JP2014009355A - Pre-detergent composition for immersion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pre-detergent composition for immersion used for a pre-cleaning process of cleaning by an automatic dishwasher that is excellent in detergency to starch, fat and protein and excellent in low foaming and storage stability even without substantially including a surfactant.SOLUTION: A pre-detergent composition for immersion includes: (A) alkanolamine; (B) one or two or more chosen from an amino carboxylic acid or a salt thereof, an organic phosphonic acid or a salt thereof; (C) an enzyme; and (D) a surfactant, wherein a content of the surfactant in the composition is at most 1% by mass.

Description

  The present invention relates to a pre-soaking detergent composition suitable for pre-cleaning and pre-soaking cleaning before main cleaning of dishes with an automatic washing machine.

  Traditionally, automatic dishwashers have been used for dishwashing in hotels, restaurants, catering, hospitals, nursing homes, and school lunch facilities. It is rare. Furthermore, in recent years, alkaline detergents for dishwashers have shifted from strong alkali types to weak alkali types with a reduced amount of alkali, and further to neutral types, to supplement the detergency in main washing using these. Pre-cleaning is an important task for ensuring cleaning power and finish in dishwashing.

  In general, pre-soak cleaners are pre-soaked in sinks and mobile sinks before tableware is put on an automatic dishwasher, or an automatic dishwasher and soaking tank are integrated into a lift-up type immersion tank. Used in a three-dimensional immersion tank. As the pre-immersion detergent, a detergent composition mainly composed of an anionic surfactant such as sodium alkylbenzene sulfonate or sodium alkyl sulfate ester, or a nonionic surfactant such as polyoxyethylene alkyl ether (Patent Document 1) A cleaning composition containing a specific carboxylic acid and / or a specific inorganic salt (Patent Document 2) is disclosed.

  JP 2007-70380 A   JP 2004-196901 A

However, when the pre-soak cleaning agent contains a surfactant, the washing water in the pre-soaking foams in the washing machine when it is brought into the automatic dishwasher in the next process, which places a load on the washing machine, etc. Problems may occur. In addition, in the case of facilities that have a relatively long period of time from the bottom of the tableware to the pre-dipping operation, such as lunch facilities, this is a book that uses an automatic dishwasher to remove rice grains stuck to the tableware, starch stains such as potato starch and potatoes, etc. There was a problem that it was difficult to remove by washing alone.
The present invention has been made in view of the above circumstances, and is a pre-soaking detergent that has excellent detergency for starch, fats and oils, and has low foaming properties and storage stability even if it does not substantially contain a surfactant. An object is to provide a composition.

  As a result of intensive studies to achieve the above object, the present inventors have found that (A) alkanolamine, (B) aminocarboxylic acid or salt thereof, at least one selected from organic phosphonic acid or salt thereof, or 2 A pre-soaking detergent composition containing at least seeds, (C) an enzyme, and (D) a surfactant, wherein the surfactant content in the composition is 1% by mass or less. It has been found that by using a cleaning composition, excellent detergency can be obtained for starch, fats and oils and protein, and it is suitable for pre-soaking cleaning before main cleaning in an automatic dishwasher. .

  That is, the present invention provides <1> (A) alkanolamine, (B) aminocarboxylic acid or a salt thereof, one or more selected from organic phosphonic acid or a salt thereof, (C) an enzyme, and (D) an interface. It is the cleaning composition for pre-immersion containing an activator, Comprising: It is related with the cleaning composition for pre-immersion in which content of the said surfactant in the said composition is 1 mass% or less.

The present invention also relates to the cleaning composition for pre-immersion according to <1>, wherein <2> the enzyme (C) is amylase.
Moreover, this invention relates to the cleaning composition for pre-immersion as described in <1> and <2> whose pH in <3> 25 degreeC is 6-10.
Moreover, this invention relates to the cleaning composition for pre-immersion as described in <1> thru | or <3> which does not contain <4> said surfactant (D) substantially.

  The cleaning composition for pre-immersion of the present invention has excellent detergency for starch, fats and oils, and has a low content even when the blending amount of the surfactant is reduced or the surfactant is not substantially contained. It has excellent foamability and storage stability, and is particularly suitable for use in pre-immersion washing before washing in commercial automatic dishwashers that wash a large amount of dishes at once.

(A) Alkanolamine The component (A) of the present invention is an alkanolamine, which is monoethanolamine, diethanolamine, triethanolamine, monopropanolamine, dipropanolamine, tripropanolamine, monoisopropanolamine, diisopropanolamine, triisopropanol. An amine, N-ethyldiethanolamine, N-ethylethanolamine, N-methyldiethanolamine, N-methylethanolamine, etc. are mentioned, It can use individually by 1 type or in combination of 2 or more types. Among these, triethanolamine, monoisopropanolamine, N-ethyldiethanolamine, N-methyldiethanolamine, and N-methylethanolamine are preferable. From the viewpoint of color stability of the pre-immersion detergent composition, monoisopropanolamine, N- Ethyldiethanolamine, N-methyldiethanolamine, and N-methylethanolamine are preferable, and monoisopropanolamine and N-ethyldiethanolamine are more preferable.

  (A) The compounding quantity of a component is 5-50 mass% in a cleaning composition, Preferably it is 10-30 mass%, More preferably, it is 10-20 mass%. If it is less than 5% by mass, the protein detergency may decrease. Moreover, when it exceeds 50 mass%, the storage stability of the color tone of a cleaning composition may worsen.

(B) Aminocarboxylic acid or salt thereof, organic phosphonic acid or salt thereof As the aminocarboxylic acid of component (B) of the present invention, nitrilotriacetic acid (NTA), methylglycine diacetic acid (MGDA), ethylenediaminetetraacetic acid (EDTA) ), Diethylenetriaminepentaacetic acid (DTPA), triethylenetetraaminehexaacetic acid (TTHA), hydroxyiminodiacetic acid (HIDA), dihydroxyethylglycine (DHEG), 1,3-propanediaminetetraacetic acid (PDTA), hydroxyethylethylenediaminetrimethyl Examples include acetic acid (HEDTA), S, S-ethylenediamine disuccinic acid (EDDS), L-glutamic acid diacetic acid (GLDA), and the like. Among these, nitrilotriacetic acid (NTA), methylglycine diacetic acid (MGDA), and L-glutamic acid diacetic acid (GLDA) are preferable, and nitrilotriacetic acid (NTA) and methylglycine diacetic acid (MGDA) are more preferable.

  As the organic phosphonic acid of component (B) of the present invention, hydroxyethane diphosphonic acid (HEDP), phosphonobutane tricarboxylic acid (PBTC), nitrilotrismethylene phosphonic acid (NTMP), N, N, N ′, N ′ -Tetrakis (phosphonomethyl) ethylenediamine (EDTMP) etc. are mentioned, It can use individually by 1 type or in combination of 2 or more types. Among these, hydroxyethane diphosphonic acid (HEDP) is preferable.

(B) As a component, aminocarboxylic acid is more preferable and it is preferable to use combining aminocarboxylic acid and organic phosphonic acid from a viewpoint of stability of the color tone at the time of a preservation | save.
(B) As a salt of a component, sodium salt, potassium salt, ammonium salt, magnesium salt, calcium salt, amine salt, alkanolamine salt, etc. are mentioned. These may be used alone or in combination of two or more. Of these, sodium salts, potassium salts, amine salts, and alkanolamine salts are preferred. The component (B) is blended as an acid, and may be neutralized with a component (A) or an alkali used for pH adjustment described later in the composition to form a salt, or may be blended in advance as a salt. A commercially available salt is available and can be preferably used.

  (B) The compounding quantity of a component is 1-30 mass% in a cleaning composition, Preferably it is 2-20 mass%, 3-15 mass% is more preferable. By setting the content to 1% by mass or more, good oil and fat detergency can be obtained. Moreover, even if it mixes exceeding 30 mass%, fats and oils detergency will be leveled off and there will be no cost merit.

(C) Enzyme (C) As an enzyme, various detergent enzymes can be used. Examples of the detergent enzyme include amylase in terms of starch detergency and protease in terms of protein detergency. Specifically, as the amylase, amylase preparations available from Novozymes: trade name Termamyl 300L, Termamyl Ultra 300L, Duramyl 300L, Stainzyme 12L, Steinzyme Plus 12L, amylase preparation available from Genencore, ST Amylase preparations available from Purastar HP Am, Amano Enzyme, Inc .: trade name pullulanase Amano, amylase preparations available from Seikagaku Corporation: trade name DB-250 and the like. Product name Savinase16L, Savinase Ultra 16L, Savinase Ultra 16XL, Everlas 16L Type EX, Everase Ultra 16L, Esperase 8L, Alcalase 2.5L, Alcalase Ultra 2.5L, Liquanase 2.5L, Liquanase Ultra 2.5L, Liquorase Ultra 2.5L Examples include the names Purefect L, Perfect Prime, Properase L, and the like.

  In the present invention, amylase is preferably used for improving starch detergency. Enzymes can be used alone or in combination of two or more, but in terms of the stability of enzyme activity, it is preferable to use amylase alone.

  (C) The compounding quantity of a component is 0.01-10 mass% in a cleaning composition, Preferably it is 0.05-5 mass%, 0.1-3 mass% is further more preferable. By setting it to 0.01% by mass or more, good detergency can be obtained. Moreover, even if it mixes exceeding 10 mass%, a detergency will become flat and there is no cost merit.

(D) Surfactant The detergent composition for pre-immersion of the present invention can contain (D) a surfactant, but from the viewpoint of preventing foaming due to carry-in to machine cleaning in the next step, The content of the surfactant is 1% by mass or less, preferably 0.5% by mass or less, more preferably 0.1% by mass or less, and it is preferable that the surfactant is not substantially contained. The cleaning composition for pre-immersion of the present invention has excellent starch cleaning power, protein cleaning power, and oil cleaning power without using a surfactant as a cleaning component.
Examples of the surfactant include anionic surfactants, nonionic surfactants, and zwitterionic surfactants. When using a surfactant, a nonionic surfactant is preferred from the viewpoint of low foaming performance. Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyhydric alcohol ethylene oxide propylene oxide adduct, and glycerin ethylene oxide propylene oxide adduct.

  The pH of the cleaning composition of the present invention is 6 to 10, preferably 6 to 9, and more preferably 7 to 9. The higher the pH is, the more detergency can be obtained. However, the higher the pH, the greater the influence on the environment and safety, and the point that the object to be washed is easily eroded. Since the detergency also decreases with the decrease in the viscosity, it is preferably 7 or more. In addition, pH is measured according to JIS-Z-8802 "pH measuring method" using a pH meter at 25 degreeC.

  The cleaning composition of the present invention can be obtained by mixing the above-described components and water (remainder), and based on conventional methods.

  In the cleaning composition of the present invention, optional components other than the above components can be blended alone or in combination of two or more, as long as the effects of the present invention are not impaired. As optional components, polymer compounds (olefin / maleic acid copolymer, olefin / maleic anhydride copolymer, acrylic acid / maleic acid copolymer, polyacrylic acid, polymaleic acid and salts thereof), inorganic builder, perfume, bleach, antifoam Other components such as an agent, a corrosion inhibitor, and water can be blended.

Pre-soak cleaning The pre-soak cleaning agent is used in the washing water bath in the pre-cleaning process in which the object to be cleaned is immersed in the cleaning solution before the main cleaning process in which the machine is cleaned using an automatic dishwasher. A cleaning agent used by adding to
In the pre-cleaning step, a sink, a movable sink, a three-dimensional immersion tank, a preliminary immersion tank provided in a lift-up type automatic dishwasher, or the like is used. Some solid immersion tanks and lift-up type pre-immersion tanks have a heating function, a heat retention function, a stirring function, a jetting function, a jet water flow function, a bubbling function, and an ultrasonic function to enhance the immersion effect. If facilities with additional functions are used, more effective pre-cleaning can be expected.

