Patent ID: 6239263
Filing Date: 2001-05-29
Classification: C09B

Abstract:
A water-soluble azo compound represented by the general formula (I): ##STR17##wherein, Y is --OM, --OR.sub.1, or --NH-X, and Y' is --OM', --OR.sub.1 ', or --NH-X',(in which M and M' each represent a hydrogen atom or an alkali metal;R.sub.1 and R.sub.1 ' each represent a group selected from an optionally branched saturated or unsaturated aliphatic hydrocarbon group having 1 to 6 carbon atoms, an optionally substituted cycloalkyl group having 3 to 6 carbon atoms, and an optionally substituted aromatic group; andX and X' each represent an optionally substituted aromatic group or an optionally substituted heterocyclic group having conjugated double bonds;provided that at least one of Y and Y' represents --OM or --OM';)A is a group represented by formula (IV) ##STR18##(in which B and B' represent a group selected from a group consisting of --SO.sub.2 --, --CO--, --NHSO.sub.2 -- and --NHCO--; andQ and Q' represent a group binding an ethyl group at .beta.-position and capable of forming a vinyl group by alkaline decomposition,m represents an integer 1 or 2, and n represents an integer 1 to 3).