PROCEDURE FOR STABILIZING RECYCLED HALOGEN-FREE THERMOPLASTIC PLASTIC PRODUCTS, PLASTIC COMPOSITION, STABILIZER COMPOSITION, AND USE OF THE STABILIZER COMPOSITION

Abstract

The present invention relates to a process for stabilizing recycled halogen-free thermoplastic products against oxidative, thermal, and / or actinic degradation. The present invention also relates to a correspondingly stabilized plastic composition, a stabilizer composition for stabilizing recycled halogen-free thermoplastic products, and uses thereof.

Description

PROCEDURE FOR THE STABILIZATION OF RECYCLED HALOGEN-FREE THERMOPLASTIC PLASTIC PRODUCTS, PLASTIC COMPOSITION, STABILIZER COMPOSITION, AS WELL AS USE OF THE STABILIZER COMPOSITION The present invention relates to a process for stabilizing halogen-free thermoplastic recycled products against oxidative, thermal, and / or actinic degradation. The present invention also relates to a correspondingly stabilized plastic composition, a stabilizer composition for stabilizing halogen-free thermoplastic recycled products, and uses thereof. Recycled plastic products are a growing market and an important element in the circular economy of raw materials, where recycled products should ideally replace virgin plastics with an identical or at least comparable property profile. However, in the case of recycled products from plastic parts production (so-called “post-industrial” recycled products), and especially in the case of waste plastics (so-called “post-consumer” recycled products), irreversible modifications of the polymer chain often occur over the years due to mechanochemical, chemical or light-induced processes (see e.g. R. Pfaendner et al., Angew. Makromol. Chemie 1995, 232, 193-227, J. Pospisil et al., Pol. Degr. Stab. 1995, 48, 351-358).Due to radical reactions in the presence of oxygen, generally referred to as autoxidation, new chemical groups are generated in the polymer chain and / or the polymer composition is modified at the molecular level. The groups formed during the aging process are often carbonyl, aldehyde, or acid groups, especially in the case of polyolefins such as polyethylene or polypropylene. The concentration of these newly formed groups increases with the time of use and the application field (UV light, high temperatures, contact media). The structural inhomogeneity of a recycled product influences the properties of the plastic, such as its mechanical properties.Furthermore, recycled or previously damaged plastic products are more sensitive to oxidation than new material, as degradation products act as initiation sites for further oxidation or as prodegradants (A.S. Maxwell, Pol. Eng. Sci. 2008, 381-385, I.H. Craig, J.R. White, J. Mater. Sci. 2006, 41, 993-1006). In order to achieve an improvement in the quality of recycled plastic products, post-stabilization with selected stabilizers, such as antioxidants, is an essential procedure. The stabilizers used protect the recycled product from further oxidative (or photooxidative) deterioration or at least delay it. Due to the described structural deviations of the recycled product and the new article, the stabilized stabilizer composition for a recycled product also differs from the stabilizer composition of the new article (see, e.g., R.Pfaendner, Kunststoffe International 12 / 2015, 4144). Due to the currently recognized differences between new plastic articles and recycled plastic products, special stabilizer compositions for recycled products are known and are also available as commercial products (e.g., Recyclostab Products from BYK-Chemie GmbH, Wesel). Known industrial stabilization solutions that take the requirements of recycled products into account are described, for example, in the following patents / patent applications: Stabilization composition consisting of a phenolic antioxidant, a phosphite and a fatty acid salt (EP 0662101). Stabilization composition consisting of a phenolic antioxidant, a phosphite and a metal oxide, such as calcium oxide (US 6525158, US 6251972). Stabilization composition consisting of a phenolic antioxidant and a polyfunctional epoxide (EP 0702704). Stabilization by a macrocyclic piperidine (US 5789470). Stabilization composition consisting of an aromatic secondary amine and a polyfunctional epoxide (WO 97 / 30112). Decolorization of polyolefins damaged by hydroxylamine (EP 0470048) Mixture of antioxidants, lubricants, anti-caking agents, UV stabilizers and antistatic agents for recycled product sheets czfronn / Lznz / e / YiAi (DD 288161) Stabilization composition for mixed plastics consisting of a phenolic antioxidant and a phosphite / phosphonite (EP 0506614) Despite the known solutions for the post-stabilization of recycled products, there is still a need, as before, for particularly effective, less polluting and cost-effective stabilizer compositions for the recycled products obtained with the compositions according to the invention. The stabilizers for recycled products mentioned above (see above) are modifications of the stabilizers for new plastics; none of the combinations mentioned allows for interaction or reaction with the carbonyl groups that frequently form during aging / oxidation. Therefore, the present invention represents a new departure in the stabilization of recycled plastic products. Patent document WO 97 / 30112 describes stabilization compositions consisting of an aromatic secondary amine and a polyfunctional epoxide. However, this does not involve (semi)aromatic or aliphatic amines. Furthermore, the patent document (see Appendix, Entfárbung von geschádigten Pololefinen durch ein Hydroxylamine) describes stabilization compositions consisting of an aromatic secondary amine and a polyfunctional epoxide. The hydroxylamines mentioned there have a free OH group and are therefore structurally distinct from the hydroxylamine ethers or esters mentioned, which contain a free amino group. It is therefore an objective of the present invention to provide means and ways for the stabilization of halogen-free thermoplastic recycled plastic products. This objective is achieved, with respect to the stabilization process, with the features of patent claim 1, with respect to a stabilized plastic recycled product composition, with the features of patent claim 11, with respect to a stabilizer composition, with the features of patent claim 20, as well as purposes of use of the stabilizer composition, with the features of patent claim 24. The respective dependent patent claims represent advantageous variants. The object of the present invention therefore incorporates, in a first aspect: a process for the stabilization of recycled halogen-free thermoplastic plastic products against oxidative, thermal and / or actinic degradation, in which (A) at least one compound capable of reacting with carbonyl groups is incorporated, in combination with (B) at least one primary antioxidant and / or (C) at least one secondary antioxidant, in a recycled halogen-free thermoplastic plastic product, in which neither alditols nor cyclitols are used. It was surprisingly found that compounds that can react with carbonyl groups present in recycled plastic products have a high potential to effectively protect the corresponding recycled plastic products against oxidative, thermal, and / or actinic degradation. According to a preferred embodiment, the at least one compound capable of reacting with the carbonyl groups is selected from the group consisting of aliphatic primary amines, aliphatic secondary amines, thiols, hydroxylamine ethers, hydroxylamine esters, hydrazines, oligomers or polymers with an alcohol group bonded to aliphatic carbons such as polyvinyl alcohols and their copolymers with vinyl acetate or polyhydroxy(meth)acrylates, as well as hydantoins or thiohydantoins. Exemplary oligomers / polymers with an alcohol group bonded to aliphatic carbons are, for example, compounds with the following structures shown: czfrQnn / Lznz / e / YiAi czfrQnn / Lznz / e / Yi / u The index n means, in relation to the previously mentioned compounds, preferably 1 to 10. It is particularly advantageous if the at least one compound capable of reacting with carbonyl groups is selected from the group consisting of laurylamine, stearylamine, hexamethylenediamine, decanediamine, dodecanediamine, dilaurylamine, distearylamine, 1-dodecanethiol, 1-hexadecanethiol, polycaprolactone tetra-3-mercaptopropionate, polyvinyl alcohol having a weight-average molecular weight of 1,000 to 50,000 g / mol, polyhydroxy(meth)acrylates having a weight-average molecular weight of 1,000 to 50,000 g / mol, midazolidine-2,4-dione, and also compounds with the following structures: QF f' ' δ Ί ' ¿ ' A ... Λ A - lo - S. According to the present invention, a recycled plastic product is understood to mean a recycled plastic product according to the conceptual definition in accordance with DIN EN 15347:2007. Furthermore, there are relevant international standards for many types of recycled plastic products. For recycled PET plastic products, for example, DIN EN 15353:2007 is relevant. Recycled PS products are described in greater detail in DIN EN 15342:2008. Recycled PE products are discussed in DIN EN 15344:2008. Recycled PP products are characterized in DIN EN 15345:2008. For the purposes of the corresponding special recycled plastic products, the present patent application adopts the definitions of these international standards. Unlike new plastics, recycled plastic products often exhibit pre-deterioration, i.e., new chemical groups are generated in the polymer chain through oxidative or (photo)oxidative processes. In the case of polyolefins, for example, these are predominantly carbonyl groups, which are either absent or present in the article only to a very small extent. The concentration of carbonyl groups is therefore simultaneously a measure of the polymer's pre-deterioration. The carbonyl group concentration can be determined using well-known analytical methods, such as infrared spectroscopy, as described, for example, in E. Richaud et al. Pol. Degr. Stab. 2009, 94, 410-420. In this context, the vibration absorption of carbonyl groups is measured in the range of 1720 cm'1. According to the invention, "halogen-free" is understood to mean that the thermoplastic plastic contains less than 1% of halogen-containing polymers, such as PVC or PVDC. Preferably, the halogen-free thermoplastic plastic contains less than 0.5%, particularly preferably less than 0.1%, of halogen-free polymers. Very particularly preferably, the halogen-free thermoplastic plastic does not contain any halogen-containing polymers. Thus, in the case of the methods according to the invention, at least one compound capable of reacting with carbonyl groups (component (A)) is incorporated into a recycled product made of halogen-free thermoplastic plastic in combination with at least one primary antioxidant (component (B)) and / or at least one secondary antioxidant (component (C)). In this case, components (A) to (C) can be incorporated individually or separately into the recycled plastic product. Alternatively, it is possible for components (A) to (C) to be incorporated together into the recycled plastic product in the form of a composition containing components (A) to (C) or in the form of a composition consisting of components (A) to (C). If at least one primary antioxidant and at least one secondary antioxidant are used, these can also be incorporated into the recycled plastic product individually or separately from each other or together in the form of a mixture. The component (A) used according to the invention in combination with component (B) and / or component (C) used in addition to component (A) together act as a stabilizer of the halogen-free thermoplastic recycled product, in which oxidative, thermal and / or actinic degradation of the halogen-free thermoplastic recycled product is inhibited or prevented. In other words, by incorporating component (A), and optionally additionally component (B), into the halogen-free thermoplastic recycled product, the plastic is stabilized against oxidative, thermal and / or actinic degradation. The halogen-free thermoplastic recycled product used in the process according to the invention is preferably a polyolefin recycled product, for example, a polypropylene recycled product or a polyethylene recycled product. The composition according to the invention is also particularly suitable for the stabilization of previously deteriorated recycled products, especially recycled polyolefin products whose carbonyl group content, determined by absorption in the infrared spectrum, amounts to at least 0.01 mol / kg, preferably is greater than 0.02 mol / kg and with particular preference is greater than 0.05 mol / kg. In a preferred embodiment, the at least one primary antioxidant (B) is selected from the group consisting of phenolic antioxidants, hydroxylamines, lactones and mixtures thereof. Phenolic antioxidants can be used, for example: alkylated monophenols, such as, for example, 2,6-di-tert-butyl-4-meth¡lphenol, 2íe / 'c-butyl-4,6-dimet¡lphenol, 2,6-di-tert-but¡l-4-ethylphenol, 2,6-di-tert-butyl-4-n-butylphenol, 2,6-di-tert-butyl-4-isobut¡lphenol, 2,6-diciclopentyl-4-methylphenol, 2-(ot-methylcyclohex¡l)4,6-dimethylphenol, 2,6-dioctadecyl-4-methylphenol, 2,4,6-triclohexylphenol, 2,6-d¡-tercbutyl-4-methoxymethylphenol, linear or branched nonylphenols, such as, for example, 2,6-dinonyl-4-methylphenol, 2,4-dimethyl-6-(1 '-methylundec-1 '-yl)phenol, 2,4-dimethyl-6-(1 czfrQnn / Lznz / e / YiAi methylheptadec-1 '-yl)phenol, 2,4-dimethyl-6-(1 '-methyltridec-r-¡l)phenol and mixtures thereof; alkylthiomethylphenols, such as, for example, 2,4-dioctylthiomethl-6-tert-butlphenol, 2,4-dioctylthiomethyl-6-methlphenol, 2,4-dioctylthiomethyl-6-ethlphenol, 2,6-didodecylt¡omet¡l-4nonylphenol; alkylated hydroquinones and hydroquinones, such as, for example, 2,6-di-iercbutyl-4-methoxyphenol, 2,5-di-tert-butylhydroquinone, 2,5-di-tert-amylhydroquinone, 2,6diphenyl-4-octadecyloxyphenol, 2,6-di-tert-butylhydroquinone,; 2,5-di-tert-butyl-4hydroxyanisole, 3,5-d¡-ierc-butyl-4-h¡drox¡anisole, 3,5-di-ierc-butyl-4hydroxyphenyl stearate, bis(3,5-d¡-ierc-but¡l-4-hydrox¡lphen¡lo); tocopherols, such as, for example, α-, β-, γ-, δ-tocopherol and mixtures thereof (vitamin E); thiodiphenyl hydroxylated ethers, such as, for example, 2,2'-thiob¡s(6-tert-but¡l-4methylphenol), 2,2'-thiob¡s(4-oct¡lphenol), 4,4'-thiob¡s(6-ierc-butyl-3-meth¡lphenol), 4,4'thiob¡s(6-tert-but¡l-2-meth¡lphenol), 4,4'-thiob¡s(3,6-d¡-sec-am¡lphenol), 4,4'b¡s(2,6-d¡me¡l-4-hydroxyphen¡l) disulfide; alkydenbisphenols, such as, for example, 2,2'-methylenebis(6-terc-but¡l-4methylphenol), 2,2'-methyleneb¡s(6-íerc-but¡l-4-et¡lphenol), 2,2'-methyleneb¡s[4-met¡l-6-l-phenol. 2,2'-methylenebis(4-meth¡l-6-cyclhex¡lphenol), 2,2'-methylenebis(6nonyl-4-methylphenol), 2,2'-methyleneb¡s(4,6-d¡-terc-but¡l-phenol), 2,2'-ethyleneb¡s(4,6,c-butylphenol), 2,2'-ethyl¡denb¡s(6-íerc-butyl-4-¡sobut¡lphenol), 2,2'-methylenebis[6-(amethylbenc¡l)-4-nonylphenol], 2,2'-methylenebis[6-(oc,cc-d¡methylbenc¡l)-nonylphenol] 4,4'methylenbis-(2,6-d¡-íerc-but¡lphenol), 4,4'-methyleneb¡s(6-rerc-but¡l-2-meth¡lphenol), 1,1 b¡s(5-terc-but¡l-4-hydroxy¡-2-met¡lphenol)butanol, 2,6-bis(3-ierc-butyl-5-met¡l-2hydroxybenzyl)-4-meth¡lphenol, 1,1,3-tr¡s(5-ierc-but¡l-4-hydroxy¡-2-met¡lphen¡l)butane, 1,1b¡s(5-terc-but¡l-4-h¡drox¡-2-methylphen¡l)-3-n-dodec¡lmercaptobutane, bis[3,3-bis(3'terc-butyl-4'-hydrox¡-phen¡l)but¡rate] of ethylene glycol, bis(3-íerc-butyl-4-hydroxy¡-5methylphenyljdicyclopentadiene,bis[2-(3'-terc-but¡l-2'-h¡drox¡-5'met¡lbenc¡l)-6-terc-but¡l-4-methylphen¡lo], 1,1 -bis-(3,5-d¡met¡l-2-hydroxybuthen¡l) 2,2-b¡s(3,5-d¡-ierc-butyl-4-h¡drox¡phen¡l)propane, 2,2-bis-(5-ierc-but¡l-4-h¡drox¡-2methylphenyl)-4-n-dodec¡lmercaptobutane, 1,1,5,5-tetra(5-terc-butyl-4-hydroxy¡-2methylphenyl)pentane;, O-, N-, and S-benzyl compounds, such as, for example, 3,5,3',5'-tetra-tercbut¡l-4,4'-dihydroxyd¡benc¡l ether, octadecyl-4-hydroxy mercaptoacetate / 3,5czfrQnn / Lz / e / Ybenzyl, tridec¡l-4-hydroxy-3,5-d¡-ierc-but¡lbenzyl mercaptoacetate, tris(3,5-d¡-terc-but¡l-4-hydroxybencl)amine, dithioterephthalate bis(4-ierc-butyl-3hydrox¡-2,6-d¡methylbenzl), b¡s(3,5-d¡-tert-but¡l-4-hydroxybenzl), mercaptoacetate of ¡so-octyl-3,5-d¡-terc-butyl-hydroxy-benzene; hydroxybenzylated malonates, such as, for example, dioctadecyl-2,2-bis(3,5-di-tert-butyl-2-hydroxybenzyl) malonate, doctadecyl-2-(3-di-tert-butyl-4-hydroxy-5-methylbenzyl) malonate, dododecylmercaptoethyl-2,2-bis(3,5-di-tert-butyl-4-hydroxybenzyl) malonate, bis[4-(1,1,3,3-tetramethylbutyl)phenyl]-2,2-bis(3,5-di-tert-butyl-4-hydroxybenzyl) malonate; aromatic hydroxybenzyl compounds, such as, for example, 1,3,5-tris(3,5d¡-tert-butyl-4-hydroxybenzyl)-2,4,6-trimethylbenzene, 1,4-bis(3,5-di-tert-butyl-4-hydroxybenzyl)-2,3,5,6-tetramethylbenzene, 2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)phenol; triazine compounds, such as, for example, 2,4-bis(octylmercapto)-6-(3,5-diíerc-butyl-4-hidroxian¡l¡no)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-d¡-íerc-but¡l-4hidroxianilino)-1,3,5-triazine, 2-octylmercapto-4,6-bis(3,5-d¡-íerc-but¡l-4hidroxyfenox¡)-1,3,5-triazine, 2,4,6-tr¡s(3,5-d¡-íerc-butyl-4-h¡drox¡fenox¡)-1,2,3triazine, isocyanurate de 1,3,5-tris(3,5-d¡-tert-but¡l-4-hidroxybenc¡lo), 1,3,5-tris(4-tert-but¡l-3-h¡drox¡-2,6-d¡met¡lbencilo isocyanurate), 2,4,6-ths(3,5-di-íerc-but¡l-4hidrox¡phenylet¡l)-1,3,5-triazine, 1,3,5-tris(3,5-d¡-íerc-but¡l-4hidrox¡phen¡lpropion¡l)hexah¡dro-1,3,5-triazine, 1,3,5-tris(3,5dicyclohexyl-4-hidroxybencilo isocyanurate); benzylphosphonates, such as, for example, dimethyl-2,5-di-tert-butyl-4-hydroxybenzyl phosphonate, diethyl-3,5-di-tert-butyl-4-hydroxybenzyl phosphonate, doctadecyl-3,5-di-tert-butyl-4-hydroxybenzyl phosphonate, dioctadecyl-5-tert-butyl-4-hydroxy-3-methylbenzyl phosphonate, 3,5-di-tert-butyl-4-hydroxybenzylphosphonic acid monoethyl ester calcium salt; acylaminophenols, such as, for example, 4-hydroxylauranilide, 4-hydroxystearanilide, octyl-N-(3,5-di-tert-butyl-4-hydroxyphenyl) carbamate; 3-(3,5-d¡-tert-but¡l-4-hydroxy¡phenyl)propionic acid esters with mono- or polyhydroxy alcohols, for example, methanol, ethanol, n-octanol, ¡-octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentylglycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3czfrQnn / Lznz / e / YiAi thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-l-phospha-2,6,7-trioxabicyclo[2.2.2]octane; esters of 3-(5-tert-butyl-4-hydroxy-3-methylphenyl)propionic acid with mono- or polyhydroxy alcohols, for example methanol, ethanol, n-octanol, i-octanol, octadecanol, 1,6-hexanediol, 1,9-nonanediol, ethylene glycol, 1,2-propanediol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-bis(hydroxyethyl)oxamide, 3-thiaundecanol, 3-thiapentadecanol, trimethylhexanediol, trimethylolpropane, 4-hydroxymethyl-1-phospha-2,6,7-trioxabicyclo[2.2.2]octane, 3,9-bis[2-{3-(3-ert-butyl-4-hydroxyl-5methylphenyl)propionyloxy}-1,1-dimethylethyl-2,4,8,10-tetraoxaespiro[5.5]undecane; esters of p-(3,5-dicyclohexyl-4-hydroxyphenyl)propionic acid with mono- or polyhydroxy alcohols, for example 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; acid esters (3,5-d¡-íe / 'c-but¡l-4-hydroxy¡phen¡l)acetic acid with polyhydroxyl monoalcohols, e.g., methanol, ethanol, octanol, octadecanol, 1,6hexanodiol, 1,9-diol, ethylene, ethylene 1,2-propanodiol, neopentyl glycol, thiodiethylene glycol, diethylene glycol, triethylene glycol, pentaerythritol, tris(hydroxyethyl) isocyanurate, N,N'-bis(hydrox¡et¡l)oxam¡da, 3-thiaundecanol, 3-hexadenodecanol, tri trimethylolpropane, 4-hydroxy¡methyl-1 -phospha-2,6,7trioxabicyclo[2.2.2]octane; amides of p-(3,5-di-tert-butyl-4-hydroxy¡phenyl)propionic acid, such as, for example, N,N'-bis(3,5-di-ierc-but¡l-4-hydroxy¡phen¡lpropion¡l)hexameth¡lend¡amda, N,N'b¡s(3,5-d¡-ierc-but¡l-4-hydrox¡phen¡lprop¡on¡l)hexameth¡lend¡am¡a, N,N'-bis(3,5-di-ierc-but¡l-4-h¡drox¡phen¡lprop¡on¡am¡am¡am¡ N,N'-bis(3,5-di-ferc-but¡l-4hydroxyphenylpropionyljhydracide, N,N'-bis[2-(3-[3,5-di-íerc-but¡l-4hydroxy¡phen¡l]prop¡on¡lox¡)et¡l]oxamide (Nado X-1®, commercially available); ascorbic acid (vitamin C). Especially preferred phenolic antioxidants are the following structures: czfrQnn / Lznz / e / YiAi czfrQnn / Lznz / e / γΐΛΐ czfrQnn / Lznz / e / γΐΛΐ czfrQnn / Lznz / e / YiAi czfrQnn / Lznz / e / YiAi Especially preferred phenolic antioxidants are octadec¡l-3-(3,5-d¡-ierc-but¡l-4-hydroxyphenol) propionate and tetraqu¡s(3-(3,5-d¡-ierc-butyl-4hydroxyphenol) pentatolic pentatol. Other preferred phenolic antioxidants are phenolic antioxidants based on renewable raw materials, such as, for example, tocopherols (vitamin E), tocotrienols, tocomonoenols, carotenoids, hydroxytyrosol, flavonols, such as, for example, chrysin, quercetin, hesperidin, neohesperidin, naringin, morin, kaempferol, fisetin, anthocyanins, such as, for example, delphinidin and malvidin, curcumin, carnosic acid, carnosol, rosmarinic acid, tannin and resveratrol. Very particularly preferably, the phenolic antioxidant pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate or octadecyl 3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate is used as the primary antioxidant. As amino antioxidants, the following can be used, for example: <h2 style=";text-align:left;direction:ltr">Ν,Ν'-di-isopropil-p-fenilendiamina, Ν,Ν'-di-sec-butil-p-fenilendiamina, N,N'b¡ s(1,4-dimet¡lpent¡l)-p-fenilend¡am¡na, N,N'-bis(1 -eti l-3-meti l-penti l)-pfenilendiamina, N,N'-bis(1 -metilheptil)-p-fen¡lend¡am¡na, N,N'-d¡c¡clohex¡l-pfenilendiamina, Ν,Ν'-difenil-p-fenilendiamina, N,N'-bis(2-naft¡l)-p-fen¡lend¡am¡na, Nisopropyl-N'-phenyl-p-phenylendiamina, N-(1,3-dimetlbutl)-N'-fenlp-fenlendiamina, N(1-metlheptl)-N'-fenlp-fenlendiamina, N-cicIohexil-N'-phenyl-p-phenylendiamina, 4-(ptoluenosulfamoil)difenlamina, N,N'-dmetlN,N'-d-sec-butl-fenlendiamina, diphenylamine, N-alildifenilamina, 4-isopropoxidifenilamina, N-phenyl-1-naftilamine, N(4-terc-octilfenil)-1-naftilamine, N-fenil-2-naftilamina, difenilamina octilada, for example, ρ,ρ'-di-íerc-octildifenilamina, 4-n-butilaminofenol, 4-butirilaminophenol, 4nonanoilaminofenol, 4-dodecanoilaminofenol, 4-octadecanoilaminophenol, bis(4metoxi-fenil)amina, 2,6-d¡-íerc-but¡l-4-d¡metilam¡nomet¡lfenol, 2,4'-d¡aminodifenilmetano, 4,4'-diaminodiphenylmethane, N,N,N',N'-tetramethyl-4,4'-diaminodiphenylmethane, 1,2-bis[(2-methylphenyl)amino]ethane, 1,2-bis(phenylamino)propane, (o-tolyl)biguanide, bis[4-(1 ',3'-dimethylbutyl)-phenyl]amine, tert-octylated N-phenyl-1-naphthylamine, a mixture of mono- and dialkylated erc-butyl / erc-octyldiphenylamines, a mixture of mono- and dialkylated nonyldiphenylamines, a mixture of mono- and dialkylated dodecyldiphenylamines, a mixture of mono- and dialkylated isopropyl / isohexyl-diphenylamines, a mixture of mono- and dialkylated tert-butyldiphenylamines, 2,3-dihydro-3,3-dimethyl-4H-1,4-benzothiazine, phenothiazine, a mixture of mono- and dialkylated erc-butyl / tert-octylphenothiazines, a mixture of mono- and dialkylated erc-octylphenothiazines, Nalylphenothiazine, N,N,N',N'-tetraphenyl-1,4-diaminobut-2-ene, as well as mixtures or combinations thereof. The preferred amino antioxidants are: Ν,Ν'-di-isopropyl-p-phenylenediamine, Ν,Ν'-di-sec-butyl-p-phenylenediamine, N,N'b¡ s( 1,4-dimeth¡lpent¡l)-p-phen¡lenediamine, N,N'-bis(1 -ethyl-phenylenediamine),-phenylenediamine N,N'-bis(1 -methylhept¡l)-p-phen¡lenediamine, N,N'-d¡c¡clohex¡l-phenylenediamine, Ν,Ν'-diphenyl-p-phenylenediamine, N,N'-bis(2-napht¡l)-p-phen¡lendiamine, Nisopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, N(1 -met¡lhept¡l)-N'-phen¡lp-phenylenediamine, N-cicIohexyl-N'-phenylenediamine. Other preferred antioxidants are hydroxylamines or their N-oxides (nitrones) such as, for example, Ν,Ν-dialkylhydroxylamines, Ν,Ν-dibenzylhydroxylamine, N,Ndilaurylhydroxylamine, Ν,Ν-distearylhydroxylamine, N-phenyl-octane, Noctadecyl-oc-hexadecylnitrone, as well as Genox EP (marketed by Addivant) according to the formula: czfrQnn / Lznz / e / Yi / u Rl, Rs = C14-C24 alkyl Preferred lactones are: benzofuranones and indolinones such as, for example, 3-(4-(2-acetoxyethoxy)phen¡l]5,7-di-hierc-butyl-benzofuran-2-one, 5,7-di-hierc-butyl-3-[4-(2-stearoylox¡enethoxy¡)phenyl-zofuran-2,]-benzone 3,3'-bis[5,7-di-ierc-but¡l-3-(4-(2-h¡drox¡ethoxy¡]phenyl)benzofuran-2-one), 5,7-d¡-fe / 'c-but¡l-3-(4-ethoxyphenyl)benzofuran-2-one, 3-(4acetox¡-3,5-d¡methylphen¡l)-5,7-d¡-ierc-but¡l-benzofuran-2-one, 3-(3,5-dimethyl-4p¡valo¡lox¡phen¡l)-5,7-di-ierc-but¡l-zofuran-2-benone, 3-(3,4-dimethylphen¡l)-5,7-d¡-tere16 butyl-benzofuran-2-one, 3-(2,3-d¡met¡l-phenyl)-5,7-d¡-íerc-but¡l-benzofuran-2-one, as well as lactones, which also present a phosphine group, for example czfrQnn / Lznz / e / YiAi Another suitable group of antioxidants are soindole[2,1-A]quinazoline such as, 5 for example, czfrQnn / Lznz / e / YiAi Another preferred variant of the process according to the invention is characterized in that the at least one secondary antioxidant is selected from the group consisting of phosphorus compounds, especially phosphites and phosphonites, organosulfur compounds, especially sulfides and disulfides, as well as mixtures thereof. As phosphites or phosphonites, the following can be used, for example: triphenyl fosphite, diphenylalkyl fosphite, fenildialkyl fosphite, tri(nonylphenyl)fosphite, trilauril fosphite, trioctadecil fosphite, diestarylpentaerythritol difosphite, tns-(2,4-di-erc-butylphenyl)fosphite, diisodecylpentaerythritol difosphite, bis(2,4-d-erc-butylphenyl)pentaertrtol difosphite, bis(2,4-di-cumlfenyl)pentaertrtol difosphite, bis(2,6-di-erc-but¡l-4methylphenyl)pentaer¡tr¡tol, düsodecyloxypentaerythritol diphosphite, bis(2,4-d¡terc-butyl-6-met¡lphenyl)pentaerythr¡tol diphosphite, diphosphite bis(2,4,6-tris(tercbutylphenyl)pentaer¡tr¡tol, trifosfito de triestearylsorbitol, diphosphonito de tetraquis(2,4-d¡íe / 'c-butylphenyl)-4,4'-b¡phen¡leno, 6-isooctylox¡-2,4,8,10-tetra-íerc-butyl-12H-dibenz[d,g]1,3,2-dioxaphosphocin, bis(2,4-di-erc-butyl-6-methylphenyl)ethyl phosphite, bis(2,4-d¡-erc-butyl-6-methylphenyl)ethyl phosphite, 6-fluoro-2,4,8,10-tetra-terc-butyl-12-methyldibenz-[d,g]-1,3,2-dioxaphosphocin, 2,2' phosphite,2-nitrilo[triethyltris(3,3,5,5'-tetratert-butyl-1,1'-biphenyl-2,2'-diyl)], 2-ethylhexyl(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2,2'-diyl)) phosphite, 5-butyl-5-ethyl-2-(2,4,6-tri-tert-butyl-phenoxy)-1,3,2-dioxaphosphirane., Particularly preferred phosphites / phosphonites are: czfrQnn / Lznz / e / Yi / u czfrQnn / Lznz / e / YiAi Tris-(2,4-di-tert-butylphenyl) phosphite is particularly preferably used as a secondary antioxidant. The preferred sulfur compounds are: distearyl thiodipropionate, dilauryl thiodipropionate; ditridecyl dithiopropionate, ditetradecyl thiodipropionate, 3-(dodecylthio)-1,1'-[2,2bis[[3-(dodecylthio)-1-oxopropoxy]methyl]-1,3-propanediyl]propanoic acid ester. With particular preference, sulfur compounds with the following structures are used: so ( S .....C — O—CKj C If both a primary and a secondary antioxidant are used in the process, it is preferred that component (B) (primary antioxidant) is a phenolic antioxidant and component (C) (secondary antioxidant) is a phosphite or phosphonite. In another preferred embodiment, components (B) and (C) are made of a renewable raw material. According to another preferred variant of the process according to the invention, component (A) is incorporated into the recycled halogen-free thermoplastic plastic product in a weight ratio with respect to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, particularly preferably 60:40 to 40:60. It is furthermore advantageous if, in each case based on the sum by weight of the recycled plastic product and components (A) to (C), from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, particularly preferably from 0.02 to 0.50% by weight, in particular from 0.10 to 0.30% by weight, of the at least one compound (A) capable of reacting with carbonite groups, as well as from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, particularly preferably from 0.02 to 0.50% by weight, in particular from 0.05 to 0.20% by weight, of the at least one primary antioxidant (B) and / or from 0.02 to 3.00% by weight, preferably from 0.03 to 0.50% by weight, in particular from 0.05 to 0.20% by weight, are incorporated into the halogen-free thermoplastic recycled product. 