TW202000814A - Coating material for toilet bowl - Google Patents

Abstract

An object of the present invention is to provide a coating agent for toilet toilets that can impart an excellent antifouling effect to the surface of toilet toilets. By using a betaine group-containing hydrophilic polymer containing a betaine group-based monomer as a repeating unit and having a silanol group at one end to coat the toilet bowl, exceptionally excellent antifouling against fecal dirt can be imparted effect.

Description

Coating agent for toilet

The present invention relates to a coating agent for toilet toilets that can impart an excellent antifouling effect to the surface of toilet toilets.

In homes and commercial facilities, maintaining the sanitary condition of the toilet is not only to maintain the health of the residents or users, but also to live comfortably and happily. Previously, as one of the products that made toilets hygienic, toilet cleaners were developed and used. However, the cleaning agent for toilets has a limit in the effect of making it difficult to attach fecal dirt (antifouling effect) to the surface of the toilet bowl. Therefore, it has been previously studied to impart antifouling effect by coating the surface of the toilet bowl.

Previously, as a method of imparting an antifouling effect to hard surfaces such as metals, glass, and ceramics, water repellent treatment and hydrophilization treatment have been known.

The water repellent treatment imparts water repellency to the hard surface, which can repel dirt containing moisture and thereby make it difficult to adhere. This type of water repellent treatment is widely used in clothing, painted surfaces of automobiles, etc., and the use of water repellent treatment for toilet bowls is also being studied. For example, Patent Document 1 discloses that by using a fluorine-based amphiphilic substance, the toilet bowl can be treated with water.

On the other hand, the hydrophilization treatment reduces the contact angle of the hard surface with water by imparting hydrophilicity to the hard surface, making it easy for dirt containing water to flow and thereby making it difficult to adhere. Such hydrophilization treatment is widely used for anti-fog or antistatic of glass or mirrors, etc., and the use of hydrophilization treatment for toilet toilets is also being studied. For example, Patent Document 2 discloses that by using a specific alkylene oxide adduct of acetylene glycol, the toilet bowl can be hydrophilized.

However, intestinal bacteria, oily substances, hydrophilic substances, etc. are mixed in the feces, which is significantly different from the composition of other dirt. Therefore, the previous water repellent treatment or hydrophilic treatment of the general hard surface on the feces of toilet toilets The anti-fouling effect of dirt is not sufficient. Moreover, although it is disclosed in Patent Document 1 and Patent Document 2 that the surface treatment of the toilet bowl can provide an antifouling effect, in order to follow the increase in consumer demand, it is desired to develop a treatment agent with an improved antifouling effect. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2000-144177 [Patent Document 2] Japanese Patent Laid-Open No. 2006-307148

[Problems to be solved by the invention] An object of the present invention is to provide a coating agent for toilet toilets that can impart an excellent antifouling effect to the surface of toilet toilets. [Means to solve the problem]

In order to solve the above-mentioned problems, the present inventors have conducted active research and found that by using a betaine group-containing monomer as a repeating unit and a betaine group-containing hydrophilic polymer having a silanol group at one end The toilet bowl is coated to give a particularly excellent antifouling effect on fecal dirt. The present invention was completed based on the findings and further research.

That is, the present invention provides the inventions disclosed below. Item 1. A coating agent for toilets, containing a betaine group-containing hydrophilic polymer containing a monomer having a betaine group as a repeating unit and having a silanol group at one end. Item 2. A method for coating a toilet bowl, such that a coating agent containing a betaine group-containing hydrophilic polymer containing a monomer having a betaine group as a repeating unit and having a silanol group at one end is in contact with the surface of the toilet bowl . Item 3. A use in which a composition including a hydrophilic polymer containing betaine groups is used as a coating agent for toilets. The hydrophilic polymer containing betaine groups contains a monomer having betaine groups as a repeating unit, and one The terminal has a silanol group. [Effect of invention]

According to the present invention, by coating the surface of the toilet bowl with a hydrophilic polymer containing a betaine group having a specific structure, an extremely excellent antifouling effect can be imparted to fecal dirt, so the toilet bowl can be maintained in a hygienic state .

1. Coating agent for toilet The coating agent for toilet bowls of the present invention is characterized by containing a betaine group-containing hydrophilic polymer containing a monomer having a betaine group as a repeating unit and having a silanol group at one end. Hereinafter, the coating agent for toilet bowls of the present invention will be described in detail.

[Hydrophilic polymer containing betaine group] In the coating agent for a toilet bowl of the present invention, as a component for coating the surface of the toilet bowl, a betaine group-containing hydrophilic group containing a monomer having a betaine group as a repeating unit and having a silanol group at one end is used Sexual polymer. When the hydrophilic polymer containing betaine group is in contact with the surface of the toilet bowl, it adheres to the surface of the toilet bowl through the silanol group and becomes a coated state, thereby providing exceptionally excellent antifouling against fecal dirt effect.

In the betaine group-containing hydrophilic polymer, the betaine group contained in the monomer may be a sulfobetain group, a carboxylbetain group, or a phosphorylbetain group. Either. In the present invention, the betaine group refers to a betaine residue from which one hydrogen atom has been removed from each betaine compound. The betaine group-containing hydrophilic polymer may have one betaine group or two or more betaine groups.

In the betaine group-containing hydrophilic polymer, the type of the monomer having a betaine group as a repeating unit is not particularly limited, and examples thereof include: N-(meth)acryloylaminoalkyl-N ,N-dimethylammonium alkyl-α-sulfobetaine, N-(meth)acryloyloxyalkyl-N,N-dimethylammonium alkyl-α-sulfobetaine, N, N-bis(meth)acryloyloxyalkyl-N-methylammonium alkyl-α-sulfobetaine, N,N,N-tri(meth)acryloyloxyalkylammonium alkyl- α-sulfobetaine, N-(meth)acryloyloxyalkyl-N,N-dimethylammonium α-carboxybetaine, N,N-bis(meth)acryloyloxyalkyl- N-methylammonium α-carboxybetaine, N,N,N-tri(meth)acryloxyalkylammonium α-carboxybetaine and other betaine-containing acrylic monomers. When these betaine group-containing acrylic monomers are included as a repeating unit of a betaine group-containing hydrophilic polymer, the betaine group-containing acrylic monomer may be copolymerized by radical polymerization.

Regarding the betaine group-containing hydrophilic polymer, the number of moles of the betaine group-containing monomer is not particularly limited. For example, it may be 2 or more, and may be about 2 to 10,000 or about 10 to 500.

In the hydrophilic polymer containing betaine group, the silanol group constituting one terminal may be a monosilanol group (Si(OH) ₁ ), a disilanol group (=Si(OH) ₂ ), and a trisilanol group (- Any one of Si(OH) ₃ ), but from the viewpoint of making the bonding to the toilet surface strong, preferably, a disilanol group or a trisilanol group is used, and more preferably, a trisilanol group is used.

As a preferable specific example of the betaine group-containing hydrophilic polymer, a compound represented by the following general formula (1) can be mentioned. [Chemical 1]

In general formula (1), n represents an integer of 1 to 3, preferably represents 2 or 3, and more preferably represents 3.

In the general formula (1), m is the number of repeating units of (R ² -R ³ ) and represents 2 or more, and may be about 2 to 10,000 or about 10 to 500. As m, about 100-1000 is preferable, about 300-500 is more preferable.

In the general formula (1), p is the number of methylene groups, and represents an integer of 0 to 10, preferably an integer of 1 to 5, and more preferably 3.

In general formula (1), R ¹ represents a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms (methyl, ethyl, propyl, butyl, etc.) or a lower alkoxy group having 1 to 5 carbon atoms (methyl Oxy, ethoxy, propoxy, butoxy, etc.).

In the general formula (1), R ² represents a C 1-4 alkylene group or a group shown in the following general formula (2a). [Chem 2]

In the general formula (2a), R ²¹ represents a hydrogen atom or a methyl group.

In the general formula (2a), R ²² represents an oxygen atom, -NH- group, or -NR ²²¹ -group (R ²²¹ represents an alkyl group having 1 to 4 carbon atoms). R ²² preferably includes an oxygen atom or a —NH— group.

In the general formula (2a), R ²³ represents a single bond, an alkylene group having 1 to 4 carbon atoms or an oxyalkylene group having 1 to 4 carbon atoms. R ²³ preferably includes an alkylene group having 1 to 4 carbon atoms, and more preferably an alkylene group having 2 or 3 carbon atoms.

In the general formula (1), when R ² is a group shown in the general formula (2a), R ²³ in the general formula (2a) has a structure bonded to R ³ .

In the general formula (1), R ³ represents a sulfobetaine group shown in the general formula (3a), a carboxybetaine group shown in the general formula (3b), or a general formula (3c) Phosphatidyl betaine base. R ³ preferably includes a sulfobetaine group represented by the general formula (3a) or a carboxybetaine group represented by the general formula (3b). [Chemical 3]

In the general formula (3a), R ³¹ and R ³² represent the same or differently a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, or a (meth)acryloyloxyalkyl group having 1 to 4 carbon atoms in the alkyl group base. R ³¹ and R ³² preferably include a C 1-4 alkyl group, and more preferably a methyl group.

In the general formula (3a), R ³³ represents an alkylene group having 1 to 4 carbon atoms or an oxyalkylene group having 1 to 4 carbon atoms. R ³³ preferably includes a C 1-4 alkylene group, more preferably a C 3 alkylene group.

In the general formula (3b), R ³⁴ and R ³⁵ represent the same or differently a hydrogen atom or a C 1-4 alkyl group. R ³⁴ and R ³⁵ preferably include a C 1-4 alkyl group, and more preferably a methyl group.

In the general formula (3b), R ³⁶ represents an alkylene group having 1 to 4 carbon atoms. R ³⁶ preferably includes an alkylene group having 1 or 2 carbon atoms, more preferably a methylene group.

In the general formula (3c), R ³⁷ represents an alkylene group having 1 to 4 carbon atoms.

In the general formula (3c), R ³⁸ , R ³⁹ and R ⁴⁰ represent the same or differently a hydrogen atom or a C 1-4 alkyl group.

In the general formula (1), R ⁴ represents a hydrogen atom or a C 1-4 alkyl group. R ⁴ preferably includes a hydrogen atom.

In general formula (1), X represents a sulfur atom, an oxygen atom, or a single bond. X preferably includes a sulfur atom.

As a preferred example of the betaine group-containing hydrophilic polymer, in the general formula (1), n is 3; m is about 300 to 500; p is 3; R ² is the general formula (2a ) And R ²¹ is a hydrogen atom, R ²² is a -NH- group, R ²³ is a C 3 alkylene group; R ³ is a sulfobetaine group shown in general formula (3a) and R ³¹ and R ³² are methyl groups, R ³³ is a C 3 alkylene group; R ⁴ is a hydrogen atom; X is a compound of sulfur atom.

In addition, as other preferred examples of the betaine group-containing hydrophilic polymer, in the general formula (1), n is 3; m is about 300 to 500; p is 3; R ² is the general The group shown in formula (2a) and R ²¹ is a methyl group, R ²² is an oxygen atom, R ²³ is a C 2 alkylene group; R ³ is a carboxy betaine group shown in general formula (3b) and R ³⁴ and R ³⁵ are methyl groups, R ³⁶ is a methylene group; R ⁴ is a hydrogen atom; X is a compound of sulfur atom.

The betaine group-containing hydrophilic polymer can be obtained by a known synthesis method. Furthermore, as the betaine group-containing hydrophilic polymer, for example, commercially available brand names "LAMBIC-771W", "LAMBIC-1000W", "LAMBIC-400EP" (Osaka Organic Chemical Industry Co., Ltd.), etc. In the invention, a commercially available product can be used as the betaine group-containing hydrophilic polymer.

The concentration of the betaine group-containing hydrophilic polymer in the coating agent for toilet toilets of the present invention may be appropriately set so as to satisfy the concentration at the time of use described later.

