JP6869507B2 - アミノ酸系アニオン性界面活性剤を含有する組成物の増粘方法及び増粘組成物 - Google Patents
アミノ酸系アニオン性界面活性剤を含有する組成物の増粘方法及び増粘組成物 Download PDFInfo
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- JP6869507B2 JP6869507B2 JP2017092358A JP2017092358A JP6869507B2 JP 6869507 B2 JP6869507 B2 JP 6869507B2 JP 2017092358 A JP2017092358 A JP 2017092358A JP 2017092358 A JP2017092358 A JP 2017092358A JP 6869507 B2 JP6869507 B2 JP 6869507B2
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- alanine
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- anionic surfactant
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- 238000000034 method Methods 0.000 title claims description 16
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Description
(A)式(I)の構造を有するアミノ酸系アニオン性界面活性剤
(B)ベタイン構造を有する両性界面活性剤
(i)Rが炭素数12の直鎖のアシル基、かつn=2、かつAが水酸基、かつXがナトリウム原子
(ii)Rがラウロイル基、n=1、Aが水素原子、Xがナトリウム原子
ロイル−N−ヒドロキシメチル−β−アラニン、カプリロイル−N−ヒドロキシメチル−β−アラニン、ラウロイル−N−ヒドロキシメチル−β−アラニン、ミリストイル−N−ヒドロキシメチル−β−アラニン、ココイル−N−ヒドロキシメチル−β−アラニン、カプロイル−N−ヒドロキシエチル−β−アラニン、カプリロイル−N−ヒドロキシエチル−β−アラニン、ラウロイル−N−ヒドロキシエチル−β−アラニン、ミリストイル−N−ヒドロキシエチル−β−アラニン、ココイル−N−ヒドロキシエチル−β−アラニン、カプロイル−N−ヒドロキシプロピル−β−アラニン、カプリロイル−N−ヒドロキシプロピル−β−アラニン、ラウロイル−N−ヒドロキシプロピルβ−アラニン、ミリストイル−N−ヒドロキシプロピル−β−アラニン、ココイル−N−ヒドロキシプロピル−β−アラニンのアルカリ金属イオン塩またはアルカノールアミン塩が挙げられる。これらの中でも好ましくはRが炭素数が12の直鎖のアシル基、nが2、Aが水酸基、Xがナトリウム原子の組み合わせであるラウロイル−N−ヒドロキシエチル−β−アラニンナトリウム、またはRが炭素数が12の直鎖のアシル基、nが1、Aが水素原子、Xがナトリウム原子の組み合わせであるラウロイル−N−メチル−β−アラニンナトリウムであり、さらに好ましくはRが炭素数が12、nが2、Aが水酸基、Xがナトリウム原子の組み合わせであるラウロイル−N−ヒドロキシエチル−β−アラニンナトリウムである。またA成分の配合量としては質量%濃度で1%(以下、特に記載があるもの以外は、質量%濃度を単に%と示す)以上が好ましい。
チルセルロース、ポリ(塩化ジアリルジメチルアンモニウム/アクリルアミド)コポリマー、高重合ポリエチレングリコール等の高分子化合物;グリセリン、プロピレングリコール、ブチレングリコール、ジプロピレングリコール、グリコシルトレハロース等の湿潤剤;ステアリン酸、ベヘニン酸、オレイン酸等の高級脂肪酸;ミリスチン酸イソプロピル等のエステル油;流動イソパラフィン、ワセリン、スクワラン等の炭化水素;ジメチルポリシロキサン(ジメチコン)、ジメチコノール、アミノ変性シリコーン、ポリエーテル変性シリコーン等のシリコーン類;イソプロピルメチルフェノール、ジンクピリチオン、塩化ベンザルコニウム等の抗フケ成分;エタノール、メタノール、プロピルアルコール、イソプロピルアルコール等の低級アルコール;L−アスパラギン酸、L−アスパラギン酸ナトリウム、DL−アラニン、L−アルギニン、グリシン、L−システイン、Lスレオニン等のアミノ酸;フェノキシエタノール、メチルパラベン、エチルパラベン、プロピルパラベン、メチルクロロイソチアゾリノン等の防腐剤;その他紫外線吸収剤、香料、色剤、金属イオン封鎖剤、酸化防止剤、各種薬剤等が挙げられる。
表1〜表8に記載の組成に従い、実施例1−0〜6−2、及び比較例1−0〜2−2の各試料を常法に準じて調整し、pH、粘度の測定、および泡立ち、外観について評価を行い、その結果を表1〜表8に併せて示す。表中の配合量は全て、組成物質量合計を100%とした際の質量%濃度で示されており、固形分としての値である。
pHは、各実施例及び比較例の組成物を30℃に調温した状態でpHメーター(HORIBA F−52)を用いて測定した。
粘度は、25℃に調整した各実施例及び比較例の組成物に対し、B型粘度型を用いて測定
した。またpHが7.0の際の各組成物(各基準試料)粘度に対する、各pHに調整した際の同組成物粘度の比を増粘度として算出し(数1参照)、算出した増粘度について下記基準に基づき増粘評価を行った。
<増粘評価基準>
◎:増粘度が10以上
○:増粘度が2以上〜10未満
×:増粘度が2未満
5名の専門パネルにより、各実施例及び比較例の組成物をシャンプーとして使用し、使用時の泡立ちについて官能評価により評価を行った。尚、評価基準は以下の通りである。
<泡立ち評価基準>
◎:非常に良好(泡立ちが良いと回答した専門パネルの人数が5名中4名以上)
○:良好(泡立ちが良いと回答した専門パネルの人数が5名中3名)
△:普通(泡立ちが良いと回答した専門パネルの人数が5名中2名)
×:不良(泡立ちが良いと回答した専門パネルの人数が5名中1名以下)
試験者の目視により、各実施例及び比較例の組成物の白濁や析出・分離の有無について、下記評価基準に従って室温環境下にて外観評価を行った。
<外観評価基準>
◎:透明であり、白濁はみられない
○:白濁しているが、組成物構成成分の分離・沈殿はみられない
×:組成物構成成分の析出、および分離・沈殿がみられる
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