Whitening agent containing crystalline molecular complex of hydroquinone and surfactant
OwnerYuji Ohashi, Nahoko Iimurainventors
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Abstract
There are provided a hydroquinone-containing whitening agent having high storage stability and sustained release of hydroquinone, a process for production of the whitening agent, and a whitening method for skin which employs the whitening agent. The whitening agent of the invention comprises a crystalline molecular complex composed of hydroquinone or a derivative thereof and a surfactant, wherein formation of the molecular complex improves the storage stability of the hydroquinone-containing whitening agent against heat, oxygen and light, while the hydroquinone is gradually released for a sustained whitening effect of the whitening agent.
Claims22
A whitening agent comprising a crystalline molecular complex composed of hydroquinone or a derivative thereof and a surfactant, characterized in that formation of said molecular complex improves the storage stability of the hydroquinone-containing whitening agent against heat, oxygen and light, while said hydroquinone is gradually released for a sustained whitening effect of said whitening agent.
The use of a crystalline molecular complex composed of hydroquinone or a derivative thereof and a surfactant for production of a whitening agent, characterized in that formation of said molecular complex improves the storage stability of the hydroquinonecontaining whitening agent against heat, oxygen and light, while said hydroquinone is gradually released for a sustained whitening effect of said whitening agent.
A whitening method for skin wherein a whitening agent comprising a crystalline molecular complex composed of hydroquinone or a derivative thereof and a surfactant is applied to pigmented skin, the method being characterized in that formation of said molecular complex improves the storage stability of the hydroquinonecontaining whitening agent against heat, oxygen and light, while said hydroquinone is gradually released for a sustained whitening effect of said whitening agent.
Dependencies are inferred from the claim text.