JP4947265B2 - Environmental hygiene cleaning composition - Google Patents

Description

  The present invention relates to a detergent composition for environmental hygiene for linens such as sheets, pillow covers and towels, kitchens and kitchens such as cloths, cutting boards and tableware, and corridors, floors and utensils.

  Up to now, liquid sodium hypochlorite and granular products have been used as sanitary products for linens such as sheets, pillowcases and towels, for kitchens and kitchens such as cloths, cutting boards and tableware, and for hallways, floors and utensils. Dichloroisocyanurate and the like have been used. The certainty of the sterilizing effect on various bacteria when these chlorinated compounds are used is a well-known fact, but the storage stability is low, the corrosiveness to metals is high, and the concentration of aqueous solution is At present, it is necessary to pay attention during use, for example, because a strong irritating odor is generated when it is raised.

As the dichloroisocyanurate composition having high storage stability, 100 parts by mass of at least one chloroisocyanurate compound selected from anhydrous dichloroisocyanurate and dihydrate or potassium dichloroisocyanurate is used. A chloroisocyanurate composition characterized by blending 10 to 60 parts by mass of at least one alkali compound selected from magnesium or magnesium hydroxide has been proposed (for example, see Patent Document 1). A tablet composition for sterilization / bleach cleaning containing trichloroisocyanuric acid and / or dichloroisocyanuric acid and a hydrous aluminum sulfate as essential components has been proposed (for example, see Patent Document 2).
Japanese Patent Laid-Open No. 01-132504 (Claims) JP-A-01-242505 (Claims)

  The advantage of the performance of a solution obtained by dissolving dichloroisocyanurate in water is that it has a certain sterilizing power against various bacteria. On the other hand, since the reactivity is remarkably low, the storage stability is low, the corrosiveness to metals is intense, and it is difficult to use for sterilization under conditions where a lot of metals exist. In addition, when the concentration of the aqueous solution is increased, there is also an environmental disadvantage in use scenes such that a strong irritating odor is generated. Therefore, it is an indispensable condition for practical use that the storage stability is high, that the corrosion-inhibiting ability is ensured, and that no irritating odor is generated even when the concentration of the aqueous solution is increased.

  The present invention is excellent in storage stability, has a low corrosiveness to various metals when used in an aqueous solution, and does not generate an irritating odor even in a high-concentration aqueous solution. An object of the present invention is to provide a cleaning composition for environmental hygiene for kitchens and kitchens such as cutting boards and tableware, and for corridors, floors, and appliances.

The present invention includes at least two compounds selected from the group consisting of sodium sulfate, sodium carbonate and sodium citrate, sodium metasilicate pentahydrate obtained by subjecting only the particle surface to a low hydration treatment, dichloroisocyanurate, An environmental hygiene cleaning composition comprising:
However, with respect to 100 parts by mass of the dichloroisocyanurate, the amount of sodium metasilicate pentahydrate is 150 parts by mass or more and 600 parts by mass or less,
The blending amount of the dichloroisocyanurate in the composition is 0.5 to 30% by mass,
The pH of a 1% by weight aqueous solution of the composition is 11:00 or more and 11.96 or less,
The sodium metasilicate pentahydrate has a measured water content of -0.01 to -1.00 mass%,
The measured value of the amount of adhering water is the amount of adhering water (hydrated amount of water) calculated by the following equation (Equation 1) after drying at 800 ° C. for 2 hours using an alumina crucible:
Adhering moisture amount (%) = [1-A × (W3-W1) / (W2-W1)] × 100 (Formula 1)
The symbol of formula 1 above is determined as follows:
A: 1.7377 (coefficient) [= 212 (molecular weight _{Na 2 O · SiO 2 · 5H} 2 O) / 122 ( molecular weight Na ₂ O · SiO _2)]
W1: crucible mass (g)
W2: Total mass (g) of W1 and the sample weighed before ignition drying
W3: Total mass (g) of W1 after ignition drying and a sample precision weight,
Of the composition.

  The composition of the present invention is excellent in storage stability due to extremely little metal corrosiveness and irritating odor when used in water.

  It is known that the sterilizing power of a solution obtained by dissolving dichloroisocyanurate in water has a sufficient effect. However, with respect to the generation of irritating odors from metal corrosive and high-concentration aqueous solutions, there has been no sufficient countermeasures so far, so the range of use has been limited. According to the present invention, the conventional common sense is changed, and the bactericidal power of dichloroisocyanurate can be widely and effectively used even in the form of a high-concentration aqueous solution.

  The present invention will be described below.

For the purpose of preventing metal rust when dichloroisocyanurate is dissolved in water and preventing the generation of irritating odors from high-concentration aqueous solutions, only dichloroisocyanurate and the particle surface are low water as essential components in the composition. sodium metasilicate was divided treated pentahydrate (sodium metasilicate _{5H 2 O: Na 2 O ·} SiO 2 · 5H 2 O) and a is contained as an essential component.

  Here, the conventional sodium metasilicate pentahydrate and the sodium metasilicate pentahydrate obtained by subjecting only the particle surface to a low hydration treatment can be distinguished by the following method for measuring the amount of adhered water.

  The method for measuring the amount of adhering water is as follows. Refer to the Japanese Pharmacopoeia General Test Method and the ignition loss test method. After drying at 800 ° C. for 2 hours using an alumina crucible, the amount of adhering water is calculated by the following formula (Formula 1). Calculate (hydrate water content).

Adhering moisture amount (%) = [1-A × (W3-W1) / (W2-W1)] × 100 (Formula 1)
The symbol of the above formula 1 is determined as follows.

A: 1.7377 (coefficient) [= 212 (molecular mass Na ₂ O.SiO ₂ .5H ₂ O) / 122 (molecular mass Na ₂ O.SiO ₂ )]
W1: crucible mass (g)
W2: Total mass (g) of W1 and the sample weighed before ignition drying
W3: Total mass (g) of W1 after ignitable drying and the exact sample weight
The measured value of the attached water content of sodium metasilicate pentahydrate in which only the particle surface used in the present invention according to the above-described formula 1 is subjected to a low hydration treatment is −0.01 to −1.00% by mass.

  This -0.01--1.00 mass% respond | corresponds to the moisture content ratio from which the water as a hydrate separated from the particle | grain surface of the sodium metasilicate pentahydrate from the particle | grain surface by the low hydration process.

  As a method for subjecting only the particle surface of sodium metasilicate pentahydrate to a low hydration treatment, a drying method using an aeration flow hot air drying method such as fluidized bed drying or airflow drying is employed.

  A preferred embodiment of the present invention will be described.

  Examples of the dichloroisocyanuric acid salt used in the present invention include sodium salt and potassium salt of dichloroisocyanuric acid, with sodium dichloroisocyanurate being preferred.

  Sodium metasilicate pentahydrate in which only the particle surface is subjected to low hydration treatment with respect to 100 parts by mass of dichloroisocyanurate in order to ensure the metal corrosion inhibitory effect and prevent the generation of irritating odors from highly concentrated aqueous solutions. The blending amount of the Japanese product is 150 parts by mass or more, and the pH of the 1% by mass aqueous solution of the composition is 11 or more. Moreover, as an upper limit of the compounding quantity of sodium metasilicate pentahydrate, it is 2000 mass parts with respect to 100 mass parts of dichloro isocyanurate.

  By making the pH of the 1% by mass aqueous solution of the composition 11 or more, the metal corrosion inhibiting effect is ensured and the generation of irritating odors from the high concentration aqueous solution is prevented.

  In order to improve the storage stability of the composition, the blending amount of dichloroisocyanurate in the composition is 0.5 to 40% by mass or 3 to 40% by mass.

  By adding 150 parts by mass or more of sodium metasilicate pentahydrate with a low hydration treatment only on the particle surface to 100 parts by mass of dichloroisocyanurate, iron, stainless steel, copper, brass, It is considered that specific adsorption of silicate anions occurs on a metal surface such as aluminum, and the produced adsorbed film serves as a protective film on the metal surface, thereby preventing attack of metal corrosion factors. This concerns the electric double layer potential at the metal / solution interface. In addition, the alkali content in sodium metasilicate pentahydrate, which is a hypohydrated treatment only on the particle surface, ionizes hypochlorous acid, which is an active ingredient of dichloroisocyanurate, in an aqueous solution. We think that we are suppressing. In addition, a composition containing dichloroisocyanurate and sodium metasilicate pentahydrate has a poor storage stability, so when stored at a relatively high temperature, it rapidly caking (consolidates). However, it is possible to suppress this by using sodium metasilicate pentahydrate with a low hydration treatment only on the particle surface and setting the dichloroisocyanurate content to 3 to 40% by mass. it can. Sodium metasilicate pentahydrate obtained by subjecting only the particle surface to a low hydration treatment can be easily obtained as a commercial product.

  EXAMPLES Hereinafter, although an Example and a comparative example are given and this invention is demonstrated in detail, the technical scope of this invention is not restrict | limited by this.

  Here, the trade name “Sodium Silicate Pentahydrate” (manufactured by Sanpo Chemical Industry Co., Ltd.) was used as sodium metasilicate pentahydrate (untreated product). On the other hand, the product name “Metaace 5 (high fluidity pentahydrate)” (manufactured by Sanpo Chemical Industry Co., Ltd.) is used as sodium metasilicate pentahydrate (dried product) that has been subjected to low hydration treatment only on the particle surface. used. In the method for measuring the amount of adhering moisture, the amount of adhering moisture of the used “sodium metasilicate pentahydrate” (manufactured by Sanpo Chemical Industry Co., Ltd.) was 1.09% by mass. Moreover, the amount of adhering water of “Metaace 5 (high fluidity pentahydrate)” (manufactured by Sanpo Chemical Industry Co., Ltd.) used was −0.51% by mass.

  In Examples 1-7 and Comparative Examples 1-2, the composition of the mixing | blending shown in Table 1 was created, and the following evaluation was performed.

[Metal corrosion test]
Each of the compositions of Examples 1 to 7 and Comparative Examples 1 to 3 shown in Table 1 was dissolved in distilled water so that the effective chlorine concentration was 1000 ppm. Is immersed and stored at 40 ° C. for 24 hours. The degree of corrosion after storage was measured and the rating of the degree of corrosion was determined. The results are shown in Table 1.

Corrosion degree: Reduced mass of test piece due to corrosion (mdd: mg / dm ² · d)
Corrosion degree was classified according to the following criteria (rating).

  A (excellent): 0 to 10, B (possible) 10 to 50, C (no)> 100.

[PH measurement of 1% aqueous solution]
The compositions of Examples 1 to 7 and Comparative Examples 1 and 2 shown in Table 1 were each dissolved in distilled water to prepare a 1% aqueous solution, and then the pH was measured. For Comparative Example 3, a solution diluted with distilled water was prepared so that the effective chlorine concentration was 1000 ppm, and the pH was measured. The results are shown in Table 1.

[Irritating odor confirmation test]
The compositions of Examples 1 to 7 and Comparative Examples 1 to 3 shown in Table 1 were dissolved in distilled water so that the effective chlorine concentration was 1000 ppm, and this solution was placed in a plastic container and sealed in a temperature state. The amount of irritating odor generated after storage at 40 ° C. for 2 hours, 4 hours and 6 hours was measured with a chlorine gas detector tube. The results are shown in Table 1.

In Reference Examples 8 to 9 and Comparative Examples 3 to 4, compositions having the formulations shown in Table 2 were prepared and evaluated as follows.

[Stability test]
100 g of each of the compositions of Reference Examples 8-9 and the compositions of Comparative Examples 3-4 shown in Table 2 were filled in aluminum bags (15 cm × 10 cm), heat sealed, and hermetically stored at 55 ° C., respectively. The presence or absence of caking was confirmed after storage for 24 hours and 48 hours. The results are shown in Table 2.

  In Example 10 and Comparative Example 5, compositions having the composition shown in Table 3 were prepared and evaluated as follows.

[Evaluation of sterilizing power for biofilm]
In a stock solution in which the composition of Example 10 and the composition of Comparative Example 5 shown in Table 3 were dissolved in milli-Q water (water in which ion-exchanged water was passed through a pure water production apparatus), 0.5 mM phosphate buffer ( The test solution was prepared by adjusting the effective chlorine concentration to 5 ppm by adding pH 7.4) and diluting.

  Prepare a simple biofilm sample that matches the actual environment in advance on a glass piece, soak the glass piece in each test solution for 5 minutes, and then add a neutralizer (sodium thiosulfate) to stop the reaction. The sterilization power was evaluated by measuring the number of bacteria forming the biofilm (the number of viable bacteria) after pulverizing the residue in the test solution by ultrasonic treatment. The results are shown in Table 3.

(Biofilm sample preparation method)
After placing a glass piece (slide glass cut into 14 mm × 26 mm) in a petri dish with a diameter of 14.5 cm and sterilizing, add 100 ml of culture broth (EPSbroth) and environmental resident bacteria (Pseudomonas fluorescens JCM No. 2779), A biofilm is formed on a piece of glass while gently stirring the culture with a stirrer at 27 ± 1 ° C. for 5 days. In addition, the glass piece in which the biofilm was formed passes through 0.5 mM phosphate buffer (pH 7.4) twice beforehand, and uses it for a test, after removing floating bacteria.

(Composition of culture solution)
EPS broth (Le Chevallier, 1988)
Composition (per liter):
_{K 2 HPO 4 7.0g, KH 2} PO 4 3.0g, MgSO 4 H 2 O 0.1g, (NH 4) SO 4 0.1g, CaCl 2 0.01g, FeSO 4 0.01g, NaCl 0. 1 g, Glucose 10.0 g, (pH 7.0).

  Separate and sterilize phosphates and other reagents and mix them before use.

(Measurement method of viable count)
The glass piece and the test solution are subjected to ultrasonic wave for 90 seconds, diluted with physiological saline, cultured on a standard agar medium for 48 hours, and then the number of formed colonies (CFU colony forming unit) is counted.

(Composition of normal agar medium)
Composition (per liter):
Yeast extracts 2.5 g, Peptone 5.0 g, Glucose 1.0 g, Agar 15.0 g, (pH 7.4).

[Detergency evaluation]
A test solution was prepared by dissolving the compositions of Example 10 and Comparative Example 6 shown in Table 3 in distilled water so that the effective chlorine concentration was 200 ppm, and a 5 cm square tea-stained cloth (EMPA165) was cleaned. Detergency evaluation was performed as a body sample. The contaminated cloth was immersed in a beaker containing 200 ml of each test solution, allowed to stand at 20 ° C. for 3 hours, rinsed lightly in a beaker containing distilled water, and dried at room temperature. The cleaning effect was evaluated according to the following criteria, and the whiteness of the contaminated cloth was measured with a color difference meter (Color Analyzer TC-1800MKII, manufactured by Tokyo Electric Decoration). The results are shown in Table 3.

Judgment criteria:
○… Washed well △… Washed about half ×… Slightly washed

  As shown in Tables 1 to 3, the composition of the present invention is excellent in sterilization and detergency, has very little metal corrosiveness and generation of irritating odor when used in water, and has excellent storage stability. ing.

Conventionally, it has been known that the sterilizing power of a solution obtained by dissolving dichloroisocyanurate in water has a sufficient effect. However, with respect to the generation of irritating odors from metal corrosive and high-concentration aqueous solutions, there has been no sufficient countermeasures so far, so the range that can be used has been limited. According to the present invention, sheets, pillow covers, towels that are excellent in sterilization, detergency and storage stability, have low corrosiveness to various metals when used in aqueous solutions, and do not generate irritating odors even in high concentration aqueous solutions. It is now possible to provide environmental hygiene cleaning compositions for linens, cloths, cutting boards, dishes and other kitchens and kitchens, and corridors, floors, and utensils. As a result, the sterilizing power of aqueous solutions of dichloroisocyanurate, whose range of use was limited to specific applications, can be used widely and effectively even under conditions where there are many metals and in the form of highly concentrated aqueous solutions. Therefore, it was expected that the application of the aqueous solution could be expanded.

Claims (1)

An environment comprising at least two compounds selected from the group consisting of sodium sulfate, sodium carbonate and sodium citrate, sodium metasilicate pentahydrate obtained by subjecting only the particle surface to a low hydration treatment, and dichloroisocyanurate Sanitary detergent composition,
However, with respect to 100 parts by mass of the dichloroisocyanurate, the amount of sodium metasilicate pentahydrate is 150 parts by mass or more and 600 parts by mass or less,
The blending amount of the dichloroisocyanurate in the composition is 0.5 to 30% by mass,
PH of 1 mass% aqueous solution of this composition is 11.00 or more and 11.96 or less,
The sodium metasilicate pentahydrate has a measured water content of -0.01 to -1.00 mass%,
The measured value of the amount of adhering water is the amount of adhering water (hydrate) calculated by the following equation (Equation 1) after the sodium metasilicate pentahydrate is dried at 800 ° C. for 2 hours using an alumina crucible. Moisture content):
  Adhering moisture amount (%) = [1-A × (W3-W1) / (W2-W1)] × 100 (Formula 1)
  The symbol of formula 1 above is determined as follows:
A: 1.7377 (coefficient) [= 212 (molecular mass Na ₂ O ・ SiO ₂ ・ 5H ₂ O) / 122 (molecular mass Na ₂ O ・ SiO ₂ ]]
W1: crucible mass (g)
W2: Total mass (g) of W1 and the sample weighed before ignition drying
W3: The total mass (g) of W1 after ignitable drying and the sample weight.