JP4246945B2 - Liquid body cleaner composition - Google Patents

Liquid body cleaner composition Download PDF

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Publication number
JP4246945B2
JP4246945B2 JP2001359260A JP2001359260A JP4246945B2 JP 4246945 B2 JP4246945 B2 JP 4246945B2 JP 2001359260 A JP2001359260 A JP 2001359260A JP 2001359260 A JP2001359260 A JP 2001359260A JP 4246945 B2 JP4246945 B2 JP 4246945B2
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Prior art keywords
acid
weight
liquid body
fatty acid
composition
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JP2001359260A
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JP2003160470A (en
Inventor
辰仙 田村
雅喜 井上
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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、高級脂肪酸のカリウム塩を主成分とし、豊かでクリーミーな泡を与え、しかも低温安定性に優れた液体身体洗浄剤組成物に関する。
【0002】
【従来の技術】
従来、高級脂肪酸のナトリウム塩、いわゆるナトリウム石鹸は、その優れた固形物性、耐水性から、広く固形洗浄剤として用いられている。しかし、ナトリウム石鹸は一般にクラフト点が高いため、液体洗浄剤とするには不向きであり、液体洗浄剤とする場合には高級脂肪酸のカリウム塩(カリ石鹸)が用いられている。すなわち、ラウリン酸カリウムやオレイン酸カリウム等のクラフト点の低いカリ石鹸を主成分とした液体洗浄剤とするのが一般的である。
【0003】
【発明が解決しようとする課題】
しかしながら、ラウリン酸カリウムやオレイン酸カリウムを主体とするカリ石鹸を基剤とした液体洗浄剤組成物は、低温安定性は良好であるものの、一般に、キメの粗い泡しか得られないという欠点がある。キメの細かな泡を得るためには、カリ石鹸の脂肪酸組成を、ラウリン酸やオレイン酸よりも高融点の脂肪酸をより多く含むものにしたり、カリ石鹸を完全中和品でなく、一部未中和として遊離脂肪酸を含むようにする等の方法が考えられるが、いずれも低温で結晶化したり、ゲル化するなどの問題があった。特開平8−133962号には低温安定性に優れた液体身体洗浄剤組成物が記載されているが、これも5℃未満での安定性は解決されていない。
【0004】
従って、本発明の目的は、カリ石鹸を主成分とするにもかかわらず、豊かでクリーミーな泡を与え、しかも5℃未満の低温安定性に優れた液体身体洗浄剤組成物を提供することにある。
【0005】
【課題を解決するための手段】
本発明者らは、特定の脂肪酸組成を有するカリ石鹸と遊離脂肪酸を特定の割合で併用すれば、豊かな泡立ちでクリーミーな泡を与え、しかも5℃未満の低温安定性に優れた液体身体洗浄剤組成物が得られることを見出し、本発明を完成した。
【0006】
すなわち、本発明は、高級脂肪酸及びそのカリウム塩を合計で30〜40重量%含有する液体身体洗浄剤組成物であって、その脂肪酸組成が、ラウリン酸30〜60重量%、ミリスチン酸20〜70重量%、パルミチン酸5〜25重量%及びステアリン酸0〜3重量%であり、高級脂肪酸:高級脂肪酸のカリウム塩の重量比が0.001:99.999〜1:99であることを特徴とする液体身体洗浄剤組成物を提供するものである。
【0007】
【発明の実施の形態】
本発明で用いられる高級脂肪酸及びそのカリウム塩は、その脂肪酸組成がラウリン酸30〜60重量%、ミリスチン酸20〜70重量%、パルミチン酸5〜25重量%、ステアリン酸0〜3重量%であることが必要であり、特にラウリン酸35〜45重量%、ミリスチン酸40〜60重量%、パルミチン酸5〜15重量%及びステアリン酸0〜2重量%であるのが好ましい。これらの脂肪酸は、それぞれ高純度の脂肪酸を前記のような脂肪酸組成となるよう混合して用いてもよく、あるいはヤシ油脂肪酸のような混合脂肪酸を用い、これに適宜構成脂肪酸を加えて前記の脂肪酸組成となるようにしてもよい。混合脂肪酸を用いた場合、カプロン酸、カプリル酸、アラキン酸、ヘキサデセン酸、オレイン酸、リノール酸等が少量混ざってくることがあるが、本発明の効果を損わない範囲、例えばこれらの合計が1重量%未満であれば、差し支えない。
【0008】
