Ink, ink cartridge and ink jet recording method
US8986435B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 2013 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Mar 12, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B47/26
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention provides an ink containing a coloring material and a water-soluble organic solvent, wherein the coloring material is a compound represented by the following general formula (1), and the water-soluble organic solvent includes an alkanediol having 4 to 6 carbon atoms:wherein rings A, B, C and D each indicated by a broken line are, independently of one another, a benzene ring or a nitrogen-containing heteroaromatic ring, the number of the nitrogen-containing heteroaromatic ring is more than 0.0 and 3.0 or less, the remainder is the benzene ring, R1 is an alkyl group, R2 is an alkylene group, X is an anilino group having one or more sulfonic groups, m is more than 0.0 and less than 3.9, n is 0.1 or more and less than 4.0, and the sum of m and n is 1.0 or more and less than 4.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.