Method of preparing adherent/coherent amorphous fluorocarbon coatings
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United States of America Patent
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Jan 26, 1999
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N/A
app pub date -
Dec 16, 1992
filing date -
Apr 10, 1990
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Abstract
A method for preparing a castable amorphous fluorocarbon coating upon the surface of a substrate which includes the steps of initially depositing a film of a fluorocarbon having a thickness between about 1500 .ANG. and 50,000 .ANG., and thereafter applying a second coating as a coverlay upon the initial film. Both the initial film and the castable coating consist of an amorphous fluorinated (ethylenic-cyclo oxyaliphatic substituted ethylenic) copolymer having the structural repeating unit: ##STR1## wherein 'm' and 'n' represent integers providing a molecular weight of between about 230,000 and 500,000, with the relative values of 'm' and 'n' providing a copolymer with a glass transition temperature ranging from between about 160.degree. C. and 240.degree. C.
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