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US5285002A
Expired / Lapsed
US
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Fluorine-containing polymers and preparation and use thereof
Assignee: 3M Co
•
Filing: 1993-03-23
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Granted: 1994-02-08
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Expires: 2013-03-23
Abstract
Abstract Fluoroalkyl sulfinates were synthesized and used as a source of fluoroalkyl radicals in aqueous emulsion polymerization. The resulting polymers contained a high level of perfluoroalkyl end groups. When fluoroalkyl disulfinates were utilized, the fluoroalkyl moiety and was incorporated in the polymer backbone. These disulfinates act as monomers, yielding fluoropolymers with specific micro structural fragments, derived from the parent perfluoro disulfinate. Novel fluoropolymers can thus be prepared.
Inventors
- 👤 Werner M. Grootaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:29
CPC Classifications
C; C08; C08F; C08F14/00; C08F14/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
A method for the preparation of fluorine-containing polymer comprising, polymerizing, under free-radical conditions, an aqueous emulsion or suspension of a polymerizable mixture comprising a fluoroaliphatic-radical containing sulfinate, and an oxidizing agent capable of oxidizing said sulfinate to a sulfonyl radical.
Claim 2
Independent Claim
40 words
A method for the preparation of fluorine-containing polymer comprising, polymerizing, under free-radical conditions, an aqueous emulsion or suspension of a polymerizable mixture comprising a fluoroaliphatic-radical containing sulfinate, and an oxidizing agent capable of oxidizing said sulfinate to a sulfonyl radical.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said polymerizable mixture further comprises fluorine-containing ethylenically unsaturated monomer.
Claim 4
Dependent Claim
35 words
The method of claim 2 wherein said fluorine-containing monomer is selected from the group consisting of vinylidene fluoride, hexafluoropropene, chlorotrifluoroethylene, 1-chloropentafluoropropene, perfluoroalkyl vinyl ethers, tetrafluoroethylene, 1-hydropentafluoropropene, dichlorodifluoroethylene, 2-hydropentafluoropropene, vinyl fluoride, trifluoroethylene, 1,1-dichlorofluoroethylene, perfluorodiallylether, and perfluoro-1,3-dioxoles.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said polymerizable mixture further comprises fluorine-free ehtylenically unsaturated monomer.
Claim 6
Dependent Claim
11 words
The method of claim 1 wherein said oxidizing agent is water-soluble.
Claim 7
Dependent Claim
21 words
The method of claim 1 wherein said oxidizing agent is selected from the group consisting of sodium, potassium, and ammonium persulfates.
Claim 8
Dependent Claim
40 words
The method of claim 1 wherein said sulfinate is R f (SO 2 M 1/x ) n where R f is fluoroaliphatic radical, M is a hydrogen atom or a cation of valence x, and n is 1 or 2.
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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) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |