JP3756484B2 - Cosmetics for concealing uneven parts - Google Patents

Cosmetics for concealing uneven parts Download PDF

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Publication number
JP3756484B2
JP3756484B2 JP2002379371A JP2002379371A JP3756484B2 JP 3756484 B2 JP3756484 B2 JP 3756484B2 JP 2002379371 A JP2002379371 A JP 2002379371A JP 2002379371 A JP2002379371 A JP 2002379371A JP 3756484 B2 JP3756484 B2 JP 3756484B2
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Japan
Prior art keywords
oil
swelling
absorbing polymer
concealing
cosmetic
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JP2004210655A (en
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一夫 桑原
博美 南部
誠 辻
泰輔 青崎
亨 菅原
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Kao Corp
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Kao Corp
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Description

【0001】
【発明の属する技術分野】
本発明は皮膚の凹凸部隠しとして有用な化粧料に関し、更に詳しくは、シワや毛穴を簡単に隠蔽するための凹凸部隠し用化粧料及び凹凸部隠し方法に関する。
【0002】
【従来の技術】
従来から女性のシワに関する悩みは多く、シワ隠しの様々な化粧料が開発されてきた。例えば、特許文献1では、高重合度メチルポリシロキサンと揮発性油剤と半透明粉体を含有することを特徴とする、シワ隠し用の乳化化粧料を開示しており、不自然さのないシワ隠しを課題としている。また、特許文献2では、粉体、被膜形成剤、揮発性溶剤を含有し、一定の乾燥皮膚表面の表面粗さを有する化粧料を開示しており、肌上でのつきがよく、自然な仕上がりで、肌の凹凸を見えにくくすることができる。しかしこれらは、小さなシワは隠れるものの、女性が最も気にしている、例えば250μm以上の皮溝を有する大きなシワまで隠すことは困難であった。
【0003】
【特許文献1】
特開2000−7551号公報
【特許文献2】
特開2002−179530号公報
【0004】
【発明が解決しようとする課題】
本発明の課題は、大きなシワや毛穴迄きれいに隠し、見た目や感触の違和感のない凹凸部隠し用化粧料及び凹凸部隠し方法を提供することである。
【0005】
【課題を解決するための手段】
本発明は、含油量が飽和吸油量未満の状態の膨潤型吸油性ポリマー粒子と、皮膜形成性を有するポリマー又は粘着性を有するポリマーからなるバインダーとを含有する、凹凸部隠し用化粧料、並びにこの凹凸部隠し用化粧料を皮膚上に塗布後、膨潤型吸油性ポリマー粒子を膨潤させることが出来る油性成分を含む化粧料を、前記塗布部位に接触させる、皮膚の凹凸部隠し方法を提供する。
【0006】
【発明の実施の形態】
[膨潤型吸油性ポリマー]
本発明に用いられる膨潤型吸油性ポリマーとしては、油を吸収し膨潤するようなポリマーであれば組成は特に限定されない。油を吸収するために、架橋構造を有していることが好ましい。
【0007】
本発明に用いられる膨潤型吸油性ポリマーは、形状に限定されず、真球状、卵型、塊状等の粒子状が好ましく挙げられるが、その他、燐片状、板状、繊維状、微粒子集合体状(造粒状)、不定形状のいずれも用いることができる。これらの粒子は、多孔性であってもよい。
【0008】
粒子状膨潤型吸油性ポリマーの未膨潤状態の平均粒径は、好ましくは0.01μm以上、更に好ましくは0.1μm以上であり、特に好ましくは1μm以上である。上限は、100μm以下が好ましく、更に好ましくは50μm以下である。この範囲内では、ポリマー粒子の粒状感が感じられず、外観上不自然に見えない。ここで未膨潤状態の平均粒径とは、光散乱式粒径測定装置(例えば、コールター社製LS−230型(分散媒:膨潤しない溶剤)、堀場製作所製LA−910(分散媒:水))にて、測定することにより得られる未膨潤状態での平均粒径である。
【0009】
粒子状膨潤型吸油性ポリマーの飽和膨潤状態の平均粒径は、好ましくは0.01μm以上、更に好ましくは0.1μm以上であり、特に好ましくは1μm以上である。上限は、100μm以下が好ましく、更に好ましくは30μm以下である。この範囲内では、ポリマー粒子がシワ等の皮溝に入り、シワを隠す効果に優れると共に、外観上不自然に見えない。飽和膨潤状態の平均粒径は、吸油性ポリマー粒子をスライドグラスに取り、過剰のスクアラン(ポリマーを構成する繰り返し単位の50質量%以上がケイ素原子を含有するシリコーン系ポリマーの場合は、デカメチルシクロペンタシロキサン)を滴下し、吸油性ポリマー粒子を飽和膨潤させ、キーエンス社製デジタルマイクロスコープVH−8000を用い拡大画像を取り、粒子50個の粒径を計測し、求めることができる。
【0010】
膨潤型吸油性ポリマーの吸油量は、以下に示す測定方法により、膨潤型吸油性ポリマー1gあたり、1g以上の膨潤可能な油を保持できるもの(吸油量:1g/g以上)が好ましく、2g/g以上のものが更に好ましく、5g/g以上のものが特に好ましい。上限は、200g/g以下のものが好ましく、100g/g以下のものが更に好ましい。この範囲内では、シワを隠す効果に優れ、外観上不自然に見えない。
【0011】
<吸油量の測定方法>
膨潤型吸油性ポリマーの吸油量は、膨潤型吸油性ポリマー1gを遠心分離用遠心管に入れ、添加量を秤量し、正確に秤量した大過剰の膨潤可能な油を加え、12時間振とうした後、遠心分離器によりポリマー相と液体相を分離し、液体相のみを取り出し秤量し、ポリマーに吸収された油の量を算出し、ポリマー1gあたりの吸油量を求めた。吸油量の測定は、基本的に、油としてスクアランを用いるが、ポリマーを構成する繰り返し単位の50質量%以上がケイ素原子を含有するシリコーン系ポリマーの場合、油としてデカメチルシクロペンタシロキサンを用いる。
【0012】
具体的な吸油性ポリマーとしては、架橋ポリ(メタ)アクリル酸エステル(但し、(メタ)アクリル酸とは、アクリル酸、メタクリル酸又はそれらの混合物を意味する)に代表されるアクリル系(共)重合体;ポリウレタン、アクリル−ポリウレタン、ポリビニルピロリドン−ポリウレタン、ポリエステル−ポリウレタン、ポリエーテル−ポリウレタン等のウレタン系(共)重合体;スチレン−ブタジエンゴム、イソプレンゴム等の合成ゴムや天然ゴムのゴム類;高重合度架橋メチルポリシロキサン、アクリル−シリコーン等のシリコーン系重合体及びその誘導体等が挙げられる。
【0013】
吸油性ポリマーが吸油出来る油としては化粧品に使用できる油であれば特に組成は限定されない。具体的にはスクアラン、スクアレンに代表される炭化水素系油;ミリスチン酸イソプロピルに代表されるエステル油;ポリジメチルシロキサン、オクタメチルシクロテトラシロキサン、デカメチルシクロペンタシロキサン等のシクロメチコン等に代表されるシリコーン油;フッ素変性エーテルに代表されるフッ素系オイル;アルコール類の親水性油剤等の油性成分が挙げられる。油性成分は、好ましくは、溶解パラメーターδ[(MPa)1/2](Polymer Handbook 1989 by John Wiley & Sons, Inc.記載)が、20未満であることが好ましい。
【0014】
[バインダー]
本発明の化粧料は、前述の吸性ポリマーをシワ等の皮溝中に固定するためにも、更にバインダーを含有することが好ましい。バインダーとしては、皮膜形成性を有するポリマー又は粘着性を有するポリマーが挙げられる。
【0015】
皮膜形成性を有するポリマーとしては、好ましくは36℃付近で成膜性を有するポリマーを用いることが出来、溶液型、水分散型に関わらない。皮膜形成性は、最低造膜温度測定装置により測定することが出来る。
【0016】
粘着性を有するポリマーとしては、Tgが0℃以下のポリマーの架橋体粒子や、溶剤や可塑剤を含んだポリマー架橋粒子が挙げられる。ここで架橋体とは、粒子100質量部に対して、0.001〜5質量部の架橋剤を使用して得られる架橋体を言う。ポリマーのTgは示差走査熱量計により測定することができる。
【0017】
例えば、部分架橋オルガノポリシロキサンや、オルガノポリシロキサンをポリ(N−アシルアルキレンイミン)又は糖で変性した特開2002−179530号公報記載の変性オルガノポリシロキサン等のポリシロキサンエラストマー;ポリビニルピロリドン系ポリマー;ビニルピロリドン・ジメチルアミノエチルメタクリレート共重合体、その部分四級化ポリマー等のカチオン系高分子;ポリスチレンスルホン酸ナトリウム、メチルビニルエーテル・マレイン酸共重合体等のアニオン系高分子;(メタ)アクリル系共重合体;ポリビニルアルコール及びその誘導体・共重合体;ポリ酢酸ビニル及び共重合体;ポリウレタン、アクリル−ポリウレタン、ポリビニルピロリドン−ポリウレタン、ポリエステル−ポリウレタン、ポリエーテル−ポリウレタン等のウレタン系高分子;スチレン−ブタジエンゴム、イソプレンゴム等の合成ゴムや天然ゴム;アクリル−シリコーン等のシリコーンゴム及びその誘導体等が挙げられる。あるいは、これらの架橋体を用いることができる。
【0018】
これらのバインダーは単独あるいは2種以上の組み合わせで使用することが出来る。これらのバインダーが、吸油性を有する場合は、前述の膨潤型吸油性ポリマーを兼ねることができる。
【0019】
[凹凸部隠し用化粧料]
本発明の凹凸部隠し用化粧料中、膨潤型吸油性ポリマーの未膨潤状態での含有量は、低すぎると、体積膨張によるシワ・毛穴隠しの効果が弱くなり、多すぎると塗布し難くなるので、好ましくは0.5〜80質量%、更に好ましくは6〜70質量%、特に好ましくは10〜60質量%である。
【0020】
本発明の凹凸部隠し用化粧料中、バインダーの含有量は、化粧の持続性及び化粧持ちを良好にし、よれの発生を防止する観点から、好ましくは1〜60質量%、更に好ましくは10〜50質量%である。
【0021】
膨潤型吸油性ポリマー(未膨潤状態)は、バインダー100質量部に対し、好ましくは10〜2000質量部であり、更に好ましくは50〜1000質量部である。
【0022】
本発明の凹凸部隠し用化粧料中、吸油性ポリマーは、多少膨潤していてもよいが、後述する膨潤型吸油性ポリマーの皮膚上への定着を早く行うために、更に化粧料中均一系で保持するために、膨潤型吸油性ポリマーの含油量が、飽和吸油量未満の状態で存在する必要があり、実質的に未膨潤状態(好ましくは飽和吸油量の1/10以下の含油量)であることが好ましい。膨潤型吸油性ポリマーの化粧料中の平均粒径は、好ましくは0.01μm以上、更に好ましくは0.1μm以上であり、特に好ましくは1μm以上である。上限は、100μm以下が好ましく、更に好ましくは50μm以下、特に好ましくは30μm以下である。化粧料中の平均粒径は、キーエンス社製デジタルマイクロスコープVH−8000によって測定することができる。
【0023】
本発明の凹凸部隠し用化粧料は、油中水型又は水中油型の乳化化粧料、油性化粧料、スプレー化粧料、スティック状化粧料、ゲル状化粧料、水性化粧料等のいずれでもよい。
【0024】
本発明の凹凸部隠し用化粧料は、前述の吸油性ポリマー、バインダーの他に、油剤、粉体、保湿剤、着色剤、界面活性剤、pH緩衝剤、増粘剤、抗菌剤、防腐剤、美白剤、収斂剤、皮膚軟化剤等を配合することが出来る。油剤としてはジメチルポリシロキサンに代表されるシリコーン系オイル、イソパラフィン、スクアラン等に代表される炭化水素系オイル、ミリスチン酸イソプロピル等に代表されるエステル系オイル、フォンブリン等に代表されるフッ素系オイル等化粧品に使用できるようなオイルが挙げられる。保湿剤としては、グリセリン、1,3−ブチレングリコール、ソルビトール等が挙げられる。粉体としては、無機物、有機物に限定されず化粧品に使用できる粉体であれば配合することが出来る。着色剤としては、法定色素に代表される有機系の染料、顔料やベンガラ等に代表される無機系の顔料等が挙げられる。また、界面活性剤に関しては、アニオン系、ノニオン系、カチオン系に関わらず、化粧品に使用できるような界面活性剤を使用することが出来る。
