COMPOSICAO ESTABILIZADORA APLICAVEL PARA AUMENTAR A RESISTENCIA DE POLIMEROS OU CO-POLIMEROS DE CLORETO DE VINILA AS ALTERACOES DE SUAS PROPRIEDADES FISICAS POR EXPOSICAO AO CALOR

摘要

An improved stabilizer for polyvinyl chloride polymers and copolymers against heat has the composition (a) a compound having the general formula: wherein Y is a hydrogen atom or an acyl group, and R is selected from hydrogen, an alkyl group having 1 - 18 carbon atoms or a cycloalkyl group having 1 - 18 carbon atoms or an aralkyl group having 1 - 18 carbon atoms; and (b) an organic phosphite.