Fluorescent azolyl benzocoumarin dyestuffs
First Claim
Patent Images
1. A fluorescent dyestuff selected from the group consisting of ##STR8## in which R is C1 -C4 -alkyl, or C1 -C4 alkyl substituted by OH, C1 -C4 -alkoxy or phenyl-C1 -C4 -alkoxy, andX is an inorganic or organic acid radical.
0 Assignments
0 Petitions
Accused Products
Abstract
Compounds of the formula ##STR1## wherein A represents N or C-Cl,
and, in the case where A═N, their quaternization products of the formula ##STR2## in which R represents an alkyl, cycloalkyl or aralkyl radical and
X denotes an inorganic or organic acid radical, and it being possible, in the formulae I and II, for the cyclic and acyclic radicals to carry non-chromophoric substituents customary for whiteners,
are suitable for the whitening of organic materials, as scintillators and laser dyestuffs.
29 Citations
4 Claims
-
1. A fluorescent dyestuff selected from the group consisting of ##STR8## in which R is C1 -C4 -alkyl, or C1 -C4 alkyl substituted by OH, C1 -C4 -alkoxy or phenyl-C1 -C4 -alkoxy, and
X is an inorganic or organic acid radical.
Specification