JP6489377B2 - O/w型乳化皮膚外用組成物とその使用方法 - Google Patents
O/w型乳化皮膚外用組成物とその使用方法 Download PDFInfo
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- JP6489377B2 JP6489377B2 JP2016072676A JP2016072676A JP6489377B2 JP 6489377 B2 JP6489377 B2 JP 6489377B2 JP 2016072676 A JP2016072676 A JP 2016072676A JP 2016072676 A JP2016072676 A JP 2016072676A JP 6489377 B2 JP6489377 B2 JP 6489377B2
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- 239000002552 dosage form Substances 0.000 description 1
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- 239000000284 extract Substances 0.000 description 1
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- 125000004356 hydroxy functional group Chemical group O* 0.000 description 1
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- 229940100554 isononyl isononanoate Drugs 0.000 description 1
- 229940074928 isopropyl myristate Drugs 0.000 description 1
- XUGNVMKQXJXZCD-UHFFFAOYSA-N isopropyl palmitate Chemical compound CCCCCCCCCCCCCCCC(=O)OC(C)C XUGNVMKQXJXZCD-UHFFFAOYSA-N 0.000 description 1
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- 229940089456 isopropyl stearate Drugs 0.000 description 1
- 229960004488 linolenic acid Drugs 0.000 description 1
- KQQKGWQCNNTQJW-UHFFFAOYSA-N linolenic acid Natural products CC=CCCC=CCC=CCCCCCCCC(O)=O KQQKGWQCNNTQJW-UHFFFAOYSA-N 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- 239000012170 montan wax Substances 0.000 description 1
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- 239000002736 nonionic surfactant Substances 0.000 description 1
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- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 1
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- 239000002674 ointment Substances 0.000 description 1
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- 125000005702 oxyalkylene group Chemical group 0.000 description 1
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- 239000012188 paraffin wax Substances 0.000 description 1
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Description
O/W型乳化皮膚外用組成物は、25℃で液状又は半固形状の油性成分を含有する。この成分を含有する本実施形態のO/W型乳化皮膚外用組成物は、25℃で固形状の油性成分のみを含有するO/W型乳化皮膚外用組成物と比較して、組成物の粘度が低く、皮膚への展延性が向上する。これにより、本実施形態のO/W型乳化皮膚外用組成物を皮膚へ塗布した際、乳化破壊が起きやすくなり、皮膚への油性成分の残存量が増加する。
O/W型乳化皮膚外用組成物は、分子内に複数の長鎖疎水基と複数の親水基とを有する多鎖多親水基型界面活性剤を含有する。この成分は、本実施形態のO/W型乳化皮膚外用組成物において、乳化粒子を保持している。また、自己凝集を起こしやすく、乳化に撹拌力が必要な構造となっており、他の界面活性剤を含有したもので発生する、乳化破壊後の再乳化、すなわち油性成分の流出が起こりにくい。その為、本実施形態のO/W型乳化皮膚外用組成物を皮膚へ塗布し、水で洗い流した後も、油性成分が残存する。
O/W型乳化皮膚外用組成物は、乳化性高分子を含有する。乳化性高分子とは、界面活性剤を併用せず単独で、あるいは、界面活性剤を併用するとしても少量の添加で、組成物において安定したO/W型乳化分散物となり得る高分子化合物のことである。具体的には、25℃において、水に対して0.01質量%以上の濃度で安定した乳化分散性を有する高分子である。上記のとおり、この成分は、分子内に複数の長鎖疎水基と複数の親水基とを有する多鎖多親水基型界面活性剤とともに、乳化粒子を保持し、塗布後の皮膚に対する油性成分の残存性を向上させる。また、濡れた肌に塗布した場合、この成分は、電解質等により凝集し、水によって希釈され、乳化粒子を保持できなくなる。一方、多鎖多親水基型界面活性剤は、水相で自己凝集するため、乳化分子の破壊が円滑に行われ、油性成分の膜がしっかりと皮膚表面に残る。その後、水で洗い流すことで、水が皮膚上から流れ去り、油性成分の膜が密着する。
[乳化粒子の体積平均粒子径(D50)]
O/W型乳化皮膚外用組成物の試料を、レーザー回折/散乱式粒度分布測定装置(株式会社堀場製作所)を用いて乳化粒子径を測定した。
5℃条件下、B型回転粘度計(RB−80L、東機産業株式会社)、ローター(M3)を用い、O/W型乳化皮膚外用組成物の試料が20000mPa・s以下の場合は6rpm、20000mPa・s以上の場合は3rpmの回転数、測定時間1分で粘度を測定した。
(測定方法)
人工皮革(5cm×5cm)に精製水0.1g及び以下の実施例、比較例のO/W型乳化皮膚外用組成物0.1gを均一に塗布した後、全体を水流で流した。ペーパータオルを用いて人工皮革から水分を軽く除去し、十分に風乾後、残存している油性成分の重量を測定し、その平均値を求め(n=5)、油性成分残存量の処方中油性成分量に対する質量比を質量%で算出した。実施例1及び比較例1の結果を図1に示す。
(評価基準)
A:油性成分の残存量が75質量%以上
B:油性成分の残存量が50質量%以上75質量%未満
C:油性成分の残存量が25質量%以上50質量%未満
D:油性成分の残存量が25質量%未満
以下の調整法によって得られた実施例、比較例のO/W型乳化皮膚外用組成物を40℃の恒温槽に1ヶ月保管し、その後、外観を目視により評価した。
<評価基準>
○:変化なしまたは若干の粘度変化が見られる
△:明らかな粘度変化または油滴の増大が見られる
×:分離している
O/W型乳化皮膚外用組成物について、効果・使用性・安定性の点で組成物として、◎:最も適している、○:適している、×:不適の3段階で評価を行った。
試験試料として、表1に示す処方で、O/W型乳化皮膚外用組成物を調整した。まず、1〜5の各原料を混合し、加温溶解させ、油相部とした。油相部とは別に、6〜12の各原料を混合し、加温した水相部を調整した。そして、油相部と水相部とを混合、乳化させ、乳液状のO/W型乳化皮膚外用組成物を得た。得られた組成物について、上記各項目の評価を行った。その結果を併せて、表1に示した。
試験試料として、表2に示す処方で、O/W型乳化皮膚外用組成物を調整した。まず、1〜8の各原料を混合し、加温溶解させ、油相部とした。油相部とは別に、9〜14を混合し、加温した水相部を調整した。そして、油相部と水相部とを混合、乳化させ、乳液状のO/W型乳化皮膚外用組成物を得た。得られた組成物について、上記各項目の評価を行った。その結果を併せて、表2に示した。
試験試料として、表2に示す処方で、O/W型乳化皮膚外用組成物を調整した。まず、1〜5及び8〜13の各原料を混合し、加溶解させ、油相部とした。油相部とは別に、6、7及び14〜16を混合し、加温した水相部を調整した。そして、油相部と水相部とを混合、乳化させ、乳液状のO/W型乳化皮膚外用組成物を得た。得られた組成物について、上記各項目の評価を行った。その結果を併せて、表3に示した。
(実施例7)乳液
下記の組成に従い、乳液を常法により調製した。
(配合成分) (質量%)
ワセリン 5.0
ホホバ油 5.0
流動パラフィン 10.0
N−ラウロイル−L−グルタミン酸 0.5
ジ(フィトステリル・2−オクチルドデシル)
油溶性カモミラエキス 0.1
ユビデカレノン 0.03
ジラウロイルグルタミン酸リシンナトリウム 0.03
グリセリン 5.0
1、3−ブチレングリコール 10.0
カルボキシビニルポリマー 0.15
アクリル酸・メタクリル酸アルキル共重合体 0.15
パンテノール 0.1
ヒアルロン酸ナトリウム 0.01
フェノキシエタノール 0.3
エタノール 3.0
水酸化ナトリウム 適量
精製水 残部
合計 100.0
pH:7.0(25℃)
粘度:7000 mPa・s(25℃)
下記の組成に従い、日焼け止め乳液を常法により調製した。
(配合成分) (質量%)
トリカプリル酸・カプリン酸グリセリル 2.0
メチルポリシロキサン 3.0
デカメチルシクロペンタシロキサン 5.0
パラメトキシケイ皮酸2−エチルヘキシル 5.0
2,4,6−トリス[4−(2−エチルヘキシル 1.0
オキシカルボニル)アニリノ]−1,3,5−トリアジン
2−[4−(ジエチルアミノ)−2−ヒドロキシ 1.0
ベンゾイル]安息香酸ヘキシルエステル
トコフェロール酢酸エステル 0.1
ポリオキシエチレンセチルエーテル 0.05
ジラウロイルグルタミン酸リシンナトリウム 0.05
アクリロイルジメチルタウリンアンモニウム/ 0.3
ビニルピロリドン共重合体
トリメチルグリシン 0.1
キハダ樹皮エキス 0.1
パラオキシ安息香酸メチル 0.2
エタノール 10.0
水酸化ナトリウム 適量
精製水 残部
合計 100.0
pH:7.0(25℃)
粘度:10000mPa・s(25℃)
下記の組成に従い、リップジェルを常法により調製した。
(配合成分) (質量%)
ワセリン 3.0
スクワラン 5.0
重質流動イソパラフィン 5.0
液状ラノリン 3.0
リンゴ酸ジイソステアリル 3.0
トコフェロール酢酸エステル 0.5
テトラ2−ヘキシルデカン酸アスコルビル 0.1
ジラウロイルグルタミン酸リシンナトリウム 0.05
カルボキシビニルポリマー 0.1
アクリル酸・メタクリル酸アルキル共重合体 0.2
加水分解コラーゲン液 0.1
パラオキシ安息香酸メチル 0.2
水酸化ナトリウム 適量
精製水 残部
合計 100.0
pH:7.0(25℃)
粘度:8300mPa・s(25℃)
Claims (3)
- 流動パラフィン、ワセリン、流動イソパラフィンから選ばれる少なくとも一種と、
ジラウロイルグルタミン酸リシンナトリウムと、
アクリル酸・メタクリル酸アルキル共重合体及び/又はアクリロイルジメチルタウリンアンモニウム/ビニルピロリドン共重合体と、を含有し、
洗い流し後の油性成分残存性試験において、油性成分の残存量が50質量%以上であり、
濡れた肌に塗布し、洗い流すタイプであることを特徴とするO/W型乳化皮膚外用組成物。 - 体積平均粒子径(D50)21μm以上の乳化粒子を有することを特徴とする請求項1に記載のO/W型乳化皮膚外用組成物。
- 前記流動パラフィン、ワセリン、流動イソパラフィンから選ばれる少なくとも一種の前記ジラウロイルグルタミン酸リシンナトリウムに対する質量比が5以上5000以下、かつ、前記アクリル酸・メタクリル酸アルキル共重合体及び/又はアクリロイルジメチルタウリンアンモニウム/ビニルピロリドン共重合体に対する前記ジラウロイルグルタミン酸リシンナトリウムの質量比が0.01以上10以下であることを特徴とする請求項1又は2に記載のO/W型乳化皮膚外用組成物。
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