Methods of producing polyarylamines and using them for detackifying paint and removing color from aqueous systems
US6627086B2 · kind B2 · utility
9Cited by
22References
46Claims
0Family size
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Key dates
| Filing date | Mar 21, 2001 |
| Grant date | Sep 30, 2003 |
| Priority date | — |
| Expiry date | Jun 10, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/93
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Aqueous suspensions of paints in waste waters can be treated to detackify the paint and facilitate its removal by contacting the paint suspension at a pH of from about 5 to about 14 with a polyarylamine that is produced by reacting an aldehyde with an arylamine in the presence of an acid in an aqueous suspension. The same polyarylamine can also be used for reducing the color content of highly colored liquids. Compositions containing the polyarylamine are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.