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JP3770600B2 - Oil-in-water cosmetic - Google Patents

Oil-in-water cosmetic Download PDF

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Publication number
JP3770600B2
JP3770600B2 JP2002095117A JP2002095117A JP3770600B2 JP 3770600 B2 JP3770600 B2 JP 3770600B2 JP 2002095117 A JP2002095117 A JP 2002095117A JP 2002095117 A JP2002095117 A JP 2002095117A JP 3770600 B2 JP3770600 B2 JP 3770600B2
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Japan
Prior art keywords
oil
component
fine particle
treated
water
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JP2002095117A
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JP2003286147A (en
Inventor
利之 伊藤
泰央 加川
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Kose Corp
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Kose Corp
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Priority to TW092104787A priority patent/TWI318118B/en
Priority to CNB031212298A priority patent/CN1250193C/en
Priority to KR1020030019373A priority patent/KR100983387B1/en
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/02Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/04Dispersions; Emulsions
    • A61K8/06Emulsions
    • A61K8/062Oil-in-water emulsions
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00Cosmetics or similar toiletry preparations
    • A61K8/18Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89Polysiloxanes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q1/00Make-up preparations; Body powders; Preparations for removing make-up
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q17/00Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings
    • A61Q17/04Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61QSPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00Preparations for care of the skin

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Public Health (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Birds (AREA)
  • Epidemiology (AREA)
  • Chemical & Material Sciences (AREA)
  • Dermatology (AREA)
  • Dispersion Chemistry (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Cosmetics (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は表面処理された微粒子粉体を含有した水中油型化粧料に関し、更に詳しくは、使用感や安定性に優れた油中水型化粧料に関するものである。
【0002】
【従来の技術】
