JP5525837B2 - Solid cleaning composition - Google Patents
Solid cleaning composition Download PDFInfo
- Publication number
- JP5525837B2 JP5525837B2 JP2010017377A JP2010017377A JP5525837B2 JP 5525837 B2 JP5525837 B2 JP 5525837B2 JP 2010017377 A JP2010017377 A JP 2010017377A JP 2010017377 A JP2010017377 A JP 2010017377A JP 5525837 B2 JP5525837 B2 JP 5525837B2
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- JP
- Japan
- Prior art keywords
- mass
- cleaning composition
- counter ion
- solid cleaning
- present
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000203 mixture Substances 0.000 title claims description 45
- 238000004140 cleaning Methods 0.000 title claims description 28
- 239000007787 solid Substances 0.000 title claims description 23
- -1 hydroxyalkyl ether carboxylate Chemical class 0.000 claims description 32
- 150000002500 ions Chemical class 0.000 claims description 20
- HZAXFHJVJLSVMW-UHFFFAOYSA-N 2-Aminoethan-1-ol Chemical compound NCCO HZAXFHJVJLSVMW-UHFFFAOYSA-N 0.000 claims description 15
- 238000006386 neutralization reaction Methods 0.000 claims description 14
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 12
- 239000004094 surface-active agent Substances 0.000 claims description 12
- 239000002253 acid Substances 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 150000005215 alkyl ethers Chemical class 0.000 claims description 8
- 229920006317 cationic polymer Polymers 0.000 claims description 7
- 238000013329 compounding Methods 0.000 claims description 6
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical group C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 claims description 5
- 239000002738 chelating agent Substances 0.000 claims description 5
- GOOHAUXETOMSMM-UHFFFAOYSA-N Propylene oxide Chemical group CC1CO1 GOOHAUXETOMSMM-UHFFFAOYSA-N 0.000 claims description 4
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical group C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 239000004202 carbamide Substances 0.000 claims description 4
- 125000001183 hydrocarbyl group Chemical group 0.000 claims description 4
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 claims description 3
- NPYPAHLBTDXSSS-UHFFFAOYSA-N Potassium ion Chemical compound [K+] NPYPAHLBTDXSSS-UHFFFAOYSA-N 0.000 claims description 2
- 239000003599 detergent Substances 0.000 claims description 2
- 229910001414 potassium ion Inorganic materials 0.000 claims description 2
- 229940024606 amino acid Drugs 0.000 description 22
- 235000001014 amino acid Nutrition 0.000 description 22
- 125000002252 acyl group Chemical group 0.000 description 18
- 230000002378 acidificating effect Effects 0.000 description 16
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- 239000004973 liquid crystal related substance Substances 0.000 description 8
- 239000011593 sulfur Substances 0.000 description 8
- 229910052717 sulfur Inorganic materials 0.000 description 8
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 7
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- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 5
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- 229910052700 potassium Inorganic materials 0.000 description 5
- 239000011591 potassium Substances 0.000 description 5
- 150000003672 ureas Chemical class 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 4
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- GSEJCLTVZPLZKY-UHFFFAOYSA-N Triethanolamine Chemical compound OCCN(CCO)CCO GSEJCLTVZPLZKY-UHFFFAOYSA-N 0.000 description 4
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- JPPRXACMNPYJNK-UHFFFAOYSA-N 1-docosoxydocosane Chemical compound CCCCCCCCCCCCCCCCCCCCCCOCCCCCCCCCCCCCCCCCCCCCC JPPRXACMNPYJNK-UHFFFAOYSA-N 0.000 description 3
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- 125000000217 alkyl group Chemical group 0.000 description 3
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- XOAAWQZATWQOTB-UHFFFAOYSA-N taurine Chemical class NCCS(O)(=O)=O XOAAWQZATWQOTB-UHFFFAOYSA-N 0.000 description 3
- UYZQWKKNVBJVOF-UHFFFAOYSA-N 1-decoxytetradecane Chemical compound CCCCCCCCCCCCCCOCCCCCCCCCC UYZQWKKNVBJVOF-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 2
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- 239000000654 additive Substances 0.000 description 2
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- 239000003513 alkali Substances 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
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- 239000013078 crystal Substances 0.000 description 2
- 125000002704 decyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 125000003438 dodecyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 229960002989 glutamic acid Drugs 0.000 description 2
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- UMGDCJDMYOKAJW-UHFFFAOYSA-N thiourea Chemical compound NC(N)=S UMGDCJDMYOKAJW-UHFFFAOYSA-N 0.000 description 2
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- KIUKXJAPPMFGSW-DNGZLQJQSA-N (2S,3S,4S,5R,6R)-6-[(2S,3R,4R,5S,6R)-3-Acetamido-2-[(2S,3S,4R,5R,6R)-6-[(2R,3R,4R,5S,6R)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-2-carboxy-4,5-dihydroxyoxan-3-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-4-yl]oxy-3,4,5-trihydroxyoxane-2-carboxylic acid Chemical compound CC(=O)N[C@H]1[C@H](O)O[C@H](CO)[C@@H](O)[C@@H]1O[C@H]1[C@H](O)[C@@H](O)[C@H](O[C@H]2[C@@H]([C@@H](O[C@H]3[C@@H]([C@@H](O)[C@H](O)[C@H](O3)C(O)=O)O)[C@H](O)[C@@H](CO)O2)NC(C)=O)[C@@H](C(O)=O)O1 KIUKXJAPPMFGSW-DNGZLQJQSA-N 0.000 description 1
- OMDQUFIYNPYJFM-XKDAHURESA-N (2r,3r,4s,5r,6s)-2-(hydroxymethyl)-6-[[(2r,3s,4r,5s,6r)-4,5,6-trihydroxy-3-[(2s,3s,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]methoxy]oxane-3,4,5-triol Chemical compound O[C@@H]1[C@@H](O)[C@@H](O)[C@@H](CO)O[C@@H]1OC[C@@H]1[C@@H](O[C@H]2[C@H]([C@@H](O)[C@H](O)[C@@H](CO)O2)O)[C@H](O)[C@H](O)[C@H](O)O1 OMDQUFIYNPYJFM-XKDAHURESA-N 0.000 description 1
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229920001451 polypropylene glycol Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 229940079889 pyrrolidonecarboxylic acid Drugs 0.000 description 1
- 239000001397 quillaja saponaria molina bark Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229930182490 saponin Natural products 0.000 description 1
- 150000007949 saponins Chemical class 0.000 description 1
- 235000017709 saponins Nutrition 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 229940045920 sodium pyrrolidone carboxylate Drugs 0.000 description 1
- HYRLWUFWDYFEES-UHFFFAOYSA-M sodium;2-oxopyrrolidine-1-carboxylate Chemical compound [Na+].[O-]C(=O)N1CCCC1=O HYRLWUFWDYFEES-UHFFFAOYSA-M 0.000 description 1
- IZYCZYCJLXEFOG-UHFFFAOYSA-M sodium;dodecane-1,2-diol;acetate Chemical compound [Na+].CC([O-])=O.CCCCCCCCCCC(O)CO IZYCZYCJLXEFOG-UHFFFAOYSA-M 0.000 description 1
- 239000013042 solid detergent Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-L sulfite Chemical class [O-]S([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-L 0.000 description 1
- 150000003871 sulfonates Chemical class 0.000 description 1
- 150000003463 sulfur Chemical class 0.000 description 1
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 229960003080 taurine Drugs 0.000 description 1
- 125000005063 tetradecenyl group Chemical group C(=CCCCCCCCCCCCC)* 0.000 description 1
- 229930195735 unsaturated hydrocarbon Natural products 0.000 description 1
- 229920003169 water-soluble polymer Polymers 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 239000004711 α-olefin Substances 0.000 description 1
Description
本発明は固形洗浄組成物、特にＮ−アシルアミノ酸塩を主成分とする組成物の溶け減りの改良に関する。 The present invention relates to an improvement in dissolution of a solid cleaning composition, particularly a composition mainly composed of an N-acylamino acid salt.
透明固形洗浄組成物は高級感を与え、商品価値が高いところから、特に洗顔用石鹸などに用いられている。
ところで、従来の透明固形洗浄組成物は、脂肪酸石鹸を基剤とし、ショ糖、グリセリン、ソルビトール、プロピレングリコールなどのサッカライド類またはポリオール類を透明化剤として使用し、枠ねり法あるいは機械ねり法により製造しているのが通例である。
The transparent solid cleaning composition gives a high-class feeling and has a high commercial value, so that it is used particularly for a facial soap.
By the way, the conventional transparent solid cleaning composition uses fatty acid soap as a base, uses saccharides such as sucrose, glycerin, sorbitol, propylene glycol or polyols as a clarifying agent, and uses a frame bending method or a mechanical bending method. It is customary to manufacture.
このようにして製造された透明固形洗浄組成物の透明化の構造的メカニズムは、可視光線に対して光学的に不連続な大きさである不透明固形洗浄組成物の繊維状微結晶群が、主として繊維軸に対して垂直に分断されて、それが可視光線の波長以下に微細化されて固形洗浄組成物が透明化しているものと考えられる。 The structural mechanism of transparency of the transparent solid cleaning composition produced in this way is mainly the fibrous microcrystal group of the opaque solid cleaning composition having an optically discontinuous size with respect to visible light. It is considered that the solid cleaning composition is made transparent by being divided perpendicularly to the fiber axis and being refined below the wavelength of visible light.
しかしながら、このような透明化の機構で得られた透明固形洗浄組成物では、未だ透明感の優れたものではなく、また使用途中において石鹸表面がゲル化し不透明になるなど、商品価値が損なわれる傾向が認められた。 However, the transparent solid cleaning composition obtained by such a clearing mechanism is not yet excellent in transparency, and the commercial value tends to be impaired, for example, the soap surface becomes gelled and opaque during use. Was recognized.
そこで、従来においてもＮ−長鎖アシル酸性アミノ酸塩を主成分とした透明固形洗浄組成物が開発されている（特開平６−２６４０９２，特開平４−１２９７等）。
しかしながら、これらのアミノ酸塩系透明固形洗浄組成物にあっても、やや溶け減りが大きく、透明性を維持しつつ保形性、溶け減りの適正化を図ることは困難であった。
Therefore, transparent solid cleaning compositions based on N-long chain acyl acidic amino acid salts as the main component have been developed (JP-A-6-264092, JP-A-4-1297, etc.).
However, even these amino acid salt-based transparent solid cleaning compositions are slightly melted down, and it has been difficult to optimize shape retention and melt-down while maintaining transparency.
本発明は前記従来技術に鑑みなされたものであり、その解決すべき課題はアミノ酸系固形洗浄組成物において、その良好な外観を損なうことなく、保形性、溶け減りの改善を図ることにある。 The present invention has been made in view of the above prior art, and the problem to be solved is to improve the shape retention and melt-down without impairing the good appearance of the amino acid-based solid cleaning composition. .
本発明者らは、Ｎ−長鎖アシル酸性アミノ酸塩と共存する界面活性剤の検討を進めた結果、アミノ酸塩とともに特定の非イオン性界面活性剤を用いることにより、溶け減りの大幅な改善が図られることを見いだし、本発明を完成するにいたった。 As a result of studying a surfactant that coexists with an N-long chain acyl acidic amino acid salt, the present inventors have significantly improved dissolution by using a specific nonionic surfactant together with the amino acid salt. As a result, the present invention has been completed.
すなわち本発明は、Ｎ−アシルアミノ酸塩を主成分とする透明洗浄剤組成物であって、
ポリオキシアルキレンアルキルエーテル Ｒ−（ＡＯ）ｎＨ
（ここで、ＲはＣ１４〜Ｃ３６の直鎖または分岐の炭化水素基、ＡＯはエチレンオキサイド基、プロピレンオキサイド基、ブチレンオキサイド基から選択される残基であって、ｎは１５〜５０、かつＩＯＢ値が１．２〜１．４である）を１〜３質量％含み、
That is, the present invention is a transparent detergent composition mainly composed of an N-acyl amino acid salt,
Polyoxyalkylene alkyl ether R- (AO) nH
Wherein R is a C14 to C36 linear or branched hydrocarbon group, AO is a residue selected from an ethylene oxide group, a propylene oxide group, and a butylene oxide group, n is 15 to 50, and IOB 1 to 3% by mass)),
また、前記Ｎ−アシルアミノ酸に対する対イオンは、エタノールアミンからなる対イオン４０〜６０％と、カリウムイオンならなる対イオン４０〜６０％と、を含み、
前記Ｎ−アシルアミノ酸の対イオンによる中和度は、１．６〜２．０であることを特徴とする。
以下、本発明の構成について詳述する。
The counter ion for the N-acylamino acid contains 40 to 60% counter ion composed of ethanolamine and 40 to 60% counter ion composed of potassium ion,
The neutralization degree of the N-acylamino acid with a counter ion is 1.6 to 2.0.
Hereinafter, the configuration of the present invention will be described in detail.
［Ｎ−長鎖アシル酸性アミノ酸及びその対イオン］
本発明において用いられるＮ−長鎖アシル酸性アミノ酸としては、Ｎ−直鎖アシルグルタミン酸、Ｎ−長鎖アシルアスパラギン酸等が挙げられる。
また、Ｎ−アシルアミノ酸に対する対イオンは、エタノールアミンからなる対イオン４０〜６０％、アルカリ金属ならなる対イオン４０〜６０％、である必要がある。
[N-long chain acyl acidic amino acid and its counter ion]
Examples of the N-long chain acyl acidic amino acid used in the present invention include N-linear acyl glutamic acid and N-long chain acyl aspartic acid.
Further, the counter ion for N-acylamino acid needs to be 40 to 60% counter ion composed of ethanolamine and 40 to 60% counter ion composed of alkali metal.
エタノールアミンのモル構成比６０％を超える場合高温保存性が悪化し褐変を生じやすく、また４０未満の場合透明性が悪化する。
Ｎ−長鎖アシル酸性アミノ酸の塩としての配合量は、対イオンのモル構成比により異なるが、本発明の透明状態とするためにはその配合量は35質量％ないし80質量％、好ましくは40質量％ないし70質量％である。
When the molar composition ratio of ethanolamine exceeds 60%, high temperature storage stability is deteriorated and browning is likely to occur, and when it is less than 40, transparency is deteriorated.
The compounding amount of the N-long-chain acyl acidic amino acid as a salt varies depending on the molar composition ratio of the counter ion, but the compounding amount is 35% by mass to 80% by mass, preferably 40% in order to obtain the transparent state of the present invention. % By mass to 70% by mass.
ところで、本発明において得られる透明固形洗浄組成物は、従来の透明石鹸に比較してその透明性が特に優れており、これは結晶構造が液晶状態であることによる。
そして同じ原料を使用しても、液晶状態が得られなければ、透明性が従来の透明石鹸と同程度となってしまうことが確認されている。
By the way, the transparent solid cleaning composition obtained in the present invention is particularly excellent in transparency as compared with the conventional transparent soap, and this is because the crystal structure is in a liquid crystal state.
And even if it uses the same raw material, if a liquid crystal state is not obtained, it will be confirmed that transparency will become comparable to the conventional transparent soap.
さらに液晶状態にない透明石鹸では使用中に石鹸表面がゲル化し不透明になる等の問題が生じたが、これは水不溶性部分が残存するためである。従って、本発明のように洗浄組成物全体が均一な液晶系である透明固形洗浄組成物では水不溶性部分が残存するようなことがなく、使用中に石鹸表面がゲル化し不透明になってしまうようなこともない。
このように、本発明にかかる透明固形洗浄組成物はその結晶構造が液晶であることから極めて優れた透明性、透明安定性を有しているのである。
Further, in the case of transparent soap that is not in a liquid crystal state, problems such as gelation and opaqueness of the soap surface occur during use, but this is because a water-insoluble portion remains. Therefore, in the transparent solid cleaning composition in which the entire cleaning composition is a uniform liquid crystal system as in the present invention, the water-insoluble portion does not remain, and the soap surface gels and becomes opaque during use. There is nothing wrong.
Thus, the transparent solid cleaning composition according to the present invention has extremely excellent transparency and transparency stability because its crystal structure is liquid crystal.
ここで、Ｎ−長鎖アシル酸性アミノ酸塩はＮ−長鎖アシル酸性アミノ酸をアルカリで中和することにより容易に得られるが、その際の中和度が液晶の形成に影響を及ぼす。 Here, the N-long-chain acyl acidic amino acid salt can be easily obtained by neutralizing the N-long-chain acyl acidic amino acid with an alkali, and the degree of neutralization at that time affects the formation of liquid crystals.
すなわち、良好な液晶状態を得るには、本発明の対イオンを採用した場合には、Ｎ−長鎖アシル酸性アミノ酸に対するアルカリの中和度を１．６当量以上、好ましくは１．８当量以上にする必要がある。中和度が１．６当量未満のＮ−長鎖アシル酸性アミノ酸塩では白濁しやすく、透明固形の液晶を得ることができない。
尚、Ｎ−長鎖アシル酸性アミノ酸モノ塩とＮ−長鎖アシル酸性アミノ酸ジ塩を混合して、混合物の中和度が１．６当量以上となるようにしてもよい。
That is, in order to obtain a good liquid crystal state, when the counter ion of the present invention is employed, the degree of neutralization of alkali with respect to the N-long chain acyl acidic amino acid is 1.6 equivalents or more, preferably 1.8 equivalents or more. It is necessary to. N-long-chain acyl acidic amino acid salts with a neutralization degree of less than 1.6 equivalents tend to be cloudy, and a transparent solid liquid crystal cannot be obtained.
N-long chain acyl acidic amino acid mono-salt and N-long chain acyl acidic amino acid di-salt may be mixed so that the neutralization degree of the mixture is 1.6 equivalents or more.
また、本発明にかかる洗浄組成物のpHは１％水溶液での測定で６．３〜７．５、好まくは６．８±０．３の範囲であることが好適である。
pHが6.3以下となると透明性に悪影響を与え、またpHが7.5以上となると褐変を生じやすくなる。
なお、本発明にかかる固形洗浄剤組成物は、基剤としては透明であるが、顔料などの配合により不透明になる場合も含まれる。
Further, the pH of the cleaning composition according to the present invention is preferably in the range of 6.3 to 7.5, preferably 6.8 ± 0.3, as measured with a 1% aqueous solution.
When the pH is 6.3 or less, the transparency is adversely affected, and when the pH is 7.5 or more, browning is likely to occur.
In addition, although the solid detergent composition concerning this invention is transparent as a base, the case where it becomes opaque by the mixing | blending of a pigment etc. is also included.
［ポリオキシアルキレンアルキルエーテル］
本発明において特徴的なポリオキシアルキレンアルキルエーテルは、
Ｒ−（ＡＯ）ｎ−Ｈ
（ここで、ＲはＣ１４〜Ｃ３６の直鎖または分岐の炭化水素基、ＡＯはエチレンオキサイド基、プロピレンオキサイド基、ブチレンオキサイド基から選択される残基であって、ｎは１５〜５０、かつＩＯＢ値が１．２〜１．４である）の構造を有する。
[Polyoxyalkylene alkyl ether]
The polyoxyalkylene alkyl ether characteristic in the present invention is:
R- (AO) n-H
Wherein R is a C14 to C36 linear or branched hydrocarbon group, AO is a residue selected from an ethylene oxide group, a propylene oxide group, and a butylene oxide group, n is 15 to 50, and IOB The value is 1.2 to 1.4).
