JP4925308B2 - Tablet detergent - Google Patents

Description

  The present invention relates to a tablet-type cleaning agent, which has a feature of rapidly releasing a high concentration of active oxygen upon contact with water and subsequently releasing a low concentration of active halogen over a long period of time. .

In recent years, due to an increase in hygiene awareness, attention has been focused on a slime-removing cleaning agent that is used around a kitchen sink or a bathroom drain.
Around kitchen sinks and bathroom drains, food traps and scales adhere, and there is moderate moisture, so various germs and molds propagate and connect to these drains and drains. Slime is generated inside the drainage pipe. Numeri is a collection of microorganisms such as germs and molds, and slimy sticky substances that are produced when they breed, but it is extremely unsanitary, causing food poisoning, Legionella infection and bad odor, It is widely performed to remove slime and prevent the occurrence of slime using a drug that releases active oxygen or active halogen.

  In order to remove such slime, it is effective to kill the microorganisms living inside the slime by contacting the slime with a high concentration of active oxygen or active halogen. On the other hand, in order to prevent the occurrence of slime, it is sufficient that a low concentration of active oxygen or active halogen exists in the place where the slime occurs.

For example, in Patent Document 1, active chlorine (active halogen) is released by putting a tablet mainly composed of trichloroisocyanuric acid in a net-like sachet and placing it on the bottom surface of a strainer to contact waste water. A method for purifying the drainage part of the sink has been proposed.
However, since trichloroisocyanuric acid has low solubility in water and the concentration of active chlorine eluted in the wastewater is low, it exhibits an excellent effect in preventing the occurrence of slime. It was scarce.

In order to solve the above problems, Patent Document 2 discloses that a trichloroisocyanuric acid tablet having a low solubility and a sodium dichloroisocyanurate tablet having a high solubility are mutually connected in a water flow case (hereinafter referred to as an applicator). A slime removal that has been stored without contact has been proposed.
In other words, this slime removal quickly releases high concentration of active chlorine when it comes into contact with kitchen wastewater, and subsequently releases low concentration of active chlorine over a long period of time, which is excellent in removing and preventing the occurrence of slime. Demonstrate the effect. However, when sodium dichloroisocyanurate is used, a chlorine odor is generated due to the release of high concentration of active chlorine.
In addition, it takes time and effort to set two different types of tablets in the applicator, and the two tablets rub against each other during packaging and transporting the slime, and the tablets may crack or crack. In addition, a plurality of positioning pins for setting the two tablets so that they do not come into contact with each other must be provided in the applicator, resulting in a problem that the cost of the applicator increases.

As tablets similar to the present invention, Patent Document 3 contains oxygen bleaching agents such as sodium percarbonate and sodium perborate and chlorine bleaching agents such as trichloroisocyanuric acid and sodium dichloroisocyanurate as active ingredients. A granule formulation or tablet is disclosed.
However, since this tablet is formed by mixing oxygen bleach and chlorine bleach uniformly, it combines sodium percarbonate or sodium perborate with high solubility and trichloroisocyanuric acid with low solubility. Even in this case, since the dissolution rate of sodium percarbonate and sodium perborate is high, the dissolution rate of the tablet is also accelerated, so that low concentration of active chlorine cannot be released over a long period of time.

  A tablet similar to the above is also disclosed in Patent Document 4, but this tablet contains sodium percarbonate or sodium perborate and an alkali metal salt of chlorinated isocyanuric acid such as sodium dichloroisocyanurate as active ingredients. Since these active ingredients have high solubility, the dissolution of the tablet is completed quickly, and a low concentration of active chlorine cannot be released over a long period of time as described above.

JP-A-6-306906 JP-A-10-152698 JP 2003-246998 A JP 60-1212714 A

  The present invention can quickly release a high concentration of active oxygen immediately after contact with water, and after the release of the high concentration of active oxygen is completed, the low concentration of active halogen is continued for a long time. It is an object of the present invention to provide a tablet-type detergent that can be released.

As a result of intensive studies and studies to solve the above-mentioned problems, the present inventor premixed potassium monohydrogen persulfate double salt with at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound. A tablet-type cleaning comprising a layer containing a monobasic potassium hydrogen persulfate double salt and a layer containing at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound. The present inventors have found that the intended purpose can be achieved by using the agent, and have completed the present invention.
Moreover, 2nd invention is contained in the layer in which riboflavin contains at least 1 type selected from trichloroisocyanuric acid or a halogenated hydantoin compound in the layer which contains monobasic potassium hydrogen persulfate double salt in 1st invention. It is a tablet type washing | cleaning agent characterized by the above-mentioned.

Since the tablet-type detergent of the present invention is composed of a monobasic potassium hydrogen persulfate double salt and a layer containing each of at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound independently, Without compromising the inherent dissolution performance, the tablet mainly composed of potassium monohydrogen persulfate double salt and the tablet composed mainly of at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound The slow dissolution performance possessed can be developed at the same time.
Moreover, since riboflavin is contained in a layer containing potassium monohydrogen persulfate double salt or a layer containing at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound, the tablet-type detergent of the present invention The aesthetics can be improved and the product value can be increased.

The present invention will be described in detail below.
The monopotassium monohydrogen persulfate used in the practice of the present invention is known as a solid peroxo compound, but dissolves when it comes into contact with water and releases active oxygen having strong oxidizing ability. They are widely used as active ingredients such as bactericides and deodorants.

As the monopersulfate potassium double salt, de Yupon Co., Ltd. under the trade name "OXONE" as known monopersulfate potassium double salt _{(Formula: 2KHSO 5 · KHSO 4 · K} 2 SO 4) industrial It is easy to obtain as a chemical and can be suitably used .

Monobasic potassium hydrogen persulfate has a high solubility in water and a high dissolution rate . Mono solubility of potassium hydrogen persulfate double salt is 25 g, when in contact with water, rapidly releases high concentrations of active oxygen.

  The trichloroisocyanuric acid used in the practice of the present invention is a solid compound represented by the chemical formula (1). When contacted with water, active chlorine having a strong oxidizing ability similar to active oxygen is obtained. Because of its release, it is widely used as an active ingredient such as bleach, bactericides and deodorants.

  The halogenated hydantoin compound used in the practice of the present invention is a solid compound represented by the chemical formula of Chemical Formula 2 and, when brought into contact with water, is an active halogen (active chlorine and / or as with trichloroisocyanuric acid). Since it releases active bromine), it is widely used as an active ingredient such as bleaching agents, disinfectants and deodorants.

（但し、Ｒ₁及びＲ₂は同一又は異なって水素原子もしくは炭素数１〜４のアルキル基を表し、Ｘ₁及びＸ₂は同一又は異なって臭素原子もしくは塩素原子を表す。）

(However, R ₁ and R ₂ are the same or different and represent a hydrogen atom or an alkyl group having 1 to 4 carbon atoms, and X ₁ and X ₂ are the same or different and represent a bromine atom or a chlorine atom.)

  Examples of the halogenated hydantoin compound include 1,3-dibromo-5,5-dimethylhydantoin, 1-bromo-3-chloro-5,5-dimethylhydantoin, and 3-bromo-1-chloro-5,5-dimethylhydantoin. 1,3-dichloro-5,5-dimethylhydantoin, 1,3-dichloro-5-ethyl-5-methylhydantoin, and the like.

  The trichloroisocyanuric acid has a solubility in water of about 1.2 g, and the halogenated hydantoin compound has a solubility in water of about 0.1 to 0.5 g although it varies depending on the substance. Since it is slow, it can release a low concentration of active halogen over a long time when in contact with water.

The tablet in the present invention is a molded product produced by a method of filling a powder or granular raw material into a mold and pressurizing (hereinafter sometimes referred to as tableting), and is produced industrially. In doing so, a known pressurizing tablet press composed of a die (rice mortar) and a pressurizing device is preferably used.
That is, powdery or granular potassium monohydrogen persulfate double salt and powdery or granular trichloroisocyanuric acid or a halogenated hydantoin compound are sequentially added to the mortar, and the mortar and pestle are connected via a pressurizing device. When a pressure is applied between them, a layer containing potassium monohydrogen persulfate double salt (hereinafter sometimes referred to as the first layer) and a layer containing trichloroisocyanuric acid or a halogenated hydantoin compound (hereinafter referred to as the second layer). And a tablet having a shape formed of a mortar and a punch. The order of adding the potassium hydrogen persulfate double salt and trichloroisocyanuric acid or the halogenated hydantoin compound may be arbitrary.

  As such a pressure-type tableting machine, a single-shot tableting machine that compresses one tablet at a time or a plurality of molds (ushu) are mounted along a rotating disk, and while this rotates one time, A rotary tableting machine capable of continuously performing a series of operations such as filling, pressure molding, and taking out tablets can be used.

  Examples of the single-punch tablet press include “MINIPRESSM II” and “PICCOLA” manufactured by RIVA, a solid powder molding machine manufactured by Kikusui Seisakusho, a single tablet press manufactured by Okada Seiko Co., Ltd. and a standing press manufactured by Fuji Pharmaceutical Machinery Co., Ltd. Is mentioned.

  Examples of the rotary tableting machine include “Rotary Press TRP Series” manufactured by Mori Machinery, “Clean Press Series” manufactured by Kikusui Seisakusho, “Tough Press Series”, “P Series” manufactured by FETTE, “ “PT series”, “PH series” manufactured by KORSCH, “B series” manufactured by Hata Plant, and the like.

  The shape and size of the tablet-type detergent of the present invention are not particularly limited, but are determined in consideration of handling convenience. Examples of the shape of the tablet include a cylindrical shape, a cube shape, and a rectangular parallelepiped shape. In the case of a cylindrical shape, it is practically preferable that the diameter is 5 to 100 mm, and also in the case of a cube or a rectangular parallelepiped shape, the long side (the longest side in a rectangular parallelepiped) is also the same. It is preferable that it is 5-100 mm.

In producing the tablet type cleaning agent of the present invention, preferably tableting pressure of approximately 100 to 300 / cm ^2, when tableting pressure is less than 100 kg / cm ^2, the weak strength of the molded tablets, When handling or transporting, the tablet tends to collapse, and when it is higher than 300 kg / cm ² , the tablet is peeled off (capping) or layered (laminating) when taking out the tablet from the mortar. The phenomenon tends to occur.

In addition to the first layer and the second layer, the tablet-type detergent of the present invention may further include a layer containing the above-mentioned potassium monohydrogen persulfate double salt as a third layer. That is, it is also possible to adopt an aspect having a three-layer structure in which a layer containing trichloroisocyanuric acid or a halogenated hydantoin compound is sandwiched between layers containing monobasic potassium hydrogen persulfate double salt .
Similarly, a mode having a three-layer structure in which a layer containing monobasic potassium hydrogen persulfate double salt is sandwiched between layers containing trichloroisocyanuric acid or a halogenated hydantoin compound is also possible.

The thickness of the first layer and the thickness of the second layer can be arbitrarily adjusted. By appropriately adjusting the thickness of both, the amount of monochloro potassium persulfate double salt and trichloroisocyanuric acid or halogenated hydantoin compound contained in the tablet detergent of the present invention can be arbitrarily set, It is possible to control the time for releasing high concentration active oxygen and the time for releasing low concentration active halogen.

So long as the object of the present invention is achieved, a potassium monohydrogen persulfate double salt and a drug other than trichloroisocyanuric acid or a halogenated hydantoin compound can be used in combination.
In the practice of the present invention, a surfactant may be used to enhance the cleaning effect. The surfactant can be contained in both the first layer and the second layer, or one of them.
Moreover, it is good also as a structure which provides the layer containing surfactant together with an extender (excipient) separately from the said 1st layer and 2nd layer. Examples of the bulking agent include sodium silicate, sodium chloride, alkali metal silicate, carbonate, phosphate, sulfate and the like.

  Conventionally known anionic surfactants, nonionic surfactants, cationic surfactants, and zwitterionic surfactants can be arbitrarily employed as the surfactant.

  Examples of the anionic surfactant include carboxylic acid type anionic surfactants such as aliphatic monocarboxylates, polyoxyethylene alkyl ether carboxylates, N-arsyl sarcosine salts, N-acyl glutamates, etc. , Dialkyl sulfosuccinate, alkyl sulfonate, alpha olefin sulfonate, linear alkyl benzene sulfonate, alkyl (branched) benzene sulfonate, naphthalene sulfonate-formaldehyde condensate, alkyl naphthalene sulfonate, N -Sulphonic acid type anionic surfactants such as methyl-N-acyl taurate, alkyl sulfate ester (alkyl sulfate), polyoxyethylene alkyl ether sulfate, fat and oil sulfate ester (sulfated oil) / castor oil Sulfate type such as sulfated oil Ionic surface active agents, alkyl phosphates, polyoxyethylene alkyl ether phosphates, such as phosphate ester type anionic surface active agents such as polyoxyethylene alkyl phenyl ether phosphoric acid salts.

  Examples of the nonionic surfactant include fatty acid diethanolamide, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, glycerin fatty acid ester, sorbitan fatty acid ester, and sucrose fatty acid ester.

  Examples of the cationic surfactant include quaternary ammonium salt type cationic surfactants such as alkyltrimethylammonium chloride, alkyltriethylammonium chloride, dialkyldimethylammonium chloride, and alkylpyridinium chloride.

  Examples of the zwitterionic surfactant include alkyl carboxybetaines, alkylsulfoxybetaines, alkylamidohydroxysulfobetaines, alkylamidoamine type betaines, alkylimidazoline type betaines, and the like.

  When a surfactant is used, it is preferable that each of the layers containing the first layer and the second layer is contained in a ratio of about 0.001 to 1% by weight. By using a surfactant in combination, active oxygen can easily enter the inside of the slime, and the killing and peeling effect of the slime can be enhanced. Moreover, the cleaning effect of dirt components other than slime can be enhanced.

  In order to improve the moldability of the tablet-type detergent of the present invention, the first layer and the second layer can contain a binder and a lubricant in a proportion of about 0.1 to 5% by weight. By improving the moldability, it is possible to prevent the chipping or cracking of the tablet that occurs during manufacture or transportation of the tablet.

  The binder is not particularly limited as long as it has a function of binding solid particles and is preferably water-soluble. For example, carboxymethyl cellulose, sodium carboxymethyl cellulose, dextrin, polyethylene glycol, polyvinyl alcohol, polyalkylene glycol, lignin Examples include sulfonate, gum arabic, starches, and sucrose.

  The lubricant is not particularly limited as long as it has a function of improving the fluidity, packing property, and adhesion of solid particles. For example, calcium stearate, magnesium stearate, sodium stearate, sodium benzoate, orthoboric acid. , Talc and the like.

In order to enhance the solubility of the tablet of the present invention, a foaming agent or a disintegrating agent can be contained in the layer containing potassium monohydrogen persulfate double salt .

A foaming agent consists of a combination of an acidic substance and an alkaline substance, and when it comes into contact with water, both react to generate gas, so that the disintegration of the tablet can be enhanced. Examples of the acidic substance include citric acid, tartaric acid, oxalic acid, succinic acid, maleic acid, phthalic acid, malic acid, adipic acid and other organic acids, sodium dihydrogen phosphate, potassium dihydrogen phosphate, diphosphoric acid phosphate. Examples thereof include hydrogen salts such as ammonium hydrogen and potassium hydrogen sulfate, and alums such as potassium alum and ammonium alum.
Examples of the alkaline substance include carbonates such as sodium carbonate, potassium carbonate, calcium carbonate, magnesium carbonate, and ammonium carbonate, and bicarbonates such as sodium bicarbonate and potassium bicarbonate.

  The disintegrant absorbs water and swells when contacted with water, so that the tablet can be disintegrated. Examples thereof include carboxymethylcellulose calcium, crosslinked polyvinylpyrrolidone, and low-substituted hydroxypropylcellulose. The starch described above functions as a binder but also functions as a disintegrant.

  When the tablet-type cleaning agent of the present invention is used, wastewater containing active halogen is generated, so that the metal part of the flow channel through which the wastewater flows may corrode. In order to prevent this, a layer containing trichloroisocyanuric acid or a halogenated hydantoin compound can contain a rust inhibitor.

