Stabilized transition metal-containing plastic composition, molding component or molded part, and use of stabilizer composition for stabilizing transition

Abstract

The invention relates to a method for stabilizing transition metal-containing plastics against oxidative degradation, thermal degradation and / or photochemical degradation, in which method at least one sugar alcohol is introduced into the transition metal-containing plastics in combination with at least one phenolic antioxidant. The method is carried out in such a way that the resulting additive-incorporated plastic composition has a total transition metal content of at least 10 ppm (weight / weight). The invention also relates to a stabilized plastic composition produced in this way, to moulding compounds or moulded parts which can be produced from said composition, and to the use of at least one sugar alcohol in combination with at least one stabilizer made of phenolic antioxidants for stabilizing plastics containing transition metals.

Description

[0001] The invention relates to a method for stabilizing transition metal-containing plastics against oxidative, thermal and / or photochemical degradation, wherein at least one sugar alcohol is introduced into the transition metal-containing plastic in combination with at least one phenolic antioxidant. The method is carried out in such a way that the resulting additive-containing plastic composition has a total transition metal content of at least 10 ppm (w / w). The invention also relates to the stabilized plastic composition produced thereby, the molding materials or moldings producible therefrom, and the use of a stabilizer composed of at least one sugar alcohol in combination with at least one phenolic antioxidant for stabilizing transition metal-containing plastics.

[0002] Organic materials, such as plastics, are subject to aging processes which ultimately lead to a loss of desired properties, such as mechanical property values. This process, known as autooxidation, leads to changes in the polymer chain, such as changes in the molecular weight and / or the formation of new chemical groups, which are initiated by free radical chain scissions caused by mechanochemical processes or by UV radiation in the presence of oxygen. Stabilizers are therefore used to prevent or at least slow down this aging. Important representatives of stabilizers are antioxidants, which interfere with the free radicals formed during the autooxidation process and thus interrupt the degradation process. A distinction is generally made between primary antioxidants, which react directly with oxygen-containing free radicals or C free radicals, and secondary antioxidants, which react with the intermediately formed hydroperoxides (see C. et al., Antioxidants in Ullmann's encyclopedia of industrial chemistry; Wiley-VCH Verlag, Weinheim 2015). Typical representatives of primary antioxidants are, for example, phenolic antioxidants, amines, and lactones. Types of secondary antioxidants are, for example, phosphorus compounds such as phosphites and phosphonites, and organic sulfur compounds such as thioesters, thioethers, and disulfides. Usually, in practice, primary antioxidants and secondary antioxidants are often used in combination to produce a synergistic effect.

[0003] Patent applications WO 2020 / 083740 and WO 2019 / 063550 disclose methods for stabilizing plastics or plastic recyclables, in which sugar alcohols can be used as co-stabilizers in certain cases. However, the plastic formulations described are not described as plastic formulations containing transition metals.

[0004] US2003 / 2363250 describes transition metal-containing polymers for agricultural film applications, which may also contain hydroxycarboxylic acids, such as erythritol, arabinonic acid and mannoic acid. Since these are sugar acids, they are structurally different from the sugar alcohols according to the present invention and do not show that they have metal passivation. In addition, polymer degradation is also sought, which is contrary to the present invention.

[0005] The presence of transition metals in plastic mixtures poses a challenge to stabilizing plastics. Transition metals may catalyze auto-oxidation processes, thereby accelerating oxidative damage to polymers. Therefore, in order to prevent or reduce the effects of transition metals, so-called metal deactivators are used in plastic formulations (Z. Osawa, Role of metals and metal-deactivators in polymer degradation, Polymer Deg-radation and Stability (1988), 20 (3-4), 203-36), which usually require complex synthesis processes compared to traditional antioxidants.

[0006] It was therefore an object of the present invention to provide an effective stabilization process for transition metal-containing plastics which is easily accessible and therefore particularly cost-effective.

[0007] This object is achieved by the features of the independent claim. The dependent claims describe advantageous developments.

[0008] In a first aspect, the present invention relates to a method for stabilizing a plastic containing at least one transition metal against oxidative, thermal and / or actinic degradation, wherein 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 transition metals in the resulting plastic composition containing at least one transition metal is at least 10 ppm (weight / weight). The at least one transition metal herein is selected from metals of Groups 6, 7, 8, 9, 10 and 11 of the Periodic Table of Elements.

[0009] Surprisingly, it was found that the stabilizer composition used, namely the combination of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)), leads to a significant stabilization of the transition metals contained in the plastic composition. Novel stabilizer compositions and in particular novel methods for stabilizing plastics are proposed, which are very effective for polymers containing transition metals and are particularly cost-effective compared to the prior art.

[0010] A transition metal-containing plastic is defined herein as a plastic having a total transition metal content of at least 10 ppm (weight / weight).

[0011] Preferably, a minimum concentration of at least 50 ppm (weight / weight) is understood here, more preferably at least 100 ppm (weight / weight). Alternatively, or in addition, the total content of the at least one transition metal can be at most 10000 ppm, preferably at most 5000 ppm, more preferably at most 2000 ppm, particularly preferably at most 1000 ppm.

[0012] It is to be understood here that the concentration data for the transition metal content relate to the resulting plastics composition, ie the composition which is produced by adding the stabilizer combination to a plastic containing at least one transition metal.

[0013] In principle, the transition metal may include metals with atomic number 24 (chromium) to atomic number 79 (gold) (except transition metals of Groups 3, 4, 5 and 12 of the periodic table, which are not included). Preferred are transition metals Cr, Mn, Fe, Co, Ni, Cu, Mo; particularly preferred are Fe, Co, Ni, Cu, Cr, Mn. The plastic contains >10 ppm of transition metals, preferably >50 ppm, particularly preferably >100 ppm, preferably in ionic form.

[0014] Also preferably, the definition of at least one transition metal herein does not include metals of Group 6 of the Periodic Table of the Elements. The definition of the term "transition metal" does not include metals of the titanium, vanadium and chromium groups and therefore they are excluded from the calculation of the total transition metal content.

