| 摘要 |
PURPOSE:To prepare the title polymer excellent in impact strength, flexibility, mold releasability, and oxygen transmissivity by compounding a propylene polymer with a specific organopolysiloxane, a butadiene rubber, and an org. peroxide each in a specified amt. and thermally mixing the resulting compsn. CONSTITUTION:100 pts. wt. propylene polymer (e.g. an ethylene-propylene copolymer) is compounded with 1-900 pts.wt. organopolysiloxane of the formula [wherein R<1> is an aliph. unsatd. group; R<2> is a (substd.)monovalent hydrocarbon group not contg. an aliph. unsatd. group; and (a) and (b) are numbers satisfying 0<=a<1, 0.5<b<3, and 1<a+b<3], 0.1-50 pts. wt. butadiene rubber (e.g. a 1,2-polybutadiene), and 0.01-1.0 pt.wt. org. peroxide [e.g. 2,5-dimethyl-2,5-di(tert- butylperoxy)hexyne-3] to give a compsn., which is thermally mixed to give the title polymer. |
