US3850674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating a fiberglass laminate and the coated laminate
Assignee: Olin Corp
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Filing: 1973-04-30
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Granted: 1974-11-26
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Expires: 1993-04-30
Abstract
Abstract The present invention relates to coatings based on copolymers of hexafluoropropylene and vinylidene fluoride and on terpolymers of tetrafluorethylene, vinylidene fluoride and hexafluoropropylene, and to a method for applying the same to provide a coating which is curable at room temperature, which resists peeling when applied to fiberglass laminates and which is highly resistant to erosion by wind, rain and hail. In accordance with the invention, a primer of uncrosslinked low molecular weight copolymer having a Mooney Viscosity of 25-40 and provided with active crosslink sites is first applied to the substrate. A top coat is applied over the primer, said top coat containing copolymer or terpolymer provided with active crosslink sites and a crosslink agent.
Inventors
- 👤 G Clarke
- 👤 R Colafati
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:46
CPC Classifications
B; B29; B29C; B29C70/00; B29K; B29K2309/00; B29K2309/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2951; Y10T428/31504; Y10T428/3154; Y10T428/31544; Y10T428/31551; Y10T428/31645
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
92 words
IN A METHOD OF TREATING A FIBERGLASS LAMINATE TO PROVIDE A COATING THEREON HAVING IMPROVED PEEL AND EROSION RESISTANCE, WHEREIN SAID LAMINATE IS COATED WITH A POLYMER SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF HEXAFLUOROPROPYLENE AND VINYLIDENE FLUORIDE AND TERPOLYMERS OF TETRAFLUOROETHYLENE, VINYLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE AND THEREAFTER CURED FOR AT LEAST 2 HOURS AT A TEMPERATURE OF 60*-350*F., THE IMPROVEMENT COMPRISING: FIRST COATING SAID LAMINATE WITH A PRIMER COMPRISING AN UNCROSSLINKED HEXAFLUOROOPROPYLENE-VINYLIDENE FLUORIDE COPOLYMER WHICH HAS BEEN PROVIDED WITH ACTIVE CROSSLINK SITES AND WHICH HAS A MOONEY VISCOSITY OF 25-40.
Claim 2
Dependent Claim
92 words
IN A METHOD OF TREATING A FIBERGLASS LAMINATE TO PROVIDE A COATING THEREON HAVING IMPROVED PEEL AND EROSION RESISTANCE, WHEREIN SAID LAMINATE IS COATED WITH A POLYMER SELECTED FROM THE GROUP CONSISTING OF COPOLYMERS OF HEXAFLUOROPROPYLENE AND VINYLIDENE FLUORIDE AND TERPOLYMERS OF TETRAFLUOROETHYLENE, VINYLIDENE FLUORIDE AND HEXAFLUOROPROPYLENE AND THEREAFTER CURED FOR AT LEAST 2 HOURS AT A TEMPERATURE OF 60*-350*F., THE IMPROVEMENT COMPRISING: FIRST COATING SAID LAMINATE WITH A PRIMER COMPRISING AN UNCROSSLINKED HEXAFLUOROOPROPYLENE-VINYLIDENE FLUORIDE COPOLYMER WHICH HAS BEEN PROVIDED WITH ACTIVE CROSSLINK SITES AND WHICH HAS A MOONEY VISCOSITY OF 25-40.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein the copolymer of said primer has a monomer ratio of about 30% vinylidene fluoride and 70% hexafluoropropylene.
Claim 4
Dependent Claim
19 words
The method of claim 1 wherein the copolymer of said primer has a molecular weight of 25,000 to 50,000.
Claim 5
Dependent Claim
17 words
The method of claim 1 wherein the copolymer of said primer has a Mooney Viscosity of 30-35.
Claim 6
Dependent Claim
47 words
The method of claim 1 wherein active crosslink sites are provided by reacting the copolymer of said primer with an amine selected from the group consisting of ethylamine, propylamine, allylamine, diethylamine, diisopropylamine, di-n-butylamine, diamylamine, diisobutylamine, di-n-octylamine, diallylamine, triethylamine, tripropylamine, triamylamine and tetramethylguanidine at a temperature of 225*-325*F.
Claim 7
Dependent Claim
33 words
The method of claim 5 wherein the polymer selected from said group is a co-polymer of hexafluoropropylene and vinylidene fluoride having a monomer ratio of about 70% hexafluoropropylene and about 30% vinylidene fluoride.
Claim 8
Dependent Claim
10 words
A coated fiberglass laminate produced by the method of claim
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-11-25 | 1978-05-27 | 1978-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-25 | 1982-05-27 | 1982-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-25 | 1986-05-27 | 1986-11-26 | $7700.00 | Window Closed / Lapsed |