PURPOSE: To greatly improve the bonding strength between a polyarylene sulfide resin compsn. and various materials, such as a ceramic, a metal, or a plastic, when they are bonded together with an adhesive or the adhesion between the compsn. and a potting material, such as a silicone resin or an epoxy resin, to a practical level.

CONSTITUTION: This polyphenylene sulfide resin compsn. is prepd. by compounding 100 pts.wt. polyphenylene sulfide resin with about 0.1-50 pts.wt. cured epoxy resin which is obtd. by curing an epoxy resin, pref. a multifunctional epoxy resin of a naphthalene type, with a specific amine compd. such as a polyamideamine or polyethyleneimine.