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Oil-in-water type emulsion sunscreen cosmetic

A technology for oil-in-water type cosmetics, applied in the direction of cosmetics, cosmetic preparations, dressing preparations, etc., can solve problems such as difficulties, achieve the effects of maintaining emulsion stability, excellent emulsion stability, and improving UV protection

Pending Publication Date: 2022-08-02
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, for oil-in-water type sunscreen cosmetics, it is also difficult to stably mix the UV protection agent into the oil layer as the inner layer.

Method used

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  • Oil-in-water type emulsion sunscreen cosmetic
  • Oil-in-water type emulsion sunscreen cosmetic
  • Oil-in-water type emulsion sunscreen cosmetic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] Hereinafter, the present invention will be described in more detail by way of Examples, but the present invention is not limited by them at all. Unless otherwise stated, the compounding amount is expressed in mass % with respect to the system in which the component is compounded. Before the specific description of each Example, the adopted evaluation method will be described.

[0079]

[0080]On the assay plate (S plate) (5×5cm V-groove PMMA plate, SPFMASTER-PA01) at 2 mg / cm 2 Cosmetics (samples) of each example were added dropwise in an amount of 100%, applied with a finger for 60 seconds and dried for 15 minutes. The absorbance of the formed coating film was measured with a U-3500 self-recording spectrophotometer manufactured by Hitachi, Ltd. Using an uncoated plate as a control, the absorbance (Abs) was calculated by the following formula, and the measured values ​​at 280 nm to 400 nm were integrated to obtain an integrated absorbance value.

[0081] Abs=-log(T / T...

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PUM

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Abstract

The purpose of the present invention is to provide an oil-in-water type emulsion sunscreen cosmetic which has excellent emulsion stability and which can achieve a high ultraviolet-ray-resistant ability by improving the ultraviolet-ray-resistant ability of an ultraviolet-ray scattering agent. The sunscreen cosmetic according to the present invention is characterized by containing (A) an acrylic copolymer having a phosphate group, (B) a hydrophobized ultraviolet scattering agent, and (C) 0.3% by mass or more of an aqueous phase thickener, the ultraviolet scattering agent being dispersed in an oil layer.

Description

technical field [0001] The present invention relates to an oil-in-water emulsified sunscreen cosmetic. More specifically, it relates to an oil-in-water emulsified sunscreen cosmetic which can achieve a high ultraviolet protection power by combining a specific polymer compound and an ultraviolet scattering agent in combination. Background technique [0002] Oil-in-water cosmetics are widely used as bases for skin external preparations such as skin cosmetics that are directly applied to the skin because they provide a refreshing and delicate touch when applied to the skin. Among them, for skin care and body care, protect the skin from ultraviolet rays on a daily basis. Among such sunscreen cosmetics, the importance of sunscreen cosmetics in which oil-in-water type cosmetics are used as a base is increasing. [0003] As an ultraviolet ray defense agent compounded in a sunscreen cosmetic, an ultraviolet absorber and an ultraviolet ray scattering agent generally exist. There a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/06A61Q17/04A61K8/81
CPCA61Q17/04A61K8/062A61K2800/48A61K2800/594A61K8/25A61K8/8152A61K2800/621A61K8/8147A61K8/8158
Inventor 榎本步西田圭太
Owner SHISEIDO CO LTD
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