Synergistic stabilizer mixture

A stabilizer mixture comprising a component a) and a component b), c), d) or e), where

• component a) is at least one compound of the formula I
• 35
• in which R1 is hydrogen or methyl,
• R2 is a direct bond or C1-C10alkylene and
• n1 is a number from 2 to 50;
• component b) is at least one compound of the formulae IIa and IIb
• 36
• in which n2 und n2* are a number from 2 to 50;
• component c) is at least one compound of the formula III
• 37
• in which R3 and R7, independently of one another, are a direct bond or an —N(X1)—CO—X2—CO—N(X3)— group, where X1 and X3, independently of one another, are hydrogen, C1-C9alkyl, C5-C12cycloalkyl, phenyl, C7-C9phenylalkyl or a group of the formula IV
• 38
• and X2 is a direct bond or C1-C4alkylene,
• R4 is hydrogen, C1-C8alkyl, O,—CH2CN, C3-C6alkenyl, C7C8phenylalkyl,
• C7C9phenylalkyl which is substituted by C1-C4alkyl on the phenyl radical, or C1-C8acyl,
• R5, R6, R9 and R10, independently of one another, are hydrogen, C1-C30alkyl,
• C5-C12cycloalkyl or phenyl,
• R8 is hydrogen, C1-C30alkyl, C5-C12cycloalkyl, C7-C9phenylalkyl, phenyl or a group of the formula IV, and
• n3 is a number from 1 to 50;
• component d) is at least one compound of the formula V
• 39
• in which R11, R12, R13, R14 and R15, independently of one another, are a direct bond or C1-C10alkylene, R16 is as defined for R4, and n4 is a number from 1 to 50;
• and
• component e) is a product obtainable by reacting a product, obtained by reacting a polyamine of the formula VIa with cyanuric chloride, with a compound of the formula VIb
• H2N—(CH2)n5′—NH—(CH2)n5″—NH—(CH2)n5′″—NH2 (VIa)
• 40
• in which n5′, n5″ and n5′″, independently of one another, are a number from 2 to 12, R17 is hydrogen, C1-C12alkyl, C5-C12cycloalkyl, phenyl or C7-C9phenylalkyl, and R18 is as defined for R4.