Pigment
US7888398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2005 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | Mar 30, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09D11/322
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
This present invention can provide a novel pigment useful in color image displays to form blue pixels capable of providing high-level brightness and saturation, especially a finely-divided pigment which has bright hue and is excellent in pigment physical properties such as light fastness, solvent resistance and heat resistance, and a process for producing the same, a pigment dispersion making use of the pigment, and an ink for a color filters. The novel pigment is produced by forming into a pigment a subphthalocyanine represented by the following formula (1):wherein X is a halogen atom, presents diffraction peaks at diffraction angles (2θ) 7.0°, 12.3°, 20.4° and 23.4° in x-ray diffraction, and has an average particle size of 120 to 20 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.