US4840989A
Expired / Lapsed
US
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Copolymer made from n-vinylamides and perfluoroalkyl group-containing, ethylenically unsaturated compounds, a process for their preparation, and their use
Assignee: Bayer AG
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Filing: 1988-09-26
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Granted: 1989-06-20
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Expires: 2008-09-26
Abstract
Abstract The invention relates to copolymers containing 0.01 to 35 mole-% relative to the total monomer composition, of one or more polymerized perfluoroalkyl group-containing monomer units, 55 to 99.99 mole-% of one or more polymerized N-vinylamide monomer units, and 0 to 10 mole-% of one or more further comonomers, a process for the preparation of the copolymers, and their use as emulsifiers and dispersants in aqueous systems.
Inventors
- 👤 Holger Ohst
- 👤 Wolfgang Podszun
- 👤 Carlhans Suling
- 👤 John Goossens
- 👤 Gunther Penners
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:46
CPC Classifications
C; C08; C08F; C08F226/00; C09; C09K; C09K23/00; C09K23/16
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
54 words
Stabilized aqueous dispersions of inorganic oxides comprising, as a stabilizer, copolymers containing 0.01 to 35 mol-%, relative to the total monomer composition, of one or more polymerized perfluoroalkyl group-containing monomer units, 55 to 99.99 mole-% of one or more polymerized N-vinylamide monomer units, and 0 to 10 mole-% of one or more further comonomers.
Claim 2
Dependent Claim
54 words
Stabilized aqueous dispersions of inorganic oxides comprising, as a stabilizer, copolymers containing 0.01 to 35 mol-%, relative to the total monomer composition, of one or more polymerized perfluoroalkyl group-containing monomer units, 55 to 99.99 mole-% of one or more polymerized N-vinylamide monomer units, and 0 to 10 mole-% of one or more further comonomers.
Claim 3
Dependent Claim
77 words
Stabilized aqueous dispersions according to claim 1, wherein the polymerized perfluoralkyl group-containing monomer units contain saturated, perfluorinated aliphatic alkyl groups which are linear, branched or cyclic, and correspond to the formula I ##STR5## in which R represents hydrogen or C 1 -C 4 -alkyl, A represents --O--, ##STR6## where R 2 represents hydrogen or C 1 -C 10 -alkyl, and R 1 represents C n F 2n+1 , where n denotes an integer from 4 to 20.
Claim 4
Dependent Claim
16 words
Stabilized aqueous dispersions according to claim 1, wherein n denotes an integer from 4 to 12.
Claim 5
Dependent Claim
21 words
Stabilized aqueous dispersions according to claim 1, containing 0.01 to 20 mole-% of one or more polymerized perfluoroalkyl group-containing monomer units.
Claim 6
Dependent Claim
17 words
Stabilized aqueous dispersions according to claim 1, wherein the polymerized N-vinylamide monomer units are cyclic or open-chain.
Claim 7
Dependent Claim
59 words
Stabilized aqueous dispersions according to claim 5 wherein the polymerized cyclic N-vinylamide monomer units correspond to the formula II ##STR7## in which n represents the integers from 0 to 2, and R 3 , R 3' , R 4 and R 5 , independently of one another, represents a hydrogen atom (H) or C 1 -C 4 -alkyl groups.
Claim 8
Dependent Claim
39 words
Stabilized aqueous dispersions according to claim 5, wherein the polymerized open-chain N-vinylamide monomer units correspond to the formula III ##STR8## in which R 6 and R 7 , independent of one another, represent C 1 -C 4 -alkyl groups.
Claim 9
Dependent Claim
27 words
Stabilized aqueous dispersions according to claim 1, wherein said copolymer contain 0.01 to 10 mole-%, relative to the total monomer compositions, of one or more further comonomers.
Claim 10
Dependent Claim
25 words
Stabilized aqueous dispersions according to claim 1, wherein said copolymers are prepared by copolymerizing the mentioned amounts of comonomers in the presence of free-radical initiators.
Claim 11
Dependent Claim
15 words
Stabilized aqueous dispersions according to claim 9, wherein the copolymerization is carried out in solution.
References Cited (Backward Citations)
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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) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |