Aromatic hydrocarbons, dimethylformamide and N-methyl pyrrolidone -containing, paint removing composition
US5952277A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 18, 1997 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Feb 18, 2017 |
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 particular selection of a plurality of known solvents in very specific proportions, namely: from 20 to 45% of aromatic hydrocarbons; from 15 to 25% of dimethylformamide; from 15 to 25% of N-methyl pyrrolidone; from 5 to 15% of a water-immiscible compound selected from the group consisting of terpene derivatives, oleoresins and mixtures thereof; and from 0.5 to 4% of at least one wetting agent, all 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 a 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.