (PU), polyureas, j) polyamides such as polyamide 6, 6.6, 6.10, 4.6, 4.10, 6.12, 10.10, 10.12, 12.12, polyamide 11, polyamide 12, and (partially) aromatic polyamides such as polyphthalamides, e.g., produced from terephthalic acid and / or isophthalic acid and aliphatic diamines such as e.g. B. Hexamethylenediamine or m-xylylenediamine or from aliphatic dicarboxylic acids such as adipic acid or sebacic acid and aromatic diamines such as 1,4- or 1,3-diaminobenzene, blends of different polyamides such as PA-6 and PA 6.6 or blends of polyamides and polyolefins such as PA / PP, k) polyimides, polyamide-imides, polyetherimides, polyesterimides, poly(ether)ketones, polysulfones, polyethersulfones, polyarylsulfones, polyphenylene sulfide, polybenzimidazoles, polyhydantoins. l) Polyesters made from aliphatic or aromatic dicarboxylic acids and diols or from hydroxycarboxylic acids such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polypropylene terephthalate, polyethylene naphthylate, poly-1,4-dimethylocyclohexane terephthalate, polyhydroxybenzoate, polyhydroxynaphthalate, polylactic acid, polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyethylene succinate, polytetramethylene succinate, polycaprolactone; m) Polycarbonates, polyester carbonates, and blends thereof such as PC / ABS, PC / PBT, PC / PET / PBT, PC / PA; n) Cellulose derivatives, such as cellulose nitrate, cellulose acetate, cellulose propionate, cellulose butyrate; o) Epoxy resins consisting of di- or polyfunctional epoxy compounds in combination with, for example, B. Hardeners based on amines, anhydrides, dicyandiamide, mercaptans, isocyanates or catalytically acting hardeners, p) Phenolic resins such as e.g.Phenol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, q) unsaturated polyester resins made from unsaturated dicarboxylic acids and diols with vinyl compounds, e.g., styrene, alkyd resins, r) silicones, e.g., based on dimethylsiloxanes, methylphenylsiloxanes, or diphenylsiloxanes, e.g., vinyl-terminated groups, s) as well as mixtures, combinations, or blends of two or more of the aforementioned polymers. A process according to one of the preceding claims, characterized in that the polymer containing at least one transition metal comprises at least one further additive selected from the group consisting of amine antioxidants, secondary antioxidants, in particular phosphites, phosphonites, or thioethers, UV absorbers, and light stabilizers, in particular hindered amines. as light (HALS) and long-term heat stabilizers (HAS), metal deactivators, filler deactivators, antiozonants, nucleating agents, antinucleating agents, transparency enhancers (clarifiers), impact enhancers, plasticizers, lubricants, rheology or viscosity modifiers, thixotropic agents, chain extenders, processing aids, demolding aids, flame retardants, pigments, dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, antiblocking agents, coupling agents, crosslinking agents, anticrosslinking agents, hydrophilizing agents, hydrophobizing agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, acetaldehyde and formaldehyde scavengers, blowing agents, degradation additives (prodegradants), defoaming agents, odor neutralizers and odor-improving substances, PVC heat stabilizers, marking agents, antifogging agents,Gloss enhancers, matting agents, additives to increase electrical and / or thermal conductivity, repellents, fillers and reinforcing agents and mixtures thereof, contain and / or are incorporated into the plastic containing at least one transition metal during the process. Plastic composition containing or consisting of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) containing at least one transition metal selected from the group consisting of metals of groups 6, 7, 8, 9, 10 and 11 of the periodic table, wherein the total content of the transition metals in the plastic composition is at least 10 ppm (wt / wt). Plastic composition according to the preceding claim, characterized in that the plastic composition, 0.02 to 3.0 parts by weight, preferably 0.03 to 0.5 parts by weight of the at least one sugar alcohol (component (A)), 0.02 to 3.0 parts by weight, preferably 0.03 to 0.5 parts by weight of the at least one phenolic antioxidant (component (B)), and 94.0 to 99.96 parts by weight, preferably 99.0 to 99.94 parts by weight of the plastic containing or consisting of at least one transition metal selected from the group consisting of the metals of groups 6, 7, 8, 9, 10 and 11 of the periodic table. A plastic composition according to one of the two preceding claims, characterized in that it comprises at least one further additive selected from the group consisting of amine antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amines as light (HALS) and long-term heat stabilizers (HAS), metal deactivators, filler deactivators, antiozonants, nucleating agents, antinucleating agents, transparency enhancers (clarifiers), impact enhancers, plasticizers, lubricants, rheology or viscosity modifiers, thixotropic agents, chain extenders,The molding compound contains processing aids, demolding aids, flame retardants, pigments, dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, antiblocking agents, coupling agents, crosslinking agents, anticrosslinking agents, hydrophilizing agents, hydrophobizing agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersing agents, compatibilizers, oxygen scavengers, acid scavengers, acetaldehyde and formaldehyde scavengers, blowing agents, degradation additives (prodegradants), defoaming agents, odor traps and odor-improving substances, PVC heat stabilizers, marking agents, antifogging agents, gloss enhancers, matting agents, additives to increase electrical and / or thermal conductivity, repellents, fillers and reinforcing agents, and mixtures thereof. The molding compound or molded part can be produced from a plastic composition according to any one of claims 15 to 17, in particular in the form of: Injection-molded parts, for example bottles, containers, screw-top jars, boxes, barrels, buckets, pallets; technical parts for cars and transport such as bumpers, trim parts, handles, headlight covers, fittings and functional parts; electrical and electronic applications such as housing parts and accessories for televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, connectors, storage media; household, leisure and sporting goods such as flower pots, clothes hangers, figurines, model making; components for furniture such as clamps and clips; parts manufactured by blow molding, in particular hollow bodies such as bottles, fuel tanks, canisters, wash water tanks and expansion tanks; parts manufactured by rotational molding, in particular tanks such as heating oil and rainwater tanks, housings for machines, transport containers; leisure and water sports goods such as...Kayaks, parts produced by calendering, in particular films such as decorative films, wallpapers and floor coverings, parts produced by additive manufacturing processes, for example by Binder jetting (BJ), Laser Sintering (LS), Selective Laser Melting (SLM), Electron Beam Melting (EBM), Fused Deposition Modeling (FDM), Fused Filament Fabrication (FFF), Multi-Jet Modelling (MJM), Poly-Jet Modelling (PJM), Layer Laminated Manufacturing (LLM), Thermal Transfer Sintering (TTS), Digital Light Processing (DLP), Photopolymer Jetting (PJ) and Stereolithography (SL).Use of at least one sugar alcohol (component (A)) in combination with at least one phenolic antioxidant (component (B)) for stabilizing plastics containing at least one transition metal selected from the group consisting of the metals of groups 6, 7, 8, 9, 10 and 11 of the periodic table against oxidative, thermal and / or actinic degradation, wherein the at least one sugar alcohol (component (A)) and the at least one phenolic antioxidant (component (B)) are added. to the plastic containing at least one transition metal, so that the total content of transition metals in the resulting plastic composition is at least 10 ppm (wt / wt).

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