Patent US2233054A successfully refreshed from Google Patents.
Patent US4343841A successfully refreshed from Google Patents.
US4343841A
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US
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Novel fluoroelastomer film compositions containing phenoxy resins and method for the preparation thereof
Assignee: David Hudson Inc
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Filing: 1980-08-18
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Granted: 1982-08-10
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Expires: 2000-08-18
Abstract
Abstract The invention herein disclosed provides a method for preparing fluoroelastomer film compositions including the steps of dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent, adding a phenoxy resin to the gum solution, evaporating the solvent and baking the resulting film. A method is also provided for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates which includes the steps of dissolving the fluoroelastomer gum in a solvent, adding a phenoxy resin to the gum solution, coating the substrate with the fluoroelastomer gum-phenoxy resin solution, evaporating the solvent and baking the resulting film, leaving a cured film firmly adhered to the substrate. The fluoroelastomer film compositions disclosed herein are also novel and can be used to coat a variety of substrates thereby providing other novel, useful articles.
Inventors
- 👤 Donald Close
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:45
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/12; C08L71/00; C08L71/08; C08L71/10; C08L71/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31511; Y10T428/31525; Y10T428/31529
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
66 words
A method for preparing fluoroelastomer film compositions comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR2## where n is about 100; and evaporating said solvent and baking the resulting film.
Claim 2
Independent Claim
66 words
A method for preparing fluoroelastomer film compositions comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR2## where n is about 100; and evaporating said solvent and baking the resulting film.
Claim 3
Independent Claim
89 words
A method for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR3## where n is about 100; coating said substrate with said fluoroelastomer gum-phenoxy resin solution; and evaporating said solvent and baking the resulting film whereby it is firmly adhered to said substrate.
Claim 4
Independent Claim
89 words
A method for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR3## where n is about 100; coating said substrate with said fluoroelastomer gum-phenoxy resin solution; and evaporating said solvent and baking the resulting film whereby it is firmly adhered to said substrate.
Claim 5
Independent Claim
31 words
A method, as set forth in claims 1 or 2, wherein the amount of said phenoxy resin employed ranges from about one to about 35 parts per 100 parts of rubber.
Claim 6
Dependent Claim
30 words
A method, as set forth in claim 3, including the additional step of adding a synthetic resin, co-reactable with said phenoxy resin, to said phenoxy resin to form a blend.
Claim 7
Dependent Claim
24 words
A method, as set forth in claim 4, wherein said synthetic resin is selected from the group consisting of melamine-formaldehyde, phenolic and urea-formaldehyde resins.
Claim 8
Dependent Claim
30 words
A method, as set forth in claim 5, wherein said synthetic resin is employed in a ratio of phenoxy to synthetic resin of from about 1:1 to 8:1 by weight.
Claim 9
Dependent Claim
47 words
A novel fluoroelastomer film composition comprising: a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in an organic solvent; and a phenoxy resin having the general formula ##STR4## where n is about 100.
Claim 10
Dependent Claim
47 words
A novel fluoroelastomer film composition comprising: a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in an organic solvent; and a phenoxy resin having the general formula ##STR4## where n is about 100.
Claim 11
Dependent Claim
31 words
A novel fluoroelastomer film composition, set forth in claim 7, wherein the amount of said phenoxy resin employed ranges from about one to about 35 parts per 100 parts of rubber.
Claim 12
Dependent Claim
24 words
A novel fluoroelastomer film composition, as set forth in claim 8, wherein said composition also comprises a synthetic resin co-reactable with said phenoxy resin.
Claim 13
Dependent Claim
27 words
A novel fluoroelastomer film composition, as set forth in claim 9, wherein said synthetic resin is selected from the group consisting of melamine-formaldehyde, phenolic and urea-formaldehyde resins.
Claim 14
Dependent Claim
33 words
A novel fluoroelastomer film composition, as set forth in claim 9, wherein said synthetic resin is employed in a ratio of phenoxy to synthetic resin of from about 1:1 to 8:1 by weight.
Claim 15
Independent Claim
61 words
A method for preparing fluoroelastomer film compositions comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR5## where n is about 100; and evaporating said solvent.
Claim 16
Independent Claim
61 words
A method for preparing fluoroelastomer film compositions comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR5## where n is about 100; and evaporating said solvent.
Claim 17
Independent Claim
85 words
A method for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR6## wherein n is about 100; coating said substrate with said fluoroelastomer gum-phenoxy resin solution; and evaporating said solvent, leaving the resulting film firmly adhered to said substrate.
Claim 18
Independent Claim
85 words
A method for adhering fluoroelastomer film compositions, devoid of metallic oxides, to substrates comprising the steps of: dissolving a fluoroelastomer gum selected from the group consisting of copolymers of vinylidene fluoride and hexafluoropropylene, and terpolymers of vinylidene fluoride, hexafluoropropylene and tetrafluoroethylene in a solvent; and adding a phenoxy resin to said gum solution, having the general formula ##STR6## wherein n is about 100; coating said substrate with said fluoroelastomer gum-phenoxy resin solution; and evaporating said solvent, leaving the resulting film firmly adhered to said substrate.
Claim 19
Independent Claim
31 words
A method, as set forth in claims 12 or 13, wherein the amount of said phenoxy resin employed ranges from about one to about 35 parts per 100 parts of rubber.
References Cited (Backward Citations)
GB1228438A
Cited
US3498939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-08-09 | 1986-02-08 | 1986-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-09 | 1990-02-08 | 1990-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-09 | 1994-02-08 | 1994-08-10 | $7700.00 | Window Closed / Lapsed |