  As anti-corrosion agents, conventionally known inorganic corrosion inhibitors such as nitrites, silicates and polyphosphates, and organic corrosion inhibitors such as carboxylic acids, metal soaps, sulfonic acids, amines, esters and phosphate esters And chelating compounds such as EDTA, gluconic acid, nitrilotriacetic acid, and the like, and by using an appropriate amount of these rust inhibitors, corrosion of the metal can be suppressed.

In order to color or perfume the tablet detergent of the present invention, conventionally known dyes, pigments or fragrances can be contained in the tablets. In this case, in order to avoid contact with monobasic potassium hydrogen persulfate double salt , trichloroisocyanuric acid or halogenated hydantoin compound, a layer containing a dye, pigment or fragrance together with an extender (excipient) is used. It is good also as a structure provided separately from 1st layer and 2nd layer.

In the present invention, riboflavin was used to color the tablets. Riboflavin is a compound proposed by the applicant of the present invention as a yellow colorant having excellent oxidation resistance in Japanese Patent Application No. 2005-264173, but a proportion of 0.01 to 5% by weight depending on the desired degree of coloration. Thus, it may be contained in at least one layer selected from the first layer and the second layer.
In the case where riboflavin is contained in both the first layer and the second layer, the content ratio of riboflavin contained in both layers may be the same, but the coloration degree can be obtained by using different content ratios. Therefore, the aesthetics of the tablet can be further enhanced, and the first layer and the second layer constituting the tablet can be distinguished. In order to reduce the drug cost related to riboflavin, riboflavin may be contained in either the first layer or the second layer.

  When the content of riboflavin is less than 0.01% by weight, the degree of coloring is not sufficient, and even when it is more than 5% by weight, there is no significant change in the degree of coloring, and the drug cost related to riboflavin Is just bloated.

Tablets type cleaning agent of the present invention, the mono-potassium hydrogen persulfate double salt, unlike the tablets premixed by pressure molding and trichloroisocyanuric acid or a halogenated hydantoin compound, and a potassium monopersulfate hydrogen double salt Since both trichloroisocyanuric acid and halogenated hydantoin compound form independent layers, potassium monopersulfate double salt and trichloroisocyanuric acid or halogenated hydantoin compound inherently exhibit the dissolution performance inherently. Can be made.
That is, when the tablet-type detergent of the present invention is brought into contact with water, the layer containing potassium monohydrogen persulfate double salt and the layer containing trichloroisocyanuric acid or a halogenated hydantoin compound start to dissolve simultaneously. First, the dissolution of the layer containing potassium monohydrogen persulfate double salt is completed, but the layer containing trichloroisocyanuric acid or a halogenated hydantoin compound is still being dissolved, and the release of the active halogen continues.

  Pipes connected to the drain outlet and around the drain outlet because food residue and scales adhere to the kitchen sink and the bathroom outlet, and there is moderate moisture, so that germs and molds propagate. There is a slime inside. Numery is a collection of microorganisms such as germs and molds and slimy sticky substances that are produced when they are propagated. In order to remove such scumming, high concentrations of active oxygen and active halogen are given to Numery. It is effective to kill the microorganisms that live in the slime through contact. On the other hand, in order to prevent the occurrence of slime, it is sufficient that a low concentration of active oxygen or active halogen exists in the place where the slime occurs.

By installing the tablet-type cleaning agent of the present invention around the drain of a kitchen sink or bathroom, when water is used in the kitchen or bathroom, a high concentration of active oxygen is quickly released into the waste water. Then, since low-concentration active halogen can be released over a long period of time, it is possible to remove the slime around the drainage outlet where the drainage flows and inside the drainage pipe connected to the drainage, and to prevent the occurrence of slime Become.
The tablet-type cleaning agent of the present invention is suitable as a sterilization cleaning agent for kitchens such as sinks and drains used for removal and prevention of slime, and a sterilization cleaning agent for bathrooms such as bathtubs and drains. It is a thing. Moreover, as a use similar to this, it can be used suitably also as a washing | cleaning agent aiming at the removal of the urine stone of a toilet bowl, and the adhesion prevention effect.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to these Examples. In addition, the raw material chemical | medical agent used for the Example and the evaluation test method are as follows.

