JP7336934B2 - cleansing composition - Google Patents

Description

The present invention relates to cleansing compositions, particularly solid cleansing compositions with plasticity.

Cleansing compositions are commonly used to remove so-called make-up applied to the face. These cleansing compositions are usually liquid and contain oils or surfactants as make-up solvents.
These liquid cleansing compositions may drip during use, and have problems in terms of portability and usability, especially when going out.
Therefore, a solid cleansing composition that impregnates a liquid cleansing agent into easily disintegrating crystals and releases the liquid cleansing agent with crystal collapse during use has also been developed (Patent Documents 1 to 4).
According to these solid cleansing compositions, portability and usability can be improved, but on the other hand, they are sufficient for removing makeup that has penetrated deep into the pores, or for removing makeup while refraining from using water. can't do

JP 2017-160176 JP 2018-177651 JP 2019-81740 JP 2017-95375

The present invention has been made in view of the above-mentioned prior art, and the problem to be solved is to provide a plastic cleansing composition that can remove make-up and dirt so that the cleansing composition itself is plasticized and sticks to the skin. .

In order to solve the above problems, the plastic cleansing composition according to the present invention is
a silicone elastomer;
powder;
oil and
characterized by comprising
Further, a silicone elastomer of 1 to 7.5% by mass,
35 to 80% by mass of the dispersion medium of the silicone elastomer;
0.5% by mass or more of fine particle powder having an average particle size of less than 0.1 μm;
10 to 60% by mass of normal-sized powder having an average particle size of 0.1 μm or more;
including
It is preferable that the dispersion medium contains a volatile dispersion medium, and that the mass ratio of the volatile dispersion medium/total dispersion medium is 0.5 or more.
Moreover, it is preferable that the composition further contains 0.5 to 2% by mass of a hydrophobized polysaccharide.
In addition, the plastic cleansing composition according to the present invention is
3 to 10% by mass of a silicone elastomer,
30 to 60% by mass of the dispersion medium for the silicone elastomer;
20 to 42% by mass of porous powder having an average particle size of 0.1 μm or more;
characterized by comprising

According to the cleansing composition of the present invention, by pressing the plastic cleansing composition against the skin, it is possible to remove not only the skin mounds but also the cosmetics and wastes that have fallen into the skin grooves.

It is an explanatory view showing the state of the skin to which the foundation is applied. FIG. 2 is an explanatory diagram showing a state in which the product of the present invention (Test Example 6-2) is applied to the skin shown in FIG. 1;

Preferred embodiments of the present invention are described below.
[Silicone elastomer]
In the present invention, the silicone elastomer that is preferably used is an elastic body composed of crosslinked polymer silicone.
Examples of the silicone elastomer used in the present invention include (dimethicone/phenyl vinyl dimethicone) crosspolymer, (dimethicone/vinyl dimethicone/methicone) crosspolymer, (dimethicone/vinyl dimethicone) crosspolymer, dimethicone crosspolymer, (diphenyl dimethicone/ One or more crosslinked silicone resin powders such as vinyl diphenyl dimethicone/silsesquioxane) crosspolymer may be used.

The silicone elastomer may be blended in the form of a silicone gel consisting of a crosslinked silicone resin powder and a solvent. Such silicone gels can be commercially available products, for example, KSG-18A, KSG-16, KSG-15AP (manufactured by Shin-Etsu Silicone Co., Ltd.), Elastomer Blend DC9045 (manufactured by Dow Corning Toray Co., Ltd.), and the like. can be mentioned. The oil contained as a solvent in these silicone gels is classified as the dispersion medium, and the amount of the oil is added to the amount of the dispersion medium.
The amount of the silicone elastomer compounded in the present invention is 1 to 7.5% by mass in the composition when the fine particle powder described below is blended, and 3 to 7.5% by mass in the composition when the fine particle powder is not blended. It is preferably 10% by mass.

[Dispersion medium]
The plastic cleansing composition according to the present invention contains the dispersion medium of the silicone elastomer.
The dispersion medium consists of a liquid oil component and can satisfactorily disperse the silicone elastomer.
Since the dispersion medium used in the present invention may remain on the skin during cleansing, it is particularly preferable to mainly use a volatile dispersion medium.
The volatile dispersion medium in the present specification is a liquid oil having fluidity at normal temperature (25 ° C.), and is volatile (low boiling point of 260 ° C. or less at normal pressure) hydrocarbon oil and silicone oil (e.g. cyclic silicone oils), as well as low-viscosity (10 cs or less, preferably 5 cs or less) linear or branched silicone oils. These volatile dispersion media can be blended either singly or as a mixture of two or more.