従来より微粒子粉体は凝集力が強く、多量の粉体分散剤を用いてビーズミル等のメディア式湿式分散処理を行い、化粧料に含有しなければならなかった。粉体分散剤として用いられるものは、高い分散性を有する高分子量の界面活性剤が優位に選択され得るが、多量に含有すると使用感触上「べたつき」や「のびが悪い」等に感じる場合があり、また逆に使用感の向上を目的として、粉体分散剤の含有量を少なくすると、粉体同士が凝集してしまい、その結果、製品の粘度上昇やゲル化、排液などの現象が生じる場合があった。
特に水中油型化粧料においては、粉体分散剤を用いると乳化系に影響を及ぼし、乳化時の乳化不良や、経時での乳化滴の凝集や合一を引き起こす事があった。
【0003】
近年、日焼け止め化粧料等においてSPF値(紫外線防御指数)の高い商品が上市されているが、それらは紫外線吸収剤と酸化チタンや酸化亜鉛などの微粒子粉体を併用して含有させている場合が多く、SPF値を向上させる為、微粒子粉体を高分散させた状態で含有させているのがほとんどである。また、微粒子粉体を含有させる場合、水系に分散させると使用感触上「きしみ感」等を感じる場合があり、油系に分散させる方が、感触上好ましく、さらに水中油型乳化系であれば、水々しさ等の感触も得る事が可能であり、有用である。油系に微粒子粉体を分散させる技術については、旧来より様々な提案がなされてきており、表面処理粉体とシリコン油と特定のシリコン系界面活性剤の組合せで安定な油中水型エマルジョンを得る方法として特開昭63−215615号公報や、有機ケイ素化合物により表面処理された微粒子粉体とシリコンオイルと特定のシリコン系界面活性剤の組合せで安定な油中水型エマルジョンを得る方法として特開平2001−278737号公報等の提案があった。しかしこれらは、油中水型であり、水々しさなどの使用感について十分満足できる化粧料を得るには困難な状況であった。また、表面処理粉体とシリコン油と特定のシリコン系界面活性剤の組合せで安定な水中油型エマルジョンを得る方法として特開昭63−246312号公報等の提案があるが、これらについては粉体に対する表面処理剤の量が十分でない場合あり、良好な経時安定性が得られないことがあった。
【0004】
従って、微粒子粉体を含有する水中油型化粧料においても、経時安定性に優れたものだけでなく、使用感も優れた品質の化粧料の開発が望まれていた。
【0005】
【発明が解決しようとする課題】
本発明は、有機ケイ素化合物により表面処理された微粒子粉体を配合し、のびが軽く、べたつきの無い使用感に優れた、経時安定性の良好な水中油型化粧料を提供することをその課題とする。
【0006】
【課題を解決するための手段】
かかる事情に鑑み、本発明者は上記課題を解決すべく鋭意検討を行った結果、特定量の有機ケイ素化合物で表面処理した微粒子粉体、シリコンオイル、アニオン性界面活性剤及び/又はリン脂質及び水を含有する水中油型化粧料が、使用感(のびの軽さ、べたつきの無さ)に優れ、経時安定性も良好なことを見出し、本発明を完成するに至った。
【0007】
すなわち本発明は、(a)自重の10〜30質量%の有機ケイ素化合物で表面処理された微粒子粉体、(b)シリコンオイル、(c)アニオン性界面活性剤及び/又はリン脂質、(d)水を含有する水中油型化粧料である。更に、(c)成分のアニオン性界面活性剤が、ポリオキシエチレンアルキルエーテルリン酸エステル塩、Nアシルメチルタウリン塩である水中油型化粧料である。更に、(a)成分中の有機ケイ素化合物が反応性アルキルポリシロキサンである水中油型化粧料である。更に、(a)成分中の有機ケイ素化合物が反応性アルキルポリシロキサン、及びメチルハイドロジェンポリシロキサンである水中油型化粧料である。更に、(a)成分の表面処理微粒子粉体を1〜30質量%含有する水中油型化粧料である。更に、(a)成分の表面処理微粒子粉体が更に脂肪酸により表面処理されている水中油型化粧料である。更に、(b)成分のシリコンオイルが揮発性のシリコンオイルである水中油型化粧料である。更に、(a)成分の表面処理微粒子粉体が、酸化チタン、酸化亜鉛、酸化セリウムである水中油型化粧料である。
【0008】
【発明の実施の形態】
以下、本発明の構成について説明する。
本発明に用いられる成分(a)の有機ケイ素化合物で表面処理された微粒子粉体は、主に油系中に含有されるものであり、その目的は粉体の種類によって異なるが、紫外線の防御効果、着色、感触調整等を目的とするものである。
【0009】
本発明に用いられる成分(a)の有機ケイ素化合物で表面処理された微粒子粉体において、処理される粉体(母粉体)としては1〜500nmのものであれば特に限定されるものではないが、好ましくは5〜100nmである。本発明に用いられる粉体を具体的に例示するのであれば、紫外線の防御効果のある微粒子粉体として、酸化チタン、酸化亜鉛、酸化ジルコニウム、酸化セリウム等が挙げられ、また着色剤として、酸化鉄等、感触調整剤として、無水シリカ、酸化バリウム等が挙げられる。これらの粉体の形状としては、球状、針状、紡錘状、板状、薄片状等が挙げられる。これらの中でも有機ケイ素化合物よる処理効果の高い微粒子粉体としては、表面活性の強い、酸化チタン、酸化亜鉛、酸化セリウムを例示する事ができる。またこれらの粉体は表面活性を低減させる事を目的として、シリカ、アルミナ、ジルコニア等の無機成分により処理されていても良い。これらの有機ケイ素化合物で表面処理された微粒子粉体は、必要に応じて一種、又は二種以上を組み合わせて用いることができる。
【0010】
