Curable fluorinated silicone elastomer

Details Curable fluorinated silicone elastomer Curable fluorinated silicone elastomer

1980-10-31

1983-05-31

Briggs, Sr., Wilbert J.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

523213, 524493, 524433, 524436, 525102, 525104, C08L 8306, C08L 8308

Patent

active

043861709

ABSTRACT:
The resistance of a fluorinated silicone elastomer to the effects of exposure to hot fuel, hot oil, and elevated temperature has been improved by the addition of from 0.8 to 5 parts by weight of polytetrafluoroethylene powder to a curable fluorinated silicone elastomeric composition, consisting essentially of a fluorinated polydiorganosiloxane gum having from 45 to 50 percent of the organic radicals being 2-(perfluoroalkyl)ethyl radicals, from 50 to 55 percent of the organic radicals being monovalent hydrocarbon radicals with from 0.1 to 1 percent of the monovalent hydrocarbon radicals being aliphatic unsaturated radicals, and a treated reinforcing silica filler. The resistance is further improved by also including an alkaline earth metal oxide or hydroxide acid acceptor.

REFERENCES:
patent: 2710290 (1955-06-01), Safford et al.
patent: 2927908 (1960-03-01), Konkle et al.
patent: 3132116 (1964-05-01), Wilkus
patent: 3192175 (1965-06-01), Russell
patent: 3630982 (1971-12-01), Matherly
patent: 3669707 (1972-06-01), Donnelly et al.
patent: 4010136 (1977-03-01), Blizzard et al.

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