Patent ID: 6045593
Filing Date: 2000-04-04
Classification: C09B,Y10S

Abstract:
A dye of the formula: ##STR17## wherein: M.sup.+ is Na.sup.+, Li.sup.+, K.sup.+, NH.sub.4.sup.+, or hydroxyalkylammonium of the formula [H--(OCH.sub.2 CH.sub.2).sub.n ].sub.p NH.sub.m, where n is 1 to 5, p is 1 to 3, and p+m is 4;R.sub.1 is hydrogen, a metal ion, an alkyl of C.sub.1-4, or hydroxyalkyl of C.sub.1-4, and combinations thereof; andR.sub.2 is a phenyl group substituted with at least one member selected from the group consisting of: alkyl; alkoxy; hydroxyalkoxy; halogen; hydroxyl; C.sub.2 -C.sub.6 acylamino, perfluoroalkyl, substituted or unsubstituted benzoylamino;HO.sub.3 SOCH.sub.2 CH.sub.2 SO.sub.2.sup.- ; vinyl sulfone or moiety that can undergo elimination to form the vinyl sulfone structure; amino substituted with an alkyl of C.sub.1-4, a dialkyl of C.sub.1 -C.sub.4, substituted or unsubstituted phenyl, diphenyl, or combinations thereof; and combinations thereof.