Process for the preparation and conditioning of copper phthalocyanine
US4077972A · kind A · utility
5Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1976 |
| Grant date | Mar 7, 1978 |
| Priority date | — |
| Expiry date | Apr 2, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00087
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process and apparatus for conditioning crude copper phthalocyanine pigment prepared in a solvent-free process which comprises kneading at a shear gradient of 300-20,000 sec..sup.-1 for 10 seconds to 15 minutes and with an energy comsumption of 0.4-50 KWH/Kg. of copper phthalocyanine, a mixture of PA1 1. 1.0 part crude copper phthalocyanine which has not previously been subjected to extractive boiling; PA1 2. 0.1-20 parts of a salt which is soluble in water or in aqueous acids or bases; and PA1 3. 0.3-5 parts of an organic or inorganic solvent or mixture thereof which does not have significant amounts of the pigment or the salt.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.