US4592930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfluorocarbon based polymeric coatings having low critical surface tensions
Assignee: Dow Chemical Co
•
Filing: 1985-09-16
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Granted: 1986-06-03
•
Expires: 2005-09-16
Abstract
Abstract Polymers comprising pendant rearranged oxazoline and/or oxazine portions linked to a perfluorocarbon moiety having a perfluoroalkyl group are prepared. Such polymers can provide coating compositions which exhibit critical surface tensions of wetting of less than about 15 dynes/cm.
Inventors
- 👤 Donald L. Schmidt
- 👤 Robert F. Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:49
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
94 words
A process for reducing the amount of sticking of material on the internal surfaces of a molding apparatus which comprises applying a solution of a polymer having pendant rearranged oxazoline and/or oxazine portions linked through an amide-ester linkage to a perfluorocarbon moiety having a perfluoroalkyl group and having a recurring unit of the formula: ##STR6## wherein, A is hydrogen or methyl, R F is a saturated perfluoroaliphatic moiety, Y 1 is a hydrocarbon moiety containing at least 2 carbon atoms, and R 1 is the remaining portion of a rearranged oxazoline or oxazine moiety.
Claim 2
Dependent Claim
94 words
A process for reducing the amount of sticking of material on the internal surfaces of a molding apparatus which comprises applying a solution of a polymer having pendant rearranged oxazoline and/or oxazine portions linked through an amide-ester linkage to a perfluorocarbon moiety having a perfluoroalkyl group and having a recurring unit of the formula: ##STR6## wherein, A is hydrogen or methyl, R F is a saturated perfluoroaliphatic moiety, Y 1 is a hydrocarbon moiety containing at least 2 carbon atoms, and R 1 is the remaining portion of a rearranged oxazoline or oxazine moiety.
Claim 3
Dependent Claim
31 words
The process of claim 1 including the additional step of curing the polymer applied to provide a resultant coating having a critical surface tension of wetting less than about 15 dynes/cm.
Claim 4
Dependent Claim
94 words
The process of claim 1 wherein the polymer is 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 5
Dependent Claim
10 words
A process of claim 3 wherein b=0, c=0 and d=0.
Claim 6
Dependent Claim
9 words
The process of claim 3 wherein b=0 and d=0.
Claim 7
Dependent Claim
27 words
The process of claim 15 having repeating units of the formula: ##STR8## wherein A is hydrogen or methyl, and x is from about 3 to about 18.
Claim 8
Dependent Claim
32 words
The process of claim 1 wherein R 1 is ##STR9## where n is 0 or 1, and each of R 2 is independently hydrogen, alkyl, aralkyl, hydroxyalkyl, phenyl or inertly substituted phenyl.
Claim 9
Dependent Claim
11 words
The process of claim 7 wherein each of R is hydrogen.
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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) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |