JP2007023210A - Liquid cleanser composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid detergent composition which has excellent storage stability and low temperature stability, even when containing a chelating agent in a high concentration. <P>SOLUTION: This liquid detergent composition is characterized by containing (a) a chelating agent, (b) a surfactant, and (c) an aromatic hydrotropic agent in specific amounts, respectively, and having a pH value of 3 to 7 at 20°C and a sodium ion (Na<SP>+</SP>)/potassium ion (K<SP>+</SP>) molar ratio of 1 to 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid detergent composition, and more particularly to a liquid detergent composition for hard surfaces suitable as a detergent for tableware and kitchen use.

  The detergent composition for washing dishes may be used for washing around a sink made of stainless steel or resin, in addition to washing dishes which are the main washing objects. For this reason, it is desirable that the detergent composition for dishwashing is excellent in cleaning power against dirt around the sink, such as scale dirt.

In order to give the cleaning composition for dishwashing the function of cleaning scales adhering around the kitchen sink, it is conceivable to add a chelating agent such as citric acid at a high concentration. For example, Patent Document 1 describes the use of a polyvalent carboxylic acid such as citric acid in a detergent composition for dishwashing. Furthermore, Patent Documents 2 to 6 can be referred to for the dishwashing detergent composition containing a polyvalent carboxylic acid such as citric acid.
JP 2003-27099 A JP-A-9-78091 JP 2001-172697 A Japanese Patent Laid-Open No. 11-80784 JP-T-2002-517549 Japanese National Patent Publication No. 10-508060

  However, today, liquid detergent compositions for tableware and the like tend to become so-called concentrated compositions with an increased effective component concentration, and such systems have high concentrations of polyvalent carboxylic acids such as citric acid. If blended in, the composition may gel and cause clogging of the container. In particular, such a problem tends to be remarkable in a composition stored at a low temperature. In general, liquid detergent composition for household dishwashing is filled in a container having a discharge port with a diameter of about 1 to 5 mm and used by discharging a small amount to a sponge or the like. When the discharged composition is filled, clogging of the discharge port becomes significant when the discharge operation is repeated at a low temperature.

  The subject of the present invention is excellent in low-temperature stability even if a large amount of a chelating agent such as citric acid is added to impart excellent cleaning power to dirt on hard surfaces and dirt around the sink, An object of the present invention is to provide a liquid detergent composition suitable for hard surfaces and tableware, in which clogging of discharge ports is reduced.

The present invention comprises (a) a chelating agent (hereinafter referred to as component (a)) 2.5 to 8% by mass, (b) a surfactant (hereinafter referred to as component (b)) 20 to 50% by mass, (c) Aromatic hydrotrope agent (hereinafter referred to as component (c)) 2.5 to 8% by mass, pH at 25 ° C. is 3 or more and less than 7, and contains sodium ions (Na ⁺ ) and potassium ions (K ⁺ ). The present invention relates to a liquid detergent composition having a molar ratio [Na ⁺ ] / [K ⁺ ] = 1 to 20.

  The present invention also relates to a liquid detergent product obtained by filling a container having a discharge port having a diameter of 1 to 5 mm with the liquid detergent composition of the present invention.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid detergent composition excellent in low-temperature stability and reduced clogging of a discharge outlet and suitable for hard surfaces and tableware is provided. Since the composition of the present invention can provide such an effect even if it contains a large amount of a chelating agent such as citric acid, it exhibits excellent detergency against dirt on hard surfaces as well as dirt around the sink. .

<(A) component>
As the component (a), a hydroxycarboxylic acid chelating agent and / or an aminopolycarboxylic acid chelating agent are preferable. Specifically, citric acid, malic acid, EDTA (ethylenediaminetetraacetic acid), tartaric acid, gluconic acid, an aminopolycarboxylic acid in which one or more carboxymethyl groups are bonded to the nitrogen atom of an amino acid compound [for example, MGDA (methylglycine diacid) Acetic acid)] and those selected from these salts. Of these, citric acid and its salts are preferred.

  Citric acid salts include trisodium citrate, disodium hydrogen citrate, sodium dihydrogen citrate, tripotassium citrate, dipotassium hydrogen citrate, potassium dihydrogen citrate, triammonium citrate, dihydrogen citrate Examples include ammonium, ammonium dihydrogen citrate, calcium citrate, magnesium citrate, and zinc citrate.

  Examples of the malic acid salt include sodium malate, disodium malate, sodium hydrogen malate, dimethyl malate, and diethyl malate.

  As salts of EDTA, EDTA tetrasodium, EDTA trisodium, EDTA disodium, EDTA dihydrogen disodium, EDTA tripotassium, EDTA dipotassium, EDTA zinc disodium, EDTA calcium disodium, EDTA diammonium, EDTA magnesium disodium And so on.

  Examples of the tartaric acid salt include sodium tartrate, potassium tartrate, calcium tartrate, ammonium tartrate, ethylenediamine tartrate, sodium potassium tartrate, diethyl tartrate, dimethyl tartrate, ammonium hydrogen tartrate, potassium hydrogen tartrate, sodium hydrogen tartrate and the like.

  Examples of the salt of gluconic acid include zinc gluconate, potassium gluconate, sodium gluconate, magnesium gluconate and the like.

Examples of the MGDA salt include MGDA sodium, MGDA disodium, MGDA tripotassium, MGDA dipotassium, MGDA ammonium and the like.
<(B) component>
Component (b) of the present invention includes (b1) an anionic surfactant having a hydrocarbon group having 10 to 18 carbon atoms and one or more sulfonate groups or sulfate ester bases in the molecule [hereinafter, (b1 ) Component] and (b2) an amine oxide surfactant having a hydrocarbon group having 10 to 18 carbon atoms and an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms [hereinafter referred to as (b2 ) Component]] is preferred.

As the component (b1), a compound represented by the following general formula (2) is preferable.
R ¹² —O— (C ₂ H ₄ O) _a —SO _3. (1 / m) M (2)
[The meaning of each symbol in the formula is as follows.
R ¹² is an alkyl group having 10 to 18 carbon atoms.
a shows the number of 0-15, and when the compound of General formula (2) is a mixture of the compound of a = 0-15, the sum total content of the compound of a = 1-15 in a mixture is 40-90 mass. %, The content of a = 0 is 60 to 15% by mass.
The average value of a is 1-5.
M is an alkali metal or an alkaline earth metal. m represents the valence of M. ]

  As a preferable example of the component (b1), an alkylbenzenesulfonic acid having an alkyl group having 10 to 15 carbon atoms or a salt thereof, a monoalkyl sulfate salt having 10 to 16 carbon atoms, or an alkyl group having 10 to 16 carbon atoms. , A polyoxyalkylene alkyl ether sulfate ester salt having an average (average value of a) 1.0 to 4.0 moles of an oxyalkylene group having 2 or 3 carbon atoms, an α-olefin sulfonate having 8 to 16 carbon atoms, Examples include α-sulfo fatty acid (carbon number 8 to 16) lower alkyl (carbon number 1 to 3) ester salt. Examples of the salt include sodium salt, potassium salt, magnesium salt, and alkanolamine salt, and sodium salt, potassium salt, and magnesium salt are particularly preferable from the viewpoint of viscosity.

  In the present invention, an alkyl group having 10 to 14 carbon atoms, particularly an oxyalkylene group having 2 or 3 carbon atoms, preferably an oxyethylene group is average (average value of a) of 1.0 to 3.0 mol, particularly It is preferable to use a polyoxyalkylene alkyl ether sulfate salt added with 1.5 to 3.0 mol, preferably sodium salt, potassium salt, or magnesium salt from the viewpoint of cleaning effect, and a high concentration anion. It is preferable because the storage stability of a detergent containing a surfactant at low or high temperatures can be improved.

  a shows the number of 0-15, and when the compound of General formula (2) is a mixture of the compound of a = 0-15, the sum total content of the compound of a = 1-15 in a mixture is 40-90 mass. %, More preferably 50 to 90% by mass, still more preferably 60 to 85% by mass, and the content of the compound with a = 0 is the remaining amount in the above numerical range (amount in which the total is 100% by mass). Is preferred.

  When a polyoxyalkylene alkyl ether sulfate salt is used, a polyoxyalkylene alkyl ether sulfate salt having a branched primary alkyl group produced from an alcohol obtained by hydroformylating a linear 1-alkene as a raw material is suitable. It is. Here, hydroformylation is a method in which an alcohol is obtained by adding carbon monoxide to a linear 1-alkene using a carbonyl complex such as iron, cobalt or nickel as a catalyst. An alcohol containing groups is obtained.

  The polyoxyalkylene alkyl ether sulfate ester salt further adds alkylene oxide, preferably propylene oxide (hereinafter referred to as PO) or ethylene oxide (hereinafter referred to as EO), more preferably EO, to such an alcohol, Further, it can be obtained by sulfonation with sulfur trioxide or chlorosulfonic acid and neutralization with an alkali agent. The average added mole number is preferably 1.0 to 3.0, more preferably 1.5 to 3.0, and particularly preferably 1.5 to 2.5 from the viewpoint of the cleaning effect.

  As an alkaline agent used for neutralization, sodium hydroxide, potassium hydroxide, magnesium hydroxide, sodium carbonate, potassium carbonate, and magnesium carbonate are preferable, and sodium hydroxide, potassium hydroxide, and magnesium hydroxide are more preferable.

  The polyoxyalkylene alkyl ether sulfate salt thus obtained contains a branched alkyl group, and the mass ratio of the polyoxyalkylene branched alkyl ether sulfate salt to the total polyoxyalkylene alkyl ether sulfate ester salt Is preferably 5 to 80% by mass, more preferably 10 to 70% by mass for achieving an excellent cleaning effect.

  In particular, when the polyoxyalkylene alkyl ether sulfate salt is blended in an amount exceeding 10% by mass in the composition, particularly when blended at a concentration of 15 to 40% by mass, the alkyl group of the polyoxyalkylene alkyl ether sulfate salt is used. Preferably satisfies the condition of the branching rate. The polyoxyalkylene alkyl ether sulfate salt itself has a less sticky feel than other surfactants, but with an increase in the feel of stickiness when used in combination with an amine oxide surfactant, the viscosity increases due to higher concentration. There is a concern about the feeling of slimness from being easily left on the surface to be cleaned by gelation or gelation. This problem is reduced by selecting the compound having the branched chain.

  As the component (b2), a compound represented by the following general formula (3) is preferable.

[Wherein, R ¹³ represents an alkyl group having 10 to 18 carbon atoms or an alkenyl group having 10 to 18 carbon atoms, R ¹⁴ represents an alkylene group having 1 to 6 carbon atoms, and A represents —COO—, —CONH— , -OCO-, -NHCO-. b is a number of 0 or 1, and R ¹⁵ and R ¹⁶ are each an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms. ]

In the general formula (3), R ¹³ is preferably an alkyl group having 10 to 14 or an alkenyl group having 10 to 18 carbon atoms, and particularly preferably a lauryl group (or lauric acid residue) and / or a myristyl group (or Myristic acid residue). A is preferably —COO— or —CONH—, and most preferably —CONH—. R ¹⁴ preferably has 2 or 3 carbon atoms, and R ¹⁵ and R ¹⁶ are preferably methyl groups.

In the present invention, R ¹³ may be a single alkyl (or alkenyl) chain length or a mixed alkyl group (or alkenyl group) having a different alkyl (or alkenyl) chain length. In the latter case, those having a mixed alkyl (or alkenyl) chain length derived from a vegetable oil selected from coconut oil and palm kernel oil are preferred. Specifically, it is a cleaning that the molar ratio of lauryl group (or lauric acid residue) / myristyl group (or myristic acid residue) is 95/5 to 20/80, preferably 90/10 to 30/70. It is preferable from the point of an effect and foaming property.

  As the component (b), other surfactants can be used. For example, an alkenyl succinate etc. are mentioned as anionic surfactants other than (b1) component. In particular, compounds selected from amphoteric surfactants and nonionic surfactants other than the component (b2) are suitable.

  As the amphoteric surfactant, a compound of the following general formula (4) [hereinafter referred to as component (b3)] is preferred.

[Wherein, R ²¹ represents an alkyl group or an alkenyl group having 9 to 23 carbon atoms, and R ²² represents an alkylene group having 1 to 6 carbon atoms. B is a group selected from —COO—, —CONH—, —OCO—, —NHCO—, and —O—, and c is a number of 0 or 1. R ²³ and R ²⁴ are each an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group, and R ²⁵ is an alkylene group having 1 to 5 carbon atoms which may be substituted with a hydroxy group. D is a group selected from —SO ₃ ⁻ , —OSO ₃ ⁻ and —COO ⁻ . ]

In the general formula (4), R ²¹ is preferably an alkyl group having 9 to 15 carbon atoms, particularly 9 to 13 carbon atoms, and R ²² is preferably an alkylene group having 2 or 3 carbon atoms. B is preferably -CONH-, and c is preferably 0 or 1. R ²³ and R ²⁴ are preferably a methyl group or a hydroxyethyl group. D is preferably —SO ₃ ⁻ or —COO ⁻ , and when D is —SO ₃ ^— , R ²⁵ is preferably —CH ₂ CH (OH) CH ₂ —, and when D is —COO ⁻ , R is ²⁵ is preferably a methylene group.

  As the nonionic surfactant (hereinafter referred to as the component (b4)), a compound selected from the compound represented by the following general formula (5) and the compound represented by the general formula (6) is preferable.

R ³¹ -E - [(R ³² O) _d -H] _e (5)
[Wherein R ³¹ represents an alkyl group or alkenyl group having 7 to ¹⁸ carbon atoms, and R ³² represents an alkylene group having 2 or 3 carbon atoms. d shows the number of 2-100. E is —O—, —CON—, or —N—. When E is —O—, e is 1, and when E is —CON— or —N—, e is 2. ]
R ⁴¹ − (OR ⁴² ) _f G _h (6)
[Wherein R ⁴¹ is a linear alkyl group having 8 to 16, preferably 10 to 16, particularly preferably 10 to 14 carbon atoms, and R ⁴² is an alkylene group having 2 to 4 carbon atoms, preferably ethylene group or propylene. A group, in particular an ethylene group, G is a residue derived from a reducing sugar, f is an average value of 0-6, preferably 0-3, particularly preferably 0, and h is an average value of 1-10, preferably Represents a number from 1 to 5, particularly preferably from 1 to 2. ]

Specific examples of the compound of the general formula (5) include the following compounds.
^{_{R 31 -O- (C 2 H 4}} O) i -H (5-1)
[Wherein R ³¹ represents the above-mentioned meaning. i is a number from 2 to 100. ]
R ³¹ —O— (C ₂ H ₄ O) _j (C ₃ H ₆ O) _k —H (5-2)
[Wherein R ³¹ represents the above-mentioned meaning. j and k are each independently a number of 2 to 70, and ethylene oxide and propylene oxide may be random or block adducts. ]

[Wherein R ³¹ represents the above-mentioned meaning. The sum of n and m is a number from 3 to 70. ]

  In general formula (5-3), G is a residue derived from a reducing sugar, and the reducing sugar as a raw material may be either aldose or ketose, and a triose having 3 to 6 carbon atoms, Mention may be made of tetrose, pentose and hexose. Specific examples of aldose include apiose, arabinose, galactose, glucose, lyxose, mannose, galose, aldose, idose, talose and xylose, and examples of ketose include fructose. In the present invention, among these, aldopentose or aldohexose having 5 or 6 carbon atoms is particularly preferred, and glucose is most preferred.

The compound of the general formula (6) can be easily synthesized by subjecting the reducing sugar and R ⁴¹ — (OR ⁴² ) _f —OH to an acetalization reaction or a ketalization reaction using an acid catalyst. In the case of an acetalization reaction, a hemiacetal structure or a normal acetal structure may be used.

  Among the above, at least one selected from the compound of the general formula (4) and the compound of the general formula (6) is particularly preferable because it can improve foaming and enhance the cleaning effect.

<(C) component>
As the component (c), toluenesulfonic acid, xylenesulfonic acid, cumenesulfonic acid, benzoic acid and salts thereof such as sodium salt and potassium salt are preferable, and p-toluenesulfonic acid or a salt thereof is particularly preferable. . Magnesium salts can also be used.

<Other ingredients>
The liquid detergent composition of the present invention preferably contains 0.1 to 10% by mass of (d) a compound represented by the following general formula (1) [hereinafter referred to as component (d)].
R ¹¹ —O—X (1)
[Wherein R ¹¹ is a group selected from 2-ethylhexyl, isononyl, and isodecyl, and X is CH ₂ CH (OH) CH ₂ OH. ]

R ¹¹ in general formula (1) from the viewpoint of detergency, or 2-ethylhexyl.

For example, when R ¹¹ is 2-ethylhexyl, the compound of the general formula (1) as the component (d) is composed of 2-ethylhexanol and an epoxy compound such as epihalohydrin or glycidol, an acid catalyst such as BF ₃ , or an aluminum catalyst. In general, a method of producing a mixture by reaction is used, and is a mixture containing a plurality of products as described in JP-A No. 2001-49291.

  Specifically, as 2-ethylhexyl monoglyceryl ether, a compound in which 2-ethylhexanol is added to the 1-position of the epoxy compound (3- (2-ethylhexyloxy) -1,2-propanediol, hereinafter referred to as (d1)) And a compound added to the 2-position of the epoxy compound (2- (2-ethylhexyloxy) -1,3-propanediol, hereinafter referred to as (d2)). Moreover, as a by-product, a polyaddition compound (hereinafter referred to as (d3)) obtained by further adding an epoxy compound to (d1) or (d2) can be exemplified.

  In the present invention, it is preferable to use 2-ethylhexyl monoglyceryl ether having a content of the component (d3) of 30% by mass or less, preferably 10% by mass or less, particularly preferably 1% by mass or less in the component (d). .

  In the present invention, for the purpose of improving storage stability and as a viscosity modifier, a solvent other than the component (d) [hereinafter referred to as component (e)] can be contained. Specific examples of the solvent are preferably water-soluble organic solvents selected from ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, diethylene glycol, dipropylene glycol, glycerin, isoprene glycol, propylene glycol monomethyl ether, and propylene glycol monoethyl ether.

  The cleaning agent of the present invention includes a polymer for preventing gelation, for example, a gelation-preventing polymer described in JP-A-11-513067 (hereinafter referred to as component (f)), particularly polyalkylene glycol. It is preferable from the viewpoint of viscosity control and storage stability. Specific examples of the polyalkylene glycol for preventing gelation include polypropylene glycol and polyethylene glycol having a weight average molecular weight of 200 to 3000 determined by gel permeation chromatography using polyethylene glycol as a standard. it can.

<Liquid cleaning composition>
In the liquid detergent composition of the present invention, the molar ratio of sodium ion [Na ⁺ ] to potassium ion [K ⁺ ] is [Na ⁺ ] / [K ⁺ ] = 1 to 20, preferably 1 to 15, more preferably Is 1-11. When the molar ratio is within this range, excellent storage stability, low-temperature stability, and dischargeability from the container can be achieved even in a concentrated composition containing the components (a) and (b) at a high concentration. Obtainable. The concentration of Na ⁺ and K ^{+ in} the composition can be measured by atomic absorption analysis, and the molar ratio of [Na ⁺ ] / [K ⁺ ] can be calculated from this measured value. It is preferable to adjust the types and blending amounts of the components (a) to (c) and optional components so as to achieve such a molar ratio, and alkali agents such as alkali metal hydroxides and alkali metal carbonates, particularly water. The molar ratio is preferably adjusted with an alkali agent containing sodium such as sodium oxide or sodium carbonate and an alkali agent containing potassium such as potassium hydroxide or potassium carbonate.

  The content ratio of the component (a) in the liquid detergent composition of the present invention is 2.5 to 8% by mass, preferably 2.5 to 7% by mass, from the viewpoints of detergency against scale dirt and storage stability. Preferably it is 3-6 mass%.

