Novel stabilized polymer compositions

Claim 1

A stabilized polymer composition which comprises at least one resin containing at least 40% by weight of chlorine and selected from the group consisting of homopolymers of vinyl chloride and vinylidene chloride, postchlorinated polyolefins and copolymers of vinyl chloride or vinylidene chloride with up to 25%, based on the total weight of monomers, of other copolymerizable monomers, and as stabilizer therefor 0.01 - 10% by weight (based on the weight of the polymer) of an organothiotin compound of the formula ##EQU29## wherein each of R 1 and R 2 , which are the same or different, is an alkyl group of 1-20 carbon atoms, a cycloalkyl or phenyl group; m is an integer of 1-8; each of X and Y, which are the same or different exhibits the formula ##EQU30## or ##EQU31## or ##EQU32## or ##EQU33## or and optionally not more than one of either X or Y may be SR 4 ##EQU34## wherein Q 1 is of formula ##EQU35## and Q 2 is hydrogen, an alkyl group of 1 to 6 carbon atoms or CH 2 Z 3 , in which Z 3 is as defined for Z 1 or Z 2 below, and each of Z 1 and Z 2 , which are the same or different, exhibits the formula ##EQU36## a pair of radicals selected from the group consisting of Z 1 , Z 2 and Z 3 forms a group of formula ##EQU37## wherein R 3 is an alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted phenyl group or an alkyl phenyl group, which is substituted or unsubstituted, or two R 3 groups form a single bond between two carbon atoms, an alkylene group of 1 to 20 carbon atoms, an alkenylene group of 2 to 20 carbon atoms or a substituted or unsubstituted phenyl group; R 4 is an alkyl group of 1 to 20 carbon atoms or a substituted or unsubstituted phenylalkyl group with 1 to 6 carbon atoms in the alkyl group, or two R 4 groups are bonded together to form an alkylene group of 1 to 20 carbon atoms which is unsubstituted or substituted by at least one phenyl group, or an alkenylene group of 2 to 20 carbon atoms or a cycloalkylene group of 5 or 6 carbon atoms; R 5 is an alkyl group of 1 to 20 carbon atoms, a substituted or unsubstituted phenyl group or an alkylphenyl group which is substituted or unsubstituted, or two R 5 groups are bonded together to form an alkylene group of 1 to 20 carbon atoms; R 6 is a single bond, an alkylene group of 1 to 20 carbon atoms or an alkenylene group of 2 to 20 carbon atoms or a substituted or unsubstituted phenylene group and each of a and n, which are the same or different, is an integer of 1 to 6.