JPWO2019189719A1 - 油中水型乳化化粧料 - Google Patents
油中水型乳化化粧料 Download PDFInfo
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- JPWO2019189719A1 JPWO2019189719A1 JP2020511066A JP2020511066A JPWO2019189719A1 JP WO2019189719 A1 JPWO2019189719 A1 JP WO2019189719A1 JP 2020511066 A JP2020511066 A JP 2020511066A JP 2020511066 A JP2020511066 A JP 2020511066A JP WO2019189719 A1 JPWO2019189719 A1 JP WO2019189719A1
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Abstract
Description
(a)油相、(b)水相、および(c)平均粒径1〜100μmの粉体を含む油中水型乳化組成物であって、
前記(a)油相と水との油水界面と、前記(c)粉体層との接点における当該粉体表面の接線を含む面と前記油水界面とのなす角(三相接触角)が0°より大きく160°未満であり、
前記(b)水相が、ひずみ0.01〜1%における損失弾性率が80Pa以上というレオロジー特性を有する油中水型乳化組成物、並びに前記組成物からなる化粧料に関する。
本発明の組成物の外相(連続相)となる油相を構成する油分は、特に限定されず、炭化水素油、エステル油、シリコーン油から適宜選択できる。但し、(a)油相と水との油水界面と、後述する(c)粉体層との接点における当該粉体表面の接線を含む面と前記油水界面とのなす角(三相接触角)が0°より大きく160°未満であることを条件として選択される。油分として、シリコーン油、中でも、揮発性の環状シリコーン油および/または直鎖状シリコーン油を配合するのが使用感の点で好ましい。
本発明の組成物の内相(分散相)となる水相は、25℃、周波数1Hzの条件下で測定したときの、ひずみ0.01〜1%における損失弾性率が80Pa以上というレオロジー特性を有する。レオロジー特性は、特に限定されないが、コーンプレート冶具を備えたレオメーター(例えば、アントンパール(Antonpaar)社のレオメーターMCR−302)を用いて測定することができる。
本発明の組成物で用いられる(c)粉体は、平均粒径1〜100μmの粉体であり、前記(a)油相と水との油水界面と、前記(c)粉体層との接点における当該粉体表面の接線を含む面と前記油水界面とのなす角(三相接触角)が0°より大きく160°未満である。
即ち、表面処理剤として好ましく用いられる金属石鹸の例として、ミリスチン酸マグネシウム、ミリスチン酸亜鉛、ミリスチン酸アルミニウム、ステアリン酸マグネシウム、ステアリン酸亜鉛、ステアリン酸アルミニウム、ジステアリン酸アルミニウム、オレイン酸アルミニウム、パルミチン酸アルミニウム、ラウリン酸アルミニウム,ミリスチン酸アルミニウム、ジミリスチン酸アルミニウム、シリコーン金属石鹸(末端カルボキシル基を有するオルガノシロキサン誘導体の2価又は3価の金属塩)等が挙げられる。
A:安定な乳化粒子を形成し、合一及び離水を認めない。
B:乳化粒子を形成するが、わずかな合一又は離水が認められる。
C:乳化粒子を形成しない(調製直後に増粘剤水溶液が分離又は凝集する)。
A:優れている
B:普通
C:劣っている
Claims (7)
- (a)油相、(b)水相、および(c)平均粒径1〜100μmの粉体を含む油中水型乳化組成物であって、
前記(a)油相と水との油水界面と、前記(c)粉体層との接点における当該粉体表面の接線を含む面と前記油水界面とのなす角(三相接触角)が0°より大きく160°未満であり、
前記(b)水相が、ひずみ0.01〜1%における損失弾性率が80Pa以上というレオロジー特性を有する、油中水型乳化組成物。 - 平均乳化粒径が20μm〜200μmである、請求項1に記載の組成物。
- (b)水相が水性増粘剤を含有する、請求項1又は2に記載の組成物。
- 前記水性増粘剤が、セルロースナノファイバー、(ジメチルアクリルアミド/アクリロイルジメチルタウリンNa)クロスポリマー、ポリアクリル酸Naクロスポリマー、および寒天からなる群から選択される、請求項3に記載の組成物。
- 前記粉体が、合成金雲母、硫酸バリウム、セルロース、シリカ、炭酸カルシウム、(メタクリル酸メチル/メタクリル酸PEG/PPG−4/3)クロスポリマー、タルク、シリカ被覆(IPDI/ポリ(1,4−ブタンジオール)−14クロスポリマー、セルロース/酸化チタン複合粉末、および前記粉末を疎水化処理した粉末からなる群から選択される、請求項1から4のいずれか一項に記載の組成物。
- 前記疎水化処理が、金属石鹸処理である、請求項5に記載の組成物。
- 請求項1から6のいずれか一項に記載の組成物からなる化粧料。
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