JPH1161193A - Cleansing composition for bath boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a cleaning composition for a bath boiler, capable of readily removing stain attached to a bath boiler and containing a quick soluble sodium percarbonate and dicyandiamide in a specific ratio, by adjusting the composition to a fixed alkali pH range. SOLUTION: This composition comprises (A) 0.1-99.8 wt.% of quick soluble sodium percarbonate which is obtained by charging a beaker of 1 liter with 1 liter of water at 20±0.5 deg.C and adding 5 g of sodium percarbonate once to the beaker under conditions of stirring by using an octagon rotor (10 mm diameter and 40 mm length) at 2 rotations per second and has <160 seconds required to give a transparent solution by visual observation and (B) 0.2-30 wt.% of dicyandiamide as main components and is adjusted to pH8-13 in 10 % aqueous solution. Preferably 100 pts.wt. of the composition is mixed with 0.05-5 pts.wt. of an enzyme such as protease and/or 0.1-30 pts.wt. of a surfactant such as a polyoxyethylene alkyl ether.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning composition for a basin bath which easily removes dirt attached to the bath bath even at a relatively low temperature range.

[0002]

2. Description of the Related Art Secretions, soap scum, dust, etc. from the human body adhere to the inside of a household bath kettle, and bacteria and fungi using these organic substances as nutrient sources grow under high temperature and high humidity. In a state to cause it to occur. These are not only unsanitary but also cause inconvenience such as deterioration of the heat transfer rate of the kettle. Conventionally, inorganic peroxides that release hydrogen peroxide when dissolved in water, for example, sodium percarbonate or sodium perborate, have been widely used as bath cleaners for removing these stains. . Hydrogen peroxide released when these detergents are dissolved in water oxidizes and decomposes scale attached to the inside of the kettle, and makes the scale easily peelable from the kettle. Further, the hydrogen peroxide itself is gradually decomposed to generate oxygen gas, and the scale is separated and removed by the diffusion effect of the fine bubbles, thereby improving the cleaning effect. Generally, when using a bath cleaner containing an inorganic peroxide as a main component, the working time required for cleaning the bath is about 10 to 20 minutes. In order to complete the cleaning within this time, heat treatment, that is, reheating must be performed. However, heating for a long time involves danger, and depending on the type of bath kettle, reheating is automatically stopped when the set temperature is reached, and cleaning is completed in a short time. In addition, it is effective to use when the temperature of the hot water is high after the bath has risen.However, due to various circumstances, there is a situation in which the temperature must be reduced the next day and the water must be used the next day. Working is not preferred in terms of use and economy. As described above, there has been a strong demand for the development of a cleaning agent for a bath kettle that can effectively wash the bath kettle irrespective of the water temperature of the bath kettle after use.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cleaning composition for a bathtub that can easily remove dirt attached to the bathtub even in a relatively low temperature range.

[0004]

Means for Solving the Problems As a result of intensive studies on the composition of sodium percarbonate and dicyandiamide as a bath kettle detergent, it was found that sodium percarbonate required a sufficient washing effect inside the bath kettle even at a low temperature range. In particular, this problem has been accomplished by using a material having good solubility even in a low temperature range. That is, the present invention provides (A) 0.1% to 99.8% by weight of rapidly soluble sodium percarbonate,
(B) a composition containing 0.2% to 30% by weight of dicyandiamide as a main component, and 10% of the composition;
% Aqueous solution is adjusted to pH 8-13, and relates to a cleaning composition for bathtubs.

[0005]

DETAILED DESCRIPTION OF THE INVENTION The present invention is achieved by a composition containing fast-dissolving sodium percarbonate and dicyandiamide as main components. As the fast-dissolving sodium percarbonate usable in the present invention, 20 ° C (±
(0.5 ° C.) and 5 g of sodium percarbonate at a time under a condition of stirring at a rate of 2 times / second using an octagon rotor (diameter 10 mm, length 40 mm). 160 hours
Fast dissolving sodium percarbonate that is less than a second is used. The above test method is abbreviated as a solubility test of sodium percarbonate, and when the time until the solution becomes 120 seconds is indicated as 120, the solubility of sodium percarbonate. The fast-dissolving sodium percarbonate is obtained by coating sodium percarbonate having a particle size of 200 to 2000 microns with a coating agent disclosed in JP-A-9-86908, for example, iminodiacetic acid, magnesium sulfate, sodium sulfate, and water glass. preferable. Commercial products include Mitsubishi Gas Chemical Co., Ltd.
SPC-Q is preferably used.

[0006] Dicyandiamide can be used in any form which can be usually purchased as an industrial product.

The rapidly soluble sodium percarbonate and dicyandiamide may further contain a solvent, a bactericide, a fragrance,
A coloring agent and a sequestering agent are appropriately added to obtain a composition. In 100% by weight of this composition, (A) 0.1 to 99.8% by weight of fast-dissolving sodium percarbonate is used, preferably 10 to 90% by weight, and more preferably 40 to 90% by weight. As (B) dicyandiamide, a commercially available solid or aqueous solution can be used. The content of the component is 0.2 to 30% by weight, preferably 1 to 30% by weight, and more preferably 10 to 30% by weight in terms of solids. The composition containing (A) fast-dissolving sodium percarbonate and (B) dicyandiamide as the main components is adjusted using an alkali agent so that the pH of the 10% aqueous solution is in the range of 8 to 13. . Examples of the alkali agent include an alkali metal hydroxide, an alkaline earth metal hydroxide, and an alkali metal silicate. Among them, the use of an alkali metal salt such as sodium silicate and potassium silicate is preferable because the detergency is significantly improved.

[0008] Adjusting the pH of the detergent composition is an essential condition for obtaining high bleaching detergency. The pH of a 10% aqueous solution of the detergent composition is usually from 8 to 13, preferably from 9 to 11.5. If the pH is lower than this range, the bleaching detergency is low, and if the pH is higher than this range, it becomes difficult to handle as a bathtub cleaning composition such as instability of sodium percarbonate.

[0009] In order to further improve the bleaching detergency of the bath cleaner composition of the present invention, an enzyme and / or a surfactant can be used if necessary. The enzyme can further improve the bleaching detergency of the cleaning of the present invention by effectively decomposing organic dirt attached to the bath kettle. Examples of enzymes that can be used include proteases and other proteolytic enzymes and lipases and the like.
The amount of the enzyme to be added is preferably 0.05 to 5 parts by weight based on 100 parts by weight of the bath cleaning composition.

[0010] Further, the surfactant aids the penetration of the detergent composition into the deposits, prevents re-contamination of the interior of the bath, and enhances the bleaching / washing / removal effect of the deposits. it can. As a surfactant, polyoxyethylene alkyl ether, polyoxyethylene fatty acid ester,
Examples thereof include nonionic surfactants such as amine oxides, soaps, anionic surfactants of alkyl sulfates and alkyl benzene sulfonates. The surfactant is added in an amount of 0.1 to 30 parts by weight, preferably 0.5 to 10 parts by weight, based on 100% by weight of the bath cleaner composition.

The bath kettle cleaning composition of the present invention is suitably used for a natural circulation bath kettle and a forced circulation bath kettle. The bath cleaner according to the present invention is used in the form of an aqueous solution, slurry, or powder. In the case of a natural circulation bath kettle, it was injected into a bath kettle filled with water by an injection container, and in the case of a forced circulation bath kettle, the detergent composition was charged into a bath tub filled with water. Thereafter, reheating and the like are performed, and the cleaning liquid is evenly dispersed in the pot by circulating the cleaning liquid in the bathtub, thereby effectively cleaning dirt. By the above washing method, a significant decrease in the number of bacteria after washing is observed.

[0012]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Example 1 A composition comprising 80.0% by weight of fast-dissolving sodium percarbonate (SPC-Q manufactured by Mitsubishi Gas Chemical Co., Ltd.) having a solubility of 120 of sodium percarbonate and 20.0% by weight of dicyandiamide was slightly added. Caustic soda was added to obtain a powdery bath cleaner composition 1. The amount of caustic soda added is 1% of the composition.
The pH of the 0% aqueous solution was adjusted to 10.5.

Example 2 The same procedure as in Example 1 was repeated except that 0.5 parts by weight of an enzyme (protease) was added to 100 parts by weight of rapidly soluble sodium percarbonate and dicyandiamide. The pH of the 10% aqueous solution was adjusted to 10.5, and a powdery bath cleaner composition 2 was obtained in the same manner as in Example 1.

Example 3 The same procedure as in Example 2 was repeated except that 0.5 parts by weight of the enzyme (protease) was replaced by 5 parts by weight of a surfactant. pH 1
It adjusted so that it might be set to 0.5, and obtained the powdery detergent composition 3 for bathtubs.

COMPARATIVE EXAMPLE 1 Slight caustic soda was added to a composition comprising 80.0% by weight of sodium percarbonate (SPC-G manufactured by Mitsubishi Gas Chemical Co., Ltd.) having a solubility of 240 sodium percarbonate and 20.0% by weight of dicyandiamide. The mixture was added to obtain a powdery cleaning composition 4 for a bathtub in the same manner as in Example 1. The amount of sodium hydroxide added was adjusted so that the pH of a 10% aqueous solution of the composition was 10.5. The above cleaning compositions 1 to 4 were evaluated by the following test methods.

1) Evaluation Test Using a Natural Circulation Bath Kettle A household bath kettle (natural circulation bath kettle) installed in a 200 L bathtub that is used by a family of four and has not been cleaned for more than three months. 25 ° C until the upper hole of the pot is hidden
, And inject it into the lower hole of the kettle using an injection container containing 140 g of each bath kettle and leave it for 10 minutes. During this time, the amount of dirt coming out of the hole of the kettle is visually evaluated. 2) Evaluation test with forced circulation bath kettle For home bath kettle (forced circulation bath kettle) installed in a 200L bathtub used by a family of four and not cleaned for more than 5 years , Water was placed above the circulation hole of the kettle, and 250 g of each bath kettle was poured into the bath.
Cook for 0 minutes. During this time, the amount of dirt coming out of the circulation hole of the kettle is visually evaluated. 1) According to the test method of 2), the amount of dirt coming out of the circulation hole of the pot was confirmed by the following evaluation method.

3) Evaluation method The appearance of dirt was visually judged in the following four stages. 4) Method for confirming the bactericidal effect A viable cell count test (agar plate pour method) was performed to confirm the bactericidal effect in the bath kettle. The test method was as follows: each 1 ml of the remaining hot water in the bathtub before and after using the product of the present invention was mixed with 15 g of tryptosome agar medium.
After the medium was solidified by adding ml, the cells were cultured at 37 ° C. for 48 hours, and the number of bacteria per one Petri dish (65 square cm) was counted. The results are shown in Table 1.

[0019]

[Table 1]

[0020]

According to the present invention, both the natural circulation type bath kettle and the forced circulation type bath kettle can effectively remove the dirt inside the bath kettle and significantly reduce the number of bacteria after washing as compared with the comparative example. Was done. As described above, the cleaning composition for a bathtub according to the present invention can easily remove dirt attached to the bathtub even in a relatively low temperature range.

──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. ⁶ Identification code FI (C11D 3/60 3:39 3:32)

Claims (3)

[Claims] (A) Fast-dissolving sodium percarbonate 0.1%
９９99.8% by weight, (B) dicyandiamide 0.2%
A composition containing about 30% by weight as a main component,
And a pH of a 10% aqueous solution of the composition is adjusted to 8 to 13. 2. The temperature of 20 ° C. (± 0.5) in a 1 liter beaker.
C)), 5 g of sodium percarbonate is added at a time under the condition of stirring using an octagon rotor (diameter 10 mm, length 40 mm) at a rate of 2 revolutions / sec. The cleaning composition for a bathtub according to claim 1, wherein a fast-dissolving sodium percarbonate having a visual time of less than 160 seconds is used. 3. 100 parts by weight of a composition containing fast-dissolving sodium percarbonate and dicyandiamide as main components, and 0.05 to 5 parts by weight of an enzyme and / or 0.1 to 3 parts by weight of a surfactant.
The cleaning composition for a bathtub according to claim 1, comprising 0 parts by weight.