Ink for ink jet recording comprising print density improver, print density improver and method for improving print density
US7465344B2 · kind B2 · utility
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9Claims
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Key dates
| Filing date | Mar 30, 2006 |
| Grant date | Dec 16, 2008 |
| Priority date | — |
| Expiry date | Nov 12, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/38
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An aqueous ink for ink jet recording, which comprises: at least one dye; and at least one of a compound having at least one phosphonic acid group and at least one carboxyl group and a compound having at least two phosphonic acid groups as a print density improver(s), a print density improver, and a method for enhancing print density involving the use of the aforementioned print density improver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.