Specific examples of the cleaning method include the following methods.
(I) After immersing an object to be cleaned such as tableware and cooking utensils in a washing water bath containing the pre-soaked cleaning composition of the present invention, the tableware and cooking utensils are rubbed with a sponge or the like in the washing water bath. After performing the above work, the dishes are washed with an automatic dishwasher.
(II) A method in which an object to be cleaned such as tableware and cooking utensils is immersed in a cleaning water bath containing the pre-immersion cleaning composition of the present invention, and then the extracted tableware is washed as it is with an automatic dishwasher. .
The cleaning composition of the present invention is suitable for any of the cleaning methods (I) and (II) because of its low foamability.

  In the cleaning method of the present invention, the concentration of the cleaning composition in the cleaning water bath is preferably 0.005 to 0.5 mass%, particularly preferably 0.01 to 0.3 mass%.

  The time for performing the pre-immersion step is preferably set to 1 minute to 1 hour, although it depends on the amount of dirt and the amount of processed dishes. It is preferable to set to 10 to 30 minutes from the viewpoint of dirt removal efficiency and work efficiency. The temperature in the washing water bath in the pre-immersion step is preferably set to 30 to 60 ° C. in order to effectively remove dirt. 40-60 degreeC is more preferable in order to raise the decomposition | disassembly effect | action of the starch dirt by an enzyme.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to the following Example. In the following examples, “%” indicates “% by mass” unless otherwise specified, and the amount of each component in the table is an amount converted into a pure component.

Examples 1-9, Comparative Examples 1-2
According to the components and blending amounts shown in Tables 1 and 2, (A) component, (B) component, (C) component and other components are added to ion-exchanged water in order under stirring, and each pre-soak cleaner A composition was obtained. The following evaluation was performed about the obtained cleaning composition for pre-immersion. The results are shown in Tables 1 and 2. In addition, pH was measured according to JIS-Z-8802 "pH measuring method" at 25 degreeC for a composition.

(1) Detergency <Cleaning conditions>
Cleaning was performed by the following method using the cleaning composition, and the cleaning power (starch cleaning power, fat cleaning power, protein cleaning power) of the cleaning composition was evaluated by the following methods.
Tester: Leanut type detergency tester specified in JIS-K-3362 Cleaning temperature: 50 ° C
Washing water: tap water (American hardness (CaCO3 equivalent) 60ppm)
Detergent aqueous solution: The detergent composition was diluted with water to a concentration of 0.15%.
Cleaning time: 10 minutes

(1-1) Starch detergency Disperse commercially available potato starch with tap water, heat and dissolve it in a SUS test piece so that the weight of dirt after drying becomes 0.1 to 0.2 g / 6 sheets Then, after air-drying at room temperature for 24 hours, drying at 80 ° C. for 4 hours and cooling, 6 sheets were set in the tester and washed with the detergent composition. After washing, it was dried at 80 ° C. for 1 hour, and the starch stain removal rate was measured by the weight change rate of the stain before and after washing.
In order to confirm the starch stains remaining on the slide glass after washing with the cleaning composition, the rate of removal of starch stains compared to this control was determined by using the cleaning composition without using the cleaning composition as a control. Was determined according to the following criteria.
◎: 80% or more removed on average compared to control ○: 50% to less than 80% removed on average compared to control △: 20% to less than 50% on average compared to control Removed x: On average less than 20% removed compared to control

(1-2) Oil / fat detergency Soybean oil / beef tallow / oil red / chloroform mixed at a ratio of 20 g / 20 g / 0.2 g / 120 ml, with a soil weight of 0.09 to 0.12 g / 6 After being applied to a slide glass and air-dried at room temperature for 2 hours, 6 sheets were set in the tester and washed with the detergent composition. After washing, it was air-dried for 24 hours, and the removal rate of fat and oil stains was measured by the weight change rate of the stains before and after washing.
In order to check the oil stains remaining on the slide glass after cleaning with the cleaning composition, the cleaning rate of oil stains was compared with this control, which was washed with water without using the cleaning composition. Was determined according to the following criteria.
◎: 80% or more removed on average compared to control ○: 50% to less than 80% removed on average compared to control △: 20% to less than 50% on average compared to control Removed x: On average less than 20% removed compared to control

