Patent US3915920A successfully refreshed from Google Patents.
US3915920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized water-in-oil emulsions utilizing minor amounts of oil-soluble polymers
Assignee: ChampionX LLC
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Filing: 1974-03-15
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Granted: 1975-10-28
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Expires: 1994-03-15
Abstract
Abstract An additive and method of stabilizing and decreasing sediment in a water-in-oil emulsion where the aqueous discontinuous phase contains a water-soluble vinyl addition polymer, comprising an oil-soluble polymer added to the continuous phase in the amount of about 0.1-1% by weight based on the total polymer emulsion. Preferred water-in-oil emulsions include those containing polyacrylamide, polyacrylic acid predominantly in salt form, and copolymers thereof; and preferred oil-soluble polymers include polyisobutylene, polybutadiene, Betaprene H, poly(t)butylstyrene, and natural rubber. The additive and method are useful for redispersing such emulsions.
Inventors
- 👤 Manuel Slovinsky
- 👤 Roger C Ryan
- 👤 Kenneth G Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:59
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/09; C08J2300/00; C08J2300/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
100 words
IN A METHOD OF STABILIZING AND DECREASING SEDIMENT FORMATION IN A WATER-IN-OIL EMULSION WHEREIN THE WATER PHASE CONTAINS A WATER-SOLUBLE VINYL ADDITION POLYMER IN A CONTINUOUS OIL PHASE, THE STEP CONSISTING OF ADDING AN OIL-SOLUBLE POLYMER TO THE CONTINUOUS PHASE IN A AMOUNT OF ABOUT 0.1-1% BASED ON THE TOTAL WEIGHT OF THE EMULSION WHEREIN THE OIL-SOLUBLE POLYMER SELECTED FROM AT SEAST ONE MEMBER OF THE GROUP CONSISTING OF POLYISOBUTYLENE, POLYBUTADIENE, POLY(TERTIARY) BUTYSTYRENE AND NATURAL RUBBER, AND WHEREIN SAID OIL-SOLUBLE POLYMER HAS A MOLECULAR WEIGHT IN HE RANGE OF ABOUT 300,000 TO 5 MILLION DISPERSED IN A SUITABLE ORGANIC SOLVENT.
Claim 2
Dependent Claim
100 words
IN A METHOD OF STABILIZING AND DECREASING SEDIMENT FORMATION IN A WATER-IN-OIL EMULSION WHEREIN THE WATER PHASE CONTAINS A WATER-SOLUBLE VINYL ADDITION POLYMER IN A CONTINUOUS OIL PHASE, THE STEP CONSISTING OF ADDING AN OIL-SOLUBLE POLYMER TO THE CONTINUOUS PHASE IN A AMOUNT OF ABOUT 0.1-1% BASED ON THE TOTAL WEIGHT OF THE EMULSION WHEREIN THE OIL-SOLUBLE POLYMER SELECTED FROM AT SEAST ONE MEMBER OF THE GROUP CONSISTING OF POLYISOBUTYLENE, POLYBUTADIENE, POLY(TERTIARY) BUTYSTYRENE AND NATURAL RUBBER, AND WHEREIN SAID OIL-SOLUBLE POLYMER HAS A MOLECULAR WEIGHT IN HE RANGE OF ABOUT 300,000 TO 5 MILLION DISPERSED IN A SUITABLE ORGANIC SOLVENT.
Claim 3
Dependent Claim
89 words
A water-in-oil emulsion of a water-soluble vinyl addition polymer which also contains as an additive about 0.1-1% by weight of an oil-soluble polymer added to the continuous phase wherein the weight percent of said oil-soluble polymer is based on the total emulsion and wherein the oil-soluble polymer selected from at least one member of the group consisting of polyisobutylene, polybutadiene, poly(tertiary) butylstyrene and natural rubber, and wherein said oil-soluble polymer has a molecular weight in the range of about 300,000 to 6 million dispersed in a suitable organic solvent.
Claim 4
Dependent Claim
89 words
A water-in-oil emulsion of a water-soluble vinyl addition polymer which also contains as an additive about 0.1-1% by weight of an oil-soluble polymer added to the continuous phase wherein the weight percent of said oil-soluble polymer is based on the total emulsion and wherein the oil-soluble polymer selected from at least one member of the group consisting of polyisobutylene, polybutadiene, poly(tertiary) butylstyrene and natural rubber, and wherein said oil-soluble polymer has a molecular weight in the range of about 300,000 to 6 million dispersed in a suitable organic solvent.
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 |