Pigmentary copper phthalocyanine solid solution and transparent dispersion comprising it
US6544325B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2001 |
| Grant date | Apr 8, 2003 |
| Priority date | — |
| Expiry date | Jul 3, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0026
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to pigmentary solid solutions comprising copper phthalocyanine (Pigment Blue 15; C.I. 74160) as host and other blue to violet pigments as guests. Preferred hosts are the &agr; (Pigment Blue 15:1), &bgr; (Pigment Blue 15:3) and &egr; (Pigment Blue 15:6) crystal forms of copper phthalocyanine, especially the &egr; crystal form. The present invention also relates to dispersions comprising solid solutions as pigment particles, and pigment derivatives as rheology improvers. Preferred dispersions of solid solutions in the e crystal lattice may be used in particular to prepare color filters for liquid-crystal displays (LCDs). The present invention also includes a process for preparing the dispersions of the invention, the solid solutions themselves, and the use thereof to pigment high molecular mass organic materials.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.