JP2013221000A - Spherical cellulose powder and cosmetic including the same - Google Patents
Spherical cellulose powder and cosmetic including the same Download PDFInfo
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本発明は、球状セルロース粉体と、その球状セルロース粉体を含有する化粧料に関するものである。 The present invention relates to a spherical cellulose powder and a cosmetic containing the spherical cellulose powder.
従来、セルロースパウダーは各種の製法で製造され（例えば特許文献１参照。）、主に感触改善の目的で、化粧料などに幅広く配合されている。
また、ファンデーション等の化粧料においては、カバー力、毛穴ぼかし効果、素肌感・透明感、滑らかな密着感において優れた効果を発揮することが求められる。このために、これまでセルロースパウダーに酸化チタンを内包させて光散乱性を持たせて隠蔽効果を発揮させる試みなどがなされている（特許文献２参照。）。
Conventionally, cellulose powder has been produced by various production methods (see, for example, Patent Document 1), and has been widely blended in cosmetics and the like mainly for the purpose of improving touch.
In addition, cosmetics such as foundations are required to exhibit excellent effects in covering power, pore blurring effect, skin feeling / transparency, and smooth adhesion. For this reason, attempts have been made to encapsulate titanium oxide in cellulose powder to impart light scattering properties and exert a concealing effect (see Patent Document 2).
上記セルロースパウダーについては、皮膚の小皺や毛穴を目立たなくしたり、唇の縦皺を目立たなくするといった、よりソフトフォーカス効果の優れた製品の開発が望まれているところである。 Regarding the cellulose powder, it is desired to develop a product with a more excellent soft focus effect, such as making the skin wrinkles and pores inconspicuous and making the lips vertical wrinkles inconspicuous.
本発明は、前述のような事情に鑑みてなされたもので、よりソフトフォーカス効果に優れた球状セルロース粉体を提供するとともに、この球状セルロース粉体を含有することにより、カバー力、毛穴ぼかし効果、素肌感・透明感、滑らかな密着感において優れた効果を発揮する化粧料を提供することを目的とするものである。 The present invention has been made in view of the circumstances as described above, and provides a spherical cellulose powder having a more excellent soft focus effect, and by containing the spherical cellulose powder, the covering power and pore blurring effect. An object of the present invention is to provide a cosmetic that exhibits an excellent effect in the feeling of skin, transparency, and smooth adhesion.
本発明者らは鋭意研究を重ねた結果、球状セルロース粉体の平均粒子径を５μｍ以下にコントロールし、全粒子の９０体積％以上の粒子の一次粒子径を２〜７μｍの範囲にし、且つ球形の最長径と最短径の比率（最長径／最短径）を１．０〜２．５の範囲にすることで、素肌感・透明感、肌への密着感に優れ、光の拡散性に優れるため、カバー力、毛穴ぼかし効果を付与できることを見出し、本発明を完成させるに至った。 As a result of intensive studies, the inventors have controlled the average particle size of the spherical cellulose powder to 5 μm or less, set the primary particle size of 90% by volume or more of all particles to a range of 2 to 7 μm, and spherical. By setting the ratio of the longest diameter to the shortest diameter (longest diameter / shortest diameter) in the range of 1.0 to 2.5, the skin feel / transparency, the close contact with the skin is excellent, and the light diffusibility is excellent. Therefore, the present inventors have found that the covering power and pore blurring effect can be imparted, and have completed the present invention.
要するに、前記目的を達成するために、第１発明による球状セルロース粉体は、
平均粒子径が５μｍ以下で、全粒子の９０体積％以上の粒子の一次粒子径が２〜７μｍの範囲にあり、球形の最長径と最短径の比率（最長径／最短径）が１．０〜２．５の範囲であり、２０質量％のシリコンオイルペーストのヘイズ値が７０％以上で、且つ全透過光率が９５％以上であることを特徴とするものである。
In short, in order to achieve the above object, the spherical cellulose powder according to the first invention is:
The average particle diameter is 5 μm or less, the primary particle diameter of 90% by volume or more of all particles is in the range of 2 to 7 μm, and the ratio of the longest diameter to the shortest diameter of the sphere (longest diameter / shortest diameter) is 1.0. The haze value of the silicon oil paste of 20% by mass is 70% or more, and the total transmittance is 95% or more.
第２発明による化粧料は、第１発明に係る球状セルロース粉体を含有してなることを特徴とするものである。 The cosmetic according to the second invention is characterized by containing the spherical cellulose powder according to the first invention.
第１発明によれば、球状セルロース粉体の平均粒子径を５μｍ以下、全粒子の９０体積％以上の粒子の一次粒子径を２〜７μｍの範囲にコントロールし、且つ球形の最長径と最短径の比率（最長径／最短径）を１．０〜２．５の範囲にコントロールすることで、２０質量％のシリコンオイルペーストのヘイズ値が７０％以上で、且つ全透過光率が９５％以上となり、ソフトフォーカス効果に優れた粉体を得ることが可能となる。 According to the first invention, the spherical cellulose powder has an average particle diameter of 5 μm or less, a primary particle diameter of 90% by volume or more of all particles is controlled within a range of 2 to 7 μm, and a spherical longest diameter and shortest diameter. By controlling the ratio (longest diameter / shortest diameter) in the range of 1.0 to 2.5, the haze value of 20% by mass of the silicone oil paste is 70% or more and the total transmittance is 95% or more. Thus, it is possible to obtain a powder having an excellent soft focus effect.
第２発明によれば、第１発明の球状セルロース粉体を含有することにより、素肌感・透明感、肌への密着感に優れ、カバー力、毛穴ぼかし効果に優れた化粧料を得ることができる。 According to the second invention, by containing the spherical cellulose powder of the first invention, it is possible to obtain a cosmetic material that is excellent in feeling of skin, transparency, and adhesion to the skin, and excellent in covering power and pore blurring effect. it can.
次に、本発明による球状セルロース粉体及びそれを含有する化粧料の具体的な実施の形態について説明する。 Next, specific embodiments of the spherical cellulose powder and the cosmetics containing it according to the present invention will be described.
本発明による球状セルロース粉体を作製するには、次の手順が採られる。
１）アルカリ性のアニオン性高分子水溶液に、合一防止剤として炭酸カルシウムスラリーを混合し、良く攪拌する。
２）ビスコースと上記１）の水溶液とを混合し、ビスコースの微粒子分散液を生成する。
３）上記２）のビスコースの微粒子分散液を加熱し、この分散液中のビスコースを凝固させ、次いで酸で中和して、セルロース微粒子を生成する。
４）上記セルロース微粒子を母液から分離し、必要に応じて水洗及び乾燥させる。
In order to produce the spherical cellulose powder according to the present invention, the following procedure is adopted.
1) A calcium carbonate slurry is mixed with an alkaline anionic polymer aqueous solution as a coalescence inhibitor and stirred well.
2) Viscose and the aqueous solution of 1) above are mixed to produce a fine particle dispersion of viscose.
3) The fine particle dispersion of viscose of 2) is heated to coagulate the viscose in the dispersion, and then neutralized with an acid to produce cellulose fine particles.
4) The cellulose fine particles are separated from the mother liquor, washed with water and dried as necessary.
ここで、ビスコースはセルロースの原料であり、ガンマ価３０〜１００質量％、アルカリ濃度４〜１０質量％のものが最適に用いられる。また、前記水溶性のアニオン性高分子としては、例えばポリアクリル酸ソーダ、ポリスチレンスルホン酸ソーダ等が挙げられる。合一防止剤として使用する炭酸カルシウムは、分散液中のビスコース微粒子同士の合一を防ぎ、セルロース微粒子の粒子径を小さくする効果がある。このようにして得られた球状セルロース粉体におけるセルロースの結晶形状はセルロースＩＩ型であった。 Here, viscose is a raw material of cellulose, and those having a gamma value of 30 to 100% by mass and an alkali concentration of 4 to 10% by mass are optimally used. Examples of the water-soluble anionic polymer include sodium polyacrylate and sodium polystyrene sulfonate. Calcium carbonate used as a coalescence inhibitor has the effect of preventing the coalescence of viscose fine particles in the dispersion and reducing the particle size of the cellulose fine particles. The crystal form of cellulose in the spherical cellulose powder thus obtained was cellulose type II.
本発明で用いられる炭酸カルシウムスラリーの例としては、奥多摩工業社製のタマパールＴＰ−２２１ＧＳを挙げることができる。 An example of the calcium carbonate slurry used in the present invention is Tama Pearl TP-221GS manufactured by Okutama Kogyo Co., Ltd.
本発明の球状セルロース粉体は、平均一次粒子径が５μｍ以下の範囲であり、最大粒子径が１５μｍ以下の範囲であるのが好ましく、特に平均一次粒子径が２〜５μｍの範囲で、全粒子の９０体積％以上の粒子の一次粒子径が２〜７μｍの範囲にあるのが好ましい。この範囲であれば、目的の光学効果が効果的に得られるメリットがある。平均一次粒子径が２μｍより小さい場合には、生産効率が悪くなるためコストがかかるという懸念がある。一方、平均一次粒子径が５μｍより大きい場合には、光の拡散効果が劣るために充分な光学効果が得られないという懸念がある。 The spherical cellulose powder of the present invention has an average primary particle diameter in the range of 5 μm or less, preferably a maximum particle diameter in the range of 15 μm or less, particularly in the range of the average primary particle diameter of 2 to 5 μm, It is preferable that the primary particle diameter of the 90% by volume or more particles is in the range of 2 to 7 μm. If it is this range, there exists a merit which the target optical effect is acquired effectively. When the average primary particle size is smaller than 2 μm, there is a concern that the production efficiency is deteriorated and the cost is increased. On the other hand, when the average primary particle size is larger than 5 μm, there is a concern that a sufficient optical effect cannot be obtained because the light diffusion effect is poor.
本発明において、球状セルロース粉体の一次粒子径の測定方法としては、電子顕微鏡により観察した写真から画像的に抽出、判定する方法と、レーザー回折式粒度分布計などの粒度分布測定装置を用いて測定する方法などが挙げられるが、レーザー回折式粒度分布計による測定方法を用いるのがより好ましい。 In the present invention, as a method for measuring the primary particle size of the spherical cellulose powder, a method of image-wise extraction and determination from a photograph observed with an electron microscope, and a particle size distribution measuring device such as a laser diffraction particle size distribution meter are used. Although the method of measuring etc. is mentioned, It is more preferable to use the measuring method by a laser diffraction type particle size distribution meter.
本発明において、球状セルロース粉体のソフトフォーカス機能の評価方法として、へイズ・透過率計、変角分光測色システム、三次元変角光度計を挙げることができるが、へイズ・透過率計により透過光率、拡散透過光率を測定する方法を用いるのが好ましい。 In the present invention, examples of the method for evaluating the soft focus function of the spherical cellulose powder include a haze / transmittance meter, a variable angle spectrophotometric system, and a three-dimensional variable angle photometer. It is preferable to use a method of measuring the transmitted light rate and the diffuse transmitted light rate.
