Acrylate polymer elastomer and vulcanizable composition containing the same

An acrylic copolymer elastomer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 100 obtained by copolymerizing

• (a) 45 to 89.9 wt. % of a monomer represented by the formula ##STR12## wherein R.sup.1 represents an alkyl group having 1 to 8 carbon atoms, and/or a monomer represented by the formula ##STR13## wherein R.sup.2 represents an alkylene group having 1 to 8 carbon atoms and R.sup. 3 represents an alkyl group having 1 to 8 carbon atoms,
• (b) 10 to 35 wt. % of a monomer represented by the formula ##STR14## wherein R.sup.4 represents a hydrogen atom or a methyl group, R.sup.5 represents a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and n represents an integer of 1 to 5,
• (c) 0.1 to 10 wt. % of crosslinkable monomer, and
• (d) 0 to 30 wt. % of a monoethylenic unsaturated monomer copolymerizable with the above (a), (b) and (c) components.

An acrylic copolymer elastomer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 100 obtained by copolymerizing

• (a) 45 to 89.9 wt. % of a monomer represented by the formula ##STR15## wherein R.sup.1 represents an alkyl group having 1 to 8 carbon atoms, and a monomer represented by the formula ##STR16## wherein R.sup. 2 represents an alkylene group having 1 to 8 carbon atoms and R.sup.3 represents an alkyl group having 1 to 8 carbon atoms,
• (b) 10 to 45 wt. % of a monomer represented by the formula ##STR17## p1 wherein R.sup. 4 represents a hydrogen atom or a methyl group, R.sup.5 represents a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and n represents an integer of 1 to 5,
• (c) 0.1 to 10 wt. % of crosslinkable monomer, and
• (d) 0 to 30 wt. % of a monoethylenic unsaturated monomer copolymerizable with the above (a), (b) and (c) components.

An acrylic copolymer elastomer having a Mooney viscosity (ML.sub.1+4, 100.degree. C.) of 10 to 100 obtained by copolymerizing

• (a) 60 to 89.9 wt. % of a monomer represented by the formula ##STR18## wherein R.sup.1 represents an alkyl group having 2 to 4 carbon atoms, and a monomer represented by the formula ##STR19## wherein R.sup. 2 represents an alkylene group having 1 to 8 carbon atoms and R.sup. 3 represents an alkyl group having 1 to 8 carbon atoms,
• (b) 10 to 35 wt. % of a monomer represented by the formula ##STR20## wherein R.sup.4 represents a hydrogen atom or a methyl group, R.sup.5 represents a hydrogen atom or a hydrocarbon group having 1 to 4 carbon atoms, and n represents an integer of 1 to 5,
• (c) 0.5 to 5.0 wt. % of crosslinkable monomer, and
• (d) 0 to 30 wt. % of a monoethylenic unsaturated monomer copolymerizable with the above (a), (b) and (c) components.