Patent US4764564A successfully refreshed from Google Patents.
US4764564A
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Perfluorocarbon based polymeric coatings having low critical surface tensions
Assignee: Dow Chemical Co
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Filing: 1986-06-23
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Granted: 1988-08-16
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Expires: 2006-06-23
Abstract
Abstract Polymers comprising pendant amine-functional portions linked to a perfluorocarbon moiety having a perfluoroalkyl group. Such polymers can provide coating compositions which exhibit critical surface tensions of wetting of less than about 15 dynes/cm.
Inventors
- 👤 Donald L. Schmidt
- 👤 Demetrius Urchick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:37
CPC Classifications
C; C09; C09D; C09D133/00; C09D133/24; C09D133/26; C08; C08F; C08F8/00; C08F8/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
43 words
A polymer composition comprising pendant amine-functional portions linked to a perfluorocarbon moiety having a perfluoroalkyl group through a carboxy group and having repeating units of the formula: ##STR6## wherein A is hydrogen or methyl, and x is from about 3 to about 18.
Claim 2
Dependent Claim
43 words
A polymer composition comprising pendant amine-functional portions linked to a perfluorocarbon moiety having a perfluoroalkyl group through a carboxy group and having repeating units of the formula: ##STR6## wherein A is hydrogen or methyl, and x is from about 3 to about 18.
Claim 3
Dependent Claim
90 words
A composition of claim 1 represented by the formula: ##STR7## wherein a+b+c+d=1, a is greater than 0, b is from about 0 to about 0.9, c is from about 0 to about 0.9, d is from 0 to about 0.8, m is from about 100 to about 10,000, X is an essentially nonionic or ionic moiety and Y is the remaining portion of a polycarboxylic acid and is present in such a way that crosslinking is introduced to the polymer system, and R A is an alkyl or aryl moiety.
Claim 4
Dependent Claim
10 words
A composition of claim 2 wherein b=0, c=0 and d=0.
Claim 5
Dependent Claim
9 words
A composition of claim 2 wherein b=0 and d=0.
Claim 6
Dependent Claim
9 words
An adherent composition comprising the polymer of claim 2.
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) | 1991-08-16 | 1992-02-15 | 1992-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-16 | 1996-02-15 | 1996-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-16 | 2000-02-15 | 2000-08-16 | $7700.00 | Window Closed / Lapsed |