JP2001181679A - Solid detergent composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the solubility of a solid detergent composition by inhibiting the reduction of the solubility of the detergent caused by the contact of a surfactant with water to form a hexagonal liquid crystal. SOLUTION: This solid detergent composition is characterized by containing the surfactant capable of forming the hexagonal liquid crystal on mixing with water and a component for inhibiting the formation of the hexagonal liquid crystal due to the surfactant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a solid detergent composition, and more particularly to a solid detergent composition having improved solubility by suppressing the formation of a hexagonal liquid crystal phase when a surfactant comes into contact with water.

[0002]

2. Description of the Related Art Recently, a centrifugal washing machine has attracted attention because of its high effect of preventing damage caused by entanglement of clothes.
However, unlike the pulsator method, the centrifugal force method has a mild flow pattern of the contents (laundry and detergent) and has a structure in which water passes through the gaps between the fibers. It has been found that the fine dissolution residue of the detergent tends to increase. Specifically, after washing and rinsing, the fine detergent insoluble matter is not observed with the naked eye due to the effect of the refractive index because it is wet with water, but when observed after drying the laundry, fine white spot-like insoluble matter is observed. Many are present in the interstices of the fibers, and are particularly conspicuous in dark-colored clothing. Also, more detergent aggregates are observed than in the pulsator system.

[0003]

Usually, many surfactants form a hexagonal liquid crystal phase in a certain concentration range when they come into contact with cold water, and once the surfactant forms this liquid crystal structure, a strong stirring force is applied. It is difficult to dissolve unless otherwise. Therefore, especially in a centrifugal washing machine having a mild flow pattern of the contents, the solubility of the detergent tends to decrease due to the formation of the hexagonal liquid crystal phase of the surfactant. This phenomenon is particularly remarkable in a solid detergent containing a nonionic surfactant as a main component. Therefore, an object of the present invention is to improve the solubility of a solid detergent composition by suppressing a decrease in the solubility of a detergent due to the formation of a hexagonal liquid crystal phase of a surfactant.

[0004]

The object of the present invention is to provide a surfactant comprising a surfactant which forms a hexagonal liquid crystal phase when mixed with water, and a component which suppresses the formation of the hexagonal liquid crystal phase of the surfactant. This can be solved by a solid detergent composition that is characterized.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail. (1) In the present invention, a surfactant that forms a hexagonal liquid crystal phase when mixed with water generally has a molecular structure in which a hydrophobic group is a single-chain type and a hydrophilic group (polar group) is large. Specifically, when the molecular volume of the surfactant is V, the length of the hydrophobic group is L, and the molecular occupation area of the hydrophilic group is S, the following formula (I) is satisfied. V / (S × L) = 1/3 to 1/2 (I)

A specific example will be described below. (1-a) polyoxyethylene alkyl (or alkenyl) ether type nonionic surfactant: an average of 5 to ethylene oxide (hereinafter sometimes abbreviated as EO) in a fatty alcohol having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms. ~ 30
Moles, preferably 6 to 25 moles, and satisfy the above formula (I). (1-b) Fatty acid alkyl ester ethoxylate type nonionic surfactant represented by the following chemical formula (i): R ₁ CO (EO) _n OR ₂ ... (i) In the chemical formula (i), EO is ethylene oxide, R ₁ C
O is a fatty acid residue having 6 to 22 carbon atoms, preferably 8 to 18 carbon atoms, R ₂ is a lower alkyl group having 1 to 3 carbon atoms which may have a substituent, n is 5 to 30, preferably 6 to 25. Is satisfied and satisfies the above formula (I). (1-c) polyoxyethylene alkyl (or alkenyl) ether sulfate-type anionic surfactant: polyoxyethylene alkyl (or alkenyl) ether obtained by adding an average of 0.5 to 8 moles of ethylene oxide to a fatty alcohol having 6 to 22 carbon atoms An alkali metal salt obtained by sulphating a nonionic surfactant and satisfying the above formula (I). (1-d) alkyl (or alkenyl) benzene sulfonic acid type anionic surfactant: an alkali metal salt of sulfonated alkyl (or alkenyl) benzene having 8 to 16 carbon atoms and satisfying the above formula (I) What to do.

(1-e) alkyl (or alkenyl) sulfate type anionic surfactant: an alkali metal salt obtained by sulfated alcohol having 10 to 20 carbon atoms;
And satisfying the above formula (I). (1-f) α-olefin sulfonic acid type anionic surfactant: an alkali metal salt of sulfonated α-olefin having 10 to 20 carbon atoms, and the above formula (I)
That satisfy you. (1-g) α-sulfo fatty acid lower alkyl ester type anionic surfactant: an alkali metal salt obtained by sulfonating a fatty acid ester having 10 to 20 carbon atoms and satisfying the above formula (I). (1-h) alkylcarboxylic acid type anionic surfactant:
An alkali metal salt of a higher fatty acid having 10 to 20 carbon atoms and satisfying the above formula (I). The solid detergent composition of the present invention may contain any one of these surfactants, or may use a mixture of two or more thereof. Further, among these surfactants, nonionic surfactants such as the above-mentioned (1-a) and (1)
-B) has a large effect of suppressing the formation of a hexagonal liquid crystal phase by adding a component that suppresses the formation of a hexagonal liquid crystal phase described later.

(2) The component for suppressing the formation of a hexagonal liquid crystal phase in the present invention is obtained by X-ray diffraction analysis or polarization microscope observation of a mixed solution obtained by mixing this component with a surfactant for forming a hexagonal liquid crystal phase. Analyze,
The phase of this mixed solution is not identified as a hexagonal phase. Specifically, when a sample obtained by mixing a surfactant that forms a hexagonal liquid crystal phase and a component that suppresses the formation of a hexagonal liquid crystal phase is analyzed by X-ray diffraction, the ratio of the long plane spacing is 1: 1/1. When the ratio is 3: 1/4: 1/7, the phase of this sample is identified as a hexagonal liquid crystal phase. Alternatively, if a fan-shaped structure is observed when a similar sample is observed with a polarizing microscope, the phase of this sample is identified as a hexagonal liquid crystal phase (Liquid Crystals and Bicrystal).
biological Structures (1979)). As a simpler test method, the presence or absence of a hexagonal liquid crystal phase can also be determined by measuring the viscosity of a mixed solution of a surfactant that forms a hexagonal liquid crystal phase and a component that suppresses the formation of a hexagonal liquid crystal phase. You can judge. Specifically, first, after mixing a surfactant that forms a hexagonal liquid crystal phase and a component that suppresses the formation of a hexagonal liquid crystal phase at an arbitrary ratio, 5 g of water is added to 100 g of the mixed solution, and the viscosity at 25 ° C. Is measured with a Brookfield type viscosity. This operation is performed when the total amount of water added is 1000 g.
Repeat until. Separately, the viscosity is measured by performing the same operation on a solution of a surfactant alone that forms the same hexagonal liquid crystal phase. Then, the measurement result of the obtained viscosity is plotted on the X-axis with the water content (%) of the surfactant solution and the Y-axis.
The axis is plotted as viscosity (P), and the height H of the peak at which the viscosity rapidly increases is observed and compared with the peak height H 'when the surfactant alone forming the hexagonal liquid crystal phase is tested. Compared to the peak height H ′ of the solution containing only the surfactant,
The effect of suppressing the formation of the hexagonal liquid crystal phase is greater as the peak height H is changed to be lower by using the mixed solution. The lower the peak height H of the mixed solution is, the more preferable it is.
Most preferably, there is no peak of the mixed solution.

Hereinafter, specific examples of the component for suppressing the formation of a hexagonal liquid crystal phase in the present invention will be described. (2-a) A fatty alcohol having 8 to 22 carbon atoms, preferably 10 to 18, more preferably a branched chain, and ethylene oxide in an average of 0.5 to 4.5 mol, preferably 1 to 1 mol.
4 moles of polyoxyethylene alkyl (or alkenyl) ether. (2-b) An average of 5 to 15 mol, preferably 6 to 12 mol of ethylene oxide, and propylene oxide (hereinafter referred to as PO and Polyoxyethylene polyoxypropylene alkyl (or alkenyl) ether to which 2 to 8 moles, and preferably 3 to 6 moles are added on average. (2-c) Polyoxyethylene polyoxypropylene glycol obtained by condensing ethylene oxide on average of 10 to 25 mol, preferably 12 to 23 mol, and propylene oxide on average of 15 to 25 mol, preferably 17 to 24 mol. (2-d) A fatty alcohol having 8 to 22 carbon atoms, preferably 10 to 18 carbon atoms, and more preferably a branched chain. The solid detergent composition of the present invention may contain any one of these components that suppress the formation of a hexagonal liquid crystal phase,
Two or more kinds may be used in combination.

As for the above (2-a) and (2-b), those having a narrow addition mole distribution of ethylene oxide or prolene oxide are effective, and those having a wide addition mole distribution are effective for the hexagonal liquid crystal phase. The formation suppressing effect cannot be obtained. Specifically, in each of the substances (2-a) or (2-b) (100% by mass), the average addition mole number of ethylene oxide or prolene oxide is n.
When the number of moles of added ethylene oxide or prolene oxide is n, it is 10% by mass or more, preferably 15% by mass or more.
% Or more, more preferably 20% by weight or more, and the upper limit is 83% by weight.
% By mass, preferably 10 to 15% by mass, more preferably 15 to 20% by mass, and those having an addition mole number of n ± 2 are 8% by mass or more, preferably 9 to 14% by mass, more preferably 10 to 13% by mass and those having an addition mole number of n ± 5 are 3% by mass or less, preferably 2% by mass or less, particularly preferably 1% by mass or less, and the lower limit is 0% by mass. You.

The solid detergent composition of the present invention uses a surfactant that forms a hexagonal liquid crystal phase as a part or all of a surfactant as a detergent component, and suppresses the formation of a hexagonal liquid crystal phase of the surfactant. It is the one to which the components were added. A surfactant that forms a hexagonal liquid crystal phase may be used in combination with another surfactant. The solid detergent composition may be in the form of a powder, or may be formed into an appropriate shape such as a tablet, a briquette, or a sheet. In the present invention, the addition amount of the component that suppresses the formation of the hexagonal liquid crystal phase may be generally within the range in which it can be determined that the liquid crystal phase is not formed by the method for examining the presence or absence of the hexagonal liquid crystal phase. Is in the range of 30 (mass ratio) with respect to 100 mass of the surfactant forming the hexagonal liquid crystal phase. If the addition amount of the component for suppressing the formation of the hexagonal liquid crystal phase is smaller than this, the solubility is undesirably reduced. The combination of the surfactant that forms the hexagonal liquid crystal phase and the component that suppresses the formation of the hexagonal liquid crystal phase, which is contained in the solid detergent composition, is optional. a) and / or (1)
-B) with respect to the nonionic surfactant,
This is the case where b) and / or (2-a) are added.

The solid detergent composition of the present invention may contain, in addition to a surfactant and a component for suppressing the formation of a hexagonal liquid crystal phase, the following components which are usually contained in a detergent. Can be. (1) Detergent builder As a detergent builder, an alkali builder or a chelate builder usually used for a detergent is preferably used. (A) As alkali builders, sodium carbonate, sodium hydrogen carbonate, potassium carbonate, potassium hydrogen carbonate,
Alkali metal carbonates such as sodium potassium carbonate,
Examples include alkali metal silicates such as sodium silicate, potassium silicate, and layered sodium silicate. (B) Examples of the chelate builder include aluminosilicate, tripolyphosphate, pyrophosphate, citrate, succinate, polyacrylate, acrylic acid-maleic acid copolymer, iminocarboxylic acid / salt, EDTA, etc. Is mentioned.

(2) Oil-absorbing carrier The oil-absorbing carrier is mainly used for absorbing and supporting a liquid component such as a nonionic surfactant. Preferred oil-absorbing carriers include, for example, as silicate compounds, amorphous hydrous amorphous silicic acid, spherical porous hydrous amorphous silicic acid, amorphous anhydrous amorphous silicic acid, petal-like hydrous amorphous calcium silicate, and acicular hydrous amorphous silica. Examples include amorphous calcium silicate, amorphous aluminosilicate, and magnesium silicate. Examples of the carbonate compound include magnesium carbonate and calcium carbonate.

(3) Clay Minerals As the clay minerals, those belonging to the smectite group and having a three-layer structure of dioctahedral or trioctahedral are preferred. The oil absorption is less than 80 ml / 100 g, preferably 30 to 70 g.
ml / 100 g, the bulk density is 0.1 g / ml or more,
Preferably, it is 0.2 to 1.5 g / ml.
Specific examples thereof include, for example, montmorillonite, nontronite, beidellite, and pyrophyllite as clay minerals having a dioctahedral type three-layer structure. Examples of the clay mineral having a trioctahedral three-layer structure include saponite, hectorite, stevensite, and talc.

(4) Fluorescent agent: bis (triazonylamino) stilbene disulfonic acid derivative, bis (sulfostyryl) biphenyl salt [Tinopearl CBS] and the like. (5) Enzymes: lipase, protease, cellulase, amylase and the like. (6) bleach: percarbonate, perborate, etc. (7) Antistatic agents: cationic surfactants such as dialkyl-type quaternary ammonium salts. (8) Surface modifier: fine calcium carbonate, fine zeolite, polyethylene glycol and the like. (9) Anti-redeposition agent: cellulose derivatives such as carboxymethyl cellulose. (10) Extenders: sodium sulfate, potassium sulfate, sodium hydrochloride and the like. (11) Reducing agents: sodium sulfite, potassium sulfite, and the like. (12) Fragrances (13) Dyes (14) Softener

To produce the solid detergent composition of the present invention,
For example, in the case of powder, a surfactant that forms a hexagonal liquid crystal phase, another surfactant as needed, a component that suppresses the formation of a hexagonal liquid crystal phase of a surfactant, zeolite, sodium carbonate Spray drying method, dry neutralization method, stirring granulation method, kneading / crushing granulation method, paste granulation / drying method, wet granulation / drying method, flow It can be manufactured by a well-known powder detergent manufacturing method such as a layer granulation method, an extrusion granulation method, and a tumbling granulation method. However, before the surfactant that forms the hexagonal liquid crystal phase comes into contact with moisture or the moisture contained in other components, the surfactant and the component that suppresses the formation of the hexagonal liquid crystal phase must be mixed. Is preferred. Therefore, it is preferable to use a mixture of the two in advance when producing the solid detergent composition. In the case of manufacturing a molded product such as a tablet, a briquette, and a sheet, powdery, pellet, flake, and noodle-like solid detergent compositions are obtained, which are then subjected to, for example, a tableting method or a roll. What is necessary is just to shape | mold by well-known molding methods, such as a press method.

According to the present invention, even if a surfactant having a property of forming a hexagonal liquid crystal phase upon contact with water and having a property of decreasing the solubility is used as a surfactant constituting the solid detergent composition, Since a component that suppresses the formation of a hexagonal liquid crystal phase is added, the use of the detergent composition suppresses the formation of a hexagonal liquid crystal phase and provides good solubility. The solid detergent composition of the present invention can be used in a centrifugal washing machine in which the flow pattern of the contents in the washing machine is mild, and the detergent remains less dissolved even when washed with low-temperature water, and the detergent coagulates. Is also suppressed. Further, in a detergent containing a nonionic surfactant as a main component, improvement of solubility and cohesiveness was a problem, but according to the present invention, a nonionic surfactant was used as a main component, and the advantages of a nonionic surfactant were given. It is possible to obtain a solid detergent composition which has characteristics such as excellent hard water resistance, exhibits relatively high surface activity at a low concentration, has good solubility, and suppresses aggregation of the detergent.

The embodiments of the present invention are summarized as follows. (1) The surfactant contained in the solid detergent composition of the present invention, which forms a hexagonal liquid crystal phase when mixed with water, has a single-chain hydrophobic group, has a molecular volume of V, and a hydrophobic group. Where L is the length and S is the molecular occupation area of the hydrophilic group,
It satisfies the following equation (I). V / (S × L) = 1/3 to 1/2 (I) (2) The surfactant contained in the solid detergent composition of the present invention, which forms a hexagonal liquid crystal phase when mixed with water, is as described above ( 1-a) a polyoxyethylene alkyl (or alkenyl) ether type nonionic surfactant, a fatty acid alkyl ester ethoxylate type nonionic surfactant represented by the chemical formula (i) described in (1-b),
The polyoxyethylene alkyl (or alkenyl) ether sulfate type anionic surfactant described in the above (1-c), the alkyl (or alkenyl) benzenesulfonic acid type anionic surfactant described in the above (1-d),
The alkyl (or alkenyl) described in the above (1-e)
Sulfate-type anionic surfactant, α-olefinsulfonic acid-type anionic surfactant described in the above (1-f), α-sulfofatty acid lower alkyl ester-type anionic surfactant described in the above (1-g), and The above (1
One or more kinds selected from the group consisting of the alkylcarboxylic acid type anionic surfactants described in -h). (3) The surfactant contained in the solid detergent composition of the present invention, which forms a hexagonal liquid crystal phase when mixed with water, is particularly the nonionic surfactant described in the above (1-a) and the above-mentioned (1-a). It is preferable to use one or more selected from the group consisting of the nonionic surfactants described in b). (4) The component contained in the solid detergent composition of the present invention that suppresses the formation of a hexagonal liquid crystal phase is polyoxyethylene alkyl (or alkenyl) described in (2-a) above.
Ether, polyoxyethylene polyoxypropylene alkyl (or alkenyl) ether described in (2-b), polyoxyethylene polyoxypropylene glycol described in (2-c), and (2-b)
One or more selected from the group consisting of the fatty alcohols described in d). (5) The component contained in the solid detergent composition of the present invention, which suppresses the formation of a hexagonal liquid crystal phase, is particularly the component (2-a) described above.
Or the substance described in (2-b), wherein when the average number of moles of ethylene oxide or prolene oxide is n, the number of moles of ethylene oxide or prolene oxide is n is 10% by mass or more. The number of moles is n ±
One having an addition molar distribution of 9% by mass or more, one having an addition mole number of n ± 2 of 8% by mass or more, and one having an addition number of n ± 5 of 3% by mass or less is preferable.

[0019]

EXAMPLES (Examples and Comparative Examples) As Examples and Comparative Examples of the present invention, powdered solid detergent compositions were prepared according to the formulations shown in Table 1 below. A surfactant that forms a hexagonal liquid crystal phase (referred to as an H1 type surfactant in the table) and a component that suppresses the formation of a hexagonal liquid crystal phase (referred to as an H1 formation inhibitor in the table) are mixed in advance to obtain a surfactant. Leave as a solution.
This surfactant solution was subjected to a test for suppressing the formation of a hexagonal liquid crystal phase using an X-ray diffraction method and a simple method as described later. In order to form a solid detergent composition, first, powder raw materials other than the surfactant solution, that is, zeolite (at the time of roll granulation) and Ash are placed on a horizontal cylindrical drum (length L = 0.48).
m, diameter D = 0.60 m) so as to have a volume filling rate of 33%, and mixed at a rotation speed equivalent to a Froude number of 0.4 for 1 minute. Next, a previously prepared surfactant solution was supplied to the powder raw material at a spray density of 0.30 g / cm ² · min using a two-fluid nozzle to perform tumbling granulation. After completion of the supply, the mixture was aged for 3 minutes, and finally, the surface was coated with zeolite (at the time of coating) to obtain a granular detergent composition. The bulk density and average particle size of the obtained powdery and granular detergent composition were measured. Table 1 shows the measurement results.

(Test Examples) (1) Test for suppressing formation of hexagonal liquid crystal phase (X-ray diffraction method) A surfactant that forms a hexagonal liquid crystal phase and a component that suppresses the formation of a hexagonal liquid crystal phase at each mixing ratio shown in Table 1. And 100 g of the surfactant solution obtained by mixing
g was added, and this was subjected to X-ray diffraction analysis to determine the ratio of the obtained long plane spacing. Further, the operation of adding 5 g of water and performing X-ray diffraction analysis was repeated until the total amount of added water reached 1000 g (200 times in total). The following standard evaluated the ratio of the long surface interval obtained by 200 measurements. The higher the ratio of the long-plane spacing that does not take the ratio of 1: 1/3: 1/4: 1/7 indicates that the formation of the hexagonal liquid crystal phase is more effectively suppressed. Table 1 shows the evaluation results. ：: Probability of not taking a ratio of 1: 1/3: 1/4: 1/7 in the long surface interval of 90% or more ：: A ratio of 1: 1/3: 1/4: 1/7 in the long surface interval Probability of not taking 70% or more and less than 90% △: Probability of not taking a ratio of 1/3: 1/4: 1/7 in long plane spacing 50% or more and less than 70% ×: Long plane spacing of 1/1 / Probability of not taking the ratio of 3: 1/4: 1/7 is less than 50%

(2) Test for inhibiting formation of hexagonal liquid crystal phase (simple method) Obtained by mixing a surfactant for forming a hexagonal liquid crystal phase and a component for suppressing the formation of a hexagonal liquid crystal phase at each mixing ratio shown in Table 1. 5 g of water to 100 g of the obtained surfactant solution
The viscosity at 25 ° C. was measured using a Brookfield viscometer. Further, the operation of adding 5 g of water and measuring the viscosity is repeated until the total amount of added water reaches 1000 g (200 times in total). The measurement result of the obtained viscosity is
X axis is water content (%) of surfactant solution, Y axis is viscosity (P)
And a peak at which the viscosity sharply increased was observed. Separately, when preparing the surfactant solution, a surfactant alone solution was prepared without adding a component for suppressing the formation of a hexagonal liquid crystal phase. Using 100 g of the single solution, the measurement of the viscosity was repeated 200 times in the same manner as described above, and the measurement results were graphed, and a peak at which the viscosity sharply increased was observed. When the height of the peak in the surfactant solution was H and the height of the peak in the single solution was H ′, a value represented by (H′−H) / H ′ × 100 was calculated. This value represents the amount of reduction of the peak. The closer this value is to 100, the more effectively the formation of the hexagonal liquid crystal phase is suppressed, and the closer this value is to 0, the lower the effect of suppressing the formation of the hexagonal liquid crystal phase. . Table 1 shows the calculation results.

(3) Solubility test of the product The powdery and granular detergent compositions obtained in Examples and Comparative Examples were washed, and their solubility was examined. That is, 5 centrifugal washing machines (NA-F700P, manufactured by Matsushita Electric Industrial Co., Ltd.)
60 liters of water, and then black nylon slip, acrylic jersey and polyester jersey for a total of 2
After putting in kg, 80 g of the granular detergent composition was added and washed in a soft mode for 10 minutes. Subsequently, after dehydration for 4 minutes, the clothes were dried in the sun and the dried clothes were observed. No rinsing is performed in the sense of a severe test. The solubility was evaluated according to the following criteria. Table 1 shows the results. ◎: No white spots are observed at all. ○: Very few white spots are observed. X: White spots are observed at a considerable number.

(4) Product Cohesion Test The powdery detergent compositions obtained in Examples and Comparative Examples were tested for cohesion. First, 10 g of the granular detergent composition was wrapped in gauze, and the mouth was tied up so as not to leak. This is 5
The mixture was put into a beaker containing 1 liter of water at a temperature of 5 ° C., and stirred for 5 minutes with two paddle-shaped blades having a flow pattern of only circumferential flow (assuming a centrifugal washing machine). Next, the gauze was opened, and the contents were opened through a sieve having a mesh size of 500 μm, and the aggregate on the sieve was collected and dried at 105 ° C. for 2 hours. Finally, the mass of the dried product was measured, and the granular detergent composition 1 used for the test was used.
The mass percentage (%) of the dried aggregates with respect to 0 g was determined.
The closer this value is to 0, the more effectively the aggregation of the detergent composition is suppressed. Table 1 shows the results.

[0024]

[Table 1]

The raw materials used in Table 1 are as follows. H1 type surfactant A: C ₁₂ H ₂₅ O (EO) ₆ H (manufactured by Lion Chemical Co., Ltd., NALF) H1 type surfactant B: α-sulfo fatty acid methyl ester sodium (manufactured by Lion Corporation, fatty acid residue) Group: C ₁₄ / C
₁₆ = 2/8) H1 formation inhibitor A: C ₁₃ H ₂₇ O (EO) ₇ (PO) ₃ H
(Prepared by the method described in JP-B-6-15038) H1 formation inhibitor B: C ₁₂ H ₂₅ O (EO) ₄ H H1 formation inhibitor C: C ₁₃ H ₂₇ OH (Mitsubishi Chemical Corporation) Made,
Diadol 13) H1 formation inhibitor D: Condensate of 13 mol of (EO) and 24 mol of (PO) Zeolite: P-type zeolite (manufactured by Crossfield Co., Ltd.
Doucil A24) Ash: Heavy sodium carbonate (Asahi Glass Co., Ltd., grain ash)

[0026]

As described above, according to the present invention, even when the surfactant constituting the solid detergent composition is a surfactant which forms a hexagonal liquid crystal phase when mixed with water, the surfactant can be used. By adding a component that suppresses the formation of a hexagonal liquid crystal phase of the agent, the solubility of the solid detergent composition in water can be improved and aggregation can be suppressed. Therefore, even when washing is performed with a washing machine having a relatively small stirring power, aggregation of the detergent is suppressed, and generation of spot-like detergent insolubles is suppressed.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) C11D 1/74 C11D 1/74 F term (Reference) 4H003 AB03 AB15 AB19 AB21 AB27 AB31 AC08 AC12 AC23 BA01 BA23 DA01 EA16 EA28 EB04 EB34 FA32

Claims (1)

[Claims] 1. A solid detergent composition comprising: a surfactant which forms a hexagonal liquid crystal phase when mixed with water; and a component which suppresses the formation of a hexagonal liquid crystal phase of the surfactant.