[0015] The ionic metal content in the polymer can be introduced here by contact with the metal, for example cables or coatings, but also by additives, for example fillers. In particular, customary fillers of natural origin often contain transition metals. Transition metals can also be incorporated into the polymer, for example by additives such as pigments, which contain, for example, catalyst residues from the production process.

[0016] According to a preferred embodiment, the at least one sugar alcohol is selected from alditol, cyclitol or mixtures thereof and combinations thereof.

[0017] In particular, the sugar alcohols useful according to the present invention have the following empirical formula

[0018] HOCH2[CH(OH)]nCH2OH,

[0019] R1-OCH2[CH(OH)]nCH2OH, or

[0020] HOCH2[CH(OH)]n[CH(OR1)]CH2OH

[0021] wherein n=2 to 6, preferably n=3 to 5, wherein R1 is an optionally substituted sugar residue.

[0022] The sugar alcohols are particularly preferably selected from the group consisting of threitol, erythritol, galactitol, mannitol, ribitol, sorbitol, xylitol, arabitol, isomalt, lactitol, maltitol, altritol, iditol, maltotriitol and hydrogenated oligosaccharides and hydrogenated polysaccharides with polyol end groups and mixtures thereof, heptitols and octitols, in particular meso-glycerol-allo-heptitol, D-glycerol-D-altro-heptitol, D-glycerol-D-altro-heptitol, Oil-D-manno-heptitol, meso-glycerol-gulo-heptitol, D-glycerol-D-galacto-heptitol (mannoheptitol), D-glycerol-D-glucose-heptitol, L-glycerol-D-glucose-heptitol, D-erythritol-L-galacto-octitol and D-sua-L-galacto-octitol, wherein at least one chain sugar alcohol is preferably selected from erythritol, mannitol, isomalt, maltitol and mixtures thereof.

[0023] Preferred cyclodiols that can be used for the purpose of the present invention are selected from the group consisting of inositols (myo-inositol, scyllo-inositol, D-chiro-inositol, L-chiro-inositol, muco-inositol, neo-inositol, iso-inositol, epi-inositol and cis-inositol), 1,2,3,4-tetrahydroxycyclohexane, 1,2,3,4,5-pentahydroxycyclohexane, quercetin, (1R,2S,3R,4S,5R,6S)-5,6-dimethoxy-1,2,3,4-cyclohexane tetraol (viscumitol), (1R,2R,3S,4S,5R,6S)-6-methoxy-1,2,3,4,5-cyclohexane pentol (bornesi tol), ononitol, (1R,2S,3S,4S,5S,6S)-6-methoxy-1,2,3,4,5-cyclohexanepentaol (ononitol), pinitol, (1R,2R,3R,4S,5R,6S)-3,6-dimethoxy-1,2,4,5-cyclohexanetetraol (pinpollitol), quercetin, ciceritol, quinic acid, shikimic acid and (1S,2S,3S,4R)-5-(hydroxymethyl)-5-cyclohexene-1,2,3,4-tetraol (valienol), preferably myo-inositol.

[0024] The phenolic antioxidant is selected from:

[0025] Alkylated monophenols, such as 2,6-di-tert-butyl-4-methylphenol, 2-tert-butyl-4,6-dimethylphenol, 2,6-di-tert-butyl-4-ethylphenol, 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di-tert-butyl-4-isobutylphenol, 2,6-dicyclopentyl-4-methylphenol, 2-(α-methylcyclohexyl)-4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2 ,4,6-tricyclohexylphenol, 2,6-di-tert-butyl-4-methoxymethylphenol, linear or branched nonylphenols such as 2,6-dinonyl-4-methylphenol, 2,4-dimethyl-6-(1'-methylundecane-1'-yl)phenol, 2,4-dimethyl-6-(1'-methylheptadecan-1'-yl)phenol, 2,4-dimethyl-6-(1'-methyltridecane-1'-yl)phenol and mixtures thereof;

[0026] Alkylthiomethylphenols, such as 2,4-dioctylthiomethyl-6-tert-butylphenol, 2,4-dioctylthiomethyl-6-methylphenol, 2,4-dioctylthiomethyl-6-ethylphenol, 2,6-dioctylthiomethyl-4-nonylphenol;

[0027] Hydroquinone and alkylated hydroquinones, such as 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;

[0028] Tocopherols, such as α-tocopherol, β-tocopherol, γ-tocopherol, δ-tocopherol and mixtures thereof (vitamin E) and tocopherol acetate;

[0029] Hydroxylated thiodiphenyl ethers, such as 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-pentylphenol), 4,4'-bis(2,6-dimethyl-4-hydroxyphenyl) disulfide;

[0030] Alkylene bisphenols, such as 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'-ethylenebis( 4,6-di-tert-butylphenol), 2,2'-ethylenebis(6-tert-butyl-4-isobutylphenol), 2,2'-methylenebis[6-(α-methylbenzyl)-4-nonylphenol], 2,2'-methylenebis[6-(α,α-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-methylphenol) 1,1,3-Tris(5-tert-butyl-4-hydroxy-2-methylphenyl)butane, 1,1-bis(5-tert-butyl-4-hydroxy-2-methylphenyl)-3-n-dodecylmercaptobutane, ethylene glycol bis[3,3-bis(3'-tert-butyl-4'-hydroxyphenyl)butyrate], bis(3-tert-butyl-4-hydroxy-5-methylphenyl)dicyclopentadiene, bis[ 2-(3'-tert-butyl-2'-hydroxy-5'-methylbenzyl)-6-tert-butyl-4-methylphenyl] terephthalate, 1,1-bis-(3,5-dimethyl-2-hydroxyphenyl)butane, 2,2-bis(3,5-di-tert-butyl-4-hydroxyphenyl)propane, 2,2-bis-(5-tert-butyl-4-hydroxy-2-methylphenyl)-4-n-dodecylmercaptobutane, 1,1,5,5-tetrakis(5-tert-butyl-4-hydroxy-2-methylphenyl)pentane;

[0031] O-benzyl compounds, N-benzyl compounds and S-benzyl compounds, such as 3,5,3',5'-tetra-tert-butyl-4,4'-dihydroxydibenzyl ether, octadecyl-4-hydroxy-3,5-dimethylbenzylthioacetate, tridecyl-4-hydroxy-3,5-di-tert-butylbenzylthioacetate, 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-hydroxybenzylthioacetate;

[0032] Hydroxybenzylated malonates, such as dioctadecyl-2,2-bis(3,5-di-tert-butyl-2-hydroxybenzyl)malonate, dioctadecyl-2-(3-tert-butyl-4-hydroxy-5-methylbenzyl)malonate, didodecylmercaptoethyl-2,2-bis(3,5-di-tert-butyl-4-hydroxybenzyl)malonate, bis[4-(1,1,3,3-tetramethylbutyl)phenyl]-2,2-bis(3,5-di-tert-butyl-4-hydroxybenzyl)malonate;

[0033] Aromatic hydroxybenzyl compounds, such as 1,3,5-tris(3,5-di-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, 1,4-bis(3,5-di-tert-butyl-4-hydroxybenzyl)-2,3,5,6-tetramethylbenzene, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)phenol;

[0034] Triazine compounds, such as 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;

[0035] Benzylphosphonates, such as dimethyl 2,5-di-tert-butyl-4-hydroxybenzylphosphonate, diethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, distearyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate, distearyl 5-tert-butyl-4-hydroxy-3-methylbenzylphosphonate, calcium salts of monoethyl 3,5-di-tert-butyl-4-hydroxybenzylphosphonate;

[0036] Acylaminophenols, such as 4-hydroxylauroylanilide, 4-hydroxystearylanilide, N-(3,5-di-tert-butyl-4-hydroxyphenyl)carbamate;

[0037] Esters of β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, for example methanol, ethanol, n-octanol, isooctyl alcohol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propylene glycol, neopentyl glycol, diethylene dithiol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-decanethiol, 3-pentadecanethiol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane;

[0038] Esters of β-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with mono- or polyhydric alcohols, for example methanol, ethanol, n-octanol, isooctyl alcohol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propylene glycol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N′-bis(hydroxyethyl)oxamide, 3-decanethiol, 3-pentadecanethiol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, 3,9-bis[2-{3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionyloxy}-1,1-dimethylethyl]-2,4,8,10-tetraoxaspiro[5.5]undecane;

[0039] Esters of β-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with mono- or polyhydric alcohols, for example methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propylene glycol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-undecanethiol, 3-pentadecanethiol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane;

[0040] Esters of (3,5-di-tert-butyl-4-hydroxyphenyl)acetic acid with monohydric or polyhydric alcohols, for example methanol, ethanol, octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propylene glycol, neopentyl glycol, hexathiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl)isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-undecanethiol, 3-pentadecanethiol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane;

[0041] Amides of β-(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]oxalamide ( XL-1, distributed by Uniroyal);

[0042] Ascorbic acid (vitamin C).

[0043] Particularly preferred phenolic antioxidants have the following structure:

[0044]

[0045]

[0046] Further particularly preferred phenolic antioxidants are based on sustainable raw materials, for example tocopherol (vitamin E), tocotrienols, tocopherols, carotenoids, hydroxytyrosol, flavonols such as chrysin, quercetin, hesperidin, neohesperidin, naringin, morin, camphor oil, fisetin, anthocyanidins such as delphinidin and malvidin, curcumin, carnosic acid, carnosol, rosmarinic acid, resveratrol and tannins.

[0047] 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 80:20 to 20:80, particularly preferably 70:30 to 30:70.

[0048] Components (A) and (B) can be introduced into the plastic containing at least one transition metal, for example, by mixing components (A) and (B) in solid or liquid form with a plastic in solid form containing at least one transition metal 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.

[0049] Preferably 0.01 to 5.0 parts by weight, preferably 0.02 to 1.0 parts by weight, of at least one sugar alcohol (component (A)) are introduced, relative to 95.0 to 99.99 parts by weight, preferably 99.0 to 99.98 parts by weight of plastic containing at least one transition metal.

[0050] It is particularly advantageous to introduce 91 to 99.94 parts by weight, preferably 98.5 to 99.91 parts by weight, of a plastic containing at least one transition metal.

[0051] (A) 0.02 to 3 parts by weight, preferably 0.03 to 0.5 parts by weight, of at least one sugar alcohol, and

[0052] (B) 0.04 to 6 parts by weight, preferably 0.06 to 1 part by weight of at least one phenolic antioxidant.

[0053] The plastics containing at least one transition metal may be selected here from:

[0054] a) Polymers of olefins or dienes, such as polyethylene, in particular LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methyl-pentene-1, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers, and corresponding copolymers of random or block structure, for example polypropylene-polyethylene (EP), EPM or EPDM, ethylene-ethylene-vinyl acetate copolymers (EVA) ), ethylene-acrylate copolymers, such as ethylene-butyl acrylate copolymers, ethylene-acrylic acid-glycidyl acrylate copolymers, and corresponding graft polymers, such as polypropylene-graft-maleic anhydride, polypropylene-graft-acrylic acid, polyethylene-graft-acrylic acid, polyethylene-polybutyl acrylate-graft-maleic anhydride, and blends thereof, such as LDPE / LLDPE, or long-chain branched polypropylene copolymers produced with α-olefins as comonomers, such as 1-butene, 1-hexene, 1-octene or 1-octadecene,

