Substituted phthalocyanine
US4824948A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1988 |
| Grant date | Apr 25, 1989 |
| Priority date | — |
| Expiry date | Mar 1, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03G9/0918
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A phthalocyanine compound of the formula: EQU (R--X--).sub.m Pc (--Y--R.sup.1 --Z--).sub.n (--SO.sub.3 M).sub.p I wherein PA1 Pc is a phthalocyanine nucleus (Pc); each PA1 R independently is a monovalent aromatic radical linked to a peripheral carbon atom of the Pc nucleus through X; PA1 X selected from S, Se and Te; PA1 m is 4 to 16; each PA1 R.sup.1 independently is a divalent aromatic radical linked to two adjacent peripheral carbon atoms of the Pc nucleus through Y and Z; PA1 Y is selected from S, NT, Se and Te; PA1 Z is selected from S, Se, Te, NT and O; PA1 T is selected from H, alkyl and aryl; PA1 n is 0 to 7; PA1 M is H, a metal or optionally-substituted ammonium; and PA1 P is from 1 to 16. The compounds have a significant absorption band in the near infra red and depending on the number of sulphonic acids groups and the nature of the counter ion are soluble in aqueous and polar organic media. The compounds are useful in many applications where absorption of infra-red radiation is desirable, such as in OCR readable inks, rapid-drying inks, security printing and reprographic toners.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.