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Oil-in-water emulsion composition

An emulsified composition, oil-in-water type technology, applied in the direction of cosmetics, cosmetic preparations, dressing preparations, etc., can solve the problems of precipitation, insolubility, loss of touch, etc., to improve stability and UV protection ability , Excellent UV protection effect

Active Publication Date: 2013-01-02
SHISEIDO CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, most oil-soluble UV absorbers are poorly soluble, and a large amount of high-polarity oil must be blended in order to dissolve them. This may result in loss of moist touch unique to oil-in-water emulsions, or the occurrence of UV absorbers at low temperatures. In the case of stability problems such as precipitation in the oil phase
[0005] Patent Document 1 describes that the oil solubility can be improved by enclosing a poorly soluble ultraviolet absorber in spherical polymer particles made of styrene to form a spherical powder, so that it can be highly blended into the oil phase. water-in-oil emulsified cosmetics or solid cosmetics, which are not blended into the water phase (external phase) of oil-in-water emulsions

Method used

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  • Oil-in-water emulsion composition
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  • Oil-in-water emulsion composition

Examples

Experimental program
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Embodiment

[0061] Hereinafter, specific examples will be given to describe the present invention in more detail, but the present invention is not limited to the following examples. In addition, unless otherwise specified, the compounding quantity in the following Examples etc. shows mass %.

[0062] (Example and Comparative Example)

[0063] An oil-in-water emulsion composition having a composition shown in Table 1 below was prepared. Specifically, the water phase components and the oil phase components were heated to 70° C. to completely dissolve them, and then the oil phase was added to the water phase and emulsified with an emulsifier to obtain the compositions of the respective examples.

[0064] Sample 18.87 μL of each composition of Example 1 and Comparative Example 1 was mixed with 0.75 mg / cm 2 The ratio of is uniformly coated on the surface of a film (5 cm x 5 cm) made of PMMA. After standing for 15 minutes, the absorbance of each sample was measured using a spectrophotometer ...

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Abstract

Disclosed is an oil-in-water (O / W) emulsion composition which contains an oil-soluble ultraviolet absorber having low solubility, and which exhibits superior stability. The O / W emulsion composition is characterised by containing: (a) an aqueous dispersion of an oil-soluble ultraviolet absorber; (b) a compound of a non-ionic surfactant and at least one type of fatty acid soap; (c) a water-swelling clay mineral; and (d) a higher fatty acid. Component (a) is preferably an aqueous dispersion of a complex particle of an oil-soluble ultraviolet absorber and an organic polymer.

Description

technical field [0001] The present invention relates to an oil-in-water emulsified composition, and more specifically, to an oil-in-water emulsified composition having an oil-soluble ultraviolet absorber blended in an external phase (aqueous phase) and having a stable and high ultraviolet protection ability. Background technique [0002] The purpose of sunscreen cosmetics is to block the ultraviolet rays in the sun's rays and protect the skin from the adverse effects of ultraviolet rays. As the base, emulsified type, lotion type, oil type, etc. can be mentioned. Among them, the oil-in-water type emulsified type can be formulated from low SPF (sun protection factor) to high SPF products because of its moist touch. And it is widely used (Non-Patent Document 1). [0003] On the other hand, the UV absorbers blended into sunscreen cosmetics include oil-soluble UV absorbers and water-soluble UV absorbers, which are obtained to absorb ultraviolet rays in the UVA region (wavelength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/25A61K8/06A61K8/36A61K8/49A61K8/86A61Q17/04
CPCA61K8/062A61K8/361A61K8/26A61K8/4966A61Q17/04A61K8/86A61K8/49A61K8/36A61K8/25
Inventor 永礼由布子山口和弘
Owner SHISEIDO CO LTD