JP2004168667A - Cosmetic comprising silica formulated therein - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prepare a cosmetic having makeup persistence, high oxygen permeability of a film, good slip during coating and moistness without greasiness, becoming thick and stiff even at several h after coating. <P>SOLUTION: This cosmetic comprises leaf-like silica secondary particles having self film-forming properties and formulated therein. The silica secondary particles are formed by mutual interfacial parallel orientation of lamellar primary particles of scaly silica and superimposing the plurality of lamellar primary particles. The leaf-like silica secondary particles have 0.001-3 μm thickness and at least ≥10 aspect ratio. A form favorable according to the cosmetic to be formulated such as a powdery form, an aqueous slurry or an organic medium slurry is selected/formulated. <P>COPYRIGHT: (C)2004,JPO

Description

【０１２３】
（ｄ）評価方法
得られたＯ／Ｗ型サンスクリーンクリームの性能試験における評価方法は、以下のとおりである。
【０１２４】
（イ）化粧持続性：
Ｏ／Ｗ型サンスクリーンクリームを塗布して、ガラスプレートに２０μｍの厚みの塗布膜を形成し、室温にて１５分間乾燥後、水流下に１０分間放置後、状態を観察し下記基準により評価した。
【０１２５】
〇：状態変化が見られない。
△：僅かに剥離している。
×：完全に剥離している。
【０１２６】
（ロ）塗布時の伸び：
Ｏ／Ｗ型サンスクリーンクリームによりパネラー１０名による使用テストを行い、下記の＜５段階絶対評価＞を行い、その平均点をさらに下記の＜４段階評価＞にて行った。
【０１２７】
＜５段階絶対評価＞
（評 点）
良 い ： ５ 点、
やや良い ： ４ 点、
普 通 ： ３ 点、
やや悪い ： ２ 点、
悪 い ： １ 点
【０１２８】
＜４段階評価＞
（評点）
◎： ４点以上、
○： ３点以上４点未満、
△： ２点以上３点未満、
×： ２点未満
【０１２９】
（ハ）密閉感：
パネラー１０名による使用テストを行い、塗布後２〜３時間後に各項目について、下記の＜５段階絶対評価＞を行い、その平均点をさらに上記の＜４段階評価＞にて行った。
【０１３０】
＜５段階絶対評価＞
（評 点）
密閉感等が全くない： ６ 点、
密閉感等がない： ５ 点、
密閉感等が普通にある： ３ 点、
密閉感等がややある： ２点、
密閉感等が常にある： １ 点
【０１３１】
（ニ）べとつき：
上記（ハ）と同様に、パネラー１０名による使用テストを行い、同様に評価した。
【０１３２】
（ホ）つっぱり感：
上記（ハ）と同様に、パネラー１０名による使用テストを行い、同様に評価した。
【０１３３】
【表２】

【０１３４】
（ｅ）結果と考察
Ｏ／Ｗ型サンスクリーンクリームのような、一般的にＯ／Ｗ型乳化物は、外相が油相となるｗ／ｏ型より使用性が優れるという利点があるが、一方、外相が水相であるため、汗などによる化粧持続性に問題がある。そのため、化粧持続性を向上させるため、通常皮膜形成性高分子が配合されるが、あまり配合すると密閉感、べとつき、つっぱり感等の使用性が悪化するため、従来、当該使用性との兼ね合いで、十分満足いく量を配合することが出来なかった。
【０１３５】
本発明によれば、かかる皮膜形成性高分子の添加量をあまり増加させなくても、Ｏ／Ｗ型乳化物の使用性での特性を維持したまま、従来の問題点である化粧持続性を改良することが出来ることが確認された。
【０１３６】
また、本発明における葉状シリカ２次粒子は、それ自身皮膜形成性を有するものであり、かつ、当該皮膜は、無機物による皮膜であるため、従来の高分子の皮膜とは異なり、塗布後２〜３時間経過しても、さらっとした仕上がりであり、密閉感、べとつき、つっぱり感がない。
【０１３７】
〔実施例５〕（油性ケーキファンデーション）
参考例３で製造した葉状シリカ２次粒子（粉末）を添加した場合について油性ケーキファンデーションを調製し、評価した。
【０１３８】
（ａ）処方
表３に示す処方に従った。
【０１３９】
（ｂ）製造方法
表３中の配合成分（１）〜（６）を均一に粉砕する。次ぎに配合成分（７）〜（１５）を加熱混合し、成分（１）〜（６）を加え均一に撹拌する。
撹拌物を脱泡後、トレイに流し込み、室温まで徐冷して、目的の油性ケーキファンデーションを得る。
【０１４０】
（ｃ）結果と考察
本発明による油性ケーキファンデーションは、良好な化粧持続性を有し、伸びがよく、かつ、基本的にそれ自身皮膜形成能を有する葉状シリカ２次粒子の皮膜が形成されるため、ワックス皮膜特有の油っぽい使用感がなく、塗布後２〜３時間ご経過しても、密閉感、べとつき、つっぱり感がない、さらっとした仕上がりであった。
【０１４１】
【表３】

【０１４２】
〔実施例６〕（Ｏ／Ｗ型乳化ファンデーション）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合についてＯ／Ｗ型乳化ファンデーションを調製し、評価した。
【０１４３】
（ａ）処方
表４に示す処方に従った。
【０１４４】
（ｂ）製造方法
表４中の配合成分（１）〜（７）を加熱溶融し、これに撹拌混合した成分（８）〜（９）を加え均一に分散する。これに、加熱溶融した成分（１０）〜（１６）を徐々に加えて乳化を行い、室温まで撹拌冷却して、目的のＯ／Ｗ型乳化ファンデーションを得る。
【０１４５】
（ｃ）結果と考察
本発明によるＯ／Ｗ型乳化ファンデーションは、伸びが良く、Ｏ／Ｗ型であるにも関わらず、自己皮膜形成性を有する葉状シリカ２次粒子の無機皮膜による良好な化粧持続性を有し、塗布後２〜３時間後経過しても、密閉感、べとつき、つっぱり感がない、さらっとした仕上がりであった。
【０１４６】
【表４】

【０１４７】
〔実施例７〕（アイライナー）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合についてアイライナーを調製し、評価した。
【０１４８】
（ａ）処方
表５に示す処方に従った。
【０１４９】
（ｂ）製造方法
表５中の配合成分（１）〜（８）を加熱溶融し、これに撹拌混合した成分（９）〜（１０）を加え均一に分散した後、冷却して、目的のアイライナーを得る。
【０１５０】
（ｃ）結果と考察
本発明によるアイライナーは、汗や涙などに対して強固な化粧膜を維持し、伸びが良く、自己皮膜形成性を有する葉状シリカ２次粒子の皮膜により、酢酸ビニル樹脂エマルションの密閉感、べとつき、つっぱり感が改善され、さらっとした仕上がりであった。
【０１５１】
【表５】

【０１５２】
〔実施例８〕（口紅）
参考例３で製造した葉状シリカ２次粒子（粉末）を添加した場合について口紅を調製し、以下の以下のごとく評価した。
【０１５３】
（ａ）処方
表６に示す処方に従った。
【０１５４】
（ｂ）製造方法
表６中の配合成分（１）〜（１１）を加熱溶融混合し均一に撹拌する。
撹拌物を脱泡後、モールドに流し込み、急冷し、目的の口紅を得る。
【０１５５】
（ｃ）結果と考察
本発明による口紅は、衣服やカップなどへ移りにくく、密閉感、べとつき、つっぱり感がなく、さらっとした仕上がりであった。
【０１５６】
【表６】

【０１５７】
〔実施例９〕（溶剤型ネイルエナメル）
参考例４で製造した葉状シリカ２次粒子（ＭＩＢＫ分散液）を添加した場合について溶剤型ネイルエナメルを調製し、評価した。
【０１５８】
（ａ）処方
表７に示す処方に従った。
【０１５９】
（ｂ）製造方法
表７中の配合成分（１）〜（１１）を均一に混合し、これに成分（１２）〜（１７）を添加し均一に分散し、目的の溶剤型ネイルエナメルを得る。
【０１６０】
（ｃ）結果と考察
本発明による溶剤型ネイルエナメルは、ＪＩＳ ５６００の鉛筆強度測定法により鉛筆強度を測定した結果、葉状シリカ２次粒子未配合品と比較し、耐久性が著しく向上することが確認された。また、皮膜形成性の樹脂を配合した場合と異なり、糸引きがないため、伸びが良く、形成した皮膜は、酸素透過性に優れるため、密閉感がなく、さらっとした仕上がりであった。
【０１６１】
【表７】

【０１６２】
〔実施例１０〕（Ｗ／Ｏ型マスカラ）
参考例３で製造した葉状シリカ２次粒子（粉末）を添加した場合についてＷ／Ｏ型マスカラを調製し、評価した。
【０１６３】
（ａ）処方
表８に示す処方に従った。
【０１６４】
（ｂ）製造方法
表８中の配合成分（１）〜（２）を加熱溶融し、これに撹拌混合した成分（３）〜（５）を加え均一に分散する。これに加熱溶融した（６）〜（８）を徐々に加え乳化を行い、室温まで撹拌冷却し、さらに（９）を加え、全体を均一として、目的のＷ／Ｏ型マスカラを得る。
【０１６５】
（ｃ）結果と考察
本発明によるＷ／Ｏ型マスカラは、汗や涙などに対して強固な化粧膜を維持し、伸びが良く、自己皮膜形成性を有する葉状シリカ２次粒子の皮膜により、Ｗ／Ｏ乳化型特有の密閉感、べとつきを改善し、さらっとした仕上がりであった。
【０１６６】
【表８】

【０１６７】
〔実施例１１〕（ヘアジェル）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合について、ヘアジェルを調製し、評価した。
【０１６８】
（ａ）処方
表９に示す処方に従った。
【０１６９】
（ｂ）製造方法
表９中の配合成分（１）、（３）を（１０）の一部に分散させる。また、成分（１０）の残部に、成分（２）、（４）〜（９）を溶解する。両者を撹拌下に混合して目的のヘアジェルを得る。
【０１７０】
（ｃ）結果と考察
本発明によるヘアジェルは、毛髪への伸び及び皮膜形成性の葉状シリカ２次粒子の造膜効果によりヘアスタイリングを維持し、水溶性高分子独特のべとつきを軽減しさらっとした仕上がり感となった。
【０１７１】
【表９】

【０１７２】
〔実施例１２〕（化粧水）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合について、化粧水を調製し、評価した。
【０１７３】
（ａ）処方
表１０に示す処方に従った。
【０１７４】
（ｂ）製造方法
表１０中の配合成分（１）〜（１０）を室温で均一に撹拌・混合し、目的の化粧水を得る。
【０１７５】
（ｃ）結果と考察
本発明による化粧水の基本的な効果は、皮膜形成性を有する葉状シリカ２次粒子の造膜効果による化粧持続性であり、化粧水に配合することで当該葉状シリカ２次粒子の密閉効果と、さらに当該葉状シリカ２次粒子表面シラノール基に若干の水分を保持することで、保水性に優れ、さらっとした仕上がり感となることが確認された。
【０１７６】
【表１０】

【０１７７】
〔実施例１３〕（クリーム）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合について、クリームを調製し、評価した。
【０１７８】
（ａ）処方
表１１に示す処方に従った。
【０１７９】
（ｂ）製造方法
表１１中の配合成分（１）〜（７）を加熱溶融する。これに成分（８）〜（１３）を徐々に添加して乳化し、室温まで冷却して目的のクリームを得る。
【０１８０】
（ｃ）結果と考察
本発明によるクリームは、実施例１２記載の化粧水と同様に、その基本的な効果は、皮膜形成性を有する葉状シリカ２次粒子の造膜効果による化粧持続性であり、クリームに配合することで当該葉状シリカ２次粒子の密閉効果と、さらに当該葉状シリカ２次粒子表面シラノール基に若干の水分を保持することで、保水性に優れ、さらっとした仕上がり感となることが確認された。
【０１８１】
【表１１】

【０１８２】
〔実施例１４〕（ピールオフパック）
参考例２で製造した葉状シリカ２次粒子（水分散液）を添加した場合について、ピールオフパックを調製し、評価した。
【０１８３】
（ａ）処方
表１２に示す処方に従った。
【０１８４】
（ｂ）製造方法
表１２中の配合成分（１）〜（８）を加熱混合する。これに撹拌混合した成分（９）〜（１０）を添加し、均一に分散する。当該分散物に、成分（１１）〜（１３）を加えて加熱溶解後、室温まで冷却する。さらに、成分（１４）を添加して全体を均一にし、目的のピールオフパックを得る。
【０１８５】
（ｃ）結果と考察
本発明によるピールオフパックは、皮膜形成性の葉状シリカ２次粒子の有する造膜効果により、強い皮膜が得られると共に、実施例１２記載の化粧水同様、ピールオフパックに配合することで当該葉状シリカ２次粒子の密閉効果が付与され、また、葉状シリカ２次粒子表面シラノール基に若干の水分を保持することで、保水性に優れ、しっとりした使用感が得られた。
【０１８６】
【表１２】

【０１８７】
〔実施例１５〕（洗顔フォーム）
参考例３で製造した葉状シリカ２次粒子（粉末）を添加した場合について洗顔フォームを調製し、評価した。
【０１８８】
（ａ）処方
表１３に示す処方に従った。
【０１８９】
（ｂ）製造方法
表１３中の配合成分（１）〜（１１）を加熱混合し均一に溶解する。これに成分（１２）〜（１４）を添加し、室温まで冷却する。その後適用な容器に充填し、目的の洗顔フォームを得る。
【０１９０】
（ｃ）結果と考察
本発明による洗顔フォームは、泡立ちが良く、使用性、経時安定性のいずれも良好であった。
【０１９１】
すなわち、本発明による洗顔フォームの基本的な効果は、配合した皮膜形成性の葉状シリカ２次粒子の造膜効果による化粧持続性であるが、さらに配合された当該シリカ２次粒子間の間隙に空気を抱き込み、あわ立ちがよくなるため、洗浄後のヌルツキが少なく、さっぱりとした使用感となった。
【０１９２】
なお、特許文献１には、球状シリカを配合することによる同様の効果が記載されているが、本発明の洗顔フォームのほうがずっと泡立ち使用感共に良好であった。
【０１９３】
【表１３】

【０１９４】
〔実施例１６〕（シャンプー）
参考例３で製造した葉状シリカ２次粒子（粉末）を添加した場合についてシャンプーを調製し、評価した。
【０１９５】
（ａ）処方
表１４に示す処方に従った。
【０１９６】
（ｂ）製造方法
表１４中の配合成分（１）〜（９）を加熱混合し均一に溶解して室温まで冷却し、目的のシャンプーを得る。
【０１９７】
（ｃ）結果と考察
本発明によるシャンプーは、実施例１５の洗顔フォームと同様に泡立ちが良く、使用性、経時安定性のいずれも良好であった。
【０１９８】
すなわち、実施例１５の洗顔フォームと同様に、配合された当該シリカ２次粒子間の間隙に空気を抱き込み、あわ立ちがよくなるため、洗浄後のヌルツキが少なく、さっぱりとした使用感となった。
【０１９９】
なお、特許文献１に球状シリカを配合することによる同様の効果が記載されているが、本発明のシャンプーのほうが泡立ち使用感共に良好であった。
【０２００】
【表１４】

【０２０１】
【発明の効果】
本発明の化粧料には、上記実施例にも示したように、自己造膜性を有する葉状シリカ２次粒子が配合されているため、従来問題となっている皮膜形成性高分子物質特有の密閉感による厚ぼったさ、べとつき、つっぱるなどの使用感が大幅に改善され、本発明に従えば、化粧持続性、使用性に優れた化粧料が提供される。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to cosmetics, and more particularly, has cosmetic persistence, high oxygen permeability of the film, elongation at the time of application, and even after several hours of application, it is moist, not thick and not sticky. The present invention relates to a cosmetic that is excellent in usability without sticking.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in cosmetics such as sunscreen agents, foundations, lipsticks, mascaras, eyeliners, and nail enamels, various film-forming agents have been used in order to prevent the makeup from being lost or to be transferred. This is because the cosmetic film made of these cosmetics is liable to cause makeup transfer such as sweat, sebum or other odors or bleeding, makeup collapse such as peeling due to friction of hands or clothes, or adhesion to cups or cigarettes, This is because, from the viewpoint of usability, a product having a long lasting makeup is desired for the purpose of preventing daily ultraviolet rays. In particular, in the hot summer season and the sports season, there is a need for more water-resistant and long-lasting makeup. Therefore, synthetic resin emulsions or oil-soluble resins having a film forming ability have been used for the purpose of preventing such makeup collapse.
[0003]
However, although synthetic resin emulsions and oil-soluble resins blended in cosmetics have the effect of preventing makeup collapse and the like to some extent due to the formed film, the film made of the synthetic resin originally has poor oxygen permeability. For this reason, when this is mixed in a cosmetic in a large amount, the skin formed on the skin surface prevents smooth skin breathing. Ironically, a woman who carefully pursued creativity and whitening in pursuit of cosmetology and whitening does not only obtain the aesthetic feeling, comfort, and peace of mind that are the main purposes of makeup, but also the makeup. Because of the membrane, there was a major problem that one had to endure a heavy and uncomfortable feeling of pressure.
[0004]
Thus, as the amount of the resin to be blended is increased for the purpose of better cosmetic durability, the elongation of the cosmetic at the time of application (at the time of makeup) becomes worse, and after several hours of application, unpleasant stickiness is felt. The inconsistency that the skin is stretched (tension) due to the strong film and the strong film is a problem that can not be overlooked for a woman wearing makeup in terms of tactile sensation and sensuality.
[0005]
Also, conventionally, in cosmetics such as sunscreen creams, foundations, facial cleansing foams, and shampoos, it is known that silica, particularly spherical silica, is blended and used as a filler in cosmetics in order to improve the finished feeling and feeling of use. (Patent Documents 1 and 2). However, the spherical silica can impart a certain feeling of use to cosmetics, but since it does not have the ability to form a film by itself, it basically has almost no action to prevent makeup collapse. Did not. Further, the problem of the above-mentioned feeling of tightness due to the use of a large amount of a synthetic resin emulsion or the like is hardly improved.
[0006]
[Patent Document 1]
Japanese Patent No. 2942428
[Patent Document 2]
JP-A-7-242125
[0007]
[Problems to be solved by the invention]
Thus, an object of the present invention is to have a long-lasting makeup, high oxygen permeability of the film, good elongation at the time of application, even after several hours of application, it is not thick, moist, non-sticky, and does not stretch. It is to provide cosmetics.
[0008]
The present inventors have conducted intensive studies from such a viewpoint, and as a result, the foliar silica having a specific flaky morphology proposed earlier by the present inventors has the ability to form a high film itself. By blending it into a cosmetic, its self-forming properties can give the cosmetic a high cosmetic durability, while basically eliminating the need to use a large amount of the synthetic resin emulsion, The present inventors have found that a high oxygen permeability, good elongation at the time of application, and that after several hours of application, a cosmetic that is not thick, moist, non-greasy, and does not stick, can be realized.
[0009]
[Means for Solving the Problems]
That is, according to the present invention, the following inventions are provided.
[0010]
[1] A cosmetic comprising flaky silica flake primary particles, in which planes are oriented in parallel with each other, and foliar silica secondary particles formed by overlapping a plurality of flakes.
[0011]
[2] The cosmetic according to [1], wherein the thickness of the foliar silica secondary particles to be added to the cosmetic is 0.001 to 3 μm, and the aspect ratio is at least 10 or more.
[0012]
[3] The cosmetic according to [1], wherein the foliar silica secondary particles to be mixed with the cosmetic are powdery.
[0013]
[4] The cosmetic according to [1], wherein the foliar silica secondary particles to be mixed with the cosmetic are in a slurry form dispersed in water at a concentration of 1 to 30% by mass.
[0014]
[5] The cosmetic according to [1], wherein the foliar silica secondary particles to be mixed with the cosmetic are dispersed in an organic medium at a concentration of 1 to 20% by mass.
[0015]
[6] The cosmetic according to any one of [1] to [5], further comprising one or more polymer substances capable of forming a film.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail.
[0017]
The feature of the present invention is that, as a filler of a cosmetic, a specific form of silica having a self-film-forming property, that is, flaky primary particles of flaky silica are oriented in parallel between planes, and a plurality of The point is that secondary foliate silica particles formed in combination are blended.
[0018]
(Leaf silica secondary particles)
First, the foliar silica secondary particles used in the present invention will be described.
The secondary particles of the leaf-like silica particles are substantially composed of leaf-like silica formed by stacking a plurality of sheets with the flake primary particles as a basic constituent unit and the primary particles are mutually oriented so that their planes are parallel to each other. And foliar silica having a particle structure of a laminated structure.
[0019]
The flaky primary particles are very thin flaky silica and have a thickness of 0.001 to 0.1 μm. Such flake primary particles are oriented parallel to each other so as to form one or a plurality of overlapping leaf-like silica secondary particles, and the thickness of the secondary particles is preferably 0.001 to 3 μm, and more preferably 0.001 to 3 μm. Is 0.005 to 2 μm, and the ratio (aspect ratio) of the longest length of the foliar silica secondary particles (plates) to the thickness is at least 10, preferably 30 or more, and more preferably 50 or more; The ratio of the minimum length of the leaf-like silica secondary particles (plates) to the thickness is flaky silica having at least 2, preferably 5 or more, more preferably 10 or more. The secondary particles exist independently of each other without fusing.
[0020]
If the thickness of the foliar silica secondary particles is too small, less than 0.001 μm, the mechanical strength of the particles is insufficient, which is not preferable. On the other hand, when the thickness is more than 3 μm, when blended into a cosmetic, whitening or the like occurs, giving an unnatural finish. When the ratio of the maximum length to the thickness is smaller than 10, and when the ratio of the minimum length is smaller than 2, it is not preferable because the film forming property is reduced. Although the upper limit of each is not particularly specified, the former is practically 300 or less, preferably 200 or less, and the latter is practically 150 or less, preferably 100 or less.
[0021]
As described above, the thickness and length of the foliar silica secondary particles according to the present invention mean the average value of the secondary particles unless otherwise specified.
[0022]
In the present invention, the leaf shape may be any as long as the particles have a substantially thin plate-like shape, which may be partially or wholly bent or twisted.
[0023]
The foliar silica secondary particles in the present invention have a very unique self-forming property due to their morphology, and can easily form a strong silica coating even at room temperature. For example, the aqueous dispersion of the foliar silica secondary particles used in the present invention is applied on a glass substrate or the like, and dried at room temperature, and cured without using a film-forming agent or a film-forming auxiliary, A tough coating film is easily formed. This coating is very strong and does not peel off easily. As will be described later, this self-film-forming property has an important function and effect when incorporated into a cosmetic.
[0024]
Agglomerated silica particles (tertiary silica particles) having gaps formed by three-dimensionally foliated silica secondary particles further overlapping each other irregularly are disclosed in, for example, JP-A-11-29317. Can be easily obtained by the method proposed in (1), but it does not have at least a self-film-forming property. ) Is one that is hardly expressed.
[0025]
Furthermore, conventionally, silica gel has been well known as a filler for cosmetics.However, silica gel particles, which are amorphous porous particles having a spherical or irregular shape, are used as a water slurry. When coated and dried on a substrate, a coating film is formed, but this coating film is extremely weak and does not resemble the coating film composed of the aqueous dispersion of secondary particles of foliar silica used in the present invention. It is an unusual coating film that collapses easily with just a light touch. This point is a remarkable contrast with the secondary particles of foliar silica in the present invention.
[0026]
The strong self-forming property of the foliar silica secondary particles used in the present invention and the solidity of the formed film are considered to be due to the following reasons.
[0027]
That is, when examining the SEM photograph of the cross section of the coating film formed by applying and drying the aqueous dispersion of the foliar silica secondary particles on the substrate, the foliar silica secondary particles basically show the foliar silica secondary particles. Although they are formed by stacking each other in parallel, more specifically, it is clearly recognized that the particle morphology has a moderate bend, is oriented in a bent state, and closely overlaps. Can be Since they bend each other and are densely overlapped in a wavy manner, it is considered that they are unlikely to slide in the longitudinal direction (plane direction). Also, since a large number of minute irregularities are formed on the particle surface, these are entangled like hooks with each other, as if they exhibit a locking action like an anchor or a magic fastener (registered trademark), It is also assumed that the film is fixed in the cross-sectional direction (the direction perpendicular to the longitudinal direction) and a strong film is formed as a whole.
[0028]
The secondary particles are formed by laminating flaky primary particles, and the flaky primary particles are completely separated by ordinary means into individual flakes of the constituent unit. The foliar silica secondary particles are firmly bonded and integrated with each other to such an extent that they are difficult to separate. Since this secondary particle is formed as a constituent unit (that is, a so-called building block), it is considered that the cosmetic of the present invention in which the secondary foliate silica particles are blended is extremely excellent in cosmetic durability. Can be
[0029]
(Preparation of foliar silica secondary particles)
The foliar silica secondary particles used in the present invention are so-called silica-X and silica-Y as substances, and as described above, the flaky primary particles of fine flaky silica are faced to each other. The particles are oriented in parallel, and a plurality of particles overlap to form a leaf-like shape.
[0030]
The foliar silica secondary particles are obtained by a method in which active silicic acid, silica sol, aerosil, silica hydrogel, silica gel (silica xerogel), or the like is used as a starting material and these are hydrothermally treated in the presence of an alkali metal. Further form three-dimensionally irregularly overlapping silica tertiary aggregated particles (tertiary particles), and then perform various post-treatments such as crushing and drying to obtain the tertiary particles. Can be prepared by a method of crushing to obtain secondary foliar silica particles. It is currently difficult to directly produce secondary particles without going through tertiary particles.
[0031]
Methods for producing tertiary particles aggregated by hydrothermal treatment are already known, for example, the method of Hydemann et al. (Beytr. Minalal. Petrogr., 10, 242-259 (1964)), Mitsyuk. B. A. (Geochem. Int. 13, 101-111 (1976)) and the method of Kitahara et al. (Proc. Inst. Symp. Hydrotherm. React. 1). ^st (1983)) and any of the methods proposed by the present inventors in JP-A-11-29317, JP-A-2001-163613 and the like are preferably used. Hereinafter, a method of producing tertiary particles and further a post-treatment of the tertiary particles to produce foliar silica secondary particles will be described mainly with reference to the method of the present inventors, but it is needless to say that the present invention is not limited thereto.
[0032]
In the present invention, the amount of the foliar silica secondary particles to be incorporated into the cosmetic can be changed depending on the type of cosmetic, the use environment, and the like. It is about 20% by mass, preferably about 0.1 to 10% by mass.
[0033]
In addition, the form of the foliar silica is preferably selected from any of a water slurry form, a powder form, and an organic medium slurry form according to the kind of the cosmetic to be treated. Hereinafter, each of them will be sequentially described.
[0034]
(Water slurry-like foliar silica secondary particles)
First, the preparation of water-slurried silica secondary particles in which leaf-like silica secondary particles are dispersed in water will be described. An aqueous slurry of foliar silica is a preferred form when it is blended with an aqueous cosmetic such as an O / W sunscreen cream, as shown in Examples below.
[0035]
Hydrothermal treatment of the starting material such as the silica hydrogel is performed by heating in a heating pressure vessel such as an autoclave to obtain tertiary aggregated silica particles. In order to obtain a phase in a short time, the temperature range is preferably from 150 to 220 ° C, more preferably from 160 to 200 ° C. The required time for the hydrothermal treatment may vary depending on the temperature of the hydrothermal treatment, the presence or absence of the addition of seed crystals, and the like, but is usually about 3 to 50 hours, preferably about 5 to 40 hours.
[0036]
The tertiary silica aggregate particles thus obtained in the form of a water slurry are washed and solid-liquid separated using a solid-liquid separation / water washing device such as a belt filter, and then repulped with water, and then subjected to SiO 2 re-pulp. ₂ A water slurry having a concentration of 1 to 30% by mass is supplied to a wet grinding device (crushing device), for example, a wet bead mill, a wet ball mill, or a high-speed thin-film swirling mixer, to crush silica tertiary aggregate particles. Thus, a water slurry of the leaf-like silica secondary particles can be obtained. Here, it is particularly preferable to use a medium bead having a diameter of 0.2 to 1.0 mm such as alumina or zirconia as the wet bead mill.
[0037]
It is desirable that the foliar silica secondary particles as a water slurry when blended in a cosmetic are water slurries dispersed in water at a concentration of 1 to 30% by mass, preferably 1 to 20% by mass. In addition, it is preferable to maintain this slurry concentration even when a germicide described below is added.
[0038]
The secondary silica particles in the present invention may be partially mixed with flaky primary particles or tertiary aggregate particles, as long as the self-forming property is not impaired. .
[0039]
(Fungicide)
The aqueous slurry of the secondary particles of foliar silica in the present invention can be basically blended with cosmetics as it is. However, it is preferable to add an appropriate bactericide during storage, during blending into cosmetics, and after blending, in order to prevent growth due to contamination by bacteria. As a bactericide that can be used, a substance that has bactericidal, bacteriostatic, and antibacterial effects, and that does not cause a problem on the skin or the like when blended in cosmetics is not particularly limited, and is conventionally known. Any of them can be suitably used. The term "bactericide" as used herein has a broad meaning including so-called antibacterial agents.
[0040]
Examples of fungicides that can be used include, for example, organic acids such as benzoic acid, salicylic acid, propionic acid, dehydroacetic acid, sorbic acid, boric acid, chitosan, and carbonic acid, and salts thereof; methyl paraben, ethyl paraben, propyl paraben, butyl paraben and the like. P-hydroxybenzoates; gallic esters such as octyl gallate and propyl gallate; and
[0041]
Quaternary cationic substances such as benzalkonium chloride, alkyltrimethylammonium chloride, alkyldiaminoethylglycine chloride, cetylpyridinium chloride, chlorhexidine chloride, alkylisoquinolium bromide, chlorhexidine gluconate; isopropylmethylphenol, orthophenylphenol Phenol compounds such as phenylphenol and cresol; lower alcohols such as phenoxyethanol, ethanol, isopropanol, 1,3 butylene glycol, 1,2 pentanediol and propylene glycol;
[0042]
Photosensitizers such as photosensitizers 101, 201, 301 and 401; naturally occurring antibacterial substances such as hinokitiol, bisabolol and betaine;
[0043]
In addition, parachloromethcresol, hexachlorophen, resorcinol, tribromosalan, methylchloroisothiazolone, methylisothiazolone, imidazolidinium urea, trichlorocarbanilide, halocarban, thymol, thiram, triclosan, lauroyl sacosine sodium, monoundecylenate Examples include ethanolamide, but are not limited thereto.
[0044]
The amount of the fungicide to be added may vary depending on the type of fungicide, the efficacy, the type of cosmetics to be treated, and the like, but is usually 0.01 to 30% by mass as the concentration in the aqueous slurry of foliar silica secondary particles. Preferably, more preferably, 0.03 to 20% by mass is used. When the amount is too small, the bactericidal action is insufficient. On the contrary, when the amount is excessively large, the feeling of use of the cosmetic is impaired.
[0045]
(Powdered silica secondary particles)
The powdery silica secondary particles can be prepared by dehydrating and drying the water slurry-like silica secondary particles using a suitable drying device.
[0046]
That is, the water slurry of the secondary particles of foliar silica to which no disinfectant is added is preferably sufficiently diluted to adjust the silica content concentration to 1 to 5% by mass, and the particles are brought into contact with each other during drying to aggregate and adhere. What is necessary is just to dry with a suitable dryer without the thing. Such a dryer may be a flash dryer, but is most preferably a spray dryer (spray dryer), which is used to obtain a powder of the secondary particles of foliar silica by spray drying. Can be done.
[0047]
(Secondary particles of foliar silica in organic medium slurry)
The organic medium slurry in which the foliar silica secondary particles are dispersed in an organic medium is obtained as follows from a water slurry of the foliar silica secondary particles to which the above-mentioned disinfectant is not added.
[0048]
That is, to the water slurry, a water-soluble and / or water-insoluble organic medium and, if necessary, a surfactant are also added and mixed, and then water is removed by a method such as evaporation (dehydration treatment). By transferring the silica particles into the organic medium material, the water slurry can be converted to an organic medium slurry.
[0049]
Thus, during this operation, the foliar silica secondary particles dispersed in the water undergo phase transfer and are highly dispersed in the organic liquid substance in the same state as when they were present in the water. Such a dehydration treatment (medium replacement) can employ a suitable method depending on the properties of the organic medium (organic solvent) to be converted, and is not limited to a specific method. For example, unit operations such as evaporation, distillation (reduced pressure), steam distillation (azeotropic), filtration and concentration, and centrifugal concentration can be applied, and industrial chemical equipment generally industrialized according to each unit operation is used. it can.
[0050]
In particular, in the case where water and the organic medium form a two-layer, the operation of condensing the distilled vapor by the distillation operation and separating it into two layers is continued, and the operation of refluxing only the organic phase into the distillation apparatus is continued. This makes it possible to completely replace the water in the system with the organic medium. Here, supplying a new organic medium during the distillation operation is also a preferable operation.
[0051]
When the secondary particles of foliar silica in the form of an organic medium slurry are blended in a cosmetic, it is desirable that the slurry is a slurry dispersed in an organic medium at a concentration of 1 to 20% by mass, preferably 1 to 10% by mass.
[0052]
(Organic medium)
The organic medium for forming the organic medium slurry is a liquid one, which can be separated from water by a separation operation such as distillation, and also, in the organic medium-based slurry, silica particles that are dispersoids are stably dispersed. For the convenience of handling of the organic medium-based slurry, it is one having an appropriate boiling point and viscosity, especially when it is blended in cosmetics, as long as it does not cause a problem on the skin, etc., it is not particularly limited. For example, the following can be used. That is,
[0053]
Ethanol, 1-propanol, 2-propanol (isopropyl alcohol), 1-butanol, 2-butanol, 2-methyl-2-propanol (t-butyl alcohol), 2-methyl-1-propanol (isobutyl alcohol), pentanol Monohydric alcohols such as
[0054]
Polyhydric alcohols such as ethylene glycol, diethylene glycol and propylene glycol;
[0055]
Aliphatic hydrocarbons such as pentane, n-hexane, n-heptane, octane, nonane, decane, undecane, dodecane, tridecane, tetradecane, pentadecane;
[0056]
Aromatic hydrocarbons such as benzene, toluene, ethylbenzene, styrene, α-methylstyrene, β-methylstyrene, chlorobenzene, dichlorobenzene, and bromobenzene;
[0057]
Aliphatic ketones such as acetone, methyl ethyl ketone, methyl propyl ketone, methyl isopropyl ketone, methyl butyl ketone, methyl isobutyl ketone, pinacolone, diethyl ketone, butyrone, diisopropyl ketone;
[0058]
Aromatic ketones such as acetophenone, propiophenone, butyrophenone, valerophenone, benzophenone, dibenzylketone and 2-acetonaphthone;
[0059]
Ethyl ether, propyl ether, isopropyl ether, butyl ether, isobutyl ether, n-amyl ether, isoamyl ether, methyl propyl ether, methyl isopropyl ether, methyl butyl ether, methyl isobutyl ether, methyl n-amyl ether, methyl isoamyl ether, ethyl propyl ether Aliphatic ethers such as
[0060]
Glycol ethers such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, and diethylene glycol monomethyl ether;
[0061]
Aromatic ethers such as anisole, phenetole, phenyl ether and benzyl ether;
[0062]
Methyl formate, ethyl formate, propyl formate, isobutyl formate, n-amyl formate, isoamyl formate, methyl acetate, ethyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, n-amyl acetate, isoamyl acetate, methyl propionate, ethyl propionate Propyl propionate, isopropyl propionate, butyl propionate, isobutyl propionate, n-amyl propionate, crude amyl propionate, methyl butyrate, ethyl butyrate, propyl butyrate, isopropyl butyrate, butyl butyrate, isobutyl butyrate, n-amyl butyrate Fatty acid esters such as isoamyl butyrate, methyl valerate, ethyl valerate, methyl lactate, ethyl lactate, butyl lactate;
[0063]
Aromatic esters such as methyl benzoate, ethyl benzoate, methyl cinnamate, ethyl cinnamate, propyl cinnamate, methyl salicylate, ethyl salicylate, propyl salicylate, butyl salicylate, methyl phthalate, ethyl phthalate;
[0064]
Chlorinated hydrocarbons such as tetrachloroethane, trichloroethylene, perchloroethylene, dichloropropane, chlorobenzene;
[0065]
Fluorinated hydrocarbons such as 1,1,1,2-tetrafluoroethane (R-134a);
[0066]
Chlorine-containing fluorinated hydrocarbons such as 1,1-dichloro-2,2,2-trifluoroethane (R-123) and monochlorodifluoromethane (R-22);
[0067]
So-called dipolar aprotic solvents such as dimethylformamide, dimethylsulfoxide, hexamethylphosphamide, γ-butyrolactone, β-propiolactone, ε-caprolactone, sulfolane, and ethylenediamine are preferred.
[0068]
(Characteristics of foliar silica secondary particles)
The characteristic physical properties of the foliar silica secondary particles in the present invention are summarized just in case.
[0069]
The X-ray diffraction spectrum of silica in the silica secondary particles is 2θ corresponding to a card (hereinafter simply referred to as an ASTM card) number 16-0380 registered in the American Society for Testing and Materials (ASTM) in the United States. 2θ = 5.6 °, 25.8 ° and 2θ corresponding to Silica-X and / or ASTM card number 31-1233 characterized by major peaks at 4.9 °, 26.0 °, and 28.3 °. Silica consisting of silica-Y characterized by a main peak at 28.3 °. As peaks other than the above, peaks such as ASTM card numbers 31-1234 and 37-0386 are observed for silica-X, and ASTM card numbers 35-63 and 25-1332 are observed for silica-Y. is there.
[0070]
The above properties are useful for separating and identifying silica when a certain cosmetic containing silica is obtained. That is, the silica is observed with a SEM or a TEM, and this is a secondary particle of foliar silica having a specific particle size and an aspect ratio defined in the present invention. The substance can be confirmed to be the substance specified in the present invention.
[0071]
(Applicable cosmetics)
In the present invention, cosmetics to which foliar silica secondary particles are blended include skin care cosmetics, makeup cosmetics, hair cosmetics, cleansing cosmetics, basic cosmetics, suntan / sunscreen cosmetics, and eye cosmetics. It can be suitably used for liner cosmetics, nail cosmetics, lip cosmetics, oral cosmetics, and bath cosmetics.
[0072]
That is, as more specific cosmetics, skin care cosmetics such as lotion, milky lotion, cream, gel, essence, sunscreen agent (sunscreen cream (O / W type or W / O type), etc.) and sun oil Oily cake foundation, emulsified foundation (O / W type or W / O type), foundations such as cake foundation, white powder, makeup base, eye shadow, mascara, eyeliner, eyebrow, nail enamel, overcoat agent, lipstick, blusher Makeup cosmetics such as lip gloss, pressed powder, etc .; Hair cosmetics such as hair cream, shampoo, rinse, conditioner, hair gel, hair styling, hair treatment, hair liquid, hair styling; facial cleansing foam, shampoo, cleansing, pack , Peel off Click and cleaning cosmetics such as these, the dosage form, liquid, emulsion, solid, paste, can be appropriately selected in the form of gel or the like.
[0073]
(Film-forming polymer substance)
In the present invention, it is preferable to blend a film-forming polymer material having a film-forming ability into the cosmetic together with the secondary particles of the foliated silica.
[0074]
However, in the present invention, the main function and effect is expressed by the formation of a silica film due to the self-film forming property of the foliar silica secondary particles. In other words, the silica secondary particles are used as essential components, and the film-forming polymer substance is positioned and compounded as a component that assists the film-forming action of the foliated silica secondary particles. Therefore, in the case where the film-forming polymer substance in the present invention is blended, it is sufficient to add a much smaller amount than in the case where it is conventionally used alone.
[0075]
Examples of the polymer substance having a film forming ability used in the present invention include acrylic resin, silicone resin, alkyd resin, carboxyvinyl polymer, olefin / maleic anhydride copolymer or a salt thereof, epoxy resin, vinylpyrrolidone-based polymer, and Other polymers are mentioned, for example, the following are exemplified as preferable ones. For example,
[0076]
As acrylic resin, polyacrylic acid, polymethyl acrylate, polyethyl acrylate, polybutyl acrylate, polyacrylamide, poly-N-isopropylacrylamide, ammonium polyacrylate, sodium polyacrylate, cross-linked polyacryl Sodium acrylate, polymethacrylic acid, polymethyl methacrylate, polyethyl methacrylate, polybutyl methacrylate, polysodium methacrylate, acrylic acid / styrene / ammonium methacrylate copolymer, acrylic acid / styrene copolymer, acrylic acid / Methacrylamide copolymer, alkyl acrylate / styrene copolymer, alkyl acrylate copolymer, ethyl acrylate / acrylamide / acrylic acid copolymer, ethyl acrylate / butyl acrylate copolymer, acrylic Ethyl acrylate / ethyl methacrylate copolymer, ethyl acrylate / methyl methacrylate / acrylic acid copolymer, ethyl acrylate / methyl methacrylate copolymer, ethyl acrylate / methacrylic acid copolymer, octyl acrylate / styrene Copolymer, octyl acrylate / vinyl acetate copolymer, hydroxypropyl acrylate / butylaminoethyl methacrylate / octylamide acrylate copolymer, butyl acrylate / hydroxyethyl methacrylate copolymer, butyl / hydroxy acrylate Methacrylic acid copolymer, butyl acrylate / methyl methacrylate copolymer, butyl acrylate / methacrylic acid copolymer, butyl acrylate / vinyl acetate copolymer, methyl acrylate / ethyl acrylate copolymer, acrylic acid Methyl styrene copolymer Methoxyethyl acrylate / hydroxyethyl acrylate / butyl acrylate copolymer, methoxyethyl acrylate / hydroxyethyl acrylate copolymer, acrylic resin alkanolamine, methacrylic acid / styrene copolymer, methacrylic acid / butyl methacrylate Polymers, methacrylic acid / methyl methacrylate copolymer, methyl methacrylate / butyl acrylate / octyl acrylate copolymer;
[0077]
Examples of the silicone resin include alkyl-modified silicone, oxazoline-modified silicone, dimethylsiloxane / methylcetyloxysiloxane copolymer, trimethylsiloxysilicic acid, and highly polymerized methylpolysiloxane.
[0078]
Examples of the alkyd resin include isophthalic alkyd resin, epoxy-modified phthalic alkyd resin, succinic alkyd resin, cyclohexane alkyd resin, cyclohexene alkyd resin, phthalic alkyd resin, and rosin-modified maleic alkyd resin. ;
[0079]
Examples of the carboxyvinyl polymer include a carboxyvinyl polymer, an alkyl-modified carboxyvinyl polymer, and a calcium salt or a potassium salt thereof;
[0080]
Examples of the olefin / maleic anhydride copolymer or a salt thereof include an ethylene / maleic anhydride copolymer and an isobutylene / sodium maleate anhydride copolymer;
[0081]
Examples of the epoxy resin include bisphenol A type epoxy resin oleate, bisphenol A type epoxy resin stearic acid ester, bisphenol A type epoxy resin ricinoleate, epoxy resin tallow fatty acid ester, and epoxy resin whale oil fatty acid ester;
[0082]
Examples of the vinylpyrrolidone-based polymer include polyvinylpyrrolidone, vinylpyrrolidone / styrene copolymer, vinylpyrrolidone / vinyl acetate copolymer, vinylpyrrolidone diethyl sulfate, and N, N'-dimethylaminoethyl methacrylic acid copolymer;
[0083]
Other resins and polymers include polyvinyl alcohol, polyvinyl methyl ether, vinyl methyl ether / ethyl maleate copolymer, vinyl methyl ether / butyl maleate copolymer, styrene / methyl styrene / indene copolymer, and toluene sulfonamide resin And polyvinyl butyrate, polyvinyl chloride, polyvinyl acetate, vinyl acetate / crotonic acid copolymer, vinyl acetate / styrene copolymer, butadiene / acrylonitrile copolymer and the like.
[0084]
These resins can be used alone or in appropriate combination of two or more kinds.
[0085]
Among the film-forming polymers, those particularly preferably used in combination with the secondary particles of the foliar silica in the present invention include, for example, acrylic resins, alkyd resins, silicone resins such as trimethylsiloxysilicic acid, and polyvinyl alcohol. By blending them together in a much smaller range than in the past and using them together, a decorative film having higher oxygen permeability, no stickiness and high film strength can be formed.
[0086]
It is not necessary to add such a large amount of the film-forming polymer material to the cosmetic, and from the viewpoint of feeling of use and stability, 0.001 to 30% by mass, particularly 0.005 to 20% by mass Is preferred.
[0087]
(Basic ingredients of cosmetics)
As the components used in the cosmetic of the present invention, any components generally used in cosmetics can be appropriately used according to the purpose within a range that does not impair the purpose of the present invention.
[0088]
For example, coloring pigments, bright pigments, organic powders, inorganic powders, surface-treated powders, tar dyes, oils, resins, surfactants, ultraviolet absorbers, fragrances, fragrances, preservatives, bactericides, It is possible to mix and use any of the basic components normally compounded in cosmetics, such as antioxidants, humectants, cosmetic ingredients, thickeners, physiologically active ingredients, and solvents.
[0089]
Specifically, the following are exemplified.
That is, as the powder, talc, kaolin, sericite, mica, silica, hydroxyapatite, boron nitride, ceramic powder, nylon powder, silicon powder, polyethylene powder, acrylic powder, microcrystalline cellulose, urethane powder, titanium oxide, Inorganic white pigments such as zinc oxide;
[0090]
Pearl pigments such as iron oxide (iron oxide), iron titanate, etc., yellow iron oxide, black iron oxide, ultramarine, navy blue, titanium oxide-coated mica, bismuth oxychloride, fish scale foil, colored titanium oxide-coated mica;
[0091]
Aluminum powder, Copper powder, Red No. 201, Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No. 228, Red No. 405, Orange No. 203, Orange No. 204, Orange No. 205, Organic pigments such as 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 No. 202, Yellow No. 203, Yellow No. 3, Green No. 3 and Blue No. 1, inorganic powders such as zirconium, barium or aluminum lakes, organic powders, inorganic coloring pigments, metal powder pigments, organic coloring pigments and surfaces of these powders A surface-treated powder coated with silicone, fluorine, metal soap, etc. is used,
[0092]
Oil phase components include squalane, liquid paraffin, petrolatum, microcrystalline wax, ozokerite, ceresin, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, isostearic acid, cetyl alcohol, stearyl alcohol, isostearyl alcohol, 2- Octyldodecanol, oleyl alcohol, isopropyl myristate, 2-octyldodecyl myristate, cetyl 2-ethylhexanoate, diisostearyl malate, glyceryl tri-2-ethylhexanoate, cetyl palmitate, isotridecyl isononanoate, isononane Isononyl acid, 2-octyldodecyl myristate, neopentyl glycol di-2-ethylhexanoate, glycerol tri-2-ethylhexanoate, oleic acid -Octyldodecyl, isopropyl myristate, glycerol triisostearate, glycerol tricoconut oil, candelilla wax, carnauba wax, jojoba oil, beeswax, lanolin, olive oil, camellia oil, macadamia nut oil, castor oil, methylpolysiloxane, methylphenyl Various hydrocarbons such as polysiloxane and decamethylcyclopentasiloxane, higher fatty acids, higher alcohols, esters of fats and oils, waxes, fats and oils, silicone oils and the like;
[0093]
As a surfactant, higher fatty acid soap, alkyl sulfate ester salt, polyoxyethylene alkyl ether sulfate, alkyl trimethyl ammonium chloride, dialkyl dimethyl ammonium chloride, alkyl dimethyl amino acetate betaine, alkyl amide dimethyl amino acetate betaine, polyoxyethylene addition Anions, cations, amphoterics such as aliphatic alcohols, polyoxyethylene-added higher fatty acids, polyoxyethylene-added alkylphenols, polyoxyethylene-added sorbitan higher fatty acid esters, glycerin higher fatty acid esters, sorbitan higher fatty acid esters, sucrose higher fatty acid esters, and lecithin And nonionic surfactants.
[0094]
In addition, as humectants, amino acids, NMF components, glycerin, propylene glycol, 1,3-butylene glycol, polyethylene glycol, sorbitol, PCA soda, etc .; as polymeric substances, proteins such as collagen, collagen derivatives, keratin degradation products, Chitin and its derivatives, chitosan and its derivatives, gum arabic, guar gum, locust bean gum, xanthan gum, carrageenan, pullulan, pectin, dextrin, quince, agar, hyaluronic acid, chondroitin sulfate, methyl polyglutamate, ethyl polyglutamate, sodium alginate and Potassium, acrylic resin and derivatives thereof, alkyl-modified silicone, oxazoline-modified silicone, dimethylsiloxane / methylcetyloxysiloxane copolymer, Limethylsiloxysilicic acid, highly polymerized methylpolysiloxane, cellulose derivative, alkyd resin and its derivative, carboxyvinyl polymer and its derivative or its salt, olefin / maleic anhydride copolymer or its salt, epoxy resin and its derivative, vinyl Pyrrolidone and its derivatives;
[0095]
Plasticizers such as acetyltributyl citrate;
Various benzophenone derivatives such as oxybenzone, hydroxymethoxybenzophenonesulfonic acid, para-aminobenzoic acid, para-dimethylaminobenzoic acid-2-ethylhexyl, para-methoxycinnamic acid-2-ethylhexyl, octyl salicylate, homomenthyl salicylate, para-aminobenzoic acid derivatives, para-methoxy benzoic acid derivatives UV absorbers such as succinic acid derivatives and salicylic acid derivatives;
[0096]
Antioxidants such as tocopherols, BHT, BHA, and gallic acid esters; sequestering agents such as ethylenediaminetetraacetic acid;
[0097]
There are no particular restrictions on the preparation of the cosmetic of the present invention, except for the addition of foliar silica secondary particles in a form (powder, water slurry, organic medium slurry) suitable for the target cosmetic. A known preparation method can be appropriately applied.
[0098]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples. However, these are merely examples, and the technical scope of the present invention is not construed as being limited thereto.
That is, the types of cosmetics to which the present invention is applied, and the components thereof, are not limited to those described in the following examples. All can be contained without any restrictions.
In the following Examples and Comparative Examples, the blending amounts of the respective components are all mass% unless otherwise specified.
[0099]
[Reference Example 1] (Production of silica tertiary aggregate particles in which leaf-like silica secondary particles are aggregated)
SiO ₂ / Na ₂ O = 3.0 (molar ratio), SiO ₂ An aqueous sodium silicate solution having a concentration of 21.0% by mass and an aqueous solution of sulfuric acid having a sulfuric acid concentration of 20.0% by mass are introduced into separate containers through a separate inlet, and are instantaneously uniform. After mixing, the flow rate ratio of the two liquids is adjusted so that the pH of the liquid discharged into the air from the discharge port becomes 7.5 to 8.0, and the uniformly mixed silica sol liquid is continuously air-flowed from the discharge port. Released into. The released liquid became spherical droplets in the air and gelled in the air while flying in a parabola for about 1 second. A water tank filled with water was placed at the dropping point, and the tank was dropped and aged.
[0100]
After aging, the pH of the water tank was adjusted to 6, and the well was sufficiently washed with water to obtain a silica hydrogel. The obtained silica hydrogel particles had a spherical particle shape and an average particle diameter of 6 mm. SiO in the silica hydrogel particles ₂ The mass ratio of water to mass was 4.55 times.
[0101]
The silica hydrogel particles were roughly pulverized to an average particle diameter of 2.5 mm using a double roll crusher, and subjected to hydrothermal treatment to obtain tertiary silica aggregate particles as described below.
[0102]
In a 50000 ml autoclave (electrically heated, with anchor-type stirring blades), the total SiO 2 in the system was ₂ / Na ₂ The above silica hydrogel (SiO 2 having a particle size of 2.5 mm) such that the O molar ratio becomes 12.0. ₂ 23.7 kg) and an aqueous solution of sodium silicate (SiO 2 ₂ 28.75% by mass, Na ₂ O9.3% by mass, SiO ₂ / Na ₂ 5.5 kg (O = 3.17 (molar ratio)) was added, and 10.7 kg of ion-exchanged water was added thereto, and a hydrothermal treatment was performed at 185 ° C. for 8 hours while stirring at 50 rpm. The total silica concentration in the system is SiO ₂ Was 15% by mass.
[0103]
The slurry after the hydrothermal treatment is subjected to filtration water washing using a filter cloth type vertical centrifugal separator (manufactured by Toko Kikai Co., Ltd., TU-18 type), and a water content of 69.7% by mass (solid content: 30.3%) Wt%) of a silica wet cake.
[0104]
Observation of the form of the wet cake-like product particles by SEM revealed that silica tertiary aggregate particles in which the leaf-like silica secondary particles were three-dimensionally aggregated were formed. When the particle size was measured by a laser diffraction / scattering type particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.), the average particle size was 7.2 μm.
[0105]
[Reference Example 2] (Production of water slurry of foliar silica secondary particles)
To 20Og of the wet cake obtained in Reference Example 1 (solid content concentration: 30.3% by mass), 1020g of ion-exchanged water was added, and again a water slurry of tertiary aggregated silica particles (solid content 15% by mass, pH 7.0). 2) 202 g were prepared.
[0106]
Next, this aqueous slurry was subjected to a shaft stirring speed of 3400 rpm and a flow rate of 10 L using a medium stirring bead mill (Dynomill KDL-PILOT A type (manufactured by Shinmaru Enterprises Co., Ltd.) (vessel capacity: 1.4 L, diameter: 0.5 mm, filled with 70% zirconia beads)). / H for three times to disintegrate and disperse to obtain a water slurry of secondary particles of foliar silica. The solid concentration of the obtained aqueous slurry of the leaf-like silica secondary particles was 15% by mass.
[0107]
Next, ethanol and methyl parapene were added as disinfectants to the aqueous slurry of the leaf-like silica secondary particles so as to have concentrations of 5% by mass and 0.15% by mass, respectively. As a result of measuring the particle diameter of the fine particles in the water slurry after the addition of the fungicide, the average particle diameter was 1.55 μm. Further, with respect to the average thickness of the leaf-like particles observed by SEM of 0.06 μm, the average maximum length of the plate with respect to the thickness is 5.4 μm, the aspect ratio is 90, and the average minimum length of the plate is 1 0.6 μm, and the aspect ratio was 27.
[0108]
By the way, about 100,000 general bacteria / g were added to the water slurry of the secondary particles of the leaf-like silica to which the disinfectant was not added and the water slurry to which the disinfectant was added as described above. Two weeks later, when the number of general bacteria was measured, almost the same value was obtained when no fungicide was added, whereas when the fungicide was added, the number of general bacteria was zero. / G.
[0109]
[Reference Example 3] (Production of secondary particle powder of foliar silica)
To 1000 g of the wet cake obtained in Reference Example 1 (solid content: 30.3% by mass), 7500 g of ion-exchanged water was added, and a water slurry of silica tertiary aggregate particles (solid content 3.7% by mass, pH 7) was again added. 8) was prepared in an amount of 8500 g.
[0110]
This was supplied to a spray dryer and spray-dried under the condition of a hot air temperature of 300 ° C. to obtain 300 g of powder. The average particle diameter of this powder is 1.8 μm, the average thickness of the leaf-shaped particles observed by SEM is 0.07 μm, and the average maximum length of the plate with respect to the thickness is 5.0 μm. The aspect ratio was 71, the average minimum length of the plate was 1.8 μm, and the aspect ratio was 30.
[0111]
[Reference Example 4] (Production of organic medium slurry of foliar silica secondary particles)
Using methyl isobutyl ketone (hereinafter may be abbreviated as MIBK) as the organic medium, an organic medium slurry of secondary particles of foliar silica was produced. That is, 161 g of MIBK was added to 25 g (solid content concentration: 15% by mass) of a water slurry of the foliated silica secondary particles after the wet disintegration shown in Reference Example 2 (without adding a fungicide). In addition, the mixture was mixed well by hand to prepare a mixed slurry of water and MIBK.
[0112]
Next, in order to azeotropically evaporate water in the mixed slurry, normal pressure simple distillation was performed using a rotary evaporator (N-type, manufactured by Tokyo Rika Kikai Co., Ltd.). That is, 186 g of the mixed slurry was charged into a 500 ml eggplant-shaped flask, distilled for 30 minutes under the condition of an oil bath at 150 ° C., and the steam distilled out in an azeotropic composition was cooled and liquefied and separated into two phases in a receiving tank. (MIBK phase) and a lower phase (aqueous phase) were separated.
[0113]
In the receiving tank, the aqueous phase separates and settles in the form of small spheres in the upper phase (MIBK phase) and coalesces with the lower phase (aqueous phase), so that the distilling state of water can be clearly confirmed. As the dehydration proceeds, the amount of the separated small balls (aqueous phase) gradually decreases, and as the dehydration approaches, the distillation bottom in the eggplant flask gradually becomes viscous, and the amount of the slurry adhered to the flask wall surface increases. Increase. Then, 32 ml of MIBK was further added to complete the dehydration.
[0114]
The total amount of the distillate was 139 g, the upper phase (MIBK phase) was 120.3 g, and the lower phase (aqueous phase) was 18.7 g. As a result of the density measurement of each phase, the water in the upper phase is estimated to be 2%, the water in the lower phase (aqueous phase) is estimated to be 98.1%, and the amount of distilled water is estimated to be 21 g. Since the water in the water slurry of the raw material was about 21.3 g, it was judged that almost all the amount was distilled.
[0115]
On the other hand, 47 g of a translucent white milky organic medium slurry (MIBK slurry) was obtained as a distillation residue. The solid content concentration of this slurry was 7.9% by mass when measured with an infrared irradiation moisture meter (FD-600, manufactured by Kett), and the water content was measured using a Karl Fischer moisture meter (MK-AS, manufactured by Kyoto Electronics Co., Ltd.). ) Was 0.28% by mass.
[0116]
On the other hand, when the particle shape was observed by SEM, it was observed that the particles were in the form of leaf-like silica secondary particles.
[0117]
Moreover, as a result of measuring the particle diameter of the fine particles in the organic medium slurry, the average particle diameter was 1.62 μm. The average thickness of the leaf-like particles observed by SEM is 0.065 μm, the average maximum length of the plate with respect to the thickness is 5.3 μm, the aspect ratio is 85, and the average minimum length of the plate is 1.7 μm. And the aspect ratio was 26. The solid content concentration of the obtained MIBK dispersion of the leaf-like silica secondary particles was 15% by mass.
[0118]
[Examples 1 to 4], [Comparative Examples 1 to 3] (O / W type sunscreen cream)
An O / W type sunscreen cream was prepared with and without the addition of the foliar silica secondary particles (aqueous dispersion) produced in Reference Example, and evaluated as follows.
[0119]
(A) Prescription
The formulation (O / W type sunscreen cream formulation) shown in Table 1 was followed.
[0120]
(B) Manufacturing method
The components (1) to (8) in Table 1 are uniformly heated and mixed, and the component (9) is added thereto and uniformly dispersed.
The components (10) to (17) are further added to the mixture of the components (1) to (9), and after emulsification, the mixture is cooled to room temperature to obtain a desired sunscreen cream.
[0121]
(C) According to the above-mentioned manufacturing method, O / W type sunscreen creams of Examples 1 to 4 and Comparative Examples 1 to 3 were prepared according to the formulations shown in Table 1.
The obtained O / W type sunscreen cream was evaluated by the evaluation method shown in the following (d). The results are shown in Table 2.
[0122]
[Table 1]

[0123]
(D) Evaluation method
The evaluation method in the performance test of the obtained O / W type sunscreen cream is as follows.
[0124]
(I) Makeup persistence :
An O / W type sunscreen cream was applied to form a coating film having a thickness of 20 μm on a glass plate, dried at room temperature for 15 minutes, left under a water flow for 10 minutes, observed, and evaluated according to the following criteria. .
[0125]
〇: No state change is observed.
Δ: Peeled slightly.
×: Completely peeled off.
[0126]
(B) Elongation during application :
A use test was performed by 10 panelists using an O / W type sunscreen cream, and the following <5-level absolute evaluation> was performed, and the average score was further evaluated according to the following <4-level evaluation>.
[0127]
<5-level absolute evaluation>
(Score)
Good: 5 points,
Somewhat good: 4 points,
Ordinary: 3 points,
Somewhat bad: 2 points,
Bad: 1 point
[0128]
<Four-step evaluation>
(Score)
◎: 4 points or more
：: 3 or more and less than 4 points,
Δ: 2 or more and less than 3 points,
×: Less than 2 points
[0129]
(C) Feeling of sealing :
A use test was conducted by 10 panelists, and the following <5-level absolute evaluation> was performed for each item 2-3 hours after application, and the average score was further evaluated according to the above <4-level evaluation>.
[0130]
<5-level absolute evaluation>
(Score)
There is no feeling of sealing at all: 6 points,
No sealing feeling: 5 points,
There is usually a feeling of sealing: 3 points,
There is a little feeling of sealing etc .: 2 points,
There is always a feeling of sealing: 1 point
[0131]
(D) Sticky :
A use test was performed by 10 panelists in the same manner as in (c) above, and the evaluation was similarly performed.
[0132]
(E) Feeling tight :
A use test was performed by 10 panelists in the same manner as in (c) above, and the evaluation was similarly performed.
[0133]
[Table 2]

[0134]
(E) Results and discussion
Generally, an O / W emulsion such as an O / W sunscreen cream has an advantage that the usability is superior to that of a w / o emulsion in which an external phase is an oil phase, while an external phase is an aqueous phase. Therefore, there is a problem in persistence of makeup due to sweat or the like. Therefore, in order to improve the durability of the makeup, a film-forming polymer is usually blended.However, if the blending is too much, the usability such as a feeling of sealing, stickiness, and a feeling of tightness is deteriorated.Conventionally, in consideration of the usability. A sufficient amount could not be blended.
[0135]
According to the present invention, even if the addition amount of the film-forming polymer is not significantly increased, the conventional problem of cosmetic continuity is maintained while maintaining the characteristics of the usability of the O / W emulsion. It was confirmed that it could be improved.
[0136]
Further, the foliar silica secondary particles in the present invention have film forming properties themselves, and since the film is a film made of an inorganic substance, unlike a conventional polymer film, it is 2 to 2 after coating. Even after 3 hours, it has a smooth finish and no tightness, stickiness or tightness.
[0137]
[Example 5] (oil-based cake foundation)
An oily cake foundation was prepared and evaluated for the case where the leaf-like silica secondary particles (powder) produced in Reference Example 3 were added.
[0138]
(A) Prescription
The formulation shown in Table 3 was followed.
[0139]
(B) Manufacturing method
The components (1) to (6) in Table 3 are uniformly pulverized. Next, the components (7) to (15) are heated and mixed, and the components (1) to (6) are added and uniformly stirred.
After the defoaming, the mixture is poured into a tray and gradually cooled to room temperature to obtain a target oily cake foundation.
[0140]
(C) Results and discussion
The oily cake foundation according to the present invention has good cosmetic continuity, good elongation, and basically a film of foliar silica secondary particles having its own film-forming ability is formed. There was no oily feeling, and even after a lapse of 2 to 3 hours after application, there was no feeling of tightness, stickiness or tightness, and the finish was smooth.
[0141]
[Table 3]

[0142]
[Example 6] (O / W type emulsified foundation)
An O / W type emulsified foundation was prepared and evaluated for the case where the secondary particles of foliar silica (aqueous dispersion) produced in Reference Example 2 were added.
[0143]
(A) Prescription
The formulation shown in Table 4 was followed.
[0144]
(B) Manufacturing method
The components (1) to (7) in Table 4 are heated and melted, and the components (8) to (9) mixed with stirring are added and uniformly dispersed. The components (10) to (16) heated and melted are gradually added thereto, and emulsification is performed. The mixture is stirred and cooled to room temperature to obtain a target O / W emulsion foundation.
[0145]
(C) Results and discussion
The O / W type emulsified foundation according to the present invention has good elongation and good cosmetic persistence due to the inorganic film of the foliar silica secondary particles having a self-film forming property despite being of the O / W type, Even after a lapse of 2 to 3 hours from the application, the finished product had no tightness, no stickiness and no tightness, and had a smooth finish.
[0146]
[Table 4]

[0147]
[Example 7] (Eye liner)
An eyeliner was prepared and evaluated for the case where the foliar silica secondary particles (aqueous dispersion) produced in Reference Example 2 were added.
[0148]
(A) Prescription
The formulation shown in Table 5 was followed.
[0149]
(B) Manufacturing method
The components (1) to (8) in Table 5 are heated and melted, and the components (9) to (10) mixed with stirring are added thereto, uniformly dispersed, and then cooled to obtain a target eyeliner.
[0150]
(C) Results and discussion
The eyeliner according to the present invention maintains a strong decorative film against sweat and tears, has good elongation, and has a feeling of tightness and stickiness of a vinyl acetate resin emulsion by a film of foliar silica secondary particles having good self-forming property. The feeling of tightness was improved and the finish was smooth.
[0151]
[Table 5]