そして、ＲがＣ１４未満のアルキル基の場合には、保形性改善効果が十分に発揮されない。また、ＩＯＢ値が１．２未満の場合、組成物の透明感が悪化する傾向にあり、ＩＯＢ値が１．４を超える場合には凝固点上昇効果が低下し、場合によっては溶け減りの増加となる場合もある。 And when R is an alkyl group less than C14, the shape retention improving effect is not sufficiently exhibited. Further, when the IOB value is less than 1.2, the transparency of the composition tends to deteriorate, and when the IOB value exceeds 1.4, the effect of increasing the freezing point is lowered, and in some cases, the melting is increased. Sometimes it becomes.
また、ＩＯＢ値を１．２から１．４とするため、ＡＯ中にエチレンオキサイド（ＥＯ）は必須となる。プロピレンオキサイド残基、ブチレンオキサイド残基の存在は必須ではないが、ＩＯＢ値が所定範囲に入ればその存在は許容される。 Further, since the IOB value is 1.2 to 1.4, ethylene oxide (EO) is essential in AO. The presence of a propylene oxide residue or a butylene oxide residue is not essential, but its presence is allowed if the IOB value falls within a predetermined range.
具体的なポリオキシアルキレンアルキルエーテルとしては、たとえばＰＯＥ20セチルエーテル、ＰＯＥ30べへニルエーテル、ＰＯＥ20ＰＯＰ8セチルエーテル、ＰＯＥ30ＰＯＰ8デシルテトラデシルエーテルなどが好適に例示される。 Specific examples of the polyoxyalkylene alkyl ether include POE 20 cetyl ether, POE 30 behenyl ether, POE 20 POP 8 cetyl ether, and POE 30 POP 8 decyl tetradecyl ether.
［ヒドロキシアルキルエーテルカルボン酸塩型界面活性剤］
本発明にかかる固形洗浄組成物にはヒドロキシアルキルエーテルカルボン酸塩型界面活性剤を添加することが好適であり、泡立ちの改善が認められる。
本発明において好適なヒドロキシアルキルエーテルカルボン酸塩型界面活性剤は下記構造を有する。
[Hydroxyalkyl ether carboxylate type surfactant]
It is preferable to add a hydroxyalkyl ether carboxylate type surfactant to the solid cleaning composition according to the present invention, and improvement of foaming is recognized.
A hydroxyalkyl ether carboxylate type surfactant suitable in the present invention has the following structure.
（式中、Ｒ１は炭素原子数４〜３４の飽和又は不飽和の炭化水素基を表し；Ｘ１、Ｘ２のいずれか一方は−ＣＨ２ＣＯＯＭ１を表し、他方は水素原子を表し；Ｍ１は水素原子、アルカリ金属類、アルカリ土類金属類、アンモニウム、低級アルカノールアミンカチオン、低級アルキルアミンカチオン、又は塩基性アミノ酸カチオンを表す。） (In the formula, R 1 represents a saturated or unsaturated hydrocarbon group having 4 to 34 carbon atoms; one of X 1 and X 2 represents —CH 2 COOM 1 and the other represents a hydrogen atom; M 1 represents a hydrogen atom, an alkali metal, an alkaline earth metal, ammonium, a lower alkanolamine cation, a lower alkylamine cation, or a basic amino acid cation.)
式中、Ｒ１は芳香族炭化水素、直鎖状又は分岐状脂肪族炭化水素のいずれでもよいが、脂肪族炭化水素、特にアルキル基、アルケニル基が好ましい。例えば、ブチル基、オクチル基、デシル基、ドデシル基、テトラデシル基、ヘキサデシル基、オクタデシル基、ドコシル基、２−エチルヘキシル基、２−ヘキシルデシル基、２−オクチルウンデシル基、２−デシルテトラデシル基、２−ウンデシルヘキサデシル基、デセニル基、ドデセニル基、テトラデセニル基、ヘキサデセニル基等が好ましい例として挙げられ、中でもデシル基、ドデシル基が界面活性能力の面で優れている。 In the formula, R 1 may be an aromatic hydrocarbon, a linear or branched aliphatic hydrocarbon, but is preferably an aliphatic hydrocarbon, particularly an alkyl group or an alkenyl group. For example, butyl, octyl, decyl, dodecyl, tetradecyl, hexadecyl, octadecyl, docosyl, 2-ethylhexyl, 2-hexyldecyl, 2-octylundecyl, 2-decyltetradecyl , 2-undecylhexadecyl group, decenyl group, dodecenyl group, tetradecenyl group, hexadecenyl group and the like are preferable examples, and among them, decyl group and dodecyl group are excellent in terms of surface active ability.
また、式中、Ｘ１、Ｘ２のいずれか一方は−ＣＨ２ＣＯＯＭ１で表されるが、Ｍ１としては、水素原子、リチウム、カリウム、ナトリウム、カルシウム、マグネシウム、アンモニウム、モノエタノールアミン、ジエタノールアミン、トリエタノールアミン等が挙げられる。 In the formula, any one of X 1 and X 2 is represented by —CH 2 COOM 1 , and as M 1 , a hydrogen atom, lithium, potassium, sodium, calcium, magnesium, ammonium, monoethanolamine, Examples include diethanolamine and triethanolamine.
具体的には、上記（Ａ）ヒドロキシアルキルエーテルカルボン酸塩型界面活性剤のうち、ドデカン−１，２−ジオール酢酸エーテルナトリウムが本発明で最も好ましい。
なお、本発明においてヒドロキシアルキルエーテルカルボン酸塩型界面活性剤は、前記Ｎ−アシルアミノ酸塩との組み合わせでは、泡立ちを改善する観点から１〜３０質量％、好ましくは５〜２５質量％配合することができる。
Specifically, among the (A) hydroxyalkyl ether carboxylate type surfactants, sodium dodecane-1,2-diol ether acetate is most preferred in the present invention.
In the present invention, the hydroxyalkyl ether carboxylate type surfactant is used in combination with the N-acyl amino acid salt in an amount of 1 to 30% by mass, preferably 5 to 25% by mass from the viewpoint of improving foaming. Can do.
［キレート剤、尿素類］
また、本発明にかかる洗浄組成物組成物に、キレート剤を添加することが好適である。特に本発明のＮ−アシルアミノ酸に対する対イオンとして用いられるエタノールアミンは、経時で着色を生じることがあり、その防止に有効である。
[Chelating agents, ureas]
Moreover, it is suitable to add a chelating agent to the cleaning composition according to the present invention. In particular, ethanolamine used as a counter ion for the N-acylamino acid of the present invention may be colored over time and is effective in preventing it.
また、本発明において好適に用いられるキレート剤としては、ヒドロキシエタンジホスホン酸及びその塩が挙げられ、さらに好ましくは、ヒドロキシエタンジホスホン酸である。配合量としては、０．００１〜１．０質量％であり、さらに好ましくは０．１〜０．５質量％である。ヒドロキシエタンジホスホン酸及びその塩の配合量が０．００１質量％より少ない場合は、キレート効果が不十分となり、経時で黄変等の不都合を生じ、１．０質量％より多いと皮膚への刺激が強くなり、好ましくない。 Moreover, as a chelating agent used suitably in this invention, hydroxyethane diphosphonic acid and its salt are mentioned, More preferably, it is hydroxyethane diphosphonic acid. As a compounding quantity, it is 0.001-1.0 mass%, More preferably, it is 0.1-0.5 mass%. When the amount of hydroxyethanediphosphonic acid and its salt is less than 0.001% by mass, the chelate effect is insufficient, causing inconveniences such as yellowing over time. The irritation increases, which is undesirable.
同様に、尿素類を併用することが好ましく、本発明で使用される尿素類としては、尿素、チオ尿素等が挙げられる。これらは単独で使用しても２種以上併用してもよい。組成物中の尿素類の含有量は、その種類や併用するイオウ含有水溶性還元剤の種類や量にもよるが、０．１〜３質量％、特に０．５〜２．０質量％が好ましい。この含有量が０．１質量％未満であると、高温で長期間保存した時の褐変の防止効果やイオウ臭の防止効果が不十分となり、逆に、３質量％を超えると、高温で長期間保存した時にアンモニア臭が発生するおそれがあり、好ましくない。 Similarly, ureas are preferably used in combination, and examples of ureas used in the present invention include urea and thiourea. These may be used alone or in combination of two or more. The content of urea in the composition depends on the type and the type and amount of the sulfur-containing water-soluble reducing agent used together, but is 0.1 to 3% by mass, particularly 0.5 to 2.0% by mass. preferable. When this content is less than 0.1% by mass, the effect of preventing browning and the effect of preventing sulfur odor when stored for a long time at high temperature becomes insufficient. An ammonia odor may be generated when stored for a period, which is not preferable.
［カチオン性ポリマー］
さらに本発明によれば、以下のカチオン性ポリマーを添加することにより、溶け崩れ、摩擦溶解度、起泡性について十分な改善効果が得られる。
[Cationic polymer]
Furthermore, according to the present invention, by adding the following cationic polymer, a sufficient improvement effect can be obtained with respect to melting, frictional solubility, and foamability.
カチオン性ポリマー本発明において用いられるカチオン性ポリマーとしては、ポリジメチルジアリルアンモニウムクロライド、ヒドロキシエチルセルローストリメチルアンモニウムクロライド、ヒドロキシエチルセルロースアルキルトリメチルアンモニウムクロライド、ヒドロキシプロピルグァーガムアルキルトリメチルアンモニウムクロライド、ガラクトマンナンアルキルトリメチルアンモニウムクロライド及びアクリル酸β−Ｎ−Ｎ−ジメチル−Ｎ−エチルアンチニオエチル塩ビニルピロリドン共重合物等が挙げられる。 Cationic polymer The cationic polymer used in the present invention includes polydimethyldiallylammonium chloride, hydroxyethylcellulose trimethylammonium chloride, hydroxyethylcellulose alkyltrimethylammonium chloride, hydroxypropyl guar gum alkyltrimethylammonium chloride, galactomannan alkyltrimethylammonium chloride and acrylic acid. β-N-N-dimethyl-N-ethylantinioethyl salt vinylpyrrolidone copolymer and the like can be mentioned.
本発明にかかる固形洗浄組成物にカチオン性ポリマーを配合すると、透明性に優れ、しかも耐溶け崩れ性、摩擦溶解度、低温安定性に優れた透明固形洗浄組成物を提供することができる。配合量はカチオン性ポリマーの種類により異なるが、好ましくは０．１〜１質量％である。 When a cationic polymer is blended with the solid cleaning composition according to the present invention, a transparent solid cleaning composition having excellent transparency and excellent melt resistance, frictional solubility, and low-temperature stability can be provided. The blending amount varies depending on the kind of the cationic polymer, but is preferably 0.1 to 1% by mass.
［イオウ含有水溶性還元剤］
本発明で使用されるイオウ含有水溶性還元剤としては、亜硫酸塩、亜硫酸水素塩、ピロ亜硫酸塩、チオ硫酸塩、ハイドロサルファイト等が挙げられ、これらの中でも、褐変の防止効果がより高く、またそれ自体のイオウ臭の発生量も少ない点から、亜硫酸塩、亜硫酸水素塩、ピロ亜硫酸塩が好ましい。上記の塩の塩基としては、ナトリウム、カリウム等のアルカリ金属類；カルシウム、マグネシウム等のアルカリ土類金属類；エタノールアミン、アミノメチルプロパノール等の有機アミン等が挙げられる。
[Sulfur-containing water-soluble reducing agent]
Examples of the sulfur-containing water-soluble reducing agent used in the present invention include sulfite, bisulfite, pyrosulfite, thiosulfate, hydrosulfite, etc., among these, the browning prevention effect is higher, In addition, sulfites, hydrogen sulfites, and pyrosulfites are preferred because they generate less sulfur odor. Examples of the base of the salt include alkali metals such as sodium and potassium; alkaline earth metals such as calcium and magnesium; organic amines such as ethanolamine and aminomethylpropanol.
組成物中のイオウ含有水溶性還元剤の含有量は、その種類や併用する尿素類の種類や量にもよるが、０．０００１〜０．１質量％、特に０．００５〜０．０５質量％が好ましい。この含有量が０．０００１質量％未満であると、高温で長期間保存した時の褐変の防止効果が不十分となり、逆に、０．１質量％を超えると、高温で長期間保存した時に、イオウ臭の発生量が多くなって、尿素類によるこのイオウ臭の防止効果が不十分となるおそれがあり、好ましくない。 The content of the sulfur-containing water-soluble reducing agent in the composition is 0.0001 to 0.1% by mass, particularly 0.005 to 0.05% by mass, although it depends on the type and the type and amount of ureas used in combination. % Is preferred. If this content is less than 0.0001% by mass, the effect of preventing browning when stored at high temperature for a long time becomes insufficient. Conversely, if it exceeds 0.1% by mass, it is stored at a high temperature for a long time. This is not preferable because the amount of sulfur odor generated increases and the effect of preventing this sulfur odor by ureas may be insufficient.
［その他］
尚、本発明においては以上のＮ−長鎖アシル酸性アミノ酸塩の他、多価アルコール、低級アルコール、その他の成分を配合することができる。
多価アルコール本発明における多価アルコールは、配合量が５質量％ないし30質量％、好ましくは８質量％ないし25質量％配合することができる。
[Others]
In the present invention, in addition to the above N-long chain acyl acidic amino acid salt, a polyhydric alcohol, a lower alcohol, and other components can be blended.
Polyhydric alcohol The polyhydric alcohol in the present invention can be blended in an amount of 5 to 30% by mass, preferably 8 to 25% by mass.
多価アルコールとしては、グリセリン、プロピレングリコール、ソルビット、エチレングリコール、及びジグリセリン等が挙げられる。
配合量が５質量％以下ではＮ−長鎖アシル酸性アミノ酸塩が結晶化してしまう場合があり、30質量％以上では溶液状となる。
Examples of the polyhydric alcohol include glycerin, propylene glycol, sorbit, ethylene glycol, and diglycerin.
If the blending amount is 5% by mass or less, the N-long chain acyl acidic amino acid salt may crystallize, and if it is 30% by mass or more, it becomes a solution.
低級アルコール本発明における低級アルコールは、多価アルコールと低級アルコールの配合重量比は10:1ないしは1:5、好ましくは5:1ないしは1:2配合することができる。
多価アルコールと低級アルコールの配合重量比（多価アルコール／低級アルコール）が10/1以上の場合、加熱溶解時に増粘し製造が不可能となり、1/5以下の場合、乾燥期間に時間を要したり、透明性が良好でなかったりする。
Lower alcohol The lower alcohol in the present invention can be blended in a blending weight ratio of polyhydric alcohol and lower alcohol of 10: 1 to 1: 5, preferably 5: 1 to 1: 2.
If the blended weight ratio of polyhydric alcohol and lower alcohol (polyhydric alcohol / lower alcohol) is 10/1 or higher, the viscosity will increase during heating and dissolution, making it impossible to manufacture. Or the transparency is not good.
低級アルコールとしては、エチルアルコール、プロピルアルコール等が挙げられる。
本発明の透明固形洗浄組成物には以上の成分の他、洗浄組成物に通常配合される公知の配合成分を配合することができる。
Examples of the lower alcohol include ethyl alcohol and propyl alcohol.
In addition to the above components, the transparent solid cleaning composition of the present invention may contain known blending components that are usually blended in the cleaning composition.
例えば、本発明の透明性を損わない量のアニオン界面活性剤、カチオン界面活性剤、両性界面活性剤、非イオン界面活性剤、殺菌剤、保湿剤、油分、香料、色素、キレート剤、紫外線吸収剤、酸化防止剤、生薬、非イオン性、カチオン性或いはアニオン性の水溶性高分子等を配合することができる。 For example, anionic surfactants, cationic surfactants, amphoteric surfactants, nonionic surfactants, bactericides, humectants, oils, fragrances, dyes, chelating agents, ultraviolet rays in an amount that does not impair the transparency of the present invention Absorbers, antioxidants, herbal medicines, nonionic, cationic or anionic water-soluble polymers can be blended.
さらに、起泡性を向上させる目的で、本発明の透明固形洗浄組成物の効果を損わない範囲で、例えばポリオキシエチレンアルキル硫酸エステル塩、Ｎ−アシルサルコシン塩、Ｎ−アシル−Ｎ−メチルタウリン塩、リン酸エステル塩、スルホコハク酸塩、α−オレフィンスルホン酸塩、高級脂肪酸エステルスルホン酸塩、脂肪酸石鹸等のアニオン界面活性剤、アルカノールアミド、ポリオキシエチレンオキシドポリプロピレンオキシドブロックポリマー等のノニオン界面活性剤を配合することができる。さらに、その添加剤としては、ピロリドンカルボン酸、ピロリドンカルボン酸ナトリウム、ヒアルロン酸、ポリオキシエチレンアルキルグルコシドエーテル等の保湿剤、レシチン、サポニン、アロエ、オオバク、カミツレ等の天然抽出物等が挙げられる。特に使用性（しっとりさ）に特徴を有する乳酸エステルは、一般の石けんではPHがアルカリ性の為、分解等により配合することはできなかったが、本発明においては安定性良く配合することが可能である。 Furthermore, for the purpose of improving the foaming property, for example, polyoxyethylene alkylsulfuric acid ester salt, N-acyl sarcosine salt, N-acyl-N-methyl, as long as the effect of the transparent solid cleaning composition of the present invention is not impaired. Nonionic surfactants such as taurine salts, phosphate ester salts, sulfosuccinates, α-olefin sulfonates, higher fatty acid ester sulfonates, fatty acid soaps, anionic surfactants, alkanolamides, polyoxyethylene oxide polypropylene oxide block polymers, etc. An agent can be blended. In addition, examples of the additive include humectants such as pyrrolidone carboxylic acid, sodium pyrrolidone carboxylate, hyaluronic acid, polyoxyethylene alkyl glucoside ether, and natural extracts such as lecithin, saponin, aloe, oat, chamomile and the like. Lactic acid esters, which are particularly characterized by usability (moistness), cannot be blended due to decomposition, etc., because PH is alkaline in general soap, but in the present invention it can be blended with good stability. is there.
本発明の洗浄組成物は、枠練り法によって製造される。すなわち、炭素数10ないし22のアシル基を有する中和度1.5〜1.8当量のＮ−長鎖アシル酸性アミノ酸塩と多価アルコールと低級アルコール及び必要に応じて他の界面活性剤、その他の添加剤に水を加えた混合物を70〜80℃に加熱し、均一に溶解した後、型に注入して冷却固化させる。その後乾燥熟成を行ない本発明の洗浄組成物を得る。
乾燥期間は多価アルコールと低級アルコールの配合量により異なるが、２〜40日程度で十分である。
The cleaning composition of the present invention is produced by a frame kneading method. Namely, an N-long chain acyl acidic amino acid salt having an acyl group having 10 to 22 carbon atoms and a neutralization degree of 1.5 to 1.8 equivalents, a polyhydric alcohol and a lower alcohol, and other surfactants and other additives as required The mixture in which water is added is heated to 70 to 80 ° C. and uniformly dissolved, and then poured into a mold and cooled and solidified. Thereafter, drying and aging are performed to obtain the cleaning composition of the present invention.
