US3852222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorinated epoxy resins
Assignee: United States Department of the Navy
•
Filing: 1973-06-25
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Granted: 1974-12-03
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Expires: 1993-06-25
Abstract
Abstract Highly fluorinated polymers are synthesized and crosslinked to form fluorinated network polymers.
Inventors
- 👤 D Field
- 👤 J Griffith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:48
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5015; C08G59/00; C08G59/18; C08G59/20; C08G59/22; C08G59/30
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
10 words
A RANDOM EPOXY-TERMINATED COPOLYMER COMPRISING RECURRING UNITS OF THE FORMULA:
Claim 2
Dependent Claim
10 words
A RANDOM EPOXY-TERMINATED COPOLYMER COMPRISING RECURRING UNITS OF THE FORMULA:
Claim 3
Dependent Claim
11 words
A crosslinked random epoxy-terminated copolymer comprising recurring units of the formula:
Claim 4
Dependent Claim
11 words
A crosslinked random epoxy-terminated copolymer comprising recurring units of the formula:
Claim 5
Dependent Claim
28 words
A copolymer according to claim 2, wherein R1 is a urethane derived from an isocyanate selected from the group consisting of hexamethylene diisocyanate, toluene diisocyanate, and derivatives thereof.
Claim 6
Dependent Claim
6 words
A random copolymer comprising the formula:
Claim 7
Dependent Claim
6 words
A random copolymer comprising the formula:
Claim 8
Dependent Claim
9 words
A crosslinked copolymer comprising recurring units of the formula:
Claim 9
Dependent Claim
9 words
A crosslinked copolymer comprising recurring units of the formula:
Claim 10
Dependent Claim
10 words
The polymer of claim 5 wherein R is diethylene triamine.
Claim 11
Dependent Claim
42 words
A reaction process for the production of a highly fluorinated copolymer comprising: reacting fluorinated diols selected from the group consisting of 1,3-Bis(2-Hydroxyhexafluoro-2-propyl)benzene, 2,2,3,3,4,4-Hexafluoro-1,5-Pentanediol, 1,4-Bis(2-Hydroxyhexafluoro-2-propyl)benzene, and mixtures thereof with epichlorohydrin and NaOH in the presence of acetone, and heating the reactants to reflux.
Claim 12
Dependent Claim
42 words
A reaction process for the production of a highly fluorinated copolymer comprising: reacting fluorinated diols selected from the group consisting of 1,3-Bis(2-Hydroxyhexafluoro-2-propyl)benzene, 2,2,3,3,4,4-Hexafluoro-1,5-Pentanediol, 1,4-Bis(2-Hydroxyhexafluoro-2-propyl)benzene, and mixtures thereof with epichlorohydrin and NaOH in the presence of acetone, and heating the reactants to reflux.
Claim 13
Dependent Claim
33 words
A reaction process according to claim 7 wherein the molar amount of epichlorohydrin is equivalent to the molar amount of fluorinated diol and the NaOH is present in excess of said molar amount.
Claim 14
Dependent Claim
23 words
A reaction process according to claim 7 wherein the molar amount of epichlorohydrin is in excess of the molar amount of fluorinated diol.
Claim 15
Dependent Claim
12 words
The copolymer according to claim 4, wherein i is greater than 10.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |