JPH03223386A - Method for stainproofing and deodorizing toilet bowl - Google Patents

Abstract

PURPOSE:To prevent the formation of black stains on a toilet bowl surface and the deposition of scale in a toilet bowl trap and to deodorize generated ammonia by allowing a solution of a molded material containing a specified solid acid and a subliming substance to flow down along the surface of a toilet bowl and into a trap thereof. CONSTITUTION:A molding material consisting of at least one solid acid selected from among adipic, succinic, fumaric, and orthophthalic acids and a molding base material containing a subliming substance is dissolved in a dissolving unit provided midway on a pipeline for toilet flushing water, and the solution is allowed to flow down along the surface of a toilet bowl and into a trap thereof. The amount of the solid acid in the molding material will vary depending upon the weight of the molding material, the size of the dissolving unit, and frequency of use of a toilet bowl, ranging from 30 to 70wt.%. The base material is employed for the purpose of dissolving the solid acid at an appropriate speed without causing disintegration on use and improving the moldability of the solid acid. As the subliming substance in the base material, p-dichlorobenzene is preferably used.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a method for preventing and deodorizing toilet bowl surfaces and toilet traps, and more specifically, to prevent contamination caused by metal compounds on toilet bowl surfaces and to prevent scale generation on toilet bowl traps. Concerning the prevention and deodorization of bad odors generated from toilet bowls.

The toilet bowl antifouling and deodorizing method of the present invention can be used for various types of flush toilet bowls.

[Conventional technology]

Heavy metals such as iron and manganese contained in small amounts in the flushing water gradually adhere to the surface of the toilet bowl and become contaminated black, causing discomfort to the user.

In addition, in toilet traps, especially urinal traps, scale called urinary stone, which is a mixture of calcium-based compounds and organic substances generated by the decomposition of urine, is formed, which impairs the flow of urine and flushing water, and in severe cases. The drain pipe is blocked and the toilet becomes unusable.

In addition, urine collected on the toilet surface and in the toilet trap is
Ammonia is produced by the decomposition of urine.

Conventional methods of antifouling and deodorizing toilet bowls include dissolving chemicals in a dissolver installed in the flushing water pipe and cleaning the toilet bowl surface with the dissolved solution, and dissolving chemicals in low-tank hand washing water and cleaning the toilet bowl surface with the dissolved water. Cleaning methods have been put into practical use.

Various drugs containing surfactants, bactericides, and fragrances have been proposed for use in these methods.

For example, Japanese Patent Publication No. 45-30706 describes a deodorizing cleaning agent for flushing toilets made by melt-mixing surfactants, ion sequestrants, fragrances, etc. with polyethylene glycol or polypropylene glycol and injection molding. A cleaning and antifouling fragrance made by cooling and molding a mixed melt consisting of polyethylene glycol, a water-soluble aromatic substance, a nonionic surfactant, and additives such as perfume was disclosed in Japanese Patent Laid-open No. 5
It is described in No. 7-168668.

British Patent No. 1069213 describes a method of dissolving disinfectants and detergents in a dissolver installed in the flushing water pipe. Japanese Patent Laid-Open No. 62-382 discloses a method for installing the washing water flow path, under the faucet of a low tank with a hand wash part, in the toilet trap part, in the washing water storage tank part, in the drain pipe, and in the washing water piping.
It is described in No. 99.

Furthermore, there is a method to physically remove the black stain that has contaminated the toilet bowl surface using an abrasive, and a method to remove scale that has adhered to the toilet trap using a strong inorganic acid such as hydrochloric acid. A dissolving method is used.

[Problem that the invention seeks to solve]

The use of conventional detergents and deodorizers consisting of surfactants and fragrances is effective in preventing stains caused by organic substances on the toilet bowl surface and in masking bad odors, but it is effective in preventing black stains caused by heavy metals such as iron and manganese. Prevention and toilet traps are even less effective at preventing scale.

The use of agents consisting of surfactants, fungicides and fragrances
It is effective in preventing organic matter stains on the toilet bowl surface and masking bad odors. However, it is not effective at all in preventing black stains due to the adhesion of heavy metals such as iron and manganese, which are the most problematic contamination of toilet bowl surfaces, and furthermore, the effect of preventing scale in toilet traps is not sufficient. In addition, the flow of disinfectants into the septic tank interferes with the action of microorganisms in the septic tank, reducing the purification ability of the septic tank.

The method of adding an ion sequestering agent to urine or flush water is quite effective in preventing black stains caused by heavy metals such as iron and manganese on the toilet surface and in preventing scale in the toilet trap. However, in order to completely prevent black staining on the toilet bowl surface and scale adhesion in the toilet bowl trap, it is necessary to use an ion sequestering agent at a concentration of 0.3 to 1% by weight based on urine, and it has no effect on removing bad odors. . Generally, ion sequestering agents are expensive and this method is difficult to widely popularize.

Apply an anti-scaling agent containing a solid acid as the main ingredient to the toilet drain pipe inlet, the wash water channel on the inner wall and bottom of the toilet, under the faucet of the low tank with hand basin, the toilet trap, the wash water storage tank,
The method of installing in drain pipes and flush water pipes is quite effective in preventing fouling of toilet bowl surfaces, preventing scale from traps, and deodorizing ammonia. However, in this method, the drug eluted after one use is diluted with the entire amount of washing water, so a large amount of drug is required to always maintain the drug concentration in the washing water above the effective concentration.

In addition, in a toilet antifouling/deodorizing method in which a molded mixture of a solid acid as the main component and a base containing paradichlorobenzene is used in a dissolving vessel installed in the middle of the wash water pipe, the solid acid is
When using acids with relatively high solubility such as sulfamic acid, sodium bisulfate, tartaric acid, citric acid, or boric acid, when the molded product is new, the dissolved acid concentration in the dissolver is high, making it difficult to prevent stains and deodorize. Although the effect is good, the acid elution in the dissolver is faster than the sublimation rate of the base component paradichlorobenzene, so the upper part of the molded body placed in the dissolver, where sublimation is easier, is faster than the lower part. As the molded product is consumed, the shape of the molded product changes to a lumpy shape with a small surface area, so the acid elution concentration decreases significantly as the molded product is consumed, which has the disadvantage that the antifouling and deodorizing effects of the toilet bowl vary.

Also, removing black stains from the toilet bowl surface with abrasives is an unpleasant and difficult task, and can damage the toilet bowl surface. In addition, when removing scale using strong acids, there are problems such as corrosion of drain pipes due to the acid and reduction in purification ability due to acid flowing into the septic tank.

An object of the present invention is to provide a method suitable for preventing black stains on the surface of a toilet bowl, preventing scaling from sticking to a toilet trap, and deodorizing ammonia generated from a toilet bowl.

[Means for solving problems]

As a result of intensive research to achieve the above-mentioned objective, the present inventors have discovered that black stains on the toilet bowl surface are caused by heavy metals such as iron and manganese contained in extremely small amounts in the flushing water when it dries on the toilet bowl surface. These heavy metals are produced by oxidizing and becoming insoluble oxides that stick to the surface of the toilet bowl.These heavy metals do not produce insoluble compounds in acidic conditions of pH 7 or lower.In addition, the scale in toilet traps is composed of calcium apatite [Ca, A mixture of (PO,)OHI 40-60% by weight, calcium carbonate [CaCO3] 20-40% by weight, and water-insoluble organic matter 10-30% by weight,
Calcium-based scale does not precipitate in water with a pH of 7.5 or lower, and fixed scale dissolves in water with a pH of 7 or lower. Furthermore, urine or mixed waste water with urine and flushing water is treated with urine degrading enzymes in the toilet trap. The present invention was completed based on the discovery that ammonia is produced by the action of bacteria and bacteria, and the pH rises in a short period of time.

In the present invention, a molded body made of at least one solid acid selected from the group consisting of adipic acid, succinic acid, fumaric acid, and orthophthalic acid and a molding base containing a sublimable substance is placed in the middle of toilet flush water piping. Melt in a melter installed at
A toilet bowl antifouling/deodorizing method characterized by flowing dissolved water into the toilet bowl surface and toilet trap In the present invention, a solid acid is mixed with a molding base and a molded product is installed in the middle of a toilet flush water pipe. When used in a dissolving vessel, the dissolution rate of the solid acid is almost the same as the sublimation rate of the sublimable substance contained in the molding base, so only specific components of the molded product components may be consumed preferentially. The molded product is consumed without losing its shape until the end. Further, since the dissolution of the solid acid and the sublimation of the sublimable substance are balanced, the molded body is uniformly consumed on all surfaces of the molded body, and there is little change in shape and surface area due to consumption. Therefore, there is little change in the dissolved concentration of the solid acid as the molded product is consumed, and there is little variation in the antifouling, scale prevention, and deodorizing effects from the time the molded product is used until it is used up.

These solid acids can be used singly or as a mixture of two or more.

The amount of solid acid blended in the molded body varies depending on the weight of the molded body, the size of the dissolver, the frequency of use of the toilet bowl, etc.
It can be blended in an amount of 70% by weight, preferably 40 to 65% by weight.

When using the base, the solid acid must be dissolved at an appropriate rate and without losing its shape, and when molded into a molded article,
It is used to improve the shaping of solid acids. As a base, a sublimable substance can be used alone, or it can be melt-molded or pressure-molded together with a sublimable substance, and the molded product can be dissolved without disintegrating when it comes into contact with water. Mixed systems with molecules and/or surfactants are used. Paradichlorobenzene is used as the sublimable substance in the base. The water-soluble polymer in the base is a water-soluble polymer that is solid at room temperature, such as polyethylene glycol or polypropylene glycol, and the surfactant is a variety of nonionic, cationic, and anionic surfactants. Examples include agents. Water-soluble polymer and/or
Alternatively, when a surfactant is added, each may be used alone or one or two or more of them may be used in combination.

In the molded article, the content of paradichlorobenzene as a base is 40% by weight or more in the base, and is 15 to 70% by weight, preferably 20 to 50% by weight in the molded article.
It is. In addition, when using a mixture of paradichlorobenzene and a water-soluble polymer and/or a surfactant as a base,
The total amount of the mixture of water-soluble polymer and/or surfactant is 60% by weight or less in the base, 30% by weight in the molded article
It is as follows. Moreover, the base content in the molded body is 30 to 7
0% by weight, preferably 40-60% by weight. If the base content in the molded product is less than 30% by weight, the molded product may collapse, making it difficult to prepare and dissolve the solid acid. On the other hand, if the base content in the molded article exceeds 70% by weight, the content of the solid acid, which is an active ingredient, will decrease, and the antifouling and deodorizing effects will not be sufficient.

If the paradichlorobenzene content of the molded product is less than 15% by weight, the molded product will easily lose its shape when it comes into contact with dissolution water, making it difficult to control the dissolution rate.On the other hand, if the content of paradichlorobenzene The amount exceeds 70% by weight'
If this occurs, the content of the solid acid, which is an active ingredient, will decrease, and the antifouling and deodorizing effects will not be sufficient. Furthermore, when using a mixture of paradichlorobenzene and a water-soluble polymer and/or a surfactant as a base, if the content of paradichlorobenzene in the base is less than 40% by weight, formation of a continuum of paradichlorobenzene may occur. This becomes difficult, and the molded product tends to swell and lose its shape.

