Vulcanization-adhered laminate of fluororubber and synthetic rubber
AssigneeNichirin Co., Ltd.
InventorsShinji Higashika, Takaaki Nomura, Keizo Saga, Shin-ichiro Goto
Life of this patent
Estimating the term…
Abstract
A vulcanization-adhered laminate is constituted by a structure where a fluororubber layer and a synthetic rubber-containing layer are tightly adhered by vulcanization by vulcanization, and the synthetic rubber layer prior to the vulcanization-adhesion includes organic peroxide, silica, organic phosphonium salt, maleic anhydride-modified polybutadiene, and magnesium oxide.
Claims4
A vulcanization-adhered laminate comprising a fluororubber layer which is vulcanization-adhered and in contact with a layer constituted by a synthetic rubber which is acrylonitrile-butadiene rubber (NBR), wherein the layer constituted by the acrylonitrilebutadiene rubber consists of, before vulcanization adhesion, NBR, components (1) to (5) below for vulcanization adhesion reaction, and at least one compounding agent selected from the group consisting of carbon black, filler, softener, plasticizer, anti-aging agent, stabilizer, and processing aid:
- (1) Organic peroxide, 0.5 to 10 parts by weight,
- (2) Silica, 5 to 35 parts by weight,
- (3) Organic phosphonium salt, 0.5 to 5 parts by weight,
- (4) Maleic anhydride-modified polybutadiene, 1 to 20 parts by weight, and
- (5) Magnesium oxide, 3 to 20 parts by weight, wherein all the above parts by weight are relative to 100 parts by weight of the acrylonitrilebutadiene rubber.
Dependencies are inferred from the claim text.