Processes for the preparation of squaraine compositions
US4524218A · kind A · utility
14Cited by
8References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1984 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Jan 11, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G5/0611
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed is an improved process for the preparation of squaraine compositions which comprises reacting squaric acid, an aromatic amine, and a composition selected from the group consisting of phenols and phenol squaraines, in the presence of an aliphatic alcohol, and an optional azeotropic substance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.