Stabilizer composition

A stabilizer composition comprising:

• (a) at least one light stabilizer selected from sterically hindered amines (HALS) in which the amino group carries a basicity-reducing substituent;
• (b) at least one antioxidant comprising one or more thioether groups;
• (c) at least one plasticizer which is liquid at 25° C. and which is selected from plasticizers comprising carboxylate groups;
• (d) optionally at least one UV absorber;
• and
• (e) optionally at least one photolatent or thermally latent initiator,
• wherein the sterically hindered amine is selected from the group consisting of compounds of formula I
• wherein
• R1 is a group -A-C(═X)—R5 or a group —OR6;
• R2a, R2b, R3a and R3b, independently of each other, are C1-C3-alkyl;
• R4 is selected from the group consisting of hydrogen, C1-C12-alkyl which may carry one or more substituents R7;
• —OR8, —S(O)mR9, —NR10aR10b, —C(═O)R11 and —C(═S)R11;
• R5 is selected from the group consisting of C1-C12-alkyl which may carry one or more substituents R7;
• —OR8, and —NR10aR10b,
• R6 is selected from the group consisting of C1-C12-alkyl which may carry one or more substituents R7;
• and —C(═O)—C1-C8-alkyl, where the alkyl moiety may carry one or more substituents R7;
• each R7 is independently selected from the group consisting of —Si(R12)3, —OR8, —OSC2R8, —S(O)mR9, —N(R10a)R10b, —C(═O)N(R10a)R10b, —C(═S)N(R10a)R10b, —C(═O)OR8, —CH═NOR8, C3-C6-cycloalkyl, optionally substituted with one or more substituents R13, phenyl, optionally substituted with 1, 2, 3, 4 or 5 substituents R13, and a 3-, 4-, 5-, 6- or 7-membered saturated, partially unsaturated or maximally unsaturated heterocyclic ring comprising 1, 2 or 3 heteroatoms or heteroatom groups selected from the group consisting of N, O, S, NO, SO and SO2, as ring members, where the heterocyclic ring is optionally substituted with one or more substituents R13,
• each R8 is independently selected from the group consisting of hydrogen, C1-C12-alkyl which may carry one or more substituents R14;
• and —C(═O)—C1-C12-alkyl, where the alkyl moiety may carry one or more substituents R14;
• each R9 is independently selected from the group consisting of hydrogen, C1-C12-alkyl which may carry one or more substituents R14;
• and C1-C12-alkoxy,
• R10a and R10b, independently of each other and independently of each occurrence, are selected from the group consisting of hydrogen, C1-C12-alkyl which may carry one or more substituents R14;
• and C1-C12-alkoxy;
• each R11 is independently selected from the group consisting of hydrogen, C1-C12-alkyl which may carry one or more substituents R14;
• and C1-C12-alkoxy;
• each R12 is independently selected from the group consisting of C1-C12-alkyl which may carry one or more substituents R14;
• and C1-C12-alkoxy;
• each R13 is independently selected from the group consisting of hydroxyl, cyano, C1-C4-alkyl and C1-C4-alkoxy, or two R13 bound on the same carbon atom of a cycloalkyl ring or a heterocyclic ring may form together a group ═O;
• each R14 is independently selected from the group consisting of —Si(R15)3, hydroxyl, cyano, C1-C12-alkoxy, amino, C1-C4-alkylamino, di-(C1-C4-alkyl)-amino, aminocarbonyl, C1-C4-alkylaminocarbonyl, di(C1-C4-alkyl)-aminocarbonyl, C1-C4-alkylcarbonyl, C1-C4-alkoxycarbonyl, C3-C6-cycloalkyl, optionally substituted with 1, 2, 3, 4 or 5 substituents R13, phenyl, optionally substituted with 1, 2, 3, 4 or 5 substituents R13, and a 3-, 4-, 5-, 6- or 7-membered saturated, partially unsaturated or maximally unsaturated heterocyclic ring comprising 1, 2 or 3 heteroatoms or heteroatom groups selected from the group consisting of N, O, S, NO, SO and SO2, as ring members, where the heterocyclic ring is optionally substituted with one or more substituents R13;
• each R15 is independently selected from the group consisting of C1-C12-alkyl and C1-C12-alkoxy;
• A is —(CH2)n— or —(CH2)p—O—, where O is bound to C(═X);
• X is O or S;
• m is 0, 1 or 2;
• n is 3 or 4;
• and
• p is 2 or 3;
• compounds of formula II
• wherein
• each R1′ has independently one of the meanings given above for R1;
• R2a, R2b, R3a and R3b, independently of each other, are as defined above;
• and
• G is selected from the group consisting of C1-C10-alkylene, —O—C2-C10-alkylene-O—, —C(═O)—C1-C10-alkylene-C(═O)—, and —O—C(═O)—C1-C10-alkylene-C(═O)—O—;
• compounds of formula III
• wherein
• R2a, R2b, R3a and R3b, independently of each other, are as defined above;
• E is —(CH2)n, —(CH2)p—O—, where O is bound to C(═O), —(CH2)n—C(═O)-E1-, or —(CH2)p—O—C(═O)-E1-, where
• n and p are as defined above;
• and
• E1 is linear or branched C1-C10-alkylene;
• R16 is hydrogen or C1-C4-alkyl;
• R17 is hydrogen, C1-C4-alkyl or C1-C4-alkoxy;
• and
• k is 2 to 50;
• and
• mixtures thereof,
• and wherein the plasticizer is selected from the group consisting of acrylate polymers, where the acrylate polymers may also contain methacrylates in polymerized form, and non-polymeric plasticizers comprising carboxylate groups selected from the group consisting of aromatic carboxylates, aliphatic carboxylates, and cycloaliphatic carboxylates.