DIENE RUBBER COMPOSITION AND PROCESS FOR PRODUCING THE SAME

WIPO Patent Application WO/2004/067625

A1

A diene rubber composition with excellent processability which reconciles fuel-saving performance with high road-holding performance and is excellent in tensile strength and wearing resistance; a diene rubber obtained by crosslinking the composition; and a process for producing the composition. The composition is characterized in that it comprises 100 parts by weight of a diene rubber having a molecular-weight distribution, which is represented by the ratio of the weight-average molecular weight to the number-average molecular weight, of 1.1 to 30, 20 to 200 parts by weight of silica, and a cationic polymer and that the amount of rubber components insoluble in toluene is 0.2 to 1 g per g of the silica. The process for producing the composition is characterized by reacting a rubber latex stabilized with an anionic emulsifying agent with an aqueous silica suspension containing a cationic polymer and co-coagulating the rubber contained in the rubber latex and the silica contained in the aqueous suspension in a specific pH range.

WATANABE KAZUTAKA (JP)
YATABE OSAMU (JP)
KARATO TAKESHI (JP)
CHINO YOSHIHIRO (JP)
FUKAHORI TAKAHIKO (JP)

PCT/JP2004/000920

August 12, 2004

January 30, 2004

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TOKUYAMA CORP (JP)
WATANABE KAZUTAKA (JP)
ZEON CORP (JP)
YATABE OSAMU (JP)
KARATO TAKESHI (JP)
CHINO YOSHIHIRO (JP)
FUKAHORI TAKAHIKO (JP)

B60C1/00; B60C15/06; C08J3/215; C08K3/36; C08L21/00; C08L101/02; (IPC1-7): C08L9/00; C08K3/36; C08L101/02; C08J3/215

WO2001053386A1

2001-07-26

JP2003221402A	2003-08-05
JP2001213971A	2001-08-07
JPH10231381A	1998-09-02
JPH07118449A	1995-05-09
US4366285A	1982-12-28

See also references of EP 1589069A4

Shoji, Sachio (Bunkyo-ku, Tokyo, JP)

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