Process for producing sulfur-curable acrylic rubbers
AssigneeNippon Zeon Co., Ltd.
InventorsTetsu Ohishi, Kohichi Handa, Haruo Ueno
Life of this patent
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Abstract
A process for producing a sulfur-curable acrylic rubber is provided which comprises radical-copolymerizing (1) an alkyl acrylate with (2) an alkenyl acrylate or methacrylate, or radical-copolymerizing (1) an alkyl acrylate, (2) an alkenyl acrylate or methacrylate, (3) an alkoxyalkyl acrylate and optionally (4) acrylonitrile. These acrylic rubbers can be cured at a rate as fast as those for curing diene-type rubbers, and the cured products exhibit superior properties without long heat-treatment after curing.
Claims10
A process for producing a sulfur-curable acrylic rubber, which comprises copolymerizing in the presence of a radical initiator
- (1) 90 to 99.5% by weight of at least one alkyl acrylate with the alkyl group containing 1 to 8 carbon atoms, and
- (2) 0.5 to 10% by weight of at least one monomer of the general formula ##STR3## wherein R.sub.1 represents a hydrogen atom or a methyl group, and R.sub.2 and R.sub.3, independently from each other, represent an alkyl group containing 1 to 3 carbon atoms.
A process for producing a sulfur-curable acrylic rubber, which comprises copolymerizing in the presence of a radical initiator
- (1) 30 to 89.5% by weight of at least one alkyl acrylate with the alkyl group containing 1 to 8 carbon atoms,
- (2) 0.5 to 10% by weight of at least one monomer of the general formula ##STR4## wherein R.sub.1 represents a hydrogen atom or a methyl group, and R.sub.2 and R.sub.3, independently from each other, represent an alkyl group containing 1 to 3 carbon atoms,
- (3) 10 to 60% by weight of at least one alkoxyalkyl acrylate with the alkoxy group containing 1 to 4 carbon atoms and the alkylene group containing 1 to 4 carbon atoms, and
- (4) 0 to 30% by weight of acrylonitrile.
Dependencies are inferred from the claim text.