  Moreover, the content rate of (b) component is 20-50 mass% in a composition from a viewpoint of the washability with respect to an oil stain, and storage stability, Preferably it is 25-50 mass%, More preferably, it is 25-45 mass%. It is. The proportion of the (b1) component and the (b2) component in the total amount of the (b) component is preferably 15 to 40% by mass, more preferably 15 to 37% by mass, and particularly preferably 17 to 35% by mass. The mass ratio of the (b1) component and the (b2) component is preferably (b1) / (b2) = 2 to 12, more preferably 2.5 to 12, and particularly preferably 4.5 to 10.

  In the present invention, the component (b3) and the component (b4) are preferably contained for the purpose of enhancing the cleaning effect and improving the storage stability. In particular, the compound of the general formula (4) and the compound of the general formula (6) Can improve foamability. However, a large amount of blending tends to promote luster when washing dishes. Therefore, the total ratio of the component (b3) and the component (b4) in the cleaning agent is preferably 0.1 to 20% by mass, more preferably 0.5 to 15% by mass, and particularly preferably 1 to 15% by mass.

  The content rate of (c) component is 2.5-8 mass% in a composition from a viewpoint of storage stability, Preferably it is 3-7 mass%, More preferably, it is 3.5-7 mass%.

  The content ratio of the component (d) is preferably 0.1 to 10% by mass, more preferably 0.2 to 6% by mass, and particularly preferably 0. 5 to 5% by mass.

  In addition, when using (d) component, the mass ratio with (a) component which is a chelating agent is from a viewpoint of improving the washing performance with respect to both oil dirt (at the time of dishwashing) and scale dirt (at the time of kitchen sink washing), (D) / (a) 0.01-3 are preferable by mass ratio, More preferably, it is 0.05-2.5, More preferably, it is 0.1-2.

  When the (d) / (a) mass ratio is less than or equal to the upper limit, not only an increase in detergency against oil stains is observed, but also excellent performance is exhibited in foaming properties. When it is at least the lower limit value, the ability to remove scale dirt can be improved, and the transparency of the glass and the gloss of the metal surface can be recovered.

  Water is the adjustment amount made into 100 mass% in total including the (a)-(c) component and the other component contained as needed.

  The component (e) and the component (f) of the present invention are preferable in terms of improving storage stability, and are effective as a viscosity modifier, and the content of the component (e) is 1 to 20% by mass in the composition. Further, 5 to 20% by mass, particularly 5 to 15% by mass, and the content of the component (f) is 0.05 to 10% by mass, further 0.05 to 5% by mass, particularly 0.1 to 3% in the composition. Mass% is preferred.

  The liquid detergent composition of the present invention is in a liquid form in which the above components are dissolved or dispersed in water, and the water content is preferably 20 to 60% by mass, more preferably 30 to 30% from the viewpoint of storage stability. 60 mass%, More preferably, it is 40-60 mass%, Most preferably, it is 45-55 mass%.

  The pH (25 ° C.) of the liquid cleaning composition of the present invention is 3 or more and less than 7 from the viewpoint of improving the cleaning performance against both oil stains (dishwashing) and scale stains (kitchen sink washing). , Preferably 4 or more and less than 6, more preferably 4.5 or more and less than 6.

  Examples of pH adjusters include acid agents such as hydrochloric acid and sulfuric acid, inorganic acids such as hydrochloric acid and organic acids, sodium hydroxide, potassium hydroxide, ammonia and derivatives thereof, and amine salts such as monoethanolamine, diethanolamine, and triethanolamine. An alkali agent such as sodium or potassium carbonate is preferably used alone or in combination, and an acid selected from hydrochloric acid and sulfuric acid and an alkali agent selected from sodium hydroxide and potassium hydroxide are particularly preferable. Any compound is blended within a range that does not have a great influence on the viscosity characteristics. In addition, pH can also be adjusted with (a) component.

  In addition, about Mg generally used as a detergency enhancer, in the detergency composition of the present invention in which the component (a), particularly citric acid is highly blended, the detergency against scale stains when used in combination with citric acid. Because of the risk of reducing the amount, pay attention to the amount. The amount of Mg is preferably 5 to 0.0001% by mass, more preferably 1 to 0.0001% by mass, further preferably 0.4 to 0.0001% by mass, and particularly preferably 0.1 to 0.0001% by mass. preferable. The Mg-containing compound used in the blending is preferably a compound that is easily dissolved in water, and specific examples include magnesium chloride, magnesium nitrate, magnesium carbonate, and magnesium sulfate. Further, although it takes time to dissolve, magnesium hydroxide and magnesium phosphate can also be used.

  The viscosity at 20 ° C. of the cleaning composition of the present invention is preferably 10 to 1000 mPa · s, more preferably 30 to 700 mPa · s, and particularly preferably 30 to 500 mPa · s from the viewpoint of ease of use. Such a viscosity is adjusted by using, for example, the above-described component (e) and component (f).

  The viscosity as used in the present invention is measured as follows. First, TOKIMEC. The rotor type no. Prepare one equipped with 2 rotors. The sample is filled in a tall beaker and adjusted to 20 ° C. in a constant temperature bath at 20 ° C. A sample adjusted to a constant temperature is set in a viscometer. The rotational speed of the rotor is set to 60 r / m, and the viscosity 60 seconds after the start of rotation is taken as the viscosity of the present invention.

  As other components, as long as the viscosity characteristics are not affected, components that are usually blended in liquid detergents can be blended. For example, a fragrance | flavor component, disinfection component, antiseptic | preservative, a clouding agent, and a coloring agent can be mentioned.

  The liquid cleaning composition of the present invention is applied to a method in which a cleaning material is soaked in a flexible material such as sponge (preferably containing water) and directly brought into contact with tableware, cooking utensils, kitchen sinks, bathtubs, etc. it can.

  Since the liquid cleaning composition of the present invention has excellent cleaning performance against oil stains and scale stains, it can be applied as a cleaning agent for cleaning objects including oil stains and scale stains. Specifically, it is suitable as a dishwashing detergent and a kitchen detergent, and can also be applied as a water detergent such as a washstand detergent, a bathroom cleaner, and a toilet cleaner.

  A liquid detergent product can be obtained by filling the liquid detergent composition of the present invention into a container having a discharge port having a diameter of 1 to 5 mm. As a material for the container, a plastic material that is widely used can be used. For example, polyethylene terephthalate, polypropylene, polyethylene, polycarbonate, acrylic, ABS resin, melamine resin and the like can be mentioned. The shape of the cap including the discharge port is not particularly limited as long as it is generally used, and examples thereof include a squeeze type, a hinge type, a trigger spray type, and a pump type. About the capacity | capacitance of a container, what can put about 100-1000 ml liquid detergent is preferable from a viewpoint of usability.

  The shape of the discharge port of the cap part is not particularly limited, but not only a general circular hole but also a pull-push type or a pump-up type tube shape can be used.

  A liquid detergent composition was prepared using the components shown in Table 1. The low temperature stability (storage stability at low temperature) and dischargeability of these compositions were evaluated by the following methods. The results are also shown in Table 1. The pH of the composition is measured by the following method.

<Measurement method of pH>
A pH measuring composite electrode (HORIBA glass sliding sleeve type) was connected to a pH meter (HORIBA pH / ion meter F-23), and the power was turned on. A saturated potassium chloride aqueous solution (3.33 mol / L) was used as the pH electrode internal solution.

  Next, pH 4.01 standard solution (phthalate standard solution), pH 6.86 (neutral phosphate standard solution), and pH 9.18 standard solution (borate standard solution) were each filled in a 100 ml beaker. It was immersed in a constant temperature bath at 30 ° C. for 30 minutes. The pH measurement electrode was immersed in a standard solution adjusted to a constant temperature for 3 minutes, and calibration was performed in the order of pH 6.86 → pH 9.18 → pH 4.01.

  The sample was filled in a 100 ml beaker and adjusted to 25 ° C. in a constant temperature bath at 25 ° C. The pH measurement electrode was immersed in a sample adjusted to a constant temperature for 3 minutes, and the pH was measured.

<Low temperature stability>
250 ml of the liquid detergent composition shown in Table 1 was put into a PET bottle dedicated to dishwashing detergent, stored at -5 ° C for 20 days, and the change in the appearance of the liquid was evaluated according to the following criteria in comparison with immediately after preparation. .
No change in appearance ... ○
Appearance changes such as gelation, separation, and precipitation formation.

<Dischargeability>
Put 250 ml of the liquid detergent composition shown in Table 1 into a PET bottle dedicated to dishwashing detergent, perform a morning and evening discharge test at the same temperature for 2 weeks in a 5 ° C storage environment, measure the discharge diameter, and clog the cap. Was observed. From the clogged state of the cap, the dischargeability was defined as (hole diameter after storage) / (hole diameter before start of test) × 100. From this definition, the closer the value is to 100, the better the dischargeability, and a value of zero means that the hole is clogged and no detergent comes out.

The components in the table are as follows.
ES: Sodium polyoxyethylene alkyl ether sulfate [The raw material alcohol is an alcohol obtained by hydroformylation using 1-decene and 1-dodecene 50/50 (mass ratio) as raw materials. After adding 2 mol of EO to this alcohol on average, it was sulfated with sulfur trioxide and neutralized with sodium hydroxide (neutralized until the pH of 11 diluted with water was 11). The ratio of the total polyoxyethylene branched alkyl ether sulfate in the total sodium polyoxyethylene alkyl ether sulfate was 42% by mass. ]
APAO: Amidopropyl laurate-N, N-dimethylamine oxide AO: N-lauryl-N, N-dimethylamine oxide Sulfobetaine: Lauryl dimethyl sulfobetaine Potassium alkenyl succinate: Carbon number 12 of alkenyl group
Nonionic: alkyl glucoside having an alkyl group composition of C ₁₂ / C ₁₄ = 60/40 (mass ratio) and an average degree of glucoside condensation of 1.5 GE-2EH: 2-ethylhexyl monoglyceryl ether (monoglyceryl ether) 98% by mass)
-Polypropylene glycol: having an average molecular weight of 1000-Preservative: Proxel BDN (manufactured by Avicia Co., Ltd.)

Claims (7)

(A) Chelating agent 2.5-8 mass%, (b) Surfactant 20-50 mass%, (c) Aromatic hydrotrope agent 2.5-8 mass%, pH of 25 degreeC is contained. A liquid detergent composition having a molar ratio of sodium ion (Na ⁺ ) to potassium ion (K ⁺ ) of 3 to less than 7 and [Na ⁺ ] / [K ⁺ ] = 1 to 20. The liquid detergent composition according to claim 1, wherein (a) the chelating agent is a hydroxycarboxylic acid chelating agent and / or an aminopolycarboxylic acid chelating agent. (A) The liquid detergent composition according to claim 1 or 2, wherein the chelating agent is selected from citric acid, malic acid, gluconic acid, ethylenediaminetetraacetic acid, and salts thereof. (B) a surfactant is (b1) an anionic surfactant having a hydrocarbon group having 10 to 18 carbon atoms and one or more sulfonate groups or sulfate ester bases in the molecule; and (b2) 10 carbon atoms. The liquid according to claim 1, which is selected from amine oxide surfactants having a hydrocarbon group of ˜18 and an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms. Cleaning composition. (C) The liquid detergent composition according to claim 1, wherein the aromatic hydrotrope is toluenesulfonic acid and benzoic acid / or a salt thereof. (D) The liquid cleaning composition of any one of Claims 1-5 which contains 0.1-10 mass% of compounds represented by following General formula (1).
R ¹¹ —O—X (1)
[Wherein R ¹¹ is a group selected from 2-ethylhexyl, isononyl, and isodecyl, and X is CH ₂ CH (OH) CH ₂ OH. ] The liquid detergent product formed by filling the liquid detergent composition according to any one of claims 1 to 3 into a container having a discharge opening having a diameter of 1 to 5 mm.