JP2006348181A - Liquid composition for cleaning - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid composition for cleaning, having both of oxidation action and alkaline action and also provided with sufficient stability and safety. <P>SOLUTION: The liquid composition for cleaning comprises urea, hydrogen peroxide and a chelating agent and is alkaline. Preferably, urea is 0.1-1 mol per 1 mol hydrogen peroxide, hydrogen peroxide is 3-15 wt.% per the total weight and the chelating agent is 0.1-2 wt.% per the total weight. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cleaning liquid composition and a cleaning method using the same.

  Conventionally, sodium hypochlorite has been mainly used as a stain or mold remover where bathrooms, toilets, outer walls, etc. are easily soiled and difficult to remove, or where mold is easily generated. However, when sodium hypochlorite is used to remove dirt and mold, extremely toxic chlorine gas is generated, and there is a risk of chlorine poisoning particularly in a narrow space such as a bathroom.

  On the other hand, sodium percarbonate is mainly used as a bleaching agent for generating an oxygen-based gas, but it has a difficulty in use because it is a powder.

  Moreover, the liquid agent which uses hydrogen peroxide as an active ingredient has a bleaching action, an oxidizing action, and a bactericidal action, and many bleaching agents and cleaning agents using hydrogen peroxide are known. For example, Patent Document 1 discloses a liquid bleaching detergent composition containing hydrogen peroxide and a surfactant. However, hydrogen peroxide is unstable in alkalinity, and in order to stabilize hydrogen peroxide, as shown in Tables 1 and 2 of Examples in Patent Document 1, the liquid bleach detergent composition is acidic. (For example, pH 2 to 3) was necessary.

  Patent Document 2 discloses (a) hydrogen peroxide: 1 to 6% by weight, (b) a bleach activator that is liquid at room temperature: 2 to 20% by weight, and (c) a water-soluble solvent: 1 to 50% by weight. %, (D) Water: The hard surface bleaching composition containing the remainder and having a pH in the range of 8 to 11.5 is disclosed. This hard surface bleaching composition has an alkaline pH and contains hydrogen peroxide, so it is thought that both the oxidizing and sterilizing action of hydrogen peroxide and the decomposing action of alkali can be exhibited to some extent. It is done. However, this hard surface bleaching composition is trying to stabilize hydrogen peroxide at pH 8 to 11.5 by using a water-soluble solvent, but the oxidizing power is enhanced by the component (b). Therefore, it is considered that it does not have stability that can withstand practical use.

Urea peroxide is an adduct of hydrogen peroxide / urea represented by CO (NH ₂ ) ₂ .H ₂ O ₂ . The aqueous solution of urea peroxide is almost neutral. When 1 mole of urea peroxide is decomposed, 1 mole of urea and 1 mole of hydrogen peroxide are obtained. For example, in Patent Document 3, magnesium silicate sodium: 1 to 20% by weight, urea peroxide: 10 to 25% by weight, polyhydric alcohol: 40 to 88% by weight, thickener capable of swelling in the polyhydric alcohol: A tooth bleaching agent comprising 1 to 15% by weight is disclosed.

  However, a cleaning liquid composition having both an oxidizing action and an alkali action and sufficient stability and safety has not been known.

Japanese Patent Application Laid-Open No. 07-126694 Japanese Patent Laid-Open No. 03-220298 Japanese Patent Laying-Open No. 2005-60267

  An object of the present invention is to provide a cleaning liquid composition having both an oxidizing action and an alkali action and having sufficient stability and safety.

  The present inventors have intensively studied to solve the above-mentioned problems, and can improve the stability of a cleaning liquid composition containing hydrogen peroxide and alkaline by using urea and a chelating agent. As a result, the present invention has been completed.

  That is, the present invention provides (1) a cleaning liquid composition characterized by containing urea, hydrogen peroxide and a chelating agent, and (2) a urea content of 0 per mole of hydrogen peroxide. The cleaning liquid composition according to the above (1), characterized in that it is 1 to 2 mol, (3) the hydrogen peroxide is 2 to 15% by weight based on the total amount (1) ) Or (2) the cleaning liquid composition, (4) the chelating agent is 0.1 to 2% by weight based on the total amount, (1) to (3) Liquid composition for cleaning, (5) The liquid composition for cleaning according to any one of (1) to (4) above, wherein the liquid composition for heating is used for heating (6) The cleaning liquid composition according to any one of (1) to (5).

  Further, the present invention provides (7) a bath water inlet / outlet opening on the wall surface of the bathtub connected to the bath tub with the bath water stretched in the bathtub to a level at which the bath water inlet / outlet is submerged. The cleaning liquid composition as described in (6) above, wherein the cleaning liquid composition is used by being put into a bath tub cleaning tool abutted against a wall surface of a bathtub so as to partition the periphery into a constant volume.

  Furthermore, the present invention provides (8) a main body part that can divide the inside of the bath water inlet / outlet hole that opens in the wall surface of the bathtub and communicates with the bath with a constant volume, and a cleaning provided in a part of the main body The present invention relates to a bath tub cleaning set comprising a bath tub cleaning tool having an agent inlet and the cleaning liquid composition described in (6) above.

  The cleaning liquid composition of the present invention has both an oxidizing action and an alkali action, and has sufficient stability and safety.

  The cleaning liquid composition of the present invention is a cleaning liquid composition characterized by containing urea, hydrogen peroxide, and a chelating agent and being alkaline.

  The content of hydrogen peroxide in the cleaning liquid composition of the present invention is not particularly limited, but can be 2 to 15% by weight, preferably 3 to 10% by weight, based on the total amount of the cleaning liquid composition. . Hydrogen peroxide has an oxidizing action and a bactericidal action.

  The urea content in the cleaning liquid composition of the present invention is not particularly limited as long as the effects of the present invention can be obtained. From the viewpoint of the stability of the cleaning liquid composition of the present invention, the urea content in the cleaning liquid composition is not limited. The amount can be 0.1 to 2 mol, preferably 0.5 to 1.2 mol, per 1 mol of hydrogen peroxide.

  The chelating agent in the present invention is not particularly limited as long as the effects of the present invention are not hindered. For example, alkali metal salts or lower amine salts of aldonic acids such as glyceric acid, tetronic acid, pentonic acid, hexonic acid, heptonic acid, Alkali metal salts or lower amine salts of aminocarboxylic acids such as nitrilotriacetic acid, ethylenediaminetetraacetic acid, hydroxyliminodiacetic acid, dihydroxyethylglycine, ethylenediaminediacetic acid, diethylenetriaminepentaacetic acid, triethylenetetraminehexaacetic acid, tetraethylenetetraminehexaacetic acid, Alkali metal salts or lower amine salts of oxycarboxylic acids such as tartaric acid, citric acid, malic acid, glutamic acid, aminotrimethylenephosphonic acid, hydroxyethylidene diphosphonic acid, ethylenediaminetetramethylenephosphonic acid, Alkali metal salts or lower amine salts of phosphonic acids such as ethylenetriaminepentamethylenephosphonic acid and alkanolamine salts such as ethanolamine, diethanolamine and triethanolamine, preferably gluconic acid, glucoheptonic acid, ethylenediaminetetraacetic acid, tartaric acid, citric acid Acids, alkali metal salts of hydroxyethylidene diphosphonic acid or lower amine salts, particularly preferably sodium ethylenediaminetetraacetate and sodium tartrate.

  The chelating agent sequesters trace metals in the cleaning liquid composition of the present invention, contributes to stabilization of hydrogen peroxide and the like, and also contributes to improvement of cleaning performance. The content of the chelating agent in the cleaning liquid composition of the present invention is not particularly limited, but is 0.1 to 2% by weight, preferably 0.3 to 1% by weight, based on the total amount of the cleaning liquid composition. Can do.

  The cleaning liquid composition of the present invention is alkaline. By being alkaline, the cleaning liquid composition of the present invention exhibits an excellent decomposing action against dirt such as organic matter. Further, the cleaning liquid composition of the present invention is preferably pH 8 or more, more preferably pH 9 or more, and most preferably pH 9 to 10 from the viewpoint of the balance between stability and cleaning effect as the cleaning liquid composition.

  As the alkaline agent for adjusting the cleaning liquid composition of the present invention to be alkaline, any water-soluble alkaline agent can be used. Specific examples include hydroxides of alkali metals such as sodium hydroxide and potassium hydroxide, sodium orthosilicate, sodium metasilicate, sodium sesquisilicate, No. 1 sodium silicate, No. 2 sodium silicate, No. 3 sodium silicate, etc. Salts, phosphates such as sodium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate, sodium pyrophosphate, sodium tripolyphosphate, sodium hexametaphosphate, disodium carbonate, sodium bicarbonate, dipotassium carbonate, hydrogen carbonate Examples thereof include carbonates such as potassium and borates such as sodium borate. Two or more alkali agents may be used in combination. Among these alkali agents, sodium hydroxide, potassium hydroxide, sodium orthosilicate, and sodium metasilicate are preferable, and sodium hydroxide and potassium hydroxide are more preferable.

  The cleaning liquid composition of the present invention may contain an optional component in addition to urea, hydrogen peroxide, and a chelating agent as long as the effects of the present invention are not hindered. Examples of such optional components include surfactants, stabilizers, dyes, fragrances, and the like.

  Surfactants include fatty acid soaps, alkyl sulfates, alkylbenzene sulfonates, polyoxyethylene alkyl sulfate esters, sulfosuccinic acid diester salts, alkyl diphenyl ester disulfonates, alkane sulfonates, alkyl phosphate ester salts, α -Anionic surfactants such as olefin sulfate salt and α-olefin sulfonate salt; polyoxyethylene alkyl ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester, polyoxyethylene fatty acid ester, fatty acid monoglyceride, alkylglycoside, amine Nonionic surfactants such as oxides; monoalkyltrimethylammonium salt, dialkyldimethylammonium salt, trialkylmethylammonium salt, tetraalkylan Cationic surfactants such as nium salts and alkyldimethylbenzalkonium salts; alkyldimethylcarbobetaines, alkylamidopropylcarbobetaines, alkylsulfobetaines, alkylhydroxysulfobetaines, alkylamidopropylsulfobetaines, alkylamidopropylhydroxysulfobetaines, etc. One or more selected from the amphoteric surfactants can be mentioned.

  The cleaning liquid composition of the present invention may contain an optional component as described above, but preferably does not contain a stabilizer that contributes to stabilization of the present composition in addition to urea and a chelating agent.

  The method for producing the cleaning liquid composition of the present invention is not particularly limited as long as the cleaning liquid composition of the present invention is obtained. For example, hydrogen peroxide or a peroxide that dissolves in water to generate hydrogen peroxide, urea, and a chelating agent are added to water and mixed, and then an alkaline agent is added to adjust the pH to alkaline. By this, the cleaning liquid composition of the present invention can be produced. There are no particular restrictions on the peroxide that generates hydrogen peroxide when dissolved in water, but sodium percarbonate, sodium perborate, sodium tartrate hydrogen peroxide adduct, sodium tripolyphosphate hydrogen peroxide adduct, pyrophosphoric acid Sodium hydrogen peroxide adduct, urea hydrogen peroxide adduct, sodium peroxide, calcium peroxide and the like that generate hydrogen peroxide are mentioned, hydrogen peroxide, sodium percarbonate, sodium perborate, It is preferable from the viewpoint of safety when used.

  The cleaning liquid composition of the present invention can be made into a liquid cleaning agent as it is or by adding an appropriate optional component.

  The use of the cleaning liquid composition of the present invention is not particularly limited. For example, a cleaning agent such as a cleaning agent for a bath, a cleaning agent for a washing machine, a mold removing agent for a bathroom wall, a moss removing agent for an outer wall, etc. Can be used.

  The method for using the cleaning liquid composition of the present invention is not particularly limited. For example, after the cleaning liquid composition of the present invention is in contact with the soiled portion of the object to be cleaned, It can be used by washing away the cleaning liquid composition of the present invention after or simultaneously with applying physical force to the soiled part with a water flow or the like.