(1-3) Protein detergency After applying 0.15 g / sheet of commercially available cream cheese to a slide glass and air-drying at room temperature for 2 hours, 6 sheets are set in the tester and washed with the detergent composition. did. After washing, it was air-dried for 24 hours, and the removal rate of fat and oil stains was measured by the weight change rate of the stains before and after washing.
In order to confirm protein stains remaining on the slide glass after washing with the detergent composition, the rate of protein stain removal compared to this control was determined by using the detergent composition without using the detergent composition as a control. Was determined according to the following criteria.
◎: 80% or more removed on average compared to control ○: 50% to less than 80% removed on average compared to control △: 20% to less than 50% on average compared to control Removed x: On average less than 20% removed compared to control

(2) Foaming 50 ml of an aqueous solution prepared to a concentration of 0.1% was put into a 100 ml Epton tube with a stopper, shaken up and down 10 times, and the presence or absence of foaming after 10 seconds was judged according to the following criteria and evaluated.
○: No foaming ×: Foaming

(3) Storage stability Each detergent composition was sealed in a 100 g glass bottle and the appearance of the liquid when allowed to stand at room temperature for 1 month was determined according to the following evaluation criteria.
○: Uniform transparency, no color change △: Uniform transparency, discoloration

In the above example, the details of the raw materials used are as follows.
-Triethanolamine; Trade name "Triethanolamine 90%" Concentration 90% product Mitsui Chemicals Co., Ltd. monoisopropanolamine; Trade name "Monoisopropanolamine" Mitsui Chemicals Fine Co., Ltd. N-ethyldiethanolamine; Amino alcohol MED ”manufactured by Nippon Emulsifier Co., Ltd., N-methyldiethanolamine; Product name“ Amino alcohol MDA ”manufactured by Nippon Emulsifier Co., Ltd., N-methylethanolamine; Product name“ Amino alcohol MMA ”manufactured by Nippon Emulsifier Co., Ltd., methylglycine Trisodium acetate (MGDA 3Na); trade name “Trilon MPowder” manufactured by BASF Japan Ltd., nitrilotriacetic acid (NTA); trade name “dissolvin AZ”, Akzo Nobel Co., Ltd., nitrilotriacetic acid trisodium (N A.3Na); trade name “LH-700” manufactured by Kirest Co., Ltd. • L-glutamic acid diacetic acid tetrasodium salt (GLDA 4Na); trade name “Disolvin GL-38” concentration 38% product manufactured by Akzo Nobel Co., Ltd./hydroxyethane Diphosphonic acid (HEDP); trade name “PH-210L” manufactured by Crest Co., Ltd .; citric acid; trade name “purified citric acid (crystal)” manufactured by Fuso Chemical Industry Co., Ltd./amylase; trade name “Stainzyme Plus 12L” Novozyme Product name “AG6202” concentration 65% product Lion Co., Ltd. sodium polyacrylate; Product name “Sokalan PA 25CL” concentration 45% product BASF Japan Co., Ltd. potassium hydroxide; product Name "95% flake potassium hydroxide" Asahi Glass Made formula company

Claims (4)

(A) alkanolamine,
(B) one or more selected from aminocarboxylic acids or salts thereof, organic phosphonic acids or salts thereof,
(C) enzyme,
(D) A pre-immersion detergent composition containing a surfactant, wherein the surfactant content in the composition is 1% by mass or less. The cleaning composition for pre-soaking according to claim 1, wherein the enzyme (C) is amylase. The cleaning composition for pre-immersion according to claim 1 or 2, wherein the pH at 25 ° C is 6 to 10. The cleaning composition for pre-soaking according to any one of claims 1 to 3, substantially free of the surfactant (D).