Patent US4443576A successfully refreshed from Google Patents.
US4443576A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Terpolymer composition
Assignee: ChampionX LLC
•
Filing: 1982-03-29
•
Granted: 1984-04-17
•
Expires: 2002-03-29
Abstract
Abstract Novel polymeric compositions useful as thickeners and rheology modifiers for oil-in-water emulsion systems are disclosed. The water-soluble or swellable compositions described contain, prior to polymerization, from: ______________________________________ 10-70% Acrylamide or methacrylamide; 20-70% Acrylic acid, methacrylic acid, or their water-soluble salts; 5-50% Of a hydroxyalkylacrylate; 0-10% Of a polyfunctional monomeric branching material; and, 0-15% Low molecular weight water-soluble copolymer of a non-ionic or anionic water-soluble vinyl addition monomer and lower alkylacrylate. ______________________________________ Optionally a water-soluble polymer dispersant may be added to the composition after polymerization.
Inventors
- 👤 Bhupati R. Bhattacharyya
- 👤 Manuel Slovinsky
- 👤 Raymond J. Wachala
- 👤 Lawrence E. Beske
- 👤 Michael L. McCullar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:23
CPC Classifications
C; C08; C08F; C08F220/00; C08F220/02; C08F220/52; C08F220/54; C08F220/56; C08F220/04; C08F220/06; C08F265/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
153 words
A water soluble or swellable composition comprising the product formed by polymerizing together under free radical forming conditions: (a) 10-70 weight percent of a water soluble monomer selected from the group consisting of acrylamide and methacrylamide; (b) 15-70 weight percent of a monomer selected from the group consisting of acrylic acid, methacrylic acid and water-soluble salts of acrylic acid and methacrylic acid; (c) 5-50 weight percent of a lower hydroxy alkyl acrylate; (d) 0.5-10% of a water soluble polyfunctional monomeric branching agent having at least two CH 2 ═C groups; and (e) 0.1-15% of a water soluble copolymer having a molecular weight of from 2,000 to 50,000 of: (1) a water-soluble monomer selected from the group consisting of acrylamide, acrylic acid, methacrylamide, methacrylic acid and water-soluble salts of acrylic and methacrylic acids; with, (2) a C 1 -C 8 alkyl acrylate, the ratio of water-soluble monomer to alkyl acrylate being 50:50 to 95:5.
Claim 2
Dependent Claim
153 words
A water soluble or swellable composition comprising the product formed by polymerizing together under free radical forming conditions: (a) 10-70 weight percent of a water soluble monomer selected from the group consisting of acrylamide and methacrylamide; (b) 15-70 weight percent of a monomer selected from the group consisting of acrylic acid, methacrylic acid and water-soluble salts of acrylic acid and methacrylic acid; (c) 5-50 weight percent of a lower hydroxy alkyl acrylate; (d) 0.5-10% of a water soluble polyfunctional monomeric branching agent having at least two CH 2 ═C groups; and (e) 0.1-15% of a water soluble copolymer having a molecular weight of from 2,000 to 50,000 of: (1) a water-soluble monomer selected from the group consisting of acrylamide, acrylic acid, methacrylamide, methacrylic acid and water-soluble salts of acrylic and methacrylic acids; with, (2) a C 1 -C 8 alkyl acrylate, the ratio of water-soluble monomer to alkyl acrylate being 50:50 to 95:5.
Claim 3
Dependent Claim
150 words
The composition of claim 1 comprising the product formed by polymerizing under free radical forming conditions: (a) 20-65 weight percent of a water soluble monomer selected from the group consisting of acrylamide and methacrylamide; (b) 20-50 weight percent of a monomer selected from the group consisting of acrylic acid, methacrylic acid and water-soluble salts of acrylic acid and methacrylic acid; (c) 10-35 weight percent a lower hydroxy alkyl acrylate; (d) 0.05-5.0% of a water soluble polyfunctional monomeric branching agent having at least two CH 2 ═C groups; and (e) 0.1-10% of a water soluble copolymer having a molecular weight of from 2,000 to 50,000 of: (1) a water-soluble monomer selected from the group consisting of acrylamide, acrylic acid, methacrylamide, methacrylic acid and water-soluble salts of acrylic and methacrylic acids; with, (2) a C 1 -C 8 alkyl acrylate, the ratio of water-soluble monomer to alkyl acrylate being 50:50 to 95:5.
Claim 4
Dependent Claim
149 words
The composition of claim 1 comprising the product formed by polymerizing under free radical forming conditions: (a) 35-55 weight percent of a water soluble monomer selected from the group consisting of acrylamide and methacrylamide; (b) 25-40 weight percent of a monomer selected from the group consisting of acrylic acid, methacrylic acid and water-soluble salts of acrylic acid and methacrylic acid; (c) 10-30 weight a lower hydroxy alkyl acrylate; (d) 0.1-4% of a water soluble polyfunctional monomeric branching agent having at least two CH 2 ═C< groups; and (e) 0.25-5% of a water soluble copolymer having a molecular weight of from 2,000 to 50,000 of: (1) a water-soluble monomer selected from the group consisting of acrylamide, acrylic acid, methacrylamide, methacrylic acid and water-soluble salts of acrylic and methacrylic acids; with, (2) a C 1 -C 8 alkyl acrylate, the ratio of water-soluble monomer to alkyl acrylate being 50:50 to 95:5.
Claim 5
Dependent Claim
9 words
A water-in-oil emulsion of the composition of claim 1.
Claim 6
Dependent Claim
9 words
A water-in-oil emulsion of the composition of claim 2.
Claim 7
Dependent Claim
9 words
A water-in-oil emulsion of the composition of claim 3.
Claim 8
Dependent Claim
30 words
The composition of claim 1 having added thereto subsequent to polymerization from 0.25 to 15% of a water-soluble vinyl addition polymer having a molecular weight of from 2,000 to 50,000.
Claim 9
Dependent Claim
30 words
The composition of claim 2 having added thereto subsequent to polymerization from 0.5 and 30% of a water-soluble vinyl addition polymer having a molecular weight of from 2,500 to 25,000.
Claim 10
Dependent Claim
30 words
The composition of claim 3 having added thereto subsequent to polymerization from 10 to 25% of a water-soluble vinyl addition polymer having a molecular weight of from 5,000 to 15,000.
Claim 11
Dependent Claim
37 words
A method for improving the rheological properties of oil-in-water emulsion systems, mixed emulsion dispersion systems having an aqueous continuous phase, and aqueous systems which comprise adding thereto from 0.1 to 20% of the composition of claim 1.
Claim 12
Dependent Claim
25 words
A method for improving the rheological properties of oil-in-water emulsion systems which comprise adding thereto from 0.25 to 10% of the composition of claim 2.
Claim 13
Dependent Claim
25 words
A method for improving the rheological properties of oil-in-water emulsion systems which comprise adding thereto from 0.5 to 2% of the composition of claim 3.
Claim 14
Dependent Claim
43 words
A method for improving the rheological properties of oil-in-water emulsion systems, mixed emulsion dispersion systems having an aqueous continuous phase, and aqueous systems which comprises adding to the oil-in-water emulsion system from 0.1 to 20% by weight of the composition of claim 7.
Claim 15
Dependent Claim
43 words
A method for improving the rheological properties of oil-in-water emulsion systems, mixed emulsion dispersion systems having an aqueous continuous phase, and aqueous systems which comprises adding to the oil-in-water emulsion system from 0.25 to 10% by weight of the composition of claim 8.
Claim 16
Dependent Claim
43 words
A method for improving the rheological properties of oil-in-water emulsion systems, mixed emulsion dispersion systems having an aqueous continuous phase, and aqueous systems which comprises adding to the oil-in-water emulsion system from 0.5 to 2.0% by weight of the composition of claim 9.
References Cited (Backward Citations)
US28474A
Cited
US28576A
Cited
US2798053A
Cited
US3284393A
Cited
US3488215A
Cited
USRE28576E
Cited
USRE28576F1
Cited
USRE28474E
Cited
US3624019A
Cited
USRE28474F1
Cited
US3734873A
Cited
US3767629A
Cited
US3826771A
Cited
US3970633A
Cited
US3915920A
Cited
US3997492A
Cited
US3996180A
Cited
US4024097A
Cited
US4143222A
Cited
US4196272A
Cited
US4330450A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-17 | 1987-10-17 | 1988-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-17 | 1991-10-17 | 1992-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-17 | 1995-10-17 | 1996-04-17 | $7700.00 | Window Closed / Lapsed |