US4052353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dispersions of water soluble polymers in oil
Assignee: Individual
•
Filing: 1975-09-15
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Granted: 1977-10-04
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Expires: 1995-09-15
Abstract
Abstract Water soluble polymers dispersed in a water-in-oil emulsion are treated to reduce the water content thereof to provide a polymer dispersed in oil which is stable to coagulation or agglomeration during subsequent treatment. The composition can be chemically modified and/or made self dissolving in water by addition of surfactant without polymer agglomeration.
Inventors
- 👤 Clyde S. Scanley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 02:02
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08F; C08F8/00; C08G; C08G73/00; C08G73/02; C08G73/0206; C08G73/0213; C08G73/022; C08J2300/00; C08J2300/14; Y; Y10; Y10S; Y10S524/00; Y10S524/922
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
115 words
A self water dissolving composition of a water soluble polymer dispersed in oil which is stable to polymer coagulation and agglomeration, comprising: a water soluble polymer dispersed in oil, said polymer having a water content at which the polymer remains finely divided and dispersed in the oil, said water content being less than 40%, by weight, based on polymer and water, said water soluble polymer dispersed in oil having been prepared from a water in oil emulsion of said water soluble polymer by reduction of the water content thereof; and a water soluble surfactant, having an HLB number of above 8 in an amount effective to render the water soluble polymer self dissolving in water.
Claim 2
Dependent Claim
115 words
A self water dissolving composition of a water soluble polymer dispersed in oil which is stable to polymer coagulation and agglomeration, comprising: a water soluble polymer dispersed in oil, said polymer having a water content at which the polymer remains finely divided and dispersed in the oil, said water content being less than 40%, by weight, based on polymer and water, said water soluble polymer dispersed in oil having been prepared from a water in oil emulsion of said water soluble polymer by reduction of the water content thereof; and a water soluble surfactant, having an HLB number of above 8 in an amount effective to render the water soluble polymer self dissolving in water.
Claim 3
Dependent Claim
23 words
The composition of claim 1 wherein said water content is from 1% to 30%, by weight, of water based on polymer and water.
Claim 4
Dependent Claim
23 words
The composition of claim 2 wherein the water content is from 1% to 15%, by weight, of water, based on polymer and water.
Claim 5
Dependent Claim
14 words
The composition of claim 3 wherein the polymer is an ethylenically unsaturated addition polymer.
Claim 6
Dependent Claim
25 words
The composition of claim 4 wherein the surfactant is present in an amount of from about 0.1% to about 20%, by weight, based on oil.
Claim 7
Dependent Claim
34 words
The composition of claim 5 wherein the polymer dispersed in oil is prepared from a water in oil emulsion containing from about 50% to about 95%, by weight, water, based on polymer and water.
Claim 8
Dependent Claim
16 words
The composition of claim 6 wherein the polymer has a molecular weight of at least 100,000.
Claim 9
Dependent Claim
12 words
The composition of claim 7 wherein the polymer is an acrylamide polymer.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |