Naphthalenemethylenemalonic diesters, and UV absorbers and cosmetic compositions containing the diesters
AssigneeKao Corporation
InventorsMasahide Hoshino, Mitsuru Sugiyama, Akira Kawamata, Hiroko Joukura, Genji Imokawa
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Abstract
The invention relates to UV absorbers and cosmetic compositions containing a naphthalenemethylenemalonic diester represented by the following formula (1): ##STR1## wherein NAP represents a naphthalene group which may optionally have a substituent, and R.sup.1 and R.sup.2 each independently represent a hydrocarbon group, an alkoxyalkyl group, or an alkoxyalkylenoxyalkyl group. The UV absorbers and the cosmetic compositions of the invention exhibit excellent ultraviolet ray absorbing action, and are stable to light.
Claims15
An ultraviolet ray absorber comprising a naphthalenemethylenemalonic diester represented by the following formula (1):
- ##STR22## wherein NAP represents a naphthalene group which may optionally have a substituent, and R.sup.1 and R.sup.2 each independently represent an alkoxyalkyl group, or an alkoxyalkylenoxyalkyl group.
An ultraviolet ray absorber, comprising a naphthalenemethylenemalonic diester represented by the following formula (5):
- ##STR26## wherein R.sup.1 and R.sup.2, each independently represent a hydrocarbon group, an alkoxyalky group, or an alkoxyalkyleneoxyalkyl group.
A cosmetic composition comprising 0.1 to 20 wt. % of a naphthalenemethylenemalonic diester represented by the following formula (1):
- ##STR28## wherein NAP represents a naphthalene group which may optionally have a substituent, and R.sup.1 and R.sup.2 each independently represent a hydrocarbon group, an alkoxyalkyl group, or an alkoxyalkylenoxyalkyl group, and a carrier.
A cosmetic composition, comprising a naphthalenemethylenemalonic diester represented by the following formula (5):
- ##STR32## wherein R.sup.1 and R.sup.2 independently represent a hydrocarbon group, an alkoxyalkyl group, or an alkoxyalkyleneoxalkyl group.
A naphthalenemethylenemalonic diester represented by the following formula (2):
- ##STR34## wherein NAP represents a naphthalene group which may optionally have a substituent, and R.sup.1a and R.sup.2a each independently represent a C7-C20 hydrocarbon group, a (C1-C12)alkoxy-(C1-C20)alkyl group, or a (C1-C12)alkoxy-(C1-C5)alkylenoxy-(C1-C20)alkyl group.
A naphthalenemethylenemalonic diester represented by the following formula (6):
- ##STR35## wherein R.sup.3a represents a hydrocarbon atom, a C1-C20 alkoxy group or a hydroxy group, R.sup.4a represents a hydrogen atom, a C1-C20 alkoxy group, and R.sup.1a and R.sup.2a each independently represent a C7-C20 hydrocarbon group, a (C1-C12)alkoxy-(C1-C20)alkyl group, or a (C1-C20)alkoxy-(C1-C5)alkylenoxy-(C1-C20)alkyl group.
A naphthalenemethylenemalonic diester represented by the following formula (3):
- ##STR36## wherein R.sup.1b and R.sup.2b each independently represent a C1-C20 hydrocarbon group.
Dependencies are inferred from the claim text.