  When using the washing | cleaning liquid composition of this invention as a washing | cleaning agent for washing machines, although there is no restriction | limiting in particular about a usage method, For example, it can use as follows. First, the washing machine is filled with water and an appropriate amount of the cleaning liquid composition of the present invention is added, and then the washing machine is operated for a while to stir the solution in the washing machine. After leaving for a while, the washing machine is operated, and the solution in the washing machine is sufficiently agitated to clean the washing machine. After the solution in the washing machine is drained once, the cleaning liquid composition of the present invention remaining in the washing machine is washed away using fresh water or the like.

  When the cleaning liquid composition of the present invention is used as a cleaning agent for a bath, the method of use is not particularly limited. For example, after adding the cleaning liquid composition of the present invention to water stretched in a bathtub, the bath The cleaning liquid composition of the present invention may be fed into a pipe communicating with the bath with an instrument such as bellows while the bathtub is filled with water. In addition, with the bath water stretched in the bathtub to a level where the bath water entrance / exit hole is submerged, the bath water entrance / exit hole that opens to the wall of the bathtub has a constant volume around the bath. After putting the cleaning liquid composition of the present invention into a bath tub cleaning tool abutted against the wall of the bathtub so as to partition, the bath tub may be operated and used. As such a bath tub cleaning tool, for example, by using a bath tub cleaning tool as shown in FIG. 1, the bath tub can be easily and efficiently cleaned with a small amount of cleaning liquid composition.

  Here, referring to FIG. 1, reference numeral 1 denotes a bath tub cleaning tool (hereinafter simply referred to as a cleaning tool) in the present invention. This cleaning tool 1 is attached to the wall surface of bathtub BT (bathtub). However, in this embodiment, the bath BT is provided with a bath water entrance / exit C that is open to the wall of the bathtub and communicates with an external bath (not shown), and the cleaning tool 1 is attached to the wall of the bathtub BT. In this case, the bath water entrance / exit hole C is attached so as to divide the periphery of the inside of the bathtub into a constant volume.

  When the cleaning tool 1 is attached, hot water is stretched in the bathtub BT, and the water surface W is located above the bath water entrance / exit hole C, that is, the state in which the discharge part is completely submerged. It has become. Then, when the cleaning tool 1 is attached to the wall surface of the bathtub BT in this manner, hot water enters the cleaning tool 1 and the heights of the water surfaces W inside and outside the cleaning tool 1 become the same height.

  The upper surface of the cleaning tool 1 is open (cleaning agent inlet), and the cleaning liquid composition of the present invention can be input into the cleaning tool 1 from the opening. The position, shape, number, etc. of the cleaning agent inlet are not limited as long as the cleaning agent can be supplied.

  After the cleaning liquid composition of the present invention is put into the cleaning tool, when the bath pot is operated in that state, a pump (not shown) is operated, and the solution of the cleaning liquid composition in the cleaning tool 1 is poured into the bath water. Suction from the entrance / exit hole C into the bath (see FIG. 2). When the solution of the cleaning liquid composition reaches the bath, the solution is heated to activate the cleaning liquid composition, and the generated oxygen gas removes dirt such as scales attached to the inside of the bath. And the action of alkali dissolves dirt.

  Then, the solution that has passed through the bath tub is discharged into the cleaning tool 1 from the bath water entrance / exit hole C. The solution thus discharged contains a high-concentration cleaning liquid composition, is isolated from the inside of the bathtub BT by the cleaning tool 1, and is again sucked from the bath water entrance / exit C to the bath.

  By the way, in the so-called 1-hole type bath tub provided with such bath water entrance / exit hole C, the temperature of the hot water to be sucked is monitored by a sensor, and when the temperature reaches a set temperature, the operation of the pump and the bath tub is performed. Is configured to stop automatically. Therefore, if the capacity in the cleaning tool 1 is small and the hot water temperature in the cleaning tool 1 rises in a short time, the pump and the bath tub stop before the bath is sufficiently cleaned, and the cleaning operation cannot be continued.

  In order to eliminate such a problem, the capacity of the cleaning tool 1 must be increased to some extent. However, if the capacity is increased more than necessary, the concentration of the cleaning liquid composition is lowered, so that a large amount of the cleaning liquid composition needs to be introduced. Therefore, in the present embodiment, in view of the heating capability of a general household bath tub, 0.5 to 20 liters of hot water is stored in the cleaning tool 1. This capacity is preferably set to 1 to 10 liters, more preferably 1.5 to 5 liters.

  By the way, as shown in FIG. 3, the main body portion of the cleaning tool 1 includes a frame-shaped base portion 2 and a partition wall portion 3 that is detachably attached to the base portion 2. The base portion 2 is integrally formed of a flexible resin, and suction cups 21 for attachment to the flat surface of the bathtub BT are formed at four locations. In addition, a seal portion 22 corresponding to a skirt portion slightly curved outward is formed integrally with the base portion 2 on the left and right sides and the bottom side of the base portion 2. Although the function of the seal portion 22 will be described later, the seal portion 22 constitutes an outflow structure.

  Holding parts 23 are formed on the inner sides of the left and right and bottom parts of the base part 2, and holding grooves 24 are formed on the outer side of the holding part 23 as shown in FIG. 4. The partition wall 3 is attached to the base body 2 by inserting the partition wall 3 into the holding groove 24.

  An engagement protrusion 25 is formed on the outer peripheral surface side of the holding portion 23, and when the partition wall 3 is inserted into the holding groove 24, the engagement protrusion 25 is engaged with the engagement window 31 formed in the partition wall 3. In addition, the partition wall portion 3 was prevented from inadvertently dropping off from the base body portion 2. Since the holding portion 23 is formed of a flexible resin as described above, the partition wall portion 3 can be easily detached from the base portion 2.

  On the other hand, the partition wall 3 can be folded when removed from the base 2 as shown in FIG. 5. After the cleaning operation is completed, the partition 3 is detached from the base 2 and folded as shown in FIG. Can be reduced. In the present embodiment, the partition wall 3 is folded by folding the left and right side surfaces 32 inward and folding the bottom surface 33 into a mountain shape.

  By the way, as shown in FIG. 6, the above-described seal portion 22 is bent with the tip end outside when the base portion 2 is attached to the wall surface of the bathtub BT. Therefore, it will contact | abut to the wall surface of bathtub BT by own elastic force. If it will be in such a state, even if the hot water in the bathtub BT tries to flow out into the cleaning tool 1, it is blocked by the seal portion 22 and cannot flow in. Moreover, since the height of the water surface W in the bathtub BT and the water level in the cleaning tool 1 are the same height, there is no flow from the inside of the cleaning tool 1 toward the bathtub BT, and therefore the cleaning liquid in the cleaning tool 1 The sealing part 22 prevents the composition from leaking into the bathtub B.

  In addition, in this Embodiment, in order to attach the base | substrate part 2 to the wall surface of bathtub BT, the suction cup 21 was used. The suction cup 21 is adsorbed by pressure from the outside by making the inside vacuum. Therefore, when the suction cup 21 is used in water as in the present embodiment, the water pressure acts as an adsorption force, and a stronger adsorption force can be exhibited compared to the case where it is used in the air. Therefore, even if the cleaning tool 1 is not held by hand during the cleaning operation, it is strongly fixed to the wall surface of the bathtub BT.

  Now, when the pump and bath tub are continuously operated for a predetermined time as described above and the bath tub is sufficiently cleaned, the upper opening in the cleaning tool 1 is left with the pump and bath tub operating. Inject clean water from the area. Then, the water level in the cleaning tool 1 rises above the surrounding water surface W. Therefore, the pressure in the cleaning tool 1 becomes higher than the surrounding pressure, and the hot water in the cleaning tool 1 leaks out to the bathtub BT side through between the seal portion 22 and the wall surface of the bathtub BT.

  If clean water is poured into the cleaning tool 1, the temperature of the hot water in the cleaning tool 1 is lowered, so that the bath tub continues to operate. Since the hot water in the cleaning tool 1 is replaced with clean water, clean hot water is circulated and rinsed in the bath, so that the cleaning liquid composition does not remain in the bath. This completes the washing process of the bath tub, then removes the stopper of the drain of the bathtub to drain the hot water in the bathtub BT, and finally removes the cleaning tool 1 from the wall of the bathtub BT.

  By the way, in the said embodiment, although demonstrated by the 1-hole type thing with which the water inlet and discharge port were united, even if it applies this invention to a 2-hole type thing, there is no problem. However, in the case of the two-hole type, hot water is not forcedly circulated in the bath pot by a pump, but is circulated by natural convection. Moreover, the temperature of the hot water to be sucked in is not detected, so that hot hot water stays in the upper part of the cleaning tool 1 and there is a possibility that a sufficient amount of hot water cannot be circulated in the bath.

  Therefore, as shown in FIG. 7, a replacement window 34 functioning as replacement means is provided in a part of the partition wall 3. This replacement window 34 is formed so as to straddle the water surface W up and down, and a part of high-temperature hot water sucked from the water inlet OL and discharged from the discharge port IL passes through the replacement window 34 to the bathtub BT side. leak. Then, along with the outflow of the high temperature water, the low temperature hot water in the bathtub BT flows into the cleaning tool 1 through the replacement window 34, lowers the hot water temperature in the cleaning tool 1, and the temperature in the cleaning tool 1. Reduce inequality. Then, as in the case described above, clean water is injected from above after the cleaning is completed, and the cleaning liquid composition in the bath is discharged.

  By the way, in said embodiment, in order to attach the base | substrate part 2 to the wall surface of the bathtub BT, although the four circular suction cups 21 were used, while raising the adsorption | suction power further, the floating from the bathtub BT of the base part 2 was used. In order to prevent this, as shown in FIG. 8, a long suction cup 26 may be formed integrally with the base 2 instead of being circular. The long suction cups 26 are formed so that the longitudinal direction thereof is along the frame of the base portion 2. In the present embodiment, a total of three long suction cups 26 are formed. In addition, you may form the base | substrate part 2 in the U shape open | released upwards.

  By comprising in this way, since the whole base | substrate part 2 adsorb | sucks to the bathtub BT, the floating of the base | substrate part 2 from bathtub BT is prevented. A seal portion 22 was formed between the long suction cups 26. Since the seal portion 22 is formed continuously with the long suction cup 26, when the base portion 2 is removed from the bathtub BT while adsorbed to the bathtub BT, if the seal portion 22 is lifted, the long suction cup 26 is removed. It can be easily removed from the bathtub BT.

  Moreover, although the form of folding the partition wall portion 3 was described with reference to FIG. 5, as shown in FIG. 9, the partition wall portion 3 may be folded while the partition wall portion 3 remains attached to the base body portion 2. . In the embodiment shown in FIG. 9, the volume of the partition wall portion 3 is reduced by folding the bottom surface 33 inward and folding the left and right side surfaces 32 into a mountain shape.

  In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention. For example, in the above embodiment, the base body portion 2 and the partition wall portion 3 which are the main body portions are separately formed, but the main body portion may be integrally formed.

  The bath tub cleaning set of the present invention is provided at a part of the main body and a part of the main body that can be divided into a certain volume around the inside of the tub of the bath water access hole that opens to the wall of the tub and communicates with the bath tub. A bath tub cleaning set comprising a bath tub cleaning tool having a cleaning agent inlet and the cleaning liquid composition according to claim 6. The bath tub cleaning tool and the cleaning liquid composition are as described above.

  The cleaning liquid composition of the present invention may not be used by heating it, but it is preferably heated and used, more preferably heated to 30 ° C or higher, and 40 ° C or higher. It is particularly preferable to use it by heating. This is because when the cleaning liquid composition of the present invention is heated, the decomposition rate increases, the amount of generated oxygen bubbles increases, a peeling effect is exhibited against dirt, and the oxidation action is improved.

  EXAMPLES Hereinafter, although an Example demonstrates this invention more concretely, the technical scope of this invention is not limited to these illustrations.

(Example 1) Preparation of cleaning liquid composition 14.3 g of 35% hydrogen peroxide solution, 8.8 g of urea, 0.8 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate and 75.1 g of distilled water were mixed and dissolved. Thus, a cleaning liquid composition was prepared. At this time, the molar ratio of hydrogen peroxide to urea was 1: 1, and the pH was 9.

