JP2003160405A - Rapidly soluble chlorinated isocyanuric acid formed material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rapidly soluble chlorinated isocyanuric acid formed material excellent in disintegration property in the case of contact with water, having rapid dissolution rate to water, capable of rapidly feeding active chlorine having high concentration, excellent in storage stability and enabling easy handling in storing. <P>SOLUTION: This rapidly soluble chlorinated isocyanuric acid formed material is obtained by forming a composition comprising trichloroisocyanuric acid, sodium dichloroisocyanurate and carboxymethylcellulose calcium salt under pressure. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a chlorinated isocyanuric acid molded product having fast-dissolving property, and more specifically, when the molded product is immersed in water, the molded product is swollen and disintegrated in water to rapidly dissolve, and It is a fast-dissolving chlorinated isocyanuric acid molding capable of supplying a concentration of active chlorine. The molded product is most suitable for superchlorination in a swimming pool, and can be suitably used in places other than the swimming pool as long as a high concentration of active chlorine is required.

[0002]

2. Description of the Related Art Trichloroisocyanuric acid has a high content of active chlorine of about 90%, is easy to handle because it is solid, and has a good persistence of active chlorine in water. It is widely used as a sterilizing agent. However, while trichloroisocyanuric acid has excellent properties as a germicidal disinfectant for pool water, etc., it has a low dissolution rate in water, so the pool water before use is treated with a high concentration of active chlorine, so-called super chlorination. Is not suitable.

In order to improve such problems, attempts have been made to compound various chemical agents with trichloroisocyanuric acid. For example, JP-A-51-139628
No. 54-160730 and JP-A-5-4340.
Japanese Patent Publication 7 proposes a tablet containing trichloroisocyanuric acid and dichloroisocyanurate. However, since these sterilizing and disinfecting tablets are highly hygroscopic, they have a drawback that they are chemically decomposed during storage to generate chlorine gas, and a satisfactory rapid solubility is not obtained. Furthermore, the purpose of adding the dihydrate salt of dichloroisocyanurate is to supply a certain amount of chlorine for a long period of time without swelling or disintegrating when immersed in water. In addition, a formulation obtained by adding an anhydrous salt of dichloroisocyanurate to a molded product under pressure is swollen / disintegrated as a result when immersed in water, but the disintegration rate is slow and rapid dissolution is not achieved.

JP-A-63-239203 and JP-A-1-128905 describe tablets having an improved dissolution rate by blending trichloroisocyanuric acid and an inorganic compound such as boric acid or sodium tripolyphosphate. ing. The use of the above boric acid is not preferable because the regulations are being tightened due to the problem of water pollution.

[0005]

In view of the above circumstances, it is excellent in disintegration when contacted with water, has a high dissolution rate in water, can rapidly supply a high concentration of active chlorine, and is stable in storage. It is an object of the present invention to provide a fast-soluble chlorinated isocyanuric acid molded product which is excellent in handling and easy to handle during storage.

[0006]

Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that molding obtained by blending trichloroisocyanuric acid, sodium dichloroisocyanurate and calcium salt of carboxymethylcellulose. When the product is dipped in water, it can easily swell and disintegrate to generate a high concentration of active chlorine, and further, by containing magnesium sulfate in the molded product, the storage stability of the molded product is improved. It was discovered that the present invention was completed.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The chlorinated isocyanuric acid used in the present invention is trichloroisocyanuric acid and sodium dichloroisocyanuric acid, which are used in combination. In addition,
Sodium dichloroisocyanurate is preferably an anhydrous salt. The blending amount of trichloroisocyanuric acid used in the present invention is preferably 10 to 50 parts by weight, and the blending amount of sodium dichloroisocyanurate is preferably 40 to 90 parts by weight. The dissolution rate and the elution amount of active chlorine can be adjusted by arbitrarily setting the compounding ratio of trichloroisocyanuric acid and sodium dichloroisocyanurate within the above range.