Volatile or low-viscosity silicone oils include cyclic dimethylpolysiloxanes having 4 to 6 silicon atoms and linear dimethylpolysiloxanes having 2 to 5 silicon atoms. Specific examples include cyclic silicone oils such as hexamethylcyclotrisiloxane (D3), octamethyltetracyclosiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6), diphenylsiloxyphenyl trimethicone, dimethicone (10cs, 6cs, 5cs, 2cs, or 1.5cs) and the like. In particular, it is preferable to use silicone oil because of its compatibility with silicone elastomers, but low-boiling isoparaffinic hydrocarbon oils such as isododecane and isohexadecane can also be used.

In addition, a non-volatile oil can be used as the dispersion medium used in the present invention. Here, the non-volatile oil is a liquid oil having fluidity at room temperature (25° C.) and does not correspond to the above (A) volatile oil. It can be selected from oils that can be used in cosmetics and the like. For example, one or more of hydrocarbon oil or silicone oil having a boiling point of higher than 260° C. under normal pressure, or silicone oil having a viscosity of more than 10 cs can be used.

Specific examples of non-volatile liquid oils include linseed oil, camellia oil, macadamia nut oil, corn oil, olive oil, avocado oil, sasanqua oil, castor oil, safflower oil, Chinese ginseng oil, cinnamon oil, grape oil, almond oil, Rapeseed oil, sesame oil, sunflower oil, wheat germ oil, rice germ oil, rice bran oil, cottonseed oil, soybean oil, peanut oil, teaseed oil, evening primrose oil, egg yolk oil, cod liver oil, triglycerin, glyceryl trioctanoate, triisopalmitin Liquid oils and fats such as acid glyceryl; octanoic acid esters such as cetyl octanoate, isooctanoic acid esters such as glyceryl tri-2-ethylhexanoate and pentaerythrityl tetra-2-ethylhexanoate, lauric acid esters such as hexyl laurate, Myristate esters such as isopropyl myristate and octyldodecyl myristate, palmitate esters such as octyl palmitate, stearates such as isocetyl stearate, isostearates such as isopropyl isostearate, isopalmitate such as octyl isopalmitate esters, oleic acid esters such as isodecyl oleate, adipate diesters such as diisopropyl adipate, sebacate diesters such as diethyl sebacate, ester oils such as diisostearyl malate such as diisostearyl malate; liquid paraffin, squalane liquid hydrocarbon oils such as; Fluorine-modified silicone and the like are included.

In the present invention, the content of the dispersion medium in the composition is preferably 35-80% by mass.
Further, the dispersion medium used in the present invention is preferably adjusted so that the mass ratio of volatile dispersion medium/total dispersion medium is 0.5 or more. If the mass ratio of the volatile dispersion medium is less than 0.5, oil may remain on the skin during cleansing.

[powder]
In the present invention, fine particle powder and normal-sized powder are used as the powder.
Here, the fine particle powder means a powder having an average particle size of less than 0.1 μm, and the normal-size powder means a powder having an average particle size of 0.1 μm or more, particularly 1 μm or more.
Both fine-particle powders and normal-sized powders can be various powders that can be blended in skin preparations for external use. Specific examples of powder components include inorganic powders such as talc, kaolin, mica, silica, and zeolite; polyamide resin powders (nylon powders), polyethylene powders, polymethyl methacrylate powders, polystyrene powders, styrene and acrylic acid copolymer resin powder, organic powder such as cellulose powder; inorganic white pigments such as titanium dioxide and zinc oxide; inorganic red pigments such as iron oxide (red iron oxide); Inorganic yellow pigments; Black pigments such as black iron oxide and carbon black; Inorganic green pigments such as chromium oxide, chromium hydroxide and cobalt titanate; Inorganic blue pigments such as ultramarine blue and Prussian blue; Pearl pigments such as titanium oxide-coated mica, bismuth oxychloride, and fish scale foil; Metal powder pigments such as aluminum powder and copper powder; Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Yellow No. 205, Yellow No. 401, and Blue No. 404; Red No. 3, Red No. 104, Red No. 106, Red No. 227 , Red No. 230, Red No. 401, Red No. 505, Orange No. 205, Yellow No. 4, Yellow No. 5, Yellow No. 202, Yellow No. 203, Green No. 3 and Blue No. 1, etc. Zirconium, barium or aluminum lakes Organic pigments; natural pigments such as chlorophyll and β-carotene.

Among these, fine particle titanium dioxide and fine particle silica are particularly preferably used as the fine particle powder. Moreover, it is preferable that the content thereof is 0.5% by mass or more in the composition.
Cellulose powder and porous powder are preferably used as the normal-sized powder. The term "porous powder" as used herein refers to a powder having a large number of pores and a specific surface area of 100 m ² /g or more. The blending amount thereof is preferably 10 to 60% by mass in the composition.
A commercial product can be used as the porous powder, and Techpolymer MPB series (manufactured by Sekisui Plastics Co., Ltd.) is preferable.
In particular, when fine particle powder is not used, it is preferable to use porous powder as the normal-sized powder, and the blending amount is preferably 20 to 42% by mass in the composition.

[Hydrophobic Polysaccharide]
In the present invention, it is preferable to use a hydrophobized polysaccharide in order to prevent the plastic cleansing composition from tearing during cleansing. Hydrophobized polysaccharides include tri(trimethylsiloxy)silylpropylcarbamate pullulan, ethyl cellulose, propyl cellulose, hydroxyethyl cellulose, hydroxypropyl cellulose, ethyl hydroxyethyl cellulose, alkylated xanthan gum and the like. When silicone oil is used as the silicone elastomer and its dispersion medium, tri(trimethylsiloxy)silylpropylcarbamate pullulan is particularly preferably used.
The content of the hydrophobized polysaccharide is preferably 0.5 to 2% by mass in the composition.

[Other optional ingredients]
Examples of optional ingredients other than the above include thickeners, ceramides, vitamins, ultraviolet absorbers, chelating agents, bactericides, preservatives, plant extracts, amino acids, various chemicals, and lower alcohols such as ethanol. mentioned.

Hereinafter, more specific embodiments of the present invention will be described.

[Evaluation method]
(A) Hardness The plastic cleansing composition of the present invention removes residual cosmetics and wastes on the skin by an action similar to graphite removal by a kneaded eraser. Unlike ordinary liquid cleansing compositions, residual cosmetics and waste products are not removed by dissolution and washing away.
Therefore, moderate hardness and plasticity are required.
The hardness is the peak value when a sample stored at 25 ° C. is penetrated to 10 mm at a penetration speed of 1 mm / s using a Sun Rheometer (manufactured by Sun Scientific Co., Ltd.) 5 φ probe, and 20 to 700 gf is acceptable. range.

(B) Adherence to Skin The plastic cleansing composition of the present invention utilizes its plasticity to adhere to the skin, and absorbs and removes residual cosmetics and wastes like a kneaded eraser. Therefore, it is not preferable for the plastic cleansing composition itself to adhere or remain on the skin (excluding oil).
Therefore, the composition was actually adhered to the skin and the degree of adhesion to the skin was observed.
A: Not sticky B: Slightly sticky C: Slightly sticky D: Slightly sticky E: Sticky A to C were set as the allowable range.

(C) Ease of tearing The plastic cleansing composition according to the present invention can adhere to the skin due to its plasticity. For this reason, a force acts to stretch the composition during use, and if the composition is torn at this time, the workability is significantly reduced.
Therefore, the composition was actually applied to the skin, and the cutability was examined.
A: Difficult to cut B: Slightly difficult to cut C: Easy to cut A and B were defined as the allowable range.

First, the present inventors investigated the basic composition of a plastic cleansing composition that has physical properties similar to those of a kneaded eraser and has good adhesion to the skin.
Table 1 shows the results.

前記表１に示す結果より、シリコーンエラストマーとシクロペンタシロキサン、微粒子酸化チタン、及びメチルクロスポリマーにより練消しゴム様のクレンジング組成物が得られる（試験例１－１）。シリコーンエラストマーを含まない試験例１－２では固形にならず、また微粒子粉体ないし通常径粉体のいずれかを含まない試験例１－３，１－４では、いずれも粘着性が強く、組成物が肌に付着・残存してしまった。

From the results shown in Table 1 above, a kneaded eraser-like cleansing composition can be obtained from the silicone elastomer, cyclopentasiloxane, fine titanium oxide particles, and methyl crosspolymer (Test Example 1-1). Test Example 1-2, which does not contain a silicone elastomer, does not become solid, and Test Examples 1-3 and 1-4, which do not contain either fine particle powder or normal-sized powder, both exhibit strong stickiness and composition. The substance adheres to or remains on the skin.

Next, the present inventors investigated fine particle powder.
Table 2 shows the results.

前記表２に示す結果より、平均粒径０．０３μｍである微粒子酸化チタン（試験例２－１）、ないし０．０１２μｍである微粒子シリカ（試験例２－２）は、硬度、肌への付着性ともに優れた特性を示したが、０．２５μｍの顔料級酸化チタン（試験例２－３）、５μｍの球状シリカ（試験例２－４）を用いた場合には組成物が肌に付着・残存してしまい、クレンジング組成物としての機能を十分に発揮できなかった。
本発明者らがさらに詳細な検討を行ったところ、平均粒径０．１μｍ未満の微粒子粉体を配合することが好適であることが確認された。

From the results shown in Table 2, fine particles of titanium oxide having an average particle size of 0.03 μm (Test Example 2-1) and fine particles of silica having an average particle size of 0.012 μm (Test Example 2-2) had hardness and adhesion to the skin. However, when 0.25 μm pigment-grade titanium oxide (Test Example 2-3) and 5 μm spherical silica (Test Example 2-4) were used, the composition did not adhere to the skin. It remained, and the function as a cleansing composition could not fully be exhibited.
As a result of further detailed studies by the present inventors, it was confirmed that it is preferable to blend fine particles having an average particle size of less than 0.1 μm.

Next, the present inventors investigated a normal-sized powder having an average particle size of 0.1 μm or more.
Table 3 shows the results.

前記表３より明らかなように、通常径粉体については種類を選ばないが、特に多孔質粉体（試験例３－５）、セルロース粉体（試験例３－４）が好ましい。

As is clear from Table 3 above, any type of normal-sized powder can be used, but porous powder (Test Example 3-5) and cellulose powder (Test Example 3-4) are particularly preferred.

Next, the present inventors compared non-porous powders and porous powders in view of the fact that the porous powders are suitable for use.
Table 4 shows the results.

前記表４より明らかなように、ポリメタクリル酸メチルクロスポリマーには多孔質粉体と無孔質粉体が存在し、多孔質粉体を用いた場合にはやや硬度が上がる傾向にあるが、通常径粉体の２５質量％を多孔質粉体に置換した場合（試験例４－１）、５０％を置換した場合（試験例４－２）、７５％を置換した場合（試験例４－３）にはいずれも肌への付着性について良好な特性を発揮することが可能となった。
このため、通常径粉体は、多孔質粉体／通常粉体が質量比で０．２５以上であることが好ましい。

As is clear from Table 4, the polymethyl methacrylate crosspolymer includes porous powder and non-porous powder, and when porous powder is used, the hardness tends to increase slightly. When 25% by mass of normal diameter powder was replaced with porous powder (Test Example 4-1), when 50% was replaced (Test Example 4-2), when 75% was replaced (Test Example 4- In 3), all of them were able to exhibit good properties in terms of adhesion to the skin.
For this reason, it is preferable that the mass ratio of the porous powder/normal powder is 0.25 or more.

Next, the present inventors examined the compounding amounts of cyclopentasiloxane (dispersion medium) and normal-sized powder.
Table 5 shows the results.

前記表５に示す結果より、粉体の種類やエラストマーの量にもよるが、通常径粉体の配合量は組成物中１０～６０質量％、また分散媒の配合量は３５～８０質量％が好ましい。

From the results shown in Table 5, depending on the type of powder and the amount of elastomer, the amount of normal-sized powder is 10 to 60% by mass in the composition, and the amount of dispersion medium is 35 to 80% by mass. is preferred.

