US4252706A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for precisely controlling the dissolution rate of high molecular weight water-soluble vinyl polymers
Assignee: ChampionX LLC
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Filing: 1979-10-31
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Granted: 1981-02-24
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Expires: 1999-10-31
Abstract
Abstract The dissolution rate of water-soluble polymers in water can be precisely controlled. This is accomplished by inverting a water-in-oil emulsion containing the water-soluble vinyl polymer into water which contains at the time of inversion an exact amount of an emulsifier system having an HLB number which has been predetermined to produce a specific solubility rate for the water-soluble vinyl polymer.
Inventors
- 👤 Kenneth G. Phillips
- 👤 Alvin J. Frisque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:21
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2300/00; C08J2300/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A method of precisely controlling the dissolution rate of a water-soluble vinyl polymer into water which comprises inverting a water-in-oil emulsion containing the water-soluble vinyl polymer into water which contains at the time of inversion an exact amount of an emulsifier system having an HLB number which has been predetermined to produce a specific solubility rate for the water-soluble vinyl polymer, said predetermination having been made by inverting the water-in-oil emulsion of the water-soluble polymer in water over a range of HLB numbers to determine the rate of dissolution of the water-soluble vinyl polymer for this range of HLB numbers and then dissolving the polymer at such predetermined specific rate.
Claim 2
Independent Claim
110 words
A method of precisely controlling the dissolution rate of a water-soluble vinyl polymer into water which comprises inverting a water-in-oil emulsion containing the water-soluble vinyl polymer into water which contains at the time of inversion an exact amount of an emulsifier system having an HLB number which has been predetermined to produce a specific solubility rate for the water-soluble vinyl polymer, said predetermination having been made by inverting the water-in-oil emulsion of the water-soluble polymer in water over a range of HLB numbers to determine the rate of dissolution of the water-soluble vinyl polymer for this range of HLB numbers and then dissolving the polymer at such predetermined specific rate.
Claim 3
Dependent Claim
22 words
The method of claim 1 where the water-soluble vinyl polymer is from the group consisting of acrylamide polymers and acrylic acid polymers.
Claim 4
Dependent Claim
14 words
The method of claim 1 where the emulsifier system contains a nonionic water-soluble surfactant.
Claim 5
Dependent Claim
35 words
The method of claim 1 where the emulsifier system contains both an oil-soluble emulsifier and a nonionic water-soluble surfactant with the oil-soluble emulsifier being originally contained in the water-in-oil emulsion of the water-soluble vinyl polymer.
Claim 6
Dependent Claim
22 words
The method of claim 4 where the water-soluble vinyl polymer is from the group consisting of acrylamide polymers and acrylic acid polymers.
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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) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |