Liquid for removing printing and screen printing inks: butyrolactone and/or N-methyl-2-pyrrolidone and propylene glycol derivative
US4836950A · kind A · utility
37Cited by
4References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41N3/06
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A liquid for removing printing and screen printing inks comprising an essentially anhydrous mixture containing: PA0 (a) q-butyrolactone and/or N-methyl-2-pyrrolidone in an amount of 1-25% (v/v); PA0 (b) one or more propylene glycol derivatives selected from substituted propyl acetates and/or propylene glycol ethers; and optionally PA0 (c) a diluent selected from aliphatic compounds having a flash point above 22.degree. C. and a content of aromatic compounds below 1%; and/or PA0 (d) a surfactant, the amount of components (b), (c) and (d) constituting 99-75% (v/v) of the liquid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.