JPH10265336A - Pack cosmetic - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a pack cosmetic capable of providing beautiful pearl gloss and excellent in stability with the passage of time by combining and compounding pearl pigment with two kinds of specific compounds. SOLUTION: This pack cosmetic comprises pearl pigment, xanthan gum and polyvinyl alcohol. The xanthan gum is preferably compounded in an amount of 0.02-2 wt.% and the polyvinyl alcohol is preferably compounded in an amount of 7-20 wt.%. Mica titanium, bismuth oxychloride, argentine, etc., especially preferably mica titanium is used as the pearl pigment. The pearl pigment is compounded in an amount of 0.005-5 wt.%. The cosmetic does not cause precipitation of pearl pigment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pack cosmetic, and more particularly, to a pack cosmetic having a pearly appearance and excellent stability over time.

[0002]

2. Description of the Related Art Among the cosmetics, so-called peel-off type packs which are applied to the skin, left for a certain period of time, and then peeled off, are roughly classified into two types: transparent jelly type and opaque paste type. is there. Of these, the transparent jelly-form type has the advantage that it is not noticeable even when applied to the face, but has the disadvantage that it is transparent and does not give a sense of quality. Therefore, a method has been devised in which an appropriate amount of pearl pigment is blended with the transparent jelly-like type pack cosmetic to give a beautiful pearly appearance to give a sense of quality. However, since synthetic mica titanium, which is often used as a pearl pigment, has a large specific gravity, it has a drawback in stability that it sediments and collects on the bottom in the base of a pack cosmetic over time. In order to prevent this sedimentation, the sedimentation speed can be slowed by reducing the particle size of the pearl pigment, but there is a problem that if the particle size is small, a beautiful pearl-like appearance cannot be obtained.
Further, it is possible to slow down the sedimentation by using a pearl pigment obtained from a natural fish scale foil having a small specific gravity, but it cannot be said that sufficient stability can be obtained. In addition, increasing the product viscosity is not preferable in terms of usability, such as increasing the spread of the product when applied to the skin.

[0003]

In view of the above situation, the present inventors have conducted intensive studies to obtain a pack cosmetic which has a beautiful pearl luster and excellent stability over time. The inventor has found that by combining a pigment with xanthan gum and polyvinyl alcohol, a pack cosmetic excellent in both pearl luster and stability in appearance can be obtained, thereby completing the present invention.

[0004]

That is, the present invention according to claim 1 is a pack cosmetic comprising a pearl pigment, xanthan gum and polyvinyl alcohol. In the invention according to claim 2, xanthan gum is contained in 0.1 g.
The pack cosmetic according to claim 1, which contains from 02 to 2% by weight. The invention according to claim 3 is the pack cosmetic according to claim 1 or 2, which contains 7 to 20% by weight of polyvinyl alcohol. The invention according to claim 4 is the pack cosmetic according to any one of claims 1 to 3, wherein the pearl pigment is synthetic mica titanium.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail. Unless otherwise specified,% of the blending amount represents% by weight. The pearl pigment used in the present invention refers to a pearlescent or iris color, a powdery pigment having an effect of giving a metallic feeling, and generally, titanium mica, bismuth oxychloride, fish scale foil and the like are used. ing. The most frequently used of these is titanium mica, which is made of mica in the form of smooth flaky particles, the surface of which is coated with a layer of titanium dioxide. Some of them are coated with iron oxide instead of titanium dioxide, and others are coated with a transparent pigment on a coating layer of titanium oxide to give different colors, and these can also be used. In the present invention,
These pearl pigments are blended in an amount of 0.005 to 5%, more preferably 0.01 to 1%. The blending amount is 0.
If the amount is less than 005%, a sufficient pearl-like appearance cannot be obtained, and if the amount exceeds 5%, problems such as insufficient formation of a film occur. In any case, satisfactory results cannot be obtained.