The toilet bowl antifouling and deodorizing agent of the present invention is a molded article having an arbitrary shape that can be stored in a dissolving vessel, such as a spherical, cylindrical, disc, cubic, rectangular parallelepiped shape, etc. It is a molded body of a mixture consisting of a chemical agent and additives added as desired. Additives that may be added as desired include dissolution rate regulators, fragrances, colorants, corrosion inhibitors, bactericides, ion sequestering agents, and the like.

A dissolution rate adjusting agent can be added to the molded product for the purpose of adjusting the dissolution rate of the molded product in water.

Examples of the dissolution rate adjusting agent include poorly water-soluble substances, such as fatty acid salts and higher alcohols, which can be obtained by heating the mixture with the base or solid acid, such as fatty acid salts, higher alcohols, etc., or powders of water-repellent substances, such as , calcium stearate, magnesium stearate, talc, etc. can be used.

Corrosion inhibitors are added for the purpose of preventing corrosion of toilet drain pipes. As corrosion inhibitors, acid corrosion inhibitors such as alkylthioureas are preferably used.

Various prepared fragrances can be added to the molded body for the purpose of masking bad odors and giving off a fragrance, and colorants can be added to the molded body for the purpose of detecting the amount of the molded body remaining, coloring washing water, etc.

It is also possible to add a type of bactericidal agent that does not affect the septic tank or an amount that has a negligible effect, and an ion sequestering agent that does not cause an economic burden.

The toilet bowl antifouling/deodorizing agent of the present invention can be produced by known molding methods such as mixing each component and compressing it into a tablet, or heating a mixture of each component, injecting a melted slurry into a mold, cooling, and solidifying it. It can be manufactured by

The molded article of the present invention is used by being placed in a dissolver installed in the middle of the toilet flush water pipe. A dissolver that can be used to dissolve the molded article of the present invention is used by being installed in the middle of a water pipe for flushing a flush toilet. In other words, in the case of a high tank type, the piping between the high tank and the toilet bowl, in the case of a button type, the piping between the button and the toilet bowl, or in the case of a low tank type, between the low tank and the toilet bowl. Used by installing it in piping. The structure of the dissolver has a float valve and a check valve, and the piping is installed in a portion to introduce a part of the beginning of the flow of cleaning water from the cleaning water piping into the dissolver, the introduction piping, and the dissolver. This prevents the washing water from flowing beyond a specified amount into the pipe, prevents the dissolved water from flowing out from the dissolver when the washing water is flowing through the washing water piping, and allows the dissolved water to flow out when the washing water has finished flowing. It consists of a check valve directly connected to the float part, and a dissolution chamber in which a molded body containing a solid acid as an active ingredient is installed and a part of the molded body is dissolved with introduced dissolution water. It is fine as long as it is suitable.

Further, the shape of the melting chamber is such that a molded body can be installed therein and an air flow opening of 1 to 200 m2, preferably 1 to 50 m2, is provided on the top and/or side surface. , in particular, there are no restrictions. If the total area of the air circulation holes exceeds 200 m2, the sublimation rate of paradichlorobenzene will be faster than the dissolution rate of the solid acid, leaving a porous molded body with the paradichlorobenzene layer removed, which will cause molding when it comes into contact with water. The body tends to collapse, making it difficult to adjust the dissolution rate of the molded product. Also, if the total area of the air circulation holes is less than 1 cm, the sublimation of paradichlorobenzene is suppressed, so that the surface of the molded product is A layer of paradichlorobenzene remains, and the dissolution of the solid acid, which is the active ingredient, is suppressed.
Antifouling and deodorizing effects deteriorate.

