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US4299755A
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Non-aqueous dispersions of water-soluble polymers
Assignee: Bayer AG
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Filing: 1980-06-24
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Granted: 1981-11-10
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Expires: 2000-06-24
Abstract
Abstract Stable non-aqueous dispersions having a high solids content which can rapidly be dissolved in water without forming lumps consist of water-soluble polymers, dispersing oil, sorbitan fatty acid esters and ehtoxylation products of fatty acids and/or fatty alcohols. The dispersions may be used, for example, as flocculating agents, retention agents, drilling auxiliaries and flooding additive.
Inventors
- 👤 Berthold Keggenhoff
- 👤 Hans J. Rosenkranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:22
CPC Classifications
C; C08; C08F; C08F2/00; C08F2/32
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
132 words
A non-aqueous dispersion of a water-soluble polymer consisting of (a) 45-60 parts by weight of a water-soluble polymer prepared by the addition polymerization of an unsaturated water-soluble monomer; (b) 25-45 parts by weight of a dispersing oil which is a liquid aliphatic or aromatic hydrocarbon, a substitution product thereof or a mixture thereof; (c) 3-8 parts by weight of a member selected from the group consisting of a sorbitan monooleate, sorbitan stearate, sorbitan laurate and sorbitan plamitate; and (d) 3-8 parts by weight of the reaction product of 3 to 10 mol of ethylene oxide and 1 mol of a member selected from the group consisting of C 8 -C 20 fatty alcohols and C 10 -C 20 fatty acids, the sum of components (a) to (d) being 100 parts by weight.
Claim 2
Dependent Claim
132 words
A non-aqueous dispersion of a water-soluble polymer consisting of (a) 45-60 parts by weight of a water-soluble polymer prepared by the addition polymerization of an unsaturated water-soluble monomer; (b) 25-45 parts by weight of a dispersing oil which is a liquid aliphatic or aromatic hydrocarbon, a substitution product thereof or a mixture thereof; (c) 3-8 parts by weight of a member selected from the group consisting of a sorbitan monooleate, sorbitan stearate, sorbitan laurate and sorbitan plamitate; and (d) 3-8 parts by weight of the reaction product of 3 to 10 mol of ethylene oxide and 1 mol of a member selected from the group consisting of C 8 -C 20 fatty alcohols and C 10 -C 20 fatty acids, the sum of components (a) to (d) being 100 parts by weight.
Claim 3
Dependent Claim
79 words
A non-aqueous dispersion of claim 1 containing 3 to 10 parts by weight of water-soluble wetting agent per 100 parts of dispersion, said wetting agent being an ethoxylated alkyl or aralkyl phenol having 8 to 20 carbon atoms in the alkyl or aralkyl group, an ethoxylated fatty alcohol having 8 to 20 carbon atoms with 11 to 50 ethylene oxide units or an ethoxylated fatty acid having 12 to 20 carbon atoms with 11 to 50 ethylene oxide units.
Claim 4
Dependent Claim
18 words
A non-aqueous dispersion of claim 1 wherein component (b) is a saturated aliphatic C 8 -C 20 hydrocarbon.
Claim 5
Dependent Claim
30 words
A non-aqueous dispersion of claim 1 wherein component (a) is polyacrylamide, a polyacrylic acid, a copolymer of acrylamide and acrylic acid or a copolymer of acrylamide and dimethylamino ethyl methacrylate.
References Cited (Backward Citations)
US4029622A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |