Photobleach system, composition and process

Details Photobleach system, composition and process Photobleach system, composition and process

D - Textiles, Paper

06

L

8/76

D06L 3/04 (2006.01) C11D 3/00 (2006.01) C11D 3/395 (2006.01)

Patent

CA 1202452

Abstract of the disclosure A photobleach system is disclosed comprising a syner- gistic mixture of an electron donor and a visible/ultra- violet radiation absorbing compound (a chromophore ac- ceptor) 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 naphtalo- cyanines.

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