[0055] b) polystyrene, polymethylstyrene, polyvinylnaphthalene, styrene-butadiene copolymers (SB), styrene-butadiene-styrene copolymers (SBS), styrene-ethylene-butylene-styrene copolymers (SEBS), styrene-ethylene-propylene-styrene copolymers, styrene-isoprene copolymers, styrene-isoprene-styrene copolymers (SIS), styrene-butadiene-acrylonitrile copolymers (ABS), styrene-acrylonitrile-acrylate copolymers (ASA), styrene-ethylene polymers, styrene-maleic anhydride polymers, including the corresponding graft copolymers, for example styrene grafted onto butadiene, maleic anhydride grafted onto SBS or SEBS, and graft copolymers of methyl methacrylate, styrene-butadiene and ABS (MABS), and hydrogenated polystyrene derivatives, for example polyvinylcyclohexane,

[0056] 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, homopolymers of epichlorohydrin or copolymers of epichlorohydrin, in particular copolymers of epichlorohydrin with ethylene oxide (ECO),

[0057] d) polymers of unsaturated esters, for example polyacrylates and polymethacrylates, for example polymethyl methacrylate (PMMA), polybutyl acrylate, polylauryl acrylate, polyoctadecyl acrylate, polyglycidyl acrylate, polyglycidyl methacrylate, polyacrylonitrile, polyacrylamide, copolymers such as polyacrylonitrile-polyalkyl acrylate copolymers,

[0058] e) polymers of unsaturated alcohols and their derivatives, for example polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, polyallyl phthalate, polyallyl melamine,

[0059] f) polyacetals, such as polyoxymethylene (POM), and corresponding copolymers, such as copolymers with butyraldehyde,

[0060] g) polyphenylene ether and its blends with polystyrene or polyamide,

[0061] h) polymers of cyclic ethers, for example polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, polytetrahydrofuran,

[0062] i) polyurethanes, in particular linear polyurethanes (PU), polyureas, from hydroxyl-terminated polyethers or polyesters with aromatic or aliphatic isocyanates, such as 2,4-toluene diisocyanate or 2,6-toluene diisocyanate or methylene diphenyl diisocyanate,

[0063] j) polyamides, such as polyamide 6, polyamide 6.6, polyamide 6.10, polyamide 4.6, polyamide 4.10, polyamide 6.12, polyamide 10.10, polyamide 10.12, polyamide 12.12, polyamide 11, polyamide 12 and (semi)aromatic polyamides, such as polyphthalamides, for example polyamides prepared from terephthalic acid and / or isophthalic acid with aliphatic diamines, such as hexamethylenediamine or m-xylylenediamine, or from aliphatic dicarboxylic acids, such as adipic acid or sebacic acid, with aromatic diamines, such as hexamethylenediamine or m-xylylenediamine, or from aliphatic dicarboxylic acids, such as adipic acid or sebacic acid, with aromatic diamines, such as 1,4-diaminobenzene 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,

[0064] k) polyimide, polyamide-imide, polyetherimide, polyester-imide, poly(ether)ketone, polysulfone, polyethersulfone, polyarylsulfone, polyphenylene sulfide, polybenzimidazole, polyhydantoin,

[0065] l) polyesters of aliphatic or aromatic dicarboxylic acids and diols or polyesters of hydroxycarboxylic acids, for example polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate, polyethylene naphthalate, poly-1,4-dihydroxymethyl-cyclohexane terephthalate, polyhydroxybenzoates, polyhydroxynaphthalates, polylactic acid, polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyethylene succinate, polybutylene succinate, polycaprolactone,

[0066] m) Polycarbonate, polyester carbonate and their blends, such as PC / ABS, PC / PBT, PC / PET / PBT, PC / PA,

[0067] n) cellulose derivatives, such as cellulose nitrate, cellulose acetate, cellulose propionate, cellulose butyrate,

[0068] o) Epoxy resins consisting of difunctional or polyfunctional epoxy compounds in combination with curing agents based, for example, on amines, anhydrides, dicyandiamide, thiols, isocyanates or catalytically active curing agents,

[0069] p) phenolic resins, such as phenol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins,

[0070] q) unsaturated polyester resins made from unsaturated dicarboxylic acids and unsaturated diols with vinyl compounds, such as styrene alkyd resins,

[0071] r) silicones, for example silicones based on dimethylsiloxane, methylphenylsiloxane or diphenylsiloxane, for example vinyl-terminated silicones, and

[0072] s) mixtures, combinations or blends of two or more of the above polymers.

[0073] If the polymers specified under a) to r) are copolymers, they may be present in the form of a random structure, a block structure or a pyramidal structure. Furthermore, the polymers may be present in the form of a linear structure, a branched structure, a star structure or a hyperbranched structure.

[0074] The plastic containing at least one transition metal particularly preferably consists of a polymer of an olefin or diene, for example particularly preferably of polyethylene or polypropylene.

[0075] If the polymers specified under a) to r) are stereoregular polymers, they may be present in isotactic, stereospecific form or in atactic form or as stereoblock copolymers.

[0076] Furthermore, the polymers specified under a) to r) may have both amorphous and (semi)crystalline morphologies.

[0077] If necessary, the polyolefins mentioned under a) may also be crosslinked, for example crosslinked polyethylene, also known as X-PE.

[0078] In addition, the compound of the present invention can also be used for stabilizing rubber and elastomer.It can be natural rubber (NR) material or synthetic rubber material.Suitable synthetic rubber material specifically consists of butadiene (BR), styrene-butadiene (SBR), chloroprene (CR), isoprene (IR), isobutylene-isoprene, acrylonitrile-butadiene (NBR or hydrogenated form of HNBR).Other suitable rubbers and elastomers are ethylene-propylene-diene terpolymer (EPDM) and ethylene-propylene copolymer (EPM), polyester polyurethane (AU), polyether polyurethane (EU) and silicone (MQ).

[0079] Besides virgin material, the plastic may also be recycled plastic, for example plastic from industrial collections such as production waste or from households or recyclable material collections.