The xanthan gum used in the present invention is a natural gum obtained by fermenting carbohydrates using Xanthomonas spp. And purifying polysaccharides accumulated outside the cells.
Commercial products include Echo Gum (Gokyo Sangyo) and Celtrol (Koei Kogyo). The amount of the xanthan gum is 0.02 to 2%, more preferably 0.1 to 1%.
Range. If the compounding amount is less than 0.02%, a sufficient effect of preventing sedimentation of the pearl pigment cannot be obtained, and if the compounding amount is 2% or more, the viscosity becomes too high, and the spread of the pack becomes poor when applied. Occurs, and in each case, satisfactory results cannot be obtained.

The polyvinyl alcohol used in the present invention is
It is obtained by hydrolyzing polyvinyl acetate and is a linear polymer of vinyl alcohol. There are completely saponified products and partially saponified products. Commercial products include Denka Poval (Electrochemical), Kuraray Poval (Kuraray), Shin-Etsu Poval (Shin-Etsu Chemical), Gohsenol (Nippon Synthetic Chemical). The blending amount of polyvinyl alcohol is in the range of 7 to 20%, preferably 10 to 15%. If the amount is less than 7%, a film having sufficient strength is not formed, and the viscosity at the time of applying the pack is low, so that a satisfactory feeling of use as a pack cosmetic cannot be obtained. In any case, satisfactory results cannot be obtained, for example, because the viscosity is too high and application is difficult.

In the pack cosmetic according to the present invention, in addition to the above-mentioned essential components, if necessary, components generally incorporated in cosmetics can be added. Such components include lower alcohols such as ethanol and isopropyl alcohol, polyhydric alcohols such as glycerin, propylene glycol, dipropylene glycol, 1,3-butanediol, sorbitol and maltitol, liquid paraffin, higher alcohols and ester oils. , Oils such as methylpolysiloxane, talc, kaolin, titanium oxide, powders such as silicic anhydride, polyvinylpyrrolidone, polyvinyl acetate, water-soluble polymers such as carboxymethylcellulose, anionic surfactants, amphoteric surfactants, Nonionic surfactants, preservatives, bactericides, UV absorbers, chelating agents,
Antioxidants, fragrances and the like.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited to these examples. Prior to the examples, the evaluation method used in each example will be described.

[Test for Sedimentation Prevention Effect of Pearl Agents] The test for sedimentation prevention effects of pearl agents was carried out by the following method. Capacity 50ml
Glass cylindrical container (height approx. 65mm, inside diameter approx. 32m)
to m), a sample of the pack cosmetics containing pearl pigments placed 50 g, and sealed with a screw cap 50 ^O C
Was allowed to stand under the following conditions. The appearance state after one month was observed and evaluated based on the following criteria. ：: pearl pigment is uniformly dispersed throughout the sample, and there is no change in appearance. ：: a slight supernatant portion is formed at the top of the sample, but pearl pigment is uniformly dispersed over almost the whole. ×: sedimentation of pearl pigment Is observed, a layer is formed on the bottom of the sample, and the dispersion of the pearl pigment is uneven throughout.

[Evaluation of usability] The usability of the pack cosmetic is as follows.
A professional panel actually applied the sample to the face and evaluated according to the following criteria. ：: Uniform coating can be applied evenly, and a clean single film is formed after drying. △: Slight coating unevenness occurs and it is difficult to apply, but a single film is formed after drying. Does not form a single clean film after drying

A pack cosmetic having the composition shown in the following Tables 1 and 2 was prepared, and a settling prevention effect test and usability evaluation of a pearl agent were performed.