本発明に用いられる成分(a)の有機ケイ素化合物で表面処理された微粒子粉体の表面処理量は、自重の10〜30質量%(以下、単に「%」と記す)であり、より好ましくは13〜20%である。表面処理剤の処理量としては、自重の10%未満では、粉体の分散媒への「ぬれ」が悪く、十分な分散性を得ることが出来ない場合があり、自重の30%を超える場合には、過剰な表面処理剤が、系全体の経時安定性に悪影響を及ぼす場合がある。
【0011】
本発明に用いられる成分(a)の有機ケイ素化合物としては、アルコキシ変性ポリシロキサン、カルボキシ変性ポリシロキサン、エポキシ変性ポリシロキサン、アミノ変性ポリシロキサン、メチルハイドロジェンポリシロキサン等が挙げられる。より具体的に例示するのであれば、特開平11−148028公報に記載の下記一般式(1)により表されるメチルハイドロジェンポリシロキサン、及び特開平7−196946公報記載の下記一般式(2)により表される反応性アルキルポリシロキサンが挙げられる。これらの有機ケイ素化合物は必要に応じて、一種又は二種以上を組み合わせて用いることができる。
【化1】

Figure 0003770600
(m、nはそれぞれ整数で、m+n=7〜50、m:n=1:0.2〜1:4)
【化2】
Figure 0003770600
(Rは互いに独立してアルキル基(メチル、エチル、プロピル等)を表し、Xはアミノ水素基(NH,NH)、ハロゲン原子、水酸基またはアルコキシ基を表し、Yは直接結合、または二価の炭化水素基(メチレン、エチレン、ブチレン等)を表し、それらの水素原子はその他の置換基により置換されていてもよく、pは1〜3の整数を表し、そしてqは25ないし100を表す)
【0012】
本発明では、通常化粧品に用いられるシリコンオイル以外の油剤との相溶性の更なる向上を目的として有機ケイ素化合物処理剤の上に更に脂肪酸による粉体表面処理を行うことも可能である。
【0013】
本発明に用いられる脂肪酸を具体的に例示するのであれば、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、イソステアリン酸等を挙げることができ、その処理量は、脂肪酸/微粒子粉体=0.1/10〜1/5であれば、効果を期待できる。これらの脂肪酸は必要に応じて、一種又は二種以上を組み合わせて用いることができる。
【0014】
本発明に用いられる成分(a)の有機ケイ素化合物表面処理微粒子粉体の含有量は、特に限定されるものではないが、1〜30質量%(以下、単に「%」と記す)が好ましく、より好ましくは5〜20%である。
【0015】
本発明に用いられる成分(b)のシリコンオイルは、成分(a)の粉体の分散性を向上させる事及びのび広がりの良さやべたつきの無さなどの使用感向上を目的として含有されるものであり、具体的に例示するのであれば、直鎖型ジメチルポリシロキサン、分岐型ジメチルポリシロキサン、環状ジメチルポリシロキサン、メチルフェニルポリシロキサン、パーフルオロポリシロキサン等であり、なかでも、分散向上性を得られやすいという観点から、粉体に処理される有機ケイ素化合物と親和性の高い不揮発性の直鎖型ジメチルポリシロキサンや揮発性の環状あるいは直鎖型のジメチルポリシロキサンを好ましいものとして挙げる事ができる。これらのシリコンオイルは必要に応じて一種、又は二種以上を組み合わせて用いることができる。成分(b)のシリコンオイルの含有量は、特に限定されるものではないが、1〜50%が好ましく、より好ましくは5〜30%である。
【0016】
本発明に用いられる成分(c)のアニオン性界面活性剤及び/又はリン脂質は、水中油型化粧料の乳化剤として含有されるものである。また成分(c)のアニオン性界面活性剤及び/又はリン脂質は、成分(a)の有機ケイ素化合物表面処理微粒子粉体の分散安定性向上に寄与し、水中油型化粧料の経時安定性を著しく向上させる。更に、使用時のべたつきの無さなどの使用感向上にも寄与する。本発明に用いられる成分(c)のアニオン性界面活性剤は、通常化粧料で使用されているものであれば特に限定されないが、具体的に例示するのであれば、ラウリン酸、ミリスチン酸、パルミチン酸、ステアリン酸、イソステアリン酸などの脂肪酸のナトリウム塩またはトリエタノールアミン塩、ココイルメチルタウリンナトリウム、ラウロイルメチルタウリンナトリウム、ミリストイルメチルタウリンナトリウム、パルミトイルメチルタウリンナトリウム、ステアロイルメチルタウリンナトリウムなどのNアシルメチルタウリン塩、ポリオキシエチレンラウリルエーテルリン酸、ポリオキシエチレンセチルエーテルリン酸、ポリオキシエチレンオレイルエーテルリン酸、ポリオキシエチレンノニルフェニルエーテルリン酸などのポリオキシエチレンアルキルエーテルリン酸エステル及びその塩などが挙げられる。これらの中でも、経時安定性及び使用感向上効果の観点から、ポリオキシエチレンアルキルエーテルリン酸エステル塩、Nアシルメチルタウリン塩が好ましい。また、成分(c)のリン脂質は、通常化粧料で使用されているものであれば特に限定されないが、具体的に例示するのであれば、ホスファチジルコリン、ホスファチジルエタノールアミン、ホスファチジルセリン、ホスファチジルグリセロール、ホスファチジルイノシトール、スフィンゴリン脂質、大豆レシチン、卵黄レシチン、あるいはそれらの水素添加物等のリン脂質及びリン脂質・コレステロール複合体、リン脂質・フィトステロール複合体等のリン脂質複合体を挙げることができる。これらの成分(c)アニオン性界面活性剤及び/又はリン脂質は、必要に応じて一種又は二種以上を適宜選択して用いることができる。
【0017】
本発明に用いられる成分(c)のアニオン性界面活性剤及び/又はリン脂質の含有量は、特に限定されるものではないが、0.1〜10%が好ましく、より好ましくは1〜5%である。
【0018】
本発明に用いられる成分(d)の水は、水性成分の溶媒、及び感触上の水々しさを得る事を目的として含有されるものである。
【0019】
本発明の水中油型化粧料は、上記必須成分に加え、更に通常の化粧料に用いられる成分、具体的には、上述以外の界面活性剤、水溶性高分子、多価アルコ−ル、低級アルコ−ル、酸化防止剤、殺菌剤、防腐剤、香料、pH調整剤、ワックス、油系ゲル化剤、美容成分等を本発明の効果を損なわない範囲で使用することができる。本発明の水中油型化粧料は、通常の化粧料を製造する方法にて得られるものであり、その製造方法は、特に限定されるものではない。
【0020】
本発明の水中油型化粧料は、上記必須成分の組合せを用いた時にのみ、優れた効果が得られるものである。すなわち、特定比率で表面処理された微粒子粉体である成分(a)は、成分(b)であるシリコンオイルを含む油系中に、容易に分散が可能であり、感触上べたつきと感じる場合もある分散安定化剤を使用せずに、または限りなく低減させる事ができる。またアニオン性界面活性剤及び/又はリン脂質である成分(c)は、成分(a)、(b)を含む油系成分を水系中に適度に乳化する事が可能である。つまり、本発明の水中油型化粧料は、本組合せを用いた時にのみ、使用時ののびが軽く、使用後のべたつきを感じる事もなく、さらに経時安定性が良好であり、他の組合せでは成し得ない優れた機能を有するものである。
【0021】
本発明の水中油型化粧料は、美容液、日焼け止め料、マッサージ料、メイクアップ料、メイクアップ用下地料等に適用することができる。
【0022】
【実施例】
次に、実施例を挙げて本発明をさらに詳細に説明するが、本発明はこれらによりなんら制約されるものではない。
【0023】
有機ケイ素化合物表面処理微粒子粉体組成例1〜8を表1に、表面処理粉体を配合した水中油型化粧料の実施例1〜6及び比較例1〜3を表2に示す。得られた水中油型化粧料について経時安定性(ゲル化)、使用感(のびの軽さ、べたつきの無さ)を評価し、結果を表2に併せて示す。
【0024】
【表1】
Figure 0003770600
【0025】
【表2】
Figure 0003770600
【0026】
<製造方法>
A.成分(1)〜(11)を70℃にて、均一に混合分散する。
B.成分(12)〜(16)を70℃にて、均一に混合する。
C.A成分にB成分を加え乳化し、冷却して水中油型化粧料を得る。
【0027】
(評価方法:経時安定性(ゲル化))
各試料を40℃の恒温槽に3ヶ月間保管し、調製直後の状態を基準として、外観の変化(ゲル化)を以下の(イ)4段階判定基準を用いて判定した。
【0028】
Figure 0003770600
【0029】
(評価方法:使用感)
専門評価パネル10名により、各試料について、使用感(のびの軽さ、べたつきの無さ)を、下記(ロ)評価基準にて5段階評価し、更に各試料の評点の平均値を(ハ)4段階判定基準を用いて判定した。
【0030】
Figure 0003770600
【0031】
表2の結果から明らかなように本発明の実施例1〜6の水中油型化粧料は比較例1〜3と比較してゲル化せず経時安定性に優れ、且つ使用時ののびが軽く、べたつきもない優れた優れた水中油型化粧料であった。
【0032】
Figure 0003770600
【0033】
<製造方法>
A.成分(1)〜(10)を70℃にて、均一に混合分散する。
B.成分(11)〜(15)を70℃にて、均一に混合する。
C.A成分にB成分を加え乳化し、冷却して日焼け止め料を得る。
【0034】
実施例7で得られた、日焼け止め料は経時安定性に優れ、且つ使用時ののびが軽く、べたつきもない優れた日焼け止め料であった。
【0035】
Figure 0003770600
【0036】
<製造方法>
A.成分(1)〜(10)を70℃にて、均一に混合分散する。
B.成分(11)〜(14)を70℃にて、均一に混合する。
C.A成分にB成分を加え乳化し、冷却して日焼け止め料を得る。
【0037】
実施例8で得られた、日焼け止め料は経時安定性に優れ、且つ使用時ののびが軽く、べたつきもない優れた優れた日焼け止め料であった。
【0038】
Figure 0003770600
【0039】
<製造方法>
A.成分(1)〜(12)を70℃にて、均一に混合分散する。
B.成分(13)〜(17)を70℃にて、均一に混合する。
C.A成分にB成分を加え乳化し、冷却して日焼け止め料を得る。
【0040】
実施例9で得られた、日焼け止め料は経時安定性に優れ、且つ使用時ののびが軽く、べたつきもない優れた優れた日焼け止め料であった。
【0041】
【発明の効果】
以上詳述した如く、本発明の水中油型化粧料は、使用感(のびの軽さ、べたつきの無さ)に優れ、経時安定性も良好なものである。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-in-water cosmetic containing a surface-treated fine particle powder, and more particularly to a water-in-oil cosmetic having excellent usability and stability.
[0002]
[Prior art]
Conventionally, the fine particle powder has a strong cohesive force and has to be contained in cosmetics by performing a media-type wet dispersion treatment such as a bead mill using a large amount of a powder dispersant. A high molecular weight surfactant having a high dispersibility can be selected preferentially as a powder dispersant, but if it is contained in a large amount, it may feel “sticky” or “badly spread” on use. On the other hand, if the content of the powder dispersant is decreased for the purpose of improving the feeling of use, the powder aggregates, resulting in phenomena such as an increase in the viscosity of the product, gelation, and drainage. There was a case.
Particularly in oil-in-water cosmetics, the use of a powder dispersant has an effect on the emulsification system and may cause emulsification failure during emulsification and aggregation or coalescence of emulsified droplets over time.
[0003]
In recent years, products with a high SPF value (ultraviolet ray protection index) have been put on the market in sunscreen cosmetics, etc., but they contain a combination of an ultraviolet absorber and fine particle powder such as titanium oxide or zinc oxide. In order to improve the SPF value, the fine particle powder is mostly contained in a highly dispersed state. In addition, when the fine particle powder is contained, if it is dispersed in an aqueous system, it may feel "squeaky" or the like on use feeling, and it is preferable to disperse in an oil system. It is also possible to obtain a feel such as wateriness, which is useful. Various proposals have been made for the technology of dispersing fine-particle powder in oil systems, and a stable water-in-oil emulsion can be obtained by combining a surface-treated powder, silicon oil, and a specific silicone surfactant. As a method for obtaining a stable water-in-oil emulsion, JP-A-63-215615 or a combination of fine particle powder surface-treated with an organosilicon compound, silicon oil, and a specific silicon surfactant is used. There were proposals such as Kaihei 2001-278737. However, these are water-in-oil types, and it has been difficult to obtain cosmetics that are sufficiently satisfactory in terms of use feeling such as wateriness. Further, as a method for obtaining a stable oil-in-water emulsion with a combination of surface-treated powder, silicon oil, and a specific silicon-based surfactant, there is a proposal in Japanese Patent Application Laid-Open No. 63-246312. In some cases, the amount of the surface treatment agent is not sufficient, and good stability over time may not be obtained.
[0004]
Therefore, in oil-in-water cosmetics containing fine particle powders, it has been desired to develop cosmetics having not only excellent stability over time but also excellent usability.
[0005]
[Problems to be solved by the invention]
It is an object of the present invention to provide an oil-in-water cosmetic that is blended with a fine particle powder surface-treated with an organosilicon compound, is light in spread, has an excellent feeling of use without stickiness, and has good temporal stability. And
[0006]
[Means for Solving the Problems]
In view of such circumstances, the present inventor has intensively studied to solve the above problems, and as a result, fine particle powder, silicon oil, anionic surfactant and / or phospholipid surface-treated with a specific amount of an organosilicon compound, and It has been found that an oil-in-water cosmetic containing water has excellent usability (lightness of spread, no stickiness) and good stability over time, and has completed the present invention.
[0007]
That is, the present invention relates to (a) fine particle powder surface-treated with an organosilicon compound of 10 to 30% by mass of its own weight, (b) silicon oil, (c) an anionic surfactant and / or phospholipid, (d ) It is an oil-in-water cosmetic containing water. Furthermore, the anionic surfactant of the component (c) is an oil-in-water cosmetic in which a polyoxyethylene alkyl ether phosphate ester salt and an N acylmethyl taurate salt are used. Furthermore, it is an oil-in-water cosmetic in which the organosilicon compound in component (a) is a reactive alkylpolysiloxane. Furthermore, it is an oil-in-water cosmetic in which the organosilicon compound in component (a) is a reactive alkylpolysiloxane and methylhydrogenpolysiloxane. Furthermore, it is an oil-in-water cosmetic containing 1 to 30% by mass of the surface-treated fine particle powder of component (a). Furthermore, the surface-treated fine particle powder of the component (a) is an oil-in-water cosmetic that is further surface-treated with a fatty acid. Furthermore, it is an oil-in-water type cosmetic in which the silicone oil as component (b) is a volatile silicone oil. Furthermore, the surface-treated fine particle powder of component (a) is an oil-in-water cosmetic in which titanium oxide, zinc oxide, and cerium oxide are used.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the present invention will be described below.
The fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention is mainly contained in an oil system, and its purpose varies depending on the kind of the powder, but it is an ultraviolet protection. It is intended for effect, coloring, feel adjustment and the like.
[0009]
In the fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention, the treated powder (base powder) is not particularly limited as long as it is 1 to 500 nm. However, it is preferably 5 to 100 nm. If the powder used in the present invention is specifically exemplified, the fine particle powder having an ultraviolet ray-protecting effect includes titanium oxide, zinc oxide, zirconium oxide, cerium oxide, and the like, and the colorant is oxidized. Examples of the feel control agent such as iron include anhydrous silica and barium oxide. Examples of the shape of these powders include a spherical shape, a needle shape, a spindle shape, a plate shape, and a flake shape. The high particle powders of treatment effect by the organic silicon compound Among these, strong surface activity, titanium oxide, zinc oxide, can be exemplified cerium oxide. These powders may be treated with inorganic components such as silica, alumina and zirconia for the purpose of reducing surface activity. The fine particle powder surface-treated with these organosilicon compounds can be used alone or in combination of two or more as required.
[0010]
The surface treatment amount of the fine particle powder surface-treated with the organosilicon compound of component (a) used in the present invention is 10 to 30% by mass (hereinafter simply referred to as “%”), more preferably. 13 to 20%. When the amount of the surface treatment agent is less than 10% of its own weight, the powder may not be “wet” in the dispersion medium, and sufficient dispersibility may not be obtained. In some cases, an excessive surface treatment agent may adversely affect the temporal stability of the entire system.
[0011]
Examples of the organosilicon compound of component (a) used in the present invention include alkoxy-modified polysiloxane, carboxy-modified polysiloxane, epoxy-modified polysiloxane, amino-modified polysiloxane, and methylhydrogen polysiloxane. More specifically, methyl hydrogen polysiloxane represented by the following general formula (1) described in JP-A-11-148028 and the following general formula (2) described in JP-A-7-196946 The reactive alkyl polysiloxane represented by these is mentioned. These organosilicon compounds can be used singly or in combination of two or more as required.
[Chemical 1]
Figure 0003770600
(M and n are integers, m + n = 7 to 50, m: n = 1: 0.2 to 1: 4)
[Chemical 2]
Figure 0003770600
(R independently represents an alkyl group (methyl, ethyl, propyl, etc.), X represents an amino hydrogen group (NH, NH 2 ), a halogen atom, a hydroxyl group or an alkoxy group, and Y represents a direct bond or a divalent group. The hydrogen atom of which may be substituted by other substituents, p represents an integer of 1 to 3, and q represents 25 to 100 )
[0012]
In the present invention, a powder surface treatment with a fatty acid can be further performed on the organosilicon compound treating agent for the purpose of further improving the compatibility with an oil agent other than silicon oil usually used in cosmetics.
[0013]
Specific examples of the fatty acid used in the present invention include lauric acid, myristic acid, palmitic acid, stearic acid, isostearic acid and the like, and the processing amount thereof is fatty acid / fine particle powder = 0. If it is 1/10 to 1/5, an effect can be expected. These fatty acids can be used alone or in combination of two or more as required.
[0014]
The content of the organosilicon compound surface-treated fine particle powder of the component (a) used in the present invention is not particularly limited, but is preferably 1 to 30% by mass (hereinafter simply referred to as “%”), More preferably, it is 5 to 20%.
[0015]
The component (b) silicone oil used in the present invention is contained for the purpose of improving the dispersibility of the powder of the component (a) and improving the feeling of use such as good spreading and no stickiness. Specific examples include linear dimethylpolysiloxane, branched dimethylpolysiloxane, cyclic dimethylpolysiloxane, methylphenylpolysiloxane, perfluoropolysiloxane, etc. From the viewpoint of being easily obtained, non-volatile linear dimethylpolysiloxane and volatile cyclic or linear dimethylpolysiloxane having high affinity with the organosilicon compound to be processed into the powder may be mentioned as preferable ones. it can. These silicone oils can be used singly or in combination of two or more as required. Although content of the silicone oil of a component (b) is not specifically limited, 1 to 50% is preferable, More preferably, it is 5 to 30%.
[0016]
The anionic surfactant and / or phospholipid of component (c) used in the present invention is contained as an emulsifier for oil-in-water cosmetics. In addition, the anionic surfactant and / or phospholipid of component (c) contributes to improving the dispersion stability of the surface-treated fine particles of the organosilicon compound of component (a), and improves the temporal stability of the oil-in-water cosmetic. Remarkably improve. Furthermore, it contributes to an improvement in feeling of use such as no stickiness during use. The anionic surfactant of the component (c) used in the present invention is not particularly limited as long as it is usually used in cosmetics, but if specifically exemplified, lauric acid, myristic acid, palmitic acid are used. Acid, stearic acid, isostearic acid sodium salt or triethanolamine salt, cocoyl methyl taurine sodium, lauroyl methyl taurine sodium, myristoyl methyl taurine sodium, palmitoyl methyl taurine sodium, stearoyl methyl taurine sodium Polyoxyethylene lauryl ether phosphate, polyoxyethylene cetyl ether phosphate, polyoxyethylene oleyl ether phosphate, polyoxyethylene nonylphenyl ether phosphate, etc. Such as Chi alkylether phosphoric acid esters and salts thereof. Among these, polyoxyethylene alkyl ether phosphate ester salts and N acylmethyl taurate salts are preferable from the viewpoints of the stability over time and the usability improvement effect. In addition, the phospholipid of component (c) is not particularly limited as long as it is usually used in cosmetics, but if specifically exemplified, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphatidylglycerol, phosphatidyl Examples thereof include phospholipids such as inositol, sphingophospholipid, soybean lecithin, egg yolk lecithin, and hydrogenated products thereof, and phospholipid complexes such as phospholipid / cholesterol complex and phospholipid / phytosterol complex. These components (c) anionic surfactants and / or phospholipids can be used by appropriately selecting one kind or two or more kinds as necessary.
[0017]
The content of the anionic surfactant and / or phospholipid of the component (c) used in the present invention is not particularly limited, but is preferably 0.1 to 10%, more preferably 1 to 5%. It is.
[0018]
The water of the component (d) used in the present invention is contained for the purpose of obtaining a solvent of an aqueous component and wateriness on touch.
[0019]
In addition to the above essential components, the oil-in-water cosmetic of the present invention further includes components used in ordinary cosmetics, specifically surfactants other than those mentioned above, water-soluble polymers, polyhydric alcohols, lower Alcohols, antioxidants, bactericides, preservatives, fragrances, pH adjusters, waxes, oil-based gelling agents, cosmetic ingredients, and the like can be used as long as the effects of the present invention are not impaired. The oil-in-water cosmetic of the present invention is obtained by a method for producing a normal cosmetic, and the production method is not particularly limited.
[0020]
The oil-in-water cosmetic of the present invention can provide excellent effects only when the combination of the above essential components is used. That is, the component (a), which is a fine particle powder surface-treated at a specific ratio, can be easily dispersed in an oil system containing silicon oil as the component (b), and may feel sticky on the touch. It can be reduced without or using some dispersion stabilizer. In addition, the component (c) which is an anionic surfactant and / or phospholipid can appropriately emulsify the oil component containing the components (a) and (b) in the aqueous system. In other words, the oil-in-water cosmetic of the present invention is light when used only when this combination is used, does not feel sticky after use, and has better stability over time. It has excellent functions that cannot be achieved.
[0021]
The oil-in-water cosmetic of the present invention can be applied to beauty liquids, sunscreens, massages, makeups, makeup bases, and the like.
[0022]
【Example】
Next, although an Example is given and this invention is demonstrated further in detail, this invention is not restrict | limited at all by these.
[0023]
Organosilicon compound surface-treated fine particle powder composition examples 1 to 8 are shown in Table 1, and Examples 1 to 6 and Comparative Examples 1 to 3 of oil-in-water cosmetics containing the surface-treated powder are shown in Table 2. The obtained oil-in-water cosmetics were evaluated for stability over time (gelation) and usability (lightness of spread, no stickiness), and the results are also shown in Table 2.
[0024]
[Table 1]
Figure 0003770600
[0025]
[Table 2]
Figure 0003770600
[0026]
<Manufacturing method>
A. Components (1) to (11) are uniformly mixed and dispersed at 70 ° C.
B. Ingredients (12) to (16) are uniformly mixed at 70 ° C.
C. The B component is added to the A component, emulsified, and cooled to obtain an oil-in-water cosmetic.
[0027]
(Evaluation method: Stability over time (gelation))
Each sample was stored in a constant temperature bath at 40 ° C. for 3 months, and the change in appearance (gelation) was determined using the following four-step criteria based on the state immediately after preparation.
