| 摘要 |
PURPOSE:To obtain a copolymer compsn. excellent in stiffness, impact strength, and resistance to discoloration by compounding a crystalline propylene-ethylene block copolymer and a specified amt. of a specific polymer. CONSTITUTION:55-99wt.% crystalline propylene-ethylene block copolymer, 1-15wt.% polymer consisting of 1-butene or of 1-butene and a 2-20C alpha-olefin (e.g. ethylene) and contg. at least 50mol% 1-butene, and 0-30wt.% high-density PE, the sum being 100wt.%, are compounded. |