For example, in the case where the coating agent for a toilet bowl of the present invention is directly applied to the surface of the toilet bowl without dilution (hereinafter, it may be sometimes referred to as "non-concentrated type"), the toilet of the present invention The concentration of the betaine group-containing hydrophilic polymer in the toilet coating agent may be, for example, 0.000001% to 99% by weight, preferably 0.000002% to 30% by weight, and more preferably 0.00001% by weight. ~20% by weight.

Moreover, for example, in the case where the coating agent for a toilet bowl of the present invention is diluted with water and applied to the surface of the toilet bowl (hereinafter, it may be sometimes referred to as "concentrated type"), the toilet of the present invention The concentration of the betaine group-containing hydrophilic polymer in the toilet coating agent may be within a range in which the concentration after dilution becomes the concentration of the betaine group-containing hydrophilic polymer in the non-concentrated type The dilution ratio set by the method can be appropriately set. When the coating agent for toilet bowls of the present invention is a concentrated type, the dilution rate to be set may be, for example, about 10 times to 1,000,000 times, preferably about 100 times to 500,000 times, and more preferably 1000. Times ~ 100000 times.

[Other ingredients] In addition to the betaine group-containing hydrophilic polymer, the coating agent for toilets of the present invention may contain other additives or bases. Examples of such additives or bases include water, monohydric lower alcohols, polyhydric alcohols, surfactants, bleaching agents, perfumes, deodorants, colorants, solubilizers, bactericides, chelating agents, extenders, and dissolving agents. Sex modifiers, fillers, pH adjusters, thickeners, inorganic builders, organic builders, enzymes, etc.

When the coating agent for toilet bowls of the present invention is a non-concentrated type, water is prepared; monohydric alcohols having 2 to 5 carbon atoms such as methanol, ethanol, propanol, isopropanol, and butanol; ethylene glycol, propylene glycol, Aqueous bases such as polyhydric alcohols such as dipropylene glycol and glycerin may be adjusted so that the betaine group-containing hydrophilic polymer is at the concentration.

Moreover, when the coating agent for toilet bowls of the present invention is a concentrated type, the base material or additives are blended, and the concentration of the betaine-containing hydrophilic polymer is appropriately adjusted according to the set dilution ratio, It can be made into any of liquid, semi-solid, and solid shapes.

[Instructions] The coating agent for a toilet bowl of the present invention is used for the purpose of coating the betaine group-containing hydrophilic polymer on the surface of the toilet bowl (the surface of a bowl) to impart Anti-fouling effect of fecal dirt.

In order to apply the betaine group-containing hydrophilic polymer to the surface of the toilet bowl, the betaine group-containing hydrophilic polymer adjusted to the concentration may be brought into contact with the surface of the toilet bowl. When the coating agent for toilet toilets of the present invention is a non-concentrated type, the coating agent for toilet toilets of the present invention may be brought into direct contact with the surface of the toilet toilet. In addition, when the coating agent for toilet toilets of the present invention is a concentrated type, as long as the coating agent for toilet toilets of the present invention is diluted with water so as to become the set dilution ratio, it contacts the surface of the toilet toilet. can.

In order to make the coating agent for toilet toilets of the present invention contact the surface of the toilet toilet, spraying, coating, running water, etc. of the coating agent for toilet toilets of the present invention may be performed on the surface of the toilet toilet. When the coating agent for the toilet bowl of the present invention is brought into contact with the surface of the toilet bowl, it may be brushed with a brush if necessary.

The usage amount of the coating agent for toilet toilets of the present invention may be appropriately set according to the method of contacting the surface of the toilet bowl, etc. For example, as the usage amount per usage, the The betaine-based hydrophilic polymer is about 0.1 mg to 1000 mg.