[0028]
Figure 0003770600
[0029]
(Evaluation method: feeling of use)
Ten professional evaluation panels evaluated the feeling of use (lightness of spread, no stickiness) for each sample in five levels according to the following (b) evaluation criteria, and the average value of the scores of each sample (ha ) Judgment was made using a 4-step criterion.
[0030]
Figure 0003770600
[0031]
As is apparent from the results in Table 2, the oil-in-water cosmetics of Examples 1 to 6 of the present invention do not gel and have excellent temporal stability compared to Comparative Examples 1 to 3, and lightly spread during use. It was an excellent oil-in-water cosmetic with no stickiness.
[0032]
Figure 0003770600
[0033]
<Manufacturing method>
A. Components (1) to (10) are uniformly mixed and dispersed at 70 ° C.
B. Ingredients (11) to (15) are uniformly mixed at 70 ° C.
C. Add B component to A component, emulsify, and cool to obtain sunscreen.
[0034]
The sunscreen obtained in Example 7 was an excellent sunscreen that was excellent in stability over time, lightly spread during use, and without stickiness.
[0035]
Figure 0003770600
[0036]
<Manufacturing method>
A. Components (1) to (10) are uniformly mixed and dispersed at 70 ° C.
B. Ingredients (11) to (14) are uniformly mixed at 70 ° C.
C. Add B component to A component, emulsify, and cool to obtain sunscreen.
[0037]
The sunscreen obtained in Example 8 was an excellent sunscreen with excellent stability over time, light spread during use, and no stickiness.
[0038]
Figure 0003770600
[0039]
<Manufacturing method>
A. Components (1) to (12) are uniformly mixed and dispersed at 70 ° C.
B. Ingredients (13) to (17) are uniformly mixed at 70 ° C.
C. Add B component to A component, emulsify, and cool to obtain sunscreen.
[0040]
The sunscreen obtained in Example 9 was an excellent sunscreen with excellent stability over time, light spread during use, and no stickiness.
[0041]
【The invention's effect】
As described above in detail, the oil-in-water cosmetic of the present invention is excellent in feeling of use (lightness of spread, no stickiness) and has good stability over time.

Claims (5)

次の成分(a)〜(d);
(a)自重の10〜30質量%のアルコキシ変性ポリシロキサン、カルボキシ変性ポリシロキサン、エポキシ変性ポリシロキサン、アミノ変性ポリシロキサン、メチルハイドロジェンポリシロキサンからなる群から選ばれる1種又は2種以上の有機ケイ素化合物で表面処理された微粒子粉体
(b)シリコンオイル
(c)Nアシルメチルタウリン塩
(d)水
を含有することを特徴とする水中油型化粧料。
The following components (a) to (d);
(A) One or more organic compounds selected from the group consisting of alkoxy-modified polysiloxanes, carboxy-modified polysiloxanes, epoxy-modified polysiloxanes, amino-modified polysiloxanes, and methylhydrogen polysiloxanes having a weight of 10 to 30% by weight An oil-in-water cosmetic comprising a fine particle powder surface-treated with a silicon compound (b) silicon oil (c) N acylmethyl taurine salt (d) water.
(a)成分の表面処理微粒子粉体を1〜30質量%含有することを特徴とする請求項1に記載の水中油型化粧料。The oil-in-water cosmetic according to claim 1, comprising 1 to 30% by mass of the surface-treated fine particle powder of component (a). (a)成分の表面処理微粒子粉体が更に脂肪酸により表面処理されることを特徴とする請求項1又は2記載の水中油型化粧料。The oil-in-water cosmetic according to claim 1 or 2, wherein the surface-treated fine particle powder of component (a) is further surface-treated with a fatty acid. (b)成分のシリコンオイルが揮発性のシリコンオイルであることを特徴とする請求項1〜3のいずれかの一項に記載の水中油型化粧料。The oil-in-water cosmetic according to any one of claims 1 to 3, wherein the silicone oil as component (b) is volatile silicone oil. (a)成分の表面処理微粒子粉体が、酸化チタン、酸化亜鉛、酸化セリウムであることを特徴とする請求項1〜4のいずれかの一項に記載の水中油型化粧料。The oil-in-water cosmetic according to any one of claims 1 to 4, wherein the surface-treated fine particle powder of component (a) is titanium oxide, zinc oxide, or cerium oxide.
JP2002095117A 2002-03-29 2002-03-29 Oil-in-water cosmetic Expired - Lifetime JP3770600B2 (en)

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