本発明の液体身体洗浄剤組成物には、前記の脂肪酸組成を有する高級脂肪酸及びそのカリウム塩を合計で30〜40重量%配合する。また、高級脂肪酸:高級脂肪酸のカリウム塩の重量比は0.001:99.999〜1:99であり、好ましくは0.005:99.995〜1:99、特に0.05:99.95〜1.0:99.0である。即ち、実質的にフリーのアルカリ(水酸化カリウム)を含まない範囲であり、これらの範囲内で、豊かでクリーミーな泡立ちと優れた低温安定性が得られる。
【0009】
本発明の液体身体洗浄剤組成物は、前記の組成となる脂肪酸及びそのカリウム塩をそれぞれ配合することにより製造することもできるが、典型的には、30〜90℃程度に加温した水酸化カリウムを含む水溶液に、脂肪酸を攪拌しつつ加え、一定量の遊離脂肪酸を残存させるようにして製造することができる。添加する脂肪酸は、30〜90℃程度に加温融解してもよいし、固体であってもフレーク等の形態であれば、そのまま加えて中和溶解してもよい。
【0010】
本発明の液体身体洗浄剤組成物には、通常液体身体洗浄剤組成物に用いられる各種の成分、例えばアルキルエーテル硫酸塩、アルキルリン酸塩等のアニオン界面活性剤;イミダゾリン系、ベタイン系等の両性界面活性剤;アルキルグルコシド、脂肪酸アルカノールアミド、アルキルジメチルアミンオキサイド等の非イオン界面活性剤;プロピレングリコール、ジプロピレングリコール、グリセリン等のポリオール類;塩類、エタノール、水溶性高分子等の粘度調整剤;カチオンポリマー等の感触向上剤;2−エチルヘキサン酸トリグリセリド等の油剤;パラベン、EDTA、BHT等の保存剤;エチレングリコールジステアレート等のパール化剤;トリクロサン等のデオドラント剤;架橋ポリアクリル酸ナトリウム等のスクラブ剤;その他色素、香料等を、本発明の効果を損なわない範囲で適宜配合することができる。
【0011】
本発明の液体身体洗浄剤組成物は、25℃における5%水溶液のpHが9〜12、好ましくは9.5〜11、特に好ましくは9.9〜10.9になるよう調整するのが好ましい。また、本発明において「液体」とは、ポンプによる輸送、配合などが可能で、ポンプ容器から排出可能なことをいい、好ましくは30℃における粘度(BM型粘度計、ローターNo.2、30rpmで測定)が5000mPa・s以下が好ましく、2000mPa・s以下が更に好ましく、特に200mPa・s以下であるのが好ましい。
【0012】
【発明の効果】
本発明の液体身体洗浄剤組成物は、カリウム石鹸を主成分とするにもかかわらず、豊かな泡立ちでクリーミーな泡を与え、しかも5℃未満の低温安定性に優れたものである。
【0013】
【実施例】
実施例1〜5、比較例1〜8
表1及び表2に示す組成の液体身体洗浄剤組成物を製造し、泡立ち、泡質及び保存安定性について評価した。結果を表1及び表2に示す。
【0014】
(製造方法)
約70℃に加熱した精製水に水酸化カリウムを加え、更に脂肪酸を加え、均一に混合して液体洗浄剤組成物を得た。
【0015】
(評価方法)
(1)泡立ち:各洗浄剤組成物について、10倍希釈水溶液を調製し、この水溶液100mL(液温40℃)を目盛付きシリンダーに注入した。次いで、水溶液中に攪拌羽根を設置して羽根を回転させ、攪拌開始から30秒後において生じた泡の体積(mL)を測定して泡立ち量とし、下記基準で評価した。なお、攪拌羽根の回転数は1,000r/minであり、5秒毎に反転させた。
◎;泡立ち量 200mL以上。
○;泡立ち量 160mL以上200mL未満。
△;泡立ち量 120mL以上160mL未満。
×;泡立ち量 120mL未満。
【0016】
(2)泡質:各液体洗浄剤組成物について、10名の専門パネラーが原液1mLを手に取り適量の水とともに手をすり合わせる手洗い試験を行い、下記基準により泡質を評価した。
5;非常にクリーミーな泡である。
4;クリーミーな泡である。
3;普通の泡である。
2;やや粗い泡である。
1;粗い泡である。
これらの評価の平均値を算出し、以下の基準で判定した。
◎;平均値が4.5以上。
○;平均値が3.5〜4.4。
△;平均値が2.5〜3.4。
×;平均値が2.4以下。
【0017】
(3)保存安定性:各洗浄剤組成物50mLをガラス製スクリュー管に充填して密閉し、0℃及び40℃の恒温室中で1ケ月保存した。1ケ月後、その内容物の液の状態を目視観察し、下記基準で評価した。
○;均一な透明液体である。
×;結晶が析出、白濁している又はゲル化している。
【0018】
【表1】

Figure 0004246945
【0019】
【表2】
Figure 0004246945
【0020】
実施例6
以下に示す組成の液体身体洗浄剤組成物を実施例1〜5と同様にして製造し、泡立ち、泡質及び保存安定性について評価した。評価方法は、保存安定性の評価基準を除き、実施例1〜5、比較例1〜8と同様の方法で行った。
保存安定性:各洗浄剤組成物50mLをガラス製スクリュー管に充填して密閉し、0℃及び40℃の恒温室中で1ケ月保存した。1ケ月後、その内容物の液の状態を目視観察し、下記基準で評価した。
○;均一なパール状液体である。
×;分離している又はゲル化している。
結果を表3に示す。
Figure 0004246945
【0021】
【表3】
Figure 0004246945
【0022】
得られた洗浄剤組成物は、豊かでクリーミーな泡であり、しかも低温安定性も優れたものであった。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid body cleaner composition comprising a potassium salt of a higher fatty acid as a main component, giving rich and creamy foam, and having excellent low-temperature stability.
[0002]
[Prior art]
Conventionally, sodium salts of higher fatty acids, so-called sodium soaps, have been widely used as solid detergents due to their excellent solid physical properties and water resistance. However, since sodium soap generally has a high Kraft point, it is unsuitable for use as a liquid detergent, and when used as a liquid detergent, potassium salts of higher fatty acids (potassium soap) are used. That is, it is common to use a liquid detergent mainly composed of potassium soap having a low Kraft point such as potassium laurate or potassium oleate.
[0003]
[Problems to be solved by the invention]
However, a liquid detergent composition based on potash soap mainly composed of potassium laurate or potassium oleate has a defect that, although it has good low-temperature stability, generally only rough foam can be obtained. . In order to obtain fine, fine bubbles, the fatty acid composition of potash soap should be higher in fatty acids with a higher melting point than lauric acid or oleic acid, or potash soap should not be completely neutralized and partially Methods such as including free fatty acids as neutralization are conceivable, but all have problems such as crystallization and gelation at low temperatures. JP-A-8-133962 describes a liquid body cleaner composition having excellent low-temperature stability, but this also does not solve the stability below 5 ° C.
[0004]
Accordingly, an object of the present invention is to provide a liquid body cleansing composition that provides rich and creamy foams and is excellent in low-temperature stability of less than 5 ° C. despite being mainly composed of potash soap. is there.
[0005]
[Means for Solving the Problems]
The inventors of the present invention have provided a liquid body wash that provides rich foaming and creamy foam, and has excellent low-temperature stability of less than 5 ° C., when potash soap having a specific fatty acid composition and free fatty acid are used in a specific ratio. The present invention was completed by finding that an agent composition was obtained.
[0006]
That is, the present invention is a liquid body cleaning composition containing a higher fatty acid and a potassium salt thereof in a total amount of 30 to 40% by weight, the fatty acid composition being 30 to 60% by weight of lauric acid and 20 to 70 of myristic acid. % By weight, 5 to 25% by weight palmitic acid and 0 to 3% by weight stearic acid, and the weight ratio of higher fatty acid to higher fatty acid potassium salt is 0.001: 99.999 to 1:99. A liquid body cleansing composition is provided.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The higher fatty acid and its potassium salt used in the present invention have a fatty acid composition of 30 to 60% by weight of lauric acid, 20 to 70% by weight of myristic acid, 5 to 25% by weight of palmitic acid, and 0 to 3% by weight of stearic acid. In particular, 35 to 45% by weight of lauric acid, 40 to 60% by weight of myristic acid, 5 to 15% by weight of palmitic acid and 0 to 2% by weight of stearic acid are preferable. These fatty acids may be used by mixing high-purity fatty acids so as to have the fatty acid composition as described above, or using a mixed fatty acid such as coconut oil fatty acid, and appropriately adding a constituent fatty acid to the above-mentioned fatty acid. You may make it become a fatty-acid composition. When mixed fatty acids are used, a small amount of caproic acid, caprylic acid, arachidic acid, hexadecenoic acid, oleic acid, linoleic acid, etc. may be mixed, but a range that does not impair the effect of the present invention, for example, the total of these If it is less than 1% by weight, there is no problem.
[0008]
In the liquid body cleansing composition of the present invention, a higher fatty acid having the above fatty acid composition and its potassium salt are blended in a total amount of 30 to 40% by weight. The weight ratio of higher fatty acid: potassium salt of higher fatty acid is 0.001: 99.999 to 1:99, preferably 0.005: 99.995 to 1:99, particularly 0.05: 99.95. -1.0: 99.0. That is, it is a range which does not contain substantially free alkali (potassium hydroxide), and within these ranges, rich and creamy foaming and excellent low-temperature stability can be obtained.
[0009]
The liquid body cleansing composition of the present invention can be produced by blending the fatty acid having the above composition and its potassium salt, respectively. Typically, the hydroxylated water is heated to about 30 to 90 ° C. A fatty acid can be added to an aqueous solution containing potassium while stirring to leave a certain amount of free fatty acid. The fatty acid to be added may be heated and melted to about 30 to 90 ° C., or it may be added as it is and neutralized and dissolved as long as it is in the form of flakes or the like.
[0010]
The liquid body cleansing composition of the present invention includes various components usually used in liquid body cleansing compositions, for example, anionic surfactants such as alkyl ether sulfates and alkyl phosphates; imidazoline series, betaine series, etc. Amphoteric surfactants; Nonionic surfactants such as alkyl glucosides, fatty acid alkanolamides and alkyldimethylamine oxides; Polyols such as propylene glycol, dipropylene glycol and glycerin; Viscosity modifiers such as salts, ethanol and water-soluble polymers ; Feeling improver such as cationic polymer; Oil agent such as 2-ethylhexanoic acid triglyceride; Preservative such as paraben, EDTA and BHT; Pearling agent such as ethylene glycol distearate; Deodorant agent such as triclosan; Crosslinked polyacrylic acid Scrub agents such as sodium; other colors , Perfumes and the like, can be appropriately compounded within a range not to impair the effects of the present invention.
[0011]
The liquid body cleansing composition of the present invention is preferably adjusted so that the pH of a 5% aqueous solution at 25 ° C. is 9 to 12, preferably 9.5 to 11, particularly preferably 9.9 to 10.9. . Further, in the present invention, “liquid” means that it can be transported and blended by a pump and discharged from a pump container, and preferably has a viscosity at 30 ° C. (BM type viscometer, rotor No. 2, 30 rpm). (Measurement) is preferably 5000 mPa · s or less, more preferably 2000 mPa · s or less, and particularly preferably 200 mPa · s or less.
[0012]
【The invention's effect】
The liquid body cleansing composition of the present invention provides rich foaming and creamy foam despite having potassium soap as a main component, and is excellent in low-temperature stability of less than 5 ° C.
[0013]
【Example】
Examples 1-5, Comparative Examples 1-8
Liquid body cleansing compositions having the compositions shown in Tables 1 and 2 were produced and evaluated for foaming, foam quality and storage stability. The results are shown in Tables 1 and 2.
[0014]
(Production method)
Potassium hydroxide was added to purified water heated to about 70 ° C., fatty acid was further added, and mixed uniformly to obtain a liquid detergent composition.
[0015]
(Evaluation methods)
(1) Foaming: A 10-fold diluted aqueous solution was prepared for each cleaning composition, and 100 mL of this aqueous solution (liquid temperature 40 ° C.) was poured into a graduated cylinder. Next, a stirring blade was installed in the aqueous solution, the blade was rotated, and the volume (mL) of the foam generated 30 seconds after the start of stirring was measured as the amount of foaming, and evaluated according to the following criteria. The rotation speed of the stirring blade was 1,000 r / min, and was reversed every 5 seconds.
A: Foaming amount 200 mL or more.
○: Foaming amount is 160 mL or more and less than 200 mL.
Δ: Foaming amount 120 mL or more and less than 160 mL.
×: Foaming amount is less than 120 mL.
[0016]
(2) Foam quality: For each liquid detergent composition, 10 expert panelists took 1 mL of the stock solution and rubbed their hands with an appropriate amount of water, and evaluated the foam quality according to the following criteria.
5; Very creamy foam.
4; Creamy foam.
3; Normal foam.
2: Slightly coarse foam.
1; It is a rough foam.
The average value of these evaluations was calculated and judged according to the following criteria.
A: Average value is 4.5 or more.
A: The average value is 3.5 to 4.4.
Δ: The average value is 2.5 to 3.4.
X: The average value is 2.4 or less.
[0017]
(3) Storage stability: 50 mL of each cleaning composition was filled in a glass screw tube, sealed, and stored in a thermostatic chamber at 0 ° C. and 40 ° C. for 1 month. One month later, the liquid state of the contents was visually observed and evaluated according to the following criteria.
A: A uniform transparent liquid.
X: Crystals are precipitated, cloudy or gelled.
[0018]
[Table 1]
Figure 0004246945
[0019]
[Table 2]
Figure 0004246945
[0020]
Example 6
A liquid body cleansing composition having the following composition was produced in the same manner as in Examples 1 to 5 and evaluated for foaming, foam quality and storage stability. The evaluation method was the same as in Examples 1 to 5 and Comparative Examples 1 to 8, except for the storage stability evaluation criteria.
Storage stability: 50 mL of each cleaning composition was filled in a glass screw tube, sealed, and stored in a thermostatic chamber at 0 ° C. and 40 ° C. for 1 month. One month later, the liquid state of the contents was visually observed and evaluated according to the following criteria.
○: Uniform pearl liquid.
X: Separated or gelled.
The results are shown in Table 3.
Figure 0004246945
[0021]
[Table 3]
Figure 0004246945
[0022]
The obtained detergent composition was rich and creamy foam, and had excellent low-temperature stability.

Claims (3)

高級脂肪酸及びそのカリウム塩を合計で30〜40重量%含有する液体身体洗浄剤組成物であって、その脂肪酸組成が、ラウリン酸30〜60重量%、ミリスチン酸20〜70重量%、パルミチン酸5〜25重量%及びステアリン酸0〜3重量%であり、高級脂肪酸:高級脂肪酸のカリウム塩の重量比が0.05:99.95〜0.9:99.1であり、25℃における5%水溶液の pH が9.9〜10.9であることを特徴とする液体身体洗浄剤組成物。A liquid body cleansing composition containing a total of 30 to 40% by weight of higher fatty acids and potassium salts thereof, the fatty acid composition being 30 to 60% by weight of lauric acid, 20 to 70% by weight of myristic acid, 5% palmitic acid a 25% by weight and 0-3% by weight of stearic acid, a higher fatty acid weight ratio of the potassium salt of a higher fatty acid is 0.05: 99.95 to 0.9: 99.1 der is, 5 at 25 ° C. A liquid body cleansing composition, wherein the pH of the aqueous solution is 9.9 to 10.9 . 30℃における粘度が5000mPa・s以下である請求項1記載の液体身体洗浄剤組成物。The liquid body cleaning composition according to claim 1 , wherein the viscosity at 30 ° C is 5000 mPa · s or less . 脂肪酸組成が、ラウリン酸35〜45重量%、ミリスチン酸40〜60重量%、パルミチン酸5〜15重量%及びステアリン酸0〜2重量%である請求項1又は2記載の液体身体洗浄剤組成物。The liquid body cleaning composition according to claim 1 or 2 , wherein the fatty acid composition is 35 to 45% by weight of lauric acid, 40 to 60% by weight of myristic acid, 5 to 15% by weight of palmitic acid and 0 to 2% by weight of stearic acid . .
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