Moreover, in the toilet bowl using the coating agent for toilet toilets of the present invention and coated with the hydrophilic polymer containing betaine group, the hydrophilic polymer containing betaine group will gradually flow out through the use of the toilet Therefore, for example, it is desirable to apply the coating agent for toilets and toilets of the present invention at a frequency of about 1 to 8 weeks. Furthermore, by making the coating agent for toilet toilets of the present invention in a state contained in flash water, the betaine group-containing hydrophilic polymer can be coated to The surface of the toilet bowl to maintain the coating state, so that the excellent anti-fouling effect continues.

2. Coating method of toilet bowl The method for coating a toilet bowl of the present invention is characterized in that the coating agent for a toilet bowl containing the hydrophilic polymer containing betaine group is brought into contact with the surface of the toilet bowl. The coating method of the toilet bowl of the present invention can give an excellent antifouling effect to the surface of the toilet bowl.

The specific aspect of the coating method of the toilet bowl of this invention is as described in the column of "1. Coating agent for toilet bowls" mentioned above. [Example]

Hereinafter, the present invention will be described with examples, but the present invention is not limited to these examples.

Test Example 1 First, the test liquid shown below was prepared. Betaine group-containing hydrophilic polymer containing liquid 1: contains general formula (1), n is 3; m is about 350; p is 3; R ² is the group shown in the general formula (2a) and R ²¹ is a hydrogen atom, R ²² is a -NH- group, R ²³ is a C 3 alkylene group; R ³ is a sulfobetaine group shown in the general formula (3a) and R ³¹ and R ³² are methyl groups , R ³³ is a C 3 alkylene group; R ⁴ is a hydrogen atom; X is a sulfur atom-containing betaine-containing hydrophilic polymer solution. The betaine group-containing hydrophilic polymer-containing liquid 1 contains 1% to 20% by weight of the betaine group-containing hydrophilic polymer. Betaine group-containing hydrophilic polymer containing liquid 2: contains general formula (1), n is 3; m is about 450; p is 3; R ² is the group shown in the general formula (2a) and R ²¹ is a methyl group, R ²² is an oxygen atom, R ²³ is a C 2 alkylene group; R ³ is a carboxybetaine group shown in the general formula (3b) and R ³⁴ and R ³⁵ are a methyl group and R ³⁶ It is a methylene group; R ⁴ is a hydrogen atom; X is a sulfur atom-containing betaine-based hydrophilic polymer solution. The betaine group-containing hydrophilic polymer-containing solution 2 contains 1% to 20% by weight of the betaine group-containing hydrophilic polymer. Isoprene glycol containing liquid: 99% by weight of isoprene glycol containing liquid, trade name "IPG-S" (Kuraray Co., Ltd.) Polyoxyethylene sorbitan monooleate containing liquid: trade name "Blanun OT-106" (Aoki Oil Industry Co., Ltd.) Polyoxyethylene sorbitan trioleate containing liquid: trade name "Blanun OT-320" (Aoki Oil Industry Co., Ltd.) Polyoxyethylene stearyl ether-containing liquid: trade name "blaunon SR-720" (Aoki Oil Industry Co., Ltd.) Polyglycerin fatty acid ester-containing liquid: trade name "Gulisafu (GLYSURF) DP-9" (Aoki Oil Industry Co., Ltd.) Polyoxyethylene synthetic alcohol ether containing liquid: trade name "FINESURF NE-50" (Aoki Oil Industry Co., Ltd.) Polyether modification Silicone containing liquid: Trade name "SH3771M" (Toray Dow Corning Co., Ltd.) Propylene glycol monoricinoleate containing liquid: Trade name "PGMR" (Ito Oil Co., Ltd.) Acrylic acid polymerization Liquid containing substance: Liquid containing 60% by weight of acrylic polymer, trade name "Polyflow KL-850" (Kyoeisha Chemical Co., Ltd.) Amphiphilic oligomer containing liquid: amphiphilic 14% by weight of oligomer containing liquid, trade name "Polyflow KL-900" (Kyoeisha Chemical Co., Ltd.) Polyethylene oxide containing liquid: Polyethylene oxide 96% by weight containing liquid 3. Trade name "Alkox (Ekoko) E-30" (Mingcheng Chemical Industry Co., Ltd.) Acetylene glycol containing liquid: Acetylene glycol 100% by weight containing liquid, trade name "Surfynol (485) "(Risin Chemical Co., Ltd.)

