Claims
- 1. A method for the detackification of oversprayed paint in a paint spray operation wherein said oversprayed paint comes into contact with water of a waste water system, comprising:
- dosing said water of said waste water system with a composition comprising a polymer and aluminum sulfate,
- said polymer consisting essentially of from about 10 to about 50 mole percent of cationic mer units of monoethylenically unsaturated monomer, selected from dimethylaminoethylmethacrylate methyl chloride quaternary ammonium salt, dimethylaminoethylmethacrylate methyl sulfate quaternary ammonium salt, and acrylamidopropyltrimethyl ammonium chloride, and from about 50 to about 90 mole percent of (meth)acrylamide mer units,
- said polymer having an intrinsic viscosity of from about 1.2 to about 4.0,
- said composition containing from about 0.2 to about 10.0 parts by weight of aluminum sulfate as the octadecahydrate for each part by weight of said polymer,
- wherein said composition is present in said water of said waste water system in sufficient amount to detackify oversprayed paint when said oversprayed paint comes into contact with said water.
- 2. The method of claim 1 wherein said polymer consists essentially of from about 15 to about 35 mole percent of said cationic mer units and from about 65 to about 85 mole percent of (meth)acrylamide mer units.
- 3. The method of claim 1 wherein said polymer has an intrinsic viscosity of from about 1.2 to about 3.8.
- 4. The method of claim 1 wherein said composition contains from about 0.5 to about 5.0 parts by weight of aluminum sulfate as the octadecahydrate for each part by weight of said polymer.
- 5. The method of claim 1 wherein said polymer consists essentially of from about 20 to 30 mole percent of said cationic mer units and from about 70 to about 80 mole percent of (meth)acrylamide units;
- wherein said polymer has an intrinsic viscosity of from about 1.2 to about 3.8; and
- wherein said composition contains from about 0.5 to about 5.0 parts by weight of aluminum sulfate as the octadecahydrate for each part by weight of said polymer.
- 6. The method of claim 1 wherein said water is dosed with said composition in sufficient amount to provide a concentration of said polymer and said aluminum sulfate, as the octadecahydrate, in said water of from about 1 to about 1,000 ppm.
- 7. The method of claim 1 wherein said water is dosed with said composition in sufficient amount to detackify oversprayed paint and provide a cohesive sludge formation.
- 8. The method of claim 1 wherein said polymer and said aluminum sulfate are in the form of an aqueous solution when said water is dosed therewith.
- 9. The method of claim 1 wherein said polymer has an intrinsic viscosity of from about 2.2 to about 4.0.
- 10. The method of claim 9 wherein said cationic mer units of monoethylenically unsaturated monomer are substantially dimethylaminoethylmethacrylate methyl chloride quaternary ammonium salt mer units.
- 11. The method of claim 9 wherein said cationic mer units of monoethylenically unsaturated monomer are substantially dimethylaminoethylmethacrylate methyl sulfate quaternary ammonium salt mer units.
- 12. The method of claim 9 wherein said cationic mer units of monoethylenically unsaturated monomer are substantially acrylamidopropyltrimethyl ammonium chloride mer units.
- 13. A method for the detackification of oversprayed paint in a paint spray operation wherein said oversprayed paint comes into contact with water of a waste water system, comprising:
- dosing said water of said waste water system with a composition comprising a polymer and aluminum sulfate,
- said polymer consisting essentially of from about 10 to about 50 mole percent of cationic mer units of monoethylenically unsaturated monomer, selected from dimethylaminoethylmethacrylate methyl chloride quaternary ammonium salt, dimethylaminoethylmethacrylate methyl sulfate quaternary ammonium salt, and acrylamidopropyltrimethyl ammonium chloride, and from about 50 to about 90 mole percent of (meth)acrylamide mer units,
- said polymer having an intrinsic viscosity of from about 2.2 to about 3.8,
- said composition containing from about 0.2 to about 10.0 parts by weight of aluminum sulfate as the octadecahydrate for each part by weight of said polymer,
- wherein said composition is present in said water of said waste water system in sufficient amount to detackify oversprayed paint when said oversprayed paint comes into contact with said water.
Parent Case Info
This is a division of application Ser. No. 07/681,751, filed Apr. 8, 1991 now U.S. Pat. No. 5,116,514.
US Referenced Citations (13)
Non-Patent Literature Citations (2)
Entry |
Huang, "Paint Spray Booth Sludge Handling" presentation at SME Automation of Paint Lines, Apr. 1987 at Chicago, Ill. |
Countenay, "Troublesome Paint Sludge Becomes Plant Fuel Under New Process", Wards Auto World, 1984. |
Divisions (1)
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Number |
Date |
Country |
Parent |
681751 |
Apr 1991 |
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