Esters and mixtures thereof with organotin compounds useful as polymer stabilizers

摘要

An ester, which is a costabiliser of mono ordi organotin stabilisers for halogen containing resins, is of formula CH2OOCR4 ¦ CHOH ¦ CH2OOCCyH2y - SR5 ANGLE C ANGLE R9OOCCxH2x - SR3 wherein x and y are 1-6, R4 and R9 are alkyl, alkenyl, cycloalkyl or optionally substituted aromatic aralkyl or aralkenyl hydrocarbyl group, R3 and R5 are as R4 or R9 or is hydrogen or R3 and R5 form a cycloalkyl ring. The organotin stabilisers are carboxylates, mercapto carboxylates, carboxylate ester from diacids, sulphides, mercaptides or thiostannoic acids.