UV absorbers, their preparation and use

Details UV absorbers, their preparation and use UV absorbers, their preparation and use

1997-03-10

1998-07-28

Gupta, Yogendra N.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

544209, C07D25154

Patent

active

057864764

ABSTRACT:
The invention relates to compounds of formula ##STR1## wherein the variables are as claimed in the claims. The compounds are suitable as UV absorbers for the photochemical stabilisation of undyed or dyed cellulosic fibre materials for enhancing their sun protection factor.

REFERENCES:
patent: 3041330 (1962-06-01), Coleman et al.
patent: 5098445 (1992-03-01), Hung et al.
patent: 5274083 (1993-12-01), Herd et al.
patent: 5340928 (1994-08-01), Hoppe et al.

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