JP2754740B2 - Scale remover - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a solid drug used for removing scale formed on a wall surface of a urinal for a man and a water distribution pipe.

(Prior Art) The scale derived from urine mainly contains an inorganic compound mainly derived from calcium contained in urine as a main component, and these are generally called uroliths.

The scale called urine stone is particularly easily generated in drain pipes and urinals, and if it accumulates, it causes odor generation and block drain passages. For this reason, this urinary stone removal operation is usually performed at intervals of one to two years. In order to remove the urolith, a method is generally performed by bringing a drug that dissolves the urolith into contact with the urolith, and it is desired to provide an improved drug used for the method.

It is well known that strong acids such as hydrochloric acid are effective for dissolving urine stone. In particular, sulfamic acid is a strong acid comparable to sulfuric acid, hydrochloric acid and the like, but has much lower corrosiveness to metals than that of sulfuric acid and hydrochloric acid. Therefore, there are many proposals to use sulfamic acid as a urolith remover.

For example, Japanese Patent Application Laid-Open No. Sho 63-205400 discloses an example of a press-formed product of a mixture comprising 50 parts by weight of sulfamic acid, 50 parts by weight of boric acid, 1 part by weight of calcium stearate and 1 part by weight of a corrosion inhibitor. ing.

(Problem to be Solved by the Invention) Although the uric acid dissolving power of hydrochloric acid is excellent, hydrochloric acid easily corrodes the metal material of piping, and requires special care in handling, and has a practical difficulty. Solid sulfamic acid is
It is used as an aqueous solution because it does not dissolve urine stones as it is, but if you prepare this aqueous solution in advance,
As the hydrolysis of sulfamic acid proceeds during its storage, the aqueous solution undergoes alteration. Also effective is a method of dissolving powdery and granular sulfamic acid, which is usually supplied as an industrial product, in water immediately before use and using it as an aqueous solution, but not only requires time for dissolution, but also requires tools for it. It is not a simple method. Further, a method of adding sulfamic acid powder to washing water which is discharged every time the toilet is used may be used, but this washing water is usually 2 to 4 times.
Since the entire amount is discharged within about a minute, the added sulfamic acid powder is flushed with the washing water without being sufficiently dissolved, and such a method is not efficient.

According to the description in JP-A-63-205400, tableting is performed after mixing sulfamic acid, boric acid, calcium stearate and a corrosion inhibitor. The defects described in the publication, the strength of the molded article is insufficient, or the molded article is disintegrated in water when it comes into contact with water, and the dissolution rate in water is insufficient. It is difficult to obtain a compact. For example, if an obstacle called sticking occurs during molding, a small lump of powder adheres to the kinematics of a tableting machine, causing recesses on the surface of the molded product, resulting in defective molded products and continuous tableting. Make it impossible. Further, when an obstacle called capping occurs during molding, cracks occur in the molded article, and in an obstacle called lamination, layered cracks occur on the surface of the molded article. If the molded article disintegrates in the wash water, the lumps produced by the disintegration are flushed with the water without dissolving in the wash water, resulting in the loss of the drug and the dissolution rate in the water being insufficient. Is not effective in removing urine stones. In particular, when the appearance of the molded product is defective or the strength is insufficient, the product is not suitable for commercial use.

In a normal men's flush urinal, a trap structure is provided in a part of the way from a drain port to a drain pipe. In this trap portion, about 1 to 4 washing water always stays, and the water in the trap portion stops the flow of the malodor that goes up through the conduit. Usually, the frequency of using the toilet is about once every 10 to 30 minutes, so a solid urinary stone remover is installed in the above trap, and within this time an effective amount of sulfamic acid is dissolved in the trapped water in the trap. And urine stones are mixed with this aqueous solution of sulfamic acid for 1-2 minutes.
During the day, it is desired to dissolve it completely or to the extent that the flow of washing water is good.

The present invention, as a solid urinary stone remover containing sulfamic acid as the main agent, without having the above product defects,
It is an object of the present invention to provide a solid medicine capable of removing urine stones efficiently in one to two days with an appropriate water dissolution rate when installed in the trap.

SUMMARY OF THE INVENTION An improved descaling agent according to the present invention has a size of less than 16 mesh but greater than 200 mesh, preferably 100 mesh.
100 parts by weight of the sulfamic acid powder having a particle size larger than the mesh, and a particle size smaller than the particle size of the sulfamic acid powder used, preferably 10 to 80 parts by weight of the orthoboric acid powder having a particle size smaller than 60 mesh but larger than 250 mesh, preferably 200-600kg / c of mixed powder consisting of 20-70 parts by weight
obtained by molding at a molding pressure of m ^2.

The sulfamic acid and orthoboric acid used in the present invention may be commercially available industrial products. As the powder, those obtained by crushing and sieving to the above particle sizes, respectively, are used. This pulverization can be easily carried out by using a usual pulverizer, for example, a hammer mill or the like, and sieving can be easily carried out by a usual method.

The mixed powder used in the present invention can be easily obtained by sufficiently mixing the sized sulfamic acid powder and orthoboric acid in the above-mentioned ratio using a usual mixer. The mixed powder may contain a small amount of an auxiliary agent, for example, stearic acid, a salt thereof, talc, etc. as a release agent in an amount of 0.2 to 1% by weight based on the sulfamic acid powder. 0.03 to sulfamic acid
0.3% by weight may be contained.

The descaling agent of the present invention is molded by molding using a conventional pressure molding machine, for example, a tableting machine at the above molding pressure. Although the shape of the molded article is not particularly limited, for example, a molded article having a through-hole such as a donut is preferable, and the size is preferably about 10 to 50 g per piece.

(Operation) The fact that the preferred scale inhibitor is obtained by the present invention depends on the particle size of the sulfamic acid powder and orthoboric acid used in the molding, the blending ratio of these powders and the molding pressure.

If the sulfamic acid particles used are too fine, the above-mentioned obstacles such as capping and sticking are likely to occur during the molding of the mixed powder, and the particle size must be 200 mesh or more, preferably 100 mesh or more. However, if the particle size is larger than 16 mesh, the obtained molded body is liable to be peeled off from its surface in water and to be broken. If the particles of orthoboric acid used are larger than the particles of sulfamic acid, the molded body of the mixed powder will have poor uniform solubility, and the mixed powder will not exhibit favorable fluidity, mold release properties, etc. even during molding. In addition, the above-mentioned tableting trouble is likely to occur. The finer the particle size of the orthoboric acid, the better the moldability of the mixed powder. However, since it takes a long time for pulverization and a large amount of energy to obtain fine particles of orthoboric acid, it is preferably 250 mesh or more.

In the mixed powder used, when the amount of the orthoboric acid powder is 10% by weight or less based on the sulfamic acid powder, the compact of the mixed powder is easily disintegrated in water in a short time, preferably 20% by weight. % Or more is required. However, when the amount of orthoboric acid is as much as 80% by weight or more with respect to the sulfamic acid powder, the press-formed body obtained from the mixed powder tends to lack the ability to dissolve urine stone in a short time, and % By weight or less is preferred.

The pressure applied during the molding of the mixed powder should be as low as possible to avoid wear of the molding machine.
If the g / cm ² or less, the strength of the obtained molded body is not sufficient,
Preferably, it is 200 kg / cm ² or more. But at most 800
Pressures above kg / cm ² should be avoided. Appropriate pressure for preferably forming a molded body having sufficient strength is 200 to 600 kg / cm ²
It is.

(Example) Example 1 and Comparative Example 1 Granulated sulfamic acid of an industrial product was ground by a hammer mill and then sieved to obtain a sulfamic acid powder (a) having a particle size larger than 16 mesh and 150 mesh although smaller than 16 mesh. A larger particle size sulfamic acid powder (b) was obtained.

Further, by pulverizing and sieving the industrial granular orthoboric acid in the same manner as described above, the orthoboric acid powder having a particle size larger than 16 mesh (A) and the orthoboric acid powder having a particle size smaller than 60 mesh but larger than 200 mesh (B) are obtained. I got

Then, a commercially available talc powder was used as a molding aid, a V-type mixer was used for mixing the powder, and a tableting machine was used for molding the obtained mixed powder. 20g
The donut-shaped tablet T ₁ through T ₁₂ were molded at a molding pressure according Dohyo. The addition amount of talc was constant at 2% by weight based on the sulfamic acid. Tablets T ₁ through T ₃ according to the table are examples of the present invention, T ₄ through T ₁₂ are comparative examples. Strength of moldability and the obtained molded body at the time of molding the tablets of the T ₁ through T ₁₂ are shown in the table. When the tablet was dropped on a concrete floor from a height of 50 cm, the strength was determined to be insufficient if the tablet was broken or missing, and the one without abnormality was determined to be good.

According to the results described above, the tablets of Examples of the present invention had sufficient strength without any defects in appearance and were molded with good moldability. The tablet of Comparative Example, other T _7, T ₁₀ and T ₁₂ indicates poor moldability, the insufficient strength or the like.

After tied off the 4箇of Example 2 and Comparative Example 2 The tablets T ₁ made of polyethylene string through the holes, which as tablets are placed in a urinal trap unattached scale After hanging, wash water with a drainage amount of 10 once every 10 minutes,
After 3 hours, the weight was measured, and the weight loss was 24 g.

Next, when the same solubility test was performed on the tablets T _{2 to} T ₁₂ as described above, the tablets T ₄ and T _{6 to} T
All ₁₁ had collapsed and had fallen off the polyethylene string. T of Comparative Example ₅ had occurred the shape collapse due to peeling from the surface. Weight loss of the tablet T ₂ in 28g of Example, and a reduction of T ₃ in 31 g. On the other hand, the tablet T _{12 of the} comparative example
It is a weight loss of 13 g, and compared with the tablets T _{1 to} T _{3 of the} examples,
The solubility was reduced.

Example 3 and Comparative Example 3 Granular sulfamic acid of an industrial product was pulverized with a hammer mill and then sieved to obtain a product having a particle size smaller than 16 mesh.
A sulfamic acid powder (c) having a particle size larger than 0 mesh, a sulfamic acid powder (d) having a particle size smaller than 100 mesh but larger than 150 mesh, and a sulfamic acid powder (e) having a particle size smaller than 150 mesh were obtained.

Also, by pulverizing and sieving industrial granular orthoboric acid in the same manner as above, orthoboric acid powder (B) having a particle size smaller than 60 mesh but larger than 200 mesh, and orthoboric acid having a particle size smaller than 115 mesh but larger than 200 mesh. A powder (C) and an orthoboric acid powder (D) having a particle size smaller than 200 mesh were obtained.

Then, a commercially available talc powder was used as a molding aid, a V-shaped mixer was used for mixing the powder, and a tableting machine was used for molding the obtained mixed powder. 20g
The donut-shaped tablet T ₂₁ through T ₂₄ were molded at a molding pressure according Dohyo. The addition amount of talc was constant at 2% by weight based on the sulfamic acid. Tablets T ₂₁ and T ₂₃ according to the table are examples of the present invention. T ₂₂ is a comparative example of T _21, T ₂₄ is T ₂₃
This is a comparative example. Strength of moldability and the obtained molded body at the time of molding the tablets of the T ₂₁ through T ₂₄ are shown in the table.
When the tablet was dropped on a concrete floor from a height of 50 cm, the strength was determined to be insufficient if the tablet was broken or missing, and the one without abnormality was determined to be good.

According to the results described above, the tablets of Examples of the present invention had sufficient strength without any defects in appearance and were molded with good moldability. And the tablet of the comparative example shows insufficient strength.

Was repeated except solubility test as described in Example 4 and Comparative Example 4 Example 2 and Comparative Example 2, tablets T ₂₂ and T ₂₄ of the comparative example before flowing the second effluent of 10 in solubility test It collapsed and fell off the polyethylene string. Reduction of 29g in the tablets T ₂₁ embodiment, and a reduction of the T ₂₃ 24 g.

Example 5 A trap portion was removed from a urinal that had not been subjected to urine stone removal work for many years, and the state of adhesion of urine stone was examined.
Urinary stone of approximately 5 mm thickness was adhered to the inner wall of the tube having an inner diameter of 50 mm. After applying takes this trap again restored, tied off at polyethylene cord four of the tablets T ₂ through the holes, after hung as tablets are placed in the trap unit, every 10 of 15 minutes The flow of water was repeated, and the thickness of the urine stone was measured 5 hours later and found to be 2 mm. And the weight loss of the tablets was 25 g. This test shows that urinary stones are dissolved and removed in a very short time.

Comparative Example 5 A trap portion was removed from a urinal having the same specifications as those used in Example 5, which had not been subjected to urine stone removal work for many years.
Examination of the state of urinary stone adhesion revealed that urine stone with a thickness of approximately 4 mm adhered to the inner wall of the tube having an inner diameter of 50 mm. After applying takes this trap again restored, tied off at polyethylene cord 4箇of the tablet T ₁₂ through the holes, after hung as tablets are placed in the trap section, every 15 minutes 10
Was repeated, and the thickness of the urine stone was measured 5 hours later to be 3.5 mm. And the weight loss of tablets is 12 g
Met. This test shows that the ability to dissolve and remove the tablet T ₁₂ is compared to the tablet T ₂ in a short time urine stone is missing.

(Effect of the Invention) The solid descaling agent of the present invention has no defect in appearance, has sufficient strength, and does not collapse during handling during transportation and use.

In addition, when this solid scale remover is injected into a male urinal, it completely dissolves and dissolves in about one day, and almost no scale adheres in the toilet after disappearance. It is possible to obtain almost the same scale removing effect as the case where scale is removed using the hydrochloric acid base agent.

In addition, this descaling agent can be easily and efficiently manufactured by pressure molding.

Claims (1)

(57) [Claims] A mixed powder comprising 100 parts by weight of a sulfamic acid powder having a particle size smaller than 16 mesh but larger than 200 mesh and 10 to 80 parts by weight of an orthoboric acid powder having a particle size smaller than the particle size of the sulfamic acid powder. ~ 600kg
A scale remover molded at a pressure of / cm ² .