发明名称 |
Ethylene-olefin rubbery copolymers and composition thereof for use as sponge rubber. |
摘要 |
A rubbery terpolymer is made by copolymerisation of ethylene and an alpha-olefin (e.g. propylene) at a weight ratio of 73:27 to 40:60, and a diolefin (e.g. ethylidene norbornene) in a liquid organic reaction medium with a Ziegler catalyst; the amount of diolefin units is such as to give the terpolymer an iodine value of 10 to 38 and the copolymer has a Mooney viscosity (Ml1+4121<o>C) of 135 to 200. In 100 parts by weight of the polymer is incorporated 30 - 130 parts of a plasticiser, e.g. process oil, and a foaming agent, and preferably vulcanising additives and a filler, and the composition is molded, foamed and crosslinked to make a shaped synthetic rubber sponge useful as a seal for vehicle bodies and which has good compression qualities and hysteresis loss.
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申请公布号 |
EP0389144(A2) |
申请公布日期 |
1990.09.26 |
申请号 |
EP19900302430 |
申请日期 |
1990.03.07 |
申请人 |
SUMITOMO CHEMICAL COMPANY, LIMITED |
发明人 |
YAMAMOTO, KEISAKU;YAMADA, HIDEAKI;IKETANI, KOHICHI |
分类号 |
C08F210/18;C08J9/06;C08L23/16 |
主分类号 |
C08F210/18 |
代理机构 |
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代理人 |
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地址 |
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