1.00% by weight, particularly preferably 0.02 to 0.50% by weight, especially 0.05 to 0.20% by weight of the at least one secondary antioxidant (C). The components (A) and (B) and / or (C) can be incorporated into the halogen-free thermoplastic recycled product in such a way that the components (A) and (B) and / or (C) present as solid are mixed with the halogen-free thermoplastic recycled product present as solid and the mixture formed in this case is melted and subsequently cooled, or the components (A) and (B) and / or (C) present as solid are melted and the melt formed in this case is incorporated into a melt of the halogen-free thermoplastic recycled product. Preferably, components (A), (B), and / or (C), which may be in the form of powder, compacted, granulated, in solution, or in flakes, are mixed with the polymer to be stabilized, the polymer matrix is ​​transferred into the molten mass and then cooled. Alternatively, it is also possible to incorporate the additive in a molten liquid state into a polymer melt. The halogen-free thermoplastic recycled product is preferably from the group consisting of (a) recycled olefin or diolefin polymers, such as, for example, polyethylene, in particular LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methyl-pent-1-ene, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers, and corresponding copolymers in the form of random or block structures, such as, for example, polypropylene-polyethylene (EP), EPM or EPDM, ethylene-vinyl acetate (EVA), ethylene-acrylic esters, such as, for example, ethylene-butyl acrylate, ethylene-acrylic acid-glycidyl acrylate, and corresponding graft polymers, such as, for example, polypropylene-g-maleic anhydride, polypropylene-g-acrylic acid and polyethylene-g-acrylic acid, (b) recycled 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, and graft copolymers of methyl methacrylate, styrene-butadiene and ABS (MABS), c) recycled polymers of unsaturated esters such as, for example, polyacrylates and polymethacrylates such as poly(methyl methacrylate) (PMMA), poly(butyl acrylate), poly(lauryl acrylate), poly(stearyl acrylate, polyacrylonitrile, polyacrylamides and corresponding copolymers such as, for example, polyacrylonitrile-poly(alkyl acrylate), d) recycled polymers of unsaturated alcohols and derivatives, such as, for example, polyvinyl alcohol, polyvinyl acetate, polyvinyl butyral, e) recycled polyacetalene, such as polyoxymethylene (POM), and corresponding copolymers, such as copolymers with butanal, f) recycled poly(phenylene oxides) and mixtures thereof with polystyrene or polyamides, g) recycled polymers of cyclic ethers such as, for example, polyethylene glycol, polypropylene glycol, polyethylene oxide, polypropylene oxide, h) recycled polyurethanes from hydroxy-terminated polyethers or polyesters and aromatic or aliphatic isocyanates, especially linear polyurethanes, polyureas, (i) recycled polyamides such as, for example, polyamide-6, 6.6, 6.10, 4.6, 4.10, 6.12, 12.12, polyamide 11, polyamide 12, and (semi)aromatic polyamides such as, for example, polyphthalamides, for example, produced from terephthalic acid and / or isophthalic acid and aliphatic diamines or from aliphatic dicarboxylic acids such as, for example, adipic acid or sebacic acid and aromatic diamines such as, for example, 1,4- or 1,3-diaminobenzene, j) recycled polyimides, polyamide-imides, polyetherimides, polyesterimides, poly(ether)ketones, polysulfones, polyethersulfones, polyarylsulfones, poly(phenylene sulfide), polybenzimidazoles, polyhydantoins, k) recycled polyesters of dicarboxylic acids and aliphatic or aromatic diols or of hydroxycarboxylic acids such as, for example, poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly(propylene terephthalate), poly(ethylene naphthylate), poly(1,4-dimethylcyclohexane terephthalate), polyhydroxybenzoate, polyhydroxynaphthalate, polylactic acid, I) recycled polycarbonates, polyester carbonates, as well as mixtures of these, such as PC / ABS, PC / PBT, PC / PET / PBT, (m) recycled cellulose derivatives, such as, for example, cellulose nitrate, cellulose acetate, cellulose propionate, cellulose butyrate, n) as well as mixtures or combinations of two or more of the aforementioned polymers. In the event that other constituents are introduced into the halogen-free thermoplastic recycled product, these may 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 previously described. Preferably, at least one additive may additionally be incorporated into the halogen-free thermoplastic recycled product, which additive is selected from the group consisting of UV absorbers, light stabilizers, metal deactivators, charge deactivators, antiozonants, nucleating agents, antinucleating agents, impact resistance improving agents, plasticizers, lubricants, rheology modifiers, thixotropic agents, chain extenders, optical brighteners, antimicrobial active ingredients (e.g. biocides), antistatic agents, glidants, anti-caking agents, coupling agents, crosslinkers, branching agents, anti-crosslinkers, hydrophilizing agents, hydrophobizing agents, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, blowing agents, degradation additives, antifoams, odor scavengers, tracers, antifogging agents,Additives for increasing electrical conductivity and / or thermal conductivity, infrared absorbers or infrared reflectors, gloss enhancers, tarnishing agents, repellents, fillers, reinforcing substances and mixtures thereof. Furthermore, it is preferred that at least one additive, which is selected from the group consisting of: a) acid sequestrants, preferably calcium stearate, magnesium stearate, zinc stearate, aluminum stearate, calcium stearate, calcium lactate, calcium stearoyl-2-lactate, hydrotalcite, especially synthetic hydrotalcites based on aluminum, magnesium and zinc, hydrocalumites, zeolites, alkaline earth oxides, especially calcium oxide and magnesium oxide, carbonates alkaline earth metals, especially calcium carbonate, magnesium carbonate and dolomite, and hydroxides, especially brucite, b) light stabilizers, preferably light stabilizers from the group of hindered amines, which can at the same time act as long-term thermal stabilizers c) dispersants, d) charge deactivators, and mixtures thereof. Suitable light stabilizers are, for example, compounds based on 2-(2'-hydroxyphenyl)benzotrazoles, 2-hydroxybenzophenones, benzoic acid esters, acrylates, oxamides and 2-(2-hydroxyphenyl)-1,3,5-triazines. Suitable 2-(2'-hydroxyphen¡l)benzotrazoles are, for example, 2-(2'hydroxy-5'methlphen¡l)benzotrazole, 2-(3',5'-d¡-tert-but¡l-2'-h¡drox¡l)benzotrazole) 2(5'-ierc-butyl-2'-hydroxy-phen¡l)benzotr¡azole, 2-(2'-hydroxy¡-5'-(1,1,3,3tetramethylbutyl)phen¡l)benzotr¡azole, 2-(3',5'-di-íerc-butyl-2'-h¡droxiphen¡l)-5chlorobenzotriazole, 2-(3'-íe / 'c-but¡l-2'-hydrox¡-5'-meth¡lphen¡l-5-chlorobenzotr¡azole, 2-(3'sec-but¡l·5'-terc-but¡l-2'-h¡drox¡-phen¡l)benzotriazole, 2-(2'-hydrox¡-4'octyloxyphen¡l)benzotriazole, 2-(3',5'-d¡-íerc-am¡l-2'-h¡droxyphenyl)benzothazole, 2-(3',5'b¡s(oc,a-dimet¡lbenc¡l)-2'-h¡drox¡phen¡l)benzotr¡azole, 2-(3'-tert-butyl-2'-hydroxy¡-5'-(2octylox¡carbon¡letyl)phen¡l)-5-chlorobenzot¡azole, 2-(3'-ferc-butyl-5'-[2-(2-et¡lhex¡lox¡)carbonylethyl]-2'-hydrox¡phen¡l)-5-chlorobenzotr¡azole, 2-(3'-ierc-butyl-2'-hydroxy-5'-(2methoxycarbon¡let¡l)phen¡l)-5-chlorobenzotriazole, 2-(3'-terc-butyl-2'-hydroxy-5'-(2methoxycarbon¡let¡l)phenotr¡azole,2-(3'-tert-butyl-2'-h¡droxy-5'-(2octylox¡carbon¡lethyl)phen¡l)benzotriazole, 2-(3'-terc-butyl-5'-[2-(2-et¡lhex¡lox¡)carbon¡let¡l]2'-tripazole, 2-(3'-dodecyl-2'-h¡drox¡-5'-methylphen¡l)benzotriazole, 2-(3'terc-but¡l·2'-h¡drox¡-5'-(2-¡sooct¡lox¡carbon¡let¡l)phen¡lbenzol,azole 2,2'-methyleneb¡s[4(1,1,3,3-tetramethylbut¡l)-6-benzotriazole-2-lphenol] the transesterification product of; 2-[3'-ierc-butyl-5'-(2-methoxycarbon¡lethyl)-2'-h¡drox¡phen¡l]-2H-benzotriazole with polyethylene glycol 300 [R—CH2CH2—COO—CH2CH2]2, in which R =; 3'-ierc-butyl-4'hydroxy-5'-2H-benzotriazole-2-¡lphen¡lo, 2-[2'-hydroxy-3'-(oc,ad¡met¡lbenc¡l)-5'-(1,1,3,3tetramethylbutyl)-phen¡l]benzotriazole,¡¡ 2-[2'-hydrox¡-3'-(1,1,3,3-tetramethylbut¡l)-5'-(a,otdimethylbenc¡l)phen¡l]benzotriazol., The suitable 2-hidroxibenzofenonas are, for example, derived from 4hidroxi-, 4-metox¡-, 4-octiloxi-, 4-deciloxi-, 4-dodeciloxi, 4-benciloxi, 4,2',4'czfrQnn / Lznz / e / YiAi trihidroxi- y 2'-hidrox¡-4,4'-dimet¡ox¡- de 2-hidroxybenzofenonas. Suitable acrylates are, for example, ethyl a-cyano-pp-diphenyl acrylate, iso-octyl a-cyano-p,3-diphenyl acrylate, methyl α-carbomethyl acrylate, methyl oc-cyanoβ-methyl-p-methyl acrylate, butyl oi-cyano-p-methyl-p-methyl acrylate, otcarbomethoxi-p-metoxicinamate de methyl y N-(3-carbomethoxi-3-cyanovin¡l)-2methylindoline. Suitable benzoic acid esters are, for example, 4-tert-butylphenyl salicylate, phenyl salicylate, octylphenyl salicylate, dibenzoylresorcinol, bis(4-tert-butylbenzoyl)resorcinol, benzoylresorcinol, 3,5-di-ert-butyl-4hydroxybenzoate. 2,4-di-tert-butylphenyl, hexadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, octadecyl 3,5-di-tert-butyl-4-hydroxybenzoate, 2-methyl-4,6-di-tert-butylphenyl 3,5-di-tert-butyl-4-hydroxybenzoate. Suitable oxamides are, for example, 4,4'-dioctyloxyoxanilide, 2,2'-diethoxyoxanilide, 2,2'-dioctyloxy-5,5'-di-tert-butoxanilide, 2,2'-didodecyloxy-5,5'-di-tert-butoxanilide, 2-ethoxy-2'-ethyloxanilide, N,N'-bis(3-dimethylaminopropyl)-oxamide, 2-ethoxy-5-tert-butyl-2'-ethoxanilide and mixtures thereof with 2-ethoxy-2'-ethyl-5,4'-di-tert-butoxanilide, mixtures of o- and p-methoxy-disubstituted oxanilides and mixtures of o- and p-methoxy-disubstituted oxanilides. p-ethoxy¡. Suitable 2-(2-hydroxyphenyl)-1,3,5-triazines are, for example, 2,4,6-tris(2hydroxy-4-oct¡lox¡phenyl)-1,3,5-triazine, 2-(2-hydrox¡-4-oct¡loxiphen¡l)-4,6-b¡s(2,4dimethylphen¡l)-1,3,5-triazine, 2-(2,4-dihydrox¡phen¡l)-4,6-bis(2,4-d¡methlphenyl)-1,3,5,5,triazine 2,4-b¡s(2-hydroxy-4-propyloxyphenyl)-6-(2,4-d¡met¡lphen¡l)-1,3,5-triazine, 2-(2h¡drox¡-4-oct¡lox¡phenyl)-4,6-bis(4-methylphen¡l-1,5,3,3,3,azine 2-(2-hydroxy¡-4dodecylox¡phen¡l)-4,6-b¡s(2,4-d¡methylphen¡l)-1,3,5-triazine, 2-(2-hydroxy¡-4tridecyloxyphenyl)-4,6-bis(2,4-dimethylphenyl)-1,3,5,5,triazine 2-[2-hydroxy-4-(2-hydroxy¡-3butyloxy¡propox¡)-phen¡l]-4,6-b¡s(2,4-dimeth¡l)-1,3,5-triazine, 2-[2-hydroxy-4-(2-h¡drox¡-3octylox¡prop¡lox¡)phen¡l]-4,6-b¡s(2,4-d¡met¡l)-1,3,5-triazine, 2-[4-(dodecyl-oxy / tr¡decyloxy2-hydroxypropox¡)-2-h¡drox¡phen¡l]-4,6-b¡s(2,4-d¡met¡l-phen¡l)-1,3,5-triazine, 2-[2-hydroxy4-(2-h¡drox¡-3-dodec¡lox¡propox¡)-phen¡l]-4,6-bis(2,4-d¡met¡lphen¡l-1,3,5-triazine, 2-(2h¡drox¡-4-hex¡lox¡)-phen¡l-4,6-d¡phen¡l-1,3,5-triazine,2-(2-hydroxy-4-methoxy¡phen¡l)-4,6dipheny 1-1,3,5-triazine, 2,4,6-tris[2-h¡drox¡-4-(3-butoxy¡-2-h¡droxypropoxy)-phenyl]-1,3,5triazine, 2-(2-hydroxy¡phen¡l)-4-(4-methoxyphen¡l)-6-phen¡l-1,3,5-triazine, 2-{2-hydroxy¡-4-[3(2-ethylhexyl-1 -ox¡)-2-h¡drox¡prop¡lox¡]-phen¡l}-4,6-bis(2,4-d¡met¡lphen¡l-1,3,5-triazine., Suitable metal deactivators are, for example, N,N'czfrQnn / Lznz / e / YiAi