(Example 2) Preparation of cleaning liquid composition 14.3 g of 35% hydrogen peroxide solution, 8.8 g of urea, 1.9 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate and 74.0 g of distilled water were mixed and dissolved. Thus, a cleaning liquid composition was prepared. At this time, the molar ratio of hydrogen peroxide to urea was 1: 1, and the pH was 10.5.

(Example 3) Preparation of cleaning liquid composition 14.3 g of 35% aqueous hydrogen peroxide, 8.8 g of urea, 8.3 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate and 67.6 g of distilled water were mixed and dissolved. Thus, a cleaning liquid composition was prepared. At this time, the molar ratio of hydrogen peroxide to urea was 1: 1, and the pH was 12.

(Example 4) Preparation of cleaning liquid composition 14.3 g of 35% hydrogen peroxide solution, 8.8 g of urea, 0.8 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate, 75.1 g of distilled water and surface activity A cleaning liquid composition was prepared by mixing and dissolving 0.5 g of an agent (trade name: Arscope LN90 (nonionic surfactant, main component: sodium lauryl sulfate), manufactured by Toho Chemical Industry Co., Ltd.). At this time, the molar ratio of hydrogen peroxide to urea was 1: 1, and the pH was 9.

Comparative Example 1 Preparation of Cleaning Liquid Composition A cleaning liquid composition was prepared by mixing and dissolving 35% hydrogen peroxide solution 14.3 g, 49% KOH 0.7 g and distilled water 85.0 g. The pH was 9.

Comparative Example 2 Preparation of Cleaning Liquid Composition A cleaning liquid composition was prepared by mixing and dissolving 35% hydrogen peroxide solution 14.3 g, urea 8.8 g, 49% KOH 0.7 g and distilled water 76.2 g. did. The pH was 9.

(Comparative Example 3) Preparation of cleaning liquid composition 14.3 g of 35% hydrogen peroxide solution, 0.7 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate and 84.0 g of distilled water were mixed and dissolved to prepare a cleaning liquid. A composition was prepared. The pH was 9.

Comparative Example 4 Preparation of Cleaning Liquid Composition 14.3 g of 35% hydrogen peroxide solution, 8.8 g of urea, 0.4 g of 49% KOH, 1.0 g of disodium ethylenediaminetetraacetate and 75.5 g of distilled water were mixed and dissolved. Thus, a cleaning liquid composition was prepared. The pH was 7.

(Storage stability test)
The cleaning liquid compositions prepared in Examples 1 to 4 and Comparative Examples 1 to 4 were placed in a 225 ml mayonnaise bottle, covered with a polyethylene 225 ml mayonnaise bottle, and stored in a constant temperature bath at 40 ° C. Table 1 shows the 5-stage evaluation by observing removal of the inner lid after storage at 40 ° C. for 7 days, foaming due to generation of oxygen gas and the like. The evaluation method is ◎ that there is no removal of the inner lid and there is no foaming due to generation of oxygen gas, etc., ○ that there is no removal of the inner lid and there is slight foaming due to generation of oxygen gas, and there is no removal of the inner lid, The case with relatively large foaming due to the generation of oxygen gas was marked with ●, the case with foaming due to the generation of oxygen gas, etc., and the case with foaming due to the generation of oxygen gas, and the case with severe foaming due to the generation of oxygen gas.

(Cleaning effect test)
(1) Test slide glass preparation: 5.0 g of yeast extract, 10.0 g of polypeptone and 2.0 g of glucose were dissolved in 1 liter of distilled water, and the pH was adjusted to 7.0. This liquid medium was sterilized at 121 ° C. for 15 minutes in an autoclave. In 200 ml of this sterilized solution, 2.0 g of the crushed bath residue collected from the bath tub with a homogenizer (15000 rpm x 5 minutes) is dispersed, and after collecting the entire amount in a 300 ml Erlenmeyer flask And cultured on a culture shaker at 35 ° C. for 7 days. This culture solution was applied to a slide glass and then dried at room temperature for 2 hours. The operation of applying this culture solution and drying at room temperature was repeated three more times.
(2) Evaluation method of cleaning effect: 10 g of the cleaning liquid composition prepared in Examples 1 to 4 and Comparative Examples 1 to 4 and 90 g of distilled water were collected in a 140 ml mayonnaise bottle, and after mixing well, the inner lid was put on. And immersed in a constant temperature water bath at 40 ° C. for 1 hour. In this, the test slide glass created above was immersed for 60 minutes. Next, this test slide glass was taken out and washed with water by immersing it in a 140 ml mayonnaise bottle containing 120 g of distilled water for 5 minutes. The washed glass slide was placed in an empty 140 ml mayonnaise bottle and dried at room temperature for 30 minutes. As an evaluation method, observe how much the culture of the bath-bottle adhering material applied to the slide glass is dissolved / peeled, ◎ if it is completely dissolved / peeled, ◎ if it is quite dissolved ○ The comparatively dissolved ones were evaluated as ●, the partially dissolved ones as Δ, and the ones that were the same as those immersed in distilled water but were not dissolved or peeled at all as ×. The results are shown in Table 1.

