| 摘要 |
PURPOSE:A composition having good balance of impact resistance and surface hardness, and improved gloss free from separation, obtained by blending unsaturated polyester with a specific vinyl aromatic compound-conjugated diene compound block copolymer. CONSTITUTION:(A) Unsaturated polyester is blended with (B) a vinyl aromatic compound-conjugated diene compound block copolymer shown by the formula A1-B1-A2, A1-B1-A2-B2, A1-B1-A2-B2-A3, A1-B1-A2-B2-A3-B3, or the formula (A1 is vinyl aromatic compound polymer block having >=60,000 number-average molecular weight, A2 and A3 are vinyl aromatic compound polymer having <60,000 number-average molecular weight; B1, B2 and B3 are polymer block consisting essentially of conjugated diene compound, having >=2,000 and <=200,000 number- average molecular weight; X is residue of coupling agent; m=1-3; n=1-6; m+n is 2-7; number average molecular weight of A1 is >=1.2 times as much as that of A2 or A3), having 70,000-500,000 number-average molecular weight in case of the former five formulas, 75,000-1,000,000 number-average molecular weight in case of the formula, having 60-90wt% vinyl aromatic compound cont ent, (C) a vinyl monomer, and (D) a curing agent.
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