JPH0693290A - Agent for preventing adhesion of scale and method therefor - Google Patents

Abstract

PURPOSE:To provide an agent preventing the adhesion of scales to toilet stools, etc., and masking malodors caused by urination, by molding a composition comprising sulfamic acid powder, perfume-containing carrier powder, and a volatile and oleophilic substance. CONSTITUTION:The preventive agent is characterized by molding a composition comprising (A) 100 pts.wt. of sulfamic acid powder. (B) 0.1-200 pts.wt. of perfume-containing carrier powder, and (C) a volatile and oleophilic substance (preferably polysiloxane or triisopropyl-S-trioxane) in an amount sufficient for preventing the direct contact of the particle surfaces of the component A to the particle surfaces of the component B. The perfume constituting the component B is preferably a liquid perfume, and the carrier is preferably a water-soluble carrier. such as (cyclo)dextrin, having an oil-absorbing ability and having a particle size of <=42 mesh.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scale adhesion preventive agent which can prevent the scale from adhering to the wall surfaces of toilet bowls, pipes and the like which are in contact with urine, and can mask unpleasant odor caused by urine and urine decomposition products.

[0002]

2. Description of the Related Art A scale caused by urine contains a main component of a calcium-containing inorganic compound based on the decomposition of urine alone or diluted with washing water and an organic compound, and is usually called urinary stone. It has long been well known that sulfamic acid not only dissolves scale well, but can also prevent scale formation by dissolving sulfamic acid in water containing scale components such as calcium ions. In addition, while sulfamic acid is a strong acid almost equivalent to hydrochloric acid, sulfuric acid, etc., its corrosiveness to metals is
It is also known that it is much lower than those, and therefore, there are many proposals regarding a scale removing agent, a scale anti-sticking agent and the like containing sulfamic acid.

For example, Japanese Patent Publication No. 3-60359 proposes a spherical molded article containing sulfamic acid or a chelating agent and paradichlorobenzene. JP-A-2-147699 proposes a disk-shaped molded product containing an organic carboxylic acid, cyanuric acid, metaphosphoric acid, boric acid or a mixture thereof and a perfume.

As a method of microencapsulating or coating a drug for the purpose of improving drug stability and controlling elution, for example, in JP-A-61-16373, an organic acid may be coated with polyethylene glycol. Proposed.

[0005]

The scale called urinary stone is apt to be generated from the vicinity of the outlet of the urinal of the men's toilet where the diameter of the drainage pipe is relatively small, to the vicinity of the inlet of the pipe. It also causes a passage blockage. Therefore, the scale removal work is usually performed at intervals of about 1 to 2 years. However, this scale removal work is not only troublesome in itself, but in order to give the operator an unsanitary feeling, instead of this, it is desired to provide a urinary stone adhesion preventive agent that does not cause the scale itself to be generated. There is.

The above-mentioned spherical molded article containing sulfamic acid or a chelating agent and paradichlorobenzene has an excellent effect of preventing scale adhesion and can remove ammonia in urine or its decomposition products, but it is caused by organic substances. It is not effective for removing or masking unpleasant odors. The above-mentioned cited disk-shaped molded product containing an organic carboxylic acid, cyanuric acid, metaphosphoric acid, boric acid or a mixture thereof and a fragrance is excellent in masking an unpleasant odor. Calcium salts such as acids, cyanuric acid, metaphosphoric acid, and boric acid have very low solubility in water, and therefore may cause scale formation.

A molded product of a mixture of sulfamic acid and a fragrance has poor stability because the fragrance is gradually decomposed by the sulfamic acid during storage. Molded bodies from a mixture of sulfamic acid and perfume coated with the polyethylene glycols cited above show improved storage stability, but in practical use the coating film is hydrophilic and therefore the sulfamine An aqueous solution of acid passes through this film and contacts the fragrance, gradually causing decomposition of the fragrance.

When coated with a non-volatile lipophilic polymer such as polyethylene, polyvinyl acetate, paraffin wax, etc., the stability of the perfume during storage and use is good, but the coating agent is water. Since it is insoluble, it has drawbacks such that sulfamic acid and the fragrance are left after they are gone, or they adhere to the wall surfaces of toilet bowls, pipes, etc. and cause scales.

