Skin externally used paste

Abstract

Provided is a skin care preparation for external use by solubilizing water soluble ascorbic acid stably. This preparation is obtained by blending a low molecular betaine with a skin care preparation for external use containing water soluble ascorbic acid, a glycol ether or a specific polyhydric alcohol for solubilizing the water soluble ascorbic acid stably. Thereby, it is possible to obtain the preparation blended with the water soluble ascorbic acid in a high concentration stably, and to exhibit various activities that the ascorbic acid originally has, in accordance with its blended amount.Also, it is possible to provide the preparation without having a sticky feeling after the application on the skin and having a moist feeling and a good compatibility to the skin.

Description

technical field [0001] The present invention relates to an external preparation for skin which stably solubilizes ascorbic acid or a salt thereof. Background technique [0002] Ascorbic acid is known to exhibit so-called anti-inflammatory effects, acne-improving effects, whitening effects, anti-aging effects, antioxidant effects, cell activation effects that promote the synthesis of biological components such as collagen, and inhibition of cell damage or DNA damage in epidermal keratinocytes by ultraviolet rays Various effects of the effect, and these effects are expected to be widely used as skin external preparations. However, ascorbic acid is easily oxidized in the presence of water in an aqueous solution, so it is sought to reduce the water in the preparation, but the problem is that a small amount of water cannot sufficiently dissolve ascorbic acid. For this reason, several methods for sufficiently dissolving ascorbic acid in water-based external skin preparations have...

AI Technical Summary

Problems solved by technology

However, there is no insight regarding the solubilization of ascorbic acid

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