| 摘要 |
PROBLEM TO BE SOLVED: To obtain a molding material which is easy to be prepared, without deterioration in molding workability and has improved impact resistance after molding process by combining a random copolymer of an aromatic vinyl compound with isobutylene and a thermoplastic resin. SOLUTION: The ratio (A)/(B) which is a ratio of a structure unit (A) derived from an aromatic vinyl compound to a structure unit (B) derived from isobutylene is preferably 5/95-70-30 pts.wt. The weight-average molecular weight of a random copolymer is preferably 1,000-100,000. A thermoplastic resin preferably has a polar group. The thermoplastic resin which has a number-average molecular weight of 5,000-500,000 is usually used. The combining amount of the random copolymer is preferably 1-50 pts.wt. based on the thermoplastic resin of 100 pts.wt. |