The present invention prevents the adhesion of scales to the wall surfaces of toilet bowls, pipes, etc. that come in contact with urine, and further imparts the masking property of unpleasant odors caused by urine and urine decomposition products with good storage stability to prevent the adhesion of aromatic scales. It is intended to provide an agent.

[0010]

The scale adhesion preventive agent of the present invention comprises 100 parts by weight of a sulfamic acid powder, 0.1 to 200 parts by weight of a perfume-containing carrier powder, particle surfaces of the sulfamic acid powder and a perfume-containing carrier powder. It is obtained by molding a composition obtained by mixing with a substance having a volatility and lipophilicity in an amount sufficient to prevent direct contact with the particle surface.

By installing this molded body in a urinal of a men's toilet, in a trap of a urinal of a men's toilet, in a high tank of a men's toilet, or in a washing water pipe, it is possible to preferably prevent adhesion of scale. . The sulfamic acid used in the present invention may be powder if it is 4
A particle size of 2 mesh or less is preferable.

The fragrance used in the present invention is not particularly limited, but is preferably liquid, for example, rose,
Examples include natural and synthetic blended fragrances such as flower fragrances such as gardenia and quince, fragrances of fruits such as citrus and peach, and scents of trees such as cypress and mint. Examples of liquid perfume carriers include magnesium sulfate, silicates such as calcium silicate, silica gel, colloidal silica, alumina, zeolite, clay minerals such as bentonite, crystalline cellulose, cellulose derivatives such as carboxymethyl cellulose salt and hydroxypropyl cellulose, Examples thereof include gums such as gum arabic and guar gum, starch and its derivatives, powders of dextrin, cyclodextrin, agar, gelatin and the like, and those having a particle size of 42 mesh or less are preferable. Further, the carrier powder is preferably one having a large oil absorption capacity such as calcium silicate, silica gel, dextrin, cyclodextrin, etc., and more preferably dissolved in water such as dextrin, cyclodextrin.

The mixing ratio of the carrier powder and the perfume is about 10 to 500 parts by weight of the perfume with respect to 100 parts by weight of the carrier powder, but 20 to 200 parts by weight is particularly preferable. The amount of the fragrance-containing carrier added may be about 0.1 to 200 parts by weight with respect to 100 parts by weight of sulfamic acid, and particularly, 0.1.
5 to 100 parts by weight is preferable. Examples of the volatile and lipophilic substance used in the present invention include naphthalene, paradichlorobenzene, camphor, adamantane and its derivatives, norbornene and its derivatives, tricyclo [5,2,1,0 ^2,6 ] decane. , Cyclododecane, triisopropyl-S-trioxane, tritert-butyl-S-trioxane, 2,2,3-trimethylbicyclo [2,2,1] heptane, 3a, 4,4a, 5.
8,8a, 9,9a-Octahydro-4,9,8-dimethano-benz [f] indene, endo-trimethylnorbornane, dimethyl fumarate, tetramethylcyclobutane-1,3-dione, the following general formula [1]

[0014]

[Chemical 1]

(In the formula, n represents an integer of 0 to 10 and R ₁
To R ₈ are the same or different and be in good a methyl group, an ethyl group, and a phenyl group. ), A linear polysiloxane represented by the following general formula [2]

[0016]

[Chemical 2]

(In the formula, m represents an integer of 2 to 8, and R ₉ to
R _{12 s} may be the same or different and each represents a methyl group, an ethyl group or a phenyl group. Examples of the cyclic polysiloxane represented by the formula (4) and the like are preferable, and in particular, odorless ones such as the polysiloxane represented by the above formula, triisopropyl-S-trioxane, and tritert-butyl-S-trioxane are preferable.

The composition used for molding the scale inhibitor of the present invention contains the above-mentioned sulfamic acid powder, the perfume-containing carrier powder, and the above-mentioned volatile and lipophilic substances. The amount of the composition of the volatile and lipophilic substance in the composition, when the composition is molded, the surface of the sulfamic acid particles and the surface of the perfume-containing carrier particles in the molded article obtained. The amount may be such that there is no direct contact with. This composition is preferably
It is prepared by thoroughly mixing the sulfamic acid powder, the flavor-containing carrier powder, and the volatile and lipophilic substance. The amount of the volatile and lipophilic substance used in this mixing is such that the surface of the sulfamic acid particles and the surface of the perfume-containing carrier particles are completely covered with the volatile and lipophilic substance by this mixing. An amount greater than the amount is preferred, and an amount less than the amount that fills the particles and voids of the particles produced by this molding is preferred.

The amount of the volatile and lipophilic substance used in this mixing is determined by the kind of the carrier powder, the particle size distribution of sulfamic acid and the powder carrier, its surface area, the crushability of the powder during molding, Although it may vary depending on the viscosity of the volatile and lipophilic substances, etc., the preferred amount can usually be easily known by testing the stability of the molded product of the mixture. For example, from 60 mesh to 15
100 parts by weight of sulfamic acid in the range of 0 mesh, and 6
Cyclodextrin 6 from 0 mesh to 200 mesh
When tetradecamethylhexasiloxane is mixed with 0 parts by weight and carrier powder consisting of 20 parts by weight of mint-based fragrance, tetradecamethylhexasiloxane is 0.1 to 0.1 parts by weight.
20 parts by weight are mixed.

A composition can also be obtained by simultaneously adding the sulfamic acid powder, the flavor-containing carrier powder, and the volatile and lipophilic substance into a container and mixing them, but the sulfamic acid powder and the volatile substance are mixed. And a substance having lipophilicity are mixed in advance with a flavor-containing carrier powder, or a mixture of the flavor-containing carrier powder and the substance having volatile and lipophilicity is mixed with sulfamic acid powder. By doing so, or by further mixing these sulfamic acid powder mixed with the volatile and lipophilic substance and the flavor-containing carrier powder, the composition used for the molding can be obtained.
Particularly preferred is the composition obtained by mixing these sulfamic acid powders mixed with the volatile and lipophilic substances and the perfume-containing carrier powders.

In addition to the above components, various additives such as a filler, a melt casting aid, a surfactant, a colorant, a dissolution rate modifier, a binder, and a corrosion inhibitor may be added to the composition before molding. , Components such as sterilizing agents, lubricants, etc. may be added,
These components are premixed with a sulfamic acid powder, a flavor-containing carrier powder and a substance having volatile and lipophilic properties,
Mixing is preferred.

As a method for molding the composition, a method of press-molding a powder mixture of the above-mentioned respective components, a method of granulating the powder mixture by a method such as extrusion granulation method, and then press-molding,
Examples thereof include a method in which the powder mixture is heated and melted, cast, and molded. The shape of the molded body may be any shape such as a spherical shape, a disk shape, a conical shape, and a perforated disk shape.

[0023]

The molded product of the scale preventive agent of the present invention is obtained as described above. Probably during the molding, the surface of the particles of the sulfamic acid powder and the surface of the particles of the perfume-containing carrier powder are volatilized. In order to bond via a substance having oleophilicity and lipophilicity, that is, the surface of particles of sulfamic acid powder and the surface of particles of perfume-containing carrier powder are bonded as particles coated with a substance having volatile and lipophilicity. Therefore, direct contact between sulfamic acid and the fragrance is suppressed,
Further, even when this molded product comes into contact with water, direct contact between the aqueous solution of sulfamic acid and the fragrance caused by this contact is suppressed, so that the stability of the fragrance is improved during storage and use. it is conceivable that.

When the carrier powder and the fragrance are blended, if the fragrance is too much, the mixture becomes a paste, and bleeding of the fragrance occurs from the molded body at the time of molding. Conversely, if too little fragrance is contained in the molded body. The amount of fragrance is insufficient, resulting in poor masking performance. Even if the ratio of the fragrance-containing carrier powder is too small, the masking performance becomes insufficient, and conversely if the ratio is too large, the odor of the fragrance is too strong, which is not preferable, and sulfamic acid, which is a scale adhesion preventing component in the molded body, is not preferable. Ratio decreases, and the scale adhesion prevention performance becomes poor.

