Back to results
US 2002/0002219 A1Published application
In situ fluoropolymer polymerization into porous substrates
AssigneeE. I. Du Pont de Nemours and Company
InventorsJoy Sawyer Bloom, Kiu-Seung Lee, Robert Clayton Wheland
Life of this patent
Estimating the term…
Abstract
The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to wear, tear and creep, decay, and degradation by wetting, staining and warping, and to improve durability while maintaining the appearance of the substrate.
Claims24
A process for preparing a fluoropolymer/substrate composition, comprising:
- in the case of gaseous fluoromonomer
- (a) contacting a porous substrate with a solution comprising an initiator dissolved in a suitable solvent;
- (b) exposing said substrate and said initiator to gaseous fluoromonomer under polymerization temperature and pressure conditions wherein the fluoromonomer polymerizes into said substrate;
- or in the case of liquid fluoromonomer
- (a) preparing a solution comprising initiator and liquid fluoromonomer;
- (b) contacting a porous substrate with said solution;
- and
- (c) polymerizing the liquid fluoromonomer under polymerization temperature and pressure conditions wherein the fluoromonomer polymerizes into said substrate, optionally in the presence of gaseous fluoromonomer.
5 more elements
A composition of matter, comprising:
- a substrate having a surface wherein the substrate further comprises polymerized fluoropolymer, and wherein the substrate is an open pore structure having interconnecting pores throughout said substrate, and wherein fluoropolymer is present within and on the surface of said composition at a level from about 0.1 percent to about 300 percent of the weight of said substrate.
Dependencies are inferred from the claim text.