Direct alpha to X phase conversion of metal-free phthalocyanine
US3932180A · kind A · utility
5Cited by
0References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1973 |
| Grant date | Jan 13, 1976 |
| Priority date | — |
| Expiry date | Jun 4, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0696
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
Process for direct alpha to X phase conversion of metal-free phthalocyanine. In this process, the alpha polymorph of a metal-free phthalocyanine pigment can be directly converted to the X form by depositing the alpha form of the pigment on a suitable substrate followed by in situ conversion of this deposit by controlled heating. The X form of metal-free phthalocyanine is known to possess good electrophotographic speed, and, thus, can be used either alone or in combination with other photoconductive materials in electrophotography.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.