Phenyl-benzimidazolyl-furanes for optical brightening of organic

Details Phenyl-benzimidazolyl-furanes for optical brightening of organic Phenyl-benzimidazolyl-furanes for optical brightening of organic

1979-07-02

1981-04-28

Clingman, A. Lionel

Bleaching and dyeing; fluid treatment and chemical modification

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

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

8539, 8921, 8922, 8924, 8927, 25230121, 25230132, 548327, C07D40504

Patent

active

042643252

ABSTRACT:
2-Phenyl-5-benzimidazol-2'-yl-furanes of the formula ##STR1## in which R.sub.1 to R.sub.6 are as defined in the specification, n is the number 0 or 1 and A.crclbar. is a colorless anion equivalent to the cation of the fluorescent brightener, their preparation as well as their use for optically brightening organic materials are disclosed.

REFERENCES:
patent: 3497525 (1970-02-01), Harnisch et al.
patent: 3637734 (1972-01-01), Harnisch et al.
patent: 4018789 (1977-04-01), Littlewood et al.
patent: 4189589 (1980-02-01), Meyer et al.

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