US4499214A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of rapidly dissolving polymers in water
Assignee: DIACHEM INDUSTRIES Inc 1245 PARAMOUNT DRIVE BATAVIA IL 60510 A CORP OF
•
Filing: 1983-05-03
•
Granted: 1985-02-12
•
Expires: 2003-05-03
Abstract
Abstract Water-soluble polymers are rapidly dissolved in water by dispersing finely divided particles of the polymer into a liquid carrier in which the polymer is insoluble to form a suspension. The suspension is then added to water in order to release the polymer into the water as discrete particles that rapidly dissolve. The polymer particles are preferably prepared by cryogenic grinding, or another non-molecularly destructive process.
Inventors
- 👤 Edwin T. Sortwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:23
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/02; C08J3/03; C08J2300/00; C08J2300/10; Y; Y10; Y10S; Y10S507/00; Y10S507/935; Y10S507/936
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
80 words
A method of rapidly dissolving a water-soluble polymer or gum in water which comprises the steps of: (a) preparing finely-divided particles of said polymer or gum by comminuting said polymer or gum under substantially non-molecularly destructive conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer or gum is substantially insoluble to form a suspension; and, (c) adding said suspension to water with sufficient mixing to disperse and rapidly dissolve said particles in said water.
Claim 2
Independent Claim
80 words
A method of rapidly dissolving a water-soluble polymer or gum in water which comprises the steps of: (a) preparing finely-divided particles of said polymer or gum by comminuting said polymer or gum under substantially non-molecularly destructive conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer or gum is substantially insoluble to form a suspension; and, (c) adding said suspension to water with sufficient mixing to disperse and rapidly dissolve said particles in said water.
Claim 3
Dependent Claim
50 words
The method of claim 1 wherein the liquid carrier is a hydrocarbon oil and a hydrophilic emulsifier is present in the suspension or in the water in which the polymer or gum is to be dissolved, so as to form an oil-in-water emulsion in step 1(c) to promote rapid dissolution.
Claim 4
Dependent Claim
32 words
The method of claim 1 wherein said particles are insoluble in the liquid carrier, and said liquid carrier is soluble or easily dispersible in the water to which the suspension is added.
Claim 5
Dependent Claim
22 words
The method of claim 1 wherein said polymer or gum comprises between about 10% and about 70% by weight of said suspension.
Claim 6
Dependent Claim
17 words
The method of claim 1 wherein a suspending or dispersing agent is present in said liquid carrier.
Claim 7
Dependent Claim
20 words
The method of claim 1 wherein said polymer or gum comprises a blend of one or more polymer(s) and gum(s).
Claim 8
Dependent Claim
17 words
The method of claim 1 wherein the size of said particles is less than about 70 microns.
Claim 9
Dependent Claim
17 words
The method of claim 1 wherein said comminution step is carried out by means of cryogenic grinding.
Claim 10
Independent Claim
76 words
A method of rapidly dissolving a water-soluble polymer or gum in water which comprises the steps of: (a) preparing finely-divided particles of said polymer or gum by comminuting said polymer or gum under substantially non-molecularly destructive conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer or gum is substantially insoluble to form a suspension, said liquid carrier being soluble in water; and, (c) adding said suspension to water with mixing.
Claim 11
Independent Claim
76 words
A method of rapidly dissolving a water-soluble polymer or gum in water which comprises the steps of: (a) preparing finely-divided particles of said polymer or gum by comminuting said polymer or gum under substantially non-molecularly destructive conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer or gum is substantially insoluble to form a suspension, said liquid carrier being soluble in water; and, (c) adding said suspension to water with mixing.
Claim 12
Dependent Claim
22 words
The method of claim 9 wherein said polymer or gum comprises between about 10% and about 70% by weight of said suspension.
Claim 13
Dependent Claim
20 words
The method of claim 9 wherein said polymer or gum comprises a blend of one or more polymer(s) and gum(s).
Claim 14
Dependent Claim
17 words
The method of claim 9 wherein the size of said particles is less than about 70 microns.
Claim 15
Dependent Claim
17 words
The method of claim 9 wherein said commiunution step is carried out by means of cryogenic grinding.
Claim 16
Independent Claim
72 words
A method of rapidly dissolving a polyacrylamide polymer in water which comprises the steps of: (a) preparing finely-divided particles of said polyacrylamide polymer by comminuting said polymer under cryogenic grinding conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer is substantially insoluble to form a suspension; and, (c) adding said suspension to water with sufficient mixing to disperse and rapidly dissolve said particles in said water.
Claim 17
Independent Claim
72 words
A method of rapidly dissolving a polyacrylamide polymer in water which comprises the steps of: (a) preparing finely-divided particles of said polyacrylamide polymer by comminuting said polymer under cryogenic grinding conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer is substantially insoluble to form a suspension; and, (c) adding said suspension to water with sufficient mixing to disperse and rapidly dissolve said particles in said water.
Claim 18
Dependent Claim
48 words
The method of claim 14 wherein the liquid carrier is a hydrocarbon oil and a hydrophilic emulsifier is present in the suspension or in the water in which said polymer is to be dissolved, so as to form an oil-in-water emulsion in step 1(c) to promote rapid dissolution.
Claim 19
Dependent Claim
32 words
The method of claim 14 wherein said particles are insoluble in the liquid carrier, and said liquid carrier is soluble or easily dispersible in the water to which the suspension is added.
Claim 20
Dependent Claim
20 words
The method of claim 14 wherein said polymer comprises between about 10% and about 70% by weight of said suspension.
Claim 21
Dependent Claim
17 words
The method of claim 14 wherein a suspending or dispersing agent is present in said liquid carrier.
Claim 22
Dependent Claim
17 words
The method of claim 14 wherein the size of said particles is less than about 70 microns.
Claim 23
Independent Claim
68 words
A method of rapidly dissolving a polyacrylamide polymer in water which comprises the steps of: (a) preparing finely-divided particles of said polyacrylamide polymer by comminuting said polymer under cryogenic grinding conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer is substantially insoluble to form a suspension, said liquid carrier being soluble in water; and, (c) adding said suspension to water with mixing.
Claim 24
Independent Claim
68 words
A method of rapidly dissolving a polyacrylamide polymer in water which comprises the steps of: (a) preparing finely-divided particles of said polyacrylamide polymer by comminuting said polymer under cryogenic grinding conditions; (b) dispersing said particles in a substantially water-free liquid carrier in which said polymer is substantially insoluble to form a suspension, said liquid carrier being soluble in water; and, (c) adding said suspension to water with mixing.
Claim 25
Dependent Claim
19 words
The method of claim 20 wherein said polymer comprises between about 10% and 70% by weight of said suspension.
Claim 26
Dependent Claim
17 words
The method of claim 20 wherein the size of said particles is less than about 70 microns.
References Cited (Backward Citations)
US28474A
Cited
US28576A
Cited
US2376656A
Cited
US3122203A
Cited
USRE28576E
Cited
USRE28474E
Cited
USRE28576F1
Cited
USRE28474F1
Cited
US3852234A
Cited
US4040967A
Cited
US4048377A
Cited
US4218262A
Cited
US4312675A
Cited
US4299755A
Cited
US4336145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |