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Oil-in-water type emulsion sunscreen cosmetic

A cosmetic and hydrophobization technology, which is applied in the field of oil-in-water emulsified sunscreen cosmetics, can solve the problems of difficulty in maintaining emulsification stability and feeling of use, achieve high SPF and improve the effect of feeling of use

Pending Publication Date: 2022-07-15
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, it is difficult to maintain emulsification stability and usability when more UV-scattering agents are incorporated in order to achieve high SPF with UV-scattering agents.

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

[0077] Hereinafter, the present invention will be described in more detail with reference to specific examples, but the present invention is not limited by these examples at all. In addition, the compounding quantity represents mass %, unless otherwise stated.

[0078] Oil-in-water emulsion cosmetic products were prepared by conventional methods according to the formulations shown in Tables 1 to 3 below, and their properties were evaluated according to the following evaluation methods and evaluation criteria. These results are summarized in the table.

[0079] 1. Emulsion stability: dispersibility of hydrophobized UV scattering agent

[0080] Evaluation was performed by visually observing the state of the prepared sample and by visually observing the state after the sample was filled in a screw tube for 2 weeks.

[0081]

[0082] A: Stable emulsification was possible, and separation and aggregation over time were not observed.

[0083] B: Stable emulsification was possibl...

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PUM

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Abstract

Provided is an oil-in-water type emulsion sunscreen cosmetic which is capable of achieving a high SPF by incorporating a large amount of a hydrophobized ultraviolet scattering agent into an oil phase, while having excellent emulsion stability and feeling of use. This cosmetic is characterized by containing (A) 0.05-1% by mass of a water-soluble alkyl-substituted polysaccharide derivative, (B) a hydrophobized ultraviolet scattering agent, and (C) an ionic surfactant, the (B) hydrophobized ultraviolet scattering agent being dispersed in an oil phase.

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 containing a hydrophobized ultraviolet scattering agent, which maintains the moist feeling in use peculiar to oil-in-water emulsions and can be used as an inner phase (oil phase). An oil-in-water emulsified sunscreen cosmetic that contains a large amount of UV-scattering agents. Background technique [0002] An oil-in-water emulsified sunscreen cosmetic in which a UV-scattering agent is dispersed in an inner phase (oil phase) is useful as a formulation system that can achieve both a moisturizing feel and a UV-shielding effect. "SPF") and it is necessary to increase the amount of the surfactant as an emulsifier in some cases when more ultraviolet scattering agents are to be blended. When the compounding quantity of surfactant increases, stickiness may arise, and various countermeasures have been...

Claims

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Application Information

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IPC IPC(8): A61K8/73A61K8/06A61K8/29A61K8/44A61Q17/04
CPCA61K8/73A61K8/44A61K8/06A61Q17/04A61K8/29
Inventor 镰田纱希西田圭太
Owner SHISEIDO CO LTD
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