本発明の球状セルロース粉体には、それ自体従来公知の各種の表面処理を施すことができる。この表面処理の例としては、以下の処理が挙げられる。なお、これらの処理を複数組み合わせて用いることも可能である。
ａ）フッ素化合物処理・・・パーフルオロアルキルリン酸エステル処理やパーフルオロアルキルシラン処理、パーフルオロポリエーテル処理、フルオロシリコーン処理、フッ素化シリコーン樹脂処理など
ｂ）シリコーン処理・・・メチルハイドロジェンポリシロキサン処理、ジメチルポリシロキサン処理、気相法テトラメチルテトラハイドロジェンシクロテトラシロキサン処理など
ｃ）ペンダント処理・・・気相法シリコーン処理後にアルキル鎖などを付加する処理
ｄ）シランカップリング剤処理
ｅ）チタンカップリング剤処理
ｆ）アルミニウムカップリング剤処理
ｇ）油剤処理
ｈ）Ｎ−アシル化リジン処理
ｉ）ポリアクリル酸処理
ｊ）金属石鹸処理・・・ステアリン酸塩処理やミリスチン酸塩処理など
ｋ）アクリル樹脂処理
ｌ）金属酸化物処理
The spherical cellulose powder of the present invention can be subjected to various surface treatments known per se. Examples of this surface treatment include the following treatments. A combination of these processes can also be used.
a) Fluorine compound treatment: perfluoroalkyl phosphate treatment, perfluoroalkylsilane treatment, perfluoropolyether treatment, fluorosilicone treatment, fluorinated silicone resin treatment, etc. b) Silicone treatment: methyl hydrogen polysiloxane Treatment, dimethylpolysiloxane treatment, vapor phase tetramethyltetrahydrogencyclotetrasiloxane treatment, etc. c) pendant treatment: treatment to add alkyl chain after vapor phase silicone treatment d) silane coupling agent treatment e) titanium Treatment with coupling agent f) Treatment with aluminum coupling agent g) Treatment with oil agent h) Treatment with N-acylated lysine i) Treatment with polyacrylic acid j) Treatment with metal soap ... Treatment with stearate or myristate k) Acrylic Resin treatment l) Metal oxide Management
本発明の球状セルロース粉体は、化粧料に配合することにより、感触が良く、透明感や肌と同じような質感があり、肌の凹凸、小皺、しみを目立たなくする効果がある化粧料を得ることができる。この場合、配合量としては、０．１〜１００質量％が好ましく、より好ましくは０．５〜６０質量％である。化粧料の剤型としては、二層状、油中水型エマルジョン、水中油型エマルジョン、ジェル状、スプレー、ムース状、油性、固形状等の従来公知の剤型を使用することができる。勿論、本発明の化粧料を得るのに、他の公知の着色顔料、体質顔料、樹脂粉体、光輝性粉体、又はそれらの粉体の表面処理粉体と、界面活性剤、油剤を組み合わせることができるのは言うまでもない。 The spherical cellulose powder of the present invention is a cosmetic that has a good touch, a feeling of transparency and a texture similar to the skin, and has an effect of making the unevenness, wrinkles and stains of the skin inconspicuous by blending into the cosmetic. Can be obtained. In this case, as a compounding quantity, 0.1-100 mass% is preferable, More preferably, it is 0.5-60 mass%. As the cosmetic dosage form, conventionally known dosage forms such as a bilayer, a water-in-oil emulsion, an oil-in-water emulsion, a gel, a spray, a mousse, an oil, and a solid can be used. Of course, in order to obtain the cosmetic of the present invention, other known color pigments, extender pigments, resin powders, glitter powders, or surface-treated powders thereof are combined with surfactants and oils. Needless to say, you can.
次に、本発明による球状セルロース粉体及びそれを含有する化粧料の具体的な実施例について説明する。なお、本発明は、以下に述べる実施例に限定されるものではない。 Next, specific examples of the spherical cellulose powder and the cosmetics containing it according to the present invention will be described. In addition, this invention is not limited to the Example described below.