After cleaning the cut tiles of sanitary ware (KY tile P4-100, manufactured by Japan Test Panel Co., Ltd., 1 cm × 5 cm, thickness 0.5 cm) with acetone, wash with distilled water, and It was dried naturally. Two drops (about 40 μl) of the test solution were added dropwise to the cut ceramic tile after drying, spread and spread to the whole, and allowed to dry naturally. After that, on the surface of the cut tiles treated with the test solution, oleic acid as suspected feces was added dropwise to three places (0.02 g per one place), and it took 3 seconds to sink the cut tiles in this state to add The bottom of the beaker with 300 ml volume of 150 ml of distilled water at room temperature and let stand. The time from the time when the cut ceramic tile was sunk to the bottom of the beaker was measured to the time when all three suspected feces peeled off, and the antifouling effect was evaluated according to the following criteria. <Judgment criteria for antifouling effect> ◎: The time required for all the suspected feces at three places to peel off is 30 seconds or less. ○: The time required for all the suspected feces at the three places to peel off exceeds 30 seconds and is 60 seconds or less. ×: The time required for all the suspected feces at three places to peel off exceeds 60 seconds.

Table 1 shows the obtained results. In Comparative Examples 1 to 12 which are treatment liquids that have been used in the hydrophilization treatment of the hard surface in the past, the antifouling effect on the suspected feces is insufficient. On the other hand, in the case of using Examples 1 and 2 containing a betaine group-containing hydrophilic polymer solution containing a betaine group-containing monomer as a repeating unit and having a silanol group at one end, The anti-fouling effect of the suspected feces is particularly excellent.

[Table 1]

Test Example 2 As a test liquid, a betaine group-containing hydrophilic polymer-containing liquid 1 and a betaine group-containing hydrophilic polymer-containing liquid 2 used in the above Test Example 1 were prepared. After cutting the sanitary ware cut tiles (KY tile P4-100, manufactured by Japan Test Panel Co., Ltd., 1 cm × 5 cm, thickness 0.5 cm) with acetone, they were washed with distilled water and dried naturally . Two drops (about 40 μl) of the test solution were added dropwise to the cut ceramic tile after drying, spread and spread to the whole, and allowed to dry naturally. After that, the cut tiles were fixed in the experimental toilet bowl with the surface treated with the test liquid as the upper side, and flushing water was flushed 105 times (the amount of water per flush is about 10 l). After 105 flushes, the cut tiles are recovered and allowed to dry for 1 day. On the surface of the ceramic tile (the surface treated with the test solution) after natural drying, oleic acid as suspected feces was added dropwise to three places (0.02 g per one place), and it took 3 seconds to cut this state. The tiles were sunk to the bottom of a 300 ml volume beaker with 150 ml of distilled water at room temperature, and allowed to stand. The time from the time when the cut ceramic tile was sunk to the bottom of the beaker was measured to the time when all three suspected feces peeled off, and the antifouling effect after the water resistance test was evaluated using the same criteria as in Test Example 1 above.

Table 2 shows the obtained results. As a result, it was confirmed that when a liquid containing a betaine group-containing hydrophilic polymer containing a monomer having a betaine group as a repeating unit and having a silanol group at one terminal was used, even after 105 flushes It also maintains the coating with the betaine group-containing hydrophilic polymer, and plays an antifouling effect on suspected feces. [Table 2]

Test Example 3 As a test liquid, a betaine group-containing hydrophilic polymer-containing liquid 1 and a betaine group-containing hydrophilic polymer-containing liquid 2 used in the above Test Example 1 were prepared. After cutting the sanitary ware cut tiles (KY tile P4-100, manufactured by Japan Test Panel Co., Ltd., 1 cm × 5 cm, thickness 0.5 cm) with acetone, they were washed with distilled water and dried naturally . Two drops (about 40 μl) of the test solution were added dropwise to the cut ceramic tile after drying, spread and spread to the whole, and allowed to dry naturally. After that, the cut ceramic tile was immersed in 800 ml of artificial urine having the composition shown in Table 3 at 40° C. for 30 seconds. Then, the cut tiles were taken out from the artificial urine, immersed in 800 ml of tap water at 20°C for 60 seconds, and after taking out the tap water, they were allowed to dry naturally. The immersion into artificial urine and tap water was repeated 10 times. After that, the cut tiles are recovered and naturally dried for 1 day. On the surface of the ceramic tile (the surface treated with the test solution) after natural drying, oleic acid as suspected feces was added dropwise to three places (0.02 g per one place), and it took 3 seconds to cut this state. The tiles were sunk to the bottom of a 300 ml volume beaker with 150 ml of distilled water at room temperature, and allowed to stand. The time from the time when the cut ceramic tile was sunk to the bottom of the beaker was measured to the time when all three suspected feces peeled off, and the antifouling effect after artificial urine immersion was evaluated using the same criteria as in Test Example 1 above .

[Table 3] Composition of artificial urine

Table 4 shows the obtained results. As a result, it was confirmed that when a liquid containing a betaine group-containing hydrophilic polymer containing a betaine group-containing monomer as a repeating unit and having a silanol group at one terminal was subjected to surface coating, even if immersed in artificial After urinating, the state in which the hydrophilic polymer containing betaine group is coated is also maintained, so as to have an antifouling effect on suspected feces. [Table 4]

Test Example 4 As a test liquid, a betaine group-containing hydrophilic polymer-containing liquid 1 and a betaine group-containing hydrophilic polymer-containing liquid 2 used in the above Test Example 1 were prepared. After cutting the sanitary ware cut tiles (KY tile P4-100, manufactured by Japan Test Panel Co., Ltd., 1 cm × 5 cm, thickness 0.5 cm) with acetone, they were washed with distilled water and dried naturally .

The dried tile was subjected to the following additional friction treatment. A plastic brush (60 mm in length, 30 mm in width, and 30 mm in bristle length) is installed on the front end of the friction part of the Gakushin-type dyeing rubbing fastness testing machine (manufactured by Yasuda Seiki Co., Ltd.), and the plastic is made with 800 g of load The brush touches the surface of the cut ceramic tile (the surface treated with the test solution) after the treatment. Then, 0.1 g of tap water was added dropwise to the cut tiles, while maintaining a load of 800 g, and the plastic brush was repeated from one section of the cut tiles to the other end. In addition, the round trip on the cutting tile is a round trip speed of 2 seconds per round trip. Every 10 round trips, 0.1 g of tap water is added to the cutting tile for a total of 300 round trips.

After natural drying of the cut tiles after the additional friction treatment, oleic acid as suspected feces was added dropwise to three places (0.02 g per place) on the surface of the cut tiles (the surface treated with the test solution), It took 3 seconds to sink the cut tiles in this state to the bottom of a 300 ml beaker with 150 ml of distilled water at room temperature, and allowed to stand. The time from the time when the cut ceramic tile was sunk to the bottom of the beaker was measured to the time when all three suspected feces peeled off, and the antifouling effect after the frictional additional treatment was evaluated using the same criteria as in Test Example 1 above .

Table 5 shows the obtained results. As a result, it was confirmed that when a liquid containing a betaine group-containing hydrophilic polymer containing a betaine group-containing monomer as a repeating unit and having a silanol group at one terminal was subjected to surface coating, even when friction was added After the treatment, the state in which the hydrophilic polymer containing betaine group is maintained in the coating is also maintained, and the antifouling effect on the suspected feces is achieved. [table 5]

no

no

Claims (2)

A coating agent for toilet toilets, including a betaine group-containing hydrophilic polymer, the betaine group-containing hydrophilic polymer containing a betaine group-containing monomer as a repeating unit, and a silanol group at one end. A method for coating a toilet bowl, a coating agent including a hydrophilic polymer containing a betaine group is brought into contact with the surface of the toilet bowl, the hydrophilic polymer containing a betaine group includes a monomer having a betaine group as a repeating unit, And one end has a silanol group.