Back to results
US 7,396,499 B2Granted
Multiple layered membrane with fluorine containing polymer layer
OwnerThomas E Frankel, Seoung-il Kang +2inventors
InventorsThomas E Frankel, Seoung-il Kang, Todd David Ritter, Hong-suk Kim
Life of this patent
Estimating the term…
Abstract
A multi-layer article includes a fluoropolymer layer and a substrate which are joined permanently through a multi-step cross-linking technique.
Claims18
A process for preparing a multi-layer article, comprising the steps of:
- (a) placing a substrate in a mold, and wherein said substrate alone is first pre-cured to an incomplete state of cure in said mold at a temperature of 75 to 125 C.
- (b) an uncured fluoroelastomer layer of up to about 0.3 mm thickness is placed on said pre-cured substrate of step (a) and said layers are cured together in said mold at a temperature of 150 to 225 C to form an intermediate article, and
- (c) removing said intermediate article of step (b) from said mold and curing it in an oven at a temperature of 100 to 150 C such that the cross linking of the layers forms a permanent bond between said substrate and said fluoroelastomer layer and thereby forming said multi-layer article.
A process for preparing a multi-layer article, comprising the steps of:
- (a) placing a substrate in a mold, and wherein said substrate alone is first pre-cured to an incomplete state of cure in said mold at a temperature of 75 to 125 C.
- (b) an uncured fluoroelastomer layer of up to about 0.3 mm thickness is placed on said pre-cured substrate of step (a) and said layers are cured together in said mold at a temperature of 150 to 225 C to form an intermediate article, and
- (c) removing said intermediate article of step (b) from said mold and curing it in an oven at a temperature of 100 to 180 C such that the cross linking of the layers forms a permanent bond between said substrate and said fluoroelastomer layer and thereby forming said multi-layer article.
Dependencies are inferred from the claim text.