Inks for ink jet printing
US5976231A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1998 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Jun 29, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an ink composition which comprises water, an anionic dye, and a monoquaternary cationic penetrant of the formula ##STR1## wherein R.sub.1 is either a benzyl group or an alkyl group having at least about 3 carbon atoms, R.sub.2, R.sub.3, and R.sub.4 each, independently of the others, are hydrogen atoms, methyl groups, or ethyl groups, wherein two or more R groups can be joined together to form a ring, X is an anion, and n is an integer representing the charge on the anion, wherein the ink exhibits rapid penetration when applied to plain paper. Also disclosed is a set of inks for generating multicolored images which comprises (a) a first ink as described above; and (b) a second ink comprising water and a pigment; wherein intercolor bleed between the first ink and the second ink is reduced. Further disclosed are ink jet printing processes with the ink and ink set described above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.