Expanded high-temperature stable chemical resistant seal materia

Details Expanded high-temperature stable chemical resistant seal materia Expanded high-temperature stable chemical resistant seal materia

1986-09-22

1988-09-27

Hearn, Brian E.

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

429 34, 429 35, 429179, 429185, H01M 208

Patent

active

047741546

ABSTRACT:
A seal material having improved sealing characteristics and useful in high temperature, corrosive environments, particularly fuel cells is disclosed. The material comprises an acid resistant, high temperature stable fluorinated elastomer and a blowing agent which activate at a temperature within the range of curing temperatures of the elastomer. Improved sealing characteristics due to volume expansion of the seal material applied and activated within the fuel cell were observed. The process of activating the seal material at the operating temperature of the fuel cell is also disclosed.
The invention also discloses the process of using the seal material within a fuel cell.

REFERENCES:
patent: 3868337 (1975-02-01), Gros
patent: 4174244 (1979-11-01), Thomas et al.
patent: 4374185 (1983-02-01), Powers et al.
patent: 4385018 (1983-05-01), Kutnak

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