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O/W emulsion composition

An emulsified composition, high-quality technology, applied in chemical/physical processes, cosmetics, cosmetic preparations, etc., can solve the problems of phenol particle coarsening, precipitation inhibition, etc., and achieve excellent use feeling and formulation stability Effect

Active Publication Date: 2014-02-26
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] However, no studies have been conducted on the coarsening of methylenebisbenzotriazolyltetramethylbutylphenol particles and the inhibition of precipitation when octocrylene is blended.

Method used

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  • O/W emulsion composition
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Experimental program
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Effect test

Embodiment

[0098] Although specific examples are given below and this invention is further demonstrated, this invention is not limited to these. Unless otherwise specified, the compounding quantity means mass %. In addition, the evaluation method used in this invention is as follows.

[0099] (average emulsified particle size)

[0100] The particle size distribution of the emulsified particles immediately after preparation of the O / W emulsified composition was measured using Zetasizer Nano ZS (Sysmex Corporation).

[0101] (sense of use)

[0102] 20 female test subjects applied the test sample immediately after preparation to the face by hand, investigated the sticky feeling during application, and evaluated according to the following criteria.

[0103] ◯: 16 or more test subjects answered that there was no stickiness.

[0104] Δ: 6 to 15 test subjects answered that there was no stickiness.

[0105] ×: Five or less test subjects answered that there was no stickiness.

[0106] (emul...

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Abstract

The present invention provides an O / W emulsified composition which contains an organic UV absorber in an oil state such as octocrylene and a solid organic UV absorber, and is excellent in UV protection ability, formulation stability, and feeling in use. The composition according to the present invention is an O / W emulsified composition, comprising: (a) an organic UV absorber in an oil state at 20°C, comprising (a1) octocrylene; (b) an organic UV absorber in a solid state at 20°C, selected from (b1) bis-ethylhexyloxyphenol methoxyphenyl triazine and (b2) methylene bis-benzotriazolyl tetramethylbutylphenol; and (c) a polyoxyethylene / polyoxyalkylene alkyl ether block polymer represented by formula (1) or (2): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 1 O-(PO)m-(EO)n-H€ƒ€ƒ€ƒ€ƒ€ƒ(1) wherein R 1 is a hydrocarbon group having 16 to 18 carbon atoms; PO is an oxypropylene group, EO is an oxyethylene group, and PO and EO are added to each other in block form; and m and n respectively represent average addition mole number of PO and EO, 70>m>4, 70>n>10, and n>m; €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒR 2 O-(AO)p-(EO)q-R 3 €ƒ€ƒ€ƒ€ƒ€ƒ(2) wherein R 2 and R 3 are either identical to or different from each other, and each of them is a hydrocarbon group having 1 to 4 carbon atoms; AO is an oxyalkylene group having 3 to 4 carbon atoms, EO is an oxyethylene group, and AO and EO are added to each other in block form; and p and q respectively represent average addition mole number of AO and EO, 1‰¤p‰¤70, 1 ‰¤q‰¤70, and 0.2<(q / (p + q))<0.8, and wherein average particle size of the oil phase comprising the component (a) is 700 nm or less.

Description

[0001] related application [0002] This application claims the priority of Japanese Patent Application Nos. 2008-282274 and 2008-282275 filed on October 31, 2008, the contents of which are incorporated herein. technical field [0003] The invention relates to an oil-in-water (O / W) emulsified composition, in particular to an oil-like, oil-soluble organic ultraviolet absorber at normal temperature and a solid organic ultraviolet absorber at normal temperature, the stability of the preparation and the feeling of use Excellent, suitable as an O / W emulsified composition for sunscreen cosmetics. Background technique [0004] In recent years, the influence of ultraviolet rays on the skin has been widely known. In addition, users' awareness of whitening has increased, and cosmetics with higher ultraviolet protection capabilities and good usability are required. [0005] O / W emulsified composition contains oil, but it can give a moist and refreshing feeling, so it is self-evident t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61K8/86A61K8/06A61K8/37A61K8/40A61K8/49A61Q17/04C09K23/42C09K23/52
CPCA61K8/062A61K8/496A61K8/4966A61Q17/04A61K8/40A61K8/068A61K8/86A61K8/06A61K8/37
Inventor 高仓登美子黑泽卓文矢岛勋藤山希
Owner SHISEIDO CO LTD
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