Stabilizer mixtures

A stabilizer mixture containing (I) two different sterically hindered amine compounds selected from the group consisting of the classes,

• (β-1) a compound of the formula (B-1):
• in which
• R1, R3, R4 and R5 independently of one another are hydrogen, C1-C12alkyl, C5-C12cycloalkyl, C1-C4-alkyl-substituted C5-C12cycloalkyl, phenyl, phenyl which is substituted by —OH and/or C1-C10alkyl;
• C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl radical by —OH and/or C1-C10alkyl;
• or a group of the formula (b-I):
• R2 is C2-C18alkylene, C5-C7cycloalkylene or C1-C4alkylenedi(B5-C7cycloalkylene), or
• the radicals R1, R2 and R3, together with the nitrogen atoms to which they are bonded, perform a 5- to 10-membered heterocyclic ring, or
• R4 and R5, together with the nitrogen atom to which they are bonded, form a 5- to 10-membered heterocyclic ring,
• R6 is hydrogen, C1-C8alkyl, O, —OH, —CH2CN, C1-C18alkoxy, C5-C12cycloalkoxy, C3-C6alkenyl, C7-C9phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C1-C4alkyl;
• or C1-C8acyl, and
• b1 is a number from 2 to 50,
• with the proviso that at least one of the radicals R1, R3, R4 and R5 is a group of the formula (b-I):
• (β-2) a compound of the formula (B-2):
• wherein
• R7 and R11 independently of one another are hydrogen or C1-C12alkyl,
• R8, R9 and R10 independently of one another are C2-C10alkylene, and
• X1, X2, X3, X4, X5, X6, X7 and X8 independently of one another are a group of the formula (b-II):
• in which R12 is hydrogen, C1-C12alkyl, C5-C12cycloalkyl, C1-C4alkyl-substituted
• C5-C12cycloalkyl, phenyl, —OH— and/or C1-C10alkyl-substituted phenyl, C7-C9phenylalkyl, C7-C9phenylalkyl which is substituted on the phenyl radical by —OH and/or C1-C10alkyl;
• or a group of the formula (b-I) as defined above, and
• R13 has one of the meanings of R6;
• (β-6) a product (B-6) obtainable by reacting a product, obtained by reaction of a polyamine of the formula (B-6-1) with cyanuric chloride, with a compound of the formula (B-6-2):
• H2—(CH2)b5′—NH—(CH2)b5″—NH—(CH2)b5′″—NH2 (B-6-1))
• in which
• b5′, b5″ and b5′″ independently of one another are a number from 2 to 12,
• R31 is hydrogen, C1-C12alkyl, C5-C12cycloalkyl, phenyl or C7-C9phenylalkyl, and
• R32 has one of the meanings of R6;
• (β-7) a compound of the formula (B-7):
• wherein A1 is hydrogen or C1-C4alkyl,
• A2 is a direct bond or C1-C10alkylene, and
• n1 is a number from 2 to 50;
• and
• (β-8) at least one compound of the formulae (B-8-a) or (B-8-b):
• wherein n2 and n2* are a number from 2 to 50;
• and
• (II) at least one compound selected from the group consisting of an organic salt of Zn, an inorganic salt of Zn, Zn oxide, Zn hydroxide, an organic salt of Mg, an inorganic salt of Mg, Mg oxide and Mg hydroxide;
• with the proviso that component (I) is different from the combination of the compounds (B-8-a) and (B-8-b):
• wherein n2 and n2* are a number from 2 to 50;
• and
• with the proviso that, when
• component (I) is the combination of the compounds (B-1-a-1) and (B-7-a):
• wherein b1 is a number from 2 to 50,
• wherein n1 is a number from 2 to 50;
• and,
• at the same time, component (II) is a Zn carboxylate;
• the stabilizer mixture additionally contains as a further component
• (X-1) a pigment or
• (X-2) an UV absorber or
• (X-3) a pigment and an UV absorber.