US4420586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-aqueous dispersion polymerization of vinyl monomers
Assignee: ChampionX LLC
•
Filing: 1982-11-29
•
Granted: 1983-12-13
•
Expires: 2002-11-29
Abstract
Abstract Non-aqueous dispersion polymers are formed using certain polymer oil-soluble oxygen containing solvents having at least two labile hydrogen atoms and at least one tertiary carbon atom. Non-aqueous dispersion polymers prepared in this manner do not require the use of block or graft copolymer stabilizers.
Inventors
- 👤 Bhupati R. Bhattacharyya
- 👤 Edward G. Ballweber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:17
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/58; C09K8/588; C08; C08F; C08F2/00; C08F2/12; C08F2/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
72 words
In a non-aqueous dispersion polymerization process wherein a water-soluble vinyl addition monomer along with a water insoluble vinyl addition monomer is polymerized in the presence of an organic solvent under free radical forming conditions, the improvement comprising using as the organic solvent a material having at least two labile hydrogen atoms, a free hydroxy group and at least one tertiary carbon atom, said solvent further characterized as having from 8-15 carbon atoms.
Claim 2
Dependent Claim
72 words
In a non-aqueous dispersion polymerization process wherein a water-soluble vinyl addition monomer along with a water insoluble vinyl addition monomer is polymerized in the presence of an organic solvent under free radical forming conditions, the improvement comprising using as the organic solvent a material having at least two labile hydrogen atoms, a free hydroxy group and at least one tertiary carbon atom, said solvent further characterized as having from 8-15 carbon atoms.
Claim 3
Dependent Claim
14 words
The improvement of claim 1 wherein the organic liquid is 2,2 dimethyl-3-hydroxy,4-methyl amyl isobutarate.
Claim 4
Dependent Claim
93 words
An improved non-aqueous dispersion polymerization process in which at least one monomer from each of the following groups consisting of: (a) acrylamide, methacrylamide, and derivatives of acrylamide; (b) acrylic acid, methacrylic acid, ethacrylic acid (c) methyl acrylates, ethyl acrylates and, C 5 -C 18 alkyl methacrylates are polymerized under free radical forming conditions in an organic solvent, the improvement comprising using as the organic solvent a solvent containing two labile hydrogen atoms, a free hydroxyl group and at least one tertiary carbon atom, said solvent further characterized as having from 8-15 carbon atoms.
Claim 5
Dependent Claim
93 words
An improved non-aqueous dispersion polymerization process in which at least one monomer from each of the following groups consisting of: (a) acrylamide, methacrylamide, and derivatives of acrylamide; (b) acrylic acid, methacrylic acid, ethacrylic acid (c) methyl acrylates, ethyl acrylates and, C 5 -C 18 alkyl methacrylates are polymerized under free radical forming conditions in an organic solvent, the improvement comprising using as the organic solvent a solvent containing two labile hydrogen atoms, a free hydroxyl group and at least one tertiary carbon atom, said solvent further characterized as having from 8-15 carbon atoms.
Claim 6
Dependent Claim
14 words
The improvement of claim 3 wherein the organic solvent is 2,2 dimethyl-3-hydroxy,4-methyl amyl isobutarate.
Claim 7
Dependent Claim
9 words
Non-aqueous vinyl dispersion polymers prepared according to claim 1.
Claim 8
Dependent Claim
9 words
Non-aqueous vinyl dispersion polymers prepared according to claim 2.
Claim 9
Dependent Claim
9 words
Non-aqueous vinyl dispersion polymers prepared according to claim 3.
Claim 10
Dependent Claim
15 words
A water-based latex paint containing a non-aqueous vinyl dispersion polymer prepared according to claim 1.
Claim 11
Dependent Claim
16 words
An oil-in-water emulsion having added thereto a non-aqueous vinyl dispersion polymer prepared according to claim 1.
Claim 12
Dependent Claim
16 words
A tertiary recovery agent for petroleum comprising a non-aqueous dispersion polymer prepared according to claim 1.
Claim 13
Dependent Claim
16 words
An aqueous dispersion having added thereto a non-aqueous vinyl addition polymer prepared according to claim 1.
Claim 14
Dependent Claim
11 words
A salt-insensitive thickener prepared according to the method of claim 1.
Claim 15
Dependent Claim
11 words
A salt-insensitive thickener prepared according to the method of claim 3.
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) | 1986-12-12 | 1987-06-13 | 1987-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-12-12 | 1991-06-13 | 1991-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-12-12 | 1995-06-13 | 1995-12-13 | $7700.00 | Window Closed / Lapsed |