Polymeric azo compounds containing at least four cationic groups
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United States of America Patent
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Jun 23, 1987
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N/A
app pub date -
Nov 13, 1984
filing date -
Nov 11, 1982
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Abstract
Polymers comprising two the more recurring units of formula ##STR1## wherein A.sub.1 is an aromatic bridging group each K.sub.1 is independently the radical of a coupling component, E is an aliphatic, aromatic or aromatic heterocyclic bridging radical, each R.sub.1 and R.sub.2 is independently C.sub.1-4 alkyl substituted C.sub.1-4 alkyl, C.sub.3-6 alkenyl or substituted C.sub.3-6 alkenyl or both R.sub.1 's together with the nitrogen atom to which they are attached and/or both R.sub.2 3 s together with the nitrogen atom to which they are attached form a morpholinium, piperidinium or pyrrolidinium group, and each A.sup..crclbar. is independently a non-chromophoric anion, are useful as dyes, particularly for dyeing paper and leather.
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