[Raw drug]
・ Trichloroisocyanuric acid (manufactured by Shikoku Kasei Kogyo Co., Ltd., “Neochlor-90”, granule, effective chlorine content: about 90%)
・ Potassium monohydrogen persulfate double salt (manufactured by DuPont, “OXONE”)
・ Riboflavin (Wako Pure Chemical Industries, Reagent)

[Smoothing test]
試 験 We asked a tenant in an apartment to conduct a test (monitor) and investigated the occurrence of slime around the drainage outlet of the kitchen sink. Prior to the start of the test, there should be a period of at least one week in which the area around the drain outlet of the sink is not cleaned, and if the slime removal is used, the use is stopped and the area around the drain outlet is stopped. It was confirmed before the start of the test that this occurred.
The test method is as follows. Put one tablet in a commercially available applicator and place it on the bottom of the net basket (garbage removal basket) installed inside the trap at the sink drain of the kitchen sink for normal housework such as cooking and washing dishes at the sink. I was asked to. The test period was 2 weeks, and the tablet was used up without being replenished within that period.
The occurrence of slime was confirmed by visual observation and finger touching around the bottom of the net cage and around the trap at the bottom of the net cage.

[Example 1]
A potassium monohydrogen persulfate double salt containing 0.1% by weight of riboflavin was prepared by mixing potassium monohydrogen persulfate double salt and riboflavin.
First, 15 g of trichloroisocyanuric acid was put into a mortar, the mortar was shaken, and trichloroisocyanuric acid was uniformly filled into the mortar. Subsequently, 5 g of potassium monohydrogen persulfate double salt containing riboflavin prepared in advance was added, and the mortar was shaken again. Next, this pestle to be paired with the mortar was set in a pressurizing apparatus, and trichloroisocyanuric acid and potassium monohydrogen persulfate double salt were tableted at a pressure of 200 kg / cm ^{2 to} form a cylindrical tablet (diameter 30 mm, 15 mm, weight 20 g).
When an overview of the obtained tablet was visually observed, a layer of potassium monohydrogen persulfate double salt colored yellow was clearly formed on the upper part of the tablet. It was recognized that it was composed of two layers, a layer containing a salt and a layer containing trichloroisocyanuric acid.

[Example 2]
A slime removal test was carried out on the tablets produced in Example 1 (hereinafter referred to as tablets A).
Further, as a control test, a tablet composed of only potassium monohydrogen persulfate double salt (diameter 20 mm, thickness, 6 mm, weight 5 g, hereinafter referred to as tablet B) and a tablet composed solely of trichloroisocyanuric acid (diameter 30 mm, thickness). 12 mm, weight 15 g, hereinafter referred to as tablet C), and a slime removal test was also conducted on these tablets.
In addition, since the usage of water differs for each household that requested monitoring of the slime removal test, the same tablet was tested in three households.
In the case of tablet A, one week after the start of the test, almost no slime adhered to the bottom of the net cage, the bottom of the trap, and the periphery thereof. Further, even after 2 weeks, no slime adhered.
In the case of the tablet B, the slime hardly adhered after one week as described above, but new slime was generated and was adhering after two weeks.
In the case of Tablet C, some adhesion of slime was observed one week after the start of the test, but almost no slime was adhered after two weeks.
Tablets A and C remained undissolved at a rate of about 10 to 30% even two weeks after the start of the test, but tablet B was completely dissolved one day after the start of the test.

In the slime removal test employed in Example 2, when water is used in the sink, the waste water that has dissolved the active ingredients in the tablet by contacting the tablet is discharged around the bottom of the net cage or the trap around the lower portion of the net cage. It flows into the drain pipe connected to the trap while in contact.
According to the test results described above, the effect of removing slime around the bottom of the net cage where drainage flows and the trap around the lower part of the mesh cage and preventing the occurrence of slime were confirmed, so the drainage pipe connected to the trap where drainage also flows It is also expected to have a slime removal effect and a slime generation prevention effect.

Claims (2)

A tablet formed by press-molding potassium monopersulfate double salt and at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound in advance, and containing monobasic potassium hydrogen persulfate double salt And a layer containing at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound. The tablet-type detergent according to claim 1, wherein riboflavin is contained in a layer containing potassium monohydrogen persulfate double salt or a layer containing at least one selected from trichloroisocyanuric acid or a halogenated hydantoin compound. .