Pigment and method for producing the same
US12173162B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Sep 25, 2019 |
| Grant date | Dec 24, 2024 |
| Priority date | — |
| Expiry date | Apr 8, 2042 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/037
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A modified pigment having excellent color tone selectivity is provided by laking dye by an environmentally friendly method without using metal. A modified pigment according to the present invention is obtained by laking a dye containing at least one of an acidic group and a basic group with at least one of an amino acid and protein.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.