JP2013053182A - Detergent composition for alumite - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detergent composition for alumite, which shows excellent detergency to protein stain, is excellent in corrosion resistance to alumite, and is excellent in storage stability.SOLUTION: The detergent composition for alumite comprises: (A) alkanolamine; (B) an aliphatic carboxylic acid and/or its salt; (C) and a polycarboxylic acid and/or its salt, wherein each of (A), (B), and (C) are contained in the corresponding amount (mass%) within a specific range.

Description

  The present invention relates to an alumite cleaning composition that can efficiently clean and remove contaminants adhering to a surface without corroding a substrate with respect to an apparatus or instrument using anodizing.

  Anodized aluminum and its alloys are treated with anodized film and are used as materials for various precision equipment such as food processing equipment, cooking utensils, medical utensils, aircrafts and semiconductors because of their high processability and light weight. . Of these, food processing equipment, cooking utensils, medical utensils and the like are particularly easily contaminated with proteins, lipids, and the like during use. If these stains adhered to the surface of the substrate during cleaning remain after cleaning, there is a concern about the risk of causing bacterial growth and disinfecting the disinfectant, resulting in food poisoning and nosocomial infection. For these reasons, in general, an alkaline detergent that can provide a high detergency to proteins and lipids is often used for such instruments.

  However, on the other hand, it is known that aluminum-based metals such as anodized easily corrode under alkaline conditions. For example, Patent Document 1 discloses a medical device cleaning composition containing a polyoxyethylene-polyoxypropylene block polymer, a polyoxyalkylene alkyl ether, an alkanolamine, and an inorganic alkaline agent. When the cleaning agent is repeatedly used for cleaning an instrument containing alumite, the metal portion is gradually corroded.

  As a technique for preventing such corrosion, a method in which a silicate is used together as in the cleaning composition for cooking equipment disclosed in Patent Document 2 is common. However, it is known that silicate adheres as a scale to the target surface and inhibits cleaning.

  On the other hand, Patent Document 3 discloses a container cleaning composition that suppresses corrosion of aluminum by combining an alkali hydroxide with an aliphatic carboxylic acid, a sequestering agent, a surfactant, and a polymer. .

JP 2009-144070 A JP 2001-323299 A JP 2006-335896 A

  In the cleaning composition described in Patent Document 3, it is not possible to obtain a sufficient detergency especially for protein-containing stains, while trying to increase the amount of alkali in order to increase the detergency against such stains. Then, it turned out that the corrosion with respect to alumite cannot fully be suppressed.

  That is, an alkaline detergent for anodized aluminum that has a good detergency against protein-containing soils and is excellent in corrosion resistance has not been found so far. In addition, it is desired to improve the storage stability of an alkaline cleaner for anodized aluminum having such an effect.

  An object of the present invention is to provide a detergent composition for alumite that exhibits good detergency against soils containing proteins, is excellent in anticorrosive properties against alumite, and is excellent in storage stability.

  The present invention comprises (A) 2.5-30% by mass of alkanolamine, (B) 0.5-20% by mass of aliphatic carboxylic acid and / or salt thereof, and (C) polycarboxylic acid and / or A detergent composition for alumite containing 0.05 to 5% by mass of the salt, wherein the mass ratio (A) / (C) of the content of the component (A) and the content of the component (C) is 5 to 600. About.

  Moreover, this invention relates to the washing | cleaning liquid which diluted the cleaning composition for alumite of this invention 10 to 1000 times with water.

  Moreover, this invention relates to the washing | cleaning method of an alumite instrument using the washing | cleaning liquid of the said invention.

  ADVANTAGE OF THE INVENTION According to this invention, the detergent composition for alumite which shows the favorable detergency with respect to the stain | pollution | contamination containing a protein, is excellent in the anticorrosion property with respect to alumite, and was excellent in storage stability is provided. The detergent composition for alumite of the present invention exhibits excellent storage stability in a wide temperature range.

