Aqueous dye preparations containing coumarin dyes

Details Aqueous dye preparations containing coumarin dyes Aqueous dye preparations containing coumarin dyes

1995-03-06

1996-07-02

Einsmann, Margaret

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Fluorescent dye, e.g., stilbene, benzimidazole, benzoxazole,...

8692, 8919, 544287, D06P 360, D06P 140, C09B 702

Patent

active

055317979

ABSTRACT:
Aqueous dye preparations contain from 12 to 30% by weight, based on the weight of the preparation and calculated as free acid, of a dye of the formula ##STR1## where L.sup.1 and L.sup.2 are each C.sub.1 -C.sub.4 -alkyl and Cat.sup..sym. is an alkali metal ion or an unsubstituted or substituted ammonium ion, and are used for coloring paper stocks.

REFERENCES:
patent: 2926116 (1960-02-01), Kein
patent: 3617210 (1971-11-01), Dehnert

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