Acrylic rubber composition
AssigneeJsr Corporation
InventorsNobutoshi Kobayashi, Minoru Tanaka
Life of this patent
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Abstract
A crosslinkable acrylic rubber composition exhibiting superior balance between the storage stability and cure rate, and having only minimal risk of corroding metals or being contaminated by metals. The cured products made from the composition have excellent tensile strength, permanent compression set, and water resistance. The composition which comprises (1) a halogen-containing acrylic rubber, (2) a triazine thiol compound, (3) a dithiocarbamine acid derivative or a thiuram sulfide compound, or both, (4) a hydrotalcite compound or an organotin compound, or both, (5) an aromatic carboxylic acid compound or an acid anhydride thereof, or both, (6) a white filler with a pH of 2-10, and (7) a silane coupling agent.
Claims8
A crosslinkable acrylic rubber composition which comprises,
- (1) a halogen-containing acrylic rubber,
- (2) a triazine thiol compound,
- (3) a dithiocarbamine acid derivative or a thiuram sulfide compound, or both,
- (4) a hydrotalcite compound or an organotin compound, or both,
- (5) an aromatic carboxylic acid compound or an acid anhydride thereof, or both,
- (6) a white filler with a pH of 2-10, and
- (7) a silane coupling agent.
A crosslinkable acrylic rubber composition containing components (1)-(8) which is prepared by blending:
- (A) a mixture prepared by blending (8) an acrylate polymer, other than a crosslinking group containing acrylic rubber, containing alkyl acrylate or alkoxyalkyl acrylate, or both, as major components and either or both of (2) a triazine thiol compound and (4) a hydrotalcite compound or an organotin compound, or both,
- (B) (1) a halogen-containing acrylic rubber, (3) a dithiocarbamine acid derivative or a thiuram sulfide compound, or both, (5) an aromatic carboxylic acid compound or an acid anhydride thereof, or both, (6) a white filler with a pH of 2-10, and (7) a silane coupling agent, and
- (C) any remaining balance of the above component (2) or component (4), is not blended in the above mixture (A).
Dependencies are inferred from the claim text.