Fluoroelastomer coated silicone rubber
AssigneeDow Corning Corporation
InventorKeith E. Polmanteer
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Abstract
Silicone rubber articles that are resistant to abrasion, permeation of gases and accumulation of dirt particles have an adherant coating on at least one surface of the article. The coating is derived from a peroxide-curable fluoroelastomer gum composition which contains (1) an epoxide compound in an amount sufficient to react with the acidic by-products generated during curing of the elastomer, and (2) an organic peroxide in an amount sufficient to achieve curing of the fluoroelastomer gum at elevated temperatures.
Claims21
An article of manufacture comprising a silicone rubber substrate having a cured coating on at least one surface thereof, said coating being cohesively bonded to the substrate and comprising in the uncured state (a) a peroxide-curable fluoroelastomer gum wherein the repeating units are derived from the polymerization of at least one fluorine-containing ethylenically unsaturated organic compound, (b) an amount of an organic peroxide sufficient to achieve curing of said fluoroelastomer gum at a temperature of from 100.degree. to 200.degree. C. and (c) an amount of an epoxide compound sufficient to react with the acidic by-products evolved during curing of said fluoroelastomer gum.
Dependencies are inferred from the claim text.