Disazo dyes, preparation and use
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United States of America Patent
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Sep 16, 2014
Grant Date -
Dec 19, 2013
app pub date -
Dec 17, 2011
filing date -
Dec 24, 2010
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Abstract
Described are dyes of formula (I) where R1 is hydrogen, alkyl, alkoxy, trifluoromethyl or halogen, M is hydrogen, an alkali metal cation or an optionally substituted ammonium cation, R2 and R3 are each independently hydrogen, alkyl or alkoxy, R4 is alkyl or alkoxy, R5 and R6 are each independently moieties of the formula —(CmH2m)—O—CnH2n+1, m is an integer from 3 to 6, and n is an integer from 0 to 8. These dyes are useful for dyeing and printing materials having polar groups.
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