Next, the present inventors investigated how to improve the usability of the plastic cleansing composition. That is, when a cleansing composition is prepared from the silicone elastomer, dispersion medium, and powder, it may be torn off when rubbed against the skin. Therefore, the present inventors further added a hydrophobized polysaccharide to improve usability.
Table 6 shows the results.

表６より明らかなように、疎水化多糖（トリ（トリメチルシロキシ）シリルプロピルカルバミド酸プルラン）を配合することにより、組成物の切れやすさが顕著に改善される。しかしながら、シリコーン化プルランの配合量が多くなると肌への付着性が上昇する傾向にあるため、０．５～２質量％の配合とすることが好ましい。
ペースト状になっている本発明のクレンジング組成物（試験例６－２）を肌に接触させ、ファンデーションなどメイクアップや皮脂汚れをからめとるようにすると、図１、図２に示すように皮丘はもちろんのこと、皮溝に落ちたものまでもきれいに除去できる。

As is clear from Table 6, the blending of the hydrophobized polysaccharide (tri(trimethylsiloxy)silylpropylcarbamate pullulan) markedly improves the cutability of the composition. However, when the amount of siliconized pullulan added is increased, the adhesion to the skin tends to increase, so it is preferable to add 0.5 to 2% by mass.
When the cleansing composition of the present invention in paste form (Test Example 6-2) is brought into contact with the skin to remove make-up such as foundation and sebum stains, as shown in FIGS. Not only can you cleanly remove things that have fallen into the skin groove.

Next, the inventors investigated the compounding amount of the silicone elastomer.
Table 7 shows the results.

表７に示す結果より明らかなように、シリコーンエラストマーの好適な配合量は１～７．５質量％である。

As is clear from the results shown in Table 7, the preferred blending amount of the silicone elastomer is 1 to 7.5% by mass.

Next, the present inventors examined the blending amount of the fine particle powder.
Table 8 shows the results.

表８より、平均粒子径０．１μｍ以下の微粒子粉体を０．５質量％以上配合することにより、硬度が上昇し、肌への付着性が抑制できる。

From Table 8, it can be seen that adding 0.5% by mass or more of fine particles having an average particle size of 0.1 μm or less increases the hardness and suppresses adhesion to the skin.

Next, the inventors examined the necessity of fine-particle powder when porous powder is used as normal-sized powder.
Table 9 shows the results.

表９より、多孔質粉体を配合した場合には、その配合量を多くすることにより、微粒子粉体を配合しなくても、適正な硬度および肌への付着抑制を図ることができることが明らかとなった。微粒子粉体を配合しない場合の多孔質粉体の配合量は、組成物中２０質量％以上、好ましくは３０質量％以上であるが、４２質量％を超えると可塑性を有する固体とならず、粉体のまま吸油してしまうことがある。また、シリコーンエラストマーは３～１０質量％用いることが好ましい。

From Table 9, it is clear that when the porous powder is blended, by increasing the blending amount, it is possible to achieve appropriate hardness and suppression of adhesion to the skin without blending the fine particle powder. became. The content of the porous powder when the fine particle powder is not mixed is 20% by mass or more, preferably 30% by mass or more in the composition. The body may absorb oil. Also, it is preferable to use 3 to 10% by mass of the silicone elastomer.

Claims (3)

1 to 7.5% by mass of a silicone elastomer,
35 to 80% by mass of the dispersion medium of the silicone elastomer;
0.5% by mass or more of fine particle powder having an average particle size of less than 0.1 μm, which is one or more selected from fine particle titanium dioxide and fine particle silica;
Average grains of one or more selected from talc, mica, cellulose powder, nonporous polymethyl methacrylate crosspolymer, porous polymethyl methacrylate crosspolymer and polymethylsilsesquioxane 10 to 60% by mass of normal diameter powder having a diameter of 0.1 μm or more,
including
The plastic cleansing composition , wherein the dispersion medium comprises a volatile dispersion medium, and the volatile dispersion medium/total dispersion medium is 0.5 or more in mass ratio . A plastic cleansing composition according to claim 1, further comprising 0.5-2% by weight of a hydrophobized polysaccharide. 3 to 10% by mass of a silicone elastomer,
30 to 60% by mass of the dispersion medium for the silicone elastomer;
20 to 42% by mass of a polymethyl methacrylate crosspolymer that is a porous powder with an average particle size of 0.1 μm or more,
A plastic cleansing composition comprising: