发明名称 |
Method for preventing degradation and deterioration of vulcanized rubber material |
摘要 |
A method of preventing degradation of vulcanized rubber materials used in the operation of oil and gas wells comprising forming said rubber material from a sulfur vulcanized composition comprising a copolymer rubber having in the polymer chain (I) 10 to 60% by weight of a unit from an unsaturated nitrile, (II) not more than 10% by weight of a unit from a conjugated diene, and (III) 30 to 90% by weight of a unit from an ethylenically unsaturated monomer other than the unsaturated nitrile and/or a unit resulting from the hydrogenation of a unit from a conjugated diene, said rubber being vulcanized with a sulfur vulcanization system.
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申请公布号 |
US4559390(A) |
申请公布日期 |
1985.12.17 |
申请号 |
US19840617848 |
申请日期 |
1984.06.07 |
申请人 |
NIPPON ZEON CO., LTD. |
发明人 |
WATANABE, NOBORU;OYAMA, MOTOFUMI;KUBO, YOICHIRO |
分类号 |
C08L7/00;C08C19/02;C08F20/00;C08F22/32;C08F36/00;C08F36/04;C08L15/00;C08L21/00;C08L33/00;C08L33/02;E21B33/12;(IPC1-7):C08L9/02 |
主分类号 |
C08L7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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