Process
US5753022A · kind A · utility
6Cited by
6References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 5, 1996 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Feb 5, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0035
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A method of preparing a non-aqueous dispersion of CuPc which comprises milling crude CuPc in a high boiling liquid at a temperature from 50.degree. to 150.degree. C. in the presence of a polyester amine or polyesterammonium salt and a CuPc fluidising agent. Preferred polyesterammonium salt is obtainable by reacting polyhydroxystearic acid with 3-dimethylaminopropylamine quaternised with dimethylsulphate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.