MALEIC ACID IMIDE alpha -OLEFIN COPOLYMERS AND THEIR USE AS LIGHT-PROTECTION AGENTS AND STABILIZERS FOR ORGANIC MATERIALS

摘要

Described are maleic acid imide alpha -olefin copolymers with a mean molecular weight of 1,000 to 50,000, built up of structural units of the formula I, R<1> being a tetramethylpiperidinyl grouping of the formula II in which R<3> is hydrogen, C1 to C6 alkyl, formyl, C2 to C6 alkanoyl, C1 to C12 alkoxy, C5 to C6 cycloalkoxy, cyanomethyl, 2-Hydroxyethyl, benzyl or a group of the formula -CR<4> = CH-CO-OR<5>, R<4> being hydrogen,C1 to C6 alkyl or a group of the formula -CO-OR<5>, and r<5> being C1 to C18 alkyl, C5 to C8 cycloalkyl, C7 to C18 aralkyl, phenyl or tolyl, where R<1> can also denote, in a quantity of up to 8 mole % relative to II, hydrogen, C1 to C22 alkyl or C5 to C8 cycloalkyl, and R<2> is a mixture of C14 to C28 alkyl groups, two of these alkyl groups, which may not differ from each other by more than two C-atoms, constituting at least 30 % of this mixture. The copolymers described are suitable for use as light-protection agents and stabilizers for organic materials, particularlyplastics and paints.