Patent ID: 6462116
Filing Date: 2002-10-08
Classification: C08K

Abstract:
A polymer composition comprising a halogen-containing polymer and a stabilizer composition consisting essentially of:(A) an organothio compound selected from the group consisting of dithiodiglycol, polyformals and polyacetals of said dithiodiglycol, and a mercaptoalkanol having the formula: wherein R1 and R2 are the same or different and are hydrogen or C1 to C18 alkyl; and i is 0 or an integer from 1 to 6 inclusive; (B) at least one zinc mercaptoester selected from the group consisting of: (B1) a zinc mercaptoacid ester having the formula: Znâ€”[S(CH2)xâ€”C(&boxH;O)OR]2 wherein R is a hydrocarbyl radical having from 2 to about 22 carbon atoms and x is 1 or 2; (B2) a zinc mercaptoacid ester having the formula: Znâ€”{S(CHR)a(CH2)bâ€”[C(&boxH;O)ORâ€²]2, â€ƒwherein: Râ€² is methyl or C(&boxH;O)ORâ€³Râ€³ is [(CH2â€”[Câ€”(R*(R2*)]y*CH2O)zR3]; R* is H, alkyl, or hydroxyalkyl; R2* is OH, hydroxy-substituted alkyl, or O(O&boxH;)Câ€”R4*; R3* is H, (O&boxH;)Câ€”R4*, or alkyl; R4* is alkyl or alkenyl; A=0 or 1; b=1 or 2, y=0 or 1; and z=1 to 4; (B3) a zinc, mecaptoalk yl carboxylic acid ester having the formula: Zn[SCH2(CH2)qOâ€”C(&boxH;O)R5*]2; â€ƒwherein R5* is an alkyl or alkenyl group having from 1 to 18 carbon atoms or an aryl group having from 6 to 12 carbon atoms, and q is from 1 to 6; â€ƒthe amount of said zinc mercaptoester being from 0.2 part to 1.7 parts per hundred parts of the polymer; (C) from 0 to 40% by weight of a basic alkali or alkaline earth metal compound; and (D) from 0 to 40% by weight of a substituted dihydropyridine.