Reinforced fluoropolymer composite

Details Reinforced fluoropolymer composite Reinforced fluoropolymer composite

1992-10-22

1993-07-27

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including grain, strips, or filamentary elements in...

428220, 428245, 428251, 428252, 428262, 428265, 428267, 428268, 428286, 428287, 428378, 428392, 428421, 428422, B32B 704, B32B 2712

Patent

active

052309371

ABSTRACT:
A novel composite comprises a substrate having a coating matrix including an initial layer of a perfluoropolymer and an overcoat comprising a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or a combination thereof. The perfluoropolymer in the initial layer may be a perfluoroplastic, a perfluoroelastomer, or blends thereof. In a separate embodiment, the novel composite includes a substrate coated solely with one or more layers of perfluoroelastomer alone or as a blend with a perfluoroplastic. Where the substrate is not susceptible to hydrogen fluoride corrosion, the composite may include solely one or more layers of a blend of a fluoroelastomer and a hydrogen-containing perfluoroplastic. Cross-linking accelerators may be used to cross-link one or more of the resins contained in the coating layers. Each composite may be top-coated with a layer or layers of a fluoroplastic, fluoroelastomer, and/or a blend thereof. The composite is flexible, exhibits good matrix cohesion and possesses substantial adhesion of the matrix to the material acting as the reinforcement or substrate. A method for making such a composite comprises the unique deployment of a perfluoropolymer directly onto the substrate in a relatively small amount sufficient to protect the substrate from chemical corrosion without impairing flexibility, followed by the application of the overcoat layer.

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Bulletin #28, Armalon.RTM. TT-9001, "Here's another new development . . . from the Industrial Products Division at Dupont", Nov. 1, 1971.
Industrial fabrics, Fairprene.RTM., Corfam.RTM., Armalon.RTM., Dupont, 1969.

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