| 摘要 |
<p>An object of the present invention is to provide a cycloolefin copolymer composition which is excellent in the balance between transparency, impact resistance, and low stress whitening, and this object is achieved by a transparent cycloolefin copolymer resin composition comprising 100 parts by weight of a cycloolefin copolymer (A); and 1 to 50 parts by weight of an isobutylene block copolymer (B) comprising a polymer block (a) based on an aromatic vinyl compound and a polymer block (b) based on isobutylene, the isobutylene block copolymer (B) comprising a block copolymer (B1) having a number average molecular weight of 20,000 to 70,000 and a block copolymer (B2) having a number average molecular weight of 80,000 to 300,000, and the weight ratio of (B1) to (B2) ranging from 5/95 to 95/5.</p> |
