JP4061420B2 - Liquid detergent composition - Google Patents

Liquid detergent composition Download PDF

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Publication number
JP4061420B2
JP4061420B2 JP18872398A JP18872398A JP4061420B2 JP 4061420 B2 JP4061420 B2 JP 4061420B2 JP 18872398 A JP18872398 A JP 18872398A JP 18872398 A JP18872398 A JP 18872398A JP 4061420 B2 JP4061420 B2 JP 4061420B2
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Prior art keywords
acid
liquid detergent
surfactant
detergent composition
diacetic acid
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JP2000017298A (en
Inventor
信 斉藤
徹 山本
信義 南部
正法 古川
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Showa Denko KK
Chelest Corp
Chubu Chelest Co Ltd
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Showa Denko KK
Chelest Corp
Chubu Chelest Co Ltd
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Priority to JP18872398A priority Critical patent/JP4061420B2/en
Priority to EP99112847A priority patent/EP0969080B1/en
Priority to AT99112847T priority patent/ATE280820T1/en
Priority to DE69921394T priority patent/DE69921394T2/en
Priority to US09/347,451 priority patent/US6194373B1/en
Publication of JP2000017298A publication Critical patent/JP2000017298A/en
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    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/02Anionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D1/00Detergent compositions based essentially on surface-active compounds; Use of these compounds as a detergent
    • C11D1/66Non-ionic compounds
    • C11D1/83Mixtures of non-ionic with anionic compounds
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/20Organic compounds containing oxygen
    • C11D3/2003Alcohols; Phenols
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/16Organic compounds
    • C11D3/26Organic compounds containing nitrogen
    • C11D3/33Amino carboxylic acids
    • CCHEMISTRY; METALLURGY
    • C11ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
    • C11DDETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
    • C11D3/00Other compounding ingredients of detergent compositions covered in group C11D1/00
    • C11D3/43Solvents

Abstract

A high-concentration liquid detergent composition, which does not have strong alkalinity, which has excellent compatibility even if the surfactant concentration is increased, and which is free of white turbidity, comprising (A) one or more surfactants selected from a nonionic surfactant and an anionic surfactant, (B) one or more builders selected from an amine salt and an alkali metal-amine mixed salt of aminopolycarboxylic acid chelating agent, and (C) one or more solubilizing agents selected from alcohols, with component (A) being present in a concentration of 20 wt% or more.

Description

【0001】
【発明の属する技術分野】
本発明は、界面活性剤およびアミノポリカルボン酸系の有機ビルダーを含む液体洗剤組成物に関し、特に界面活性剤との相溶性に優れ、白濁防止性および生分解性に優れた高濃度液体洗剤組成物に関する。
【0002】
【従来の技術】
液体洗剤、特に家庭用の洗剤として用いられる液体洗剤においては、界面活性剤としてノニオン性界面活性剤または/およびアニオン性界面活性剤が使われており、洗浄性を高めるために各種のビルダーが添加される。このビルダーは有機性あるいは無機性のものなど多種にわたるが、いずれもほとんどがNa塩の構造を有している。
【0003】
近年環境保護の観点から、生分解性に優れたアミノポリカルボン酸、特にアミノ酸二酢酸型のキレート剤をビルダーとして使用するための研究が盛んに行われている。このアミノポリカルボン酸、特にアミノ酸二酢酸型のキレート剤も、コストの面から合成反応液をそのまま使うため、ほとんどがNa塩で強アルカリ性を呈する。例えば特開平10−25494号にはアスパラギン酸二酢酸をビルダーとした食器用液体洗剤について提案されているが、アルカリ金属塩が使用されている。また特開平10−36888号でもアミノポリカルボン酸をビルダーとした液体洗剤について提案されていて、アミン塩も示されているが、アルカリ金属塩と同列に扱われており、実施例もNa塩である。そして組成物中の界面活性剤の最高濃度が10重量%と低く、高濃度側での白濁の問題は改善されていない。
【0004】
ビルダーの使用による問題点は、主剤の界面活性剤の溶解度あるいは曇点を低下させ、これにより白濁を生じたり、時間とともに白濁が二層分離したりするなど、相溶性が悪化することである。これを防止するためには、液体洗剤組成物を水で希釈して界面活性剤の濃度を下げるか、あるいは可溶化剤を添加することなどが従来より実施されている。しかし、前者の水による希釈は洗剤の運送費の増大を余儀なくし、商業的に不利である。また後者も新たな可溶化剤として界面活性剤を添加したり、あるいは尿素類、エーテルアルコール類、低級アルコール類等を添加することが知られているが、高濃度の液体洗剤組成物を得るためには十分満足できるとはいえない。
【0005】
【発明が解決しようとする課題】
本発明の課題は、生分解性に優れ、強アルカリ性を呈することがないとともに、界面活性剤濃度を高くしても相溶性に優れ、白濁することのない液体洗剤組成物を得ることである。
【0006】
【課題を解決するための手段】
本発明者等は上記課題を解決するため鋭意検討した結果、液体洗剤の主界面活性剤にノニオン性界面活性剤または/およびアニオン性界面活性剤を高濃度で用い、ビルダーにアミノポリカルボン酸系キレート剤を用いる場合、ビルダーの対イオンとしてアルカリ金属−アミン混合塩を用いるとともに、これにグリコール類を添加することにより相溶性を高め、白濁の防止を可能とすることを見出し、本発明を完成するに至った。
【0007】
すなわち本発明は次の液体洗剤組成物である。
(1) (A):ノニオン性界面活性剤およびアニオン性界面活性剤から選ばれる1種以上の界面活性剤20〜60重量%
(B):アミノポリカルボン酸系キレート剤のアルカリ金属−アミン混合塩から選ばれる1種以上のビルダー0.1〜15重量%、
(C):グリコール類から選ばれる1種以上の可溶化剤0.5〜30重量%、ならびに
(D):水 残部を含み、
(B)成分のビルダーは(A)成分の界面活性剤に対し5〜15重量%、
(C)成分の可溶化剤は(A)成分の界面活性剤に対して5〜40重量%である液体洗剤組成物。
(2) アミノポリカルボン酸がアミノ酸−N,N−二酢酸である上記(1)記載の液体洗剤組成物。
(3) アミノポリカルボン酸がグルタミン酸−N,N−二酢酸、α−アラニン−N,N−二酢酸、β−アラニン−N,N−二酢酸、アスパラギン酸−N,N−二酢酸、グリシン−N,N−二酢酸、またはセリン−N,N−二酢酸である上記(1)記載の液体洗剤組成物。
【0008】
本発明で(A)成分として用いる界面活性剤はノニオン性界面活性剤およびアニオン性界面活性剤から選ばれる1種以上のものである。この中ではノニオン性界面活性剤の方がアニオン性界面活性剤よりも溶解度が高いので、高濃度液体洗剤組成物を調製するのに適している。
【0009】
ノニオン性界面活性剤としては、ポリオキシエチレンアルキルエーテル、ポリオキシエチレンアルキルフェニルエーテル、脂肪酸ジエタノールアミド、アミンオキサイド、アミドアミンオキサイド等があげられる。アニオン性界面活性剤としては、硫酸アルキル塩、硫酸アルキルポリオキシエチレン塩、アルキルベンゼンスルホン酸塩、α−オレフィンスルホン酸塩、脂肪酸塩、エーテルカルボン酸塩、モノアルキルリン酸塩等があげられる。これらは市販品を使用することができる。
【0010】
本発明で(B)成分のビルダーに用いられるアミノポリカルボン酸系キレート剤は1個以上、好ましくは1〜2個のアミノ基、および2個以上、好ましくは3〜4個のカルボキシル基を有し、かつキレート作用を有するキレート剤である。上記のアミノ基は2級アミノ基であっても、3級アミノ基であってもよい。このようなキレート剤としてはアミノ酸−N,N−二酢酸が好ましい。
【0011】
アミノ酸−N,N−二酢酸は次の式(1)で示される化合物である。
A−N−(CH2COOH)2 ・・・(1)
(ただしA−Nはアミノ酸を示し、−Nはアミノ酸中のアミノ基を示す。)
このようなアミノ酸−N,N−二酢酸としては、グルタミン酸−N,N−二酢酸、α−アラニン−N,N−二酢酸、β−アラニン−N,N−二酢酸、アスパラギン酸−N,N−二酢酸、グリシン−N,N−二酢酸、セリン−N,N−二酢酸などがあげられる。これらのアミノ酸−N,N−二酢酸は、例えばアミノ酸を原料として公知のストレッカー反応やモノクロロ酢酸により合成される。
【0012】
またアミノ酸−N,N−二酢酸以外のアミノポリカルボン酸系キレート剤として、エチレンジアミンジコハク酸、イミノジコハク酸などもあげられ、これらも公知の方法から合成され使用できる。これらの好ましいアミノポリカルボン酸系キレート剤の例を以下に構造式で示す。
【0013】
【化1】

Figure 0004061420
【0014】
合成されたアミノ酸−N,N−二酢酸その他のアミノポリカルボン酸系キレート剤は、コストの面から一般的には全てのカルボキシル基の対イオンがNa塩となっている水溶液として得られるが、本発明ではアミノポリカルボン酸をアルカリ金属−アミン混合塩の形で(B)成分のビルダーとして使用する。使用するアミン塩は1級〜3級アミン塩のいずれでも効果を示すが、アルカノールアミン塩が望ましく、特にトリエタノールアミン塩、ジエタノールアミン塩が好ましい。アルカリ金属−アミン混合塩のアルカリ金属塩としては、K塩がNa塩に比べて界面活性剤との相溶性が高いため好ましいが、コスト的にはNa塩の方が好ましい。
【0015】
Na塩で得られたアミノポリカルボン酸系キレート剤をアルカリ金属−アミン混合塩にするためには、得られたNa塩の水溶液をH型カチオン交換樹脂で脱Naするか、電気透析により脱Naするか、あるいは酸析により全てのカルボキシル基がH型になっている結晶を取得するかして、溶液の場合はそのままの溶液中に、また結晶の場合は結晶を水に溶解して、この溶液中にアミンあるいは水酸化カリウム、水酸化ナトリウム等のアルカリ金属水酸化物−アミン混合物と混合することにより、目的とする塩の水溶液を得ることができる。また、脱Naしたものを液体洗剤処方時に添加し、そこで更にアミンあるいは他のアルカリ金属水酸化物を添加して目的とする塩を得てもよい。
【0016】
アミノポリカルボン酸系キレート剤、特にアミノ酸二酢酸型のキレート剤は中性から弱アルカリ側のpH8〜12で良好なキレート効果、すなわちビルダー効果を発揮することが知られているので、そのpH域になるようにアミンあるいはアルカリ金属水酸化物の添加量を調整することが望ましい。アルカリ金属とアミン塩の混合塩の場合の比率は、アミン塩の量が多ければ多いほど界面活性剤との相溶性が向上するが、脱Naのコスト、アミンのコスト等を考慮してその比を決定する必要がある。
【0017】
本発明で可溶化剤として用いられるグリコール類は制限はないが、炭素数1〜5、好ましくは2〜4のグリコールが好ましい。このようなグリコール類としては、一般的なエタノール、イソプロピルアルコール等のアルコール揮発性で引火性が強いため、プロピレングリコールあるいはエチレングリコールの一般的で安価なグリコール類が好ましい。前述のアルカノールアミン類をアルコールとして更に添加することも可能であるが、アミン類の過剰の添加は特に非イオン性界面活性剤が主剤の液体洗剤では粘度を増加させ使い勝手を損なうため、量の加減が必要である。
【0018】
本発明の液体洗剤組成物では、(A)成分の界面活性剤が20〜60重量%、好ましくは30〜50重量%、(B)成分のビルダーが0.1〜15重量%、好ましくは1〜10重量%、(C)成分の可溶化剤が0.5〜30重量%、好ましくは1〜20重量%、残部を(D)成分の水とする。ここでの配合割合は(A)〜(D)成分の4成分の割合である。(B)成分のビルダーは(A)成分の界面活性剤に対し5〜15重量%、(C)成分の可溶化剤は(A)成分の界面活性剤に対して5〜40重量%、好ましくは10〜30重量%とする。
【0019】
(A)成分の界面活性剤が上記範囲より低い場合は液体洗剤の運送費増、パッケージの増大等商業的に不利であり、高い場合は目的の相溶性の幅が狭まり処方上の柔軟性が低下したり、粘度が上昇して使用い勝手を損うため好ましくない。
(B)成分のビルダーが上記範囲より低い場合は液体洗剤としての洗浄効果が低くなり、高い場合は界面活性剤との相溶性の幅が狭まり、処方上の柔軟性が低下するため好ましくない。
(C)成分の可溶化剤が上記範囲より低い場合は(A)、(B)成分の相溶性が低下し、高い場合は処方上の柔軟性が低下するため好ましくない。
【0020】
本発明の液体洗剤組成物は、必要により粘度調整剤、保湿剤、防腐剤、防かび剤、色素、香料等の他の添加剤を任意の割合で配合することができる。
【0021】
本発明の液体洗剤組成物は洗浄剤としてのすべての用途に使用できるが、特に家庭用洗剤として衣料用、ハウスホールド用等の洗浄の用途に使用するのに適している。
使用に際してはそのまま使用することもできるが、高濃度であるため水で希釈して使用することもできる。
【0022】
【発明の効果】
本発明によれば、特定の界面活性剤にアミノポリカルボン酸のアミン−アルカリ金属混合塩からなるビルダーとグリコール類からなる可溶化剤を特定割合で配合したので、強アルカリ性を呈することがないとともに、界面活性剤濃度を高くしても相溶性に優れ、白濁することがない高濃度液体洗剤組成物を得ることができる。
【0023】
【発明の実施の形態】
以下、本発明の実施例について説明する。各例中、%は重量%である。
実施例1〜1、比較例1〜18
下記の界面活性剤、ビルダーおよびアルコール類からなる可溶化剤を表1〜2に示す配合割合で添加し、水でバランスさせた。そして十分な混合を行い、常温および40℃に放置したときの相溶性を目視にて観察した。なお、放置して二層分離したものは観察時、再度混合してからその溶状を観察した。表1〜2に処方および観察結果をまとめた。
【0024】
使用した化合物は次の通りである。
界面活性剤:
非イオン性界面活性剤;花王製エマルゲン108(商標、エチレンオキシドアルキルエーテルタイプ)
アニオン性界面活性剤;LAS;試薬直鎖アルキルベンゼンスルホン酸ソーダ(硫酸ソーダ含有なし)
ビルダー:
GLDA;グルタミン酸二酢酸
αAD;α−アラニン二酢酸
βAD;β−アラニン二酢酸
SDA;セリン二酢酸
ASDA;アスパラギン酸二酢酸
NTA;グリシン二酢酸
EDDS;エチレンジアミンジコハク酸
IDS;イミノジコハク酸
アミン:
TEA;トリエタノールアミン
DEA;ジエタノールアミン
MEA;モノエタノールアミン
可溶化剤:
PG;プロピレングリコール
IPA;イソプロピルアルコール
【0025】
表1〜2中、GLDAの後の−2Na2TEAは分子内のカルボキシル基の対イオンを表しており、2Naと2TEAの混合塩を意味する。−2Na2Hは2Na塩でpH的にも低い状態であることを意味する。いずれの場合も濃度は全てのカルボキシル基がNa塩であるときの換算値で表している。
【0026】
【表1】
Figure 0004061420
【0027】
【表2】
Figure 0004061420
【0028】
表1〜2の結果より、実施例1と比較例3、4、7、8、10とを対比すると、ビルダーがアミン塩かアルカリ金属−アミン混合塩であって、可溶化剤がアルコールの組成物は相溶性を有するが、ビルダーがNa塩であったり、可溶化剤がないかあるいはアルカノールアミンの場合は相溶性が悪く白濁していることがわかる。
【0029】
同様のことは実施例3と比較例11、実施例7と比較例6、実施例9と比較例12、実施例10と比較例13、実施例11と比較例14、実施例15と比較例17、実施例16と比較例18の対比においても当てはまる。
【0030】
以上の結果、高濃度のノニオン性またはアニオン性界面活性剤に対してビルダーとしてアミノポリカルボン酸のアミン塩またはアルカリ金属−アミン混合塩、ならびに可溶化剤としてアルコール類を特定量配合することにより、相溶性に優れ、白濁のない高濃度液体洗剤組成物が得られることがわかる。[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a liquid detergent composition containing a surfactant and an aminopolycarboxylic acid-based organic builder, and in particular, a high concentration liquid detergent composition having excellent compatibility with a surfactant, and excellent anti-white turbidity and biodegradability. Related to things.
