PURPOSE: To provide the title compsn. which has excellent resistance to impact, solvents and stress cracking and gives molded products having excellent surface gloss, by blending a specified rubber-modified arom. vinyl resin with a polyphenylene ether.
CONSTITUTION: 2W10wt% (based on the amount of a soln. described below) PS (a) having a specific viscosity of not higher than 0.15 (in 0.2g/dl of toluene soln. at 25°C) is dissolved in a soln. obtd. by dissolving a polybutadiene rubber (b) having a weight-average particle size of 4W10μ and a ratio of the weight- average particle size to the number-average particle size of not higher than 2.5 (e.g., polybutadiene rubber) in an arom. vinyl monomer (c) (e.g., styrene). If desired, they are prepolymerized in the presence of a low graft polymn. initiator at 70W130°C by bulk polymn. to a conversion of 15W45wt%. The polymn. is then continued at 70W180°C by a bulk, soln. or suspension polymn. method to complete the polymn. to obtain a rubber-modified arom. vinyl resin (A) having a component (b) content of 2W20wt%. 80W20wt% component A is blended with 20W80wt% polyphenylene ether (B).
OSHIDA TAKAHIRO
UCHIDA MINORU
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