CURABLE RUBBER COMPOSITION FOR THE SEAL AGAINST HOT WATER

Title:

CURABLE RUBBER COMPOSITION FOR THE SEAL AGAINST HOT WATER

Document Type and Number:

WIPO Patent Application WO/1997/023560

Kind Code:

A1

Abstract:

A curable rubber composition for the seal against hot water which comprises 100 parts by weight of a rubber mixture comprising 90 to 50 % by weight of a highly saturated nitrile copolymer rubber prepared by hydrogenating the conjugated diene moieties of an unsaturated nitrile/conjugated diene copolymer rubber or unsaturated nitrile/conjugated diene/ethylenically unsaturated monomer terpolymer rubber and 10 to 50 % by weight of an ethylene/'alpha'-olefin copolymer rubber, 0.1 to 30 parts by weight of an organic peroxide curing agent and, if necessary, 10 to 100 parts by weight of carbon black. The seal produced by curing the above composition is so resistant to hot water containing chloride of lime that it is extremely reduced in the changes in volume and elongation and causes neither release of carbon black nor surface cracking in service.

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Inventors:

AIMURA YOSHIAKI (JP)
OHNISHI HIROKO (JP)

Application Number:

PCT/JP1996/003707

Publication Date:

July 03, 1997

Filing Date:

December 19, 1996

Export Citation:

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Assignee:

NIPPON ZEON CO (JP)
AIMURA YOSHIAKI (JP)
OHNISHI HIROKO (JP)

International Classes:

C08K5/14; C08L9/00; C08L9/02; C08L15/00; C08L21/00; C08L23/00; C08L23/08; C08L23/16; (IPC1-7): C08L15/00; C08K5/14; C08K3/04

Foreign References:

JPH06207050A	1994-07-26
JPH05271475A	1993-10-19

Other References: