USRE28576E - Process for rapid dissolving water-soluble vinyl addition polymers using water-in-oil emulsions - Google Patents
Process for rapid dissolving water-soluble vinyl addition polymers using water-in-oil emulsions Download PDFInfo
- Publication number
- USRE28576E USRE28576E US41384873A USRE28576E US RE28576 E USRE28576 E US RE28576E US 41384873 A US41384873 A US 41384873A US RE28576 E USRE28576 E US RE28576E
- Authority
- US
- United States
- Prior art keywords
- water
- emulsion
- oil
- vinyl addition
- polymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/02—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques
- C08J3/03—Making solutions, dispersions, lattices or gels by other methods than by solution, emulsion or suspension polymerisation techniques in aqueous media
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5227—Processes for facilitating the dissolution of solid flocculants in water
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2300/00—Characterised by the use of unspecified polymers
- C08J2300/10—Polymers characterised by the presence of specified groups, e.g. terminal or pendant functional groups
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Water Supply & Treatment (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Colloid Chemistry (AREA)
Abstract
Water-soluble vinyl addition polymers may be rapidly dissolved in water by first dispersing these polymers into a water-in-oil emulsion and then inverting these emulsions in water. The inversion of the emulsion releases the polymer into water as a solution.
Claims (29)
1. A METHOD OF RAPIDLY DISSOLVING WATER-SOLUBLE VINYL ADDITION POLYMERS INTO WATER, WHICH COMPRISES THE STEPS OF: (A) PREPARING A WATER-INOIL EMULSION WHICH CONTAINS DISPERSED THEREIN (A) FROM 5 TO 75 PERCENT BY WEIGHT OF FINELY-DIVIDED WATER-SOLUBLE VINYL ADDITION POLYMER, (THEREBY PROVIDING A POLYMER-CONTAINING EMULSION) SAID EMULSION HAVING AN OIL-TO-WATER RATIO BETWEEN 5:1 1:10 AND SAID OIL BEING A HYDROCARBON LIQUID, AND THEN, (B) INVERTING SAID EMULSION IN WATER WHEREBY THE WATER-SOLUBLE VINYL ADDITION POLYMER IS RELEASED INTO THE WATER AS A SOLUTION.
2. The method of claim 1 where the polymer-containing emulsion is inverted by means of agitation.
3. The method of claim 1 where the emulsion is inverted by means of a surfactant.
4. A method of rapidly dissolving water-soluble vinyl addition polymers into water, which comprises the steps of: (A) preparing a water-in-oil emulsion which contains dispersed therein (at least 2%) from 5 to 75 percent by weight of particles of a water-soluble vinyl addition polymer (ranging in) having an average size in the range of from 5 millimicrons to 5 millimeters (of a water-soluble vinyl addition polymer;) , (thereby providing a polymer-containing emulsion) said emulsion having an oil-to-water ratio between 5:1 - 1:10 and said oil being a hydrocarbon liquid ; and then (B) inverting said polymer-containing emulsion by adding it to water which contains from 0.01 to 50% by weight of a surfactant based on the weight of the polymer (of a surfactant whereby the water-soluble vinyl addition polymer is relased into the water as a solution) .
5. The method of claim 4 where the surfactant is a water-soluble surfactant.
6. The method of claim 5 where the surfactant is present in the water in an amount ranging from 1.0 to 10% by weight.
7. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises the steps of: (A) preparing a water-in-oil emulsion which contains dispersed therein from 5 to 75% by weight of particles of a water-soluble vinyl addition polymer (ranging in) having an average size in the range of from 5 millicrons to 5 microns (of a water-soluble vinyl addition polymer) , said emulsion having an oil-to-water ratio between 5:1 - 1:10 and said oil being a hydrocarbon liquid ; and then, (B) inverting said polymer-containing emulsion by adding it to water in an amount to provide an aqueous solution of from 0.1 to 20% by weight of polymer (to water which contains) , said water containing from 1.0 to 10% (by weight of the polymer) of a water soluble surfactant based upon the weight of the polymer (whereby the water-soluble vinyl addition polymer is released into the water as a solution) .
8. A method of rapidly dissolving water-soluble vinyl addition polymers into water, which comprises the steps of: (A) preparing a water-in-oil emulsion which contains dispersed therein (a) from 5 to 75 percent by weight of finely-divided water-soluble vinyl addition polymer and a compatible water-soluble surfac-(tant, thereby providing a polymer-containing emulsion;) tant, said emulsion having an oil-to-water ratio between 5:1 and 1:10 and said oil being hydrocarbon liquid; and then, (B) inverting said emulsion in water whereby the water-soluble vinyl addition polymer is released into the water as a solution.
9. The method of claim 8 where the polymer-containing emulsion is inverted by means of agitation.
10. A method of rapidly dissolving water-soluble vinyl addition polymers into water, which comprises the steps oF: (A) preparing a water-in-oil emulsion which contains (dispersed therein) from 5 to 75 percent (at least 2%) by weight of dispersed particles of a water-soluble vinyl addition polymer (ranging in) having an average size in the range of from 5 millimicrons to 5 millimeters (of a water-soluble vinyl addition polymer) and a compatible water-soluble surfactant, (thereby providing a polymer containing emulsion) said emulsion having an oil-to-water ratio between 5:1 - 1:10 and said oil being a hydrocarbon liquid ; and then, (B) inverting said emulsion in water whereby the water-soluble vinyl addition polymer is released into the water as a solution.
11. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises the steps of: (A) preparing a water-in-oil emulsion which contains (dispersed therein) from 5 to 75% by weight of dispersed particles of a water-soluble vinyl addition polymer (ranging in) having an average size in the range of from 5 millimicrons to 5 microns (of a water-soluble vinyl addition polymer) and a compatible water-soluble surfactant, said emulsion having an oil-to-water ratio between 5:1 - 1:10 and said oil being a hydrocarbon liquid; and then, (B) inverting said emulsion in water whereby the water-soluble vinyl addition polymer is released into the water as a solution.
12. The method of claim 1 where the water-soluble vinyl addition polymer is a polyacrylic acid.
13. The method of claim 8 where the water-soluble vinyl addition polymer is a polyacrylic acid.
14. A METHOD OF RAPIDLY DISSOLVING WATER-SOLUBLE VINYL ADDITION POLYMERS INTO WATER WHICH COMPRISES INVERTING IN WATER A WATER-IN-OIL EMULSION CONTAINING FROM 5 TO 75 PERCENT BY WEIGHT OF DISPERSED FINELY DIVIDED WATER-SOLUBLE VINYL ADDITION POLYMER, SAID EMULSION HAVING AN OIL-TO-WATER RATIO BETWEEN 5:1 -1:10 AND SAID OIL BEING A HYDROCARBON LIQUID.
15. The method of claim 14 wherein said emulsion is inverted by agitation.
16. The method of claim 14 wherein said emulsion is inverted in the presence of a surfactant.
17. The method of claim 16 wherein the surfactant is water-soluble.
18. The method of claim 14 wherein said water-soluble vinyl addition polymer is polyacrylic acid.
19. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises inverting a water-in-oil emulsion by adding it to water, said emulsion containing dispersed therein from 5 to 75 percent by weight of particles of a water-soluble vinyl addition polymer having an average size in the range of from 5 millimicrons to 5 millimeters, said emulsion having an oil-to-water ratio between 5:1 - 1:10, said oil being a hydrocarbon liquid and said water containing from 0.1 to 50% by weight of a surfactant based on the weight of the polymer.
20. The method of claim 19 wherein the surfactant is water-soluble.
21. The method of claim 19 wherein said water contains from 1.0 to 10% by weight of a surfactant based on the weight of the polymer.
22. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises inverting a water-in-oil emulsion by adding it to water, said emulsion containing dispersed therein from 5 to 75% by weight of particles of a water-soluble vinyl addition polymer having an average size in the range of from 5 millimicrons to 5 microns, said emulsion having an oil-to-water ratio between 5:1 - 1:10, said oil being a hydrocarbon liquid, said water containing from 1.0 to 10% of a water-soluble surfaCtant based on the weight of the polymer, and said emulsion being added in an amount to provide an aqueous solution containing from 0.1 to 20% by weight of polymer.
23. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises inverting a water-in-oil emulsion in water, said emulsion containing from 5 to 75 percent by weight of dispersed finely divided water-soluble vinyl addition polymer and a compatible water-soluble surfactant, said emulsion having an oil-to-water ratio between 5:1 - 1:10 and said oil being a hydrocarbon liquid.
24. The method of claim 23 wherein said emulsion is inverted by agitation.
25. The method of claim 23 wherein said polymer is in the form of particles having an average size in the range of from 5 millimicrons to 5 millimeters.
26. The method of claim 23 wherein said water-soluble vinyl addition polymer is polyacrylic acid.
27. A method of rapidly dissolving water-soluble vinyl addition polymers into water which comprises inverting a water-in-oil emulsion by adding it to water, said emulsion containing from 5-75% by weight of dispersed particles of a water-soluble vinyl addition polymer having an average size in the range of from 5 millimicrons to 5 microns, said emulsion also containing a compatible water-soluble surfactant, said emulsion having an oil-to-water ratio between 5:1 - 1:10 and being added in an amount to provide an aqueous solution of from 0.1 to 20% by weight of polymer, and said oil being a hydrocarbon liquid.
28. The method of claim 1 wherein said oil is an aliphatic hydrocarbon liquid.
29. The method of claim 14 wherein said oil is an aliphatic hydrocarbon liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US41384873 USRE28576E (en) | 1970-12-15 | 1973-11-09 | Process for rapid dissolving water-soluble vinyl addition polymers using water-in-oil emulsions |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US92031A US3624019A (en) | 1970-12-15 | 1970-12-15 | Process for rapidly dissolving water-soluble polymers |
| US17294671A | 1971-08-18 | 1971-08-18 | |
| US27832972A | 1972-08-07 | 1972-08-07 | |
| US41384873 USRE28576E (en) | 1970-12-15 | 1973-11-09 | Process for rapid dissolving water-soluble vinyl addition polymers using water-in-oil emulsions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| USRE28576E true USRE28576E (en) | 1975-10-21 |
| USRE28576F1 USRE28576F1 (en) | 1983-12-06 |
Family
ID=27492519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US41384873 Expired USRE28576E (en) | 1970-12-15 | 1973-11-09 | Process for rapid dissolving water-soluble vinyl addition polymers using water-in-oil emulsions |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | USRE28576E (en) |
Cited By (64)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4212784A (en) | 1979-05-04 | 1980-07-15 | Nalco Chemical Co. | Polymerization of water soluble polymers in water-in-oil latex form to produce emulsions containing high polymer solids levels and low oil levels |
| US4248304A (en) | 1979-11-16 | 1981-02-03 | Nalco Chemical Company | Large scale production of inexpensive flooding polymers for tertiary oil recovery |
| US4252706A (en) | 1979-10-31 | 1981-02-24 | Nalco Chemical Company | Method for precisely controlling the dissolution rate of high molecular weight water-soluble vinyl polymers |
| US4375529A (en) | 1981-08-03 | 1983-03-01 | Nalco Chemical Company | Hydrogenation of residual monomers in partially polymerized acrylamide copolymers in latex form |
| US4417992A (en) | 1981-07-30 | 1983-11-29 | Nalco Chemical Company | Dust control |
| US4427821A (en) | 1981-08-03 | 1984-01-24 | Nalco Chemical Company | Hydrogenation of residual monomers in partially polymerized acrylamide copolymers in latex form |
| US4443576A (en) | 1982-03-29 | 1984-04-17 | Nalco Chemical Company | Terpolymer composition |
| US4499214A (en) | 1983-05-03 | 1985-02-12 | Diachem Industries, Inc. | Method of rapidly dissolving polymers in water |
| US4508594A (en) | 1984-06-28 | 1985-04-02 | Nalco Chemical Company | Polyaldehyde/polyacetal compositions |
| US4529794A (en) | 1984-03-29 | 1985-07-16 | Diatec Polymers | Method of rapidly dissolving polymers in water |
| US4530943A (en) | 1982-08-02 | 1985-07-23 | Chemische Fabrik Stockhausen Gmbh | Process for the rapid dissolution of water-soluble polymers |
| US4552908A (en) | 1983-08-30 | 1985-11-12 | Imperial Chemical Industries Plc | Water-dilutable aqueous coating compositions |
| US4619967A (en) | 1983-05-26 | 1986-10-28 | The Dow Chemical Company | Multi-modal emulsions of water-soluble polymers |
| US4668715A (en) | 1985-03-25 | 1987-05-26 | Nalco Chemical Company | Rapid solubilization of dry polymers |
| US4687807A (en) | 1987-02-13 | 1987-08-18 | Nalco Chemical Company | Use of amidase for reducing the acrylamide content of water-in-oil emulsions containing acrylamide polymers |
| US4696962A (en) | 1983-07-30 | 1987-09-29 | Sandoz Ltd. | Hydrophilic cationic copolymers of acrylamide or methacrylamide |
| US4734103A (en) | 1987-07-22 | 1988-03-29 | Nalco Chemical Company | Viscosity/drag reducing additive for high solids black liquor |
| US4742114A (en) | 1987-02-13 | 1988-05-03 | Nalco Chemical Company | Water-in-oil emulsions of amidase |
| US4745154A (en) | 1986-04-14 | 1988-05-17 | Alco Chemical Corporation | Water soluble polymers, their preparation and their uses |
| US4751259A (en) | 1987-08-05 | 1988-06-14 | Nalco Chemical Company | Compositions for iron ore agglomeration |
| US4786679A (en) | 1987-02-13 | 1988-11-22 | Nalco Chemical Company | Water-in-oil emulsions of amidase |
| US4786318A (en) | 1986-08-14 | 1988-11-22 | Nalco Chemical Company | Thickening of gold process slurries |
| US4795789A (en) | 1987-10-26 | 1989-01-03 | Nalco Chemical Company | Process for making acrylamido methane sulfonic acid polymers |
| US4800071A (en) | 1988-05-03 | 1989-01-24 | Nalco Chemical Company | Filtration aids for removal of calcium solids from aqueous phosphoric acid |
| US4845192A (en) * | 1984-03-29 | 1989-07-04 | Diatec Polymers | Method of rapidly dissolving polymer gels in water |
| US4915859A (en) | 1988-09-16 | 1990-04-10 | Nalco Chemical Company | Micro-emulsion drawing fluids for steel and aluminum |
| US4921903A (en) | 1988-10-11 | 1990-05-01 | Nalco Chemical Company | Process for preparing high molecular weight hydrophobic acrylamide polymers |
| US4952642A (en) | 1987-10-26 | 1990-08-28 | Nalco Chemical Company | Process for making acrylamido methane sulfonic acid polymers |
| US4954547A (en) | 1987-04-23 | 1990-09-04 | Nalco Chemical Company | Use of fatty acids for improvement in shear stability of water-in-oil emulsions |
| US5006596A (en) | 1990-02-09 | 1991-04-09 | Betz Laboratories, Inc. | Self-inverting, water-in-oil emulsions |
| US5100561A (en) * | 1990-06-06 | 1992-03-31 | Betz Laboratories, Inc. | Cationic polymers for sludge dewatering |
| US5124376A (en) * | 1991-04-22 | 1992-06-23 | Phillips Petroleum Company | Use of phenol as rapid inverse latex inversion promoter and solution viscosity enhancer |
| US5132285A (en) * | 1988-04-26 | 1992-07-21 | National Starch And Chemical Investment Holding Corporation | Method for thickening or stabilizing aqueous media with polyamphoteric polysaccharides |
| US5132284A (en) * | 1988-04-26 | 1992-07-21 | National Starch And Chemical Investment Holding Corporation | Polyamphoteric polysaccharide graft copolymers neutrally charged |
| FR2672294A1 (en) * | 1991-02-01 | 1992-08-07 | Protex Manuf Prod Chimiq | Process for the preparation of a composition based on synthetic thickeners |
| US5176748A (en) * | 1988-07-05 | 1993-01-05 | Bercen, Inc. | Alkenyl succinic anhydride emulsion |
| US5183576A (en) * | 1990-06-06 | 1993-02-02 | Betz Laboratories, Inc. | Cationic polymers for sludge dewatering |
| US5356988A (en) * | 1991-07-17 | 1994-10-18 | Cargill, Incorporated | Acrylic polymer aqueous dispersion made through a micro dispersion |
| US5368744A (en) * | 1993-08-03 | 1994-11-29 | Betz Laboratories, Inc. | Methods for treating wastewater |
| US5395897A (en) * | 1994-01-18 | 1995-03-07 | Nalco Chemical Company | High molecular weight substituted amides from polycarboxylic acids |
| EP0702037A1 (en) | 1994-09-16 | 1996-03-20 | Betz Europe, Inc. | Water soluble graft copolymers for deinking process water clarification |
| US5512636A (en) * | 1994-09-06 | 1996-04-30 | Betz Laboratories, Inc. | Cationic graft polymer agglomeration agents for mineral bearing ores |
| US5639397A (en) * | 1996-04-12 | 1997-06-17 | Betzdearborn Inc. | Method for suppressing dust emissions |
| US5730905A (en) * | 1994-06-21 | 1998-03-24 | Betzdearborn Inc. | Method of resolving oil and water emulsions |
| US5800719A (en) * | 1997-05-14 | 1998-09-01 | Betzdearborn Inc. | Method for dewatering drinking sludge using a water soluble block copolymer |
| US5837215A (en) * | 1995-07-26 | 1998-11-17 | Nalco Chemical Company | Method of removing insoluble materials from bayer process with fatty acid and fatty acid free polymer flocculants |
| US6210585B1 (en) | 1995-07-26 | 2001-04-03 | Nalco Chemical Company | Fatty acid free latex polymer flocculants |
| US20040192840A1 (en) * | 2002-11-04 | 2004-09-30 | Ge Betz, Inc. | Modified polymeric flocculants with improved performance characteristics |
| US20050143506A1 (en) * | 2003-12-15 | 2005-06-30 | Harrington John C. | Inversion of inverse emulsion polymers |
| US20060127351A1 (en) * | 2004-12-14 | 2006-06-15 | Hercules Incorporated | Process for preparing high molar mass polymers |
| US20060185806A1 (en) * | 2004-12-14 | 2006-08-24 | Harrington John C | Retention and drainage aids |
| US7250448B2 (en) | 2001-12-07 | 2007-07-31 | Hercules Incorporated | Anionic copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions |
| US7396874B2 (en) | 2002-12-06 | 2008-07-08 | Hercules Incorporated | Cationic or amphoteric copolymers prepared in an inverse emulsion matrix and their use in preparing cellulosic fiber compositions |
| WO2012065283A1 (en) | 2010-11-18 | 2012-05-24 | General Electric Company | Methods for improving membrane bioreactor systems |
| US8852400B2 (en) | 2010-11-02 | 2014-10-07 | Ecolab Usa Inc. | Emulsification of alkenyl succinic anhydride with an amine-containing homopolymer or copolymer |
| WO2017065740A1 (en) | 2015-10-12 | 2017-04-20 | Solenis Technologies, L.P. | Method of increasing drainage performance of a pulp slurry during manufacture of paper products, and products therefrom |
| US9701791B2 (en) | 2015-09-08 | 2017-07-11 | Jacam Chemical Company 2013, Llc | Poly alkanolamine emulsion breakers |
| US9701830B1 (en) | 2015-12-17 | 2017-07-11 | Jacam Chemical Company 2013, Llc | Emulsified polyol acrylate polymeric emulsion breakers |
| US9702086B2 (en) | 2014-10-06 | 2017-07-11 | Ecolab Usa Inc. | Method of increasing paper strength using an amine containing polymer composition |
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| US10145067B2 (en) | 2007-09-12 | 2018-12-04 | Ecolab Usa Inc. | Method of improving dewatering efficiency, increasing sheet wet web strength, increasing sheet wet strength and enhancing filler retention in papermaking |
| US10648133B2 (en) | 2016-05-13 | 2020-05-12 | Ecolab Usa Inc. | Tissue dust reduction |
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Cited By (73)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4212784A (en) | 1979-05-04 | 1980-07-15 | Nalco Chemical Co. | Polymerization of water soluble polymers in water-in-oil latex form to produce emulsions containing high polymer solids levels and low oil levels |
| US4252706A (en) | 1979-10-31 | 1981-02-24 | Nalco Chemical Company | Method for precisely controlling the dissolution rate of high molecular weight water-soluble vinyl polymers |
| US4248304A (en) | 1979-11-16 | 1981-02-03 | Nalco Chemical Company | Large scale production of inexpensive flooding polymers for tertiary oil recovery |
| US4417992A (en) | 1981-07-30 | 1983-11-29 | Nalco Chemical Company | Dust control |
| US4375529A (en) | 1981-08-03 | 1983-03-01 | Nalco Chemical Company | Hydrogenation of residual monomers in partially polymerized acrylamide copolymers in latex form |
| US4427821A (en) | 1981-08-03 | 1984-01-24 | Nalco Chemical Company | Hydrogenation of residual monomers in partially polymerized acrylamide copolymers in latex form |
| US4443576A (en) | 1982-03-29 | 1984-04-17 | Nalco Chemical Company | Terpolymer composition |
| US4530943A (en) | 1982-08-02 | 1985-07-23 | Chemische Fabrik Stockhausen Gmbh | Process for the rapid dissolution of water-soluble polymers |
| US4499214A (en) | 1983-05-03 | 1985-02-12 | Diachem Industries, Inc. | Method of rapidly dissolving polymers in water |
| US4619967A (en) | 1983-05-26 | 1986-10-28 | The Dow Chemical Company | Multi-modal emulsions of water-soluble polymers |
| US4696962A (en) | 1983-07-30 | 1987-09-29 | Sandoz Ltd. | Hydrophilic cationic copolymers of acrylamide or methacrylamide |
| US4552908A (en) | 1983-08-30 | 1985-11-12 | Imperial Chemical Industries Plc | Water-dilutable aqueous coating compositions |
| US4529794A (en) | 1984-03-29 | 1985-07-16 | Diatec Polymers | Method of rapidly dissolving polymers in water |
| US4845192A (en) * | 1984-03-29 | 1989-07-04 | Diatec Polymers | Method of rapidly dissolving polymer gels in water |
| US4508594A (en) | 1984-06-28 | 1985-04-02 | Nalco Chemical Company | Polyaldehyde/polyacetal compositions |
| US4668715A (en) | 1985-03-25 | 1987-05-26 | Nalco Chemical Company | Rapid solubilization of dry polymers |
| US4745154A (en) | 1986-04-14 | 1988-05-17 | Alco Chemical Corporation | Water soluble polymers, their preparation and their uses |
| US4786318A (en) | 1986-08-14 | 1988-11-22 | Nalco Chemical Company | Thickening of gold process slurries |
| US4742114A (en) | 1987-02-13 | 1988-05-03 | Nalco Chemical Company | Water-in-oil emulsions of amidase |
| US4786679A (en) | 1987-02-13 | 1988-11-22 | Nalco Chemical Company | Water-in-oil emulsions of amidase |
| US4687807A (en) | 1987-02-13 | 1987-08-18 | Nalco Chemical Company | Use of amidase for reducing the acrylamide content of water-in-oil emulsions containing acrylamide polymers |
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|---|---|
| USRE28576F1 (en) | 1983-12-06 |
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