Laminate of vulcanizable rubber composition layers, process for producing rubber laminate, and rubber laminate
AssigneeNippon Zeon Co., Ltd.
InventorsMotofumi Oyama, Kazuyoshi Nakajima
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Abstract
A laminate of vulcanizable rubber composition layers, which comprises (i) a vulcanizable fluororubber composition layer comprising a fluororubber and a metal oxide and (ii) a vulcanizable nitrile rubber composition layer consisting essentially of a nitrile rubber, an organic phosphonium salt of the following formula (1), an organic peroxide crosslinking system, and an organic basic vulcanization accelerator: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are hydrocarbyl, and no more than three thereof may be amino or fluoroalkyl; and R.sub.5 is hydrogen or alkyl. A vulcanized laminate made of the vulcanizable rubber composition layers is useful for a fuel hose or a diaphragm.
Claims26
A laminate of vulcanizable rubber composition layers, which comprises (i) a layer of a vulcanizable fluororubber composition comprising a fluororubber and a metal oxide and (ii) a layer of a vulcanizable nitrile rubber composition consisting essentially of a nitrile rubber, an organic phosphonium salt represented by the following formula (1), an organic peroxide crosslinking system, and an organic basic vulcanization accelerator:
- ##STR4## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrocarbon group having 1 to 20 carbon atoms, which may have a substituent, and no more than three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be a primary, secondary or tertiary amino group or a fluoroalkyl group;
- and R.sub.5 represents hydrogen or an alkyl group having 1 to 20 carbon atoms.
A laminate of vulcanizable rubber composition layers, which comprises
- (i) a layer of a vulcanizable fluororubber composition comprising a fluororubber and a metal oxide and
- (ii) a layer of a vulcanizable nitrile rubber composition consisting essentially of
- a nitrile rubber blend which is a mixture of a copolymer rubber of an unsaturated nitrile monomer with a conjugated diene monomer and a polyvinyl chloride resin,
- an organic phosphonium salt represented by the following formula (1),
- an organic peroxide crosslinking system, and
- an organic basic vulcanization accelerator:
- ##STR5## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents a hydrocarbon group having 1 to 20 carbon atoms, which may have a substituent, and no more than three of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 may be a primary, secondary or tertiary amino group or a fluoroalkyl group;
- and R.sub.5 represents hydrogen or an alkyl group having 1 to 20 carbon atoms.
Dependencies are inferred from the claim text.