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US 4,889,947 AGranted
Ultraviolet radiation absorbing naphthalenylidene compositions
AssigneeICI Americas Inc.
InventorsCharalambos J. Phalangas, Thomas P. Cleary
Life of this patent
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Abstract
Sunscreen compositions are described which contain certain substituted naphthalenylidenes which act as UV filters when incorporated in a carrier in amounts ranging from 0.1-50% by weight.
Claims4
A compound of the formula:
- ##STR2## wherein:
- X and Y are independently selected from --H, --CN, --COOR.sup.12, --CONHR.sup.12, --CON(R.sup.12).sub.2, --PhCOOR.sup.12, --PhCOR.sup.12, --PhOR.sup.12, --PhN(R.sup.12).sub.2, [or wherein only one X or Y is substituted by --H,] provided that only one of X and Y can be --H;
- and
- R.sup.1 -R.sup.11 are selected from H, --OH, --COOR.sup.12, alkyl, alkoxy, or hydroxyalkyl groups having 1-5 carbon atoms and R.sup.12 is selected from H, alkyl, alkylaryl or arylalkyl groups of 1-22 carbon atoms, and Ph is a benzene ring;
- and
- wherein one of a and b is a double bond and the other is a single bond.
3 more elements
Dependencies are inferred from the claim text.