US4541931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid neutral one package coagulating agents for lacquers and coating materials
Assignee: Henkel AG and Co KGaA
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Filing: 1984-05-04
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Granted: 1985-09-17
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Expires: 2004-05-04
Abstract
Abstract A one package coagulating agent for lacquer and coating material contaminants in water and a method for its use, the agent comprising (a) at least one inorganic, water soluble, alkaline earth metal salt, and (b) at least one water soluble, cationically modified, polyethylene imine, the salt and imine being present in a mol ratio of about 50-1:1 respectively.
Inventors
- 👤 Juergen Geke
- 👤 Hans-Joerg Rehm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:56
CPC Classifications
C; C09; C09D; C09D7/00; C09D7/71
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A one package method of coagulating lacquers and coating material contaminants in water comprising adding a coagulation-effective amount of a coagulating agent comprising an aqueous solution with a pH of about 6 to 9 of (a) at least one inorganic, water soluble, alkaline earth metal salt and (b) at least one water soluble, cationically modified, polyethylene imine or its ammonium salt, said alkaline earth metal salt and imine being present in a mol ratio of about 50-1:1, respectively; wherein the ingredients of said coagulating agent are added to the water to be treated so that said at least one alkaline earth metal salt is added in an amount of about 1 to 50 ppm per operating hour of the coagulating method and so that said at least one imine is added in an amount of about 0.1 to 20 ppm per operating hour of the coagulating method.
Claim 2
Dependent Claim
147 words
A one package method of coagulating lacquers and coating material contaminants in water comprising adding a coagulation-effective amount of a coagulating agent comprising an aqueous solution with a pH of about 6 to 9 of (a) at least one inorganic, water soluble, alkaline earth metal salt and (b) at least one water soluble, cationically modified, polyethylene imine or its ammonium salt, said alkaline earth metal salt and imine being present in a mol ratio of about 50-1:1, respectively; wherein the ingredients of said coagulating agent are added to the water to be treated so that said at least one alkaline earth metal salt is added in an amount of about 1 to 50 ppm per operating hour of the coagulating method and so that said at least one imine is added in an amount of about 0.1 to 20 ppm per operating hour of the coagulating method.
Claim 3
Dependent Claim
36 words
The method of claim 1 wherein said at least one alkaline earth metal salt is a calcium salt or a magnesium salt and said at least one imine has been modified by protonation or by methylation.
Claim 4
Dependent Claim
27 words
The method of claim 2 wherein said alkaline earth metal salt is at least one of calcium chloride, calcium nitrate, magnesium chloride, magnesium nitrate or magnesium sulfate.
Claim 5
Dependent Claim
12 words
The method of claim 1 wherein said mol ratio is about 15-5:1.
Claim 6
Dependent Claim
22 words
The method of claim 2 wherein said imine has a weight-average molecular weight of about from 5×10 4 to 5×10 7 .
Claim 7
Dependent Claim
22 words
The method of claim 2 wherein said imine has a weight-average molecular weight of about from 7.5×10 4 to 5×10 6 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-09-16 | 1989-03-18 | 1989-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-16 | 1993-03-18 | 1993-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-16 | 1997-03-18 | 1997-09-17 | $7700.00 | Window Closed / Lapsed |