[0080] In the process, at least one further additive may also be introduced into the plastic containing at least one transition metal, the at least one further additive being selected from aminic antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amine light stabilizers (HALS) and long-term heat stabilizers (HAS), metal deactivators, filler deactivators, antiozonants, nucleating agents, anti-nucleating agents, transparency improvers (clarifiers), impact modifiers, plasticizers, lubricants, rheology modifiers or viscosity regulators, thixotropic agents, chain extenders, processing aids , release agents, flame retardants, pigments, dyes, optical brighteners, antibacterial agents, antistatic agents, slip agents, anti-blocking agents, coupling agents, crosslinking agents, anti-crosslinking agents, hydrophilic agents, hydrophobic agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, deoxidizers, acid scavengers, acetaldehyde scavengers and formaldehyde scavengers, foaming agents, degradation additives (degradation aids), defoamers, odor scavengers, odor improving substances, PVC heat stabilizers, marking agents, anti-fogging agents, gloss improvers, matting agents, additives for improving electrical conductivity and / or thermal conductivity, waterproofing agents, fillers and reinforcing agents and mixtures thereof.

[0081] In another preferred embodiment, the composition comprises secondary antioxidants, in particular phosphites / phosphonites, acid scavengers, co-stabilizers and / or light stabilizers from the hindered amine group (HALS).

[0082] The present invention also 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, wherein the transition metal is selected from the metals of Group 6, Group 7, Group 8, Group 9, Group 10 and Group 11 of the Periodic Table of Elements, wherein the total content of transition metals in the plastic composition is at least 10 ppm (weight / weight).

[0083] The abovementioned preferred embodiments of the method, in particular the quantities and masses of the individual components, also apply without restriction to the purpose of the plastics composition defined according to the invention.

[0084] According to a preferred embodiment, the plastic composition comprises or consists of 0.02 to 3.0 parts by weight, preferably 0.03 to 0.5 parts by weight, of 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 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 at least one transition metal-containing plastic.

[0085] The plastic composition may also contain at least one further additive selected from aminic antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amine light stabilizers (HALS) and long-term heat stabilizers (HAS), conventional metal deactivators, filler deactivators, antiozonants, nucleating agents, anti-nucleating agents, transparency improvers (clarifiers), impact modifiers, plasticizers, lubricants, rheology modifiers or viscosity regulators, thixotropic agents, chain extenders, processing aids, demoulding aids, flame retardants, pigments, Dyes, optical brighteners, antimicrobial agents, antistatic agents, slip agents, anti-blocking agents, coupling agents, crosslinking agents, anti-crosslinking agents, hydrophilic agents, hydrophobic agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, deoxidizers, acid scavengers, acetaldehyde scavengers and formaldehyde scavengers, foaming agents, degradation additives (degradation aids), defoamers, odor scavengers, odor improvement substances, PVC heat stabilizers, marking agents, anti-fogging agents, gloss improvers, matting agents, additives for improving electrical conductivity and / or thermal conductivity, waterproofing agents, fillers and reinforcing agents and mixtures thereof.

[0086] The invention also relates to a moulding material or a moulding produced from the above-described plastic composition according to the invention. The moulding is selected in particular from mouldings produced by injection moulding, such as bottles, containers, screw-top containers, crates, drums, barrels, pallets, technical parts for cars and transport, such as bumpers, decorative parts, handles, headlight covers, accessories and functional parts, electrical and electronic applications such as televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, plug connectors, storage media, household goods, leisure goods and sports goods, such as flower pots, hangers, dolls, model making parts, furniture parts such as brackets and clips, parts produced by blow moulding, in particular hollow bodies, such as bottles, fuel tanks, cans, washing water tanks and expansion tanks, parts produced by rotational moulding, in particular storage tanks, For example fuel tanks, and rainwater storage tanks, machine housings, transport containers, leisure and water sports equipment, such as kayaks, parts produced by calendaring, in particular films, such as decorative films, wallpapers and floor coverings, parts produced by additive manufacturing processes, such as binder jetting (BJ), laser sintering (LS), selective laser melting (SLM), electron beam melting (EBM), fused deposition modeling (FDM), fused filament fabrication (FFF), multi jet molding (MJM), polyjet molding (PJM), laminated laminate manufacturing (LLM), thermal transfer sintering (TTS), digital light processing (DLP), photopolymer jetting (PJ) and stereolithography (SL).

[0087] The invention is particularly suitable for stabilizing plastics in the form of injection-molded moldings, sheets or films, foams, fibers, cables and tubes, profiles, hollow bodies, strips, films such as geomembranes or adhesives, which are produced, for example, by extrusion, injection molding, blow molding, calendaring, pressing methods, spinning processes, rotational molding, e.g.

[0088] Adhesives in the form of films, bottles, bags, screw-top containers for packaging e.g. food, detergents, cosmetics,

[0089] Storage and transport containers such as boxes, crates, drums, barrels, pallets,

[0090] Automobile, railway, aircraft, ship and machine parts, such as bumpers, trims, accessories and functional parts, interior decoration,

[0091] · Construction applications such as profiles, building panels, cable ducts, house coverings, noise barriers, drainage channels, profiled panels, floor coverings,

[0092] Road and landscape applications, such as beacon bases, poles, guardrails, geotextiles,

[0093] Electrical and electronic applications such as housing parts and accessories for televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, connectors, storage media,

[0094] Cable insulation,

[0095] ·Used in pipes and drains for water, gas, sewage, irrigation, and sanitary products such as diapers,

[0096] Furniture and textile applications, such as curtains and cushions, workbenches,

[0097] Household items, leisure goods and sports goods, such as balls, tennis rackets, skis, flower pots, rain barrels, clothes hangers,

[0098] Agricultural applications such as mulches, tunnels or perforated films, plant pots,

[0099] Pharmaceutical applications and crop protection applications, such as encapsulation of active ingredients and bioactive substances,

[0100] In medical technology, it is used to produce suture materials, bandages, orthoses and prostheses.

[0101] Furthermore, the present invention relates to the use of a combination of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) for stabilizing a plastic containing at least one transition metal against oxidative, thermal and / or photochemical degradation, wherein the at least one sugar alcohol (component (A)) and the at least one phenolic antioxidant (component (B)) are added to a plastic containing at least one transition metal selected from the group consisting of metals from Groups 6, 7, 8, 9, 10 and 11 of the Periodic Table of the Elements such that the total content of transition metals in the resulting plastic composition is at least 10 ppm (weight / weight).

[0102] For example, the present invention can be implemented by mixing an additive composition consisting of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) with the polymer to be stabilized, by transferring the polymer matrix into the melt and then cooling it. Alternatively, the additive can also be introduced into the polymer melt in the molten state.

[0103] If further components are added to the polymer composition, these components can be added to the polymer alone in the form of liquids, powders, granules or compacted products or together with the above-described additive composition according to the invention.

[0104] The above-mentioned additive composition and, if necessary, further additives are incorporated into the plastic by conventional processing methods, preferably by mixers, kneaders or extruders. Preferred processing machines are extruders, such as single-screw extruders, twin-screw extruders, planetary roller extruders, ring extruders, co-kneaders, etc., which are preferably equipped with a vacuum degasser. Processing here can be carried out under air conditions or, if necessary, under inert gas conditions.

[0105] The plastic composition containing the additive composition can be processed by conventional plastic processing methods in continuous and discontinuous processes, such as extrusion, calendering, blow molding, pultrusion, injection molding, pressing, transfer molding, casting, blow molding, rotational molding, thermoforming, sintering, foaming, or by additive manufacturing processes to produce granular materials, moldings, semi-finished products, fibers and films.

[0106] Suitable extruders are piston extruders and screw extruders, single-screw extruders, twin-screw extruders, multi-screw extruders, planetary roller extruders, in particular for producing plastic granulate, pipes, rods, hoses, profiles, sheathing, sheets, films, V-belts, toothed belts, seals, foam sheets (XPS), fibers and filaments for additive manufacturing processes.

[0107] Suitable injection molding machines may be hydraulic or electromechanical and may include multi-component injection molding and in-mold processes.

[0108] Mouldings produced by injection moulding are, for example, bottles, containers, screw-top containers, crates, drums, barrels, pallets, technical parts for the automotive and transport sectors, for example bumpers, decorative parts, handles, headlight covers, accessories and functional parts, electrical and electronic applications, for example televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drill bits, plug connectors, storage media, furnishing items, leisure goods and sports goods, for example flower pots, hangers, dolls, model making parts, furniture components such as brackets and clips.

[0109] Parts produced by blow moulding are in particular hollow bodies, such as bottles, fuel tanks, cans, wash water tanks and expansion tanks.

[0110] Parts produced by rotational moulding are, in particular, tanks, such as fuel tanks, rainwater tanks, machine housings, transport containers, leisure and water sports items, such as kayaks.

[0111] Calendering is used in particular for the production of films, such as decorative films, wallpapers and floor coverings.

[0112] Furthermore, the additive composition according to the invention can be prepared and incorporated in the form of so-called masterbatches or concentrates, which contain, for example, 10 to 90% of the composition according to the invention in polymer or polymer recyclate.

[0113] The present invention is described in more detail with reference to the following exemplary embodiments, without limiting the present invention.

[0114] Exemplary embodiments

[0115] In order to test the effect of the stabilizer according to the invention, commercially available polypropylene (Moplen HP 500N, Lyondell Basell Industries) was homogenized with the stabilizer according to the invention in a powder-powder mixture and circulated in a twin-screw micro-extruder (MC 5, manufacturer DSM) at 200° C. and 90 rpm for 30 minutes, and the force drop was recorded. The force is a direct indicator of the molecular weight of the polypropylene: the smaller the drop, the better the stabilization effect.

[0116]

[0117] AO-1: Pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)-propionate

[0118] AO-2: Ethylene-1,2-bis[3,3-bis(3-tert-butyl-4-hydroxyphenyl)butyrate (Hos-tanox O3, Clariant SE)

[0119] AO-3: 1,3,5-trimethyl-2,4,5-tri[(3',5'-di-tert-butyl)-4'-hydroxybenzyl]-benzene (Irganox 1330, BASF SE)

[0120] AO-4: 2',3-bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]propionylhydrazide (Irganox MD1024, BASF SE)

[0121] The addition of transition metals leads to a significant decrease in the stability of polypropylene (Comparative Examples 2-7); whereas, using the additive according to the present invention, no degradation of the polypropylene is observed even after 30 minutes, ie, an excellent stabilizing effect is achieved.

Claims

1. A method for stabilizing a plastic containing at least one transition metal against oxidative, thermal and / or photochemical degradation, wherein at least one sugar alcohol (component (A)), and At least one phenolic antioxidant (component (B)) Introduced into a plastic containing at least one transition metal, the transition metal is selected from the metals of Group 6, Group 7, Group 8, Group 9, Group 10 and Group 11 of the Periodic Table of the Elements, so that the total content of transition metals in the resulting plastic composition is at least 10 ppm (weight / weight).

2. The method according to claim 1, characterized in that The total content of transition metals in the resulting plastic composition is at least 50 ppm (w / w), preferably at least 100 ppm (w / w), and / or at most 10,000 ppm, preferably at most 5,000 ppm, more preferably at most 2,000 ppm, particularly preferably at most 1,000 ppm.

3. The method according to any one of the preceding claims, characterized in that The at least one transition metal is selected from Fe, Co, Ni, Cu, Cr, Mn and mixtures thereof.

4. The method according to any one of the preceding claims, characterized in that The definition of at least one transition metal excludes metals from Groups 4, 5 and 6 of the Periodic Table of the Elements.

5. The method according to any one of the preceding claims, characterized in that At least one sugar alcohol selected from Chain sugar alcohol, Cyclotol, and mixtures and combinations thereof.

6. The method according to any one of the preceding claims, characterized in that Chain sugar alcohol has the following empirical formula HOCH2[CH(OH)] n CH2OH, R1-OCH2[CH(OH)] n CH2OH, or HOCH2[CH(OH)] n [CH(OR1)]CH2OH wherein n=2 to 6, preferably n=3 to 5, wherein R1 is an optionally substituted sugar residue.

