Nitrile group-containing fluoroelastomer and preparation...

Details Nitrile group-containing fluoroelastomer and preparation... Nitrile group-containing fluoroelastomer and preparation...

2005-01-11

2005-01-11

Lipman, Bernard (Department: 1713)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S326400, C525S359300, C525S378000, C525S379000

Reexamination Certificate

active

06841625

ABSTRACT:
To provide a solid fluoroelastomer having nitrile group at the, end which gives a crosslinked product being excellent in heat resistance, solvent resistance, chemical resistance, compression set and cleanliness, and an economical process for preparation thereof. The process for preparing a nitrile group-containing fluoroelastomer by converting amide group contained in a polymer molecular chain of a solid fluoroelastomer into nitrile group in the presence of a dehydrating agent.

REFERENCES:
patent: 4599386 (1986-07-01), Carlson et al.
patent: 5019630 (1991-05-01), Chida et al.
patent: 5115038 (1992-05-01), Ihara et al.
patent: 5547911 (1996-08-01), Grot
patent: 1-115933 (1989-05-01), None
International Search Report for PCT/JP00/01913 dated Jul. 4, 2000.
International Preliminary Examination Report for PCT/JP00/01913 dated Jun. 6, 2001.

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