Method of preparing a chemical composition comprised of molding

Abstract

A method of effecting chemical bonding between a thermoplastic polymer having the recurring unit: ##STR1## and a synthetic rubber, comprising, covulcanizing a polyphenylene ether containing, thermoplastic molding compound and said synthetic rubber by heating the mixture in the presence of a vulcanizing system, said polyphenylene ether containing, thermoplastic molding compound having the composition, a) 100 parts by weight of polymers of ortho-substituted phenols having the formula: ##STR2## where R.sub.1 and R.sub.2 independently represent a methyl group or hydrogen, and R.sub.3 and R.sub.4 represent an alkyl group with up to 6 carbon atoms, or R.sub.3 represents hydrogen and R.sub.4 represents a tertiary alkyl group with up to 6 carbon atoms, b) 0-20 parts by weight polyalkenylenes, and, c) 0-100 parts by weight styrene polymers; and said synthetic rubber containing double bonds, being combined with fillers and plasticizers and being a member selected from the group consisting of (1) SBR rubbers, (2) BR rubbers, (3) IR rubbers, (4) IIR rubbers, (5) mixtures of at least two rubbers (1)-(4), and (6) mixtures of any one or more rubbers (1)-(5) with up to 80 wt. % of the rubber mixture being substituted by CIIR rubbers, up to 95 wt. % of the rubber mixture being substituted by NR rubber, up to 60 wt. % of the rubber mixture being substituted by CR rubber or up to 25 wt. % of the rubber mixture being substituted by NBR rubber.