DE125955T1 - REINFORCED MULTILAYERED FLUOROPOLY MATERIAL AND METHOD FOR THE PRODUCTION THEREOF. - Google Patents

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 topcoated with the 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.

Claims (23)

in North Bennington Vermont, United States of America claims 1. A composite comprising a substrate which is composed of a matrix A) a starting layer of a perfluoropolymer _; selected from the group consisting of a perfluoroplastic, a perfluoroelastomer, a mixture of perfluoroplastic and perfluoroelastomer or any combination thereof / and B) a coating layer made of a fluoroelastomer, a fluoroplastic, a fluoroelastomer / fluoroplastic blend, or any combination thereof, '. -: . . is coated. 2. The composite of claim 1, wherein the starting layer is a Perfluoropolymer and a lubricant. ; 3. The composite of claim 1, wherein the substrate with a Coupling agent is treated to promote bonding. 4. Association according to claim. 1, wherein this coating layer comprises a mixture of a fluoroelastomer and a fluoroplastic, wherein the fluoroelastomer comprises from about 10 to about 90% Constitutes% by weight of the mixture. 25th 5. The composite of claim 4 wherein said fluoroelastomer makes up from 25 to 60% by weight of this mixture. 6. The composite of claim 4, wherein an intermediate layer, consisting of a fluoroelastomer,! is inserted between this starting layer and this coating layer. 7. The composite of claim 1, the one cover layer selected from the group consisting of a fluoroplastic, a fluoroelastomer, a fluoroplastic / fluoroelastomer mixture or a combination thereof. 8. The composite according to claim 1, wherein resins in these layers are at least partially cross-linked. 9. The composite of claim 1, wherein only one surface thereof Substrate is coated with a matrix. 10. The composite of claim 1 wherein said substrate is reinforcing material represents that can withstand bond formation temperatures. 11. The composite of claim 10, wherein said substrate is a yarn, fiber, monofilament, or other fibrous Material is. 12. The composite of claim 10, wherein said substrate is a ■ Textile material selected from the group consisting of woven and non-woven materials. 13. Composite according to claims 1 or, 12 ,, wherein this Substrate is selected from the group consisting of glass, fiberglass, ceramic, graphite (carbon), polybenzimidazoles Polyaramids, PTFE, metal, polyolefins, polyesters, polyamides, TFE copolymers, polyether sulfones, polyimides, Polyether ketones, polyethenimides, novoloid phenolic fibers, natural and synthetic textiles. 14. Composite according to claims 1 to 7, wherein this fluoroplastic comprises PTFE, PFA or FEP. 15. The composite of claims 1 or 7, wherein said fluoroelastomer is selected from the group consisting of from vinylidene fluoride copolymers and at least one other fluorinated monomer selected from Group consisting of hexafluoropropylene, tetrafluoroethylene, Chlorotrifluoroethylene and pentafluoropropylene. 16. The composite of claim 1, wherein said perfluoroplastic Includes PTFE, PFA or FEP. 17. The composite of claim 1 wherein said perfluoro stomer a copolymer of TFE and perfluorovinyl ether, such as PMVE or PPVE. 18. The composite of claim 1, wherein each fluoropolymer component has a functional group selected from Group consisting of carboxylic and sulfonic acids and their salts, halogen and a reactive hydrogen on one Alkyl side chain. 19. Composite, which consists of a one-layer made of a perfluoroelastomer or a perfluoroelastomer / Perfluoroplastic mixture, coated substrate. 20. Composite, which protects against the effects of corrosion Hydrogen fluoride not sensitive and with one out a fluoroelastomer / perfluoroplastic mixture Matrix coated substrate. 21. A method of making a composite including a matrix coated substrate, wherein this matrix is formed by means of a gradation of fluoropolymer layers, which the following steps includes: i) first a starting layer, consisting of a perfluoropolymer in an amount sufficient to to essentially protect the substrate from chemical corrosion without impairing flexibility, upset. ii) then a coating layer consisting of a fluoroelastomer, a fluoroplastic, a fluoroelastomer stomer / fluoroplastic mixture or a combination of it, applied to this starting layer. 22. The method of claim 21, wherein said starting layer a perfluoropolymer, a lubricant and a coupling agent. 23. The method of claim 21, wherein the outermost layer is applied as a foam.