FOAMABLE RUBBER-MODIFIED STYRENE RESIN PARTICLE, FOAMED PARTICLE OBTAINED THEREFROM, AND MOLDED FOAM OBTAINED THEREFROM

摘要

PROBLEM TO BE SOLVED: To obtain foamable rubber-modified styrene resin particles which give foamed particles capable of being molded in a short molding cycle and suitable for obtaining a molded foam excellent in appearance, impact strengths, and softness. SOLUTION: The foamable rubber-modified stryene resin particle contains a styrene resin, 8-15wt.% butadiene rubber contg. 70% or higher 1,4-cis structure and dispersed therein in the form of particles having an average particle size of 1.5-3.0μm, up to 3.0wt.% mineral oil contained in the resin, up to 0.2wt.% water, and 1-15wt.% volatile blowing agent mainly comprising butane.