The size of the dissolution chamber used is such that the amount of dissolution water can be 100 to 1000. If the amount of dissolved water is less than 100d,
When the dissolved water containing the molded material flows over the toilet bowl surface, it cannot wet the entire surface of the toilet bowl, resulting in uneven black stain prevention effects on the toilet bowl surface.
If it is more than d, the dissolved solid acid concentration in the dissolved water becomes low, and the antifouling and cleaning effects become insufficient. The mechanism of the dissolver is that when the wash water does not flow through the wash water piping, there is no stagnation of water, and when the wash water is used, the water that starts flowing is introduced into the dissolver, and when the amount of water in the dissolver reaches a predetermined amount. When the introduction of washing water stops and the washing water has finished flowing through the washing water piping, the dissolved water that has dissolved a part of the molded object from the dissolver passes through the washing water piping, washes the toilet surface, and then flows into the toilet bowl. What stays in the trap is used.

If the molded body is installed in an existing toilet flush water piping system,
For example, if the toilet trap is installed above the toilet trap, the acid concentration in the flush water at the beginning of flushing when the toilet is used will be high, but the concentration in the flush water in the second half will be low, so the high acid concentration in the toilet trap will be Since the wash water is diluted with the subsequent wash water with a low acid concentration, the antifouling and deodorizing effects in the trap will not be sufficient. Furthermore, the method of placing chemicals on the toilet bowl surface has no effect on preventing black stains on the toilet bowl surface.

In addition, when the molded body is installed in a cleaning water retention tank such as a high tank or a low tank, the molded body will come into contact with a large amount of water, so in the case of a solid acid with high solubility, the amount of the molded body eluted into the water will be reduced. If the solubility of the solid acid is low, the amount of molded material eluted into water is small and the amount of dissolved water is large. The acid concentration becomes low, and the antifouling and deodorizing effects deteriorate.

The antifouling/deodorizing method of the present invention uses the molded body in a dissolver installed in the middle of a cleaning water pipe and having air circulation holes with a surface area of 1 to 20 cm2, so that when the cleaning water is not used, , Paradichlorobenzene sublimes from the surface of the molded object, solid acid and water-soluble components cover the surface of the molded object, and when using washing water, a small amount of water introduced into the dissolver is used to dissolve the water in a slow flow with only the up and down movement of the water level. The solid acid and water-soluble components covering the surface of the molded body are dissolved in water. In this way, the sublimation of paradichlorobenzene and the dissolution of the solid acid and water-soluble components are carried out in an alternate and balanced manner, so that the molded body is uniformly consumed on all sides, preventing excessive dissolution of the molded body or Since the molded product does not collapse and is consumed while maintaining its original shape, there is little change over time in the elution concentration of the active ingredient into the wash water, and furthermore, when the molded product is installed in an existing toilet flush water piping system. Compared to conventional methods, it is possible to extend the shelf life of the molded body, and by discharging the dissolved water into the toilet bowl after the washing water has finished flowing, there is less dilution by the washing water, so it is effective with a small amount of dissolved water. The present invention was completed based on the discovery that it is possible to prevent stains and deodorize toilet bowls.

[Effect]

Washing water usually contains about 0.1 to 0.01 ppm of water-soluble heavy metals such as iron and manganese mostly as hydroxides. When the wash water evaporates on the toilet surface and becomes nearly dry, heavy metals such as iron and manganese become concentrated, and heavy metal hydroxides such as iron and manganese reach a saturation concentration or higher and precipitate, and further react with oxygen in the air. It becomes a strong oxide and adheres to the toilet surface, which accumulates and becomes a dark brown to black stain commonly called limescale. Normally, black stain is a sliver-like substance that spreads downward from the flush water outflow hole of the toilet. It often occurs,
This is due to the washing water dripping from the washing water piping after most of the washing water has flowed out.

Therefore, precipitation of heavy metal hydroxides such as iron and manganese contained in the washing water due to concentration on the toilet surface is caused by the p
This can be reliably prevented by keeping H acidic. The lower the pH of the washing water, the more effective it is in preventing the precipitation of heavy metals, but if corrosion of the drain pipe is taken into account, the pH of the washing water should be 4 to 7, preferably 5 to 7. Furthermore, since heavy metals are precipitated from the washing water or are generated from dripping water after most of the washing water has flowed out, it is more effective to flush the washing water with a low pH after most of the washing water has flowed out. Yes, it is preferably adopted.

Urine usually contains 200 to 3 water-soluble calcium ions.
00ppm, phosphate ion 2000-2500ppm
include. In addition, carbonate ions are contained in the cleaning water, and are further replenished by dissolving carbon dioxide gas in the air. The pH of urine excreted from the body is around 5.5 to 6.5,
When left in the air, the pH will gradually rise, eventually reaching 9.
It reaches ~9°5. When the pH exceeds 7.5, turbidity occurs, and as the pH rises, the turbidity increases, and when the pH rises above 8.5, white precipitates of calcium apatite precipitate, and calcium carbonate crystals form on the surface in contact with air. Produces in a film form. These calcium apatite and calcium carbonate crystals, together with water-insoluble proteins and other organic matter produced by bacteria and enzymes, stick to the toilet trap and grow to form scales commonly called urinary stones.

Therefore, by keeping the pH of the mixed water of urine and flushing water in the toilet trap at 7.5 or lower, it is possible to prevent scale from sticking.Furthermore, when the pH is 7 or lower, the already fixed scale dissolves. It also has a removing effect. The lower the pH in the toilet trap, the better the scale adhesion prevention effect.
, preferably 5 to 7.

Urine contains a large amount of urea, and adults excrete about 30 g of urea per day. In the urine or the mixture of urine and washing water that remains in the toilet trap, urea is decomposed by the action of enzymes and bacteria, and ammonia is produced.
The pH of the urine or urine/wash water mixture increases. pH is 7
．． If ammonia is present in a neutral to acidic solution of 5 or less, the ammonia is fixed in the solution and does not emit into the air, so it does not cause a bad odor, but the pH of the solution
When the value is 8 or more, the amount of ammonia released into the air increases, causing a bad odor in the toilet. When there is scale attached to the toilet trap, enzymes and bacteria tend to proliferate in the scale, so urine decomposition is accelerated and more ammonia is generated than in a toilet without scale. Furthermore, if scale adheres to the toilet bowl or the toilet bowl surface,
Ammonia is generated by decomposition of urine attached to the skeleton.

Therefore, by maintaining the pH of the water retained in the toilet trap from neutral to acidic at 7.5 or less, ammonia can be prevented from escaping from the toilet trap. The lower the pH in the toilet trap, the better the ammonia dispersion prevention effect, but if you take corrosion of the drain pipe into consideration, the pH should be 4 to 7
．． 5, preferably 5 to 7. Furthermore, by wetting the surface of the toilet bowl with neutral to acidic water with a pH of 7.5 or less, ammonia generated in the toilet bowl is fixed and prevented from escaping into the air. Furthermore, the pH of the toilet bowl surface is
By flushing with an acidic cleaning solution of 7 or less, it is possible to prevent scale formation on the toilet surface and the toilet bowl, thereby reducing the source of ammonia generation.

If a molded product whose main component is a solid acid is placed in a dissolving vessel, and after the wash water has finished dissolving a part of the molded product, the solution flows into the toilet bowl from the wash water piping. Because the dissolved water in the dissolver wets the toilet surface without diluting it, it effectively prevents the precipitation of heavy metals such as iron and manganese, and the formation of scale on the toilet surface and perforation plate. The deodorizing effect of generated ammonia can also be efficiently achieved.

In addition, when the water dissolved in the molded object flows into the toilet trap, the dissolved water is partially diluted because cleaning water has already accumulated in the trap, but after the dissolved water flows into the toilet trap, the cleaning water Since there is no inflow of water, there is less dilution of dissolved water, and it is possible to effectively prevent scale formation and ammonia generation in the toilet trap.

The toilet bowl antifouling and deodorizing method of the present invention has a solid acid as a main component,
The mixed molded product with a base material containing a sublimable substance is dissolved in a dissolver installed in the middle of the washing water pipe, and the dissolved water flows out after the washing water flows out, and the solid acid dissolved water efficiently contaminates the toilet bowl surface. This is a method for preventing scale formation in toilet traps and deodorizing ammonia generated in toilet bowls.

〔Example〕

The present invention will be explained in more detail by way of examples.

However, the scope of the present invention is not limited in any way by the following examples.

■) Production of molded body Molded body 1 (Test sample 1) Orthophthalic acid = 49% by weight, ground paradichlorobenzene = 49% by weight, calcium stearate = 2% by weight were mixed and pressure molded to produce a cylindrical molded body with a diameter of 40n+m. did.

Molded object 2 (test sample 2) Powdered adipic acid: 60% by weight Paradichlorobenzene: 20% by weight Polyethylene glycol #1000: 10% by weight Nonionic surfactant: 10% by weight are heated and melted at 90°C to form a molten slurry. 50x50x2
The mixture was cooled and solidified in a 0 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded body 3 (test sample 3) Powdered fumaric acid = 40% by weight Paradichlorobenzene 740% by weight Polyethylene glycol #1000: 20% by weight were heated and melted at 90°C, and the molten slurry was prepared in a 50 x 50 x 2
The mixture was cooled and solidified in a 0 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded body 4 (Test sample 4) Powdered succinic acid di55% by weight Paradichlorobenzene: 20% by weight Ethylene oxide propion oxide copolymer: 10
Weight% Nonionic surfactant: 10% by weight Polyethylene glycol #1000: 5% by weight were heated and melted at 90°C, and the molten slurry was mixed into 40×4OX3
The mixture was cooled and solidified in a 0 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded body 5 (comparative sample 1) 40% by weight of powdered sulfamic acid, paradichlorobenzene: 40% by weight, and 20% by weight of polyethylene glycol #1000 were heated and melted at 90°C, and the molten slurry was mixed into 50×50×2
The mixture was cooled and solidified in a 0 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded object 6 (comparative sample 2) Powdered sodium hydrogen sulfate: 50% by weight Paradichlorobenzene = 35% by weight Polyethylene glycol #1000: 15% by weight were heated and melted at 90°C, and the molten slurry was mixed into a 50×50×2
The mixture was cooled and solidified in a 0 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded object 7 (comparative sample 3) Polyethylene glycol #1000: 40% by weight ethyl oxide-propion oxide copolymer (nonionic surfactant) = 60% by weight was heated and melted at 9θ°C,
The molten slurry was cooled and solidified in a 50 x 50 x 20 mm rectangular parallelepiped container to produce a rectangular parallelepiped shaped body.

Molded body 8 (comparative sample 4) A deodorizing and anti-scaling agent containing a commercially available bactericide and a nonionic surfactant as active ingredients.

2) Test dissolver The test dissolver has six 3x20mm slit-shaped air circulation holes at the top, and the water at the beginning of the flow of toilet flushing water is introduced into the dissolver, and a predetermined amount of water is introduced. When the introduction stops and a part of the molded body placed in the container is dissolved, and the flushing water in the piping has finished flowing, the dissolved water flows from the dissolver through the flushing water piping and onto the surface of the toilet bowl.

In the dissolver used in the test, the amount of dissolving water introduced into the dissolver for dissolving the molded object was 300.

3) Performance evaluation test-1 A high tank type urinal for men was installed in a constant temperature room at 25°, a dissolver 1 was installed in the middle of the washing water pipe above the urinal, and molded bodies 1 to 6 were placed in it. 20% tap water as washing water
31 times per minute. (Not used as an actual toilet) l) Evaluation items and evaluation method Evaluation items 1) The weight loss rate of the molded body was measured once a week.

Evaluation Item 21 The acid concentration of the water remaining in the toilet trap was measured once every week.

2) Evaluation test results The evaluation test results are shown in Table 1.

4) Performance evaluation test-2 A performance evaluation test was conducted in an actual toilet for 5 months using the method shown below.

1) Method for installing molded bodies Molded bodies 1 to 8 were installed in the following locations of a high tank type urinal for men.

Installation position 1 Installation position 2 between the high tank and the toilet bowl Installation position 3 Install a dissolver in a part of the cleaning water piping. and the molded body was placed therein.

Place the molded object directly on the toilet bowl plate. did.

Immersed in cleaning water in high tank The molded body was placed in such a state that

2) Test method In the test, the items in section 3) were measured once a month.

In addition, molded bodies that were 70% or more consumed during monthly measurements were replaced with new molded bodies.

3) Evaluation items and evaluation methods Evaluation item 1 pH of water stagnant in the toilet trap: A new acid form was installed, and the pH was measured one week later, immediately after using the wash water.

Evaluation item 2: pH of water adhering to the toilet surface: A new acid form was installed,
One week later, the pH of the wash water adhering to the toilet bowl surface was measured immediately after use.

Evaluation item 3: Toilet bowl surface contamination The state of contamination on the toilet bowl surface was measured by visual observation.

Evaluation item 4 Amount of scale deposited in the toilet trap A stainless steel wire mesh of 25mm diameter x 70mm was placed in the toilet trap, and the weight increase after 5 months was measured.

Evaluation item 5: Odor The odor generated from the second toilet was measured by a sensitivity test.

4) Evaluation test results The evaluation test results are shown in Table 2.

〔Effect of the invention〕

In the present invention, a toilet bowl antifouling/deodorizing method in which a molded body of a mixture of an active ingredient solid acid and a molding base is installed in a dissolving device installed in the middle of the toilet flushing water pipe is described in the table of the evaluation test results. As shown in the figure, since the pH of the water stagnant in the toilet trap can be maintained at an acidic level, scale formation in the toilet trap and bad odor from the toilet bowl can be prevented, and at the same time, the wash water with an acidic pH can be prevented from flowing over the toilet bowl surface. This also prevents contamination of the toilet surface.

The present invention provides a method for preventing contamination of a toilet bowl surface, preventing scale formation in a toilet bowl trap, and preventing generation of a bad odor from a toilet bowl, and has extremely great public health and industrial significance.

Claims (1)

[Scope of Claims] (1) A molded body made of at least one solid acid selected from the group consisting of adipic acid, succinic acid, fumaric acid, and orthophthalic acid and a molding base containing a sublimable substance is made into a toilet bowl. A method for preventing and deodorizing a toilet bowl, characterized in that the water is dissolved in a dissolver installed in the middle of the flushing water pipe, and the dissolved water flows down the toilet surface and into the toilet trap (2) In claim (1), A toilet bowl antifouling/deodorizing method (3) in which the molded article contains 30 to 70% by weight of a solid acid. (4) In claim (1) or (3), the sublimable substance is paradichlorobenzene, and the paradichlorobenzene content is 70% by weight in the molding base. 40% by weight or more, and 15 to 70% by weight in the molded article (5) A method for antifouling and deodorizing a toilet bowl (5) In claim (1), the molding base comprises a sublimable substance, a water-soluble polymer and (6) A toilet bowl antifouling/deodorizing method comprising 30 to 70% of the molding base in the molded body, comprising a surfactant and/or a surfactant. A toilet bowl antifouling and deodorizing method having a structure in which a part of the water flows into a dissolving vessel and dissolves the molded body components, and after the washing water has finished flowing, the dissolved water in which the molded body components have been dissolved flows into the washing water pipe. (7) A toilet bowl antifouling/deodorizing method according to claim (1), wherein the dissolver has a structure in which the dissolver has holes for air circulation with the outside on the top and/or side surfaces of the dissolver (8) Claim In item (1) or item (8), the total area of holes for air circulation in the dissolver is 1 to 20 cm^
2. Toilet bowl antifouling and deodorizing method