| 摘要 |
<p>Cationic azo dyes of formula (1) wherein R represents a substituted or unsubstituted alkyl radical, each of R1 and R2 represents hydrogen or a substituted or unsubstituted alkyl or aryl radical, X ? is the charge equivalent of an anion, and wherein the benzene ring A and the pyridine ring B are unsubstituted or substituted , non-ionogenic substituents, and wherein the cationic component does not contain any groups which exhibit acid dissociation in water.</p> |
