Recording liquid
US5713992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 13, 1997 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Jan 13, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a recording liquid characterized by comprising an aqueous medium and at least one monoazo dye selected from dyes, the free acid forms of which are represented by general formula {I}: ##STR1## (wherein R.sub.1, R.sub.2, and R.sub.3 each independently represents a substituted or unsubstituted alkyl group having 1 to 9 carbon atoms, an alkoxy group having 1 to 9 carbon atoms, a halogen atom, a hydrogen atom, a hydroxyl group, a substituted or unsubstituted carbamoyl group, a substituted or unsubstituted sulfamoyl group, a substituted or unsubstituted amino group, a nitro group, a sulfonic ester group, a sulfonyl group, a COOH group, or a carboxylic ester group; PA1 m represents a number of 0, 1, or 2; and PA1 R.sub.4, R.sub.5, R.sub.6, and R.sub.7 each independently represents a hydrogen atom, an alkyl group having 1 to 18 carbon atoms, an alkenyl group having 1 to 18 carbon atoms, an aryl group, an aralkyl group, an alicyclic group, or a heterocyclic group, and each may have a substituent when not representing a hydrogen atom, provided that at least one of R.sub.4, R.sub.5, R.sub.6, and R.sub.7 represents a group having a COOH group as a substituent).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.