The drying period varies depending on the blending amount of the polyhydric alcohol and the lower alcohol, but about 2 to 40 days is sufficient.
以上説明したように本発明にかかる透明固形洗浄組成物によれば、Ｎ−長鎖アシル酸性アミノ酸の対イオンとして、アルカリ金属、エタノールアミン及びタウリンを用いることにより、キシミ感の抑制及び浸透感の向上といった使用感の改善を図ることが可能となった。 As described above, according to the transparent solid cleaning composition of the present invention, by using an alkali metal, ethanolamine and taurine as counter ions of N-long chain acyl acidic amino acid, it is possible to suppress the squeaky feeling and the penetration feeling. It has become possible to improve the feeling of use such as improvement.
以下、本発明の好適な実施形態について説明する。
本発明者らはＮ−長鎖アシル酸性アミノ酸の対イオンと使用感の関係を検討するため、次のような基本処方を用いて検討を行った。なお、配合量は質量％で示し、また対イオン組成はモル比で示す。
Hereinafter, preferred embodiments of the present invention will be described.
In order to examine the relationship between the counter ion of N-long chain acyl acidic amino acid and the feeling of use, the present inventors have studied using the following basic formulation. In addition, a compounding quantity is shown by the mass%, and a counter ion composition is shown by molar ratio.
［表１］（仕込み時処方）
Ｎ−ヤシ油脂肪酸アシルグルタミン酸 ２２．１％
Ｎ−ステアロイル−Ｌ−グルタミン酸 ７．３７％
対イオン 各当量
ドデカン−１，２−ジオール酢酸エーテルナトリウム １０．０
カチオン化セルロース ０．３
ヒドロキシエタンジホスホン酸 ０．１
尿素 ２．０
エタノール １０．０
濃グリセリン １４．０
エデト酸２ナトリウム ２．５
精製水 残余
[Table 1] (Prescription at preparation)
N-coconut oil fatty acid acyl glutamic acid 22.1%
N-stearoyl-L-glutamic acid 7.37%
Counter ion each equivalent dodecane-1,2-diol sodium acetate ether 10.0
Cationized cellulose 0.3
Hydroxyethane diphosphonic acid 0.1
Urea 2.0
Ethanol 10.0
Concentrated glycerin 14.0
Edetic acid disodium 2.5
Purified water residue
まず、本発明者らは各種界面活性剤を添加し、凝固点と外観に与える影響について検討を行った。なお、この際、中和度は２．０とした。結果を次の表２に示す。 First, the present inventors added various surfactants and examined the influence on the freezing point and appearance. At this time, the degree of neutralization was 2.0. The results are shown in Table 2 below.
なお、摩擦溶解度に関しては、ＪＩＳＫ−３３０４に準じて測定した。すなわち、４０℃に調整した水道水で濡らしたフィルム面上に一定重量の試料片（断面１５ｍｍ×２０ｍｍ）を載せ、このフィルムを回転し１０分間摩擦溶解させる。摩擦溶解前後の重量より、次式により一定面積当たりの摩擦溶解度を求めた。
摩擦溶解度（％）＝（前重量−後重量）×１００／３
また、硬度は、レオメーター（不動工業社製）にて石鹸表面より深度１０ｍｍまで針を圧入した際の最大応力にて示した。
The friction solubility was measured according to JISK-3304. That is, a sample piece (cross section 15 mm × 20 mm) having a constant weight is placed on a film surface wetted with tap water adjusted to 40 ° C., and this film is rotated and frictionally dissolved for 10 minutes. From the weight before and after the friction dissolution, the friction solubility per fixed area was determined by the following formula.
Friction solubility (%) = (previous weight−rear weight) × 100/3
The hardness was shown by the maximum stress when the needle was pressed into the depth of 10 mm from the soap surface with a rheometer (manufactured by Fudo Kogyo Co., Ltd.).
前記表２より明らかなように、ＩＯＢが１．１０〜１．４５の各種界面活性剤を添加し、凝固点を測定した。その結果、ＩＯＢ＝１．３８のＰＯＥ２０セチルエーテルは外観を悪化させず、しかも硬度を上昇させることなく摩擦溶解度を低下させることができた。一方、ＩＯＢ＝１．１０のＰＯＥ１０セチルーテルでは切断時外観に曇りが生じ、また、ＰＥＧ１１メチルエーテルジメチコンではむしろ凝固点が低下し、しかも切断時外観にうろこ状の曇りを生じた。
したがって、添加される非イオン性界面活性剤の種類により凝固点が変化することが明らかとなった。
As apparent from Table 2, various surfactants having an IOB of 1.10 to 1.45 were added, and the freezing point was measured. As a result, POE20 cetyl ether with IOB = 1.38 could reduce the friction solubility without deteriorating the appearance and without increasing the hardness. On the other hand, POE10 cetyltel with IOB = 1.10 had a cloudy appearance upon cutting, and PEG11 methyl ether dimethicone had a rather low freezing point and a scale-like cloudiness on cutting.
Therefore, it became clear that a freezing point changes with kinds of nonionic surfactant added.
そこで本発明者らはポリオキシアルキレンアルキルエーテル型界面活性剤を中心として、外観を悪化させることなく凝固点を上昇させることのできる界面活性剤について検討を行った。
結果を次の表３に示す。
Accordingly, the present inventors have investigated a surfactant capable of raising the freezing point without deteriorating the appearance, centering on a polyoxyalkylene alkyl ether type surfactant.
The results are shown in Table 3 below.
表３より明らかなように、ＰＯＥ３０べへニルエーテル、ＰＯＥ20ＰＯＥ8セチルエーテル、ＰＯＥ20ＰＯＰ6デシルテトラデシルエーテル各１質量％配合では、いずれも良好な摩擦溶解度低下効果を示した。
次に本発明者らは、ポリオキシアルキレンアルキルエーテルの各配合量について検討を行った。結果を表４〜表６に示す。
As is apparent from Table 3, the blending of 1% by mass of POE30 behenyl ether, POE20 POE8 cetyl ether, and POE20POP6 decyltetradecyl ether each showed a good friction solubility lowering effect.
