US5006596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-inverting, water-in-oil emulsions
Assignee: Veolia WTS USA Inc
•
Filing: 1990-02-09
•
Granted: 1991-04-09
•
Expires: 2010-02-09
Abstract
Abstract The present disclosure is directed to water-in-oil emulsion polymers which are used to flocculate matter suspended in aqueous systems. The disclosure and invention are particularly relevent to emulsion polymers which are self-inverting.
Inventors
- 👤 Fu Chen
- 👤 Edward J. Connors
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 16:53
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/52; C02F1/54; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
Composition of a self-inverting, water-in-oil emulsion comprising a water-soluble copolymer which contains acrylamide, a cationic monomer and a third monomer having the structure: ##STR2## wherein R 1 is hydrogen or methyl; R 2 is hydrogen, methyl or ethyl; R 3 is hydrogen or C 1 -C 4 alkyl; and n is from 1 to 100.
Claim 2
Dependent Claim
55 words
Composition of a self-inverting, water-in-oil emulsion comprising a water-soluble copolymer which contains acrylamide, a cationic monomer and a third monomer having the structure: ##STR2## wherein R 1 is hydrogen or methyl; R 2 is hydrogen, methyl or ethyl; R 3 is hydrogen or C 1 -C 4 alkyl; and n is from 1 to 100.
Claim 3
Dependent Claim
20 words
Composition according to claim 1 wherein said third monomer is about 0.01 to about 10 mole percent of said copolymer.
Claim 4
Dependent Claim
14 words
Composition according to claim 1 wherein said emulsion is free of an inverting surfactant.
Claim 5
Dependent Claim
19 words
Composition according to claim 1, wherein said water-soluble copolymer has a molecular weight from about 10,000 to about 30,000,000.
Claim 6
Dependent Claim
16 words
Composition according to claim 1, wherein said water-soluble copolymer has a molecular weight above about 1,000,000.
Claim 7
Dependent Claim
24 words
Composition according to claim 1, in which R 1 and R 2 are methyl; R 3 is hydrogen; and n is 5 to 6.
Claim 8
Dependent Claim
42 words
Composition according to claim 1, wherein the cationic monomer has the structure ##STR3## wherein R 4 is hydrogen or methyl; R 5 and R 6 are independently C 1 to C 4 lower alkyl groups; water-soluble salts or quaternary ammonium salts thereof.
Claim 9
Dependent Claim
12 words
Composition according to claim 7, wherein the cationic monomer is diallyldimethylammonium chloride.
Claim 10
Dependent Claim
23 words
Composition according to claim 7, wherein R 4 is hydrogen or methyl, and R 5 and R 6 are either methyl or ethyl.
Claim 11
Dependent Claim
17 words
Composition according to claim 7, wherein said cationic monomer is quaternized with methyl chloride or dimethyl sulfate.
Claim 12
Dependent Claim
13 words
Composition according to claim 1, wherein said cationic monomer is acryloyloxyethyltrimethyl ammonium chloride.
Claim 13
Dependent Claim
12 words
Composition according to claim 7, wherein said cationic monomer is methacryloyloxyethyltrimethylammonium chloride.
Claim 14
Dependent Claim
11 words
Composition according to claim 7, wherein said cationic is methacryloyloxyethyltrimethylammonium methosulfate.
Claim 15
Dependent Claim
12 words
Composition according to claim 7, wherein said cationic monomer is acryloyloxyethyldiethylmethylammonium methosulfate.
References Cited (Backward Citations)
US28474A
Cited
US28576A
Cited
US3284393A
Cited
USRE28576F1
Cited
US3624019A
Cited
USRE28474E
Cited
USRE28576E
Cited
US3734873A
Cited
USRE28474F1
Cited
US3896161A
Cited
US3997492A
Cited
US4075411A
Cited
US4022731A
Cited
US4024097A
Cited
US4268641A
Cited
US4339371A
Cited
US4390401A
Cited
US4463151A
Cited
EP0126528A2
Cited
US4672090A
Cited
US4702844A
Cited
US4618648A
Cited
US4792593A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-04-08 | 1994-10-08 | 1995-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-08 | 1998-10-08 | 1999-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-08 | 2002-10-08 | 2003-04-09 | $7700.00 | Window Closed / Lapsed |