Photobleach system, composition and process
US4524014A · kind A · utility
11Cited by
9References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 17, 1983 |
| Grant date | Jun 18, 1985 |
| Priority date | — |
| Expiry date | Feb 17, 2003 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06L4/50
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A photobleach system is disclosed comprising a synergistic mixture of an electron donor and a visible/ultraviolet radiation absorbing compound (a chromophore acceptor) which is capable of, in an excited electronic state, undergoing electron transfer from said electron donor. A composition comprising said photobleach system and use of the system or composition in bleaching dyes and textiles are also disclosed. A preferred electron donor is sodium sulphite. Preferred chromophore acceptors are water-soluble metallated phthalocyanines and naphtalocyanines.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.