The calcium salt of carboxymethyl cellulose used in the present invention functions as a disintegrating agent for molded articles,
The blending amount is preferably 1 to 10 parts by weight, and when it is less than 1 part by weight, the disintegration property of the molded product is not satisfactory, and when it is more than 10 parts by weight, the active chlorine content in the molded product decreases. To do.

Magnesium sulfate has an effect of suppressing the generation of decomposition gas and improving the storage stability of the press-molded product, and its compounding amount is preferably 1 to 10 parts by weight, and less than 1 part by weight. In addition, the storage stability of the molded product cannot be expected to be improved, and if it exceeds 10 parts by weight, the amount of active chlorine in the molded product decreases.

The trichloroisocyanuric acid used in the present invention is preferably in powder form, preferably the particle size of trichloroisocyanuric acid is 400 μm or less, and 75
A powder having a particle diameter of 70 μm or less and a proportion of 70 to 90% by weight is preferable. Further, it is preferable that the sodium dichloroisocyanurate has a particle diameter of 600 μm or less, and the proportion of particles in the range of 150 to 450 μm is 90% by weight or more. If the proportion of sodium dichloroisocyanurate having a particle size of 150 μm or less is more than 10% by weight, the pressure moldability is deteriorated, which is not preferable. Such a particle size distribution facilitates pressure molding into granules, briquettes, tablets and the like, and is particularly suitable for molding granules and briquettes.

The dissolution rate of trichloroisocyanuric acid is
The particle size has a large effect, and if a particle size of 400 μm or more is used, trichloroisocyanuric acid remains undissolved,
This results in a reduced dissolution rate. However, even though trichloroisocyanuric acid, which is an acidic drug, is slowly soluble, when fine powder with a particle size of 75 μm or less is used,
In addition to increasing the surface area, the coexistence of almost neutral and fast-dissolving sodium dichloroisocyanurate causes a weak neutralization reaction to promote dissolution.

Further, in the practice of the present invention, lubricants such as magnesium stearate, calcium stearate and talc may be added if necessary. The fast-dissolving chlorinated isocyanuric acid molded product of the present invention is not limited to sterilization of swimming pool water, but by selecting the shape and size of the molded product, a bathhouse, fire-prevention water, microorganisms in lakes and the like. It can also be widely applied for the purpose of preventing the growth of algae, the generation of malodor, and the like.

[0013]

EXAMPLES The present invention will be specifically described below with reference to examples and comparative examples, but the present invention is not limited thereto. The raw materials and evaluation test methods used in the examples are as follows.

[Raw Material] Trichloroisocyanuric acid (manufactured by Shikoku Kasei Co., theoretical effective chlorine content 91.53%) 400-75 μm particle size 1
A particle size distribution of 6% by weight and a particle diameter of 75 μm or less and 84% by weight was used. -Sodium dichloroisocyanurate (manufactured by Shikoku Kasei Co., Ltd., theoretical effective chlorine amount 64.48%, anhydrous salt) 600-450 μm particle size 2% by weight, 450-15
The particle size distribution was such that the particle size of 0 μm was 93% by weight and the particle size of 150 μm or less was 5% by weight.・ Calcium salt of carboxymethyl cellulose (manufactured by Daicel Chemical) ・ Magnesium sulfate (manufactured by Makai Kasei, anhydrous salt)

[Disintegration test] A 2 L beaker was placed at a height of about 10 cm from the bottom of the beaker for 12 mesh (opening 1.4.
mm) wire mesh was attached, the sample was placed on the wire mesh, and water was poured until the sample was sufficiently immersed in water. While gently stirring the water with a stirrer, the time until the sample collapsed was measured. It was determined that the shorter the disintegration time, the better the disintegration property.

[Solubility Test] In the disintegration test, the sample was immersed in water, the active chlorine concentration in the water after 30 minutes was measured, and the dissolution rate (%) of the sample was determined from the measured value. . It was determined that the higher the dissolution rate, the more excellent the rapid solubility.

