JP2011079780A - Powder cosmetic - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that although it is hardly necessary to consider the contamination of powder cosmetics with microorganisms in an unused state, the contamination by mixing with water and from the hands, a cosmetic powder puff, the air and the like has to be considered after starting the use and due to this, an aseptic is incorporated in consideration of antibacterial properties even in these powder cosmetics but sufficient antibacterial activity cannot be obtained with these powder cosmetics. <P>SOLUTION: A powder cosmetic contains sodium chloride as an essential component. The amount of the sodium chloride incorporated is not particularly limited and normally the sodium chloride may be incorporated in an amount of 0.001-1 wt.%. A preferred amount is 0.01-0.5 wt.%. With amounts of 0.001 wt.% or less the effect is sometimes not sufficient and with amounts of 1 wt.% or more there is no increase in the effect, and such amounts are uneconomical. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a powder cosmetic. Specifically, the present invention relates to a powder cosmetic excellent in antibacterial properties using sodium chloride.

  Conventionally, cosmetics include basic cosmetics such as soap, lotion, milky lotion, cream, makeup cosmetics such as funny, foundation, lipstick, blusher, and eyeliner, and cosmetics for hair such as perfumes, shampoos, rinses, and hair colors. It is on the market.

  These cosmetics contain a large amount of nutrients in which fungi, bacteria, etc. are likely to grow, and there is a high possibility that these microorganisms will be mixed in the cosmetics and propagate during repeated use. In particular, cosmetics such as lotion, milky lotion, and cream contain a large amount of water and oil, and are under conditions that allow microorganisms to grow very easily. Therefore, in these cosmetics, preservatives are blended to prevent deterioration of quality so that they do not propagate even if mold or bacteria are mixed from the outside during use.

  Known antiseptics used in these cosmetics include antimicrobial essential oils such as salicylates and phenols of paraoxybenzoates, sorbic acid, dehydroacetic acid, bisabolol and the like.

  However, in order to maintain an appropriate antibacterial effect, a method of blending a large amount of preservatives or selecting and blending several kinds of preservatives having different antiseptic effects is used.

  On the other hand, among the cosmetics described above, there are also powder cosmetics mainly composed of powder such as funny, baby powder, powder foundation, and eye shadow. As the base material for these powder cosmetics, various inorganic and organic powders such as talc, mica, sericite, and zinc oxide are generally used. These base materials are blended with pigments such as titanium oxide, yellow iron oxide, and bengara, astringents such as allantochlorohydroxyaluminum and zinc phenolsulfonate, and oils such as fats and oils as necessary.

  Normally, these powder cosmetics do not contain water or alcohol in the formulation, and there is little need to consider microbial contamination when not in use. It is necessary to consider contamination from cosmetic puffs and air. For this reason, antiseptic | preservative is mix | blended also in these powder cosmetics in consideration of antibacterial property.

  However, sufficient antibacterial activity was not obtained with these powder cosmetics. This is presumed to be due to the following reason. That is, unlike cosmetic lotions, milky lotions, creams, shampoos, rinses, etc., powder cosmetics contain oil, but due to their characteristics, water and alcohol are hardly added. For this reason, even if a preservative is blended in the powder cosmetic, the preservative aggregates and is unevenly dispersed in the powder cosmetic. In addition, it is considered that the powder cosmetics have a small amount of moisture and cannot fully exhibit their effects.

  By the way, sodium chloride is conventionally blended for the purpose of improving the usability of the W / O emulsion composition (Patent Document 1) or blended as an astringent (Patent Document 2). It was blended with the expectation of an effect (Patent Document 3), and blended for the purpose of improving transparency with a frame kneaded soap (Patent Document 4). However, there was no idea of adding sodium chloride for antibacterial purposes.

JP 11-106310 A Japanese Patent Laid-Open No. 10-330240 Japanese Patent Laid-Open No. 10-330241 JP 2004-256805 A

  The present invention has been made in view of the above-mentioned problems of the prior art, and is sufficient for microorganisms such as fungi, yeast, Escherichia coli and Pseudomonas aeruginosa using a powder made of sodium chloride having excellent safety. Another object of the present invention is to provide an antibacterial powder cosmetic having a growth inhibitory effect.

  Therefore, as a result of intensive investigations to solve the above problems, the present inventors have found that by adding sodium chloride as an essential component, a remarkable antibacterial effect and antiseptic effect are improved, and the present invention is completed. It came to.

  The powder cosmetic according to the present invention is characterized by containing sodium chloride as an essential component. In this invention, the compounding quantity of sodium chloride is although it does not specifically limit, Usually, 0.001-1 weight% is good to mix | blend. Preferably it is 0.01 to 0.5 weight%. If it is 0.001% by weight or less, the effect may not be sufficient, and if it is 1% by weight or more, the effect is not enhanced and it is uneconomical.

  The particle diameter of the sodium chloride powder cosmetic used in the present invention is not particularly limited, and may be blended, but is preferably 10 μm or less. This is because the feeling of use may be affected when the thickness is 10 μm or more.

  The method for refining sodium chloride is not particularly limited, but it may be finely pulverized with a ball mill, an atomizer, a mixer, a likai machine or the like.

  In the present invention, sodium chloride alone provides a sufficient effect even without other preservatives, but may be used in combination with other preservatives.

  According to the present invention, a powder cosmetic that exhibits a high antibacterial effect can be obtained.

As described above, the powder cosmetic in the present invention is mainly composed of powders such as talc, mica, sericite, and zinc oxide, and is a solid cosmetic that is formed by powder or pressing. It excludes liquid substances and viscous dosage forms dissolved in water or alcohol. Examples thereof include white powders, foundations, blushers, and eye shadows. More specifically, examples of white powder include powdered white powder, solid white powder, paper white powder, and baby powder and talcum powder. Examples of foundations include so-called powdery type, amphibious type, and cake type. Examples of blushers include solid blushers, and examples of eye shadows include solid powder eye shadows. Furthermore, although not included in these classifications, for example, it is also applicable to powdered and solid cosmetics which are mainly composed of vitamin C and its derivatives and dissolved in water or alcohol for use. is there.

  Sodium chloride used in the present invention is used as a constituent of powder cosmetics, but other constituents can be used without any difference from conventional constituents. For example, various inorganic powders such as talc, kaolin, silica, mica, sericite, calcium carbonate, magnesium carbonate, aluminum silicate, calcium silicate, magnesium silicate, barium sulfate, calcium phosphate, and various organic powders For example, nylon powder, polyethylene powder, polystyrene powder, polymethyl methacrylate powder, polyfluorinated ethylene powder, cellulose powder, and other powder components such as inorganic pigments and organic pigments are used. In addition to these, various oil components and surfactants can be used as necessary. Furthermore, it can be used in combination with various synthetic antibacterial agents such as paraoxybenzoate esters that have been widely used in the past or natural antibacterial agents. Can be obtained.

  As described above, the present invention improves the antibacterial effect in powder cosmetics, which has heretofore been insufficient, by blending powder made of sodium chloride.

  As described above, in the present invention, sodium chloride is added to improve the antibacterial properties and preservability of the powder cosmetic, and it is sufficient to perform normal mixing treatment.

  Next, the present invention will be described in more detail based on the following examples. Needless to say, the present invention is not limited to the following examples. In the following description, “%” means “% by weight”.

Example 1 (Antimicrobial test)
After inoculating the bacterial solution in 30 g of the sample, the change in the number of bacteria was examined by the pour method. As the inoculum, fungi, yeast and bacteria were used, and the antiseptic power was evaluated based on the change in the number of bacteria until the lapse of 4 weeks, and the obtained results were classified into the following four criteria. Of the following classifications, ◎ or ○ were judged as acceptable.

A: An effect is recognized immediately.
○: The effect is gradually recognized.
Δ: Almost no effect is recognized.
X: An effect is not recognized at all.

  The above-mentioned antiseptic ability judgment test was conducted on the powdery cosmetics of the present invention having the formulations shown in Tables 1 and 2 below, the solid powder and the comparative examples thereof, and the results were described. In addition, the manufacturing method of these funny and solid surprises followed the method generally used.

