Crosslinkable rubber composition and crosslinked object
AssigneeZeon Corporation
InventorsOsamu Mori, Takafumi Kawanaka, Yoshiaki Aimura, Hiroyuki Kotsuji, Haruhiko Fujita
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Abstract
A crosslinkable rubber composition comprising (a) 100 weight parts of a nitrile group-containing highly saturated copolymer rubber containing units of an ethlenically unsaturated dicarboxylic acid monoalkyl ester monomer, (b) 0.5 to 10 parts by weight of a polyamine crosslinking agent, and (c) 0.5 to 10 parts by weight of a basic crosslinking accelerator. This rubber composition gives a crosslinked nitrile group-containing highly saturated copolymer rubber article having excellent heat resistance, flex fatigue resistance and elongation, and reduced permanent set.
Claims17
A crosslinkable rubber composition comprising:
- (a) 100 parts by weight of a nitrile group-containing highly saturated copolymer rubber containing units of an ethylenically unsaturated dicarboxylic acid monoalkyl ester monomer,
- (b) 0.5 to 10 parts by weight of a polyhydrazide crosslinking agent, and
- (c) 0.5 to 10 parts by weight of a basic crosslinking accelerator.
A crosslinkable rubber composition comprising:
- (a) 100 parts by weight of a nitrile group-containing highly saturated copolymer rubber containing units of an ethylenically unsaturated dicarboxylic acid monoalkyl ester monomer;
- (d) 10 to 90 parts by weight of an acrylic rubber;
- and,
- based on 100 parts by weight of the sum of the nitrile group-containing highly saturated copolymer rubber (a) and the acrylic rubber (d),
- (b) 0.5 to 10 parts by weight of a polyhydrazide crosslinking agent and
- (c) 0.5 to 10 parts by weight of a basic crosslinking agent.
Dependencies are inferred from the claim text.