Shelf-stable one-part room temperature vulcanizing fluorosilicone compositions
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United States of America Patent
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Oct 11, 1994
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app pub date -
Dec 14, 1992
filing date -
Dec 14, 1992
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Abstract
A method for continuously producing a room temperature vulcanizable composition is disclosed. A base mixture of a silanol stopped fluorosilicone polymer, a silica filler and iron oxide are processed in an extruder at an elevated temperature between about 50 and 200.degree. C. Thereafter, a tin based catalyst, an acetoxy cross-linking agent and an optional adhesion promoter are added to the extruder near the exit port. The resulting material has improved storage stability.
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