Example 2 (powdered)
Ingredient name Compounding amount (%)
Talc 75.9
Mica 10.0
Sericite 10.0
Titanium dioxide 3.0
Sodium chloride (average particle size 3 μm) 0.1
Total 100.0

Example 3 (Solid white)
Ingredient name Compounding amount (%)
Talc 68.6
Mica 10.0
Sericite 10.0
Titanium dioxide 3.0
Squalane 5.0
Butyl paraoxybenzoate 0.1
Sodium chloride (average particle size 5 μm) 0.1
Total 100.0

Example 4 (baby powder)
Ingredient name Compounding amount (%)
Talc 96.7
Zinc oxide 3.0
Sodium chloride (average particle size 1 μm) 0.3
Total 100.0

Example 5 (powder foundation)
Ingredient name Compounding amount (%)
Talc 15.0
Mica 30.0
Sericite 18.2
Nylon powder 10.0
Titanium dioxide 16.0
Bengala 0.5
Yellow iron oxide 1.0
Black iron oxide 0.2
Squalane 5.0
Lanolin 1.0
Octyldodecyl myristate 2.0
Sorbitan monooleate 1.0
Sodium chloride (average particle size 3μm) 0.01
Methyl paraoxybenzoate 0.09
Total 100.0

Example 6 (both-use foundation)
Ingredient name Compounding amount (%)
Silicone-treated talc 22.0
Silicone-treated mica 44.9
Nylon powder 5.0
Silicone-treated fine particle titanium dioxide 5.0
Silicone-treated titanium dioxide 10.0
Silicone treated bengara 0.5
Silicone-treated yellow iron oxide 1.0
Silicone-treated black iron oxide 0.2
Squalane 4.0
Solid paraffin 0.5
Dimethylpolysiloxane 4.0
Octyl paramethoxycinnamate 2.0
Sodium chloride (average particle size 10μm) 0.9
Total 100.0

Example 7 (cake foundation)
Ingredient name Compounding amount (%)
Talc 27.8
Mica 24.43
Sericite 10.0
Titanium dioxide 10.0
Zinc oxide 5.0
Bengala 0.5
Yellow iron oxide 1.0
Black iron oxide 0.2
Squalane 10.0
Isostearic acid 3.0
Octyldodecyl myristate 4.0
Sorbitan monooleate 3.0
Octyl paramethoxycinnamate 1.0
Methyl paraoxybenzoate 0.02
Sodium chloride (average particle size 3μm) 0.05
Total 100.0

Example 8 (blusher)
Ingredient name Compounding amount (%)
Mica 23.0
Sericite 71.6
Bengala 0.05
Black iron oxide 0.05
Red 223 0.1
Liquid paraffin 5.0
Sodium chloride (average particle size 5 μm) 0.2
Total 100.0

Example 9 (Eyeshadow)
Ingredient name Compounding amount (%)
Mica 34.55
Sericite 45.9
Ultramarine 2.0
Titanium dioxide 0.05
Black iron oxide 0.5
Mica titanium 10.0
Liquid paraffin 5.0
Sorbitan sesquioleate 1.0
Sodium chloride (average particle size 10 μm) 1.0
Total 100.0

According to the present invention, antibacterial properties can be sufficiently exhibited by blending sodium chloride as an active ingredient. As a result, rot and mold growth after opening can be suppressed, and the preservability of the powder cosmetic can be improved. In Examples 2 to 9, good antibacterial effect was obtained.

Claims (4)

  An antibacterial powder cosmetic comprising a powder comprising sodium chloride as an essential component.   The antibacterial powder cosmetic according to claim 1, wherein the powder comprises sodium chloride in an amount of 0.001 to 1% by weight.   The antibacterial powder cosmetic according to claim 1, wherein the powder comprises sodium chloride in an amount of 0.01 to 0.5% by weight. The antibacterial powder cosmetic according to claim 1 or 3, wherein the sodium chloride has an average particle size of 10 µm or less.