STYRENE-BASED RESIN COMPOSITION, MOLDING, METHOD FOR PRODUCING STYRENE-BASED RESIN COMPOSITION, AND MASTER BATCH

摘要

PROBLEM TO BE SOLVED: To produce a styrene-based resin composition with high product value and impact resistance using a recovered polystyrene resin.

SOLUTION: The styrene-based resin composition is provided, which contains: a vinyl aromatic hydrocarbon polymer (a) including, as a main component, a polystyrene resin (x) with foreign substances of 10 mass% or less; a polymer (b) including, as a main component, a vinyl aromatic hydrocarbon containing graft rubber obtained by graft polymerization of a rubbery polymer; and a block copolymer (c). The styrene-based resin composition contains 5-45 mass% of the polymer (b) including the vinyl aromatic hydrocarbon as a main component. The average particle size of the graft rubber is 1.5-5μm. The block copolymer (c) is a block copolymer comprising: at least two blocks including a vinyl aromatic hydrocarbon as a main component; and at least one block including a conjugated diene as a main component. The styrene-based resin composition contains 5-45 mass% of the block copolymer (c).

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