<Anodized>
In the present invention, alumite is obtained by anodizing the surface of aluminum or its alloy. Examples of the anodic oxide film treatment include treatment by electrolysis using aluminum or an alloy thereof as an anode and dilute sulfuric acid or the like in a treatment bath.

  The cleaning composition of the present invention is for anodized, and is specifically applied to various articles containing anodized. Articles containing alumite include, but are not limited to, those comprising aluminum or an aluminum alloy on which an anodized film is formed, but are not limited to food processing equipment, beverage filling equipment, and beverage processing equipment. Examples include constituent articles, food processing equipment constituent articles, cooking equipment constituent articles, vehicles, aircraft, medical instruments, containers, and semiconductor substrates. Furthermore, an anodized instrument is mentioned as an article | item containing anodized, for example. More preferably, a component of a facility selected from a beverage processing facility, a food processing facility, and a cooking facility, and a medical instrument are included. Examples of the medical instrument include a flexible endoscope configured to include an alumite member.

<(A) component>
The anodizing detergent composition of the present invention contains an alkanolamine as the component (A).

The (A) component alkanolamine exhibits an excellent washing and removing effect on proteins and lipids, and also acts as a buffering agent that suppresses a decrease in pH when the soil load increases. Examples of the alkanolamine include those represented by the general formula N (R ¹ ) (R ² ) (R ³ ). R ¹ is a hydrocarbon group having 1 to 8 carbon atoms containing 1 to 3 OH groups, and R ² and R ³ are each independently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or 1 to 1 carbon atoms. 4 alkanol groups. R ¹ is preferably a C 2-4 alkanol group, and R ² and R ³ are preferably hydrogen atoms. Examples of the alkanolamine of the general formula include monoethanolamine, monopropanolamine, monoisopropanolamine, diethanolamine, triethanolamine, N-methylpropanolamine, N-dimethylethanolamine, 2-amino-2-methyl-1-propanol. , Trishydroxyaminomethane, and the like. Among them, monoethanolamine, monopropanolamine, monoisopropanolamine, and trishydroxyaminomethane are preferable from the viewpoint of detergency, and monoethanolamine is more preferable.

  (A) Content of a component is 2.5-30 mass% in the cleaning composition for alumite of this invention from a viewpoint of the storage stability of a cleaning composition, and a cleaning power, Preferably it is 5-25. It is the range of 7.5 mass%, More preferably, it is 7.5-20 mass%. In addition, in this invention, content of (A) component shall be based on the quantity converted into the amine type compound.

<(B) component>
The cleaning composition for alumite of the present invention contains an aliphatic carboxylic acid and / or a salt thereof as the component (B).

  Examples of the aliphatic carboxylic acid include carboxylic acids having 6 to 18 carbon atoms, for example, carboxylic acids having 6 to 18 carbon atoms having a linear alkyl group or a branched alkyl group. Among these, from the viewpoints of detergency, anodized anticorrosion and storage stability of the composition, a carboxylic acid having 8 to 12 carbon atoms, and further a carboxylic acid having 8 to 12 carbon atoms having a linear alkyl group or a branched alkyl group is preferable. N-octanoic acid, n-nonanoic acid, n-decanoic acid, n-undecanoic acid, n-dodecanoic acid, 2-ethylhexanoic acid, and 3,5,5-trimethylhexanoic acid are more preferred, and n-decanoic acid 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid are more preferred. In particular, n-decanoic acid and 3,5,5-trimethylhexanoic acid are preferable, and 3,5,5-trimethylhexanoic acid is more preferable. These fatty acids may be used alone or in combination of two or more.

  Examples of the counter ions in these aliphatic carboxylic acid salts include alkali metals, quaternary ammoniums, alkanolamines, etc., but alkali metals or alkanolamines are preferred from the viewpoint of storage stability and anodized anticorrosion of the composition, Sodium, potassium and monoethanolamine are most preferred.

  The content of component (B) is 0.5 to 20% by mass in the anodizing detergent composition of the present invention from the viewpoints of detergency against contaminants, anticorrosive properties, and storage stability of the composition, preferably It is 1-15 mass%, More preferably, it is the range of 2.5-10 mass%. In addition, in this invention, content of (B) component shall be based on the quantity converted into the acid type compound.

<(C) component>
The cleaning composition for alumite of the present invention contains polycarboxylic acid and / or a salt thereof as component (C).

  The polycarboxylic acid is preferably at least one selected from the group consisting of unsaturated carboxylic acids, especially polymers comprising monomers selected from acrylic acid, methacrylic acid and maleic acid as constituent units. Further, from the viewpoint of anodized anticorrosive properties, it is preferably at least one selected from the group consisting of polymers comprising monomers selected from acrylic acid and maleic acid as structural units. Acrylic acid homopolymer, maleic acid homopolymer Particularly preferred is at least one selected from the group consisting of copolymers of acrylic acid and maleic acid, and copolymers of olefins copolymerizable with maleic acid represented by the following general formula (c1).

[Wherein, R ^1c , R ^2c , R ^3c and R ^4c each independently represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, a phenyl group, an alkoxy group, or a carboxyl group, and M represents each independently. And a hydrogen atom, an alkali metal, a quaternary ammonium, or an alkanolamine. x / y (x / y (molar ratio)) is 1/10 to 10/1. ]

  Examples of the salt of these polycarboxylic acids include alkali metal salts, quaternary ammonium salts, alkanolamine salts, and the like, but alkali metal salts or alkanolamine salts are preferable from the viewpoint of storage stability of the composition.

  As a commercially available polycarboxylic acid and / or a salt thereof, for example, trade name Sokalan (BASF) and trade name Aquaric (Nippon Shokubai Co., Ltd.) are available.

  The polyacrylic acid and / or salt thereof as component (C) has a weight average molecular weight of 1,000 to 50,000, more preferably 1,500 to 20,000, particularly from the viewpoint of alumite anticorrosion and storage stability of the composition. The thing of about 2,000-15,000 is preferable.

  The weight average molecular weight was determined by gel permeation chromatography using polyethylene glycol as a standard substance using a mixed solvent of acetonitrile and water (phosphate buffer) as a developing solvent.

  The content of the component (C) is 0.05 to 5% by mass, preferably 0.1 to 2%, in the anodizing detergent composition of the present invention from the viewpoint of anodized anticorrosive properties and the storage stability of the composition. It is the range of 0.2 mass%, More preferably, it is 0.2-1 mass%.

  In the alumite cleaning composition of the present invention, the mass ratio (A) / (C) of the component (A) to the component (C) is 5 to 600 from the viewpoint of the storage stability of the composition and the alumite anticorrosive property. 10 to 500, and more preferably 20 to 100. From the same viewpoint, the mass ratio (B) / (C) between the component (B) and the component (C) is preferably 2 to 200. Furthermore, (B) / (C) is preferably 5 to 100, more preferably 8 to 50, and particularly preferably 9 to 19. In particular, from the viewpoint of detergency and anodized anticorrosion, when (B) component is trimethylhexanoic acid (particularly 3,5,5-trimethylhexanoic acid), (A) / (C) is 20 to 100. And (B) / (C) is preferably 9-19.

<(D) component>
The anodizing detergent composition of the present invention preferably contains a surfactant as the component (D) from the viewpoint of preventing redeposition of dirt on the substrate surface.

  Examples of the surfactant include nonionic surfactants, anionic surfactants, cationic surfactants, and amphoteric surfactants. From the viewpoint of preventing the reattachment of dirt to the substrate surface, nonionic interfaces are exemplified. Activators are particularly preferred.

  Nonionic surfactants include polyoxyalkylene alkyl ether, polyalkylene glycol, alkylamine oxide, polyoxyalkylene alkyl phenyl ether, fatty acid polyoxyethylene ester, fatty acid sorbitan ester, fatty acid, polyoxyalkylene sorbitan ester, fatty acid saccharide ester, Examples thereof include alkyl polysaccharides, alkyl glyceryl ethers, fatty acid alkanolamides, and one or more non-ions selected from the group consisting of polyoxyalkylene alkyl ethers, polyalkylene glycols, and alkylamine oxides from the viewpoint of preventing soil redeposition. A surfactant is preferred, and one or more nonionic surfactants selected from the group consisting of polyoxyalkylene alkyl ethers are more preferred.

Suitable polyoxyalkylene alkyl ethers include polyoxyalkylene alkyl ethers represented by the following general formula (d1).
RO-[(EO) ₁ / (PO) _m ] -H (d1)
(R is a straight-chain alkyl group or branched alkyl group having 6 to 18 carbon atoms, EO represents an ethanediyloxy group, PO represents a propanediyloxy group, and l and m represent the average number of moles of EO and PO added. L and m are each independently a number from 0 to 20. l and m cannot be 0 at the same time, “/” is a symbol indicating that EO and PO may be random or block. The order of adding PO and PO does not matter.)

  0.1-20 mass% is preferable in the detergent composition for alumite of this invention, as for content of surfactant, 0.5-15 mass% is more preferable, More preferably, it is the range of 1-10 mass%. It is.

<(E) component>
The anodizing detergent composition of the present invention can contain a sequestering agent as the component (E) from the viewpoint of increasing the detergency.

  As the sequestering agent, any of aminocarboxylic acid, organic acid, phosphonic acid, and phosphoric acid can be used. For example, nitrilotriacetic acid, iminodiacetic acid, ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, glycol etherdiaminetetraacetic acid, hydroxyethyliminodiacetic acid, triethylenetetraaminehexaacetic acid, diencoric acid, methylglycine diacetic acid, aspartic acid diacetic acid, Aminocarboxylic acids such as glutamic acid diacetic acid or salts thereof, glycolic acid, oxydisuccinic acid, carboxymethyloxysuccinic acid, citric acid, lactic acid, tartaric acid, oxalic acid, malic acid, gluconic acid, carboxymethylsuccinic acid, carboxymethyltartaric acid, Organic acids such as glutamic acid diacetic acid or salts thereof, aminotri (methylenephosphonic acid), 1-hydroxyethylidene-1,1-diphosphonic acid, ethylenediaminetetra (methylenephosphonic acid), diethylenetriaminepe Phosphonic acid or a salt thereof, such as data (methylene phosphonic acid), phosphoric acid or its salts such as tripolyphosphate and the like. Of these, ethylenediaminetetraacetic acid, methylglycine diacetic acid, glutamic acid diacetic acid, glycolic acid, citric acid, tartaric acid or salts thereof are preferred, and ethylenediaminetetraacetic acid is particularly preferred from the viewpoints of improved detergency and anodized anticorrosive properties. In addition, examples of the counter ion of these salts include alkali metals, quaternary ammoniums, alkanolamines, etc., but alkali metals or alkanolamines are preferable from the viewpoint of storage stability and anodized anticorrosion of the composition, and sodium, potassium Monoethanolamine is most preferred.

  Content of a sequestering agent is 0.1-40 mass% in the cleaning composition for alumite of this invention, Preferably it is 0.5-30 mass%, More preferably, it is the range of 1-20 mass%. It is.

<(F) component>
The anodizing detergent composition of the present invention can contain an enzyme as the component (F) from the viewpoint of increasing the detergency. The enzyme is not particularly limited as long as it contributes to an improvement in detergency, and examples thereof include hydrolase and oxidoreductase. From the viewpoint of improving detergency, a hydrolase is particularly preferable, among which protease, amylase, lipase and cellulase are preferable, and protease, particularly alkaline protease is most preferable.

  The alkaline protease is preferably any protease as long as it has an optimum pH from neutral to alkaline, and a plurality of alkaline proteases satisfying this condition can be used in combination. The alkaline protease is preferably a subtilisin protease derived from Bacillus SP, and among them, a subtilisin protease derived from Bacillus Halodurans or Bacillus clausii is preferred. Examples of commercially available alkaline proteases include Alcalase, Sabinase, Evalase, Esperase, Cannase, Ovozyme, and Perfect, Properase available from Genencor International, available from Novozymes Japan. Further, KAP which is an alkaline protease available from Kao including the enzyme described in JP-A-2007-61101 can also be suitably used.

  The content of the hydrolase is preferably 0.5 to 30% by mass, more preferably 1 to 20% by mass in the composition of the present invention.

<Optional component>
The anodizing detergent composition of the present invention is a solvent, hydrotrope agent, dispersant, pH adjuster, thickener, viscosity adjuster, fragrance, colorant, antioxidant as long as the object of the present invention is not impaired. , Preservatives, foam inhibitors, bleaches, bleach activators, etc. (however, those not corresponding to the components (A) to (E)) can be blended.

  The anodizing detergent composition of the present invention preferably has a low alkaline earth metal content from the viewpoint of preventing detergency from being reduced and preventing scale precipitation. Alkaline earth metals may be present in the composition as salts, ions, etc., but as alkaline earth metal atoms, 0.1% by weight or less, further 0.01% by weight or less, and even more contained in the composition. Preferably not. Especially in this invention, it is preferable that the quantity of calcium and / or magnesium is the said range.

  The anodizing detergent composition of the present invention is a liquid composition containing water. The pH of the cleaning composition for alumite of the present invention is preferably 9 to 13, more preferably 10 to 12.5, and more preferably 10.5 to 12 at 25 ° C. from the viewpoints of detergency and anticorrosion.

<Cleaning solution for anodized equipment>
In the present invention, by using the cleaning liquid in which the components (A), (B), and (C) coexist, the soil containing the protein adhering to the surface and the like is sufficiently removed without corroding the anodized tool. can do.

  The cleaning solution for an alumite device of the present invention is not particularly limited, but is preferably prepared by diluting the cleaning composition with water to a required concentration before application to the object or at the time of application to the object. . The dilution factor can be selected from 10 times to 1000 times, preferably 50 times to 500 times. The method for preparing the cleaning liquid is not limited to this, but it is an automated or non-automated method, a mechanized or non-mechanized method, a combination of these methods, for example, manual preparation, or the required concentration by an automatic washer. Automatic preparation. Therefore, the cleaning liquid of the present invention is obtained by diluting the composition of the present invention 10 to 1000 times, preferably 50 to 500 times with water. In the cleaning liquid of the present invention, the content of the component (A) is preferably 0.01 to 1.0 mass%, more preferably 0.01 to 0.1 mass%, and the content of the component (B) is 0.005. -0.5 mass%, more preferably 0.01-0.1 mass%, and the content of component (C) is 0.0001-0.1 mass%, further 0.001-0.05 mass%. preferable. Moreover, the cleaning liquid of the present invention may satisfy the mass ratio of the components (A) to (C) in the above-described composition of the present invention.

  The pH of the cleaning liquid in the present invention is 9 to 12, more preferably 9.5 to 11.5, and more preferably 10 to 10 at 25 ° C. from the viewpoint of detergency and anodized anticorrosion. 11 is preferable.

<How to clean anodized equipment>
The cleaning liquid of the present invention is used for cleaning an alumite instrument. Specifically, cleaning is performed by bringing the cleaning liquid of the present invention into contact with an alumite instrument. The contact with the cleaning liquid is performed so as to come into contact with the site of the alumite device as described above, and the site can be applied to the site by a method such as coating, dipping, or spraying. Suitable alumite utensils to be cleaned include, but are not limited to, food processing equipment, beverage filling equipment, beverage processing equipment components, food processing equipment components, cooking equipment components, medical instruments, etc. Is mentioned. In addition, a vehicle, an aircraft, a container, a semiconductor substrate, or the like that includes an anodized member can be a cleaning target as an anodized instrument. More preferably, a component of a facility selected from a beverage processing facility, a food processing facility, and a cooking facility, and a medical instrument are included. Examples of the medical instrument include a flexible endoscope configured to include an alumite member. The temperature of the cleaning liquid is preferably 5 to 95 ° C, more preferably 10 to 50 ° C. The pH of the cleaning liquid is preferably in the same range at this cleaning temperature. When washing by immersion, the immersion time is preferably 1 to 60 minutes, and more preferably 1 to 20 minutes.

  A detergent composition for alumite shown in Table 1 was prepared, and the cleaning power, anodized anticorrosive properties and storage stability against protein-containing soil were evaluated by the following methods. The details of the various components used in Table 1 are as follows. (All compositions in Table 1 are based on the effective concentration.)

Monoethanolamine: Wako Pure Chemical Industries, Ltd. KOH: Wako Pure Chemical Industries, Ltd. Trimethylhexanoic acid: Wako Pure Chemical Industries, Ltd. 2-ethylhexanoic acid: Wako Pure Chemical Industries, Ltd. n-decanoic acid: Wako Pure Chemical Industries, Ltd. Polyacrylic acid 1: Trade name “AQUALIC YS100”, Nippon Shokubai Co., Ltd. (Polyacrylic acid sodium salt, pure 45%, molecular weight 5500)
Polyacrylic acid 2: Trade name “Socaran CP9” manufactured by BASF (olefin / maleic acid copolymer sodium salt, pure 25% molecular weight 12000)
・ Nonionic surfactant 1: Trade name "Pull lafaf LF901", manufactured by BASF (polyoxyalkylene alkyl ether, pure 100%)
・ EDTA ・ 4Na: Trade name “Clavion TS”, manufactured by Tozai Oil Co., Ltd. ・ Protease 1: Trade name “Everase 16L Type EX”, manufactured by Novoenzyme

<Eye yolk dirt washability>
Egg yolk stains were applied at a rate of 10 mg / cm ^{2 to} an alumite sulfate standard test plate (Japan Test Panel) and dried at 40 ° C. for 1 hour. In a 100 mL glass beaker, 80 g of a cleaning solution obtained by diluting the alumite cleaning composition to 1.0 mass% with 70 ppm (as CaCO ₃ ) artificial hard water was placed in a thermostatic bath. The dried test plate is dipped in each cleaning solution (20 ° C) for 10 minutes, and the taken test plate is rinsed with ion-exchanged water and then thoroughly dried at room temperature (25 ° C) to visually determine the remaining dirt. did.

Criterion 4: No residue of dirt is observed at all. 3: There is almost no residue of dirt, but a very small amount of dirt remains visible. 2: Visible dirt which is clearly visible remains about half. 1: Most of the dirt remains. If the evaluation score is 3 or more, the residual quantity of the dirt is very small, so that it is at a level that does not cause any problems in re-use and is judged to have been cleaned well.

<Blood dirt detergency>
Protamine sulfate (for Novo / intravenous injection) was added to heparinized sheep blood (Kohjin-Bio) at a ratio of 15 μg / blood 1 mL and mixed well. Next, it apply | coated to the alumite sulfate standard test board (Japan Test Panel company) in the ratio of 10 mg / cm < ² >, and was dried at 40 degreeC for 1 hour. In a 100 mL glass beaker, 80 g of a cleaning solution obtained by diluting the alumite cleaning composition to 1.0 mass% with 70 ppm (as CaCO ₃ ) artificial hard water was placed in a thermostatic bath. The dried test plate was immersed in each diluted cleaning solution (20 ° C.) for 10 minutes, and the taken-out test plate was rinsed with ion-exchanged water, and then sufficiently dried at room temperature.

Criterion 4: No residue of dirt is observed at all. 3: There is almost no residue of dirt, but a very small amount of dirt remains visible. 2: Visible dirt which is clearly visible remains about half. 1: Most of the dirt remains. If the evaluation score is 3 or more, the residual quantity of the dirt is very small, so that it is at a level that does not cause any problems in re-use and is judged to have been cleaned well.

