JP2020183497A - Alkaline detergent composition - Google Patents

Abstract

To provide an alkaline detergent composition having excellent adhesion to the surface to be cleaned and having high cleaning power.SOLUTION: An alkaline detergent composition characterized by containing 0.1-30% by mass of alkali metal hydroxide, 0.01-5% by mass of thickener, and 0.1-50% by mass of solvent having an SP value of 10.6 or higher.SELECTED DRAWING: None

Description

The present invention relates to an alkaline cleaning agent composition.

Cooking utensils such as pots and grills used at home, trivets, walls and floors in kitchens, especially ventilation fans and stoves, restaurants, kitchens such as hotels, supermarkets, walls and floors in food factories, food manufacturing / processing / cooking equipment, etc. A cleaning agent composition is used for cleaning. An alkaline cleaning agent composition is used as a cleaning agent composition suitable for cleaning oil stains.

When stains such as oil stains are firmly adhered to the surface to be cleaned, the stains can be easily peeled off from the surface to be cleaned by sufficiently contacting the cleaning agent composition with the stains for a long time.
Here, when the surface to be cleaned is a surface such as a vertical surface or an inclined surface on which the liquid easily flows down, even if the liquid cleaning agent composition is attached to the surface to be cleaned, it will flow down, so that the cleaning agent composition and the dirt Will not be in sufficient contact with.

As a conventional alkaline cleaning agent composition, for example, Patent Document 1 describes a liquid cleaning agent composition containing an alkaline component as an active ingredient and further containing an amine oxide and an alkyl polyglucoside.

Japanese Unexamined Patent Publication No. 2013-170192

In the alkaline cleaning agent composition, in order to further enhance the cleaning power against stains on the surface on which the liquid easily flows off, the cleaning agent composition is made to have a high viscosity to prevent the cleaning agent composition from flowing off from the surface, and cleaning is performed. We investigated the sufficient contact between the agent composition and dirt, and attempted to use a thickener to improve the viscosity of the cleaning agent composition.

The alkaline cleaning agent composition often contains a hydrophobic solvent in order to improve the cleaning power. However, the present inventor has found that it is difficult to uniformly dissolve the thickener in the hydrophobic solvent, and there is room for ingenuity to sufficiently increase the viscosity of the alkaline cleaning agent composition.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an alkaline cleaning agent composition having excellent adhesion to a surface to be cleaned and having high cleaning power.

The present inventor combines a specific solvent, a thickener, and a specific alkaline agent in a predetermined mass ratio in the alkaline cleaning agent composition, whereby the thickener and the alkaline agent are suitably dissolved in the solvent and increased. It has been found that the thickener exhibits a suitable thickening effect in the alkaline cleaning agent composition. And, such an alkaline cleaning agent composition is excellent in adhesion to a surface to be cleaned where a liquid such as a vertical surface or an inclined surface easily flows off, and also has a sufficient action of removing dirt, and as a result, The present invention has been completed by finding that the detergency is very excellent.

That is, the alkaline cleaning agent composition of the present invention contains 0.1 to 30% by mass of an alkali metal hydroxide, 0.01 to 5% by mass of a thickener, and 0.1 of a solvent having an SP value of 10.6 or more. It contains ~ 50% by mass. When two or more kinds of alkali metal hydroxides are contained, the content ratio of the alkali metal hydroxide is the total content ratio of these. The same applies to the content ratio of the thickener and the content ratio of the solvent having an SP value of 10.6 or more.
In the alkaline cleaning agent composition of the present invention, the thickener and the alkali metal hydroxide are preferably dissolved in a solvent having an SP value of 10.6 or more, and the thickener is suitable in the alkaline cleaning agent composition. Shows thickening effect. As a result, the alkaline cleaning agent composition of the present invention has excellent adhesion to the surface to be cleaned, such as a vertical surface or an inclined surface, on which a liquid easily flows off, and also has a sufficient action of removing dirt. There is, and the detergency is remarkably excellent on any surface to be cleaned.

The cleaning agent composition described in Patent Document 1 described above contains an alkyl polyglycoside, but the alkyl polyglycoside specifically disclosed in the examples has a short chain length and therefore has a thickening effect. It does not indicate that it acts as a surfactant. Therefore, it is considered that the cleaning agent composition specifically disclosed in Patent Document 1 does not have sufficient adhesiveness to the surface to be cleaned, such as a vertical surface or an inclined surface, where the liquid easily flows down.

The SP value (solubility parameter) is an index of the hydrophilicity of the solvent and is a value represented by the square root of the molecular aggregation energy. The unit is (cal / cm) ^1/2 , which refers to the value at 25 ° C. The SP value is R. F. Calculated according to the method described in Fedors, Polymer Engineering Science, 14, p147 (1967).
The SP value of water is 23.4. The closer the SP value is to 23.4, the more hydrophilic the solvent is, and the lower the SP value is, the more hydrophobic the solvent is.

The alkaline cleaning agent composition of the present invention preferably has a viscosity at 20 ° C. of 100 mPa · s or more.
When the viscosity of the alkaline cleaning agent composition of the present invention is as high as this, it is difficult to run off when it adheres to the surface to be cleaned, and the contact time with dirt can be lengthened. The detergency can be further enhanced.
The viscosity of the alkaline cleaning agent composition can be measured using an E-type viscometer in accordance with JIS Z 8803.
The liquid temperature at the time of measurement is 20 ° C., and the rotation speed of the viscometer is 1 rpm.

The alkaline cleaning agent composition of the present invention preferably has a pH of 12 or more.
When the pH of the alkaline cleaning agent composition of the present invention is as high as this, the detergency against stains such as oil stains can be further enhanced.

In the alkaline cleaning agent composition of the present invention, the solvent is preferably a glycol solvent and / or an alcohol solvent.
Thereby, the thickener and the alkali metal hydroxide can be more preferably dissolved in the solvent.

In the alkaline cleaning agent composition of the present invention, the thickener is preferably a polysaccharide thickener.
As a result, the polysaccharide thickener can be suitably dissolved in the solvent, and the thickening action in the alkaline cleaning agent composition of the present invention becomes more excellent.

In the alkaline cleaning agent composition of the present invention, the polysaccharide thickener is preferably at least one selected from the group consisting of xanthan gum, carrageenan, guar gum, pectin and glucomannan.
As a result, the thickening action of the polysaccharide thickener in the alkaline cleaning agent composition of the present invention becomes further excellent.

The alkaline cleaning agent composition of the present invention has excellent adhesion to the surface to be cleaned and has high cleaning power.

The alkaline cleaning agent composition of the present invention contains 0.1 to 30% by mass of an alkali metal hydroxide, 0.01 to 5% by mass of a thickener, and 0.1 to 50% of a solvent having an SP value of 10.6 or more. It is characterized by containing% by mass.

The alkali metal hydroxide, the thickener, and the solvent having an SP value of 10.6 or more, which constitute the alkaline cleaning agent composition of the present invention, will be described.

The alkali metal hydroxide is not particularly limited, but sodium hydroxide and potassium hydroxide are preferable.
By using the alkali metal hydroxide, it becomes easy to obtain a strongly alkaline cleaning agent composition, and the cleaning power against stains such as oil stains becomes higher.
Two or more kinds of these alkali metal hydroxides may be used in combination.

The content of the alkali metal hydroxide is 0.1 to 30% by mass, preferably 0.3 to 17% by mass, and more preferably 0.5 to 10% by mass.
If the content of the alkali metal hydroxide exceeds 30% by mass, it becomes difficult to maintain uniform transparency in appearance. If it is less than 0.1% by mass, it is difficult to sufficiently remove dirt.
As described above, the content of the alkali metal hydroxide when a plurality of types of alkali metal hydroxides are contained is determined as the total amount thereof.

The thickener is not particularly limited as long as it has a thickening effect, but a polysaccharide thickener is preferable.
As the polysaccharide thickener, a food additive is preferable, and for example, at least one selected from the group consisting of xanthan gum, carrageenan, guar gum, pectin, daiyutan gum, welan gum, and glucomannan is preferable.
Of these, it is more preferable to use xanthan gum.

The content of the thickener is 0.01 to 5% by mass, preferably 0.05 to 3% by mass, and more preferably 0.25 to 2% by mass.
When the content of the thickener is within the above range, the viscosity of the cleaning agent composition is adjusted to an appropriate range.
As described above, the content of the thickener when a plurality of types of thickeners are contained is determined as the total amount thereof.

The solvent having an SP value of 10.6 or more is not particularly limited as long as it is an organic solvent having an SP value of 10.6 or more, but the SP value is preferably 11.0 or more. Further, the SP value of the solvent is preferably 23.0 or less, and more preferably 21.0 or less.
Examples of the solvent having an SP value of 10.6 or more include a glycol ether solvent, a glycol solvent, and an alcohol solvent, and among them, a glycol solvent and / or an alcohol solvent is preferable.
As the glycol-based solvent, ethylene glycol, polyethylene glycol, propylene glycol, dipropylene glycol, glycerin, butanediol, and hexanediol are preferable.
As the alcohol solvent, methanol, ethanol, 1-propanol, isopropanol, butanol, methoxyethanol and ethoxyethanol are preferable.
These solvents may be used in combination.

The content of the solvent having an SP value of 10.6 or more is 0.1 to 50% by mass, preferably 0.5 to 20% by mass, and more preferably 1 to 10% by mass. It is more preferably 3% by mass or more.
When the content of the solvent having an SP value of 10.6 or more is within the above range, each component of the cleaning agent composition can be sufficiently dissolved, and the effect of the present invention can be sufficiently exhibited.
As described above, when a plurality of types of solvents having an SP value of 10.6 or more are contained, the content of the solvent is defined as the total amount thereof.

The alkaline cleaning agent composition of the present invention has an SP value of dipropylene glycol monopropyl ether, 3-methoxy-3-methylbutanol, diethylene glycol monobutyl ether and the like as long as it contains a predetermined amount of a solvent having an SP value of 10.6 or more. It may further contain less than 10.6 solvents.
Solvents with an SP value of less than 10.6 may be used in combination.

When the alkaline cleaning agent composition of the present invention further contains a solvent having an SP value of less than 10.6, the content of the solvent having an SP value of less than 10.6 may be 0.1 to 20% by mass. It is preferably 0.5 to 10% by mass, more preferably 0.5 to 10% by mass.
When the content of the solvent having an SP value of less than 10.6 is within the above range, the detergency of the cleaning agent composition becomes more excellent.
When a plurality of types of solvents having an SP value of less than 10.6 are contained, the content of the solvent is defined as the total amount thereof.
When the alkaline cleaning agent composition of the present invention further contains a solvent having an SP value of less than 10.6, the mass ratio of the solvent having an SP value of 10.6 or more to the solvent having an SP value of less than 10.6 is From the viewpoint of making the detergency on a vertical surface or an inclined surface more excellent, it is preferably 40 to 99/1 to 60, more preferably 50 to 95/5 to 50, and 55 to 90. It is more preferably / 10 to 45, and particularly preferably 60 to 80/20 to 40.
When the content of the solvent having an SP value of 10.6 or more is within the above mass ratio range, the thickener and the alkaline agent are preferably dissolved in the solvent. On the other hand, if the content of the solvent having an SP value of less than 10.6 is larger than that in the range of the above mass ratio, the compounding stability of the cleaning agent composition may deteriorate.

The alkaline cleaning agent composition of the present invention may further contain a surfactant.
The type of the surfactant is not particularly limited, and examples thereof include an anionic surfactant, an amphoteric surfactant, and a nonionic surfactant.
Anionic surfactants include fatty acid salts, alkyl ether sulfonates (AES), alkane sulfonates, α-olefin sulfonates, α-sulfomethyl ester salts, alkylbenzene sulfonates (LAS), alkyl succinic acids. Examples thereof include salts, alkyl sulfate ester salts, and alkyl ether sulfate ester salts.
Examples of the amphoteric surfactant include alkylaminobetaine, alkylamide betaine, and alkylaminosulfobetaine.
Nonionic surfactants include polyoxyalkylene alkyl ether, polyoxyalkylene alkyl phenyl ether, polyoxyalkylene fatty acid ester, polyoxyalkylene sorbitan fatty acid ester, polyglycerin fatty acid ester, sorbitan fatty acid ester, sucrose fatty acid ester, and alkyl poly. Examples thereof include glucoside, polyoxyethylene methyl ether fatty acid ester, fatty acid alkanolamide, polyoxyalkylene alkylamine, and alkylamine oxide.
When the surfactant is a salt, the salt is not particularly limited, but sodium salt, potassium salt, magnesium salt and the like are preferable.
Two or more of these various surfactants may be used in combination.

The content of the surfactant is preferably 0.1 to 5% by mass, more preferably 0.5 to 2% by mass.
If the content of the surfactant exceeds 5% by mass, it becomes difficult to maintain uniform transparency in appearance, and if it is less than 0.1% by mass, it becomes difficult to sufficiently remove stains.
The content of the surfactant when a plurality of types of surfactants are contained is determined as the total amount thereof.

The alkaline cleaning agent composition of the present invention may further contain a chelating agent.
The chelating agent is not particularly limited, and examples thereof include a hydroxycarboxylic acid type, an aminocarboxylic acid type, a phosphonic acid type, a phosphoric acid type, and an ethercarboxylic acid type, and these may be used in combination. Among these, a hydroxycarboxylic acid-based chelating agent and an aminocarboxylic acid-based chelating agent are preferable.

Examples of the hydroxycarboxylic acid-based chelating agent include malic acid, citric acid, lactic acid, tartaric acid, gluconic acid or salts thereof, and one or more of these can be used.

Examples of aminocarboxylic acid-based chelating agents include ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid (NTA), methylglycine diacetic acid (MGDA), diethylenetriaminetetraacetic acid (DTPA), hydroxyethylethylenediaminetriacetic acid (HEDTA), and triethylene. Tetramine hexaacetic acid (TTHA), glutamate diacetic acid (GLDA), hydroxyethyliminodiacetic acid (HIDA), dihydroxyethylglycine (DHEG), 1,3-propanediaminetetraacetic acid (PDTA), 1,3-diamino-2- Examples thereof include hydroxypropanehexacetic acid (DPTA-OH), diacetic acid aspartate (ASDA), ethylenediaminesuccinic acid (EDDS) or salts thereof, and one or more of these can be used.

Examples of the phosphonic acid-based chelating agent include hydroxyetidronic acid phosphonic acid (HEDP), nitrilotrimethylenephosphonic acid (NTMP), phosphonobutanetricarboxylic acid (PBTC), ethylenediaminetetramethylenephosphonic acid (EDTMP), and the like. Seeds or two or more can be used.
At least a part of the phosphonic acid portion of the chelating agent may be a salt.

Examples of the phosphoric acid-based chelating agent include tripolyphosphoric acid, hexametaphosphoric acid, salts thereof and the like, and one or more of these can be used.

Examples of the salt in the chelating agent include salts of alkali metals such as potassium and sodium; and salts of alkaline earth metals such as magnesium and calcium. Of these, alkali metal salts are preferable, and sodium salts or potassium salts are more preferable.
Further, the chelating agent and the salt of the chelating agent may be mixed in the alkaline cleaning agent composition, and when the chelating agent is contained in the alkaline cleaning agent composition, sodium ions or the like are added thereafter. It may be salt.

The content of the chelating agent is not particularly limited, but is preferably 0.01 to 2% by mass. The content of the chelating agent when a plurality of types of chelating agents are contained is determined as the total amount thereof.

The alkaline cleaning agent composition of the present invention may further contain a metal corrosion inhibitor.
Examples of the metal corrosion inhibitor include sulfur-containing compounds such as nitrite, silicate, phosphate, carboxylate, and sulfonate, nitrogen-containing compounds, and the like, and one or more of these can be used. ..

When the alkaline cleaning agent composition of the present invention further contains a metal corrosion inhibitor, the content of the metal corrosion inhibitor is preferably 0.01 to 5% by mass, preferably 0.02 to 1% by mass. Is more preferable.
The content of the metal corrosion inhibitor when a plurality of types of metal corrosion inhibitor is contained is determined as the total amount.

The alkaline cleaning agent composition of the present invention may further contain an alkaline agent other than the alkali metal hydroxide.
Examples of alkaline agents other than alkali metal hydroxides include sodium carbonate, potassium carbonate, sodium sesquicarbonate, sodium hydrogencarbonate, potassium hydrogencarbonate, monoethanolamine, diethanolamine, triethanolamine, propanolamine and the like. One or more of the above can be used.

The alkaline cleaning composition of the present invention usually further contains water.
Water is blended as a residue other than other components, and its content is not particularly limited. The water is not particularly limited, and examples thereof include tap water, distilled water, pure water, ion-exchanged water, and the like, and one or more of these can be used.

The alkaline cleaning composition of the present invention may contain various additives such as a solubilizer, an antioxidant, a pigment, a fragrance, and a preservative in addition to those described above as other components.

The alkali cleaning agent composition of the present invention preferably has a viscosity at 20 ° C. of 100 mPa · s or more, more preferably 500 mPa · s or more, and even more preferably 1000 mPa · s or more. Further, the viscosity is preferably 50,000 mPa · s or less, more preferably 25,000 mPa · s or less, and further preferably 4000 mPa · s or less.
When the viscosity of the alkaline cleaning agent composition of the present invention at 20 ° C. is 100 mPa · s or more, it is difficult to run off when it adheres to the surface to be cleaned, and the contact time with dirt can be lengthened. The detergency of the cleaning agent composition can be further enhanced. Further, when the viscosity is 50,000 mPa · s or less, the alkaline cleaning agent composition of the present invention can be easily prepared.
As described above, the viscosity of the alkaline cleaning agent composition can be measured by using an E-type viscometer in accordance with JIS Z 8803.
The liquid temperature at the time of measurement is 20 ° C., and the rotation speed of the viscometer is 1 rpm.

In other words, the alkaline cleaning agent composition of the present invention is a liquid cleaning agent composition. As described above, the alkaline cleaning agent composition of the present invention includes a highly viscous composition. That is, the alkaline cleaning agent composition of the present invention contains a gel-like high-viscosity product.

The alkaline cleaning agent composition of the present invention preferably has a pH of 12 or more, more preferably 12.5 or more, and even more preferably 13 or more.
By using the alkaline cleaning agent composition of the present invention as a strongly alkaline cleaning agent composition having a high pH, an alkaline cleaning agent composition having a high detergency against oil stains can be obtained.
The pH may be measured using a commercially available pH meter or the like, and for example, it can be measured using a D-21 type manufactured by HORIBA, Ltd.

The alkaline cleaning agent composition of the present invention can be produced by any method.
For example, an alkali metal hydroxide, a thickener, a solvent having an SP value of 10.6 or more, and if necessary, other components may be added to the container and mixed by stirring. Usually, water is mixed together to adjust the pH and viscosity of the alkaline cleaning agent composition.

The alkaline cleaning agent composition of the present invention can be used for cooking utensils such as pots and grills used at home, Gotoku, walls and floors in kitchens, especially ventilation fans and walls around stoves, restaurants, kitchens such as hotels, supermarkets, and food factories. , Can be used for cleaning food manufacturing / processing / cooking equipment, etc. Among them, because it has excellent adhesion to the surface to be cleaned, especially kitchen and kitchen walls, cooking utensils and Gotoku, food manufacturing / processing / It has a high detergency for the side surface of a cooking device or the like.
That is, the alkaline cleaning agent composition of the present invention is suitably used for a surface to be cleaned, such as a vertical surface or an inclined surface, on which a liquid easily flows down.
Examples of the material of the object to be cleaned include stainless steel, cast iron, steel, stainless steel, galvanized steel sheet, aluminum, pottery, and plastic.
Examples of stains to be cleaned with the alkaline cleaning agent composition of the present invention include stains mainly on oil stains adhering to pots, stoves, trivets and the like used in kitchens, restaurants, hotels and the like at home. In addition to oil stains, protein stains and starch stains may be mixed.

The alkaline cleaning agent composition of the present invention may be applied to an object to be cleaned and used, or may be sprayed onto the object to be cleaned using a spray gun or the like. The alkaline cleaning agent composition of the present invention is usually used as it is without being diluted.
Since the alkaline cleaning composition of the present invention has an appropriate viscosity and good contact with dirt is maintained, the alkaline cleaning composition is sprayed on the dirt and left for a while. If it is wiped off, dirt removal can be promoted.
Further, the alkaline cleaning agent composition of the present invention may be applied to a sponge, a waste cloth or the like, and the object to be cleaned may be wiped with the sponge or the waste cloth.

Examples of the present invention will be described in more detail below, but the present invention is not limited to these examples. In the examples, “parts” means “parts by mass” and “%” means “% by mass” unless otherwise specified.

<Examples 1 to 14, Comparative Examples 1 to 3>
(Preparation of alkaline cleaning agent composition)
Each component was mixed according to the formulation shown in Table 1 to obtain an alkaline cleaning agent composition according to each Example and Comparative Example.
In addition, all the components shown in the table are weights converted to pure content, and the following components were used as each component.
Sodium hydroxide: Made by Osaka Soda Co., Ltd. Liquid caustic soda Potassium hydroxide: Made by Sankyo Kasei Co., Ltd. Liquid caustic calixanthan gum: Made by Cargill Japan Limited SATIAXANE CX930
Daiyu Tangham: KELCO-VIS DG manufactured by Sansho Co., Ltd.
Welan Gum: Sansho Co., Ltd. Welan Gum BG3810
Guar gum: SUPERGEL 200 manufactured by Sansho Co., Ltd.
Polyethylene glycol (SP value: 10.70): Triethylene glycol 1-propanol manufactured by Tokyo Kasei Co., Ltd. (SP value: 11.84): 1-propanol ethanol manufactured by Tokyo Kasei Co., Ltd. (SP value: 12.58) : Yoneyama Yakuhin Kogyo Co., Ltd. Ethanol (99.5v / v%)
Propylene glycol (SP value: 15.91): 1,2-propanediol glycerin manufactured by Tokyo Kasei Co., Ltd. (SP value: 20.02): Glycerin dipropylene glycol monopropyl ether manufactured by Tokyo Kasei Co., Ltd. (SP value: 10.00): Propylene Diglycol SS manufactured by Nippon Emulsifier Co., Ltd.
3-Methoxy-3-methylbutanol (SP value: 10.49): manufactured by Tokyo Kasei Co., Ltd. 3-Methoxy-3-methylbutanol diethylene glycol monobutyl ether (SP value: 10.51): manufactured by Tokyo Kasei Co., Ltd. Diethylene glycol Monobutyl Ether Polyoxyethylene Alkyl Ether: Aoki Oil & Fat Industry Co., Ltd. Fine Surf TD-100
Ethylenediaminetetraacetic acid, 4-sodium: manufactured by Tokyo Kasei Co., Ltd. Ethylenediaminetetraacetic acid tetrasodium tetrahydrate sodium gluconate: manufactured by Fuso Chemical Industry Co., Ltd. Sodium gluconate sodium metasilicate: manufactured by Nippon Kagaku Co., Ltd. Sodium metasilicate water : Ion exchanged water

(Measurement of pH)
The pH of each alkaline cleaning agent composition immediately after the preparation of each Example and Comparative Example was measured using a pH meter (manufactured by HORIBA, Ltd., D-21 type). The results are shown in Table 1.

(Evaluation of cleaning power)
After using each of the alkaline cleaning agent compositions immediately after the preparation of each example and comparative example at home for one year, 1 mL was applied to the entire surface of the trivet to which the burnt stains had adhered to a surface area of 5 cm ^{2 and} contacted for 4 hours. After that, it was rinsed with running water and the degree of dirt removal was visually evaluated. The trivet has a complicated shape, and its surface includes a horizontal surface, an inclined surface, and a vertical surface.

<Evaluation criteria>
⊚: After 4 hours of contact, 75% or more of burnt stains can be removed. ○: After 4 hours of contact, 50% or more of burnt stains can be removed and less than 75%. Is

(Viscosity evaluation)
The viscosity of each alkaline cleaning agent composition immediately after preparation of each Example and Comparative Example was measured using an E-type viscometer in accordance with JIS Z 8803. The liquid temperature at the time of measurement was 20 ° C., and the rotation speed of the viscometer was 1 rpm.
The alkaline cleaning agent composition of Comparative Example 3 had high turbidity, and its viscosity could not be evaluated appropriately.

(Evaluation of sagging property)
0.5 mL of each alkaline cleaning agent composition immediately after the preparation of each Example and Comparative Example was added dropwise to a vertically erected stainless steel plate, and the time required for the alkali cleaning agent composition to drip 10 cm was measured to calculate the falling speed.

<Evaluation criteria>
⊚: Dripping speed is less than 10 cm / min ○: Dripping speed is 10 cm / min or more, less than 20 cm / min ×: Dripping speed is 20 cm / min or more

(Appearance evaluation)
Turbidity measurement was performed on each alkaline cleaning agent composition immediately after the preparation of each Example and Comparative Example. The appearance is evaluated by the numerical value of turbidity. The results are shown in Table 1.
The turbidity of each test solution was measured using an ultraviolet-visible near-infrared spectrophotometer (model number: V-670DS, manufactured by JASCO Corporation) and a spectrophotometer cell 10 mm.

<Evaluation criteria>
〇: Turbidity is less than 150 degrees (formazine).
X: The turbidity is 150 degrees (formazine) or more.

From the results in Table 1, the alkaline cleaning agent composition of each example contains an alkali metal hydroxide, a thickener, and a solvent having an SP value of 10.6 or more in a predetermined mass ratio, respectively, to the surface to be cleaned. It can be seen that the adhesiveness is excellent and the detergency is high. On the other hand, the cleaning agent composition of Comparative Example 1 did not contain an alkali metal hydroxide, so that the cleaning power was not sufficient. Further, since the alkaline cleaning agent composition of Comparative Example 2 does not contain a thickener, the adhesiveness to the surface to be cleaned is not sufficient, and although a certain cleaning power is recognized, the inclined surface of the trivet And dirt tended to remain on the vertical surface, and the cleaning result was uneven. Further, although the alkali cleaning agent composition of Comparative Example 3 contains an alkali metal hydroxide and a thickener, it does not contain a solvent having an SP value of 10.6 or more, so that the alkali metal hydroxide and the thickener are not included. The agent could not be sufficiently dissolved, the appearance was inferior, the adhesiveness to the surface to be cleaned was not sufficient, and the detergency was not sufficient.

Claims (6)

It is characterized by containing 0.1 to 30% by mass of an alkali metal hydroxide, 0.01 to 5% by mass of a thickener, and 0.1 to 50% by mass of a solvent having an SP value of 10.6 or more. Alkaline cleaning agent composition to be used. The alkaline cleaning agent composition according to claim 1, which has a viscosity at 20 ° C. of 100 mPa · s or more. The alkaline cleaning composition according to claim 1 or 2, wherein the pH is 12 or more. The alkaline cleaning agent composition according to any one of claims 1 to 3, wherein the solvent is a glycol solvent and / or an alcohol solvent. The alkaline cleaning agent composition according to any one of claims 1 to 4, wherein the thickener is a polysaccharide thickener. The alkaline cleaning composition according to claim 5, wherein the polysaccharide thickener is at least one selected from the group consisting of xanthan gum, carrageenan, guar gum, pectin and glucomannan.