JP5349867B2 - Solid powder cosmetic - Google Patents

Description

  The present invention relates to a solid powder cosmetic.

  Solid powder cosmetics are used as base makeup cosmetics such as foundations, fortunes, and makeup bases. As performance required for solid powder cosmetics, in addition to basic performance such as beauty of finish and sustainability, usability such as moistness and smoothness is important. Usability such as moistness and smoothness is improved by the addition of the silicone elastomer spherical powder, but the impact resistance of the product tends to be impaired by the addition of such a flexible powder.

  In recent years, in order to impart usability such as moistness and smoothness to solid powder cosmetics, a technology for blending a water-soluble moisturizer with a moisturizing effect and a polyhydric alcohol has been developed. Polyhydric alcohol has high hygroscopicity, and it has been difficult to mix stably and in large quantities. Thus, attempts have been made to eliminate such drawbacks. (For example, refer to Patent Document 1).

However, in the technique of Patent Document 1, the impact resistance is not sufficient, and there is a case where it is broken by dropping. In particular, stability under severe storage conditions is not sufficient, and basic performance and impact resistance deteriorate due to high temperature storage or periodic temperature changes (for example, storage at 50 ° C. or repeated between −20 ° C. and 60 ° C.) was there.
JP 2007-210895 A

  An object of the present invention is to provide a solid powder cosmetic that can impart moist and smooth skin and is excellent in stability and impact resistance.

The present invention contains water-soluble humectant and / or polyhydric alcohol 3-15% by mass, silicone elastomer spherical powder 1-15% by mass, and the organic value / inorganic property of the water-soluble humectant and polyhydric alcohol. The value is on the organic conceptual diagram,
(Inorganic value) + 0.5 * (Organic value) ≧ 300 and 0.3 ≦ (Inorganic value) / (Organic value) ≦ 2
The present invention provides a solid powder cosmetic characterized by being in the region of

  The solid powder cosmetic of the present invention can impart moist and smooth skin, is excellent in impact resistance, and is excellent in stability.

The water-soluble humectant and polyhydric alcohol used in the present invention is an organic conceptual diagram,
(Inorganic value) + 0.5 * (Organic value) ≧ 300 (Formula 1) and 0.3 ≦ (Inorganic value) / (Organic value) ≦ 2 (Formula 2)
Is in the area of The organic and inorganic values here are the values obtained by following the “Organic Conceptual Diagram (Basic and Applied)” Yoshio Koda (1985). Organic with the horizontal axis for organic and the vertical axis for inorganic. The nature of the substance can be known by its position on the conceptual diagram. For example, the larger the absolute value, the higher the boiling point and the less volatile. The ratio of the inorganic value to the organic value (IOB) represents the degree of polarity of the substance, and the larger this value, the higher the polarity. Therefore, Equation 1 represents the degree of non-volatility, and Equation 2 represents the degree of polarity.

  The water-soluble humectant and / or polyhydric alcohol used in the present invention may be a single type or a mixture of two or more types. When using a mixture of two or more, all of the components need to be satisfied for Formula 1, and all of the components need not be in the above organic value / inorganic value range for Formula 2, The weighted average value only needs to be within the above range.

  The value of [(inorganic value) + 0.5 * (organic value)] is preferably 300 or more, more preferably 300 to 1000. By setting the inorganic and organic values within this range, a moist and smooth feel can be obtained without becoming excessively heavy or sticky, and it is possible to prevent deterioration of storage stability due to volatilization of components. it can. Moreover, the range of a preferable IOB value is 0.3 to 2, More preferably, it is 0.5 to 1.5. By setting the IOB within this range, a moist and smooth feel can be obtained, and resistance to impacts such as dropping is increased.