[Table 1] ────────────────────────────────── Comparative example Example Comparative example ------ ------------------------------ ------ Component name 1 1 2 3 4 5 2 ─────チ タ ン Titanium mica 0.1% 0.1 0.1 0.1 0.1 0.1 0.1 Xanthan cam-0.02 0.1 0.5 1.0 2.0 3.0 Polyvinyl alcohol 14.0 14.0 13.5 12.0 10.0 7.0 5.0 Ethanol 10.0 10.0 10.0 10.0 10.0 10.0 10.0 10.0 1,3-Phantadiol 5.0 5.0 5.0 5.0 5.0 5.0 5.0 Polyethylene glycol 4000 2.0 2.0 2.0 2.0 2.0 2.0 2.0 Preservatives Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Appropriate amount Purified water residue Residual Residual Residual Residual Residual パ ー ル Pearl pigment × △ ○ ○ ○ ○ ○ Prevention of sedimentation Effect Usability ○ ○ ○ ○ ○ △ × ──── ──────────────────────────────

As is clear from Table 1, sedimentation of pearl pigment is observed when xanthan gum is not blended (Comparative Example 1), but sedimentation of pearl pigment is prevented when xanthan gum is blended at 0.02% or more. Excellent peeling stability. When the amount of xanthan gum exceeds 2% (Comparative Example 2), the usability deteriorates, and satisfactory results cannot be obtained.

Example 6 A peel-off mask having the following composition was prepared. [Formulation] (1) Polyvinyl alcohol 15.0% by weight (2) Xanthan gum 0.2 (3) Titanium mica 0.04 (4) 1,3-butylene glycol 4.0 (5) Polyethylene glycol 4000 2.0 (6) Citric acid 0.1 (7) Citric acid Sodium 0.3 (8) Ethanol 10.0 (9) Polyoxyethylene (16) 2-Octyl todecyl ether 1.0 (10) Preservatives Appropriate amount (11) Flavors Appropriate amount (12) Purified water Residue [Production method] From (1) to (12) After adding (7), heat and stir at 80 ° C to dissolve. (8) A solution obtained by dissolving (9) to (11) is added, mixed and cooled. This pack had a pearly appearance, did not cause titanium mica sedimentation, and had good usability.

Example 7 A peel-off mask having the following composition was prepared. [Prescription] (1) Polyvinyl alcohol 10.0% by weight (2) Polyvinyl acetate emulsion (resin content 50%) 15.0 (3) Xanthan gum 0.5 (4) Titanium mica 2.0 (5) Glycerin 5.0 (6) Dipropylene glycol 4.0 (7 ) Ethanol 10.0 (8) Polyoxyethylene (20) sorbitan monostearate 1.0 (9) Squalane 2.0 (10) Suitable amount of preservative (11) Suitable amount of fragrance (12) Purified water Residue [Production method] In accordance with Example 6. This pack-like white paste had an appearance in which a pearly feeling was further added, no precipitation of mica titanium occurred, and good usability was obtained.

Example 8 A peel-off mask having the following composition was prepared. [Prescription] (1) Polyvinyl alcohol 14.0% by weight (2) Xanthan gum 0.5 (3) Fish scale 0.1 (4) Titanium mica 0.1 (5) Polyethylene glycol 4000 2.0 (6) Glycerin 5.0 (7) Ethanol 10.0 (8) Preservative Appropriate amount (9) Perfume Appropriate amount (10) Purified water residue [Production method] In accordance with Example 6. This pack had a pearly glossy appearance, did not cause settling of titanium mica or fish scale foil, and showed good usability.

[0017]

The pack cosmetic according to the present invention has a pearly glossy appearance, does not cause sedimentation of the pearl pigment, and provides a pack cosmetic excellent in stability over time.

Claims (4)

[Claims] A pack cosmetic comprising a pearl pigment, xanthan gum and polyvinyl alcohol. 2. The pack cosmetic according to claim 1, which contains 0.02 to 2% by weight of xanthan gum. 3. The pack cosmetic according to claim 1, which contains 7 to 20% by weight of polyvinyl alcohol. 4. The pack cosmetic according to claim 1, wherein the pearl pigment is synthetic mica titanium.