diphenyloxamide, N-salicylal-N'-salicyloylhydracin, N,N'-bis(salic¡lo¡l)hydrac¡na, N,N'b¡s(3,5-d¡-íerc-but¡l-4-h¡drox¡phen¡lprop¡on¡l)h¡dracine, 3-salicylo¡lam¡no-1,2,4-triazole, bis(ben¡l¡den)oxalhydride, oxalide isophthaloyldihydracide, sebacoylbisphenylhydracide, Ν,Ν'-diacetyladipoyldihydracide, N,N'bis(sal¡c¡loyl)ox¡l¡ld¡h¡drac¡da, N,N'-b¡s(salic¡loyl) The suitable prevented aminos, which can be used at the same time as large-scale thermal stabilizers, are, for example, 1,1b¡s(2,2,6,6-tetramethyl-4-piper¡dlo) succinate, bis(1,2,2,6,6-pentamethyl-4piperidyl) sebacate, bis(1-octilox¡-2,2,6,6-tetramet¡l-4-piper¡d¡lo), 1c¡clohex¡lox¡-2,2,6,6-tetramet¡l-4-octadec¡lam¡nop¡per¡d¡na, sebacato de bis(1 -acyl2,2,6,6-tetramethylpiper¡d¡n-4-ilo), 1 -(2-hidrox¡-2-met¡lpropoxy)-4-hidrox¡-2,2,6,6tetramethylpiperidine, 1 -(2-hidrox¡-2-methylpropox¡)-4-oxo-2,2,6,6-tetramet¡lp¡perid¡na, succinato de bis(1-oct¡lox¡-2,2,6,6-tetramet¡lp¡perid¡lo), N,N'-bis-formyl-N,N'b¡s(2,2,6,6-tetrameth¡l-4-piperidyl)hexamethylene diam¡na, (33a) carbonate de bis(1 undecaniloxy-2,2,6,6-tetramethylp¡peridin-4-¡lo), 1,2,2,6,6-pentamethyl-4-aminopiperidine, 2-undecyl-7,7,9,9-tetramethyl-1 -oxa-3,8-diaza-4-oxoespiro[4.5]decane, tr¡s(2,2,6,6-tetramethyl-4-p¡pendyl) nitrilotriacetate, 1,1'-(1,2ethanediyl)-b¡s(3,3,5,5-tetramethylpiperazinone), 3-n-octyl-7,7,9,9-tetramethyl-1,3,8triazaespiro[4.5]decano-2,4-done, 8-acetyl-3-dodecyl-7,7,9,9-tetrame¡l-1,3,8triazaespiro[4.5]decano-2,4-done, 3-1-done -(2,2,6,6-tetramethyl-4p¡peridiI)p¡rrolidine-2,5-dione, 3-dodecyl-1 -(1,2,2,6,6-pentamethyl-4-p¡per¡d¡l)p¡rrolide¡n2,5-dione, malonate of bis(1,2,2,6,6-pentameth¡l-4-p¡pend¡l)-n-but¡l-3,5-d¡-tert-but¡l4-hydroxybenzyl, the condensation product of 1-(2-hydroxyet¡l)-2,2,6,6tetramethyl-4-hydroxydine, and succinic acid products linear or cyclic condensation of N,N'-b¡s(2,2,6,6-tetramet¡l-4-piper¡dyl)hexamethlend¡amine and 4-tert-octylamino-2,6-d¡chloro-1,3,5-triazine, tris(2,2,6,6-tetramethyl-4piperidyl)nitrite lottracetate, tetracarboxylate of tetrakis(2,2,6,6-tetramethyl-4-p¡d¡l)1,2,3,4-butane, '-(1,2-ethane¡l)-b¡s(3,3,5,5-tetramethylpiperazinone), 4-benzoyl2,2,6,6-tetramethylpiperidine, 4-stearylox¡-2,2,6,6-tetra-methane lpiperidine, condensation products of linear cycles N,N'-bis(2,2,6,6-tetramethyl-4piperidyl)hexamethylenediamine and 4-morpholino-2,6-dichloro-1,3,5-triazine, the reaction product of 7,7,9,9-tetramethyl-2-cycloundecyl-1-oxa-3,8-diaza-4-oxaespiro[4.5]decane and epichlorohydrin., In this respect, the structures specified above also include, in each case, aesthetically hindered NH, N-alkyl such as N-methyl or N-octyl, N-alkoxy derivatives such as N-methoxy or N-octyloxy, cycloalkyl derivatives such as N-cyclohexyloxy and N-(2-hydroxy-2-methylpropoxy) analogues. The preferred hindered amines also have the following structures: czfronn / Lznz / e / YiAi czfrQnn / Lznz / e / YiAi czfrQnn / Lznz / e / YiAi czfrQnn / Lznz / e / YiAi Preferred oligomeric and polymeric hindered amines have the following structures: czfrQnn / Lznz / e / γΐΛΐ czfrQnn / Lznz / e / Yi / u OHi'r ro czfrQnn / Lznz / e / YiAi ~ Jn VxX N 'n'' H In the previously mentioned compounds, n means respectively 3 to 100. Suitable dispersants are, for example: polyacrylates, for example copolymers with long chain side groups, polyacrylate block copolymers, alkylamides: for example N,N'-1,2-ethanediylbisoctadecanamide sorbitan ester, for example monostearyl sorbitan ester, titanates and zirconates, reactive copolymers with functional groups, for example polypropylene-co-acrylic acid, polypropylene-co-maleic acid anhydride, polyethylene-co-glycidyl methacrylate, polystyrene-maleic acid anhydride-polysiloxanes: for example dimethylsilanediol-ethylene oxide copolymer, polyphenylsiloxane copolymer, amphiphilic copolymers: for example polyethylene-block-polyethylene oxide, dendrimers, for example dendrimers containing hydroxyl groups. Suitable nucleating agents are, for example, talc, alkali metal or alkaline earth salts of mono- and polyfunctional carboxylic acids, such as, for example, benzoic acid, succinic acid, adipic acid, for example, sodium benzoate, zinc glycerolate, aluminum hydroxy-bis(4-tert-butyl)benzoate, benzylidene sorbitols such as, for example, 1,3:2,4-bis(benzylidene)sorbitol or 1,3:2,4-bis(4-methylbenzylidene)sorbitol, 2,2'-methylene-bis-(4,6-di-tertbutylphenyl) phosphate, and also trisamides and diamides such as, for example, trimesic acid tricyclohexylamide, trimesic acid tri(4-methylcyclohexylamide), trimesic acid tri(ercbutylamide), N,N',N-1,3,5-benzenetrimethylamide(2,2-dimethylpropanamide) or 2,6-naphthalenedicarboxylic acid dicyclohexylamide. Suitable antinucleating agents are, for example, azine dyes such as nigrosine, ionic liquids and / or lithium salts. Suitable flame retardants are, for example: a) inorganic flame retardants such as, for example, Al(OH)s, Mg(OH)2, AlIO(OH), MgCOs, layer silicates such as, for example, montmorillonite or sepiolite, unmodified or organically modified double salts, double salts, such as, for example, Mg-Al silicates, POSS compounds (polyhedral oligomeric silsesquioxanes), huntite, hydromagnesite or halloysite, as well as Sb2O3, Sb2Os, MoOs, zinc stannate, zinc hydroxystannate, (b) nitrogen-containing flame retardants such as, for example, melamine, melem, melam, melon, melamine derivatives, melamine condensation products or melamine salts, benzoguanamine, polyisocyanurates, allantoin, phosphazene, in particular melamine cyanurate, melamine phosphate, dimelamine phosphate, melamine pyrophosphate, melamine polyphosphate, metal phosphates of melamine such as, for example, melamine aluminum phosphate, melamine zinc phosphate, melamine magnesium phosphate, and the corresponding pyrophosphates and polyphosphates, poly[2,4-(piperazine-1,4-yl)-6-(morpholin-4-yl)-1,3,5-triazine], ammonium polyphosphate, melamine borate, melamine hydrobromide, c) radical formers, such as alkoxyamines, hydroxylamine esters, azo compounds, sulfenamides, sulfenimides, dicumyl or polycumyl, hydroxyimides and their derivatives, such as hydroxyimide esters or hydroxyimide ethers (d) flame retardants containing phosphorus, such as red phosphorus, phosphates, such as resorcinol diphosphate, bisphenol A diphosphate and their oligomers, triphenyl phosphate, ethylenediamine diphosphate, phosphinates, such as hypophosphoric acid salts and their derivatives, such as alkyl phosphinate salts, such as diethylphosphinate-aluminium or diethylphosphinate-zinc or aluminium phosphinate, aluminium phosphite, aluminium phosphonate, phosphonate esters, oligomeric and polymeric derivatives of methanophosphonic acid, 9,10-dihydro-9-oxa-10-phosphate (DOPO) and its substituted compounds, (e) halogenated flame retardants based on chlorine and bromine, such as, for example, polybrominated diphenyl oxides, such as, for example, decabromodiphenyl oxide, tris(3-bromo-2,2-bis(bromomethyl)propyl) phosphate, tris(tribromoneopentyl) phosphate, tetrabromophthalic acid, 1,2-bis-(tribromophenoxy)ethane, hexabromocyclododecane, brominated diphenylethane, tris(2,3-dibromopropyl) isocyanurate, ethylene-bis-(tetrabromophthalimide), tetrabromobisphenol A, brominated polystyrene, brominated polybutadiene or brominated polystyrene-polybutadiene copolymers, brominated polyphenylene ether, brominated epoxy resin, polypentabromobenzyl acrylate, optionally in combination with SbzO2 and / or SbzOs, f) borates such as zinc borate or calcium borate, optionally on a support material such as silica g) compounds containing sulphur such as elemental sulphur, disulphides and polysulphides, thiuram sulphide, dithiocarbamates, mercaptobenzothiazole and sulfenamides, h) anti-drip agents such as polytetrafluoroethylene, i) compounds containing silicon such as polyphenylsiloxanes, j) carbon modifications such as carbon nanotubes (CNTs), expandable graphite or graphene, k) as well as combinations or mixtures thereof. Suitable plasticizers are, for example, hydroxylic acid esters, adipic acid esters, citric acid esters, 1,2-cyclohexanedicarboxylic acid esters, trimellitic acid esters, isosorbide esters, phosphate esters, epoxides such as epoxidized soybean oil or aliphatic polyesters. Suitable fillers and reinforcing substances are, for example, synthetic or natural materials such as calcium carbonate, silicates, glass fibers, glass spheres (solid or hollow), talc, dolomite, mica, feldspar, kaolin, quartz, wollastonite, calcium sulfate, barium sulfate, silicon carbide, metal oxides and metal hydroxides, aluminum silicate, calcium silicate, zirconium silicate, carbon black, graphite, carbon nanotubes, graphene, sawdust or fibers made from natural products such as cellulose or synthetic fibers. Other suitable fillers are hydrotalcites or zeolites or layered silicates such as montmorillonite, bentonite, beidellite, mica, hectorite, saponite, vermiculite, ledikite, magadite, lilite, kaolinite, wollastonite, attapulgite. Suitable pigments can be of inorganic or organic nature. Inorganic pigments are, for example, titanium dioxide, zinc oxide, zinc sulfide, iron oxide, ultramarine, carbon black, organic pigments are, for example, anthraquinones, anthranthrones, benzimidazolones, quinacridones, quinophthlones, diketopyrrolopyrroles, dioxazines, indanthrones, isoindolines, isoindolinones, azo compounds, perinones, perylenes, phthalocyanines or pyranthrones. Other suitable pigments are metal-based effect pigments or pearl luster pigments based on metal oxides. Suitable chain extenders for the formation of linear molecular weight polycondensation polymers such as polyesters or polyamides are, for example, diepoxides, bis-oxazolines, bis-oxazolones, bis-oxazines, diisocyanates, dianhydrides, bis-acyl-lactams, bis-maleimides, dicyanates, carbodiimides. Other suitable chain extenders are polymer compounds such as, for example, polystyrene-polyglycidyl polyacrylate(meth)acrylate copolymers, polystyrene-maleic anhydride copolymers and polyethylene-maleic anhydride copolymers. Suitable optical brighteners are, for example, bisbenzoxazoles, phenylcoumarins or bis(styryl)bphenyls and especially optical brighteners of the formulae: czfronn / Lznz / e / YiAi Suitable charge deactivators are, for example, polysiloxanes, polyacrylates, in particular block copolymers such as poly(methacrylic acid)5 poly(alkylene oxide) or polyglycidyl (meth)acrylates and their copolymers, for example with styrene, as well as epoxides, for example, of the following structures: A f 1 TAA o é '^Lv $ vZz® ' ¿h5* 4¾ V Jft tW ^0 O<¿< NXCH^€^— \ / ->-Άί ° ΐ?