Resin composition and process for producing the same

A resin composition prepared by simultaneously melting and kneading (A) a polyphenylene ether resin having an intrinsic viscosity of 0.2 to 0.6 dl/g as expressed in terms of intrinsic viscosity measured in chloroform at 30.degree. C., (B) a polyphenylene sulfide resin having melt viscosity of 200 to 10,000 poises at 300.degree. C. and (C) a functional compound selected from the group consisting of maleic anhydride, itaconic anhydride, citraconic anhydride, and fumaric acid, and subsequently mixing thereinto (D) a polar compound having, in one molecule, at least two polar groups selected from the group consisting of 1,12-diaminododecane, 1,8-diaminooctane, hexamethylenediamine, 2-amino-1-butanol and a diamine compound shown by the formula (1):

• ##STR7## wherein the proportion of the polyphenylene ether resin (A) and the polyphenylene sulfide resin (B) is 5:95 to 95:5 as expressed in terms of % by weight based on the sum of the polyphenylene ether resin (A) and the polyphenylene sulfide resin (B), and the proportions of the functional compound (C) and the polar compound (D) are 0.2 to 20 parts by weight and 0.02 to 10 parts by weight per 100 parts by weight of the sum of the polyphenylene ether resin (A) and the polyphenylene sulfide resin (B).