RUBBER COMPOSITION COMPRISING NITRILE COPOLYMER RUBBER, METAL SALT OF ETHYLENICALLY UNSATURATED CARBOXYLIC ACID, AND ORGANIC PEROXIDE, AND VULCANIZATE THEREOF

WIPO Patent Application WO/2003/029341

A1

A rubber composition comprising: (A) a nitrile copolymer rubber which comprises (a) 10 to 40 wt.% &agr ,ß−ethylenically unsaturated nitrile monomer units, (b) 10 to 60 wt.% &agr ,ß−ethylenically unsaturated carboxylic ester monomer units, (c) 0.01 to 56 wt.% conjugated diene monomer units, and (d) 14 to 69.99 wt.% saturated conjugated diene monomer units and in which the total content of the monomer units (c) and (d) is 20 to 70 wt.%, the content of the monomer units (d) is 70 wt.% or higher based on the sum of the monomer units (c) and (d), and the difference between the extrapolated glass transition initiation temperature (Tig) and the extrapolated glass transition ending temperature (Teg) in differential scanning calorimetry is 10°C or smaller&semi (B) a metal salt of an ethylenically unsaturated carboxylic acid&semi and (C) an organic peroxide. Also provided is a vulcanizate obtained by vulcanizing the rubber composition. The vulcanizate, which is obtained from the rubber composition, is excellent in cold resistance, oil resistance, and compression set.

TSUKADA AKIRA (JP)
FUJITA SHIGERU (JP)

PCT/JP2002/009963

April 10, 2003

September 26, 2002

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ZEON CORP (JP)
TSUKADA AKIRA (JP)
FUJITA SHIGERU (JP)

C08C19/02; C08F220/18; C08F236/14; C08F279/00; C08F2/44; C08F279/02; C08K5/098; C08K5/14; C08L9/02; C08L15/00; C08L51/04; G09C1/00; H04L9/32; (IPC1-7): C08L9/02; C08L15/00; C08K5/14; C08F279/00

JPH01311158A	1989-12-15
JPH044240A	1992-01-08
JP2001114940A	2001-04-24
JPH09241436A	1997-09-16
JPH06145423A	1994-05-24

See also references of EP 1449873A4

Wada, Yasuro c/o ZEON CORPORATION (6-1 Marunouchi 2-chom, Chiyoda-ku Tokyo, JP)

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