Methods for removing solids from water-based paint systems
US5236598A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 15, 1992 |
| Grant date | Aug 17, 1993 |
| Priority date | — |
| Expiry date | Oct 15, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/93
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A novel method of treating circulating water containing over-sprayed, water-borne paint, such as in a paint spray booth operation, comprises adjusting the alkalinity of the paint spray booth water to between about 20 and 600 ppm, on a calcium carbonate basis, by adding a designated alkalinity source thereto, adding a cationic potato starch to the water, contacting the over-sprayed, water-borne paint with the alkalinity-adjusted paint spray booth water after addition of the cationic potato starch, adding an effective amount of a polymer floccing agent to the paint spray booth water, and removing resulting sludge from the paint spray booth water.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.