The volatile and lipophilic substance not only acts as a coating agent for forming a lipophilic film by intervening between the sulfamic acid particles and the particles of the perfume-containing carrier powder, but also has a volatility. It does not remain after the sulfamic acid and the fragrance have disappeared, and does not adhere to the toilet bowl, piping, etc. If the amount of the volatile and lipophilic substance used is too large, bleeding out of the molded body during the production of the molded body may result in deterioration of the moldability.

[0026]

【Example】

[0027]

Example 1 25 g of sulfamic acid of 60 mesh to 150 mesh and 5 g of mixed fragrance were mixed from 60 mesh to 2 mesh.
A mixture of the perfume-containing carrier powder obtained by mixing with 15 g of 00 mesh cyclodextrin and tetradecamethylhexasiloxane (A) in the amount shown in Table 1 was pressure-molded, and the diameter was 35 mm and the weight was 45- 50 g of disk-shaped compacts No. 1 to 14 were obtained.

The molded product was kept at 70 ° C. for 1 week, and a change in odor was tested by a sensory test. Table 1 shows those with no change in odor as ◯ and those with change in odor as x. Table 1 Amount of molded product number (A) added (g) Perfume test result used 1 5 Mint type 0 2 1 Mint type 0 3 0.5 Mint type 0 4 0.05 Mint type 0 5 0.005 Mint type × 6 None Mint type × 7 1 Peach type 〇 8 None Peach type × 9 1 Citrus type 〇 10 None Citrus type × 11 1 Rose type 〇 12 None Rose type 〇 13 1 Gardenia type 〇 14 None Gardenia type × As shown in Table 1 Molded bodies No. 1 to 4, 7, 9, 11,
No. 13 was good with no odor change in the abuse test at 70 ° C. for 1 week.

By using 0.1 to 10 parts by weight of tetradecamethylhexasiloxane for 100 parts by weight of the total of sulfamic acid and the fragrance-containing carrier, it is possible to obtain a scale adhesion preventive agent having good storage stability. It shows that you can do it.

[0030]

Example 2 A perfume-containing carrier obtained by mixing 20 g of sulfamic acid of 60 mesh to 150 mesh, 5 g of mint-based perfume and 15 g of cyclodextrin of 60 mesh to 200 mesh, and the amount of the ingredients shown in Table 2. A mixture with tetradecamethylhexasiloxane (A) was pressure-molded to obtain a disk-shaped molded body No. 15 to 20 having a diameter of 35 mm and a weight of 45 to 50 g.

This molded product was placed in a urinal of a men's toilet that emits a foul odor, and tests were conducted for the effect of preventing scale adhesion and the masking performance for unpleasant odor. Regarding the effect of preventing scale adhesion, the pipes were visually observed, and those without scale adhesion were rated as ◯, and those where scale adhesion was recognized were rated as x. The masking performance test was carried out by a sensory test, and it was rated as “No” when unpleasant odor was felt and “No” when unpleasant odor was not felt. The test results are shown in Table 2.

Table 2 Amount of molded product number (A) added (g) Scale adhesion prevention masking 15 5 〇 〇 16 1 1 〇 〇 17 0.5 0.5 〇 〇 18 0.05 0.05 〇 〇 19 0.005 〇 × 20 None 〇 × Table 2 As shown, when sulfamic acid was used, the effect of preventing scale adhesion was all good, but the molded products Nos. 19 and 20 had an insufficient odor masking effect due to a change in odor during use. there were.

[0033]

EFFECTS OF THE INVENTION The scale adhesion preventive agent of the present invention can prevent the adhesion of scales and mask unpleasant odors simply by installing it in a urinal of a men's toilet, as shown in the above examples. .

Claims (2)

[Claims] 1. Sulfamic acid powder 100 parts by weight, perfume-containing carrier powder 0.1 to 200 parts by weight, and an amount sufficient to prevent direct contact between the particle surface of this sulfamic acid powder and the particle surface of perfume-containing carrier powder. A scale anti-adhesion agent obtained by molding a composition obtained by mixing with a substance having volatile and lipophilic properties. 2. The scale adhesion preventive agent according to claim 1 is installed in a urinal of a men's toilet, a trap of a urinal of a men's toilet, a high tank of a men's toilet, or a flush water pipe. And a method for preventing scale from adhering to these urinals or their traps.