Patent US4584339A successfully refreshed from Google Patents.
US4584339A
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Dilatant behavior of interpolymer complexes in aqueous solution
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1984-06-29
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Granted: 1986-04-22
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Expires: 2004-06-29
Abstract
Abstract The present invention relates to aqueous solutions having dilatant properties in which the aqueous solution contains a polymer complex which is a water soluble polymer backbone containing an anionic comonomer and a copolymer of a water soluble polymer backbone containing a cationic comonomer.
Inventors
- 👤 Robert D. Lundberg
- 👤 Dennis G. Peiffer
- 👤 Ilan Duvdevani
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:34
CPC Classifications
C; C10; C10M; C10M173/00; C10M173/02; C08; C08L; C08L57/00; C08L57/04; C09; C09K; C09K3/00; C09K3/18; C09K8/00; C09K8/58; C09K8/588; C10M2217/00; C10M2217/02; C10M2221/00; C10M2221/02; C10N; C10N2040/00; C10N2040/08; C10N2050/00; C10N2050/01; Y; Y10; Y10S; Y10S260/00; Y10S260/31; Y10T; Y10T137/00; Y10T137/0318; Y10T137/0391
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
163 words
A method for increasing the viscosity of water and maintaining said viscosity of said water, when said water is subject to increasing shear rate which comprises the step of adding a polymer complex to said water in sufficient quantity to increase the viscosity of said water, said polymer complex comprising: (a) a copolymer of a first water soluble polymer backbone and an anionic comonomer, said anionic comonomer is selected from the group consisting of styrene sulfonate, vinyl sulfonate, allyl sulfonate, acrylate and acrylamidopropyl sulfonate/2-acrylamido-2-methylpropane sulfonic acid, sodium styrene sulfonate, (meth)acrylic acid, 2-sulfoethylmethacrylate; and (b) a copolymer of a second water soluble polymer backbone and a cationic comonomer, said cationic comonomer is selected from the group consisting of N,N,N-trimethylammoniumpropylmethacrylamide, vinyl pyridine/methacrylamidopropyltrimethylammonium chloride, dimethyldiallylammonium chloride, diethyldiallylammonium chloride, 2-methacryloxy-2-ethyltrimethylammonium chloride, trimethylmethacryloxyethylammonium methsulfate, 2-acrylamido-2-methylpropyltrimethylammonium chloride, vinylbenzyltrimethylammonium chloride, wherein the molar ratio of the cationic comonomer in the second copolymer to the anionic comonomer in the first copolymer is about 45/1 to about 1.1/1 or 1/1.1 to 1/45.
Claim 2
Independent Claim
163 words
A method for increasing the viscosity of water and maintaining said viscosity of said water, when said water is subject to increasing shear rate which comprises the step of adding a polymer complex to said water in sufficient quantity to increase the viscosity of said water, said polymer complex comprising: (a) a copolymer of a first water soluble polymer backbone and an anionic comonomer, said anionic comonomer is selected from the group consisting of styrene sulfonate, vinyl sulfonate, allyl sulfonate, acrylate and acrylamidopropyl sulfonate/2-acrylamido-2-methylpropane sulfonic acid, sodium styrene sulfonate, (meth)acrylic acid, 2-sulfoethylmethacrylate; and (b) a copolymer of a second water soluble polymer backbone and a cationic comonomer, said cationic comonomer is selected from the group consisting of N,N,N-trimethylammoniumpropylmethacrylamide, vinyl pyridine/methacrylamidopropyltrimethylammonium chloride, dimethyldiallylammonium chloride, diethyldiallylammonium chloride, 2-methacryloxy-2-ethyltrimethylammonium chloride, trimethylmethacryloxyethylammonium methsulfate, 2-acrylamido-2-methylpropyltrimethylammonium chloride, vinylbenzyltrimethylammonium chloride, wherein the molar ratio of the cationic comonomer in the second copolymer to the anionic comonomer in the first copolymer is about 45/1 to about 1.1/1 or 1/1.1 to 1/45.
Claim 3
Dependent Claim
37 words
A method according to claim 1 wherein said first and said second water soluble polymer backbones are selected from the group consisting of acrylamide, vinyl pyrrolidone, ethylene oxide, vinyl alcohol methacrylamide, alkyl substituted acrylamides, n-vinyllactones, methacrylates, N,N-dimethylacrylamide.
Claim 4
Dependent Claim
32 words
A method according to claim 1 or 2, wherein the concentration of the polymer complex in the aqueous solution is about 0.01 to about 10 grams per 100 ml of said solution.
Claim 5
Dependent Claim
23 words
A method according to claim 1 or 2, wherein the anionic copolymer contains about 0.1 to about 50 mole % anionic monomer units.
Claim 6
Dependent Claim
23 words
A method according to claim 1 or 2, wherein the cationic copolymer contains about 0.1 to about 50 mole % cationic monomer units.
Claim 7
Dependent Claim
14 words
A method according to claim 1 wherein said water soluble polymer backbone is polyacrylamide.
References Cited (Backward Citations)
US3562226A
Cited
US3663477A
Cited
US3679000A
Cited
US3768565A
Cited
US3867330A
Cited
US4104226A
Cited
US4406799A
Cited
US4489180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1989-04-21 | 1989-10-21 | 1990-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-21 | 1993-10-21 | 1994-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-21 | 1997-10-21 | 1998-04-22 | $7700.00 | Window Closed / Lapsed |