Vulcanizable rubber composition, seal used in dynamic state, and sealing material
AssigneeNippon Zeon Co., Ltd.
InventorsYoshiaki Aimura, Suguru Ito
Life of this patent
Estimating the term…
Abstract
A vulcanizable rubber composition comprising 100 wt. parts of a highly saturated nitrile copolymer rubber having an iodine value not larger than 80, 3-30 wt. parts of a reinforcing filler, 30-200 wt. parts of an oxide of a metal of group 2 of the periodic table, 30-200 wt. parts of a non-reinforcing filler, and 0.1-20 wt. parts of a vulcanizer. A sealing material comprised of a vulcanizate of the vulcanizable rubber composition and having friction coefficient (.mu.) not larger than 1.5 and an abrasion wear of 150-350 mg. A seal comprising the sealing material and a reinforcing ring.
Claims22
A vulcanizable rubber composition comprising a highly saturated nitrile copolymer rubber having an iodine value of not larger than 80 and, based on 100 parts by weight of the highly saturated nitrile copolymer rubber:
- (i) 3 to 30 parts by weight of a reinforcing filler,
- (ii) 50 to 200 parts by weight of an oxide of a metal of group 2 of the periodic table,
- (iii) 30 to 200 parts by weight of a non-reinforcing filler, and
- (iv) 0.1 to 20 parts by weight of an organic peroxide vulcanizer,
- wherein the highly saturated nitrile copolymer rubber is a product obtained by hydrogenating a copolymer of an unsaturated nitrile, a conjugated diene and an optional ethylenically unsaturated monomer.
Dependencies are inferred from the claim text.