JPH09125095A - Cleanser for concrete or pillar tree - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleansing agent capable of being simply used, giving sufficient cleansing effects, and used for concretes or pillar trees. SOLUTION: This cleansing agent comprises one or more kinds of oxygen bleaching agents selected from hydrogen peroxide, peroxoborate salts, peroxocarbonate salts and peroxosulfate salts and a coating film-forming material. The cleansing agent is dissolved in water and/or a lower aliphatic alcohol, and the dissolution mixture is coated on an application surface to form a coating film. Thus, it is utilized that the bleaching agent component in the coating film contacts with stained parts, and a sufficient cleansing effect is given. The cleaning agent does not drip down when coated, and the stains can be removed only by peeling the coating film after the cleansing. The use of the cleansing agent is therefore extremely simple. The coating film-forming material is selected from polyvinyl alcohol, polyethylene glycol, a vinyl acetate polymer emulsion, polyvinylpyrrolidone, polyacrylic acid, alginic acid, cellulose, starch, pullulan, etc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detergent for concrete or shirasu.

[0002]

2. Description of the Related Art In order to remove color unevenness and clean dirt on the surface of concrete exposed outdoors, a method of blowing it away with water pressure, a method of polishing it with an abrasive, and the like are performed.
In addition, since the surface of precast concrete or mortar (PC product) is in a reduced state and color unevenness is likely to occur, a method of applying or spraying an oxidizing agent such as hydrogen peroxide has been proposed as a method of removing this. (Japanese Patent Laid-Open No. 7-139082). However, these methods have a problem that not only the cleaning liquid but also dirt is scattered around.

On the other hand, the bleaching agent is widely used because the white wood used for the pillars, furniture, floors and the like of houses is easily soiled and its discoloration is conspicuous (JP-A-61-68978). However, since the bleaching agent application surface is not always horizontal, it is necessary to pay particular attention to runoff from the application surface during work. In addition, work such as covering the bleached surface with a cover to protect it from the bleaching agent scattered during coating is performed separately. In order to solve the above problems, a method has been proposed in which silicon oxide powder or the like is added to a bleaching agent to obtain a paste composition, which is applied using a spatula or the like and wiped with water after 10 to 20 minutes ( JP-A-60-26099), it is difficult to clean fine irregularities. In addition, the wiping operation after bleaching may stain the surrounding area.

[0004]

In all of the prior arts, the effect is not sufficient just by applying the bleaching agent, and it is necessary to use strong water pressure or polish. If a chlorine-based bleaching agent having a strong bleaching action is used, this need is eliminated, but there is a problem in that it is difficult to handle such as discomfort due to a chlorine odor and peeling back. In addition, it is necessary to be careful so that the splash does not get into the eyes or inhale the generated gas, which is not appropriate considering the splash to the surroundings.

On the other hand, when the place to be cleaned is in a house, care must be taken to prevent the bleach from adhering to the surroundings, and it is not appropriate to use a cleaning agent that may scatter. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and provide a cleaning agent for concrete or shirasu which can be easily cleaned regardless of the place of use and is sufficiently effective.

[0006]

The cleaning agent for concrete or shirasu of the present invention comprises at least one oxygen-based bleaching agent selected from hydrogen peroxide, peroxoborate, peroxocarbonate and peroxosulfate, A film-forming material is blended. In the method for cleaning concrete or shirasu of the present invention, a mixture prepared by dissolving or dispersing the above cleaning agent in water and / or an aliphatic lower alcohol is applied to an application surface to form a film, and the film is dried. It is characterized in that it is later removed from the application surface.

In the present invention, the above-mentioned detergent is applied to the application surface to form a film, so that the oxygen-based bleaching agent component is brought into contact with the application surface in a wet state suitable for exhibiting a bleaching action, and It was found that the dried film can be easily peeled off after the bleaching is completed.

The oxygen-based bleaching agent is preferably 0.5 to 90% by weight of the cleaning agent of the present invention. More preferably, it is 2 to 40% by weight from the viewpoint of the peelability of the film. The composition of the above-mentioned peroxoborate, peroxocarbonate, peroxosulfate is, for example, "Chemical Dictionary", edited by the Chemical Dictionary Editing Committee, Kyoritsu Shuppan Co., Ltd., published in 1989, peroxoborate, peroxocarbonate, peroxo. Each is described in the section on sulfates.

