Ink, and recording process using the same
US5110356A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 21, 1991 |
| Grant date | May 5, 1992 |
| Priority date | — |
| Expiry date | Aug 21, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B31/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides an ink comprising a dye and a liquid medium, wherein said dye is a dye of Formula (I): ##STR1## wherein R.sub.1 and R.sub.2 represent independently an alkyl group, an alkoxy group or an acetylamino group; R.sub.3 represents --SO.sub.3 M or a hydrogen atom; R.sub.4 represents a hydrogen atom, --SO.sub.3 M or --NHR.sub.5, where R.sub.5 represents a hydrogen atom, a phenyl group that may have a substituent, or a group of the formula ##STR2## where R.sub.6 and R.sub.7 represent independently a hydrogen atom or --C.sub.2 H.sub.4 OH; M represents an alkali metal, an ammonium group or an organic ammonium group; and 1, m and n represent independently an integer of 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.