JP4615680B2 - Flakes glass for cosmetics and cosmetics containing the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  This inventionFlake glass for cosmeticsAnd a cosmetic containing the same.
[0002]
[Prior art]
  Flake glassIs a very fine glass material whose thickness is on the order of microns.
[0003]
  thisFlake glassFor example, when the surface is coated with titania, it exhibits a pearly color tone. This pearlyFlake glassThe product which has a pearl tone is provided by mix | blending with cosmetics and resin.
[0004]
  For example, Japanese Patent Laid-Open No. 62-187770 includes:Flake glassDescribes an ultraviolet shielding pigment formed by coating fine particle titanium oxide. However, the titanium oxide is coated in such an amount that the pearl luster is practically not exhibited. thisFlake glassIs described as being useful as a cosmetic raw material.
[0005]
  JP-A-11-130978 discloses a rutile TiO having a thickness of 50 to 250 angstroms on the surface.₂Having a layerFlake glassIs disclosed. thisFlake glassDescribes that it is used as a pearl-tone resin composition or a pearl-tone pigment used in paints.
[0006]
  Incidentally, in Japanese Patent Laid-Open Nos. 5-306134 and 5-306143, there is a metal coating.Flake glassIs disclosed. These publications include this metal coatingFlake glassSpecifically, metal coatingFlake glassNot only this but also SiO by sol-gel method₂TiO₂Metal coating coated with materials such asFlake glassIt can also be applied to.
[0007]
[Problems to be solved by the invention]
  Micron order materialFlake glassSince the specific surface area (surface area per unit mass) is very large, elution of the glass component and components added or applied during processing to the outside occurs. This can cause problems with safety and properties, and the elution components can affect other materials that come into contact.Flake glassThere is a case that cannot be used.
[0008]
  In cosmetics, the demand for safety has increased in recent years, and the titania is coated.Flake glassWhen a cosmetic compound containing is applied to the skin,Flake glassOf these components, boron oxide may be eluted.
[0009]
  by the way,Flake glassAs for the type, C glass manufactured by Nippon Sheet Glass Co., Ltd.Flaky glassAnd E glassFlaky glassHowever, C glass contains 0-8% C glass and 5-13% E glass (Nippon Sheet Glass Co., Ltd., Micro Glass)(Registered trademark)According to the catalog).
[0010]
  In addition, according to “Composition Standards by Cosmetic Variety” supervised by the Department of Pharmacy, Ministry of Health and Welfare (Pharmaceutical Daily Inc., issued on April 18, 1997), the amount of dissolved boron is 20 ppm or less in the “boron nitride” item. There are provisions.
[0011]
  In addition, pearl toneFlake glassAs for the glass that is the base material of this, there is no provision for the amount of dissolved boron in the “glass powder” of the same standard. However, from the viewpoint of safety, the amount of elution is always small.
[0012]
  Titanium oxide includes anatase and rutile crystal systems. When rutile type titanium oxide having a high refractive index and a stronger pearl tone is coated on the surface of the base material, tin may be used as a catalyst. Tin is a heavy metal and has a safety problem.
[0013]
  like thisFlake glassIn this case, it is important to prevent elution of other components such as boron oxide contained in the glass component and heavy metals used for imparting various functions.
[0014]
  However, as a result of applying means for preventing elution, the characteristics as a pigment (color, brightness, pearl feeling) and the characteristics as a cosmetic raw material (slip feeling on the skin, fit feeling) must not be impaired.
[0015]
  In the above-mentioned JP-A-11-130978, TiO₂Having a layerFlake glassIs disclosed, but TiO₂In the layer, elution of glass components cannot be prevented.
[0016]
  Further, in the metal-coated flaky glass coated with the protective coating layer disclosed in JP-A-5-306134 and JP-A-5-306143, the protective coating layer is formed by oxidizing the metal coating and changing the color tone. It is provided to prevent it.
[0017]
  Therefore, the present inventionSuch as boronAn object of the present invention is to provide a glass flake for cosmetics capable of preventing elution of glass components and further elution of components used for imparting various functions.
[0018]
[Means for Solving the Problems]
  As a result of intensive studies in view of safety as a cosmetic raw material, properties, and properties as a pigment, the present inventors have determined the surface of flake glass as follows:Cover with a functional film made of titania,SiriMosquitoIt was found that by coating, elution of components such as boron in glass and tin as a catalyst can be prevented.
[0019]
  The flaky glassTitania and silicaEven if it coats with, it does not impair the characteristics, such as a color and a brightness | luminance as a pearl tone pigment, a slipperiness, and a feeling of fitting. Therefore, the flaky glass according to the present invention can be used as a cosmetic raw material and is excellent in safety.
[0020]
  That is, the present invention provides a surface of the invention as claimed in claim 1.A functional film made of titania is formed on it.SiriMosquitoA glass component elution prevention coating is formed, and the boron elution amount is 0.25 ppm or less.In addition, the color difference ΔE from the case where the glass component elution prevention coating is not formed is 3 or less, and has a pearly color tone.This is a flaky glass for cosmetics.
[0021]
  As invention of Claim 2, as described in Claim 1Flake glass for cosmeticsIn the coating, the coating isFlake glassIt is coated with 0.1 to 30% by mass%.Flake glass for cosmeticsIt is.
[0022]
  As invention of Claim 3, as described in Claim 1Flake glass for cosmeticsIn the coating, the coating isFlake glassIt is coated with 0.5 to 25% by mass%.Flake glass for cosmeticsIt is.
[0023]
  As invention of Claim 4, as described in Claim 1Flake glass for cosmeticsIn the coating, the coating isFlake glassThe coating is 1% to 20% by mass%.Flake glass for cosmeticsIt is.
[0024]
  As invention of Claim 5, as described in Claim 1Flake glass for cosmeticsIn the above, the coating is formed by a metal salt methodFlake glass for cosmeticsIt is.
[0027]
  Claim6In the flaky glass for cosmetics according to claim 1, the flaky glass has an average thickness of 0.1 to 2.5 μm, an average particle diameter of 1 to 300 μm, and an aspect ratio of 10 to 500. A flaky glass for cosmetics. However, the aspect ratio is defined as average particle diameter / average thickness.
[0028]
  Claim7As an invention of the present invention,6Either1 itemA cosmetic comprising the flaky glass for cosmetics described in 1 above.
  The application field of the flaky glass according to the present invention is not limited to cosmetics and can be applied to the following fields. In other words, it can be used as a filler or pigment that is applied to food, cosmetics, pharmaceutical packaging, containers, resins, films, paints, inks, and other applications that require safety.
[0029]
  It can also be used as fillers and pigments for resins, films, paints, inks, etc. in the fields of electronics, electricity, and semiconductors that dislike elution of alkalis and trace components.
  Other,Flake glassIt can be used in a field where elution of the component itself or a trace amount of added components during processing has been a problem.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
  Before forming the glass component elution-preventing coating applied to the present inventionFlake glassThere is no particular limitation. Considering use as a cosmetic raw material, it has the following composition and shape:Flake glassAre preferably used. That is, the base material is silica (SiO 2₂) In an amount of 45 to 75% by mass, an average thickness of 0.1 to 2.5 μm, an average particle size of 1 to 300 μm, and an aspect ratio of 10 to 500Flake glassIt is. Here, the aspect ratio is defined as “average particle diameter / average thickness”.
[0031]
  In addition, the surface of this flaky glass is coated with titania in advance, and the flaky glass having a pearly toneDo.
  On the surface of this flaky glass,MosquitoBy forming the coating, as will be apparent from the examples described below,Such as boronThe elution of glass components could be prevented. Also, even if blended into cosmetics,silicaIs a flake glass for cosmetics that does not impair the color, brightness, slipperiness, and fit.
[0032]
  Further, as is clear from the examples described later, elution of tin used as a catalyst when coating not only the glass component but also rutile titanium oxide could be prevented.
[0033]
  silicaAs an amount to be coated with, it is preferable to coat about 0.1 to 30% by mass ratio with respect to the flaky glass before coating. When this amount is 0.1% by mass or less, the elution prevention effect is small.
[0034]
  On the other hand, when the coating amount of silica exceeds 30% by mass, cracks are likely to enter and peel off from the coating. Moreover, the raw material used for coating formation is bulky and the cost is increased. For example, a pearl tone coated with titaniaFlake glassThen, if the coating amount exceeds 30% by mass, the pearl toneFlake glassAs a result, the effect as a glitter pigment is diminished.
[0035]
  As a coating amount of silica, 0.5 to 25% by mass is more preferable, and 1 to 20% by mass is most preferable.
  As a method for forming the coating layer, a general method such as a method of depositing an oxide from a metal salt on the powder surface, a sol-gel method, a CVD method, or an LPD method can be used.
[0036]
  Examples of the method for forming the silica film include the following methods. That is, as disclosed in Japanese Examined Patent Publication No. 46-9555, sodium silicate (water glass) is added to a powder slurry under an alkali to precipitate silica on the powder surface (metal salt method).
[0037]
  Further, as disclosed in Japanese Patent Publication No. 48-32415, a mixture of powder and tetraalkoxysilane is put into a basic solution, and a silica film is formed on the powder surface by hydrolysis of tetraalkoxysilane. Method (sol-gel method).
[0038]
  Further, as disclosed in JP-A-3-066764, the powder is suspended in a hydrosilicofluoric acid solution, and the equilibrium is shifted by adding boric acid or aluminum or raising the temperature, and In which silica is formed (LPD method).
[0041]
  thisTitania and silicaWhen the flaky glass for pearly cosmetics coated with is blended into cosmetics, the glass component is not eluted. In addition, it has a clear color with no dullness, has no roughness, and is a cosmetic with excellent skin feel and adhesion. Moreover, the boron elution amount of the flaky glass for pearl cosmetics is 0.25 ppm or less.
[0042]
  This pearl toneFlake glass for cosmeticsThe blending amount of the cosmetic in the cosmetic is 1 to 100% by mass in the total amount of the cosmetic. Note that the blending amount of 100% means pearl tone.Flake glassIs used directly as a cosmetic, for example, pearl toneFlake glassIt is used for sprinkling on a foundation.
[0043]
  Of the present inventionFlake glass for cosmeticsAs cosmetics to which is applied, there are a wide range of cosmetics such as facial cosmetics, makeup cosmetics, hair cosmetics and the like. For example, it is preferably applied to makeup cosmetics such as foundation, powdered white powder, eye shadow, blusher, makeup base, nail enamel, eyeliner, mascara, lipstick, and fancy powder.
[0044]
  This pearl toneFlake glass for cosmeticsMay be appropriately hydrophobized according to the purpose of the cosmetic. Hydrophobic treatment includes methylhydrogenpolysiloxane, high-viscosity silicone oil, treatment with silicone compounds such as silicone resin, treatment with surfactants such as anion activator and cation activator, nylon, polymethyl methacrylate, polyethylene , Methods such as treatment with polymer compounds such as fluororesin and polyamino acid, treatment with perfluoro group-containing compounds, lecithin, collagen, metal soap, lipophilic wax, polyhydric alcohol partial ester or complete ester, etc. Compound processing is mentioned. However, any method can be used as long as it is generally applicable to the hydrophobizing treatment of the powder, and is not limited to these methods.
[0045]
  The cosmetic of the present invention has the above-mentioned pearl tone.Flake glass for cosmeticsIn addition to the above, other components usually used in cosmetics can be appropriately blended as necessary. Examples of other components include inorganic powder, organic powder, pigment, dye, oil component, organic solvent, resin and plasticizer.
[0046]
  For example, as the inorganic powder, talc, kaolin, sericite, muscovite, phlogopite, saucite, biotite, lithia mica, vermiculite, magnesium carbonate, calcium carbonate, diatomaceous earth, magnesium silicate, calcium silicate, aluminum silicate, Examples thereof include barium silicate, barium sulfate, strontium silicate, metal tungstate, silica, hydroxyapatite, zeolite, boron nitride, and ceramic powder.
[0047]
  Examples of the organic powder include nylon powder, polyethylene powder, polystyrene powder, benzoguanamine powder, polytetrafluoroethylene powder, distyrenebenzene polymer powder, epoxy powder, and acrylic powder.
[0048]
  Examples of the pigment include inorganic white pigments such as titanium oxide such as microcrystalline cellulose and zinc oxide, inorganic red pigments such as iron oxide (Bengara) and iron titanate, inorganic brown pigments such as γ iron oxide, Inorganic yellow pigments such as yellow iron oxide and ocher, inorganic black pigments such as black iron oxide and carbon black, inorganic purple pigments such as mango violet and cobalt violet, chromium oxide, chromium hydroxide and cobalt titanate Such as inorganic green pigments such as ultramarine and bitumen, titanium oxide coated mica, titanium oxide coated bismuth oxychloride, bismuth oxychloride, titanium oxide coated talc, fish scale foil, colored titanium oxide coated mica, etc. Examples thereof include pearl pigments and metal powder pigments such as aluminum powder and copper powder.
[0049]
  As dyes, red 201, red 202, red 204, red 205, red 220, red 226, red 228, red 405, orange 203, orange 204, yellow 205, yellow 401 And organic pigments such as No. 404 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, Organic pigments such as yellow No. 202, yellow No. 203, green No. 3 and blue No. 1 such as zirconium, barium or aluminum lake, natural pigments such as chlorophyll, β-carotene and the like.
[0050]
  Furthermore, as oily components, squalane, liquid paraffin, petrolatum, microcrystalline wax, okezolite, ceresin, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, cetyl alcohol, hexadecyl alcohol, oleyl alcohol, 2-ethylhexane Cetyl acid, 2-ethylhexyl palmitate, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, glycerol tri-2-ethylhexanoate, -2-octyldodecyl oleate, isopropyl myristate, triisostearin Acid glycerol, tricoconut oil fatty acid glycerol, olive oil, avocado oil, beeswax, myristyl myristate, mink oil, lanolin and other hydrocarbons, silicone oil, higher fatty acids, oils and fats Ethers, higher alcohols, waxes, and the like.
[0051]
  Also, organic solvents such as acetone, toluene, butyl acetate and acetate, resins such as alkyd resins and urea resins, plasticizers such as camphor and acetyltributyl citrate, UV absorbers, antioxidants, preservatives, surfactants , Moisturizer, fragrance, water, alcohol, thickener and the like.
[0052]
  Examples of the cosmetic according to the present invention include powders, cakes, pencils, sticks, ointments, liquids, emulsions, and creams.
[0053]
【Example】
  Hereinafter, the present invention will be described in more detail with reference to examples and comparative examples. However, the present invention is not limited to the following examples as long as the gist of the present invention is not exceeded.
[0054]
  (Example 1) to (Example 8)
  First pearlyFlake glassWas made. That is, C glass was melted at 1200 ° C., blown into a cylindrical shape, stretched into a thin film, and cooled and solidified to obtain a thin piece having a predetermined thickness. This was crushed and classified to have a predetermined thickness, particle size, and aspect ratio.Flake glassWas made. ThatFlake glassIs suspended in a titanyl sulfate solution and the suspension is heated to boiling for 1 hour,Flake glassThe surface was coated with titania of various thicknesses. This is washed with filtered water, dried, and heat-treated at 600 ° C. for 30 minutes to give a pearl tone.Flake glassGot.Glass flake is a registered trademark of Nippon Sheet Glass Co., Ltd.
[0055]
  Color development varies depending on the thickness of titania to be coated. Furthermore, since the specific surface area varies depending on the thickness and particle size of the base material, the coating thickness also varies as a result. For this reason, titania coatingFlake glassThe sample is extracted from the suspension and the amount of titanyl sulfate added is adjusted while observing the color of the suspension.Flake glassGot.
[0056]
  The obtained pearl toneFlake glassThe silica was coated by the following method. That is, pearl toneFlake glass50 g is suspended in 0.5 liters of purified water and kept at 75 ° C. in a water bath, and sodium silicate solution (silica content: 37.1%, Wako Pure Chemical Industries) is used as the silica content to make a pearl tone.Flake glassThe solution was weighed so as to have a predetermined mass%, and diluted 10-fold with purified water was slowly added. At this time, the process was carried out while maintaining the pH of the suspension at 9.2 to 9.4 with 3.5% hydrochloric acid. After the addition, stirring was continued at 75 ° C. for 30 minutes.
[0057]
  Thereafter, the suspension is filtered through a filter paper, and the solid powder is taken out, washed with water to neutralize the pH, dried at 100 ° C. for 2 hours, and then coated with silica.Flake glass for cosmeticsGot.
[0058]
  Pearl-like with various thicknesses, particle sizes, and aspect ratios coated with various mass ratios of silicaFlake glass for cosmeticsWas evaluated by the following method.
  <Boron Elution Amount> Purity test of cosmetic ingredient-specific combination component standard “boron nitride” (4) A test solution was prepared according to the method of elution boron amount and quantitatively analyzed by atomic absorption spectrometry.
[0059]
  The preparation method of the test solution is as follows.
(1) Take 2.5 g of a test sample in a fluororesin beaker, add 10 ml of ethanol and stir well, add 40 ml of water and stir well, then place a fluororesin watch glass and heat on a hot plate for 1 hour. .
(2) After standing to cool, filter, wash the residue with a small amount of water, and combine the washing with the filtrate.
(3) The solution is further filtered through a membrane filter (0.22 μm).
(4) Take the entire amount of the filtrate into a fluororesin beaker, add 1 ml of sulfuric acid, and boil on a hot plate for 10 minutes.
(5) After standing to cool, place this solution in a polyethylene volumetric flask, wash the fluororesin beaker with a small amount of water, match it with a polyethylene volumetric flask, add water to make exactly 50 ml, and use this solution as the test solution. And
[0060]
  <Measurement of color difference and brightness> 5 g of sample was mixed with 45 g of acrylic resin (manufactured by Nippon Paint Co., Ltd., Acrylic Auto Clear Sper) (solid mass), thoroughly stirred and mixed with a paint shaker, and mixed with a 9 mil applicator. The solution was applied onto concealment measurement paper to form a coating film.
[0061]
  The coating film was measured for hue (a value, b value) and lightness (L value) with a Minolta CR300 colorimeter, and a pearl tone not coated with silica.Flake glassThe color difference from (a0, b0, L0) was determined by the following equation.
[0062]
[Chemical 1]
  Color difference ΔE = √ {(a−a0)²+ (B-b0)²+ (L-L0)²}
  Moreover, this coating film was observed visually and the glitter feeling was represented on the following reference | standard.
A: There is a very brilliant glitter
○: There is a glittering radiance.
Δ: Some radiance.
X: Not so bright.
[0063]
  Silica-coated pearl tone produced in this wayFlake glass for cosmeticsAnd pearl-like without silica coatingFlake glassTable 1 shows the measurement results of the boron elution amount. Silica coated pearl toneFlake glass for cosmeticsTable 1 also shows the measurement result of the color difference ΔE.
[0064]
  (Comparative Examples 1-3)
  As a comparative example, it is the same as in Examples 2 and 8 described above, and a pearl tone without silica coating.Flake glass(Comparative Examples 1 and 2) and pearl tone similar to Example 8Flake glassFurther, a pearl tone coated with 50% by mass of silica by the method of the embodiment described above.Flake glassThe measurement results of boron elution amount and color difference ΔE in (Comparative Example 3) are also shown in Table 1.
[0065]
  From Table 1, pearl tone coated with silicaFlake glass for cosmeticsIn all cases, the dissolution amount of boron was n.d. (lower limit of quantification of 0.25 ppm or less), and it was found that no elution was observed. On the other hand, in Comparative Examples 1 and 2 not coated with silica, the boron elution amount exceeds 20 ppm, and the cosmetic component-specific combination component standard “boron nitride” purity test (4) the elution boron amount standard of 20 ppm It is over.
[0066]
  Further, when the silica coating amount is 1 to 30% by mass, the color difference ΔE is 3 or less compared to the case where the silica is not coated, there is no significant hue change, and the original pearl tone.Flake glassCan be used as a pigment. On the other hand, in Comparative Example 3 in which 50% by mass of silica is coated, ΔE is 4.5, and it can be recognized that there is a color difference in appearance. In addition, although it is slight, there is a decrease in glitter. Original pearl toneFlake glassWhen used in a similar formulation, the color will be different.
[0067]
[Table 1]
  Pearl coated with silicaFlake glass for cosmeticsCharacteristics of
───────────────────────────────────
Example 1 2 3 4 5 6
───────────────────────────────────
Average thickness (μm) 2.3 2.3 2.3 1.3 0.4 0.6
Average particle size (μm) 450 80 40 25 40 80
Aspect ratio 196 35 17 19 100 113
Reflective color Silver Silver Silver Yellow Green Green
Silica mass% 1 3 3 3 6 15
Elution amount of boron ppm n.d.n.d.n.d.n.d.n.d.n.d.
Color difference ΔE 0.5 1.3 1.0 1.5 2.0 2.5
Brightness ◎ ◎ ◎ ◎ ◎ ◎
───────────────────────────────────
Example 7 8 Comparative Example 1 2 3
───────────────────────────────────
Average thickness (μm) 2.3 1.3 2.3 1.3 1.3
Average particle size (μm) 450 80 80 80 80
Aspect ratio 196 62 35 62 62
Reflection color Blue Red Silver Red Red
Silica mass% 3 20 0 0 50
Elution amount of boron ppm n.d. n.d. 36 26 n.d.
Color difference ΔE 1.2 2.8--4.5
Brightness ◎ ◎ ◎ ◎ ○
───────────────────────────────────
Note) n.d .: Below the lower limit of quantification (0.25 ppm)
  (Example 9) to (Example 14)
  It was produced by the method of the above-described example.Flake glassIs treated with the following method to create a tin-containing pearl toneFlake glassWas made. That is, C glass having an average thickness of 1.3 μm and an average particle size of 80 μmFlaky glass100 g was added to 1 liter of a 200 ppm solution of stannous chloride dihydrate adjusted to pH 2 with dilute hydrochloric acid, stirred for 10 minutes, and filtered. Next, to 1 liter of a hexachloroplatinic acid hexahydrate 15 ppm solution,Flake glassAnd stirred for 10 minutes and then filtered.
[0068]
  Subsequently, the above treatment was applied to 1 liter of an aqueous solution having a pH of about 1 with hydrochloric acid.Flake glassAnd the solution temperature was raised to 75 ° C. A titanium tetrachloride (TiCl4) solution was slowly added thereto to coat titanium oxide. At this time, sodium hydroxide was added as appropriate so that the pH did not change. Then, it is washed with filtered water, dried, and further heat treated at 600 ° C. for 30 minutes to give a pearl toneFlake glass for cosmeticsGot. In this method, rutile type titania was precipitated.
[0069]
  For the same reason as described in the above-described embodiment, the titania coating is appropriately used.Flake glassThe sample is sampled from the suspension and the amount of titanium tetrachloride added and subtracted while observing the color of the sample is adjusted to a pearl tone of any color.Flake glass for cosmeticsGot.
[0070]
  The obtained pearl toneFlake glass for cosmeticsIs coated with silica in the same manner as in Example 1, and the boron elution amount, tin elution amount (measurement method is as follows), and pearl tone when silica is not coated.Flake glassThe color difference was measured and the glitter was observed. The results are shown in Table 2.
[0071]
  <Tin Elution Amount> Composition Standards by Cosmetic Variety “Glass Powder” Purity Test (3) A test solution was prepared according to the lead method, and quantitatively analyzed by ICP. That is, take 1.0 g of sample, add 30 ml of water and 3 ml of hydrochloric acid, boil for 20 minutes, and then filter. The residue was washed with a small amount of water, and the washing was combined with the filtrate. This was used as a test solution and quantitatively analyzed by ICP.
[0072]
  (Comparative Example 4) to (Comparative Example 6)
  As a comparative example, it is the same as in Examples 10 and 13 described above, and a pearl tone without silica coating.Flake glass(Comparative Examples 4 and 5) and the same pearl as in Example 13 described above, and 50% by mass silica coated with the method of the above-described Example.Flake glass for cosmeticsThe results of measuring boron elution amount, tin elution amount, color difference ΔE, and glitter in (Comparative Example 6) are also shown in Table 2.
[0073]
  From the table, pearl tone coated with silicaFlake glass for cosmeticsAll have a boron elution amount of n. d. (The lower limit of quantification was 0.25 ppm or less), and it was found that no elution was observed. On the other hand, in Comparative Examples 4 and 5 that are not coated with silica, the boron elution amount exceeds 20 ppm, and the cosmetic component-specific combination component standard “boron nitride” purity test (4) the elution boron amount standard of 20 ppm It is over.
[0074]
  In addition, the amount of tin eluted is a pearl tone coated with silica.Flake glass for cosmeticsIs 8-15 ppm, silicaCoatingIt was found that the amount of elution was considerably prevented while Comparative Examples 4 and 5 which were not performed exceeded 20 ppm.
[0075]
  Further, when the silica coating amount is 1 to 30% by mass, the color difference ΔE is 3 or less compared to the case where silica is not coated, there is no large hue change, and the original pearl tone.Flake glassCan be used as a pigment. On the other hand, in Comparative Example 3 in which 50% by mass of silica is coated, ΔE is 4.1, and it can be recognized that there is a color difference in appearance. Original pearl toneFlake glassWhen used in a similar formulation, the color will be different.
[0076]
[Table 2]
  Properties of tin-containing titania-coated cosmetic flake glass with various shapes
───────────────────────────────────
Example 9 10 11 12 13 14
───────────────────────────────────
Average thickness (μm) 2.3 2.3 2.3 1.3 1.3 0.6
Average particle size (μm) 450 80 40 25 80 80
Aspect ratio 196 35 17 19 62 113
Reflective color Silver Silver Silver Yellow Red Green
Silica mass% 1 3 3 3 6 15
Elution amount of boron ppm n.d.n.d.n.d.n.d.n.d.n.d.
Elution amount of tin ppm 8 6 6 15 12 18
Color difference ΔE 0.4 1.0 1.0 1.3 1.8 2.6
Brightness ◎ ◎ ◎ ◎ ◎ ◎
───────────────────────────────────
Comparative Example 4 5 6
───────────────────────────────────
Average thickness (μm) 2.3 1.3 1.3
Average particle size (μm) 80 80 80
Aspect ratio 35 62 62
Reflective color Silver Red Red
Silica mass% 0 0 50
Elution amount of boron ppm 33 28 n.d.
Elution amount of tin ppm 22 26 11
Color difference ΔE − − 4.1
Brightness ◎ ◎ ○
───────────────────────────────────
Note) n.d .: Lower than the lower limit of quantification (0.25 ppm)under
[0082]
  Then coated with metal oxideFlake glass for cosmetics(Pearl toneFlake glass) Is described below as a pearlescent pigment. The evaluation of the cosmetics was carried out by 10 panelists who performed sensory evaluations in 5 stages of 1 to 5 for the items in Table 3.
[0083]
[Table 3]
  ───────────────────────────────────
\ Evaluation item Nod stickiness Smoothness Brightness Color cleanliness
Evaluation \
───────────────────────────────────
1 bad no no no dirty
2 Somewhat bad Somewhat not Somewhat not much Not much
3 Normal Normal Normal Somewhat normal
4 Somewhat good Somewhat some Some pretty
5 good very very very high very clean
───────────────────────────────────
  The results were expressed as follows in terms of the average value of 10 people's 5-grade evaluation.
◎ ... 4.5 to 5.0
○… 3.5 to 4.5
● 2.5 or more and less than 3.5
Δ: 1.5 or more and less than 2.5
X: 1.0 or more and less than 1.5
  (Example 17: Powder foundation)
  The powder foundation which consists of each component shown below was prepared.
(1) Titanium oxide 7
(2) Talc 20
(3) muscovite 3
(4) Pearl tone of Example 2Flake glass55
(5) Nylon powder 2
(6) Red iron oxide 0.5
(7) Yellow iron oxide 1
(8) Black iron oxide 0.1
(9) Silicon oil 1
(10) 2-ethylhexyl valmitate 9
(11) Sorbitan sesquioleate 1
(12) Preservative 0.3
(13) Fragrance 0.1 (mass%)
  Components (1) to (8) are mixed with a Henschel mixer, and the components (9) to (13) are mixed by heating, dissolving and mixing with the mixture, and then pulverized with a pulverizer. 0.1568Pa (= 160kg / cm in a 3mm dish²) To obtain a powder foundation.
[0084]
  (Comparative Example 7)
  In the formulation of Example 17, the pearl tone of component (4)Flake glassThe pearl tone of Comparative Example 1Flake glassAs a comparative example 7, it was produced in the same manner as in Example 17. Table 17 shows sensory test results of Example 17 and Comparative Example 7.4Shown in
[0085]
  table4Thus, the powder foundation according to the present invention has a pearl tone that is not coated with silica in all aspects.Flake glassIt was found that there was no difference with the powder foundation containing, and it was excellent in spreading, adhesion, smoothness, radiance, and clean color.
[0086]
[Table 4]
  ───────────────────────────────────
              Nozomi Cohesion Smoothness Brightness Color cleanliness
Example 17 ○ ○ ○ ◎ ◎
Comparative Example 7 ○ ○ ○ ◎ ◎
───────────────────────────────────
  (Example 18: Brusher)
  A blusher comprising the following components was prepared.
(1) Talc 12.6
(2) Mica 8.1
(3) Mica 25.4
(4) Pearl tone of Example 2Flake glass45.0
(5) Red No. 226 0.4
(6) Squalane 3.0
(7) 2-ethylhexyl palmitate 5.0
(8) Preservative 0.3
(9) Fragrance 0.2 (mass%)
  Ingredients (1) to (5) are mixed with a Henschel mixer, and components obtained by dissolving and mixing ingredients (6) to (9) are sprayed on the mixture and further mixed, then pulverized by a pulverizer and 4 × 6 cm. 0.1176Pa (= 120kg / cm on the pan)²) To obtain a blusher according to the present invention.
[0087]
  (Comparative Example 8)
  In the formulation of Example 18, the pearl tone of component (4)Flake glassThe pearl tone of Comparative Example 1Flake glassAs a comparative example 8, it was produced in the same manner as in Example 18. Table 5 shows the results of the sensory test of Example 18 and Comparative Example 8.
[0088]
  From Table 5, it can be seen that the blusher according to the present invention has a pearl tone not coated with silica on all sides.Flake glassIt was found that there is no difference from the brusher containing, and it is excellent in stretch, adhesion, smoothness, radiance, and color cleanliness.
[0089]
[Table 5]
  ───────────────────────────────────
                Nozomi Cohesion Smoothness Brightness Color cleanliness
───────────────────────────────────
Example 18 ○ ○ ○ ◎ ◎
Comparative Example 8 ○ ○ ○ ◎ ◎
───────────────────────────────────
  (Example 19: Nail enamel)
  A nail enamel consisting of the following components was prepared.
(1) Nitrocellulose 12
(2) Modified alkyd resin 12
(3) Acetyltributyl citrate 5
(4) n-butyl acetate 36.4
(5) Ethyl acetate 6
(6) n-butyl alcohol 2
(7) Toluene 21
(8) Iron oxide pigment 0.5
(9) Titanium dioxide 0.1
(10) Pearl tone of Example 8Flake glass3
(11) Mica 1
(12) Organic modified montmorillonite 1 (mass%)
  Components (1) to (7) (wherein component (4) is a part) are dissolved, and the mixture of component (12) and the rest of component (4) in a gel form is added and mixed, Furthermore, components (8) to (11) were added and mixed, and filled in a container to obtain a nail enamel according to the present invention.
[0090]
  (Comparative Example 9)
  In the formulation of Example 19, the pearl tone of component (10)Flake glassThe pearl tone of Comparative Example 5Flake glassAs a comparative example 9, it was produced in the same manner as in Example 19. Table 19 shows the results of the sensory test of Example 19 and Comparative Example 9.6Shown in
[0091]
  From Table 6, the nail enamel according to the present invention is pearl-like without silica coating on all sides.Flake glassIt was found that there is no difference from the nail enamel blended with, and it is excellent in stretch, adhesion, smoothness, radiance, and clean color.
[0092]
[Table 6]
  ───────────────────────────────────
                Nozomi Cohesion Smoothness Brightness Color cleanliness
───────────────────────────────────
Example 19 ○ ○ ◎ ◎ ◎
Comparative Example 9 ○ ○ ◎ ◎ ◎
───────────────────────────────────
[0093]
【The invention's effect】
  As is clear from the above explanation, on the surface of the flaky glass,A functional film made of titania is formed on it.SiriMosquitoBy forming the glass component elution preventing coating, it was possible to prevent elution of the glass component of the cosmetic flake glass. In particular, the boron elution amount could be reduced to 0.25 ppm or less. In addition, elution of tin used in forming the titania coating could be prevented.
[0094]
  Therefore, according to the present inventionFlake glass for cosmeticsCan be used as a safe material. And thisFlake glass for cosmeticsAs a cosmetic ingredient,Flake glassA cosmetic with no dullness, clear color development, no roughness, excellent skin feel and adhesion.

Claims (7)

The surface to form a functional film made of titania to form a glass component elution preventing coating by silica mosquito thereon, if the boron elution volume together with or less 0.25 ppm, does not form a glass component elution preventing coating A flaky glass for cosmetics , having a color difference ΔE of 3 or less and a pearly color tone . In the flaky glass for cosmetics according to claim 1,
The said coating is flake shaped glass for cosmetics by which 0.1-30% is coat | covered with the mass% with respect to flake shaped glass before a coating | coated. In the flaky glass for cosmetics according to claim 1,
The said coating is flake shaped glass for cosmetics by which 0.5-25% is coat | covered with the mass% with respect to the flake shaped glass before a coating | coated. In the flaky glass for cosmetics according to claim 1,
The coating is a flake glass for cosmetics, which is coated at 1% to 20% by mass with respect to the flake glass before coating. In the flaky glass for cosmetics according to claim 1,
The coating is a flaky glass for cosmetics formed by a metal salt method . The flaky glass for cosmetics according to claim 1, wherein the flaky glass has an average thickness of 0.1 to 2.5 µm, an average particle diameter of 1 to 300 µm, and an aspect ratio of 10 to 500. Flaked glass. However, the aspect ratio is defined as average particle diameter / average thickness. A cosmetic comprising the flaky glass for cosmetics according to any one of claims 1 to 6.