Process for the production of heat-stable moldings useful as a f

Details Process for the production of heat-stable moldings useful as a f Process for the production of heat-stable moldings useful as a f

1994-12-21

1996-03-26

Henderson, Christopher

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

Synthetic resins

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

523149, 523156, 524511, 525139, C08L 906

Patent

active

055021093

ABSTRACT:
Heat-stable moldings for brake linings, clutch linings and grinding tools are produced by molding and vulcanizing a mixture containing a natural or synthetic rubber in the presence of a sulfur-free vulcanizer/activator system comprising phenol resols which contain at least 90 mol % of p-(C.sub.3 -C.sub.12)-alkylphenols, based on the total amount of phenols, and a substance, or mixture of substances, which acts as a Bronsted or Lewis acid under the reaction conditions of the rubber-vulcanization, at a temperature of 120.degree. to 250.degree. C.

REFERENCES:
patent: 4316827 (1982-02-01), Pacala
patent: 4320823 (1982-03-01), Covaleski
patent: 4725650 (1988-02-01), Landi
Copy of Derwent Abstract (1 page) AN-93-293509 (37).

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