（製造実施例：平均一次粒子径２〜５μｍの球状セルロース粉体の製造例）
ビスコース（セルロース濃度９．５質量％、ガンマ価５０、アルカリ濃度５質量％）１３０質量部と、ポリアクリル酸ソーダ溶液（重合度１２万）の１０質量％水溶液７３０質量部と、炭酸カルシウム５０質量部を室温下で３０分間、１８００ｒｐｍで混合した後に、２０分間かけて８０℃に昇温し、さらに３０分間・８０℃にて混合し、凝固粒子を得た。この凝固粒子をガラスフィルターにてろ過し、０．５質量％塩酸にて中和し、過剰の水とイソプロピルアルコールで洗浄した後に、減圧下で乾燥させて球状セルロース粉体を得た。得られたた球状セルロース粉体をレーザー回折式粒度分布計で測定した結果、平均一次粒子径が３．９μｍで、全粒子の９０体積％以上の粒子の一次粒子径が２〜６μｍの範囲であった。
(Production Example: Production Example of Spherical Cellulose Powder with an Average Primary Particle Diameter of 2 to 5 μm)
130 parts by mass of viscose (cellulose concentration 9.5% by mass, gamma value 50, alkali concentration 5% by mass), 730 parts by mass of a 10% by mass aqueous solution of sodium polyacrylate solution (polymerization degree 120,000), and 50% calcium carbonate Mass parts were mixed at 1800 rpm for 30 minutes at room temperature, then heated to 80 ° C. over 20 minutes, and further mixed at 80 ° C. for 30 minutes to obtain solidified particles. The coagulated particles were filtered with a glass filter, neutralized with 0.5% by mass hydrochloric acid, washed with excess water and isopropyl alcohol, and then dried under reduced pressure to obtain spherical cellulose powder. As a result of measuring the obtained spherical cellulose powder with a laser diffraction particle size distribution meter, the average primary particle diameter was 3.9 μm, and the primary particle diameter of 90% by volume or more of all particles was in the range of 2 to 6 μm. there were.
（製造比較例：平均一次粒子径１０〜１３μｍの球状セルロース粉体の製造例）
ビスコース（セルロース濃度９．５質量％、ガンマ価５０、アルカリ濃度５質量％）１３０質量部と、ポリアクリル酸ソーダ溶液（重合度１２万）の１０質量％水溶液３９０質量部と、炭酸カルシウム１４質量部を室温下で３０分間、３００ｒｐｍで混合した後に、２０分間かけて８０℃に昇温し、さらに３０分間・８０℃にて混合し、凝固粒子を得た。この凝固粒子をガラスフィルターにてろ過し、０．５質量％塩酸にて中和し、過剰の水とイソプロピルアルコールで洗浄した後に、減圧下で乾燥させて球状セルロース粉体を得た。得られた球状セルロース粉体をレーザー回折式粒度分布計で測定した結果、平均一次粒子径が１２．５μｍであった。
(Production comparative example: Production example of spherical cellulose powder having an average primary particle diameter of 10 to 13 μm)
130 parts by mass of viscose (cellulose concentration 9.5% by mass, gamma value 50, alkali concentration 5% by mass), 390 parts by mass of a 10% by mass aqueous solution of sodium polyacrylate solution (polymerization degree 120,000), 14 calcium carbonate Mass parts were mixed at 300 rpm for 30 minutes at room temperature, then heated to 80 ° C. over 20 minutes, and further mixed at 80 ° C. for 30 minutes to obtain solidified particles. The coagulated particles were filtered with a glass filter, neutralized with 0.5% by mass hydrochloric acid, washed with excess water and isopropyl alcohol, and then dried under reduced pressure to obtain spherical cellulose powder. As a result of measuring the obtained spherical cellulose powder with a laser diffraction particle size distribution analyzer, the average primary particle size was 12.5 μm.
（実施例１：パウダーファンデーション）
下記に示す処方に従ってパウダーファンデーションを得た。
(Example 1: Powder foundation)
A powder foundation was obtained according to the formulation shown below.
（比較例１：パウダーファンデーション）
製造実施例で作製した球状セルロース粉体（平均一次粒子径：３．９μｍ）を、製造比較例で作製した球状セルロース粉体（平均一次粒子径：１２．５μｍ）に変えた以外は、実施例１と同様にしてパウダーファンデーションを得た。
(Comparative Example 1: Powder Foundation)
Except that the spherical cellulose powder (average primary particle size: 3.9 μm) produced in the production example was changed to the spherical cellulose powder (average primary particle size: 12.5 μm) produced in the production comparative example, Example A powder foundation was obtained in the same manner as in 1.
（比較例２：パウダーファンデーション）
製造実施例で作製した球状セルロース粉体（平均一次粒子径：３．９μｍ）を、球状ＰＭＭＡ粉体（平均一次粒子径：６．８μｍ）に変えた以外は、実施例１と同様にしてパウダーファンデーションを得た。
(Comparative Example 2: Powder Foundation)
A powder similar to that of Example 1 except that the spherical cellulose powder (average primary particle size: 3.9 μm) produced in the production example was changed to a spherical PMMA powder (average primary particle size: 6.8 μm). I got a foundation.
（比較例３：パウダーファンデーション）
製造実施例で作製した球状セルロース粉体（平均一次粒子径：３．９μｍ）を、チタニウムアルミナ粉体（平均粒子径：２．０μｍ）に変えた以外は、実施例１と同様にしてパウダーファンデーションを得た。
(Comparative Example 3: Powder Foundation)
Powder foundation in the same manner as in Example 1 except that the spherical cellulose powder (average primary particle size: 3.9 μm) prepared in the production example was changed to titanium alumina powder (average particle size: 2.0 μm). Got.
以下、球状セルロース粉体及び化粧料の評価を示す。
（１）ヘイズ値の測定
得られた球状セルロース粉体０．４ｇを、東レ・ダウコーニング社からＳＦ８４１７の名称で市販されているシリコーン１．６ｇに分散させ、フーバーマーラ（１００ｒｐｍ×３回）を用いてペーストを作製した。ガラス板にペーストの膜厚が２５μｍになるよう塗布した試料をヘイズ・透過率計を用いて測定した。ヘイズ値は次式にて表される。
ヘイズ値（以下Ｈと略す。）＝｛拡散透過光率（以下Ｔｄと略す。）／全透過光率（以下Ｔｔと略す。）｝×１００
ここで、Ｔｔの値が大きいほど透過光の量が多いため、透明感があることを示し、Ｔｄの値が大きいほど散乱光が多いため、ぼかし効果が高いことを示し、Ｈの値が大きいほどソフトフォーカス効果があることを示している。
Hereinafter, evaluation of spherical cellulose powder and cosmetics will be shown.
(1) Measurement of haze value 0.4 g of the obtained spherical cellulose powder was dispersed in 1.6 g of silicone marketed under the name SF8417 from Toray Dow Corning, and Hoover Mara (100 rpm × 3 times) was dispersed. A paste was prepared. A sample coated on a glass plate so that the film thickness of the paste was 25 μm was measured using a haze / transmittance meter. The haze value is expressed by the following formula.
Haze value (hereinafter abbreviated as H) = {diffuse transmittance (hereinafter abbreviated as Td) / total transmittance (hereinafter abbreviated as Tt)} × 100
Here, the greater the value of Tt, the greater the amount of transmitted light, indicating that there is a sense of transparency. The greater the value of Td, the greater the amount of scattered light, indicating that the blurring effect is high, and the value of H is large. It shows that there is a soft focus effect.
（２）パウダーファンデーションの評価
女性パネラー１０名に、パウダーファンデーションを使用してもらい、透明感・ソフトフォーカス感をアンケート形式で回答してもらった。評価が悪い場合を０点、評価が良い場合を５点とし、パネラーの平均点数で評価結果とした。したがって点数が高いほど評価が優れていることを示している。
(2) Evaluation of powder foundation Ten female panelists were asked to use the powder foundation and asked them to answer the question of transparency and soft focus in a questionnaire format. When the evaluation was poor, 0 points were given, and when the evaluation was good, 5 points, and the average score of the panelists was used as the evaluation result. Therefore, the higher the score, the better the evaluation.
