Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Processes of preparing a desired or intentional composition...
Patent
1982-03-18
1983-08-23
Smith, John D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Processes of preparing a desired or intentional composition...
156326, 427387, 4273885, 4273898, 4273935, 4274071, 4274072, 4273897, 524188, B05D 302
Patent
active
044004826
ABSTRACT:
The invention herein disclosed provides a method for preparing improved fluoroelastomer film compositions including the steps of dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent, adding a silane compound to the gum solution and curing the fluoroelastomer gum with a silane in the absence of metallic oxides. A method is also provided for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates which includes the steps of dissolving the fluoroelastomer gum in a solvent, adding a silane compound to the gum solution, coating the substrate with the fluoroelastomer gum-silane solution, evaporating the solvent and leaving a film firmly adhered to the substrate. Another method includes the steps of first coating a substrate with a silane compound, then applying a fluoroelastomer gum solution over the silane coated substrate, evaporating the solvent and leaving a film firmly adhered to the substrate. The fluoroelastomer film compositions disclosed herein are also novel and can be used to coat a variety of substrates thereby providing other novel, useful articles.
REFERENCES:
patent: 2979418 (1961-04-01), Dipner
patent: 3379607 (1968-04-01), Foster, et al.
patent: 4143204 (1979-03-01), Fang
Bowman, "Solution Coatings of Viton" (duPont Viton Bulletin No. 16, 1966).
Hackett, "Adhering `Viton` to Metal During Vulcanization" duPont VITON Report VT-450.1.
Alexander, "A Capsule View of the A, B and E Types of `VITON`" duPont VITON Report VT-000.1 (RZ).
Arnold, Barney and Thompson, Rubber Chemistry and Technology, "Fluoroelastomers" 619-653.
David Hudson, Inc.
Page Thurman K.
Smith John D.
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