^3 i « « <aSuitable antiestáticos are, for example, ethoxylated alquilamines, fatty acid esters, alkyl sulphonates and polymers such as, for example, 5 polytheramides. The appropriate antiozonants are the amines previously mentioned as, for example, Ν,Ν'-di-isopropyl-p-phenylenediamine, N,N'-d¡-sec-but¡l-pphenylenediamine, N,N'-bis(1,4-dimethylpent¡l)-p-phen¡lend¡am¡na, N,N'-d¡c¡clohex¡l-pphenylenediamine, N-isopropyl-N'-phenyl-p-phenylenediamine, N-(1,3-dimet¡lbutil)-N'-phen¡l-p10 phenylenediamine, N-(1-met¡lhept¡l)-N'-phenyl-p-phen¡lend¡am¡na, N-cycIohexyl-N'-phenyl-p40 phenylenediamine. Suitable additives for increasing electrical conductivity include, for example, the antistatic agents mentioned above, carbon powders, carbon compounds such as carbon nanotubes and graphene, metal powders such as copper powder, and conductive polymers such as polypyrroles, polyanilines, and polythiophenes. Suitable additives for increasing thermal conductivity include, for example, aluminum nitrides and boron nitrides. Suitable release aids are, for example, silicones, soaps and waxes such as montana waxes. The incorporation of components (A) and (B), as well as, where appropriate, further additives, into the recycled plastic product can take place by conventional processing methods, in which the polymer is melted and mixed with the additive composition according to the invention and any further additives, preferably using a mixer, kneader, and extruder. Preferred processing machines are extruders such as, for example, single-screw extruders, twin-screw extruders, planetary roller extruders, ring extruders, or co-kneters, which are preferably provided with vacuum degassing. In this case, processing can be carried out in air or, where appropriate, under inert gas conditions, for example, under nitrogen. Furthermore, components (A), (B) and / or (C) can be manufactured or incorporated in the form of so-called masterbatches or concentrates, which contain in a polymer, for example, 10-90 % of a stabilizer composition consisting of components (A), (B), and / or (C). In a second aspect, the present invention relates to a plastic composition containing or consisting of (A) at least one compound capable of reacting with carbonyl groups, in combination with (B) at least one primary antioxidant and / or (C) at least one secondary antioxidant, in a recycled halogen-free thermoplastic plastic product, wherein the plastic composition is free of alditols and cyclitols. All preferred embodiments and aspects mentioned above in connection with the method according to the invention also apply without restriction to the previously described plastic composition. A preferred embodiment provides that component (A) is contained in the plastic composition in a weight ratio to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, particularly preferably 60:40 to 40:60. Furthermore, it is advantageous if, in each case, based on the sum by weight of the recycled plastic product and the components (A) to (C), from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, particularly preferably from 0.02 to 0.50% by weight, in particular from 0.10 to 0.30% by weight of the at least one compound (A) capable of reacting with carbonyl groups, and from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, particularly preferably from 0.02 to 0.50% by weight, in particular from 0.05 to 0.20% by weight of the at least one primary antioxidant (B) and / or from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, particularly preferably from 0.10 to 0.30% by weight, are contained. 0.02 to 0.50% by weight, especially 0.05 to 0.20% by weight of the at least one secondary antioxidant (C). Furthermore, it is advantageous that at least one compound (A) capable of reacting with carbonyl groups, at least one primary antioxidant (B) and at least one secondary antioxidant (C) are contained. In the case of at least one halogen-free thermoplastic recycled product, this is in particular a halogen-free thermoplastic recycled product, a polyolefin recycled product, in particular a polypropylene or polyethylene recycled product. The previously presented plastic composition is specially manufactured with a process according to the invention described at the beginning. The invention further relates to molding compositions or a molded part which can be produced from the previously described plastic composition. Preferred embodiments of the molding composition or the molded part provide injection molded parts, films, films, varnishes, coatings, foams, fibers, cables, tubes, profiles, hollow bodies, tapes, membranes, for example geomembranes, lubricants, dyes and / or adhesives, which are produced by extrusion, injection molding, blow molding, calendering, pressing processes, spinning and / or rotational molding processes, for example, for the electrical industry, for the construction industry, for the transport industry, for medical applications, for household and electrical appliances, for vehicle parts, for consumer goods, for packaging, for furniture and / or for textiles. Furthermore, the present invention relates to a stabilizer composition for the stabilization of halogen-free thermoplastic recycled plastic products against oxidative, thermal and / or actinic degradation, consisting of (A) at least one compound capable of reacting with carbonyl groups, in combination with (B) at least one primary antioxidant and / or (O) at least one secondary antioxidant, wherein the stabilizer composition is free of alditols and cyclitols. A preferred embodiment relating to the stabilizer composition provides that component (A) is contained in the plastic composition in a weight ratio to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, particularly preferably 60:40 to 40:60. The stabilizer composition consists especially of at least one compound (A) capable of reacting with carbonyl groups, at least one primary antioxidant (B) and at least one secondary antioxidant (C). Furthermore, it is advantageous if the stabilizer composition consists of (A) from 90.00 to 10.00% by weight or from 80.00 to 20.00% by weight, preferably from 60.00 to 40.00% by weight of at least one compound capable of reacting with carbonyl groups, with the exception of alditols and cyclitols, in combination with (B) from 10.00 to 90.00% by weight, preferably from 20.00 to 30.00% by weight of at least one primary antioxidant and / or (C) from 10.00 to 90.00% by weight, preferably from 20.00 to 30.00% by weight of at least one secondary antioxidant. Furthermore, the present invention relates to the use of the previously described stabilizer composition for the stabilization of halogen-free thermoplastic recycled plastic products against oxidative, thermal and / or actinic degradation. czfrQnn / Lznz / e / Yi / u Suitable compounds (C) are preferably chosen such that they are non-volatile or only slightly volatile at the usual processing temperatures for polymers. Typical processing temperatures for preferred recycled polyolefin products are, for example, between 180°C and 250°C. The present invention is explained by the following examples, without limiting the invention to the special parameters represented. To test the effect of the inventive stabilizer composition, a recycled polypropylene product from battery box regrind (supplier: BSB Braubach) is circularly extruded into the melt at 210°C in a twin-screw micro-extruder (MC 5, manufacturer DSM) in continuous operation at 90 rpm for 30 minutes. After 10, 20, and 30 minutes, respectively, the force input is measured. Force is a measure of the melt toughness and thus of the molecular weight. The higher the residual strength (after a melting time of 2 minutes = 100%), the lower the polymer degradation. czfrQnn / Lznz / e / YiAi Table 1: Stabilization of the recycled polypropylene product Post-stabilization Residual strength after 10 / 20 / 30 minutes [%] Comparative example 1 Without additive 81 / 62 / 44 Comparative example 2 0.1% AO-1 + 0.1% P-1 94 / 91 / 82 Example according to the invention 1 0.1% AO-1 + 0.1% P-1 + 0.2% hydantoin 96 / 95 / 94 AO-1: pentaerythritol tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate P-1: ths-(2,4-di-tert-butylphenyl) phosphite In the present test, the synergistic combination according to the invention turns out to be superior to the synthetic commercial synergistic combinations of AO-1 and P-1 (Comparative Example 1), since less polymer degradation takes place during the time of the experiment. Table 2: Stabilization of the recycled polypropylene product Additive Residual strength after 30 minutes [%] Comparative example 3 Without 45 Inventive example 2 0.1% AO-1 + 0.1% P-1 + 0.2% octadecanethiol 84 Inventive example 3 0.1% AO-1 + 0.1% P-1 + 0.2% thiohydantoin 93 Inventive example 4 0.1% AO-1 + 0.1% P-1 + 0.2% poly(vinyl alcohol-covinyl acetate) 95 Inventive example 5 0.1% AO-1 + 0.1% P-1 + 0.2% poly(2-hydroxyethyl methacrylate) 88 czfrQnn / Lznz / e / Yi / u The polyvinyl alcohol-co-vinyl acetate used is made up of 80% polyvinyl alcohol and has a molecular weight between 9000 and 10000. The compositions according to the invention show lower polymer degradation (higher residual strength) and therefore improved polymer stabilization.

Claims

1. A process for stabilizing recycled halogen-free thermoplastic products against oxidative, thermal and / or actinic degradation, wherein (A) at least one compound capable of reacting with carbonyl groups is incorporated in combination with (B) at least one primary antioxidant and / or (C) at least one secondary antioxidant, in a recycled halogen-free thermoplastic product, wherein neither alditols nor cyclitols are used.

2. Process according to claim 1, characterized in that the at least one compound capable of reacting with carbonyl groups is selected from the group consisting of aliphatic primary amines, aliphatic secondary amines, thiols, hydroxylamine ethers, hydroxylamine esters, hydrazines, oligomers or polymers with an alcohol group attached to aliphatic carbons such as poly(vinyl alcohols) and their copolymers with vinyl acetate, polyhydroxy(meth)acrylates, hydantoins and thiohydantoins.

3. A process according to any one of the preceding claims, characterized in that the at least one compound capable of reacting with carbonyl groups is selected from the group consisting of laurylamine, stearylamine, hexamethylenediamine, decanediamine, dodecanediamine, dilaurylamine, distearylamine, 1-dodecanthol, 1-hexadecanthol, polycaprolactone tetra-3-mercaptopropionate, poly(vinyl alcohol) with a weight average molecular weight of 1.000 to 50.000 g / mol, polyhydroxy(meth)acrylates with a weight average molecular weight of 1.000 to 50.000 g / mol, imidazolidin-2,4-dione, as well as compounds with the following structures: czfrQnn / Lznz / e / Yi / u czfrQnn / Lznz / e / Yi / u Q Ó G Oh ko^»CH-CH SH O 4. A process according to any of the preceding claims, characterized in that the at least one primary antioxidant (B) is selected from the group consisting of phenolic antioxidants, lactones, hydroxylamines and mixtures thereof.

5. A process according to any of the preceding claims, characterized in that the at least one secondary antioxidant (C) is selected from the group consisting of phosphorus compounds, especially phosphites and phosphonites, organosulfur compounds, especially sulfides and disulfides, as well as mixtures thereof.

6. A process according to any of the preceding claims, characterized in that at least one compound (A) capable of reacting with carbonyl groups, at least one primary antioxidant (B) and at least one secondary antioxidant (C) are incorporated into the halogen-free thermoplastic recycled product.

7. A method according to any of the preceding claims, characterized in that component (A) is incorporated into the recycled halogen-free thermoplastic product in a weight ratio to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, with particular preference 60:40 to 40:

60.

