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US3915904A
Expired / Lapsed
US
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Water-soluble cationic polymeric materials and their use
Assignee: Veolia WTS USA Inc
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Filing: 1973-07-19
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Granted: 1975-10-28
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Expires: 1993-07-19
Abstract
Abstract The present disclosure is directed to novel water-soluble cationic polymers and their use either alone or in conjunction with coagulant aids to flocculate or coagulate matter suspended in aqueous systems. The novel polymer is prepared by reacting an alkylene polyamine with an epihalohydrin under specific conditions which include the incremental reaction of the epihalohydrin to fully react with the epihalohydrin and attain a polymer of uniform viscosity.
Inventors
- 👤 Richard G Tonkyn
- 👤 Norman V Vorchheimer
- 👤 Jr William J Fowler
- 👤 Richard A Heberle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:11
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; C02; C02F; C02F1/00; C02F1/52; C02F1/5236; C02F1/54
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
18 words
A water-soluble cationic polymer obtained by the polymerization of a epihalohydrin with an alkylene polyamine having the formula
Claim 2
Dependent Claim
18 words
A water-soluble cationic polymer obtained by the polymerization of a epihalohydrin with an alkylene polyamine having the formula
Claim 3
Dependent Claim
32 words
A polymer in accordance with claim 1 wherein the polymerization is carried out in an aqueous alkaline solution, and the reaction medium is acidified after the last increment of epihalohydrin is reacted.
Claim 4
Dependent Claim
26 words
A polymer in accordance with claim 2 wherein the epihalohydrin is epichlorohydrin, and the alkylene polyamine is from the group consisting of dimethylaminopropylamine, diethylaminopropylamine, N,N-dimethylaminoethylamine, N,N-diethylaminoethylamine.
Claim 5
Dependent Claim
32 words
A polymer in accordance with claim 3 wherein the polymerization is carried out in an aqueous alkaline solution, and the reaction medium is acidified after the last increment of epihalohydrin is reacted.
Claim 6
Dependent Claim
13 words
A polymer in accordance with claim 4 wherein the alkylene polyamine is dimethylaminopropylamine.
Claim 7
Dependent Claim
29 words
A polymer according to claim 1 wherein the ratio of the epichlorohydrin is from about 0.75:1 to about 1.3:1 and the polymerization temperature is from about 80* to 100*C.
Claim 8
Dependent Claim
50 words
A polymer in accordance with claim 6 wherein the polymerization is carried out in an aqueous alkaline solution having a pH of from about 8 to 11 and the reaction medium is acidified to a pH of from about 2 to 5 after the last increment of epihalohydrin is reacted.
Claim 9
Dependent Claim
26 words
A polymer in accordance with claim 7 wherein the epihalohydrin is epichlorohydrin and the alkylene polyamine is from the group consisting of dimethylaminopropylamine, diethylaminopropylamine, N,N-dimethylaminoethylamine, N,N-diethylaminoethylamine.
Claim 10
Dependent Claim
12 words
A polymer according to claim 8 wherein the polyalkylene amine is dimethylaminopropylamine.
Claim 11
Dependent Claim
13 words
A polymer according to claim 9 wherein the polymerization temperature is approximately 90*C.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |