JP2009256527A - Liquid cleaning agent composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid cleaning agent composition having high cleaning effect and foamability and excellent in easy elimination of slimy touch upon rinsing even though using a straight chain alcohol, e.g. a natural alcohol as a raw material alcohol of an AES. <P>SOLUTION: The liquid cleaning agent composition contains (a) a prescribed amount of a mixture which contains a compound represented by following general formula (1) and wherein average added mole number m of propylene oxide and average added mole number n of ethylene oxide satisfy 0<m<1 and 0<n≤3, (b) a prescribed amount of a specified alkane sulfonic acid type surfactant, (c) a prescribed amount of a specified hydroxy carboxylic acid or its salt, and a phase stabilizer selected from (d) a hydrotrope agent and (e) an organic solvent, and water. R<SP>1a</SP>O-(PO)<SB>m1</SB>(EO)<SB>n1</SB>SO<SB>3</SB>M (1). (In the formula, R<SP>1a</SP>denotes a 3-18C straight chain alkyl group wherein a carbon atom bonded to an oxygen atom is a primary carbon atom, PO and EO denote a propyleneoxy group and an ethyleneoxy group, respectively, m1 and n1 denote added mole numbers of PO and EO, respectively and integers of 0 or more, respectively, and M denotes a cation). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid detergent composition, and in particular, to a liquid detergent composition comprising an anionic surfactant produced from a naturally derived raw material as a main surfactant. Specifically, the present invention relates to a liquid detergent composition suitable for cleaning hard surfaces such as around kitchens, especially tableware and cooking utensils.

In recent years, from the viewpoint of reducing environmental impact, concentrated liquid cleaning agents in which the concentration of a surfactant is increased and the amount of resin in a container is reduced are preferred and used. In addition, body cleaners and liquid detergents for washing dishes are anionic surfactants such as polyoxyalkylene alkyl ether sulfate surfactants (hereinafter referred to as AES) from the viewpoint of detergency and hand roughening. Many) are used as the main component. It is known that dishwashing detergents use alkane sulfonate as a foam-increasing agent in addition to AES from the standpoint of foaming properties and foam retention. Furthermore, it is known that carboxylic acid compounds are used for improving detergency. For example, Patent Documents 1 to 3 describe that a composition having excellent foaming properties can be provided by using an alkanesulfonate. Patent Document 4 describes that a composition having excellent detergency can be provided by using a compound having a carboxylic acid group.
JP 2001-294894A, JP 2004-196987 A JP 2007-332305 A JP 2001-172697 A

In addition to reducing environmental impact, as described above, today, the problem of global warming, such as numbers of targets of CO ₂ emission reduction is imposed, there has been a growing momentum of CO ₂ emissions, CO ₂ emissions Natural raw materials are attracting attention because of the reduction in the amount of fossil fuel used and the concept of carbon neutral.

  In general, AES made from linear alcohols obtained from natural fats and oils is a surfactant that adsorbs on hard surfaces such as tableware, although it has good cleaning properties and foaming properties due to good packing properties between alkyl groups. The adsorbed film is hard, and there is a problem with null-thickness during rinsing.

  Therefore, the object of the present invention is to use a linear alcohol, for example, an alcohol obtained from natural fats and oils, as a raw material alcohol for AES, while being excellent in cleaning performance and foaming property, and also excellent in the ease of removal of nulls during rinsing. It is to provide a cleaning composition.

  In order to apply a polyoxyalkylene alkyl ether sulfate ester surfactant (AES) having a linear alkyl group derived from a natural raw material to a liquid detergent, the present inventors have been able to wash AES having a linear alkyl group. The behavior was examined in detail. As a result, in the production of oxyalkylene alkyl ether sulfate salts, the present inventors reduced propylene oxide to a small amount of alcohol first, thereby reducing unreacted alcohol, and then adding ethylene oxide. It has been found that excellent foaming properties and ease of removal of nulls during rinsing can be obtained while maintaining the cleaning performance.

That is, the present invention is (a) a mixture containing a compound represented by the following general formula (1), wherein the average added mole number m of propylene oxide and the average added mole number n of ethylene oxide in the mixture are respectively Alkanesulfonic acid type surfactant having a hydrocarbon group having 4 to 50% by mass and (b) a hydrocarbon group having 10 to 21 carbon atoms, wherein 0 <m <1, 0 <n ≦ 3 (hereinafter referred to as component (a)) 1 to 15% by mass of an agent (hereinafter referred to as component (b)), (c) a hydroxycarboxylic acid having 2 to 8 carbon atoms or a salt thereof (hereinafter referred to as component (c)) to 0.1 to 3% by mass, The present invention relates to a liquid detergent composition containing a phase stabilizer selected from (d) a hydrotrope agent (hereinafter referred to as component (d)) and (e) an organic solvent (hereinafter referred to as component (e)), and water.
R ^1a O— (PO) _m1 (EO) _n1 SO ₃ M (1)
(In the formula, R ^1a is a linear alkyl group having 8 to 18 carbon atoms, and the carbon atom bonded to the oxygen atom is the first carbon atom, and PO and EO are a propyleneoxy group and an ethyleneoxy group, respectively. And m1 and n1 represent the added mole number of PO or EO, each of which is an integer of 0 or more, and M is a cation.)

  The liquid detergent composition of the present invention uses natural raw materials as raw material alcohol of AES, that is, raw materials in which the raw material alcohol is occupied by a compound having a linear alkyl group, without impairing cleaning performance and foamability. In the case of rinsing, an effect that it is easy to remove a null tone is expressed.

First, each component contained in the liquid detergent composition of the present invention will be described.
The component (a) of the present invention is a mixture containing a compound represented by the following general formula (1), and the average added mole number m of propylene oxide and the average added mole number n of ethylene oxide in the mixture are respectively 0 <m <1, 0 <n ≦ 3.
R ^1a O— (PO) _m1 (EO) _n1 SO ₃ M (1)
(In the formula, R ^1a is a linear alkyl group having 8 to 18 carbon atoms, and the carbon atom bonded to the oxygen atom is the first carbon atom, and PO and EO are a propyleneoxy group and an ethyleneoxy group, respectively. And m1 and n1 represent the added mole number of PO or EO, each of which is an integer of 0 or more, and M is a cation.)

As the component (a) of the present invention, a surfactant derived from a natural alcohol can be used. Therefore, R ^1a is a straight chain, and a naturally occurring alcohol has a hydroxy group at its end, Since propylene oxide or ethylene oxide is added, the carbon atom of R ^1a bonded to the oxygen atom of propylene oxide or ethylene oxide is the first carbon atom. Of course, in the case of alkyl sulfates or salts, the hydroxy group at the terminal of R ^1a is sulfated, which likewise becomes the first carbon atom.

  m and n are the average number of moles added in the mixture of the compound calculated from m1 and n1 of the compound represented by the general formula (1). By the way, in producing the compound of component (a), in the present invention, it is important to first add propylene oxide. Addition of propylene oxide contributes to the reduction of alkyl sulfate salts that are thought to particularly affect null-sticking. In addition, by adding propylene oxide, a pseudo-branched chain is exhibited in the structure, and it is considered that an effect close to that of a branched-chain alkyl group contained in the synthetic alcohol is exhibited. Increasing the addition rate of propylene oxide decreases the content of alkyl sulfate ester salt, but the proportion of the pseudo-branched structure by propylene oxide increases, so the packing property between the surfactants is three-dimensional. It shows a tendency to decrease due to an obstacle and to decrease cleaning power. Therefore, in order to obtain sufficient rinsing properties and detergency, the average added mole number of propylene oxide represented by m is less than 1, preferably the lower limit is 0.1 or more, more preferably 0.15 or more. The upper limit is preferably 0.8 or less, more preferably 0.6 or less.

  In the component (a) of the present invention, propylene oxide (hereinafter sometimes referred to as PO) is added, and then ethylene oxide (hereinafter sometimes referred to as EO) is added. And those obtained by adding 2 moles, that is, the compounds of n1 = 1 and n1 = 2 among the compounds represented by the general formula (1) are most effective in terms of cleaning performance. Therefore, it is desirable to add ethylene oxide so that the ratio of 1 mol and 2 mol becomes high. Therefore, in the present invention, the average added mole number n of EO is preferably 2.5 or less, more preferably 2.3 or less, and most preferably 2 or less. The lower limit of n is preferably 0.5 or more, more preferably 1 or more.

  Hereinafter, m1 and n1 in the general formula (1) will be described. The compound of the general formula (1) shows the structure of each compound constituting the component (a), and 0 <m <1, as a mixture including the compound represented by m1 = 0 and / or n1 = 0. The component (a) is configured so that 0 <n ≦ 3.

  When making PO react with alcohol, PO tends to react with unreacted alcohol rather than reacting after PO once reacted with alcohol. Therefore, when PO is reacted at a ratio of m <1, a large amount of m1 = 1 compounds are produced, and a small amount of m1 ≧ 2 is produced. In particular, when PO is reacted at a ratio of m ≦ 0.6, the production of a compound of m1 ≧ 2 is easily suppressed to 15% by mass or less, particularly 10% by mass or less. Care should be taken in selecting the catalyst to limit compounds with m1 ≧ 2. In addition, as a method of reliably suppressing the formation of the compound of m1 ≧ 2, a method of adding PO in the presence of excess alcohol can be considered. In this case, it is necessary to remove excess unreacted alcohol by distillation before reacting EO.

  Therefore, in the present invention, the ratio of the compound of m1 = n1 = 0 in the component (a), that is, the alkylsulfuric acid ester or a salt thereof, is preferably 28% by mass or less in order to reduce luster during rinsing. More preferably, it is 26 mass% or less, Most preferably, it is 24 mass% or less.

  In addition, the component (a) of the present invention is preferably 15% by mass or less, more preferably 10% by mass or less in the component (a) in order that the content of the compound of m1 ≧ 2 obtains an excellent detergency. It is.

  As a compound constituting the component (a), an oxypropylene alkyl ether sulfate ester or a salt thereof, that is, a compound having m1 = 1 and n1 = 0 is used to reduce luster during rinsing. Preferably it is 4-50 mass%, More preferably, it is 10-40 mass%.

  Furthermore, in the present invention, as described above, as the compound constituting the component (a), it is preferable that there are many compounds having 1 or 2 ethylene oxide groups. Therefore, the compound of n1 = 1 and n1 = 2 is preferably 25 to 45% by mass, more preferably 28 to 40% by mass in the component (a). The compound in the remaining component (a) is a compound having n1 of 3 or more.

  The upper limit of m1 is preferably 3 or less, and therefore component (a) is preferably composed of a compound of 0 ≦ m1 ≦ 3. Further, the upper limit of n1 is preferably 10 or less, and therefore component (a) is preferably composed of a compound of 0 ≦ n1 ≦ 10. In the present invention, in particular, a compound of 0 ≦ n1 ≦ 5 in terms of detergency Is a mixture occupying 85% by mass or more of the component (a).

M in the general formula (1) is a cation group that forms a salt, and examples thereof include alkali metal ions, —N ⁺ H ₄ (ammonium ions), and alkanol ammonium groups such as a monoethanol ammonium group. Examples of the alkali metal include sodium, potassium, and lithium. Among these, sodium and potassium are more preferable.

  In addition, in this invention, description (mass% and mass ratio) regarding the mass which concerns on (a) component is mass (in acid conversion) when M in the general formula (1) of (a) component is assumed to be a hydrogen atom. Ratio).

  The component (a) may contain a compound that is not sulfated in the production thereof, but in the present invention, the compound is treated as a nonionic surfactant.

The component (a) can be produced as follows.
Step (I): Step of adding propylene oxide to linear primary alcohol Step (II): Step of adding ethylene oxide to the propylene oxide adduct obtained in the above step (I) Step (III): Step of above ( Step of sulfating and then neutralizing the alkoxylate obtained in II)

  In step (I), propylene oxide is added to a linear primary alcohol having 8 to 18 carbon atoms, and the addition ratio is propylene having a ratio represented by m in the general formula (1) per mole of alcohol. Add the oxide.

  In the step (II), ethylene oxide is added to the propylene oxide adduct obtained in the above step (I), and the ratio of addition is the ratio represented by n in the general formula (1) per mole of alcohol. Of ethylene oxide is added.

  As a method for carrying out the steps (I) and (II), a conventionally known method can be used. That is, an autoclave is charged with 0.5 to 1 mol% of KOH as a catalyst, and the temperature is increased and dehydrated, and a predetermined amount of propylene oxide and ethylene oxide are added at a temperature of about 120 to 160 ° C. Can be manufactured. At this time, the addition form is block addition, and propylene oxide addition [step (I)] and ethylene oxide addition [step (II)] are performed in this order. The autoclave to be used is preferably provided with a stirring device, a temperature control device, and an automatic introduction device.

  Step (III) is a step of sulfating and then neutralizing the alkoxylate obtained in the above step (II). Examples of the sulfation method include methods using sulfur trioxide (liquid or gas), sulfur trioxide-containing gas, fuming sulfuric acid, chlorosulfonic acid, and the like, and particularly prevent the generation of waste sulfuric acid and waste hydrochloric acid. From the viewpoint, a method in which sulfur trioxide is continuously supplied in a gaseous or liquid state simultaneously with the alkoxylate is preferable.

  As a method for neutralizing the sulfate, batch type, which performs neutralization while adding and stirring the sulfate to a predetermined amount of neutralizer, and continuously supplying the sulfate and neutralizer into the pipe, stirring and mixing Examples include a loop type in which neutralization is performed by a machine, but the neutralization method is not limited in the present invention. Examples of the neutralizing agent used here include an aqueous alkali metal solution, aqueous ammonia, and triethanolamine, but an aqueous alkali metal solution is preferred, and sodium hydroxide is more preferred.

  Component (b) of the present invention is an alkanesulfonic acid type surfactant having a hydrocarbon group having 10 to 21 carbon atoms, preferably an alkanesulfonic acid salt having 13 to 18 carbon atoms, Secondary alkane sulfonate (a compound in which the carbon atom to which the sulfone group is bonded is a secondary carbon atom) is more preferred because of its availability. Examples of the alkane sulfonate include alkali metal salts, ammonium salts, and alkanolamine salts such as sodium, potassium, lithium, ammonium, and mono-, di-, and triethanolamine salts. (B) A component can be used individually or in mixture of 2 or more types. The component (b) improves the foam increasing property. The component (a) has a watery foam quality compared to AES having a branched alkyl group, in other words, the amount of foam when foamed with a sponge tends to decrease, but the component (b) is used in combination. It will be improved.

  The component (c) of the present invention is a hydroxycarboxylic acid having 2 to 8 carbon atoms or a salt thereof. Examples of the hydroxycarboxylic acid having 2 to 8 carbon atoms include glycolic acid, citric acid, lactic acid, tartaric acid, malic acid, and glucone. An acid, carboxymethyl tartaric acid, etc. are mentioned, In this invention, 1 or more types chosen from a citric acid, glycolic acid, lactic acid, tartaric acid, and malic acid are preferable.

  These hydroxycarboxylic acid salts are preferably alkali metal salts, alkaline earth metal salts or alkanolamine salts, with sodium and potassium being preferred as the alkali metal and magnesium being preferred as the alkaline earth metal. The alkanolamine is preferably monoethanolamine, diethanolamine or triethanolamine. (C) A component can be used individually or in mixture of 2 or more types.

  (C) A component is a component mix | blended from a viewpoint which improves foam increase property, without impairing rinse property.

  The liquid detergent composition of the present invention contains a phase stabilizer selected from (d) a hydrotrope agent and (e) an organic solvent.

  As the hydrotrope agent of component (d), alkylbenzene sulfonates having 1 to 3 alkyl groups having a maximum carbon number of 3 or less are preferred, specifically toluene sulfonic acid, xylene sulfonic acid, and cumene sulfonic acid, In addition, these sodium, potassium or magnesium salts are preferable, and p-toluenesulfonic acid is particularly preferable.

  As the organic solvent for component (e), first, (i) an alcohol having 1 to 3 carbon atoms, (ii) a glycol or glycerin having 2 to 4 carbon atoms, and (iii) a dialkyl having 2 to 4 carbon atoms in an alkylene glycol unit. Or, trialkylene glycol, (iv) monoalkoxy (methoxy, ethoxy, propoxy, butoxy) or phenoxy or benzooxy ether of di- or tetra-alkylene glycol having 2 to 4 carbon atoms in the alkylene glycol unit.

  Specifically, (i) is ethanol, isopropyl alcohol, (ii) is ethylene glycol, propylene glycol, glycerin, isoprene glycol, (iii) is diethylene glycol, dipropylene glycol, (iv) is propylene glycol monomethyl ether , Propylene glycol monoethyl ether, diglycol monobutyl ether, phenoxyethanol, phenoxytriethylene glycol, and phenoxyisopropanol, and a water-soluble organic solvent selected from these is preferable. In particular, ethanol, propylene glycol, dipropylene glycol, butyl diglycol, phenoxyethanol, phenyl glycol, and phenoxyisopropanol are preferable.

  Moreover, polyalkylene glycol can be used as an organic solvent. Polyalkylene glycol is useful as an anti-gelling agent [hereinafter sometimes referred to as component (e-1)], for example, an anti-gelling polymer described in JP-A-11-513067, particularly polypropylene. It is preferable to blend glycol from the viewpoint of viscosity control and storage stability. Polypropylene glycol preferably has a weight average molecular weight of 600 to 5000, more preferably 1000 to 4000. The weight average molecular weight can be determined using a light scattering method, and a dynamic light scattering photometer (DLS-8000 series, Otsuka). It can be measured by an electronic company etc.).

  Further, for the purpose of suppressing the formation of a polymer film of the activator that can be formed at the gas-liquid interface of the cleaning composition, an ethylene oxide adduct of glycerin (the average number of moles of added ethylene oxide is preferably 5 to 120) (e-1). You may mix | blend as a component.

  The liquid detergent composition of the present invention has, as other components, an amine oxide type having a hydrocarbon group having 8 to 18 carbon atoms and an alkyl group having 1 to 3 carbon atoms or a hydroxyalkyl group having 1 to 3 carbon atoms. One or more surfactants selected from surfactants, nonionic surfactants, amphoteric surfactants, and anionic surfactants other than component (a) and component (b) [hereinafter, (f) Ingredients. ] In combination is preferable in terms of foamability and detergency.

  In the liquid detergent composition of the present invention, as other components, for example, antibacterial / antifungal agents known under trade names such as proxel and caisson, disinfectants such as zinc salts, silver salts, polylysine, phenoxyethanol, sulfuric acid Water-soluble inorganic salts such as magnesium, reducing agents such as sulfites, antioxidants such as BHT and ascorbic acid, thickening polymers such as xanthan gum, guar gum and carrageenan, polymer dispersants such as polyacrylic acid polymers, Compounds known to be incorporated in liquid detergents such as enzymes such as protease, amylase and lipase, foaming agents, coloring agents, and fragrances can be incorporated.

  In the liquid detergent composition of the present invention, the balance is water, which is essentially an essential component. In view of liquid stability, water is preferably distilled water or ion-exchanged water.

  Next, the blending ratio of the above components in the liquid detergent composition of the present invention will be described. In the present invention, the concentration of a compound blended as an organic salt is limited to the concentration assumed to be an acid type unless otherwise specified.

(A) component of this invention is 4-50 mass% in a composition, Preferably it is 10-40 mass%, More preferably, 10-30 mass% is contained. From the viewpoint of detergency, it is not less than the lower limit value and from the viewpoint of low temperature stability, it is not more than the upper limit value. The content of the component (a) is a concentration when M in the general formula (1) is assumed to be a hydrogen atom.

  (B) A component is 1-15 mass% in a composition, Preferably it is 1-10 mass%, More preferably, it is 1.5-7 mass%, More preferably, 2-7 mass% is contained. It is above the lower limit on foaming properties, and below the upper limit on the ease of removal of nulls when rinsing.

  Content in the composition of the hydroxycarboxylic acid which is (c) component of this invention or its salt is 0.1-3 mass%, Preferably it is 0.1-2 mass%, More preferably, it is 0.2-1. % By mass.

  Content in the composition of the hydrotrope agent which is (d) component of this invention becomes like this. Preferably it is 1.5-10 mass%, More preferably, it is 2-7.5 mass%.

  The content in the composition of the organic solvent which is the component (e) of the present invention is preferably 0 to 30% by mass, more preferably 1.5 to 15% by mass, excluding (e-1) described later. %. The content of ethanol in the composition is preferably 0 to 7.5% by mass, and the other solvent is one or more selected from propylene glycol, dipropylene glycol, butyl diglycol, phenoxyethanol, phenyl glycol, and phenoxyisopropanol. However, the total amount of one or more solvents selected from propylene glycol, dipropylene glycol, butyl diglycol, phenoxyethanol, phenyl glycol, and phenoxyisopropanol is 0 to 25% by mass in the composition. be able to.

  Moreover, content in the composition of the antigelling polymer which is (e-1) component among (e) component becomes like this. Preferably it is 0-5 mass%, More preferably, it is 0-3 mass%. In the case of polypropylene glycol, it is preferable to add 0 to 2% by mass in the composition.

  Although the water of the present invention is the balance, it is blended in an amount of not more than 85% by mass and 80-30% by mass in consideration of other components in the composition.

  The component (f) is preferably contained in the composition in an amount of 5 to 25% by mass, more preferably 5 to 20% by mass, and N-alkyl-having a linear alkyl group having 10 to 18 carbon atoms from the viewpoint of emulsifying power. N, N-dimethylamine oxide or fatty acid (10 to 18 carbon atoms) amidopropyl-N, N-dimethylamine oxide is preferable, and it is preferable to contain 1 to 30% by mass of these amine oxide type surfactants. The mass ratio of the component a) to the amine oxide type surfactant is preferably 20/1 to 1/1. Furthermore, it is preferable from the point of emulsifying power / foaming power that 0.5 to 15% by mass of a nonionic surfactant is contained in the composition, and 2 to 15% by mass of an amphoteric surfactant is contained. It is preferable in terms of power.

  In this invention, it is preferable that the total amount of surfactant including (a) component, (b) component, and (f) component is 10-60 mass%, and also 10-50 mass. Moreover, it is preferable that the ratio of the sum total of (a) component and (b) component with respect to all the surfactants is 40-90 mass%, and also 40-85 mass.

  In addition, pH of the liquid cleaning composition of this invention is 4.5-9 at 25 degreeC, Preferably it is 5.5-8. Considering that the component (a) is acidic and unstable, and that the amine oxide of the component (f) changes the degree of cationization with pH, the lower limit is determined in terms of detergency, and foaming properties The upper limit is determined at this point. When adjusting pH to acid, in addition to inorganic acids such as hydrochloric acid and sulfuric acid, chelating agents such as citric acid and hydrotropes may be used. A metal hydroxide may be used. In addition, pH is measured by the method of the below-mentioned Example.

  The viscosity of the liquid detergent composition of the present invention is preferably 10 to 1000 mPa · s, more preferably 25 to 500 mPa · s, from the viewpoint of liquid dischargeability. The viscosity is measured with a Brookfield viscometer at 20 ° C. The rotor is no. 2 is used and rotated at a rotational speed of 60 r / min, and the viscosity 60 seconds after the start of rotation is defined as the viscosity of the liquid detergent composition.

<Examples 1-8 and Comparative Examples 1-7>
A liquid detergent composition was prepared using the following component (a) and the components shown in Table 2. At that time, the pH was adjusted using 48% sodium hydroxide (shown as “+” in Table 1). The measuring method of pH is as follows. After the adjustment, the cleaning power of these compositions was evaluated by the following method. The results are also shown in Table 2. In addition, the component (a) used [including some comparative compounds] is as follows.
ES1: 0.4 mol of PO and 1.5 mol of EO are added to natural alcohol having an alkyl chain of C ₁₂ : C ₁₄ = 73: 27 (mass ratio), and then sulfated with sulfur trioxide, water Neutralized with sodium oxide (10% diluted with water until neutralized to pH 11).
ES2: 0.6 mol of PO and 1.5 mol of EO were added to natural alcohol having an alkyl chain of C ₁₂ : C ₁₄ = 73: 27 (mass ratio), and then sulfated with sulfur trioxide, water Neutralized with sodium oxide (10% diluted with water until neutralized to pH 11).
· ES3: alkyl chain derived alcohol of C _12, 0.4 mol addition of PO, After 2.0 mols of EO, sulfated with sulfur trioxide, and neutralized with sodium hydroxide (10% in water It was neutralized until the pH of the diluted one was 11.)
ES4: 2.0 mol of EO was added to natural alcohol having an alkyl chain of C ₁₂ : C ₁₄ = 73: 27 (mass ratio), then sulfated with sulfur trioxide and neutralized with sodium hydroxide (water Neutralized until diluted to 10% with 10% dilution)
ES5: 4.0 moles of EO added to natural alcohol with C ₁₂ alkyl chain, then sulfated with sulfur trioxide and neutralized with sodium hydroxide (pH of 11 diluted with water is 11) Neutralized).
Details of ES1 to ES5 are shown in Table 1. The natural alcohol described above is composed only of a compound having a linear alkyl group.

<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.

  A sample (liquid detergent composition) 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.

<Detergency test>
1 g of model oil stain in which 0.1% by weight of pigment (stan red) is uniformly mixed with rapeseed oil and a polypropylene dish (C-39 PP meat dish made by Kanto Plastic Industry Co., Ltd.) Model contaminated tableware. A commercially available sponge (Sumitomo 3M: Scotch Bright) was impregnated with 2.0 g of the liquid detergent composition shown in Table 2 and 30 g of tap water and foamed by hand 2-3 times. Using this, the model-contaminated dishes were scrubbed, and the oil stain removal property was evaluated from the number of dishes that could be washed. Whether or not the washing was possible was judged by the presence or absence of coloring derived from oil stains remaining on the surface of the polypropylene dish after washing.

<Foamability test>
A commercially available sponge (Sumitomo 3M Co., Ltd .: Scotch Bright) was impregnated with 0.3 g of the liquid detergent composition shown in Table 2 and 30 g of tap water at 25 ° C., and foamed on a non-stained ceramic dish by the following procedure. The foam on the earthenware dish was collected in a measuring cylinder while taking care not to cause further foaming with ion-exchanged water, and the amount of foam was measured from the difference in the scale of the foam part. This experiment was performed twice for one sample, and the average value was taken as the amount of foam in the sample.

(Bubbling procedure with sponge)
(I) First rub the sponge once and then rub the pottery plate 5 times clockwise.
(Ii) After the operation of (i), squeeze the sponge once again, and rub the ceramic dish 5 times counterclockwise.
(Iii) After the operation in (ii), squeeze the sponge once again and remove the sponge from the ceramic dish with the sponge squeezed.

<Rinseability test>
3 pieces of the liquid detergent composition listed in Table 2 on a polypropylene dish (Kanto Plastic Industry Co., Ltd., C-39 PP meat dish) and lightly stretched with fingers on the entire dish. / Prepare a sample. The three dishes were rinsed with tap water (25 ° C.) having a flow rate of 5 L / min, and the rinsing time required until the null derived from the cleaning agent disappeared was measured with a stopwatch. This experiment was performed twice for one sample, and the average value was defined as the rinsing time required to rinse the sample.

The components in the table are as follows.
SAS: secondary alkanesulfonic acid sodium salt (carbon number 13 to 17) [product name manufactured by Clariant; HOSTAPUR SAS60]
AO: N-lauryl-N, N-dimethylamine oxide Sulfobetaine: Lauryl dimethyl sulfobetaine AG: Mixing of alkyl group composition of C ₈ / C ₁₀ / C ₁₂ = 50/35/15 (mass ratio) Alkyl glucoside with an average degree of condensation of glucoside of 1.3

Claims (1)

(A) A mixture containing a compound represented by the following general formula (1), wherein the average addition mole number m of propylene oxide and the average addition mole number n of ethylene oxide in the mixture are 0 <m <1, 4 to 50% by mass of a mixture satisfying 0 <n ≦ 3, (b) 1 to 15% by mass of an alkanesulfonic acid type surfactant having a hydrocarbon group having 10 to 21 carbon atoms, and (c) 2 to 2 carbon atoms. A liquid detergent composition comprising 0.1 to 3% by mass of 8 hydroxycarboxylic acid or a salt thereof, (d) a phase stabilizer selected from a hydrotrope agent and (e) an organic solvent, and water.
R ^1a O— (PO) _m1 (EO) _n1 SO ₃ M (1)
(In the formula, R ^1a is a linear alkyl group having 8 to 18 carbon atoms, and the carbon atom bonded to the oxygen atom is the first carbon atom, and PO and EO are a propyleneoxy group and an ethyleneoxy group, respectively. And m1 and n1 represent the added mole number of PO or EO, each of which is an integer of 0 or more, and M is a cation.)