JP2000192082A - Deodorizing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for eliminating an odor of the hard surface of a chopping board, tableware, or the like. SOLUTION: This method uses a liquid composition which has a pH of 5.5-8.5 and contains a surfactant having an 8-20C alkyl or alkenyl group. The composition has such characteristics that when the composition is diluted with ion- exchanged water to a concentration of 10 wt.% and then is mixed with an aqueous 1 wt.% ammonia solution in a wt. ratio of 50:1, a mixture having a pH of 7.0-9.2 at 25 deg.C is obtained and that when the aqueous 10 wt.% solution of the composition is mixed with an aqueous 5 wt.% acetic acid solution in a wt. ratio of 50:1, a mixture having a pH of 4.8-7.0 at 25 deg.C is obtained. The composition is attached to an object to be deodorized and the object is rubbed with a solid or the composition is attached to a solid and the object is rubbed with the solid.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method for deodorizing hard surfaces.

[0002]

2. Description of the Related Art Odors such as raw fish tend to remain on hard surfaces such as tableware and cutting boards, and it is difficult to completely remove them by washing. Unpleasant odors derived from foods such as raw fish are caused by amine compounds represented by ammonia, lower fatty acid compounds such as acetic acid and butyric acid, and sulfur compounds represented by mercaptan. In particular, amine compounds are washed once. This is one of the unpleasant odors that cannot be easily removed. It is considered that the reason is that the odorous substance is attached to the hard surface in a state of being taken in the oily substance such as oil or wax.

[0003] Detergents having a deodorizing performance include those in which a vegetable deodorant component is blended in JP-A-9-137194, and specific surfactants and chelating agents described in JP-A-8-302393. Although the blended one is disclosed,
These cleaning agents could not sufficiently remove odors derived from food.

An object of the present invention is to provide a method for deodorizing odors attached to hard surfaces such as cutting boards and tableware.

[0005]

The present invention contains a surfactant having an alkyl or alkenyl group having 8 to 20 carbon atoms in the molecule, and has a pH of 5.5 to 8.5 at 25 ° C.
A liquid solution obtained by diluting the liquid composition to 10% by weight with ion-exchanged water and a 50: 1 (weight ratio) mixed solution of a 1% by weight aqueous ammonia solution at 25 ° C.
H is 7.0 to 9.2 and 10% by weight of the liquid composition
A liquid composition having a pH of 4.8 to 7.0 at 25 ° C. of a 50: 1 (weight ratio) mixed solution of an aqueous solution and a 5% by weight acetic acid aqueous solution is adhered to an object to be deodorized and then rubbed with a solid substance. Alternatively, there is provided a deodorizing method in which the liquid composition is previously adhered to a solid material and then the object to be deodorized is rubbed.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The surfactant used in the present invention includes an anionic surfactant, a nonionic surfactant and an amphoteric surfactant having an alkyl or alkenyl group having 8 to 20 carbon atoms in the molecule. Any of the agents can be blended.

[0007] The surfactant is present in the liquid composition in an amount of 0.1 to 90%.
% By weight, preferably 5 to 80% by weight, and preferably 20 to 80% by weight when used as a deodorant cleaner for kitchen use.

[0008] The liquid composition of the present invention has a property (hereinafter referred to as pH) that the pH when adjusted under specific conditions falls within a predetermined range.
Buffer capacity). That is, the pH at 25 ° C. of a 50: 1 (weight ratio) mixed solution of a 10% by weight aqueous solution of a liquid composition and a 1% by weight aqueous ammonia solution is 7.0 to 9.2,
Preferably from 7.0 to 8.5, and 1 of the liquid composition
PH at 25 ° C. of a 50: 1 (weight ratio) mixed solution of 0% by weight aqueous solution and 5% by weight acetic acid aqueous solution is 4.8 to 7.0;
It is preferably 5.5 to 7.0, and such pH buffering capacity is achieved by a single component or a combination incorporated into the liquid composition.

In the present invention, a preferable embodiment for satisfying the pH buffering ability is a combination of (i) a polyoxyethylene alkyl ether sulfate ester salt and an amine oxide as a surfactant or (ii) a surfactant. This is an embodiment in which a polycarboxylic acid type surfactant is blended, and these can be used alone, in combination with each other, or in combination with other components that suppress a change in pH, so that the deodorant detergent exhibits pH buffering ability and has excellent deodorant performance. Can be obtained.

The polyoxyethylene alkyl ether sulfate of (i) is an alkyl group having 8 to 18 carbon atoms,
Preferably, a polyoxyethylene alkyl ether sulfate having a C14 to C14 alkyl group is blended. The polyoxyethylene chain of the polyoxyethylene alkyl ether sulfate has an average number of moles of addition (POE) of 1 to 10, preferably 1 to 6. Counter ions are alkali metals, alkaline earth metals,
One or more selected from ammonium and alkanolamine, preferably one or more selected from sodium, potassium, magnesium and ammonium.

Amine oxide has 8 to 18 carbon atoms.
Amine oxides having an alkyl group of are preferred. Examples of the amine oxide include those represented by the following formulas (1) to (3), and among them, those represented by the formula (1) are preferable.

[0012]

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[Wherein, R ¹ represents an alkyl group or alkenyl group having 8 to 20 carbon atoms, and R ² represents an alkylene group having 1 to 5 carbon atoms. ] The amount of the polyoxyethylene alkyl ether sulfate ester salt and the amine oxide in the liquid composition is determined by the balance with other components that suppress the change in pH,
In consideration of the detergency, the total content is preferably 10 to 60% by weight, and more preferably 15 to 40% by weight. Furthermore, the weight ratio of polyoxyethylene alkyl ether sulfate / amine oxide is:
It is preferably 50/50 to 80/20.

The polycarboxylic acid type surfactant (ii) is as follows:
A molecule having at least two, preferably two or three carboxyl groups and an alkyl or alkenyl group having 8 to 20 carbon atoms, and a Davis method (surfactant properties / application / chemical ecology, Fumio Kitahara HLB determined by the method described in Kodansha Scientific, 7th printing, P24-27), 4-15 in the state of carboxylic acid.
Preferably, it shows a property of 4 to 10. Such a carboxylic acid type surfactant is particularly preferably a compound represented by the general formula (I).

[0015]

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Wherein R ³ is an alkyl or alkenyl group having 10 to 18 carbon atoms which may be interrupted by an amide group, and R ⁴ , R ⁵ and R ⁶ are each independently hydrogen, methyl or Represents an ethyl group; R ⁷ is hydrogen, C ₂ H ₄ OH or CO
OM (where M represents hydrogen, an alkali metal or an alkaline earth metal); X represents a methylene group, an amino group or an ether group; l, m and n each independently represent 0 or 1
And p, q, and r are 0, 1 or 2, and p + q + r = 3
(However, when X is a methylene group or an ether group, p and q represent 1 or 2); R ³ ,
R ⁴ , R ⁵ , R ⁶ , R ⁷ , X, l, m, n, p, q, and r are selected so that the HLB determined by the above Davis method is 4 to 16. However, it is assumed that HLB determines M as hydrogen.]

In particular, this polycarboxylic acid type surfactant has an acid value per weight of 300 to 6 as an acid state.
00 mg KOH / g is preferable, and especially 300 to 5
00 mg KOH / g is preferred. The acid value was determined by measuring 0.5 g of the acid in toluene / ethanol (volume ratio 50 /
50, phenolphthalein 0.5% by weight added) Solvent 5
0 mg, and titrated with 0.1N KOH. The time when phenolphthalein was colored was determined as the end point.
It is a numerical value expressing the amount of 1N KOH in mg.

Preferred specific examples of the polycarboxylic acid type surfactant include salts of compounds represented by the following formulas (4) to (9), and among them, those of the following formulas (7) to (9) are particularly preferable. It is preferable in terms of deodorizing performance. Note that the polycarboxylic acid type surfactant is partially or entirely in the form of a salt with an alkali metal, an alkaline earth metal, or an alkanolamine, and is present in a partially acidic state in a liquid composition depending on pH conditions. May be.

[0019]

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[Wherein, R ⁸ is an alkyl or alkenyl group having ⁸ to 20 carbon atoms and is selected so as to satisfy the above HLB and acid value. ] The amount of the polycarboxylic acid type surfactant in the liquid composition is p with respect to the addition of another acid or alkali.
Although it is determined by the balance with the component that suppresses the H change, it is preferably contained in the liquid composition in an amount of 0.1 to 15% by weight, and 0.2 to 10% by weight is contained in the liquid composition for cleaning and erasing. More preferable in terms of improving odor performance.

When the liquid composition of the present invention is used as a deodorant detergent for dishes, the components shown in (i) and (ii) are used in an amount of 60% by weight to 100% by weight in the surfactant. It is preferable to mix them in a proportion group that occupies the above (i) and (i)
Most preferably, the surfactant (i) is used in combination.

In the liquid detergent of the present invention, a compound having at least one carboxylic acid group and having 3 to 7 carbon atoms (hereinafter referred to as a lower carboxylic acid compound) is preferably used in combination as an agent for suppressing a change in pH. Specifically, lactic acid, gluconic acid, succinic acid, glutaric acid, adipic acid, malic acid, tartaric acid, maleic acid, fumaric acid, itaconic acid, citric acid, benzoic acid, salicylic acid, various amino acids and salts thereof may be mentioned. it can. Among them, lactic acid, succinic acid, malic acid, tartaric acid, citric acid, benzoic acid, various amino acids and salts thereof are preferable. The lower carboxylic acid compound is preferably contained in the liquid composition in an amount of 0.1 to 20% by weight,
More preferably, the content is 0.2 to 10% by weight.

Some of these lower carboxylic acid compounds have been conventionally known as compounds having an action of inhibiting a change in pH. However, in the liquid composition of the present invention, a compound having a pH buffering ability is not used. Further, it is preferable to add these lower carboxylic acid compounds as auxiliary components. Preferably, it is used in combination with a polycarboxylic surfactant.

Other agents that contribute to the pH buffering capacity of the liquid composition include amine salts and phosphates, and polymers having an acid or basic group. As the polymer, a polymer having a carboxylic acid group is preferable, and a polymer using at least one monomer selected from acrylic acid, methacrylic acid, maleic acid and itaconic acid can be used, and polyaspartic acid can also be used. can do.

The liquid composition of the present invention contains solubilizing agents such as ethanol, glycerin, propylene glycol, polyethylene glycol, polypropylene glycol, lower alkyl benzene sulfonate, gum arabic, dextran, pullulan, etc. as long as the effects are not impaired. Thickeners such as arabinogalactan, carboxymethylcellulose, xanthan gum, sodium polyacrylate, sodium alginate, sodium caseinate, etc., fragrances for imparting a masking action, pigments, preservatives, fungicides and the like can be added.

The liquid composition of the present invention is preferably in the form of a liquid in which the balance is water, but may be in the form of an emulsion, a liquid crystal droplet or a solid dispersed therein in addition to a uniform solution. Even if it is used, any fluid having no inconvenience in use may be used. The viscosity is appropriately adjusted according to the application.

The pH of the liquid composition of the present invention is determined by adjusting the pH of the stock solution at 25 ° C. in order to obtain an effective deodorizing performance against food odor.
H is preferably 5.5 to 8.5, more preferably 6.0.
~ 8.0. In adjusting the pH, it is preferable to use one or more selected from an acid type of a polycarboxylic acid type surfactant, an organic polycarboxylic acid, sulfuric acid, hydrochloric acid and a polymer having a carboxylic acid group as an acid agent, and an alkali agent. It is preferable to use at least one selected from alkali metal hydroxides and alkanolamines.

In the present invention, the liquid composition is brought into contact with the object to be deodorized to deodorize. As a method of contacting, the liquid composition was brought into direct contact with the object to be deodorized, and then rubbed with a solid such as a flexible material, or the liquid composition was adhered to a solid such as a flexible material. Thereafter, a method of rubbing the object to be deodorized is necessary to obtain a satisfactory deodorizing effect. At this time, the liquid composition is used in the form of an undiluted solution or diluted. When diluted, the liquid composition is used up to 200 times, preferably up to 100 times. When diluting the liquid composition in advance,
The diluent is contained in a solid material such as a flexible material, and the object to be deodorized is rubbed, or placed in a commonly used manual spray container and sprayed on the object to be deodorized. The method of rubbing with a solid material can be applied.

When the flexible material to be rubbed is a sponge-like water-absorbing substance, moisture may be present in the flexible material. After rubbing, it is preferable that the surface of the object to be deodorized is flushed with water. The flexible material used in the present invention is preferably nylon, polypropylene, polyester, cellulose, polyacrylamide, polyurethane, polyvinyl chloride, a sponge, scourer, or brush made from plant fibers, especially when the hard surface is ceramic. In the case of plastics such as polyethylene and the like, the flexible material is preferably made of polyurethane or cellulose as a raw material.

The deodorizing method of the present invention is preferably used for deodorizing hard surfaces, and is particularly effective for amine-based odors such as fish, and is used for deodorizing tableware and cooking utensils. It is most preferred to use. In addition, the present invention can directly process even in the state where dirt remains,
A deodorizing method that also serves as washing may be used.

[0031]

The details of each component used in the following examples and comparative examples are as follows.

Synthesis Example 1 Synthesis of Compound (a-1)

[0033]

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(HLB = 5.9, acid value = 371) Lauryl alcohol 372.6 g (MW 186.3), NaOH 2
g was placed in a four-necked flask and heated to 120 ° C. Thereafter, the reaction was performed for 3 hours under reduced pressure of 26.7 kPa while removing generated water. After returning to normal pressure by inflow of nitrogen gas, 79.1 g of dimethyl itaconate (MW 158.
15) was added dropwise over 1 hour. After 3 hours, the mixture was cooled to room temperature, and 300 g of ethanol and 2 parts of ion-exchanged water were added to the reaction mixture.
00 g and 90 g of NaOH were added and reacted at 90 ° C. for 2 hours. After cooling to 20 ° C, ion-exchanged water 2000m
l, hexane 1500 ml, 20% sulfuric acid aqueous solution 563.
5 g was added and neutralized by stirring. After washing the hexane layer with ion-exchanged water, distillation was performed to obtain a compound (a-1).

Synthesis Example 2 Synthesis of compound (a-2)

[0036]

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(HLB = 6.2, acid value = 360) 96.1 g of citric acid (MW 192.13, 105 ° C./26.7)
kPa / 5 hours dried), acetonitrile 20
0 g was placed in a four-necked flask and heated to 80 ° C. 120.3 g of lauric chloride was added dropwise over 3 hours. HCl generated at this time was distilled off while flowing nitrogen gas, and then nitrogen gas was further flowed for 3 hours. Thereafter, acetonitrile was distilled off under reduced pressure, and the obtained solid content was produced by recrystallization with ethanol.

<Other Components> a-3: Alkenyl succinic acid (alkenyl chain having 1 carbon atom)
Two things. HLB = 4.6, acid value = 395) b-1: Amphitol 20N (dodecyldimethylamine oxide, manufactured by Kao Corporation) c-1: Emal 70C (sodium polyoxyethylene dodecyl ether sulfate [average ethylene oxide addition] Mole number = 2], manufactured by Kao Corporation c-2: Emulgen (registered trademark) 108 (dodecyl alcohol with an average of 6 moles of ethylene oxide added thereto) d-1: citric acid e-1: p-toluene Sodium sulfonate e-2: sodium benzoate e-3: ethanol.

Examples 1-4, Comparative Examples 1-4 Liquid compositions were prepared using the components shown in Table 1. The numerical value of the composition is% by weight, and the balance is water. pH 0.1N
And hydrochloric acid and sodium hydroxide. Using the following deodorant object (deodorant performance evaluation tile), methods 1 to 6 were used.
The deodorizing performance after the treatment was examined. The evaluation method was determined by a six-step odor intensity display method based on a direct display table of the sensory test method. Table 1 shows the results.

<Preparation of Deodorant Target (Deodorant Performance Evaluation Tile)> Triolein (a first-class reagent manufactured by Wako Pure Chemical) was distilled and purified, and 100 g of a 25% aqueous ammonia solution (manufactured by Wako Pure Chemical) was added to 0.1 g. Then, 0.1 g of butyric acid (a first-class reagent manufactured by Wako Pure Chemical Industries, Ltd.) was added and stirred to obtain a solution. INAX Corporation tile (MD-100 / 745, material; pottery, 10 × 10c
1 g of the solution was spread on the surface of m ² ) and allowed to stand at 50 ° C. for 24 hours. This deodorizing performance evaluation tile was used in a deodorizing experiment.

<Deodorizing Method> Method 1: A commercially available sponge [0.5 g of liquid composition / sheet is adhered to the center of the tile for evaluating deodorizing performance, and 50 g of tap water is contained. (7.5 x 11.5 x 2.8 cm, of which the thickness of the nylon non-woven fabric is 0.5 cm) manufactured by Sumitomo 3M Limited. Using the polyurethane foam surface described below], the liquid composition was evenly rubbed for 15 seconds so as to spread the liquid composition over the entire surface of the tile. It was rubbed for about 1 minute, rinsed with tap water, and air-dried.

Method 2: A commercially available sponge was filled with 50 g of water, and 0.5 g of the liquid composition was applied to the center of the polyurethane foam surface of the sponge. Using a sponge to which the liquid composition was adhered, the five deodorizing performance evaluation tiles were evenly rubbed over a period of 15 seconds per one tile. After rinsing with tap water, it was air-dried.

Method 3: 500 ml of tap water (water temperature 21 ° C.)
The deodorizing performance evaluation tile was immersed in a solution prepared by dissolving 5 g of the liquid composition in Example 1 and was rubbed and washed 10 times with a polyurethane foam surface of a commercially available sponge. After that, rinse with tap water,
Air dried.

Method 4: 400 ml of a 2% by weight aqueous solution of the liquid composition was placed in a commercially available manual spray container. Then, it was sprayed three times on the deodorizing performance evaluation tile, rubbed ten times with a polyurethane foam surface of a commercially available sponge, rinsed with tap water, and air-dried.

Method 5: Liquid composition 5 in 500 ml of tap water
g was dissolved, and the deodorizing performance evaluation tile was immersed (21 ° C./1 hour). Thereafter, the tiles were rinsed with tap water and air-dried.

Method 6: A commercially available manual spray container was charged with 400 ml of a 2% by weight aqueous solution of the liquid composition. The deodorizing performance evaluation tile was sprayed three times, left for 30 minutes, rinsed with tap water, and air-dried.

<Evaluation of deodorant performance (1)> Female 1 in her 30s
The odors of the five tiles were evaluated by the panelists of 0 by the following six-step odor intensity display method, and the average score was obtained. Table 1 shows the results, where the average score is 0 or more and less than 1, ◎ represents 1 or more and less than 2, ○ represents 2 or more and less than 3, and Δ represents 3 or more and 5 or less. 0: Odorless 1: I don't know what odor, but the intensity of feeling something slightly (detection threshold level) 2: I understand what odor, easily felt weak odor (level of recognition threshold) 3: Clear Smell to feel 4: Strong smell 5: Unbearable strong smell

[0048]

[Table 1]

Examples 5 to 7 and Comparative Examples 5 to 6 Liquid compositions were prepared using the components shown in Table 2. In addition,
The pH was adjusted with 0.1N hydrochloric acid and sodium hydroxide.
The cutting board that has been subjected to the following processing is processed by methods 7 to 9,
The deodorizing performance was evaluated. Table 2 shows the results.

<Preparation of object to be deodorized (cutting board)> Raw sardines were reduced into three pieces, and the body was put into a mixer and crushed. 5 g of this surimi was rubbed with a spoon on a wooden cutting board having a length of 25 cm and a width of 40 cm, and left for 1 hour. Thereafter, the solid content was washed off with water.

<Deodorizing Method> Method 7: A predetermined amount of the liquid composition shown in Table 2 was adhered to the center of the above cutting board, and the liquid was evenly dispersed using a polyurethane foam surface of a commercially available sponge containing 50 g of tap water. The composition was rubbed for 3 minutes so that the composition spread over the entire cutting board. After that, it was rubbed for 1 minute, rinsed with tap water, and air-dried. Method 8: Apply 5% on the polyurethane foam surface of a commercially available sponge.
0 g of water was added, and a predetermined amount of the liquid composition shown in Table 2 was adhered to the sponge. Using the sponge, the cutting board was evenly scrubbed (about 1 minute). After rinsing with tap water, it was air-dried.

Method 9; width 50 cm, length 30 cm, depth 1
10 L of tap water and 10 g of the liquid composition shown in Table 2 were dissolved in a 0 cm plastic vat, and the cutting board was immersed (water temperature: 21 ° C./1 hour). Then, it was rinsed with tap water and dried naturally.

<Evaluation of Deodorizing Performance (2)> The smell of the cutting board treated by the above-mentioned method was evaluated by a trained 10-year-old woman
It was evaluated by human panelists. The evaluation criteria were the same as in the deodorant performance evaluation (1), and the average score was determined.

[0054]

[Table 2]

Examples 8 to 11 and Comparative Examples 7 to 8 Using the components shown in Table 3, liquid compositions were prepared. In addition,
The pH was adjusted with 0.1N hydrochloric acid and sodium hydroxide.
After being treated by the following methods 10 to 11, the deodorizing performance was examined by the following evaluation (3) of the deodorizing effect. Table 3 shows the results.

<Preparation of Object for Deodorization> A Western-style toilet made by INAX Co., Ltd. was used as a ceramic toilet when used by ten men in their thirties for two days.

<Deodorizing Method> Method 10: A manual spray was filled with 400 ml of the liquid composition and sprayed on the entire interior of the toilet (sprayed six times). 5
After standing for 1 minute, the whole was rubbed for 3 minutes with a toilet brush (a flat toilet brush manufactured by Ohe Co., Ltd., product number 8071, brush part material: vinyl chloride resin), and then water was poured once.

Method 11: In the same manner as in Method 10, the liquid composition was sprayed on the entire interior of the toilet, and then left for 30 minutes.
Water was flushed once.

<Deodorization Performance Evaluation (3)> The odor of the toilet treated by the above method was evaluated by a trained panel of 10 males in their 30s according to the following criteria. The evaluation criteria were the same as in the deodorant performance evaluation (1), and the average score was determined.

[0060]

[Table 3]

[0061]

According to the deodorizing method of the present invention, unpleasant odors of various origins can be removed or reduced.

[Procedure amendment]

[Submission date] January 18, 1999 (1999.1.1)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0005

[Correction method] Change

[Correction contents]

[0005]

The present invention contains a surfactant having an alkyl or alkenyl group having 8 to 20 carbon atoms in the molecule, and has a pH of 5.5 to 8.5 at 25 ° C.
A liquid solution obtained by diluting the liquid composition to 10% by weight with ion-exchanged water and a 50: 1 (weight ratio) mixed solution of a 1% by weight aqueous ammonia solution at 25 ° C.
H is 7.0 to 9.2 and 10% by weight of the liquid composition
Aqueous solution and 5 wt% acetic acid aqueous solution of 50: Rub 1 (weight ratio) Liquid composition has a pH of 4.8 to 7.0 at 25 ° C. of the mixed solution, in solids after depositing deodorizing object Alternatively, there is provided a deodorizing method in which the liquid composition is previously adhered to a solid substance and then the object to be deodorized is rubbed.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

Wherein R ³ is an alkyl or alkenyl group having 10 to 18 carbon atoms which may be interrupted by an amide group, and R ⁴ , R ⁵ and R ⁶ are each independently hydrogen, methyl or Represents an ethyl group; R ⁷ is hydrogen, C ₂ H ₄ OH or CO
OM (where M represents hydrogen, an alkali metal or an alkaline earth metal); X represents a methylene group, an amino group or an ether group; l, m and n each independently represent 0 or 1
And p, q, and r are 0, 1 or 2, and p + q + r = 3
(However, when X is a methylene group or an ether group, p and q represent 1 or 2); R ³ ,
R ⁴ , R ⁵ , R ⁶ , R ⁷ , X, l, m, n, p, q, and r are selected so that the HLB determined by the above Davis method is 4 to 15 . However, it is assumed that HLB determines M as hydrogen.]

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0021

[Correction method] Change

[Correction contents]

When the liquid composition of the present invention is used as a deodorant detergent for dishes, the components shown in (i) and (ii) are used in an amount of 60% by weight to 100% by weight in the surfactant. Occupy
It is preferable to mix them in proportions , and the above (i) and (ii)
It is most preferable to use a surfactant in combination.

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Shigeru Tamura 1334 Minato, Wakayama, Wakayama Pref. EB07 EB08 EB22 ED02 ED28 FA27

Claims (1)

[Claims] 1. A liquid composition containing a surfactant having an alkyl group or alkenyl group having 8 to 20 carbon atoms in a molecule, and having a pH at 25 ° C. of 5.5 to 8.5. 50: 1 (weight ratio) of an aqueous solution obtained by diluting the composition to 10% by weight with ion-exchanged water and a 1% by weight aqueous ammonia solution
PH of the mixed solution at 25 ° C is 7.0 to 9.2, and pH of a 50: 1 (weight ratio) mixed solution of a 10% by weight aqueous solution and a 5% by weight acetic acid aqueous solution of the liquid composition at 25 ° C.
4.8 to 7.0 is adhered to a deodorant object and then rubbed with a solid substance, or the liquid composition is previously adhered to a solid substance and then rubbed against the deodorant object. Method.