Ultraviolet ray absorbing agent

Details Ultraviolet ray absorbing agent Ultraviolet ray absorbing agent

1986-04-28

1988-05-17

Daus, Donald G.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

524 91, 548260, 549335, C07D24920

Patent

active

047451955

ABSTRACT:
An ultraviolet ray absorbing agent comprising as an active ingredient a spiro compound having a spiro ring structure in the molecule, said spiro compound being represented by the general formula ##STR1## wherein, Y is ##STR2## A is ##STR3## R.sub.1 is hydrogen, halogen, lower alkyl of 1 to 4 carbon atoms, lower alkoxyl of 1 to 4 carbon atoms, carboxyl, or sulfo, R.sub.2 is hydrogen or alkyl of 1 to 12 carbon atoms, R.sub.3 and R.sub.4 are alkyls of 1 to 12 carbon atoms, X is methylene, oxygen, imino, sulfur, sulfinyl, or sulfonyl, and n is an integer of 1 to 12.

REFERENCES:
patent: 3766205 (1973-10-01), Heller
patent: 3948946 (1976-04-01), Hofer
patent: 4013619 (1976-03-01), Schmidt
patent: 4414393 (1983-11-01), Dexter
patent: 4511491 (1985-04-01), Ishii
patent: 4530844 (1985-07-01), Smerbeck

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