| 摘要 |
Polymers comprising two the more recurring units of formula <IMAGE> wherein A1 is an aromatic bridging group each K1 is independently the radical of a coupling component, E is an aliphatic, aromatic or aromatic heterocyclic bridging radical, each R1 and R2 is independently C1-4alkyl substituted C1-4alkyl, C3-6alkenyl or substituted C3-6alkenyl or both R1's together with the nitrogen atom to which they are attached and/or both R23 s together with the nitrogen atom to which they are attached form a morpholinium, piperidinium or pyrrolidinium group, and each A(-) is independently a non-chromophoric anion, are useful as dyes, particularly for dyeing paper and leather.
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