Acrylic rubber composition
AssigneeNissin Chemical Industry Co., Ltd.
InventorsHiroyuki Ohata, Harukazu Okuda
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Abstract
Proposed is an acrylic rubber composition suitable for hot-air vulcanization under normal pressure with a greatly increased vulcanization velocity. The composition comprises: (1) 100 parts by weight of an acrylic rubber polymer which is a copolymerization product of a monomer mixture consisting of (a) from 1 to 25% by weight of an alkoxy-substituted alkyl (meth)acrylate, (b) from 55 to 99% by weight of an alkyl (meth)acrylate, and (c) from 0 to 20% by weight of a third comonomer selected from several ethylenically unsaturated monomeric compounds; (2) from 0.1 to 20 parts by weight of an alkoxy silane compound having an unsaturated group; (3) from 10 to 200 parts by weight of a reinforcing filler; and (4) from 0.1 to 10 parts by weight of an organic peroxide.
Claims14
An acrylic rubber composition suitable for hot-air vulcanization under normal pressure which comprises, as a uniform blend:
- (1) 100 parts by weight of an acrylic rubber polymer which is a copolymerization product of a monomer mixture consisting of
- (a) from 1 to 25% by weight of a first comonomer which is an alkoxy-substituted alkyl (meth)acrylate,
- (b) from 55 to 99% by weight of a second comonomer which is an alkyl (meth)acrylate, and
- (c) from 0 to 20% by weight of a third comonomer which is selected from the group consisting of styrene, vinyl toluene, .alpha.-methyl styrene, vinyl naphthalene, (meth)acrylic add, (meth)acrylamide, 2-hydroxyethyl (meth)acrylate, glycidyl (meth)acrylate, allyl glycidyl ether, (meth)acrylonitrile, ethylene, propylene, vinyl chloride, vinyl acetate, vinyl monochloroacetate, 2-chloroethyl vinyl ether, divinyl benzene, allyl (meth)acrylate and butane diol di(meth)acrylate,
- the total amount of the first to third comonomers being 100%;
- (2) from 0.1 to 20 parts by weight of an alkoxy silane compound having an ethylenically unsaturated group in the molecule;
- (3) from 10 to 200 parts by weight of a reinforcing filler;
- and
- (4) from 0.1 to 10 parts by weight of an organic peroxide.
Dependencies are inferred from the claim text.