Dyes containing polyhydroxyl groups for ink-jet printing inks
US4836851A · kind A · utility
22Cited by
6References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Feb 11, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/328
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A dye used in ink compositions for ink-jet printing comprises an aromatic dye molecule having attached to the backbone thereof from one to four polyhydroxyl-substituted groups having the formula selected from the group consisting of: PA1 (a) CH.sub.2 OH-(CHOH).sub.n CH.sub.2 O-, where n=2 to 10; PA1 (b) O.sub.n-1 C.sub.n H.sub.2n-1 -O-, where n=5 to 7; and PA1 (c) C.sub.6n H.sub.5n+1 O.sub.5n -O-, where n=1 to about 100. These dyes have improved water solubility and improved interaction with paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.