Compositions – Light transmission modifying compositions – Ultraviolet
Patent
1994-02-22
1996-03-12
Tucker, Philip
Compositions
Light transmission modifying compositions
Ultraviolet
8442, 8573, 8607, F21V 904, D06P 502
Patent
active
054983452
ABSTRACT:
Aqueous stable dispersions of a mixture of sparingly soluble UV absorbers, which comprises
(a) 5 to 50% by weight of a mixture of a benzotriazole of formula ##STR1## and a 2-hydroxybenzophenone of formula ##STR2## wherein R is halogen, C.sub.1 -C.sub.12 alkyl, lower alkoxy, lower alkoxycarbonyl, cycloalkyl, aryl, C.sub.1 -C.sub.12 alkylaryl or aralkyl, and the rings A and B, each independently of the other, may be further substituted by halogen, hydroxy, lower alkyl, lower alkoxy or lower alkoxycarbonyl,
REFERENCES:
patent: 3004896 (1961-10-01), Heller
patent: 3931072 (1976-01-01), Coyle
patent: 4202838 (1980-05-01), Lauton
patent: 4386037 (1983-05-01), Baumann
patent: 4557730 (1985-12-01), Bennett
patent: 4895981 (1990-01-01), Reinert et al.
patent: 5009669 (1991-04-01), Jollenbeck
Jollenbeck Martin
Neukom Alfred J.
Ciba-Geigy Corporation
Mansfield Kevin T.
Tucker Philip
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