Ink for use in ink jet recording and ink jet recording method utilizing the same
US6964700B2 · kind B2 · utility
21Cited by
20References
13Claims
0Family size
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Key dates
| Filing date | Apr 23, 2004 |
| Grant date | Nov 15, 2005 |
| Priority date | — |
| Expiry date | Apr 23, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/40
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An ink for use in ink jet recording which contains a dye and a pigment as colorants. The pigment is a self-dispersible pigment in which at least one anionic group is bonded directly or through another atomic group to a surface of the pigment, the dye is an anionic dye, 2-pyrrolidone is further contained in the ink as a solvent, and the mass-based content X of 2-pyrrolidone in the ink and the ratio Y of the pigment to the sum of the dye and the pigment satisfy the following formulas 1 to 3 at the same time:12≦X<30 formula 150≦Y≦75 formula 2Y≧−2X+84 formula 3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.