Bleach composition containing weakly to non-colored porphine photo-activator
US4400173A · kind A · utility
56Cited by
11References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 16, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Dec 16, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/0063
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Bleach compositions comprising a weakly coloring to non-coloring porphine photo-activator and process for bleaching substrates or liquids using said porphine photo-activator are disclosed. The porphine photo-activator used and as defined herein is selected such that the lowest energy allowed electronic transition of the photo-activator molecule gives rise to an absorption band (Q band) with maximum intensity at a wavelength greater than 700 nm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.