7. The method according to any one of the two preceding claims, characterized in that The sugar alcohol is selected from the group consisting of threitol, erythritol, galactitol, mannitol, ribitol, sorbitol, xylitol, arabitol, isomalt, lactitol, maltitol, altritol, iditol, maltotriitol and hydrogenated oligosaccharides and hydrogenated polysaccharides with polyol end groups and mixtures thereof, heptitols and octitols, in particular meso-glycerol-allo-heptitol, D-glycerol-D-altro-heptitol, D-glycerol- D-manno-heptitol, meso-glycerol-gulo-heptitol, D-glycerol-D-galacto-heptitol (mannoheptitol), D-glycerol-D-glucose-heptitol, L-glycerol-D-glucose-heptitol, D-erythritol-L-galacto-octitol and D-sua-L-galacto-octitol, wherein at least one sugar alcohol is preferably selected from erythritol, mannitol, isomalt, maltitol and mixtures thereof.

8. The method according to any one of claims 5 to 7, characterized in that At least one cyclohydrido alcohol is selected from the group consisting of inositols (myo-inositol, scyllo-inositol, D-chiro-inositol, L-chiro-inositol, muco-inositol, neo-inositol, iso-inositol, epi-inositol and cis-inositol), 1,2,3,4-tetrahydroxycyclohexane, 1,2,3,4,5-pentahydroxycyclohexane, quercetin, (1R,2S,3R,4S,5R,6S)-5,6-dimethoxy-1,2,3,4-cyclohexane tetraol, (1R,2R,3S,4S,5R,6S)-6-methoxy-1,2,3 ,4,5-cyclohexanepentaol, nitroglycerin, (1R,2S,3S,4S,5S,6S)-6-methoxy-1,2,3,4,5-cyclohexanepentaol, pinitol, (1R,2R,3R,4S,5R,6S)-3,6-dimethoxy-1,2,4,5-cyclohexanetetraol, quesmol, chickpea alcohol, quinic acid, shikimic acid and (1S,2S,3S,4R)-5-(hydroxymethyl)-5-cyclohexene-1,2,3,4-tetraol, preferably myo-inositol.

9. The method according to any one of the preceding claims, characterized in that 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 80:20 to 20:80, particularly preferably 70:30 to 30:

70.

10. The method according to any one of the preceding claims, characterized in that Components (A) and (B) are introduced into the plastic containing at least one transition metal in the following manner: Mixing component (A) and component (B) in solid or liquid form with a plastic in solid form containing at least one transition metal, and melting the resulting mixture and then cooling it, or Component (A) and component (B) which are present in solid or liquid form are melted and the resulting melt is introduced into a melt of a plastic containing at least one transition metal.

11. The method according to any one of the preceding claims, characterized in that 0.01 to 5.0 parts by weight, preferably 0.02 to 1.0 parts by weight, of at least one sugar alcohol (component (A)) are introduced relative to 95.0 to 99.99 parts by weight, preferably 99.0 to 99.98 parts by weight of plastic containing at least one transition metal.

12. The method according to any one of the preceding claims, characterized in that Relative to 91 to 99.94 parts by weight, preferably 98.5 to 99.91 parts by weight, of a 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 at least one sugar alcohol, and (B) 0.04 to 6 parts by weight, preferably 0.06 to 1 part by weight of at least one phenolic antioxidant.

13. The method according to any one of the preceding claims, characterized in that The plastic containing at least one transition metal is selected from: a) polymers of olefins or dienes, such as polyethylene, in particular LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methyl-pentene-1, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers and corresponding copolymers in random or block form, 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 as polypropylene-graft-maleic anhydride, polypropylene-graft-acrylic acid and polyethylene-graft-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 the corresponding graft copolymers such as styrene grafted onto butadiene, maleic anhydride grafted onto SBS or SEBS, and 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, homopolymers of epichlorohydrin or copolymers of epichlorohydrin, in particular copolymers of epichlorohydrin with ethylene oxide (ECO), d) polymers of unsaturated esters, such as polyacrylates and polymethacrylates, such as polymethyl methacrylate (PMMA), polybutyl acrylate, polylauryl acrylate, polyoctadecyl acrylate, polyglycidyl acrylate, polyglycidyl methacrylate, polyacrylonitrile, polyacrylamide, copolymers such as polyacrylonitrile-polyalkyl acrylate copolymers, e) polymers of unsaturated alcohols and their 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 butyraldehyde, g) polyphenylene ether and its blends with polystyrene or polyamide, h) polymers of cyclic ethers, such as polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, polytetrahydrofuran, i) polyurethanes, in particular linear polyurethanes (PU), polyureas, from hydroxyl-terminated polyethers or polyesters with aromatic or aliphatic isocyanates, such as 2,4-toluene diisocyanate or 2,6-toluene diisocyanate or methylene diphenyl diisocyanate, j) polyamides, such as polyamide 6, polyamide 6.6, polyamide 6.10, polyamide 4.6, polyamide 4.10, polyamide 6.12, polyamide 10.10, polyamide 10.12, polyamide 12.12, polyamide 11, polyamide 12 and (semi)aromatic polyamides, such as polyphthalamides, for example polyamides prepared from terephthalic acid and / or isophthalic acid with aliphatic diamines, such as hexamethylenediamine or m-xylylenediamine, or from aliphatic dicarboxylic acids, such as adipic acid or sebacic acid, with aromatic diamines, such as hexamethylenediamine or m-xylylenediamine, or from aliphatic dicarboxylic acids, such as adipic acid or sebacic acid, with aromatic diamines, such as 1,4-diaminobenzene 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) polyimide, polyamide-imide, polyetherimide, polyester-imide, poly(ether)ketone, polysulfone, polyethersulfone, polyarylsulfone, polyphenylene sulfide, polybenzimidazole, polyhydantoin, l) polyesters of aliphatic or aromatic dicarboxylic acids and diols or polyesters of hydroxy-carboxylic acids, such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polytrimethylene terephthalate, polyethylene naphthalate, poly-1,4-dihydroxymethyl-cyclohexane terephthalate, polyhydroxybenzoates, polyhydroxynaphthalates, polylactic acid, polyhydroxybutyrate (PHB), polyhydroxyvalerate (PHV), polyethylene succinate, polybutylene succinate, polycaprolactone, m) Polycarbonate, polyester carbonate and their blends, 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 difunctional or polyfunctional epoxy compounds in combination with curing agents based, for example, on amines, anhydrides, dicyandiamide, thiols, isocyanates or catalytically active curing agents, p) phenolic resins, such as phenol-formaldehyde resins, urea-formaldehyde resins, melamine-formaldehyde resins, q) unsaturated polyester resins made from unsaturated dicarboxylic acids and unsaturated diols with vinyl compounds, such as styrene alkyd resins, r) silicones, for example silicones based on dimethylsiloxane, methylphenylsiloxane or diphenylsiloxane, for example vinyl-terminated silicones, and s) mixtures, combinations or blends of two or more of the above polymers.

