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Liquid skin-conditioning composition

a technology of liquid skin and composition, applied in the direction of drug compositions, peptide/protein ingredients, hair cosmetics, etc., can solve the problems of stickiness and coarseness, and achieve the effects of suppressing stickiness and coarseness, rich texture, and good use feel

Inactive Publication Date: 2014-08-07
SHISEIDO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The liquid skin-conditioning product described in this patent has the feel of being smooth and dry, with minimal stickiness and coarseness. It also has a rich texture without being slimy, and provides skin softness. This is even while containing tranexamic acids which are known to cause a bit of coarseness.

Problems solved by technology

However, cosmetics, particularly low viscosity cosmetics such as a skin softener, to which tranexamic acids are added, pose a problem of causing stickiness and coarseness from adding tranexamic acids, and Patent Document 3 states that the stickiness and coarseness are suppressed when a predetermined amount of xanthan gum is added.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

[0040]Hereinafter, the present invention is further described in details with reference to specific examples, which do not, however, limit the technical scope of the present invention. The amount in formulae in the following Examples, Comparative Examples, and Formulation Examples are shown in % by mass.

examples 1 to 6

, Comparative Examples 1 to 5

[0041]The liquid compositions (solubilized type) having the composition shown in Tables 1 to 3 below were prepared.

[0042]Subsequently, the actual application test using these compositions was carried out by 20 specialist panelists. Test items include stickiness, freshness, rich texture, skin softness, smooth and dry feel, sliminess, and appearance change (discoloration) over time. Each test item was evaluated by each specialist panelist in accordance with the following evaluation score criteria, and ranked into four levels based on the total of evaluation scores. The appearance change (discoloration) over time was also evaluated in accordance with the following evaluation criteria according to the degree of discoloration. The ranked results are shown together in Tables 1 to 3.

Evaluation Score Criteria (Stickiness, Freshness, Rich Texture, Skin Softness, Smooth and Dry Feel, and Sliminess):

[0043]5 Points: superior

[0044]4 Points: excellent

[0045]3 Points: f...

examples 7 and 8

, Comparative Examples 6 to 8

[0059]The liquid compositions (microemulsion type) having the composition shown in Table 4 below were prepared. The actual application test using these compositions was carried out in the same manner as above, and the compositions were evaluated and ranked based on the same evaluation score criteria. The L value of each composition was also measured using Color-EYE7000 (product of GretagMacbeth GmbH). The results are shown together in Table 4.

TABLE 4ComparativeComparativeComparativeName of raw materialsExample 6Example 7Example 7Example 8Example 8Purified waterBalanceBalanceBalanceBalanceBalanceEthanol44444Glycerin33333Dipropylene glycol55555PEG / PPG-14 / 7 dimethyl ether33333Xanthan gum—0.02———Carboxymethylcellulose——0.020.020.02PEG-30 soy sterol0.150.150.152.52.5Sorbitan sesquiisostearate0.050.050.050.80.8Isostearate0.30.30.358Hydrogenated polydecene0.20.20.234Tranexamic acid22222Citric acidProper quantityProper quantityProper quantityProper quantityPrope...

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Abstract

The present invention provides an external-use liquid skin-conditioning composition that not only reduces the sticky and friction sensations caused by the inclusion of tranexamic acid, but also has a rich body without feeling slimy and softens the skin after use. The composition comprises (A) 0.5 to 5 mass % of at least one hem selected from a group consisting of tranexarnic acid and derivatives thereof and (B) 0.005 to 1.5 mass % of carboxymethylcellulose, has a viscosity of no greater than 500 mPa·s at 30° C., and is transparent or semitransparent with an L value between 50 and 100 inclusive. Preferably the composition contains only carboxymethylcellulose as a thickener.

Description

TECHNICAL FIELD [0001]The present invention relates to a liquid skin-conditioning composition, which contains tranexamic acids, does not cause stickiness or coarseness, and offers a rich texture without sliminess and softness after application.BACKGROUND ART [0002]Tranexamic acids have an antiplasmin action and are added to various cosmetic products as active components for improving rough skin, whitening, and the like. Further, a synergistic effect and a novel effect of a combination of tranexamic acids and other substances are also found, and Patent Document 1, for example, describes a skin-conditioning agent which contains at least two components selected from tranexamic acid, arbutin, trimethylglycine, and vitamin E and prevents the skin dullness caused by various factors.[0003]Also, Patent Document 2 states that, in emulsion cosmetics (creams and milky lotions) to which an oil component is added to provide skin improving effects, an emulsion composition which is stable over an ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K8/41A61Q19/00A61Q19/02A61K8/73
CPCA61K8/41A61Q19/02A61Q19/00A61K8/731A61K8/44A61K2800/262A61K2800/48A61P17/00A61Q19/007
Inventor YASUDA, CHIHIROSUZUKI, KAZUNOBU
Owner SHISEIDO CO LTD
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