Method of making a filler from automotive paint sludge, filler, and sealant containing a filler
US5160628A · kind A · utility
19Cited by
11References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2201/00
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A method for making a filler from automotive paint sludge is provided. Paint sludge containing water, solvent and uncured polymer resin is treated by removing a first portion of the water by mechanically drying the sludge to produce a concentrated sludge, and a second portion of the water is removed by treating the sludge with a chemical drying agent to produce a dried powder. Alternatively, the second portion of the water may be removed by agitating the concentrated sludge under a vacuum to produce a dehydrated putty. The resulting dried powder or putty can then be used as a filler in sealants and other products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.