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US 5,844,101 AGranted
Light-fast disazo dyestuffs
AssigneeBayer Aktiengesellschaft
InventorKlaus Kunde
Life of this patent
Estimating the term…
Abstract
The novel dyestuffs of the formula (I) ##STR1## in which the substituents R and X have the meaning given in the description, are outstandingly suitable for dyeing cellulosic materials in blue color shades which are particularly fast to light.
Claims10
A dyestuff of the formula (I)
- in which
- the sulfo group is bonded in the 6- or 7-position,
- R represents benzoyl or naphthoyl, in each case optionally substituted once to three times in an identical or different manner by C.sub.1 -C.sub.4 -alkyl, C.sub.1 -C.sub.4 -alkoxy, F, Cl, Br, COOH, SO.sub.3 H or NO.sub.2, or represents 1,3,5-triazinyl which is substituted in positions 4 and 6 in an identical or different manner by OH, NH.sub.2, NHC.sub.2 H.sub.4 OH, N(CH.sub.3)C.sub.2 H.sub.4 OH, N(C.sub.2 H.sub.4 OH).sub.2 ##STR15## and X represents SO.sub.3 H or COOH.
Dependencies are inferred from the claim text.