US3872045A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated epoxy resins containing polytetrafluoroalkylene fillers
Assignee: United States Department of the Navy
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Filing: 1973-08-22
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Granted: 1975-03-18
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Expires: 1993-08-22
Abstract
Abstract Highly fluorinated polymers are synthesized and crosslinked to form fluorinated network polymers. These polymers are formed into paints by dissolving them into a solvent containing a pigment and extending the polymers with fluorinated fillers.
Inventors
- 👤 Donald E Field
- 👤 James R Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:30
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G18/58; C08G18/582; C09; C09D; C09D163/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
17 words
A COATING COMPRISING A SOLUTION OF AN EPOXY - TERMINATED POLYMER HAVING RECURRING UNITS OF THE FORMULA
Claim 2
Dependent Claim
17 words
A COATING COMPRISING A SOLUTION OF AN EPOXY - TERMINATED POLYMER HAVING RECURRING UNITS OF THE FORMULA
Claim 3
Dependent Claim
24 words
A coating according to claim 1 wherein said crosslinking agent is selected from the group consisting of hexamethylene diisocyanate, toluene diisocyanate, and derivatives thereof.
Claim 4
Dependent Claim
22 words
A coating according to claim 1 wherein said polymeric extender is selected from the group consisting of polytetrafluoroethylene and fluorinated ethylene-propylene copolymer.
Claim 5
Dependent Claim
23 words
A coating according to claim 1 wherein the amount of crosslinking agent present is about stoichiometrically equivalent to the amount of polymer present.
Claim 6
Dependent Claim
15 words
A coating comprising a 50% by weight solution of an epoxy-terminated polymer of the formula
Claim 7
Dependent Claim
15 words
A coating comprising a 50% by weight solution of an epoxy-terminated polymer of the formula
Claim 8
Dependent Claim
42 words
A coating according to claim 5 wherein said crosslinking agent is selected from the group consisting of hexamethylene diisocyanate, toluene diisocyanate and derivatives thereof and said crosslinking agent is present in a stoichiometric amount about equal to the amount of polymer present.
Claim 9
Dependent Claim
11 words
A coating comprising a solution of a polymer of the formula
Claim 10
Dependent Claim
11 words
A coating comprising a solution of a polymer of the formula
Claim 11
Dependent Claim
13 words
A coating according to claim 7 wherein said crosslinking agent is diethylene triamine.
Claim 12
Dependent Claim
22 words
A coating according to claim 7 wherein said polymeric extender is selected from the group consisting of polytetrafluoroethylene and fluorinated ethylene-propylene copolymer.
Claim 13
Dependent Claim
24 words
A coating composition according to claim 7 wherein the amount of crosslinking agent present is about stoichiometrically equivalent to the amount of polymer present.
Claim 14
Dependent Claim
14 words
A coating comprising a 50% by weight solution of a polymer of the formula
Claim 15
Dependent Claim
14 words
A coating comprising a 50% by weight solution of a polymer of the formula
Claim 16
Dependent Claim
28 words
A coating according to claim 11 wherein said crosslinking agent is diethylene triamine and is present in an amount about stoichiometrically equivalent to the amount of polymer present.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |