HIGHLY SATURATED NITRILE COPOLYMER RUBBER, PROCESS FOR THE PRODUCTION THEREOF, HEAT-RESISTANT RUBBER COMPOSITIONS COMPRISING THE RUBBER AND COMPOSITES COMPRISING THE RUBBER AND FIBERS

Title:

HIGHLY SATURATED NITRILE COPOLYMER RUBBER, PROCESS FOR THE PRODUCTION THEREOF, HEAT-RESISTANT RUBBER COMPOSITIONS COMPRISING THE RUBBER AND COMPOSITES COMPRISING THE RUBBER AND FIBERS

Document Type and Number:

WIPO Patent Application WO/1997/036956

Kind Code:

A1

Abstract:

A highly saturated nitrile copolymer rubber lowered in Mooney viscosity by 15 or more points by applying a high shearing stress thereto in the presence of an age resister, which has a Mooney viscosity of 5 to 135 and a ratio of weight-average molecular weight (Mw) to number-average molecular weight (Mn) of 3 to 5 and exhibits an increase in Mooney viscosity of as little as 10 or less points as measured after the rubber has been allowed to stand in the air at room temperature for 30 days after the above lowering of the Mooney viscosity. This rubber exhibits little viscosity change with the lapse of time and is excellent in processability and storage stability. The rubber can be blended with other heat-resistant rubbers to give heat-resistant rubber compositions, while it can be filled with fibers to give composites excellent in strength characteristics.

Inventors:

FUJII YOSHINORI (JP)
IKEDA ATSUMI (JP)

Application Number:

PCT/JP1997/001099

Publication Date:

October 09, 1997

Filing Date:

March 31, 1997

Export Citation:

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Assignee:

NIPPON ZEON CO (JP)
FUJII YOSHINORI (JP)
IKEDA ATSUMI (JP)

International Classes:

C08K5/00; C08K5/18; C08L15/00; (IPC1-7): C08L15/00; B29B13/00; C08J5/00; C08K5/18; C08K5/41

Foreign References:

JPH03122103A

1991-05-24

Other References: