US4486554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of anionic and cationic polymers from 2-oxazolines
Assignee: Dow Chemical Co
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Filing: 1983-08-19
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Granted: 1984-12-04
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Expires: 2003-08-19
Abstract
Abstract Anionic and cationic polymers are prepared by vinyl polymerizing a 2-alkenyloxazoline or 2-alkenyloxazine and reacting the resulting polymer which contains pendant oxazoline or oxazine moieties with a monobasic salt of sulfurous acid or a tertiary amine salt. Optionally, the 2-alkenyloxazoline or 2-alkenyloxazine can be polymerized with another ethylenically unsaturated monomer and/or a small amount of polyvinyl crosslinking monomer; and the resulting polymer is reacted with the desired salt to yield an anionic or cationic polymer.
Inventors
- 👤 Michael J. Fazio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:01
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/44
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
64 words
A process for preparing a polymer containing at least one pendant quaternary nitrogen atom wherein a 2-alkenyloxazoline or a 2-alkenyloxazine is subjected to vinyl polymerization and the resulting polymer comprising at least one pendant 2-oxazoline or 2-oxazine functionality is reacted with at least one tertiary amine salt under conditions such that said pendant 2oxazoline or 2-oxazine functionality is converted to a quaternary ammonium salt.
Claim 2
Dependent Claim
64 words
A process for preparing a polymer containing at least one pendant quaternary nitrogen atom wherein a 2-alkenyloxazoline or a 2-alkenyloxazine is subjected to vinyl polymerization and the resulting polymer comprising at least one pendant 2-oxazoline or 2-oxazine functionality is reacted with at least one tertiary amine salt under conditions such that said pendant 2oxazoline or 2-oxazine functionality is converted to a quaternary ammonium salt.
Claim 3
Dependent Claim
23 words
A process of claim 1 wherein said 2-alkenyloxazoline or 2-alkenyloxazine is subjected to vinyl polymerization with at least one other ethylenically unsaturated monomer.
Claim 4
Dependent Claim
15 words
A process of claim 2 wherein said other monomer is an ethylenically unsaturated water-soluble monomer.
Claim 5
Dependent Claim
21 words
A process of claim 2 wherein the other monomer is an ethylenically unsaturated, water-soluble monomer and/or an ethylenically unsaturated, water-insoluble monomer.
Claim 6
Dependent Claim
13 words
A process of claim 4 wherein a polyvinyl crosslinking monomer is polymerized therewith.
Claim 7
Dependent Claim
19 words
A process of claim 1 wherein said 2-alkenyloxazoline is selected from the group consisting of 2-isopropenyloxazoline, 2-vinyloxazoline and 5-methyl-2-isopropenyloxazoline.
Claim 8
Dependent Claim
48 words
A process of claim 1 wherein said tertiary amine salt is selected from the group consisting of the acid salt of tributylamine, the acid salt of triethylamine, the acid salt of triethanolamine, the acid salt of pyridine, the acid salt of dimethylaniline and the acid salt of trimethylamine.
Claim 9
Dependent Claim
42 words
A process of claim 1 wherein said polymer comprising a pendant 2-oxazoline or 2-oxazine functionality is reacted with an equivalent amount or a slight excess of said tertiary amine salt, based on the amount of oxazoline or oxazine units in the polymer.
Claim 10
Dependent Claim
40 words
A process of claim 1 wherein said polymer comprising a pendant 2-oxazoline or 2-oxazine functionality is reacted with less than an equivalent amount of said tertiary amine salt, based on the amount of oxazoline or oxazine units in the polymer.
Claim 11
Dependent Claim
26 words
A process of claim 1 wherein a homopolymer of 2-isopropenyloxazoline is reacted with trimethylamine hydrochloride in order to provide a homopolymer of methacryloylethyl trimethyl ammonium chloride.
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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) | 1987-12-04 | 1988-06-04 | 1988-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-04 | 1992-06-04 | 1992-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-04 | 1996-06-04 | 1996-12-04 | $7700.00 | Window Closed / Lapsed |