【0025】
更に本発明の凹凸部隠し用化粧料は、エタノール、イソプロピルアルコール等の炭素数1〜3の低級アルコール;水等の溶媒を含有することが、剤の乾燥性を早めると共に、さっぱりした感触を与え、更に膨潤型吸油性ポリマーの膨潤を調節することもでき、好ましい。このような溶媒の含有量は、本発明の化粧料中、好ましくは5〜60質量%、更に好ましくは10〜50質量%である。本発明の化粧料が油性成分を含有している場合、油性成分100質量部に対して、溶媒は、好ましくは100質量部以上、より好ましくは200質量部以上である。
【0026】
[皮膚の凹凸部隠し方法]
本発明の凹凸部隠し用化粧料は、ファンデーション(おしろいを含む)の塗布前又は塗布後に、シワ・毛穴、傷等の皮膚の凹部分に塗布する。皮膚の凸部に用いる場合、凸部の先端と平面部との間に出来る隙間部分に塗布することが出来る。好ましくは、ファンデーションを塗布する前に、本発明の凹凸部隠し用化粧料を塗布する。しばらく塗布部を乾燥させ、膨潤型吸油性ポリマー及びバインダーを皮膚上に定着させた後に、膨潤型吸油性ポリマーを膨潤させることが出来る油性成分を含む化粧料を、前記塗布部位に接触させ、吸油性ポリマーを膨潤させることで、皮膚の凹凸部を隠す方法が好ましい。その後、ファンデーション等を塗布してもよい。バインダーを定着させることで、吸油性ポリマーをより固定化することができる。吸油性ポリマーを定着させた後、膨潤させることにより、シワ・毛穴等の表面をより平らに、滑らかにすることができる。
【0027】
前記吸油性ポリマーを膨潤させることが出来る油性成分を含む化粧料(以下、膨潤剤用化粧料という)とは、好ましくは膨潤させることができる油性成分を含む化粧料であるが、更に好ましくは10質量%以上、特に好ましくは15質量%以上の油性成分を含有する。この化粧料は、油中水型又は水中油型の乳化化粧料、あるいは油性化粧料等が挙げられる。ここで油性成分としては化粧品に使用できる油性成分であれば特に限定されない。具体的には、前記の膨潤型吸油性ポリマーの欄に記載した油性成分が挙げられる。
【0028】
更に、膨潤剤用化粧料は、膨潤後の吸油性ポリマーを固定するために、前述のバインダーを、1〜50質量%含有することが好ましい。水、粉体、着色剤、安定剤、防腐剤、界面活性剤等も含有していてもよい。
【0029】
また、本発明の凹凸部隠し用化粧料の塗布後に、膨潤剤用化粧料を用いずに、その後、ファンデーション等を塗布し、完成させることも出来る。
【0030】
塗布の方法は、例えば、指、あるいは筆、スポンジ等の道具を用いた塗布、スプレー等を用いた噴霧による塗布方法等が挙げられる。
【0031】
【実施例】
例中の%は、特記しない限り質量%である。
【0032】
合成例1(吸油性ポリマー粒子1の合成)
ビーカーに、水100g、ポリビニルアルコール(GH−17、日本合成(株)製)1gを入れ混合した。別のビーカーにメタクリル酸ステアリルを20g、エチレングリコールジメタクリレートを0.2g、過酸化ラウロイルを0.4g入れ攪拌した。過酸化ラウロイルを溶解した後、前述のポリビニルアルコール水溶液と混合し、ホモミキサーにより乳化を行った。乳化物を反応容器に入れ、窒素ガスにより溶存酸素を除去した後、乳化液を70℃に昇温し、6時間重合を行った。冷却後、デカンテーション、水洗を数回行った後、吸油性ポリマー粒子(以下吸油性ポリマー粒子1という)の水分散液を得た。この吸油性ポリマー1の固形分は50%、平均粒径は25μmであった(堀場製作所LA−910で測定)。また、一部を乾燥させ、スクアランを用いて吸油量を測定した結果、吸油量は4g/gであった。スクアランを用いた飽和膨潤状態の平均粒径は、37.5μmであった。
【0033】
合成例2(吸油性ポリマー粒子2の合成)
合成例1で得られた、吸油性ポリマー1/水分散液を濾過し、真空乾燥機(減圧、100℃、12時間)により乾燥した後、コーヒーミル、ジェットミルを用いて解砕、粉体化して、吸油性ポリマー粒子(以下吸油性ポリマー粒子2という)を得た。
【0034】
合成例3(バインダー1の合成)
反応容器に水150g、過硫酸アンモニウム0.5gを仕込み、窒素ガスを流して溶存酸素を除去した。滴下ロートにメタクリル酸メチル17g、アクリル酸n−ブチル80g、アクリル酸3gを仕込んだ。攪拌下に反応容器を75℃まで昇温し、滴下ロートより上記モノマーを3時間かけて滴下後、3時間熟成を行った。冷却後、NaOH水溶液によりアクリル酸の35%を中和し、濃縮した後、若干の凝集物を除去し、固形分50%のポリマーエマルジョン(以下バインダー1という)を得た。このエマルジョンの最低成膜温度を測定した結果、4℃以下であった。
【0035】
合成例4(バインダー2の合成)
ビーカーに水100g、アルキル硫酸エステル塩(エマール0、花王(株)製)2gを入れ混合した。別のビーカーにアクリル酸イソステアリル(大阪有機化学製)20g、エチレングリコールジメタクリレート0.2g、過酸化ラウロイル0.4gを入れ攪拌した。過酸化ラウロイルを溶解した後、前述のアルキル硫酸エステル塩水溶液と混合し、ホモミキサーにより乳化を行った。乳化物を反応容器に入れ、窒素ガスにより溶存酸素を除去した後、乳化液を70℃に昇温し、6時間重合を行った。冷却後、濾過によりポリマーを取り出し、水洗、アセトン洗浄を数回行った後、乾燥させ、粘着性のバインダー(以下バインダー2という)を得た。重合後、水分散液の状態での平均粒径は7μmであった(堀場製作所LA−910で測定)。
【0036】
処方例1
ビーカーに、バインダー1(固形分50%)を40g、合成例1で得られた吸油性ポリマー粒子1の水分散液(固形分50%)を120g加え、攪拌し、凹凸部隠し用化粧料を調製した。
【0037】
処方例2
ビーカーに、バインダー2を40g、デカメチルシクロペンタシロキサン(SH245、東レダウコーニング・シリコーン社製)を160g加え、6時間攪拌した後、合成例2で得られた吸油性ポリマー粒子2を40g加え、更に攪拌し、凹凸部隠し用化粧料を調製した。この化粧料をスライドグラスに塗布し、その上にスクワランを添加した所、キーエンス社製デジタルマイクロスコープVH−8000により、吸油性ポリマー粒子が膨潤するのが観察された。
【0038】
比較処方例1
ビーカーに、バインダー2を40g、デカメチルシクロペンタシロキサン(SH245)を160g加え、6時間攪拌した。別のビーカーに合成例2で得られた吸油性ポリマー粒子2を40g、スクワランを160g加え、6時間攪拌し、吸油性ポリマー粒子2を完全に膨潤させた後、前述のバインダー2のSH245溶液と混合し、更に攪拌し、比較の凹凸部隠し用化粧料を調製した。
【0039】
比較処方例2
ビーカーに、バインダー1(固形分50%)を40g、ポリエーテル変性シリコーン(SH3771、東レダウコーニング・シリコーン社製)を0.5g入れ、ホモディスパーにより攪拌しながら、ジメチルシロキサン塊状重合体(トスパール145A、GE東芝シリコーン社製)60gを加え、更に攪拌し、比較の凹凸部隠し用化粧料を調製した。
【0040】
処方例1〜2及び比較処方例1〜2で得られた凹凸部隠し用化粧料の組成をまとめて表1に示す。
【0041】
【表1】

Figure 0003756484
【0042】
処方例3
混合容器に、攪拌下、精製水59g、ポリオキシエチレンソルビタン脂肪酸エステル(レオドールTW−S120、花王(株)製)1g、スクアラン20g、ジメチルシロキサン塊状重合体(トスパール145A)を20g順次ゆっくり滴下し、O/W乳化型の膨潤剤用化粧料を得た。
【0043】
実施例1〜2及び比較例1〜2
表2に示す凹凸部隠し用化粧料及び膨潤剤用化粧料を用い、下記の化粧法A及び化粧法Bにより化粧を行い、下記方法で、仕上がり、シワの隠蔽性、使用感を評価した。結果を表2に示す。
【0044】
<化粧法A>
洗顔後、凹凸部隠し用化粧料を目尻の大シワに適量(約米粒大)塗布し、乾燥後(約5分後)、その上から膨潤剤用化粧料を、筆を用いて適量塗布した。その後、おしろい(花王ソフィーナ・ファインフィット・フェースパウダー)を塗布し、化粧を完成させた。
【0045】
<化粧法B>
洗顔後、凹凸部隠し用化粧料を目尻の大シワに適量(約米粒大)塗布し、その後、前記おしろいを適量塗布し、化粧を完成させた。
【0046】
<評価方法>
・仕上がり
2名の専門パネラーにより、化粧後の仕上がり、すなわち、毛穴による肌の凹凸を以下の5段階で評価した。その平均点を求め、平均点が4以上を「◎」、3以上4未満を「○」、2以上3未満を「△」、2未満を「×」とした。
5:ほとんど目立たない
4:あまり目立たない
3:どちらともいえない
2:目立つ
1:非常に目立つ。
【0047】
・シワの隠蔽性
化粧を行った後、目尻のシワの隠蔽性を、2名の専門パネラーにより以下の5段階で評価した。その平均点を求め、平均点が4以上を「◎」、3以上4未満を「○」、2以上3未満を「△」、2未満を「×」とした。
5:ほとんど目立たない
4:あまり目立たない
3:どちらともいえない
2:目立つ
1:非常に目立つ。
【0048】
・使用感
2名の専門パネラーにより、化粧を行ったときの感触(皮膜感の有無)を以下の5段階で評価した。その平均点を求め、平均点が4以上を「◎」、3以上4未満を「○」、2以上3未満を「△」、2未満を「×」とした。
5:非常に良い
4:良い
3:どちらともいえない
2:やや悪い
1:悪い。
【0049】
【表2】
Figure 0003756484
【0050】
【発明の効果】
含油量が飽和吸油量未満の状態の膨潤型吸油性ポリマーを含有する本発明の凹凸部隠し用化粧料は、小じわばかりか、250μm以上の大きなしわや毛穴、傷痕等も隠蔽することができる。更に、膨潤剤用化粧料を用いることにより、表面をより自然に平らに、滑らかに仕上げることができる。[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a cosmetic useful as a skin concavity and convexity concealment, and more particularly to a corrugation concealment concealment and a concavity and convexity concealing method for easily concealing wrinkles and pores.
[0002]
[Prior art]
Conventionally, there are many worries about wrinkles of women, and various cosmetics for concealing wrinkles have been developed. For example, Patent Document 1 discloses an emulsified cosmetic for concealing wrinkles, characterized by containing a highly polymerized methylpolysiloxane, a volatile oil, and a translucent powder. Concealment is an issue. Patent Document 2 discloses a cosmetic containing a powder, a film-forming agent, a volatile solvent, and having a certain dry skin surface roughness. The finish can make the unevenness of the skin difficult to see. However, although these small wrinkles are hidden, it is difficult to hide even large wrinkles that are most worried by women, for example, having a skin groove of 250 μm or more.
