Patent EP0125955A2 successfully refreshed from Google Patents.
EP0125955A2
Expired / Lapsed
EP
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Novel reinforced fluoropolymer composite and method for making same
Assignee: Saint Gobain Performance Plastics Corp
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Filing: 1984-04-13
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Granted: —
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Expires: 2004-04-13
Abstract
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.
Inventors
- 👤 John A. Effenberger
- 👤 Frank M. Keese
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-03 18:41
CPC Classifications
D; D06; D06N; D06N3/00; D06N3/04; D06N3/047; D06N7/00
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
56 words
1 . A composite which comprises a substrate coated with a matrix comprising: A) an initial layer of a perfluoropolymer selected from the group comprising a perfluoroplastic, a perfluoroelastomer, a blend of perfluoroplastic and perfluoroelastomer, or any combination thereof; and B) an overcoat layer of a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or any combination thereof.
Claim 2
Dependent Claim
56 words
1 . A composite which comprises a substrate coated with a matrix comprising: A) an initial layer of a perfluoropolymer selected from the group comprising a perfluoroplastic, a perfluoroelastomer, a blend of perfluoroplastic and perfluoroelastomer, or any combination thereof; and B) an overcoat layer of a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or any combination thereof.
Claim 3
Dependent Claim
17 words
A composite according to claim 1 wherein the initial layer comprises a perfluoropolymer and a lubricating agent.
Claim 4
Dependent Claim
18 words
A composite according to claim 1 wherein the substrate is treated with a coupling agent to promote bonding.
Claim 5
Dependent Claim
34 words
A composite according to claim 1 wherein said overcoat layer comprises a blend of a fluoroelastomer and a fluoroplastic, wherein the fluoroelastomer comprises from about 10% to about 90% by weight of the blend.
Claim 6
Dependent Claim
19 words
A composite according to claim 4 wherein said fluoroelastomer comprises from 25% to 60% by weight of said blend.
Claim 7
Dependent Claim
23 words
A composite according to claim 4 wherein an intermediate layer comprising a fluoroelastomer is interposed between said initial layer and said overcoat layer.
Claim 8
Dependent Claim
24 words
A composite according to claim 1 having a topcoat selected from the group comprising.a fluoroplastic, a fluoroelastomer, a fluoroplastic/fluoroelastomer blend or a combination thereof.
Claim 9
Dependent Claim
17 words
A composite according to claim 1 wherein resins . in said layers are at least partially crosslinked.
Claim 10
Dependent Claim
18 words
A composite according to claim 1 wherein only one face of said substrate is coated with a matrix.
Claim 11
Dependent Claim
18 words
A composite according to claim 1 wherein said substrate is reinforcement material capable of withstanding composite formation temperatures.
Claim 12
Dependent Claim
20 words
ll. A composite according to claim 10 wherein said substrate is a yarn, filament, monofilament, or . other fibrous material.
Claim 13
Dependent Claim
21 words
A composite according to claim 10 wherein said substrate is a textile selected from the group comprising woven and non-woven materials.
Claim 14
Dependent Claim
45 words
A composite according to claims 1 or 12 wherein said substrate is selected from the group comprising glass, fiberglass, ceramics, graphite (carbon), polybenzimidazole, polyaramides, PTFE metal, polyolefins, polyesters, polyamides, copolymers of TFE, polyether sulfones, polyimides polyether ketones, polyethenimides, novoloid phenolic fibers, natural and synthetic textiles.
Claim 15
Dependent Claim
16 words
A composite according to claims 1 or 7 wherein said fluoroplastic comprises PTFE, PFA or FEP.
Claim 16
Dependent Claim
39 words
A composite according to claims 1 or 7 wherein said fluoroelastomer is selected from the group comprising copolymers of vinylidene fluoride and at least one other fluorinated monomer selected from the group comprising hexafluoropropylene; tetrafluoroethylene; chlorotrifluoroethylene; and pentafluoropropylene. -
Claim 17
Dependent Claim
14 words
A composite according to claim 1 wherein said perfluoroplastic comprises PTFE, PFA or FEP.
Claim 18
Dependent Claim
21 words
A composite according to claim 1 wherein said perfluoroelastomer comprises a copolymer of TFE and perfluorovinylether such as PMVE or PPVE.
Claim 19
Dependent Claim
37 words
A composite according to claim 1 wherein any fluoropolymer component may contain a functional group selected from the group comprising carboxyl and sulfonic acid and salts thereof, halogen, and a reactive hydrogen on an alkyl side chain.
Claim 20
Dependent Claim
17 words
A composite which comprises a substrate coated with a layer comprising a perfluoroelastomer or a perfluoroelastomer/perfluoroplastic blend.
Claim 21
Dependent Claim
17 words
A composite which comprises a substrate coated with a layer comprising a perfluoroelastomer or a perfluoroelastomer/perfluoroplastic blend.
Claim 22
Dependent Claim
27 words
A composite which comprises a substrate which is insusceptible to the corrosive effects of hydrogen fluoride and which is coated with a matrix comprising a fluoroelastomer/perfluoroplastic blend.
Claim 23
Dependent Claim
27 words
A composite which comprises a substrate which is insusceptible to the corrosive effects of hydrogen fluoride and which is coated with a matrix comprising a fluoroelastomer/perfluoroplastic blend.
Claim 24
Independent Claim
79 words
A method for the manufacture of a composite including a substrate coated with a matrix, wherein the said matrix is formed by a gradation of fluoropolymer layers, which comprises the steps of: i) first applying an initial layer comprising a perfluoropolymer in an amount sufficient to substantially shield the substrate from chemical corrosion without impairing flexibility; ii) thereafter applying to said initial layer an overcoat layer comprising a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or ` a combination thereof.
Claim 25
Independent Claim
79 words
A method for the manufacture of a composite including a substrate coated with a matrix, wherein the said matrix is formed by a gradation of fluoropolymer layers, which comprises the steps of: i) first applying an initial layer comprising a perfluoropolymer in an amount sufficient to substantially shield the substrate from chemical corrosion without impairing flexibility; ii) thereafter applying to said initial layer an overcoat layer comprising a fluoroelastomer, a fluoroplastic, a fluoroelastomer/fluoroplastic blend, or ` a combination thereof.
Claim 26
Dependent Claim
20 words
A method according to claim 21 wherein said initial layer comprises a perfluoropolymer, a lubricating agent, and a coupling agent.
Claim 27
Dependent Claim
15 words
A method according to claim 21 wherein the outermost layer is applied as a foam.
References Cited (Backward Citations)
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