[Storage Stability Test] One tablet sample was placed in a 1-liter plastic container, and allowed to stand in a thermo-hygrostat set at a relative humidity of 75% and a temperature of 40 ° C. for 1 day, 4 days, and 7 days.
The chlorine gas concentration (ppm) in the space inside the plastic container was measured with a gas detector tube (made by Gastec). It was determined that the lower the chlorine concentration, the better the storage stability.

[Examples 1 to 3 and Comparative Examples 1 and 2] Trichloroisocyanuric acid, sodium dichloroisocyanurate, calcium salt of carboxymethyl cellulose and magnesium sulfate in the proportions (parts by weight) shown in Table 1, respectively.
, And after mixing them, granulator (48 mm width biaxial roll, roll pocket size: diameter 9 mm, depth 4
mm, rotation speed 32 rpm) and weight about 500 mg
A briquette-shaped molded product was prepared. A disintegration test and a solubility test were carried out on the obtained molded product. The test results obtained are shown in Table 1.

[0019]

[Table 1]

According to the test results shown in Table 1, the molded articles prepared in the Examples have a short disintegration time when soaked in water, which is within 1 minute, and have excellent disintegration property. The dissolution rate after the minute immersion is almost 100%, and it is recognized that the dissolution rate is excellent.

[Examples 4 to 5 and Comparative Examples 3 to 4] Trichloroisocyanuric acid, sodium dichloroisocyanurate, calcium salt of carboxymethyl cellulose and magnesium sulfate were mixed in the proportions (parts by weight) shown in Table 2, respectively. Pressure 700-80 for 500 mg of composition
Tablets with a diameter of 10 mm were prepared with a pressing pressure of 0 kg / cm ² . When a storage stability test was conducted on the obtained tablets, the test results were as shown in Table 2.

[0022]

[Table 2]

From the test results shown in Table 2, it was confirmed that the addition of magnesium sulfate suppresses the generation of chlorine as a decomposition gas.

[0024]

The fast-dissolving chlorinated isocyanuric acid molded product of the present invention is excellent in disintegrating property when contacted with water.
It has a high dissolution rate in water, and is suitable for applications such as super chlorination of pool water in which a high concentration of active chlorine must be rapidly supplied. Further, generation of chlorine gas due to decomposition of the molded product during storage is suppressed, and storage stability is excellent.

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Claims (5)

[Claims] 1. A fast-dissolving chlorinated isocyanuric acid molded product, which is obtained by pressure-molding a composition containing trichloroisocyanuric acid, sodium dichloroisocyanuric acid sodium, and a calcium salt of carboxymethyl cellulose. 2. A rapid-dissolving composition comprising a composition in which 10 to 50 parts by weight of trichloroisocyanuric acid, 40 to 90 parts by weight of sodium dichloroisocyanurate and 1 to 10 parts by weight of a calcium salt of carboxymethyl cellulose are mixed and molded under pressure. Chlorinated isocyanuric acid moldings. 3. A fast-dissolving chlorinated isocyanuric acid molded product obtained by pressure-molding a composition containing trichloroisocyanuric acid, sodium dichloroisocyanuric acid, calcium salt of carboxymethyl cellulose and magnesium sulfate. 4. 10 to 50 parts by weight of trichloroisocyanuric acid, 40 to 90 parts by weight of sodium dichloroisocyanurate, and 1 to 1 of calcium salt of carboxymethyl cellulose.
A fast-dissolving chlorinated isocyanuric acid molded product obtained by pressure molding a composition containing 10 parts by weight and 1 to 10 parts by weight of magnesium sulfate. 5. The particle size of trichloroisocyanuric acid is 4
The proportion of particles having a size of 00 μm or less and 75 μm or less is 70 to 90% by weight, and the particle diameter of sodium dichloroisocyanurate is 600 μm or less, and 150
The rapidly soluble chlorinated isocyanuric acid molded product according to any one of claims 1 to 4, wherein the proportion of particles in the range of ˜450 μm is 90% by weight or more.