<Anodized corrosion resistance>
The anodized detergent composition was diluted with ion-exchanged water so as to be 2.0% by mass (diluted 50 times), and a 20 gwp glass screw tube No. A volume of 7 mL of 50 mL was used, and an alumite sulfate standard test plate (Nippon Test Panel Co., Ltd.) weighed in advance was stored at 40 ° C. for one day while being immersed in about half. After storage, the test plate was taken out, thoroughly washed in running water, and then sufficiently dried. The appearance of the alumite standard test plate after drying was visually observed and evaluated according to the following criteria.

Criterion 3: There is no damage in appearance, and no obvious alteration such as discoloration or peeling is observed.
2: Although there is no noticeable damage in appearance, the surface is altered and the gloss is lost.
1: The substrate surface is significantly damaged, and obvious alteration such as discoloration and peeling is observed.

<Storage stability>
20 gwp glass screw tube no. When 10 to 20 g of each composition listed in Table 1 is added to Table 6 as an evaluation sample, the sample is stored for one week in a sealed state in a thermostat set at 50 ° C, 23 ° C and -5 ° C. The change was confirmed visually.

Judgment Criteria 5: At 50 ° C., 23 ° C. and −5 ° C., no apparent change in appearance is observed after storage, and a uniform state is maintained.
4: Although it melt | dissolves uniformly after a preservation | save at 23 degreeC, clear alteration, such as white turbidity, precipitation, coloring, is recognized after a preservation | save at 50 degreeC or -5 degreeC.
3: Although it melt | dissolves uniformly after a preservation | save at 23 degreeC, obvious quality changes, such as white turbidity, precipitation, coloring, are recognized after storage at both 50 degreeC and -5 degreeC.
2: Even at 23 ° C., white turbidity, precipitation, etc. occur, and a uniform state cannot be maintained.
1: It does not melt | dissolve and a uniform composition cannot be prepared.

Claims (15)

  (A) 2.5 to 30% by mass of alkanolamine, (B) 0.5 to 20% by mass of aliphatic carboxylic acid and / or salt thereof, and (C) 0 to polycarboxylic acid and / or salt thereof. A cleaning composition for alumite containing 0.05 to 5% by mass and the mass ratio (A) / (C) of the content of the component (A) to the content of the component (C) is 5 to 600.   (A) The detergent composition for alumite according to claim 1, wherein the alkanolamine is monoethanolamine.   The cleaning composition for alumite according to claim 1 or 2, wherein the mass ratio (B) / (C) of the content of the component (B) and the content of the component (C) is 2 to 200.   The detergent composition for alumite according to any one of claims 1 to 3, further comprising (D) a surfactant.   (D) The detergent composition for alumite according to claim 4, wherein the surfactant is a nonionic surfactant.   Furthermore, the detergent composition for alumite of any one of Claims 1-5 containing (E) metal ion sequestering agent.   Furthermore, the detergent composition for alumite of any one of Claims 1-6 containing an enzyme (F).   (F) The anodizing detergent composition according to claim 7, wherein the enzyme is a protease.   (C) The polycarboxylic acid and / or salt thereof is selected from the group consisting of polyacrylic acid, polymaleic acid, acrylic acid-maleic acid copolymer, olefin-maleic acid copolymer, and / or salt thereof. It is a compound more than a seed | species, The cleaning composition for alumite in any one of Claims 1-8.   (B) A component is a trimethylhexanoic acid, The cleaning composition for alumite of any one of Claims 1-9.   A cleaning solution for an alumite device obtained by diluting the anodizing detergent composition according to any one of claims 1 to 10 with water 10 to 1000 times.   An alumite device cleaning method using the alumite device cleaning liquid according to claim 11.   The cleaning method according to claim 12, wherein the anodized device is a medical device.   The cleaning method according to claim 12, wherein the medical instrument is a flexible endoscope.   The cleaning method according to claim 12, wherein the anodized appliance is a component of equipment selected from beverage processing equipment, food processing equipment, and cooking equipment.