[0152]
[Example 8] (lipstick)
A lipstick was prepared in the case where the secondary particles (powder) of the leaf-like silica produced in Reference Example 3 were added, and evaluated as follows.
[0153]
(A) Prescription
The formulation shown in Table 6 was followed.
[0154]
(B) Manufacturing method
The blending components (1) to (11) in Table 6 are heated and melt-mixed and uniformly stirred.
After defoaming the mixture, it is poured into a mold and quenched to obtain the desired lipstick.
[0155]
(C) Results and discussion
The lipstick according to the present invention was hard to transfer to clothes, cups and the like, had no tightness, no stickiness, no tightness, and had a smooth finish.
[0156]
[Table 6]

[0157]
Example 9 (Solvent type nail enamel)
A solvent-type nail enamel was prepared and evaluated for the case where the leaf-like silica secondary particles (MIBK dispersion) produced in Reference Example 4 were added.
[0158]
(A) Prescription
The formulation shown in Table 7 was followed.
[0159]
(B) Manufacturing method
The components (1) to (11) in Table 7 are uniformly mixed, and the components (12) to (17) are added thereto and uniformly dispersed to obtain a desired solvent-type nail enamel.
[0160]
(C) Results and discussion
The pencil strength of the solvent-type nail enamel according to the present invention was measured by the pencil strength measurement method of JIS 5600, and as a result, it was confirmed that the durability was remarkably improved as compared with the product not containing the secondary particles of foliar silica. Also, unlike the case where a film-forming resin was compounded, there was no stringing, so that the film had good elongation, and because the formed film had excellent oxygen permeability, it did not have a feeling of sealing and had a dry finish.
[0161]
[Table 7]

[0162]
[Example 10] (W / O type mascara)
A W / O type mascara was prepared and evaluated for the case where the secondary particles (powder) of the leaf-like silica produced in Reference Example 3 were added.
[0163]
(A) Prescription
The formulation shown in Table 8 was followed.
[0164]
(B) Manufacturing method
The components (1) and (2) in Table 8 are heated and melted, and the components (3) and (5) mixed with stirring are added and uniformly dispersed. Heat-melted (6) to (8) are gradually added to the mixture, emulsification is performed, the mixture is stirred and cooled to room temperature, and (9) is further added to make the whole uniform to obtain a desired W / O type mascara.
[0165]
(C) Results and discussion
The W / O type mascara according to the present invention maintains a strong decorative film against sweat, tears, etc., has good elongation, and has a film of secondary particles of foliar silica having a self-film forming property. The seal feeling and stickiness were improved and the finish was smooth.
[0166]
[Table 8]

[0167]
[Example 11] (hair gel)
A hair gel was prepared and evaluated in the case where the secondary particles of foliar silica (aqueous dispersion) produced in Reference Example 2 were added.
[0168]
(A) Prescription
The formulation shown in Table 9 was followed.
[0169]
(B) Manufacturing method
The components (1) and (3) in Table 9 are dispersed in a part of (10). Further, the components (2) and (4) to (9) are dissolved in the remainder of the component (10). Both are mixed with stirring to obtain the desired hair gel.
[0170]
(C) Results and discussion
The hair gel according to the present invention maintains hair styling by the effect of elongation on the hair and the film-forming effect of the film-forming secondary silica leaf particles, reduces the stickiness unique to the water-soluble polymer, and gives a smooth finish.
[0171]
[Table 9]

[0172]
[Example 12] (Lotion)
A lotion was prepared and evaluated for the case where the foliar silica secondary particles (aqueous dispersion) produced in Reference Example 2 were added.
[0173]
(A) Prescription
The formulation shown in Table 10 was followed.
[0174]
(B) Manufacturing method
The components (1) to (10) in Table 10 are uniformly stirred and mixed at room temperature to obtain a desired lotion.
[0175]
(C) Results and discussion
The basic effect of the lotion according to the present invention is a long-lasting effect due to the film-forming effect of the foliar silica secondary particles having a film-forming property. Further, it was confirmed that by retaining some water in the silanol groups on the surface of the secondary particles of the leaf-like silica, the water retention was excellent and a smooth finish was obtained.
[0176]
[Table 10]

[0177]
[Example 13] (cream)
A cream was prepared and evaluated when the secondary particles (aqueous dispersion) of the leaf-like silica produced in Reference Example 2 were added.
[0178]
(A) Prescription
The formulation shown in Table 11 was followed.
[0179]
(B) Manufacturing method
The components (1) to (7) in Table 11 are melted by heating. The components (8) to (13) are gradually added to this to emulsify, and cooled to room temperature to obtain a desired cream.
[0180]
(C) Results and discussion
The cream according to the present invention has the same basic effect as the lotion described in Example 12 in that it has a long-lasting cosmetic effect due to the film-forming effect of the foliar silica secondary particles having film-forming properties. Thus, it was confirmed that the sealing effect of the secondary particles of foliar silica and that the silanol groups on the surface of the secondary particles of foliar silica retain a small amount of water have excellent water retention and provide a smooth finish.
[0181]
[Table 11]

[0182]
[Example 14] (peel-off pack)
A peel-off pack was prepared and evaluated for the case where the leaf-like silica secondary particles (aqueous dispersion) produced in Reference Example 2 were added.
[0183]
(A) Prescription
The formulation shown in Table 12 was followed.
[0184]
(B) Manufacturing method
The components (1) to (8) in Table 12 are mixed by heating. The components (9) and (10) mixed with stirring are added to the mixture and uniformly dispersed. The components (11) to (13) are added to the dispersion, dissolved by heating, and then cooled to room temperature. Furthermore, the whole is made uniform by adding the component (14) to obtain a desired peel-off pack.
[0185]
(C) Results and discussion
In the peel-off pack according to the present invention, a strong film is obtained by the film-forming effect of the film-forming secondary particles of foliar silica. The sealing effect of the secondary particles was imparted, and the silanol groups on the surface of the foliated silica secondary particles retained some water, so that excellent water retention and a moist feeling were obtained.
[0186]
[Table 12]

[0187]
[Example 15] (Facial cleansing foam)
A face-washing foam was prepared and evaluated when the secondary particles (powder) of the leaf-like silica produced in Reference Example 3 were added.
[0188]
(A) Prescription
The formulation shown in Table 13 was followed.
[0189]
(B) Manufacturing method
The components (1) to (11) in Table 13 are mixed by heating and uniformly dissolved. Components (12) to (14) are added thereto, and the mixture is cooled to room temperature. Then, it is filled into an appropriate container to obtain the desired facial cleansing foam.
[0190]
(C) Results and discussion
The face-washing foam according to the present invention had good foaming, and was good in both usability and stability over time.
[0191]
That is, the basic effect of the face-washing foam according to the present invention is that the formulated film-forming foliar silica secondary particles have a long-lasting cosmetic effect due to the film-forming effect. The air embraced the air and made it more foamy, so there was less nuisance after washing and the feel was refreshing.
[0192]
In addition, Patent Literature 1 describes a similar effect obtained by blending spherical silica, but the facial cleansing foam of the present invention foamed much more and had a better use feeling.
[0193]
[Table 13]

[0194]
[Example 16] (Shampoo)
A shampoo was prepared and evaluated for the case where the secondary particles (powder) of the leaf-like silica produced in Reference Example 3 were added.
[0195]
(A) Prescription
The formulation shown in Table 14 was followed.
[0196]
(B) Manufacturing method
The components (1) to (9) in Table 14 are mixed by heating, uniformly dissolved, and cooled to room temperature to obtain a desired shampoo.
[0197]
(C) Results and discussion
The shampoo according to the present invention had good foaming like the facial cleansing foam of Example 15, and was excellent in both usability and stability over time.
[0198]
That is, similarly to the facial cleansing foam of Example 15, air was entrapped in the gaps between the blended silica secondary particles and foaming was improved, so that there was little swelling after washing and a refreshing feel.
[0199]
In addition, although the similar effect by blending spherical silica is described in Patent Literature 1, the shampoo of the present invention foamed and had a better feeling in use.
[0200]
[Table 14]

[0201]
【The invention's effect】
As shown in the above examples, the cosmetic of the present invention contains secondary particles of foliar silica having a self-film-forming property. The feeling of use such as thickness, stickiness, and stiffness due to the feeling of sealing is greatly improved, and according to the present invention, a cosmetic having excellent makeup lasting properties and usability is provided.

Claims (6)

A cosmetic comprising flaky silica flake primary particles in which plane-to-plane orientation is parallel to each other and foliate silica secondary particles formed by overlapping a plurality of flakes. The cosmetic according to claim 1, wherein the thickness of the secondary particles of the foliar silica mixed in the cosmetic is 0.001 to 3 μm, and the aspect ratio is at least 10 or more. 2. The cosmetic according to claim 1, wherein the foliar silica secondary particles to be mixed with the cosmetic are in a powder form. 3. The cosmetic according to claim 1, wherein the foliar silica secondary particles to be mixed with the cosmetic are in a slurry form dispersed in water at a concentration of 1 to 30% by mass. 2. The cosmetic according to claim 1, wherein the foliar silica secondary particles to be mixed into the cosmetic are in a slurry form dispersed in an organic medium at a concentration of 1 to 20% by mass. The cosmetic according to any one of claims 1 to 5, further comprising one or more polymer substances capable of forming a film.