  As can be seen from the results in Table 1, Comparative Examples 1 to 3 lacking either urea or disodium ethylenediaminetetraacetate (chelating agent) or both had insufficient stability. On the other hand, Examples 1-4 and Comparative Example 4 containing both urea and ethylenediaminetetraacetic acid disodium (chelating agent) showed good stability.

  Moreover, as can be seen from the results in Table 1, Examples 1 to 4 showed a relatively good cleaning effect, whereas Comparative Examples 1 to 4 did not show a sufficient cleaning effect. From the results of Example 1 and Comparative Examples 1 to 4, when both urea and disodium ethylenediaminetetraacetate (chelating agent) are included, either of them is included or both are not included This shows that the cleaning effect is improved. Further, even when both urea and disodium ethylenediaminetetraacetate (chelating agent) were contained, in the case where the pH was neutral (Comparative Example 4), only a very low cleaning effect was obtained. When both urea and disodium ethylenediaminetetraacetate (chelating agent) were included, the cleaning effect increased as the pH increased (Examples 1 to 3). Moreover, it was shown that the cleaning effect is increased when a surfactant is contained even at the same pH (Examples 1 and 4).

  From the results of Table 1, it was found that both hydrogen peroxide, urea, and a chelating agent were alkaline and both the stability and the cleaning effect were excellent.

The figure which shows the structure of one embodiment of this invention Diagram showing the cleaning process Diagram showing the structure of a bath tub cleaning tool The figure which shows the attachment state of the partition part to a base | substrate part The figure which shows the folding state of a partition part Diagram showing the action of the seal part The figure which shows 2nd Embodiment The figure which shows 3rd Embodiment The figure which shows the folding state of the partition part in 3rd Embodiment.

Explanation of symbols

1 Bath tub cleaning tool (main body and cleaning agent inlet)
2 Base part 3 Partition part 21 Suction cup 22 Seal part 26 Long suction cup BT Bathtub W Water surface

Claims (8)

A cleaning liquid composition characterized by containing urea, hydrogen peroxide and a chelating agent and being alkaline. 2. The cleaning liquid composition according to claim 1, wherein the urea content is 0.1 to 2 moles per mole of hydrogen peroxide. The cleaning liquid composition according to claim 1 or 2, wherein hydrogen peroxide is 2 to 15% by weight based on the total amount. The cleaning liquid composition according to any one of claims 1 to 3, wherein the chelating agent is 0.1 to 2% by weight based on the total amount. The cleaning liquid composition according to claim 1, wherein the cleaning liquid composition is used by heating. The cleaning liquid composition according to claim 1, wherein the cleaning liquid composition is used for a bath. With the bath water stretched into the bathtub at least to the level where the bath water entrance / exit hole is submerged, the bath water access hole opened on the wall of the bathtub is partitioned into a certain volume around the bath water entrance / exit hole. The cleaning liquid composition according to claim 6, wherein the cleaning liquid composition is used by being put into a bath tub cleaning tool abutted against the wall surface of the bathtub. A bath tub having a main body portion that can be divided into a certain volume around the inside of the tub inside a bath water inlet / outlet hole that is communicated with the bath tub and is opened on the wall surface of the bath tub, and a detergent inlet provided in a part of the main body A bathtub cleaning set comprising a cleaning tool and the cleaning liquid composition according to claim 6.