[0002]
[Prior art]
In liquid detergents, especially liquid detergents used as household detergents, nonionic surfactants and / or anionic surfactants are used as surfactants, and various builders are added to improve detergency. Is done. This builder has a variety of organic and inorganic types, but most of them have a Na salt structure.
[0003]
In recent years, from the viewpoint of environmental protection, studies have been actively conducted to use aminopolycarboxylic acids excellent in biodegradability, particularly amino acid diacetic acid type chelating agents as builders. Since this aminopolycarboxylic acid, particularly an amino acid diacetate type chelating agent, uses a synthetic reaction solution as it is from the viewpoint of cost, most of them are Na salts and exhibit strong alkalinity. For example, Japanese Patent Laid-Open No. 10-25494 proposes a liquid detergent for dishes using aspartic acid diacetic acid as a builder, but an alkali metal salt is used. Japanese Patent Laid-Open No. 10-36888 proposes a liquid detergent using aminopolycarboxylic acid as a builder, and an amine salt is also shown, but it is treated in the same manner as an alkali metal salt, and the examples are also Na salts. is there. The maximum concentration of the surfactant in the composition is as low as 10% by weight, and the problem of white turbidity on the high concentration side is not improved.
[0004]
The problem with the use of the builder is that the solubility of the main surfactant or the clouding point is lowered, thereby causing white turbidity, and the white turbidity is separated into two layers with time. In order to prevent this, the liquid detergent composition has been conventionally diluted with water to lower the concentration of the surfactant, or a solubilizer is added. However, the former dilution with water necessitates an increase in the cost of transporting the detergent, which is commercially disadvantageous. In addition, the latter is also known to add a surfactant as a new solubilizer, or to add ureas, ether alcohols, lower alcohols, etc. In order to obtain a high concentration liquid detergent composition Is not enough.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to obtain a liquid detergent composition that is excellent in biodegradability, does not exhibit strong alkalinity, has excellent compatibility even when the surfactant concentration is increased, and does not become cloudy.
[0006]
[Means for Solving the Problems]
As a result of intensive studies to solve the above problems, the present inventors have used a nonionic surfactant or / and an anionic surfactant at a high concentration as the main surfactant of a liquid detergent, and an aminopolycarboxylic acid type builder as a builder. when using a chelating agent, a alkali metal as a counterion of the builder - with an amine mixed salt, this enhances the compatibility by adding glycol compounds, found that that is capable of preventing white turbidity, the The invention has been completed.
[0007]
That is, the present invention is the following liquid detergent composition.
(1) (A): 20 to 60% by weight of one or more surfactants selected from nonionic surfactants and anionic surfactants,
(B): A alkali metal amino polycarboxylic acid chelating agent - one or more builders 0.1-15 wt% selected from amine mixed salt,
(C): 1 or more solubilizing agents selected from glycol ethers 0.5-30 wt%, and
(D): including water balance
The builder of the component (B) is 5 to 15% by weight based on the surfactant of the component (A).
(C) a solubilizing agent component liquid detergent composition is from 5 to 40% by weight relative to the surfactant of the component (A).
(2) aminopolycarboxylic acid is an amino acid -N, above (1) Symbol placement of the liquid detergent composition which is N- diacetic acid.
(3) Aminopolycarboxylic acid is glutamic acid-N, N-diacetic acid, α-alanine-N, N-diacetic acid, β-alanine-N, N-diacetic acid, aspartic acid-N, N-diacetic acid, glycine -N, N- diacetic acid or serine -N, above (1) Symbol placement of the liquid detergent composition is N- diacetic acid.
[0008]
The surfactant used as the component (A) in the present invention is at least one selected from nonionic surfactants and anionic surfactants. Since people in this the nonionic surfactant has a higher solubility than the anionic surface active agent, that are suitable for preparing concentrated liquid detergent compositions.
[0009]
Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, fatty acid diethanolamide, amine oxide, amidoamine oxide and the like. Examples of the anionic surfactant include an alkyl sulfate, an alkyl polyoxyethylene sulfate, an alkyl benzene sulfonate, an α-olefin sulfonate, a fatty acid salt, an ether carboxylate, and a monoalkyl phosphate. These can use a commercial item.
[0010]
In the present invention, the aminopolycarboxylic acid chelating agent used for the builder of component (B) has one or more, preferably 1 to 2 amino groups, and 2 or more, preferably 3 to 4 carboxyl groups. And a chelating agent having a chelating action. The amino group may be a secondary amino group or a tertiary amino group. As such a chelating agent, amino acid-N, N-diacetic acid is preferable.
[0011]
Amino acid-N, N-diacetic acid is a compound represented by the following formula (1).
A-N- (CH 2 COOH) 2 (1)
(However, A-N represents an amino acid, and -N represents an amino group in the amino acid.)
As such amino acid-N, N-diacetic acid, glutamic acid-N, N-diacetic acid, α-alanine-N, N-diacetic acid, β-alanine-N, N-diacetic acid, aspartic acid-N, Examples thereof include N-diacetic acid, glycine-N, N-diacetic acid, serine-N, N-diacetic acid and the like. These amino acid-N, N-diacetic acids are synthesized by, for example, a known Strecker reaction or monochloroacetic acid using amino acids as raw materials.
[0012]
Examples of aminopolycarboxylic acid-based chelating agents other than amino acid-N, N-diacetic acid include ethylenediamine disuccinic acid and iminodisuccinic acid, which can be synthesized and used from known methods. Examples of these preferable aminopolycarboxylic acid-based chelating agents are shown by the following structural formulas.
[0013]
[Chemical 1]
Figure 0004061420
[0014]
Synthesized amino acid-N, N-diacetic acid and other aminopolycarboxylic acid-based chelating agents are generally obtained as an aqueous solution in which the counter ions of all carboxyl groups are Na salts in terms of cost. in the present invention aminopolycarboxylic acid a alkali metal - used as a builder in the form of an amine mixed salt component (B). The amine salt used is effective in any of primary to tertiary amine salts, but alkanolamine salts are desirable, and triethanolamine salts and diethanolamine salts are particularly preferable. As the alkali metal salt of the alkali metal-amine mixed salt, the K salt is preferable because it is more compatible with the surfactant than the Na salt, but the Na salt is more preferable in terms of cost.
[0015]
The aminopolycarboxylic acid chelating agent obtained by Na salt A alkali metal - or to the amine mixed salt is an aqueous solution of the obtained Na salt de Na with H-type cation exchange resin, leaving the electrodialysis In the case of Na, or by obtaining a crystal in which all carboxyl groups are H-type by acid precipitation, the solution is dissolved in the solution as it is, or in the case of a crystal, the crystal is dissolved in water. By mixing this solution with an amine or an alkali metal hydroxide-amine mixture such as potassium hydroxide or sodium hydroxide, an aqueous solution of the target salt can be obtained. In addition, a solution obtained by removing Na may be added at the time of formulating the liquid detergent, and then an amine or other alkali metal hydroxide may be further added to obtain a target salt.
[0016]
Aminopolycarboxylic acid-based chelating agents, particularly amino acid diacetate type chelating agents are known to exhibit good chelating effects, i.e., builder effects, at neutral to weakly alkaline pH of 8-12, so that pH range It is desirable to adjust the amount of amine or alkali metal hydroxide added so that In the case of a mixed salt of an alkali metal and an amine salt, the greater the amount of the amine salt, the better the compatibility with the surfactant. However, the ratio is determined in consideration of the cost of Na removal, the cost of the amine, etc. Need to be determined.
[0017]
Although glycol ethers are not limited to be used as solubilizers in the present invention, 1 to 5 carbon atoms, preferably glycol having 2 to 4 are preferred. Such glycol ethers, general ethanol for alcohol such as isopropyl alcohol has strong flammable volatile, generally inexpensive glycols propylene glycol or ethylene glycol. It is possible to further add the aforementioned alkanolamines as alcohols, but excessive addition of amines increases the viscosity and impairs usability, especially in non-ionic surfactants based on liquid detergents. is required.
[0018]
In the liquid detergent composition of the present invention, the surfactant (A) is 20 to 60% by weight, preferably 30 to 50% by weight, and the builder (B) is 0.1 to 15% by weight, preferably 1%. 10 wt%, (C) a solubilizing agent 0.5 to 30% by weight of component, you preferably 1 to 20 wt%, the balance with component (D) water. The blending ratio here is the ratio of the four components (A) to (D). (B) component builder (A) against the surfactants of Component 5 to 15 wt%, 5-40 wt% with respect to the solubilizer component (A) of the surfactant of the component (C), preferably you with 10 to 30 wt%.
[0019]
When the surfactant (A) is lower than the above range, it is commercially disadvantageous, such as an increase in the transportation cost of the liquid detergent and an increase in the package, and when it is high, the target compatibility is narrowed and the flexibility in formulation is reduced. It is not preferable because it decreases or the viscosity increases and impairs use.
When the builder of the component (B) is lower than the above range, the cleaning effect as a liquid detergent is low, and when it is high, the range of compatibility with the surfactant is narrowed and the flexibility in formulation is lowered, which is not preferable.
When the solubilizer of the component (C) is lower than the above range, the compatibility of the components (A) and (B) is lowered, and when it is high, the flexibility in formulation is lowered, which is not preferable.
[0020]
If necessary, the liquid detergent composition of the present invention may contain other additives such as a viscosity modifier, a humectant, an antiseptic, a fungicide, a pigment, and a fragrance at an arbitrary ratio.
[0021]
The liquid detergent composition of the present invention can be used for all uses as a cleaning agent, but is particularly suitable for use as a household detergent in washing applications such as clothing and household.
In use, it can be used as it is, but since it has a high concentration, it can also be diluted with water.
[0022]
【The invention's effect】
According to the present invention, A Min aminopolycarboxylic acid to a specific surfactant - so formulated with solubilizing agent comprising a builder and glycol ethers consisting of alkali metal mixed salt in a specific ratio, can exhibit strong alkalinity In addition, it is possible to obtain a high-concentration liquid detergent composition that is excellent in compatibility and does not become cloudy even if the surfactant concentration is increased.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the present invention will be described below. In each example,% is% by weight.
Examples 1-1 4 and Comparative Examples 1-18
The following surfactants, solubilizers consisting of a builder and alcohols were added at the blending ratios shown in Tables 1-2, and were balanced with water. Then, sufficient mixing was performed, and the compatibility when left at room temperature and 40 ° C. was visually observed. In addition, what was left and separated into two layers was observed again after mixing after observation. Tables 1 and 2 summarize the formulation and observation results.
[0024]
The compounds used are as follows.
