B-PINENE POLYMER COMPOSITION AND MOLDED OBJECT OBTAINED BY USING THE SAME

摘要

Disclosed are: a polymer composition from which is obtained a molded body that has high heat resistance, low water absorbency, a low specific gravity, and excellent shock resistance; and a molded object which uses the polymer composition. The polymer composition is manufactured by combining a) a b-pinene polymer having a specific gravity of 0.85 or higher but less than 1.0 and a glass transition temperature of 80°C or higher and b) an aromatic series vinyl block copolymer that comprises 10-35 mass% of an aromatic series vinyl polymer block and 65-90 mass% of a hydrogenated conjugate diene polymer block and that has a weight-average molecular weight of 100,000-250,000, these being combined such that the component a) is 60-95 parts by mass and the component b) is 5-40 parts by mass, with the total amount of component a) and component b) being 100 parts by mass.