8. A process according to any one of the preceding claims, characterized in that, in each case referring to the sum by weight of the recycled plastic product and of component (A) to (C), the recycled halogen-free thermoplastic product incorporates from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, especially preferably from 0.02 to 0.50% by weight, especially from 0.10 to 0.30% by weight of at least one compound (A) capable of reacting with carbonyl groups, as well as from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, especially preferably from 0.02 to 0.50% by weight, especially from 0.05 to 0.20% by weight of at least one primary antioxidant (B) and / or from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, especially preferably 0.02 to 0.50% by weight, especially 0.05 to 0.20% by weight of at least one secondary antioxidant (C).

9. A method according to any one of the preceding claims, characterized in that the components (A), as well as (B) and / or (C), are incorporated into the recycled halogen-free thermoplastic product, in that the components (A), as well as (B) and / or (C), present as solids, are mixed with the recycled halogen-free thermoplastic product present as a solid and the mixture formed therein is melted and then cooled, or the components (A), as well as (B) and / or (C), present as a solid, are melted and the molten mass formed therein is incorporated into a molten mass of the recycled halogen-free thermoplastic product.

10. A process according to any one of the preceding claims, characterized in that the halogen-free recycled thermoplastic product is selected from the group consisting of a) recycled olefin or diolefin polymers, such as, for example, polyethylene, especially LDPE, LLDPE, VLDPE, ULDPE, MDPE, HDPE and UHMWPE, metallocene-PE (m-PE), polypropylene, polyisobutylene, poly-4-methylpent-1-ene, polybutadiene, polyisoprene, polycyclooctene, polyalkylene-carbon monoxide copolymers, and corresponding copolymers in the form of statistical or block structures such as, for example, polypropylene-polyethylene (EP), EPM or EPDM, ethylene-vinyl acetate (EVA), ethylene-acrylic ester, such as, for example, ethylene-butyl acrylate, ethylene-acrylic acid-glycidyl acrylate, and corresponding graft polymers such as, for example, polypropylene-g-maleic anhydride, polypropylene-g-acrylic acid and polyethylene-g-acrylic acid,b) recycled 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, for example, styrene-butadiene, maleic anhydride-SBS or SEBS, as well as graft copolymers of methyl methacrylate, styrene-butadiene and ABS (MABS), c) recycled polymers of unsaturated esters such as, for example, polyacrylates and polymethacrylates such as poly(methyl methacrylate) (PMMA), poly(butyl acrylate), poly(lauryl acrylate), poly(stearyl acrylate), polyacrylonitrile, polyacrylamides and corresponding copolymers such as, for example, polyacrylonitrile-poly(alkyl acrylate),d) recycled polymers of unsaturated alcohols and derivatives, such as, for example, poly(vinyl alcohol), poly(vinyl acetate), polyvinylbutyral, e) recycled polyacethalene, such as, for example, polyoxymethylene (ROM), and corresponding copolymers, such as, for example, copolymers with butanal, f) recycled poly(phenylene oxides) and mixtures thereof with polystyrene or polyamides, g) recycled polymers of cyclic ethers such as, for example, polyethylene glycol, polypropylene glycol, poly(ethylene oxide), poly(propylene oxide), h) recycled polyurethanes from polyethers or polyesters terminated in aromatic or aliphatic hydroxy and isocyanates, especially linear polyurethanes, polyureas, i) recycled polyamides such as, for example, polyamide-6, 6.6, 6.10, 4.6, 4.10, 6.12, 12.12, polyamide 11, polyamide 12, as well as (semi)aromatic polyamides such as, for example, polyphthalamides, for example,manufactured from terephthalic acid and / or isophthalic acid and aliphatic diamines or from aliphatic dicarboxylic acids such as, for example, adipic acid or sebacic acid and aromatic diamines such as, for example, 1,4- or 1,3-diaminobenzene, j) recycled polyimides, polyamide-imides, polyetherimides, polyesterimides, poly(ether)ketones, polysulfones, polyethersulfones, polyarylsulfones, poly(phenylene sulfide), polybenzimidazoles, polyhydantoins, k) recycled polyesters of aliphatic or aromatic dicarboxylic acids and diols or of hydroxycarboxylic acids such as, for example, poly(ethylene terephthalate) (PET), poly(butylene terephthalate) (PBT), poly(propylene terephthalate), poly(naphthylate (ethylene), poly(1,4-dimethylcyclohexane terephthalate), polyhydroxybenzoate, polyhydroxynaphthalate, polylactic acid, (i) recycled polycarbonates, polyestercarbonates, as well as mixtures thereof such as, for example, PC / ABS, PC / PBT, PC / PET / PBT, (m) recycled cellulose derivatives, such as,for example, cellulose nitrate, cellulose acetate, cellulose propionate, cellulose butyrate, n) as well as mixtures or combinations of two or more of the aforementioned polymers.

11. Plastic composition, containing or consisting of (A) at least one compound capable of reacting with carbonyl groups, in combination with (B) at least one primary antioxidant and / or (C) at least one secondary antioxidant, in a halogen-free thermoplastic recycled plastic product, wherein the plastic composition is free of alditols and cyclitols.

12. Plastic composition according to the preceding claim, characterized in that component (A) is contained in the plastic composition in a weight ratio to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, with special preference 60:40 to 40:

60.

13. Plastic composition according to any one of claims 11 to 12, characterized in that, in each case referring to the sum by weight of the recycled plastic product and of component (A) to (C), there are contained from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, especially preferably from 0.02 to 0.50% by weight, especially from 0.10 to 0.30% by weight of at least one compound (A) capable of reacting with carbonyl groups, as well as from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00% by weight, especially preferably from 0.02 to 0.50% by weight, especially from 0.05 to 0.20% by weight of at least one primary antioxidant (B) and / or from 0.02 to 3.00% by weight, preferably from 0.03 to 1.00 % by weight, especially preferably from 0.02 to 0.50% by weight, especially from 0.05 to 0.20% by weight of at least one secondary antioxidant (C).

14. Plastic composition according to any one of claims 11 to 13, characterized in that it contains at least one compound (A) capable of reacting with carbonyl groups, at least one primary antioxidant (B) and at least one secondary antioxidant (C).

15. A plastic composition according to any one of claims 11 to 14, characterized in that the plastic composition further contains at least one additive, which is selected from the group consisting of UV absorbers, photostablets, metal deactivators, charge deactivators, antiozonants, nucleating agents, antinucleating agents, impact-enhancing agents, plasticizers, lubricants, rheology modifiers, thixotropic agents, chain extenders, optical brighteners, antimicrobial active ingredients (e.g., biocides), antistatic agents, slip agents, anticaking agents, coupling agents, crosslinkers, branching agents, anticrosslinking agents, hydrophilizing agents, hydrophobicizing agents, adhesion promoters, dispersants, compatibilizers, oxygen scavengers, acid scavengers, blowing agents, degradation additives, defoamers, odor scavengers, tracers,anti-fog agents, additives to increase electrical and / or thermal conductivity, infrared absorbers or infrared reflectors, gloss enhancers, detarnishing agents, repellents, fillers, reinforcing substances and mixtures thereof.

16. Plastic composition according to any one of claims 11 to 15, characterized in that the plastic composition further contains at least one additive selected from the group consisting of a) acid sequestrants, preferably calcium stearate, magnesium stearate, zinc stearate, aluminum stearate, calcium stearate, calcium lactate, calcium stearoyl-2-lactate, hydrotalcite, especially synthetic hydrotalcites based on aluminum, magnesium and zinc, hydrocalumites, zeolites, alkaline earth oxides, especially calcium oxide and magnesium oxide, alkaline earth carbonates, especially calcium carbonate, magnesium carbonate and dolomite, and hydroxides, especially brucite, b) photostablers, preferably photostablers from the group of hindered amines, c) dispersants, d) charge deactivators, and e) mixtures thereof.

17. A plastic composition according to any one of claims 11 to 16, characterized in that at least one of the recycled halogen-free thermoplastic products is a recycled polyolefin product, especially a recycled polypropylene or polyethylene product. czfrQnn / Lznz / e / YiAi 18. Plastic composition according to any one of claims 11 to 17, characterized in that the plastic composition can be manufactured by a process according to any one of claims 1 to 10.

19. Molding mass or molded part that can be manufactured from a plastic composition according to any one of claims 11 to 18, especially in the form of injection-molded parts, sheets, films, varnishes, coatings, foams, fibers, cables, tubes, profiles, hollow bodies, tapes, membranes, for example, geomembranes, lubricants, colorants and / or adhesives, which are manufactured by extrusion, injection molding, blow molding, calendering, pressing process, spinning processes and / or rotomolding, for example, for the electrical industry, for the construction industry, for the transport industry, for medical applications, for household appliances and electrical equipment, for vehicle parts, for consumer goods, for packaging, for furniture and / or for textiles.

20. Stabilizer composition for stabilizing halogen-free thermoplastic recycled products against oxidative, thermal and / or actinic degradation, comprising (A) at least one compound capable of reacting with carbonyl groups, in combination with (B) at least one primary antioxidant and / or (C) at least one secondary antioxidant, wherein the stabilizer composition is free of alditols and cyclitols.

21. Stabilizer composition according to the preceding claim, characterized in that component (A) is contained in the plastic composition in a weight ratio with respect to component (B) and / or component (C) of 90:10 to 10:90, preferably 80:20 to 20:80, with special preference 60:40 to 40:

60.

22. Stabilizer composition according to any one of the two preceding claims, characterized in that it comprises at least one compound (A) capable of reacting with carbonyl groups, at least one primary antioxidant (B), and at least one secondary antioxidant (C). czfrQnn / Lznz / e / Yi / u 23. Stabilizer composition according to any one of claims 21 to 22, characterized in that it comprises (A) 90.00 to 10.00% by weight or 80.00 to 20.00% by weight, preferably 60.00 to 40.00% by weight of at least one compound capable of reacting with carbonyl groups, with the exception of alditols and cyclitols, in combination with (B) 10.00 to 90.00% by weight, preferably 20.00 to 30.00% by weight of at least one primary antioxidant and / or (C) 10.00 to 90.00% by weight, preferably 20.00 to 30.00% by weight of at least one secondary antioxidant.

24. Use of a stabilizer composition according to any one of claims 15, 21 to 23 for stabilizing recycled halogen-free thermoplastic products against oxidative, thermal and / or actinic degradation.