Specific examples of such water-soluble humectants and / or polyhydric alcohols include oligoethylene glycol phosphate triesters, polyethylene glycols having a polymerization degree of 3 to 20, alkylene glycols such as polypropylene glycol, and lower alkyl ethers or lower groups thereof. Fatty acid esters; glycerin, diglycerin, polyglycerin, and lower alkyl ethers or lower fatty acid esters thereof; nitrogen-containing compounds such as urethane, urea and amide groups; cyclic oxygen-containing compounds such as cyclic ethers and cyclic carbonates; amino acids and the like It is done. Particularly preferable specific examples include tris (ethoxyethoxyethyl) phosphate (inorganic value 260 , organic value 360), and further, PPG700 (inorganic value 320, organic value 660), PEG400 (inorganic value). Value 775, organic value 360), glycerin (inorganic value 300, organic value 60), polyoxyethylene (10) methyl glucoside (inorganic value 925, organic value 520 ), polyoxypropylene (10) methyl glucoside (Inorganic value 375, organic value 720 ) and the like.

  The water-soluble humectant and / or polyhydric alcohol is preferably one that does not volatilize under storage at 50 ° C., and can be confirmed by mass change measurement using TG-DTA. Specifically, 18 ± 1 μg of water-soluble humectant and / or polyhydric alcohol is charged in an open aluminum container (diameter: 5.2 mm, height: 2.5 mm), and TG-DTA6200 (Seiko Instruments Inc.) ), The residual rate at 12 hours under an air gas flow rate of 100 ml / min and 50 ° C. is 90% by mass or more, more preferably 95% by mass or more.

  If a material having volatility is used, the stability is poor and the impact resistance after high-temperature storage may be deteriorated. For example, 1,3-butylene glycol (inorganic value 200, organic value 80), dipropylene glycol (inorganic value 220, organic value 120), etc. are generally recognized as non-volatile polyhydric alcohols. However, it is not a preferable one in the present invention. These volatile water-soluble humectants and / or polyhydric alcohols are preferably substantially not contained, and specifically 2% by mass or less is preferable.

  The water-soluble humectant and / or polyhydric alcohol is liquid at room temperature, and preferably has a viscosity at 25 ° C. of 10 to 200 mPa · s, particularly 15 to 100 mPa · s. It is preferable because it can be applied uniformly.

  The water-soluble humectant and / or polyhydric alcohol is preferably contained in the total composition in an amount of 3 to 15% by mass, particularly preferably 5 to 12% by mass. By setting it in this range, a moderate moist feeling and sufficient impact resistance can be obtained.

In the present invention, by using the silicone elastomer spherical powder, the skin has good spreadability and smooth usability can be imparted to the solid powder cosmetic.
The silicone elastomer spherical powder used in the present invention is selected from the group consisting of an organopolysiloxane elastomer spherical powder or a composite spherical powder using the same as a mother powder. 505C, Trefill E-506C, Trefill E-506S (Toray Dow Corning Co., Ltd.) and Silicone Powder KSP-100 (Shin-Etsu Chemical Co., Ltd.).

  The silicone elastomer spherical powder can be used alone or in combination of two or more, and is preferably contained in the total composition in an amount of 1 to 15% by mass. It is preferable because smooth usability can be obtained.

  The silicone elastomer spherical powder preferably has an average particle size of 0.01 to 100 μm, particularly 0.1 to 30 μm. The silicone elastomer spherical powder preferably has a true specific gravity of 0.9 to 1.2, particularly 0.9 to 1.1. Furthermore, the silicone elastomer spherical powder preferably has a rubber hardness measured according to the JIS-A method of 5 to 95, particularly 10 to 90.

  In addition to the above components, the solid powder cosmetic of the present invention is a solid pigment, plate-like powder, ultraviolet absorber, surfactant, antioxidant, preservative, fragrance and the like as long as the effects of the present invention are not impaired. Ingredients common to powder cosmetics can be included.

(Production method)
The solid powder cosmetic of the present invention is prepared by adding a fluid component containing a water-soluble humectant and / or a polyhydric alcohol to a powder containing a silicone elastomer spherical powder, pulverizing the resulting mixture with a pulverizer, It can be produced by molding and solidifying the pulverized product. As a pulverizer to be used, any pulverizer that is usually used for pulverization can be used, and examples thereof include an atomizer, a hammer mill, a jet mill, and a cutter mill.

Examples 1 and 2 and Comparative Examples 1 to 7
A powder foundation having the composition shown in Table 1 was produced by the following procedure. The resulting powder foundation was evaluated for feel (moistness, smoothness, stretch) and impact resistance. The results are also shown in Table 1. Content in a following example is the mass%.

(Manufacturing procedure)
1. 1 to 9 shown in Table 1 were mixed and stirred.
2. To this, 10 to 17 uniformly dissolved and mixed were added and mixed.
3. The obtained mixture was pulverized and compression molded into an inner dish.

(Evaluation method)
(1) Feel;
Ten professional panelists used a powder foundation and evaluated the moistness, smoothness, and spread on a five-point scale.

(Moist)
5: Very moist.
4: Moist.
3: Usually.
2: Moist feeling is slightly poor.
1: There is no moist feeling.
The average score of 10 people was scored according to the following criteria.
○: The average value is 4 or more.
Δ: The average value is 2 or more and less than 4.
X: The average value is less than 2.

(Smoothness)
5: Very smooth.
4: Smooth.
3: Usually.
2: A smooth feeling is slightly poor.
1: There is no smooth feeling.
The average score of 10 people was scored according to the following criteria.
○: The average value is 4 or more.
Δ: The average value is 2 or more and less than 4.
X: The average value is less than 2.

(Nobi)
5: Very good.
4: Good stretch.
3: Usually.
2: The spread is slightly bad.
1: The spread is bad.
The average score of 10 people was scored according to the following criteria.
○: The average value is 4 or more.
Δ: The average value is 2 or more and less than 4.
X: The average value is less than 2.

(2) Impact resistance;
The obtained powder foundation was dropped from a height of 30 cm onto a SUS plate having a thickness of 20 mm, and the impact resistance was evaluated from the number of times until cracking occurred.
○: 12 times or more.
Δ: 5 to 11 times.
X: 4 times or less.

(3) Impact resistance after storage:
The obtained powder foundation was stored at 50 ° C. for 10 days, and then subjected to the impact resistance test.

Example 4 (powder foundation)
A powder foundation having the following composition is produced in the same manner as in Example 1. The resulting powder foundation is moist and smooth and has excellent impact resistance and storage stability.
(1) Talc remaining amount (2) Mica 20.0
(3) Silicone elastomer powder 4.0
(4) Nylon powder 4.0
(5) Titanium oxide 10.0
(6) Iron oxide yellow 3.0
(7) Iron oxide red 1.0
(8) Iron oxide black 0.3
(9) Polypropylene glycol 700 6.0
(10) Squalane 3.0
(11) 2-Ethylhexyl paramethoxycinnamate 2.7
Total 100.0

Example 5 (powder foundation)
A powder foundation having the following composition is produced in the same manner as in Example 1. The resulting powder foundation is moist and smooth and has excellent impact resistance and storage stability.
(1) Silicone-treated talc Remaining amount (2) Silicone-treated mica 20.0
(3) Silicone elastomer powder 10.0
(4) Nylon powder 5.0
(5) Silicone-treated titanium oxide 10.0
(6) Silicone-treated iron oxide yellow 3.0
(7) Silicone-treated iron oxide red 1.0
(8) Silicone-treated iron oxide black 0.3
(9) Polyoxyethylene methyl glucoside 3.0
(10) Squalane 3.0
(11) Liquid paraffin 3.0
(11) 2-Ethylhexyl paramethoxycinnamate 2.7
Total 100.0

Example 6 (Funny)
The following composition is prepared in the same manner as in Example 1. The resulting mushy, moist and smooth material is excellent in impact resistance and storage stability.
(1) Talc 58.0
(2) Mica 10.0
(3) Mica titanium 5.0
(4) Silicone elastomer spherical powder 10.0
(5) Nylon powder 10.0
(6) Titanium oxide 0.5
(7) Iron oxide yellow 0.2
(8) Iron oxide red 0.2
(9) Iron oxide black 0.1
(10) Phosphoric acid triester 5.0
(11) Dimethylpolysiloxane 1.0
Total 100.0

Claims (2)

  A solid powder cosmetic containing 3 to 15% by mass of tris (ethoxyethoxyethyl) phosphate and 1 to 15% by mass of a silicone elastomer spherical powder. The solid powder cosmetic according to claim 1, further comprising PPG700, PEG400, glycerin, polyoxyethylene (10) methylglucoside, or polyoxypropylene (10) methylglucoside.