Surfactant:
Nonionic surfactant; Kao-made Emulgen 108 (trademark, ethylene oxide alkyl ether type)
Anionic surfactant; LAS; reagent linear alkylbenzene sulfonic acid soda (no sodium sulfate content)
builder:
GLDA; glutamic acid diacetate αAD; α-alanine diacetate βAD; β-alanine diacetate SDA; serine diacetate ASDA; aspartate diacetate NTA; glycine diacetate EDDS; ethylenediamine disuccinate IDS;
TEA; triethanolamine DEA; diethanolamine MEA; monoethanolamine solubilizer:
PG; propylene glycol IPA; isopropyl alcohol
In Tables 1 and 2, -2Na2TEA after GLDA represents a counter ion of a carboxyl group in the molecule and means a mixed salt of 2Na and 2TEA. -2Na2H is a 2Na salt, which means that the pH is low. In either case, the concentration is expressed as a converted value when all carboxyl groups are Na salts.
[0026]
[Table 1]
Figure 0004061420
[0027]
[Table 2]
Figure 0004061420
[0028]
From the results of Tables 1-2, when Example 1 is compared with Comparative Examples 3, 4, 7, 8, and 10, the builder is an amine salt or an alkali metal-amine mixed salt, and the solubilizer is an alcohol composition. Although the product has compatibility, it can be seen that if the builder is a Na salt, no solubilizer, or alkanolamine, the compatibility is poor and cloudy.
[0029]
The same applies to Example 3 and Comparative Example 11, Example 7 and Comparative Example 6, Example 9 and Comparative Example 12, Example 10 and Comparative Example 13, Example 11 and Comparative Example 14, Example 15 and Comparative Example. 17. The same applies to the comparison between Example 16 and Comparative Example 18.
[0030]
As a result, by blending a specific amount of amine salt or alkali metal-amine mixed salt of aminopolycarboxylic acid as a builder as a builder with a high concentration of nonionic or anionic surfactant, and a solubilizer, It can be seen that a high-concentration liquid detergent composition having excellent compatibility and no cloudiness can be obtained.

Claims (3)

(A):ノニオン性界面活性剤およびアニオン性界面活性剤から選ばれる1種以上の界面活性剤20〜60重量%
(B):アミノポリカルボン酸系キレート剤のアルカリ金属−アミン混合塩から選ばれる1種以上のビルダー0.1〜15重量%、
(C):グリコール類から選ばれる1種以上の可溶化剤0.5〜30重量%、ならびに
(D):水 残部を含み、
(B)成分のビルダーは(A)成分の界面活性剤に対し5〜15重量%、
(C)成分の可溶化剤は(A)成分の界面活性剤に対して5〜40重量%である液体洗剤組成物。
(A): 20 to 60% by weight of one or more surfactants selected from nonionic surfactants and anionic surfactants,
(B): A alkali metal amino polycarboxylic acid chelating agent - one or more builders 0.1-15 wt% selected from amine mixed salt,
(C): 1 or more solubilizing agents selected from glycol ethers 0.5-30 wt%, and
(D): including water balance
The builder of the component (B) is 5 to 15% by weight based on the surfactant of the component (A).
(C) The liquid detergent composition whose solubilizer of a component is 5 to 40 weight% with respect to the surfactant of (A) component .
アミノポリカルボン酸がアミノ酸−N,N−二酢酸である請求項1記載の液体洗剤組成物。Aminopolycarboxylic acids amino -N, claim 1 Symbol placement of the liquid detergent composition which is N- diacetic acid. アミノポリカルボン酸がグルタミン酸−N,N−二酢酸、α−アラニン−N,N−二酢酸、β−アラニン−N,N−二酢酸、アスパラギン酸−N,N−二酢酸、グリシン−N,N−二酢酸、またはセリン−N,N−二酢酸である請求項1記載の液体洗剤組成物。Aminopolycarboxylic acid is glutamic acid-N, N-diacetic acid, α-alanine-N, N-diacetic acid, β-alanine-N, N-diacetic acid, aspartic acid-N, N-diacetic acid, glycine-N, N- diacetic acid or serine -N, liquid detergent composition according to claim 1 Symbol placement is N- diacetic acid.
JP18872398A 1998-07-03 1998-07-03 Liquid detergent composition Expired - Lifetime JP4061420B2 (en)

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US20100311998A1 (en) * 2007-08-02 2010-12-09 Akzo Nobel N.V. Chelating agent based ionic liquids, a process to prepare them, and their use
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