Next, the present inventors examined each compounding quantity of polyoxyalkylene alkyl ether. The results are shown in Tables 4-6.
［表４］
試験例 ３−１ ３−２ ３−３
トリエタノールアミン ５０ ５０ ５０
カリウム（ＫＯＨ） ５０ ５０ ５０
中和度 ２．０ ２．０ ２．０
POE20セチルエーテル ０．５ １．０ ２．０
凝固点（℃） ６４．６ ６４．６ ６３．５
切断時外観 ○ ○ ○
ｐＨ（１％） ６．８３ ６．８６ ６．８３
摩擦溶解度 ７４．５ ７６．２ ７２．２
硬度（押し） ３４３ ３４０ ３３７
４週間後外観 ○ ○ ○
[Table 4]
Test Example 3-1 3-2 3-3
Triethanolamine 50 50 50
Potassium (KOH) 50 50 50
Degree of neutralization 2.0 2.0 2.0
POE20 cetyl ether 0.5 1.0 2.0
Freezing point (° C) 64.6 64.6 63.5
Appearance when cutting ○ ○ ○
pH (1%) 6.83 6.86 6.83
Friction solubility 74.5 76.2 72.2
Hardness (push) 343 340 337
Appearance after 4 weeks ○ ○ ○
［表５］
試験例 ４−１ ４−２ ４−３ ４−４
トリエタノールアミン ５０ ５０ ５０ ５０
カリウム（ＫＯＨ） ５０ ５０ ５０ ５０
中和度 ２．０ ２．０ ２．０ ２．０
POE30べへニルエーテル ０．５ １．０ ２．０ ４．０
凝固点（℃） ６６．１ ６４．９ ６５．３ ６５．０
切断時外観 ○ ○ ○ ○
ｐＨ（１％） ６．８６ ６．８９ ６．８３ ６．８２
摩擦溶解度 ７５．２ ７５．０ ７１．９ ６９．３
硬度（押し） ３４７ ３３３ ３８０ ２３３
４週間後外観 ○ ○ ○ △
[Table 5]
Test example 4-1 4-2 4-3 4-4
Triethanolamine 50 50 50 50
Potassium (KOH) 50 50 50 50
Degree of neutralization 2.0 2.0 2.0 2.0
POE30 behenyl ether 0.5 1.0 2.0 4.0
Freezing point (° C) 66.1 64.9 65.3 65.0
Appearance when cutting ○ ○ ○ ○
pH (1%) 6.86 6.89 6.83 6.82
Friction solubility 75.2 75.0 71.9 69.3
Hardness (push) 347 333 380 233
Appearance after 4 weeks ○ ○ ○ △
上記表４〜６より明らかなように、ポリオキシアルキレンアルキルエーテルの配合量は４質量％となると外観あるいは泡立ち性が悪化する場合があり、好ましくは０．５〜３．０％、特に好ましくは１．０〜２．０％である。
さらに本発明者らは中和度、対イオン比を変えて検討した。結果を次の表６に示す。
As apparent from Tables 4 to 6 above, when the blending amount of the polyoxyalkylene alkyl ether is 4% by mass, the appearance or foaming property may be deteriorated, preferably 0.5 to 3.0%, particularly preferably. 1.0 to 2.0%.
Furthermore, the present inventors examined by changing the neutralization degree and the counter ion ratio. The results are shown in Table 6 below.
［表６］
試験例 ５−１ ５−２ ５−３ ５−４
トリエタノールアミン ５０ ５０ ４０ ６０
カリウム（ＫＯＨ） ５０ ５０ ６０ ４０
中和度 １．６ １．８ １．８ １．８
POE20セチルエーテル ２．０ ２．０ ２．０ ２．０
凝固点（℃） ６４．６ ６５．２ ６４．９ ６２．３
切断時外観 ○ ○ ○ ○
ｐＨ（１％） ６．８３ ６．８６ ６．８９ ６．８１
摩擦溶解度 ７４．５ ７６．２ ７１．４ ７６．１
硬度（押し） ３４３ ３４０ ３３７ ３０１
４週間後外観 △ ○ ○ ○
[Table 6]
Test Example 5-1 5-2 5-3 5-4
Triethanolamine 50 50 40 60
Potassium (KOH) 50 50 60 40
Degree of neutralization 1.6 1.8 1.8 1.8
POE20 cetyl ether 2.0 2.0 2.0 2.0
Freezing point (° C) 64.6 65.2 64.9 62.3
Appearance when cutting ○ ○ ○ ○
pH (1%) 6.83 6.86 6.89 6.81
Friction solubility 74.5 76.2 71.4 76.1
Hardness (push) 343 340 337 301
Appearance after 4 weeks △ ○ ○ ○
以上の通り、中和度を１．６にすることにより、４週間後に若干の曇りが生じたが、対イオン比の変更、あるいは中和度の変更によっても、摩擦溶解度低減の基本的な効果は維持された。
As described above, by setting the neutralization degree to 1.6, a slight clouding occurred after 4 weeks. However, the basic effect of reducing frictional solubility can be achieved by changing the counterion ratio or changing the neutralization degree. Was maintained.
Claims (6)
ポリオキシアルキレンアルキルエーテル Ｒ−（ＡＯ）ｎＨ
（ここで、ＲはＣ１４〜Ｃ３６の直鎖または分岐の炭化水素基、ＡＯはエチレンオキサイド基、プロピレンオキサイド基、ブチレンオキサイド基から選択される残基であって、ｎは１５〜５０、かつＩＯＢ値が１．２〜１．４である）を０．５〜３質量％含み、
また、前記Ｎ−アシルアミノ酸に対する対イオンは、エタノールアミンからなる対イオン４０〜６０％と、カリウムイオンならなる対イオン４０〜６０％と、を含み、
前記Ｎ−アシルアミノ酸の対イオンによる中和度は、１．６〜２．０であることを特徴とする固形洗浄組成物。 A transparent detergent composition containing 35 mass% to 80 mass% of N-acylamino acid salt ,
Polyoxyalkylene alkyl ether R- (AO) nH
Wherein R is a C14 to C36 linear or branched hydrocarbon group, AO is a residue selected from an ethylene oxide group, a propylene oxide group, and a butylene oxide group, n is 15 to 50, and IOB 0.5 to 3% by mass)
The counter ion for the N-acylamino acid contains 40 to 60% counter ion composed of ethanolamine and 40 to 60% counter ion composed of potassium ion,
The degree of neutralization of the N-acylamino acid with a counter ion is 1.6 to 2.0.
The composition according to claim 1, comprising a sulfite.
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