14. The method according to any one of the preceding claims, characterized in that The plastic containing at least one transition metal contains at least one further additive and / or at least one further additive is incorporated into the plastic containing at least one transition metal in the process, the additive being selected from the group consisting of: amine antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amine light stabilizers (HALS) and long-term heat stabilizers (HAS), metal deactivators, filler deactivators, antiozonants, nucleating agents, anti-nucleating agents, transparency improvers (clarifiers), impact modifiers, plasticizers, lubricants, rheology modifiers or viscosity regulators, thixotropic agents. Agents, chain extenders, processing aids, mold release agents, flame retardants, pigments, dyes, optical brighteners, antibacterial agents, antistatic agents, slip agents, anti-blocking agents, coupling agents, crosslinking agents, anti-crosslinking agents, hydrophilic agents, hydrophobic agents, surface modifiers, hydrolysis stabilizers, adhesion promoters, dispersants, compatibilizers, deoxidizers, acid scavengers, acetaldehyde scavengers and formaldehyde scavengers, foaming agents, degradation additives (degradation aids), defoamers, odor scavengers, odor improvement substances, PVC heat stabilizers, marking agents, anti-fogging agents, gloss improvers, matting agents, additives for improving electrical conductivity and / or thermal conductivity, waterproofing agents, fillers and reinforcing agents and mixtures thereof.

15. A plastic composition comprising 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 metals of Group 6, 7, 8, 9, 10 and 11 of the Periodic Table of the Elements, wherein the total content of transition metals in the plastic composition is at least 10 ppm (weight / weight).

16. Plastic composition according to the preceding claim, characterized in that 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 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 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 at least one plastic containing a transition metal selected from the group consisting of metals of Groups 6, 7, 8, 9, 10 and 11 of the Periodic Table of the Elements.

17. Plastic composition according to any one of the two preceding claims, characterized in that At least one additional additive is selected from the group consisting of: amine antioxidants, secondary antioxidants, in particular phosphites, phosphonites or thioethers, UV absorbers, light stabilizers, in particular hindered amine light stabilizers (HALS) and long-term heat stabilizers (HAS), metal deactivators, filler deactivators, antiozonants, nucleating agents, anti-nucleating agents, transparency improvers (clarifiers), impact modifiers, plasticizers, lubricants, rheology modifiers or viscosity regulators, thixotropic agents, chain extenders, processing aids, demoulding aids, flame retardants, pigments, dyes, optical enhancers, Whitening agent, antibacterial agent, antistatic agent, slip agent, anti-blocking agent, coupling agent, cross-linking agent, anti-cross-linking agent, hydrophilic agent, hydrophobic agent, surface modifier, hydrolysis stabilizer, adhesion promoter, dispersant, compatibilizer, deoxidizer, acid scavenger, acetaldehyde scavenger and formaldehyde scavenger, foaming agent, degradation additive (degradation aid), defoamer, odor scavenger, odor improving substance, PVC heat stabilizer, marking agent, anti-fogging agent, gloss improver, matting agent, additives for improving electrical conductivity and / or thermal conductivity, waterproofing agent, filler and reinforcing agent and mixtures thereof.

18. A molding compound or a molding, which is made of the plastic composition according to any one of claims 15 to 17, in particular in the following form: Mouldings produced by injection moulding, such as bottles, containers, screw-top containers, crates, drums, barrels, pallets, technical parts for cars and transport, such as bumpers, decorative parts, handles, headlight covers, accessories and functional parts, electrical and electronic applications such as televisions, computers, mobile phones, washing machines, dishwashers, coffee machines, drills, plug connectors, storage media, household goods, leisure goods and sports goods, such as flower pots, hangers, dolls, model making parts, furniture components such as brackets and clips, Components produced by blow molding, in particular hollow bodies such as bottles, fuel tanks, cans, wash water tanks and expansion tanks, Components produced by rotational moulding, in particular tanks, such as fuel tanks and rainwater tanks, machine housings, transport containers, leisure and water sports articles, such as kayaks, Components produced by calendering, in particular films, such as decorative films, wallpapers and floor coverings, Parts produced by additive manufacturing processes, such as binder jetting (BJ), laser sintering (LS), selective laser melting (SLM), electron beam melting (EBM), fused deposition modeling (FDM), fused filament fabrication (FFF), multi jet molding (MJM), poly jet molding (PJM), laminated laminate manufacturing (LLM), thermal transfer sintering (TTS), digital light processing (DLP), photopolymer jetting (PJ) and stereolithography (SL).

19. Use of a combination of at least one sugar alcohol (component (A)) and at least one phenolic antioxidant (component (B)) for stabilizing a plastic containing at least one transition metal against oxidative degradation, thermal degradation and / or photochemical degradation, wherein the transition metal is selected from metals of Group 6, Group 7, Group 8, Group 9, Group 10 and Group 11 of the Periodic Table of the Elements, 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 metal in the resulting plastic composition is at least 10 ppm (weight / weight).

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