表２の結果から、製造実施例で作製した球状セルロース粉体（平均一次粒子径：３．９μｍ）の全透過光率Ｔｔの値は９７．９％であり、製造比較例で作製した球状セルロース粉体（平均一次粒子径：１２．５μｍ）の９８．２％と比較した場合、全透過光率の値がほぼ同じ値となり、どちらも透明感に優れていることが示唆された。また、製造実施例の拡散透過光率は８３．３％であり、製造比較例の３２．５％と比較した場合、拡散透過光率の値が非常に高いため、小皺やしみをぼかす効果に優れていることが判った。また、製造実施例のヘイズ値は８５．１％であり、製造比較例のヘイズ値３３．１％と比較した場合、高い値を示し、ソフトフォーカス機能に優れていることが判った。製造実施例において、平均一次粒子径を小さく制御することにより、透明感を保持しつつ、光の拡散性が向上できると考えられる。 From the results of Table 2, the value of the total transmittance Tt of the spherical cellulose powder (average primary particle size: 3.9 μm) produced in the production example is 97.9%, and the spherical cellulose produced in the production comparative example When compared with 98.2% of the powder (average primary particle size: 12.5 μm), the value of the total transmittance was almost the same, suggesting that both are excellent in transparency. In addition, the diffuse transmitted light rate of the manufacturing example is 83.3%, and when compared with 32.5% of the manufactured comparative example, the value of the diffuse transmitted light rate is very high. It turned out to be excellent. Further, the haze value of the production example was 85.1%, which was high when compared with the haze value of 33.1% of the production comparative example, and it was found that the soft focus function was excellent. In the production examples, it is considered that the light diffusibility can be improved while maintaining the transparency by controlling the average primary particle size to be small.
また、表３の結果から、製造実施例で作製した球状セルロース粉体（平均一次粒子径：３．９μｍ）をパウダーファンデーションに配合した実施例１は、製造比較例で作製した球状セルロース粉体（平均一次粒子径：１２．５μｍ）を配合した比較例１、及びヘイズ値が６０％の球状ＰＭＭＡ粉体を配合した比較例２と比較して、透明感、ソフトフォーカス効果に優れることが判った。実施例１は、肌と同じような自然な化粧仕上がりになり、小皺、しみを目立たなくする効果に優れていた。ヘイズ値が８５％のチタニウムアルミナ粉体を配合した比較例３は、隠蔽性が高くソフトフォーカス効果が見られたが、屈折率が高いため透明感がなく、不自然な化粧仕上がりになった。 In addition, from the results in Table 3, Example 1 in which the spherical cellulose powder (average primary particle size: 3.9 μm) prepared in the manufacturing example was blended in the powder foundation was the spherical cellulose powder ( Compared to Comparative Example 1 in which the average primary particle size was 12.5 μm) and Comparative Example 2 in which spherical PMMA powder having a haze value of 60% was blended, it was found that the transparency and the soft focus effect were excellent. . Example 1 had a natural makeup finish similar to that of the skin, and was excellent in the effect of making the wrinkles and stains inconspicuous. Comparative Example 3 in which titanium alumina powder having a haze value of 85% was blended had a high concealing property and a soft focus effect, but had a high refractive index and no transparency, resulting in an unnatural cosmetic finish.
本発明の球状セルロース粉体は、皮膚の小皺や毛穴を目立たなくしたり、唇の縦皺を目立たなくするといったソフトフォーカス効果に優れていることから、この粉体を配合することで、素肌感・透明感、肌への密着性に優れ、カバー力、毛穴ぼかし効果に優れたパウダーファンデーション等の化粧料を得ることができるので、産業上の利用効果が大である。 Since the spherical cellulose powder of the present invention has an excellent soft focus effect such as making the skin wrinkles and pores inconspicuous and making the lips vertical wrinkles inconspicuous, by blending this powder, Since cosmetics such as powder foundation having excellent transparency, adhesion to skin, covering power, and pore blurring effect can be obtained, the industrial utilization effect is great.
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