STYRENE-BASED RESIN COMPOSITION FOR EXTRUSION FOAMING AND MOLDED FOAM PRODUCT

摘要

PROBLEM TO BE SOLVED: To obtain a styrene-based resin for extrusion foaming readily allowable to increase expansion ratio at the time of the extrusion foam molding and giving an extrusion molded foam product having an excellent surface property of the molded product. SOLUTION: This styrene-based resin composition comprises 100 pts.wt. styrene-based resin (A) having 0.3-0.9 dl/g reduced viscosity of a soluble part in methyl ethyl ketone, 0.1-20 pts.wt. AS-based resin (B) having 1.0-20 dl/g reduced viscosity of a soluble part in methyl ethyl ketone and 0.1-15 pts.wt. chemical foaming agent (C).