[0003]
[Patent Document 1]
JP 2000-7551 A [Patent Document 2]
Japanese Patent Laid-Open No. 2002-179530
[Problems to be solved by the invention]
An object of the present invention is to provide a cosmetic for concealing an uneven part and a method for concealing an uneven part, which neatly hides large wrinkles and pores and does not have a strange appearance or feel.
[0005]
[Means for Solving the Problems]
The present invention relates to a cosmetic for concealing uneven portions, comprising swelling oil-absorbing polymer particles having an oil content of less than a saturated oil absorption amount, and a binder comprising a film-forming polymer or an adhesive polymer , and after coating the uneven portion hidden cosmetic on the skin, a cosmetic containing an oil component for the swelling type oil-absorbing polymer particles can be swollen, is brought into contact with the application site, providing uneven portions hidden process of the skin .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
[Swelling oil-absorbing polymer]
The swelling type oil-absorbing polymer used in the present invention is not particularly limited as long as it is a polymer that absorbs oil and swells. In order to absorb oil, it preferably has a crosslinked structure.
[0007]
The swelling type oil-absorbing polymer used in the present invention is not limited to a shape, and preferred examples include particles such as a true sphere, an egg shape, and a lump shape. In addition, a flake shape, a plate shape, a fiber shape, and a fine particle aggregate Either a shape (granulated) or an indefinite shape can be used. These particles may be porous.
[0008]
The average particle diameter of the non-swelled state of the particulate swelling type oil-absorbing polymer is preferably 0.01 μm or more, more preferably 0.1 μm or more, and particularly preferably 1 μm or more. The upper limit is preferably 100 μm or less, and more preferably 50 μm or less. Within this range, the granularity of the polymer particles is not felt and the appearance is not unnatural. Here, the average particle size in an unswelled state is a light scattering type particle size measuring device (for example, LS-230 type manufactured by Coulter, Inc. (dispersion medium: non-swelling solvent), LA-910 (dispersion medium: water) manufactured by Horiba, Ltd.) ), The average particle diameter in an unswelled state obtained by measurement.
[0009]
The average particle size of the saturated swelling state of the particulate swelling type oil-absorbing polymer is preferably 0.01 μm or more, more preferably 0.1 μm or more, and particularly preferably 1 μm or more. The upper limit is preferably 100 μm or less, more preferably 30 μm or less. Within this range, the polymer particles enter the crevice such as wrinkles and are excellent in the effect of hiding the wrinkles, and do not look unnatural in appearance. The average particle size in the saturated swelling state is determined by taking oil-absorbing polymer particles in a slide glass and adding excessive squalane (in the case of a silicone polymer in which 50% by mass or more of the repeating units constituting the polymer contain silicon atoms, decamethylcyclohexane). Pentasiloxane) is dripped to saturate and swell the oil-absorbing polymer particles, and an enlarged image is taken using a digital microscope VH-8000 manufactured by Keyence, and the particle size of 50 particles can be measured and determined.
[0010]
The oil absorption amount of the swelling oil-absorbing polymer is preferably one that can hold 1 g or more of swellable oil per 1 g of swelling oil-absorbing polymer (oil absorption amount: 1 g / g or more) by the measurement method shown below. g or more is more preferable, and 5 g / g or more is particularly preferable. The upper limit is preferably 200 g / g or less, and more preferably 100 g / g or less. Within this range, the effect of hiding wrinkles is excellent, and the appearance does not look unnatural.
[0011]
<Measurement method of oil absorption>
The oil absorption amount of the swelling type oil-absorbing polymer was measured by adding 1 g of the swelling type oil-absorbing polymer to a centrifuge tube, weighing the added amount, adding a large excess of swellable oil accurately weighed, and shaking for 12 hours. Thereafter, the polymer phase and the liquid phase were separated by a centrifuge, only the liquid phase was taken out and weighed, the amount of oil absorbed in the polymer was calculated, and the amount of oil absorbed per gram of polymer was obtained. In the measurement of the oil absorption amount, squalane is basically used as oil, but decamethylcyclopentasiloxane is used as oil in the case of a silicone polymer in which 50% by mass or more of the repeating units constituting the polymer contain silicon atoms.
[0012]
Specific examples of the oil-absorbing polymer include cross-linked poly (meth) acrylic acid esters (however, (meth) acrylic acid means acrylic acid, methacrylic acid or a mixture thereof). Polymers; Urethane (co) polymers such as polyurethane, acrylic-polyurethane, polyvinylpyrrolidone-polyurethane, polyester-polyurethane, polyether-polyurethane; synthetic rubbers such as styrene-butadiene rubber and isoprene rubber, and natural rubbers; Examples thereof include silicone polymers such as high polymerization degree cross-linked methylpolysiloxane and acryl-silicone, and derivatives thereof.
[0013]
The oil that can be absorbed by the oil-absorbing polymer is not particularly limited as long as it is an oil that can be used in cosmetics. Specifically, hydrocarbon oils typified by squalane and squalene; ester oils typified by isopropyl myristate; typified by cyclomethicones such as polydimethylsiloxane, octamethylcyclotetrasiloxane and decamethylcyclopentasiloxane Examples include silicone oils; fluorine-based oils typified by fluorine-modified ethers; and oily components such as alcoholic hydrophilic oils. The oil component preferably has a solubility parameter δ [(MPa) 1/2 ] (Polymer Handbook 1989 by John Wiley & Sons, Inc.) of less than 20.
[0014]
[binder]
The cosmetic of the present invention, in order to fix in Kawamizo such as wrinkles and absorption oil polymer described above also preferably further contains a binder. Examples of the binder include a polymer having a film forming property or a polymer having an adhesive property.
[0015]
As the polymer having film-forming properties, a polymer having film-forming properties at around 36 ° C. can be preferably used, regardless of whether it is a solution type or a water dispersion type. The film formability can be measured with a minimum film-forming temperature measuring device.
[0016]
Examples of the adhesive polymer include crosslinked polymer particles having a Tg of 0 ° C. or lower, and polymer crosslinked particles containing a solvent and a plasticizer. Here, the crosslinked product refers to a crosslinked product obtained by using 0.001 to 5 parts by mass of a crosslinking agent with respect to 100 parts by mass of particles. The Tg of the polymer can be measured with a differential scanning calorimeter.
[0017]
For example, polysiloxane elastomers such as partially crosslinked organopolysiloxanes and modified organopolysiloxanes described in JP-A No. 2002-179530 in which organopolysiloxanes are modified with poly (N-acylalkylenimine) or sugar; polyvinylpyrrolidone polymers; Cationic polymers such as vinylpyrrolidone / dimethylaminoethyl methacrylate copolymer and partially quaternized polymers thereof; Anionic polymers such as sodium polystyrene sulfonate and methyl vinyl ether / maleic acid copolymer; (meth) acrylic copolymers Polymers; polyvinyl alcohol and its derivatives / copolymers; polyvinyl acetate and copolymers; polyurethane, acrylic-polyurethane, polyvinylpyrrolidone-polyurethane, polyester-polyurethane, polyether-poly Urethane polymers such as urethane, styrene - butadiene rubbers, synthetic rubbers and natural rubbers such as isoprene rubber, acrylic - silicone rubber and its derivatives such as silicone. Alternatively, these crosslinked products can be used.
[0018]
These binders can be used alone or in combination of two or more. When these binders have oil absorbency, they can also serve as the aforementioned swelling oil-absorbing polymer.
[0019]
[Cosmetic for concealing uneven parts]
If the content of the swelling oil-absorbing polymer in the unswollen state in the cosmetics for concealing uneven portions of the present invention is too low, the effect of concealing wrinkles and pores due to volume expansion will be weak, and if it is too large, it will be difficult to apply. Therefore, Preferably it is 0.5-80 mass%, More preferably, it is 6-70 mass%, Most preferably, it is 10-60 mass%.
[0020]
In the cosmetics for concealing uneven portions according to the present invention, the content of the binder is preferably 1 to 60% by mass, more preferably 10 to 10% from the viewpoint of improving makeup durability and longevity and preventing the occurrence of twisting. 50% by mass.
[0021]
The swelling oil-absorbing polymer (non-swelled state) is preferably 10 to 2000 parts by mass, more preferably 50 to 1000 parts by mass with respect to 100 parts by mass of the binder.
[0022]
In the cosmetics for concealing uneven portions of the present invention, the oil-absorbing polymer may be somewhat swollen, but in order to quickly fix the swelling oil-absorbing polymer described later on the skin, it is further uniform in the cosmetic. In order to maintain the oil content of the swelling oil-absorbing polymer, it is necessary that the oil content of the swelling type oil-absorbing polymer is less than the saturated oil absorption amount, and is substantially unswelled (preferably an oil content of 1/10 or less of the saturated oil absorption amount). It is preferable that The average particle diameter of the swelling oil-absorbing polymer in the cosmetic is preferably 0.01 μm or more, more preferably 0.1 μm or more, and particularly preferably 1 μm or more. The upper limit is preferably 100 μm or less, more preferably 50 μm or less, and particularly preferably 30 μm or less. The average particle size in the cosmetic can be measured with a digital microscope VH-8000 manufactured by Keyence Corporation.
[0023]
The cosmetics for concealing uneven portions of the present invention may be any of water-in-oil or oil-in-water emulsified cosmetics, oily cosmetics, spray cosmetics, stick cosmetics, gel cosmetics, aqueous cosmetics, and the like. .
[0024]
In addition to the oil-absorbing polymer and binder described above, the cosmetic for concealing uneven portions according to the present invention includes oil, powder, moisturizer, colorant, surfactant, pH buffer, thickener, antibacterial agent, and preservative. , Whitening agents, astringents, emollients and the like can be blended. Oils include silicone oils typified by dimethylpolysiloxane, hydrocarbon oils typified by isoparaffin, squalane, ester oils typified by isopropyl myristate, fluorine oils typified by fomblin, etc. Oils that can be used in cosmetics are listed. Examples of the humectant include glycerin, 1,3-butylene glycol, sorbitol and the like. The powder is not limited to inorganic and organic substances, and any powder that can be used in cosmetics can be blended. Examples of the colorant include organic dyes typified by legal dyes, inorganic pigments typified by pigments and red roses, and the like. As for the surfactant, a surfactant that can be used in cosmetics can be used regardless of anionic, nonionic or cationic.
[0025]
Furthermore, the cosmetic for concealing uneven portions of the present invention contains a lower alcohol having 1 to 3 carbon atoms such as ethanol and isopropyl alcohol; a solvent such as water, which speeds up the drying of the agent and gives a refreshing feel. Furthermore, the swelling of the swelling type oil-absorbing polymer can be controlled, which is preferable. The content of such a solvent is preferably 5 to 60% by mass, more preferably 10 to 50% by mass in the cosmetic of the present invention. When the cosmetic of the present invention contains an oil component, the solvent is preferably 100 parts by mass or more, more preferably 200 parts by mass or more, with respect to 100 parts by mass of the oil component.
[0026]
[How to hide skin irregularities]
The cosmetic for concealing uneven portions of the present invention is applied to the concave portions of the skin such as wrinkles, pores, and wounds before or after the application of the foundation (including the face). When using for the convex part of skin, it can apply | coat to the clearance gap part formed between the front-end | tip of a convex part and a plane part. Preferably, before applying the foundation, the cosmetic for concealing uneven portions of the present invention is applied. After the application part is dried for a while and the swelling type oil-absorbing polymer and the binder are fixed on the skin, a cosmetic containing an oily component that can swell the swelling type oil-absorbing polymer is brought into contact with the application site to absorb the oil. The method of concealing the uneven part of the skin by swelling the functional polymer is preferable. Thereafter, a foundation or the like may be applied. By fixing the binder, the oil-absorbing polymer can be more fixed. After fixing the oil-absorbing polymer, the surface such as wrinkles and pores can be made smoother and smoother by swelling.
[0027]
The cosmetic containing an oily component capable of swelling the oil-absorbing polymer (hereinafter referred to as “swelling agent cosmetic”) is preferably a cosmetic containing an oily component capable of swelling, more preferably 10 The oily component is contained in an amount of not less than mass%, particularly preferably not less than 15 mass%. Examples of the cosmetic include water-in-oil or oil-in-water emulsified cosmetics, oily cosmetics, and the like. The oil component is not particularly limited as long as it is an oil component that can be used in cosmetics. Specifically, the oil component described in the column of the swelling oil-absorbing polymer is mentioned.
[0028]
Further, the cosmetic for a swelling agent preferably contains 1 to 50% by mass of the above-mentioned binder in order to fix the oil-absorbing polymer after swelling. Water, powder, colorant, stabilizer, preservative, surfactant and the like may also be contained.
[0029]
Moreover, after application | coating of the cosmetics for concavity and convexity concealment of the present invention, a foundation or the like can be applied and completed without using the cosmetic for swelling agent.
[0030]
Examples of the application method include application using a finger or a tool such as a brush or a sponge, and an application method by spraying using a spray or the like.
[0031]
【Example】
Unless otherwise specified,% in the examples is% by mass.
[0032]
Synthesis Example 1 (Synthesis of oil-absorbing polymer particles 1)
In a beaker, 100 g of water and 1 g of polyvinyl alcohol (GH-17, manufactured by Nippon Gosei Co., Ltd.) were added and mixed. In another beaker, 20 g of stearyl methacrylate, 0.2 g of ethylene glycol dimethacrylate, and 0.4 g of lauroyl peroxide were added and stirred. After dissolving lauroyl peroxide, it was mixed with the aqueous polyvinyl alcohol solution described above and emulsified with a homomixer. The emulsion was put into a reaction vessel and dissolved oxygen was removed with nitrogen gas, and then the emulsion was heated to 70 ° C. and polymerized for 6 hours. After cooling, decantation and water washing were performed several times, and an aqueous dispersion of oil-absorbing polymer particles (hereinafter referred to as oil-absorbing polymer particles 1) was obtained. The oil-absorbing polymer 1 had a solid content of 50% and an average particle size of 25 μm (measured by Horiba LA-910). Moreover, as a result of partially drying and measuring the oil absorption using squalane, the oil absorption was 4 g / g. The average particle size in a saturated swelling state using squalane was 37.5 μm.
[0033]
Synthesis Example 2 (Synthesis of oil-absorbing polymer particles 2)
The oil-absorbing polymer 1 / water dispersion obtained in Synthesis Example 1 is filtered, dried by a vacuum dryer (reduced pressure, 100 ° C., 12 hours), crushed using a coffee mill or jet mill, and powder To obtain oil-absorbing polymer particles (hereinafter referred to as oil-absorbing polymer particles 2).
[0034]
Synthesis example 3 (synthesis of binder 1)
The reaction vessel was charged with 150 g of water and 0.5 g of ammonium persulfate, and the dissolved oxygen was removed by flowing nitrogen gas. A dropping funnel was charged with 17 g of methyl methacrylate, 80 g of n-butyl acrylate, and 3 g of acrylic acid. The temperature of the reaction vessel was raised to 75 ° C. with stirring, and the monomer was added dropwise from a dropping funnel over 3 hours, followed by aging for 3 hours. After cooling, 35% of acrylic acid was neutralized with an aqueous NaOH solution and concentrated, and then some agglomerates were removed to obtain a polymer emulsion having a solid content of 50% (hereinafter referred to as binder 1). As a result of measuring the minimum film forming temperature of this emulsion, it was 4 ° C. or lower.
[0035]
Synthesis Example 4 (Synthesis of Binder 2)
In a beaker, 100 g of water and 2 g of alkyl sulfate ester salt (Emar 0, manufactured by Kao Corporation) were added and mixed. In another beaker, 20 g of isostearyl acrylate (produced by Osaka Organic Chemical Co., Ltd.), 0.2 g of ethylene glycol dimethacrylate, and 0.4 g of lauroyl peroxide were added and stirred. After dissolving lauroyl peroxide, it was mixed with the aqueous alkyl sulfate salt solution described above and emulsified with a homomixer. The emulsion was put into a reaction vessel and dissolved oxygen was removed with nitrogen gas, and then the emulsion was heated to 70 ° C. and polymerized for 6 hours. After cooling, the polymer was taken out by filtration, washed with water and washed with acetone several times, and then dried to obtain an adhesive binder (hereinafter referred to as Binder 2). After the polymerization, the average particle size in the state of the aqueous dispersion was 7 μm (measured with Horiba LA-910).
[0036]
Formulation Example 1
In a beaker, 40 g of binder 1 (solid content 50%) and 120 g of an aqueous dispersion (solid content 50%) of oil-absorbing polymer particles 1 obtained in Synthesis Example 1 were added and stirred to provide a cosmetic for concealing uneven portions. Prepared.
[0037]
Formulation Example 2
In a beaker, 40 g of binder 2 and 160 g of decamethylcyclopentasiloxane (SH245, manufactured by Toray Dow Corning Silicone) were added and stirred for 6 hours, and then 40 g of the oil-absorbing polymer particles 2 obtained in Synthesis Example 2 were added. Furthermore, it stirred and prepared the cosmetics for concavity and convexity concealment. When this cosmetic was applied to a slide glass and squalane was added thereto, swelling of the oil-absorbing polymer particles was observed with a digital microscope VH-8000 manufactured by Keyence Corporation.
[0038]
Comparative formulation example 1
In a beaker, 40 g of binder 2 and 160 g of decamethylcyclopentasiloxane (SH245) were added and stirred for 6 hours. In another beaker, 40 g of the oil-absorbing polymer particles 2 obtained in Synthesis Example 2 and 160 g of squalane were added and stirred for 6 hours to completely swell the oil-absorbing polymer particles 2, and then the SH245 solution of the binder 2 described above and The mixture was further stirred, and a comparative unevenness concealing cosmetic was prepared.
[0039]
Comparative formulation example 2
In a beaker, 40 g of binder 1 (solid content: 50%) and 0.5 g of polyether-modified silicone (SH3771, manufactured by Toray Dow Corning Silicone) were added and stirred with a homodisper while a dimethylsiloxane bulk polymer (Tospearl 145A) was used. GE Toshiba Silicone Co., Ltd.) 60 g was added, and the mixture was further stirred to prepare a comparative unevenness concealing cosmetic.
[0040]
Table 1 summarizes the compositions of the cosmetics for concealing uneven portions obtained in Formulation Examples 1 and 2 and Comparative Formulation Examples 1 and 2.
[0041]
[Table 1]
Figure 0003756484
[0042]
Formulation Example 3
While stirring, 59 g of purified water, 1 g of polyoxyethylene sorbitan fatty acid ester (Leodol TW-S120, manufactured by Kao Corp.), 20 g of squalane, 20 g of dimethylsiloxane bulk polymer (Tospearl 145A) are slowly and slowly dropped into a mixing container. An O / W emulsion type cosmetic for swelling agent was obtained.
[0043]
Examples 1-2 and Comparative Examples 1-2
Using the cosmetics for concavity and convexity concealment and the cosmetics for swelling agents shown in Table 2, makeup was carried out by the following cosmetic method A and cosmetic method B, and the finish, wrinkle concealing properties, and feeling of use were evaluated by the following methods. The results are shown in Table 2.
[0044]
<Cosmetics A>
After washing the face, apply a suitable amount of cosmetics for concealing uneven parts to large wrinkles at the corner of the eyes (approx. US grain size), dry (after about 5 minutes), and then apply an appropriate amount of cosmetic for swelling agent using a brush. . After that, we applied an interesting (Kao Sofina FineFit Face Powder) to complete the makeup.
[0045]
<Cosmetics B>
After the face washes, an appropriate amount (about a rice grain size) of the cosmetics for concealing the irregularities was applied to the large wrinkles at the outer corners of the eyes, and then an appropriate amount of the above-mentioned face was applied to complete the makeup.
[0046]
<Evaluation method>
-The finish after makeup, that is, the unevenness of the skin due to pores, was evaluated by the following five levels by two professional panelists. The average score was determined, and the average score of 4 or more was “◎”, 3 or more but less than 4 was “◯”, 2 or more but less than 3 was “Δ”, and less than 2 was “x”.
5: Almost inconspicuous 4: Inconspicuous 3: Neither can be said 2: Conspicuous 1: Very conspicuous.
[0047]
-After applying the wrinkle concealing makeup, the concealing property of the wrinkles of the corners of the eyes was evaluated by the following 5 levels by two expert panelists. The average score was determined, and the average score of 4 or more was “◎”, 3 or more but less than 4 was “◯”, 2 or more but less than 3 was “Δ”, and less than 2 was “x”.
5: Almost inconspicuous 4: Inconspicuous 3: Neither can be said 2: Conspicuous 1: Very conspicuous.
[0048]
-Feeling of use The feeling (the presence or absence of a film feeling) when applying makeup was evaluated by the following five levels by two expert panelists. The average score was determined, and the average score of 4 or more was “◎”, 3 or more but less than 4 was “◯”, 2 or more but less than 3 was “Δ”, and less than 2 was “x”.
5: Very good 4: Good 3: Not good 2: Somewhat bad 1: Bad
[0049]
[Table 2]
Figure 0003756484
[0050]
【The invention's effect】
The unevenness concealing cosmetic of the present invention containing a swelling type oil-absorbing polymer in a state where the oil content is less than the saturated oil absorption amount can conceal not only fine lines but also large wrinkles, pores, scars and the like of 250 μm or more. Furthermore, by using the cosmetic for swelling agent, the surface can be finished more naturally flat and smooth.

Claims (6)

含油量が飽和吸油量未満の状態の膨潤型吸油性ポリマー粒子と、皮膜形成性を有するポリマー又は粘着性を有するポリマーからなるバインダーとを含有する凹凸部隠し用化粧料を皮膚上に塗布後、膨潤型吸油性ポリマーを膨潤させることが出来る油性成分を含む化粧料を、前記塗布部位に接触させる、皮膚の凹凸部隠し方法。 After applying on the skin a cosmetic for concealing concavo-convex parts, comprising a swelling type oil-absorbing polymer particle in a state where the oil content is less than the saturated oil absorption amount, and a binder comprising a film-forming polymer or an adhesive polymer , A method for concealing an uneven part of a skin, wherein a cosmetic containing an oily component capable of swelling a swelling oil-absorbing polymer is brought into contact with the application site. 膨潤型吸油性ポリマー粒子の飽和膨潤状態の平均粒径が、0.01〜100μmである請求項1記載の凹凸部隠し方法The method for hiding concavities and convexities according to claim 1, wherein the average particle size in a saturated swelling state of the swelling oil-absorbing polymer particles is 0.01 to 100 µm. 凹凸部隠し用化粧料中の膨潤型吸油性ポリマー粒子の含有量が、0.5〜80質量%である請求項1又は2記載の凹凸部隠し方法 The method for concealing irregularities according to claim 1 or 2, wherein the content of the swelling oil-absorbing polymer particles in the cosmetic for concealing irregularities is 0.5 to 80% by mass. 膨潤型吸油性ポリマー粒子の含有量が、バインダー100質量部に対して10〜2000質量部である、請求項1〜3いずれかの項記載の凹凸部隠し方法The uneven | corrugated | grooved part concealment method of any one of Claims 1-3 whose content of swelling type oil-absorbing polymer particle is 10-2000 mass parts with respect to 100 mass parts of binders. 膨潤型吸油性ポリマー粒子が、架橋ポリ(メタ)アクリル酸エステルである、請求項1〜4いずれかの項記載の凹凸部隠し方法The uneven | corrugated | grooved part concealment method in any one of Claims 1-4 whose swelling type oil-absorbing polymer particle is bridge | crosslinking poly (meth) acrylic ester. シワ及び/又は毛穴隠し方法である請求項1〜5いずれかの項記載の凹凸部隠し方法It is a wrinkle and / or pore concealment method , The uneven | corrugated | concave part concealment method in any one of Claims 1-5.
JP2002379371A 2002-12-27 2002-12-27 Cosmetics for concealing uneven parts Expired - Fee Related JP3756484B2 (en)

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