摘要 |
<p>A water soluble disazo colorant represented by formula (I) in the form of free acid: <CHEM> wherein K represents <CHEM> [wherein A represents a methyl group or a carboxylic group; R<2> represents a hydrogen atom, an alkyl group of l to 8 carbon atoms, a sulfoalkyl group of l to 4 carbon atoms, or an alkyl group of l to 4 carbon atoms which is substituted by an alkoxy group of l to 4 carbon atoms; R<3> represents a hydrogen atom, a halogen atom, a cyano group, a -CONH2 group, a carboxyl group, a sulfonic group, or a sulfomethyl group, p represents an integer of l or 2]; Z represents a fluorine atom or <CHEM> [wherein R<4> represents a hydrogen atom or an alkyl group of l to 4 carbon atoms; R<5> and R<6> each represents independently a hydrogen atom, an alkyl group of l to 4 carbon atoms, an alkoxy group of l to 4 carbon atoms, a sulfonic group, or a halogen atom; Y represents -SO2CH=CH2 or -SO2CH2CH2W (wherein W represents a group which is released by the action of an alkali)]; R<1> represents a hydrogen atom or a lower alkyl group of l to 4 carbon atoms; Q represents a divalent aromatic or aliphatic residual group; and l , m, and n each represents an integer of 0 or l.</p> |