| 摘要 |
1,138,733. Olefin copolymer compositions. GENERAL ELECTRIC CO. 15 March, 1966 [19 April, 1965], No. 38731/68. Divided out of 1,138,732. Heading C3P. Curable elastomer compositions are prepared by (1) forming a first mix comprising a normally solid ethylene/propylene elastomer, a calcined clay filler and a minor proportion by weight of the elastomer of a normally liquid polybutadiene, (2) forming a second mix comprising minor proportions by weight of the elastomer of a vinyl silane and an organic peroxide, (3) subjecting the first mix to a preliminary blending and heat treatment at not over 180‹ C., and (4) blending the second mix with the first at not over 122‹ C. Alternatively the vinyl silane may be added to the first mix and the normally liquid polybutadiene to the second mix. One of the mixes may also comprise carbon black, and the compositions may be used for jacketing electric cables. Examples describe mixes of (1) ethylene/propylene rubbers, zinc oxide, lead dioxide, polymerized trimethyldihydroquinoline, clay, liquid polybutadiene and optionally polyethylene and processing oil; and (2) vinyl tri-(2-methoxyethoxy)-silane and dicumyl peroxide. |
