N-methylpyrrolidone, dimethyl ester and terpene-containing, paint removing composition
US5932530A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 11, 1996 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Oct 11, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D9/005
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A synergistic paint removing composition is disclosed which comprises a plurality of known solvents in very specific proportions, namely: 5 to 55% of N-methyl pyrrolidone, 6 to 45% of a dibasic ester, 5 to 40% of a terpene derivative, 2 to 15% of ethylene glycol monoethyl ether acetate and 1 to 5% of a wetting agent, all of the above percentages being expressed by weight. This composition is partially miscible in water even though some of its constituents are not water miscible, thereby making the composition easy to wash and thus preventing oily film to be left on the treated substrate. The composition according to the invention is normally in liquid form. If desired, for some applications, a thickening agent can be added thereto to convert it to a gel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.