Method of activating N-methyl-2-pyrrolidone (NMP) varnish and paint remover solvents for removal of organic coatings
US5334331A · kind A · utility
46Cited by
20References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1993 |
| Grant date | Aug 2, 1994 |
| Priority date | — |
| Expiry date | Jan 12, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D7/3209
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This invention is directed to an environmentally safe, water soluble stripping composition comprising between about 30 and about 98.5 wt. % N-methylpyrrolidone or a 10/90 to 90/10 mixture of N-methylpyrrolidone and gamma-butyrolactone and between about 0.1 and about 5 wt. % cyclomethicone. The invention also concerns the use of this composition in a process for stripping organic coatings such as paints, resins, varnishes and shellac from substrates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.