Processes for the preparation of hydroxygallium phthalocyanine
US5521306A · kind A · utility
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34Claims
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Key dates
| Filing date | Apr 26, 1994 |
| Grant date | May 28, 1996 |
| Priority date | — |
| Expiry date | Apr 26, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09B67/0026
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for the preparation of Type V hydroxygallium phthalocyanine which comprises the in situ formation of an alkoxy-bridged gallium phthalocyanine dimer, hydrolyzing said alkoxy-bridged gallium phthalocyanine dimer to hydroxygallium phthalocyanine, and subsequently converting the hydroxygallium phthalocyanine product obtained to Type V hydroxygallium phthalocyanine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.