The film-forming material of the present invention is a hydrophilic material which dissolves or disperses in water and / or an aliphatic lower alcohol and is selected from those which form a film. Specifically, polyvinyl alcohol; polyalkylene glycol such as polyethylene glycol, polypropylene glycol, polytetramethylene glycol; vinyl acetate emulsion; vinyl acetate-vinyl chloride emulsion, ethylene-
Copolymer emulsions such as vinyl acetate emulsion and acrylic-ethylene-vinyl acetate emulsion; acrylic emulsion; natural rubber latex, chloroprene latex; polyvinylpyrrolidone, polyacrylic acid, alginic acid, cellulose, starch, pullulan and the like.

As the film forming material, instead of or in addition to the above-exemplified hydrophilic compound, a derivative or modified material of the exemplified hydrophilic compound may be used. The above film-forming materials may be used alone or in combination.

Examples of the polyvinyl alcohol derivatives include acetalized polyvinyl alcohol, butyralized polyvinyl alcohol, and formalized polyvinyl alcohol. Further, it is also possible to use those obtained by reacting polyvinyl alcohol with dialdehyde, side chain aldehyde, polyacrolein, ester, diisocyanate and the like.

Examples of the polyalkylene glycol derivative include carboxylated polyalkylene glycol. Examples of the polyacrylic acid and polyacrylic acid salt include aldehyde-modified polyacrylic acid, polyacrylic acid ester, and polymethyl acrylate. Examples of the cellulose derivative include carboxymethyl cellulose, hydroxymethyl cellulose, hydroxypropyl cellulose, methyl cellulose, ethyl cellulose, ethyl hydroxymethyl cellulose and the like.

As the above-mentioned starch derivative, starch esters such as acetic acid ester, succinic acid ester, nitric acid ester, phosphoric acid ester, xanthogenic acid ester and the like;
Starch ethers such as allyl ether, methyl ether, carboxymethyl ether, carboxyethyl ether, hydroxyethyl ether, hydroxypropyl ether, positive starch; formaldehyde cross-linked starch, epichlorohydrin cross-linked starch, phosphate cross-linked starch, acrolein cross-linked starch, etc. . Examples of the pullulan modifying material include pullulan acetate.

In order to form a film capable of exhibiting hydrophilicity and water resistance at the same time under high humidity conditions and retaining a certain amount of water under dry conditions, a hydrophilicity imparting agent such as the above polyvinyl alcohol derivative is used as a film forming material. Ingredients, polyvinyl alcohol, polyethylene glycol, vinyl acetate emulsion, vinyl acetate emulsion modified material,
It is preferable to use a mixture of hydrophilicity-imparting components such as polyvinylpyrrolidone, polyacrylic acid, polyacrylic acid salt, starch, starch derivative, pullulan, pullulan derivative, cellulose, and cellulose derivative. When the water resistance imparting component and the hydrophilicity imparting component are mixed and used, the water resistance imparting component is preferably 25 to 45% by weight, and the hydrophilicity imparting component is 5 to 50% by weight in the detergent. It is preferable.

In the cleaning method of the present invention, since the stain is removed by peeling the formed film, it is preferable that peeling can be performed easily without requiring excessive force like a makeup pack. The composition containing the film forming material of the present invention exhibits extremely good peelability.

Further, a plasticizer such as glycerin may be added to the detergent of the present invention in order to impart viscosity, elasticity and strength to the formed film.

An aliphatic lower alcohol can be added as a control of the film formation time and as a solvent of an organic substance. As the aliphatic lower alcohol, ethanol and isopropyl alcohol are preferable. The amount of the aliphatic lower alcohol added is preferably 1 to 30% by weight of the detergent.

A surfactant may be added to improve the peeling property and defoaming of the formed film. As the above-mentioned surfactant, anionic potassium potassium phosphate,
Nonionic modified silicone emulsion, polyoxyethylene nonylphenyl ether, and sorbitan fatty acid ester are preferable. The amount of the surfactant added is preferably 1 to 10% by weight of the detergent.

In order to further increase the viscosity of the detergent, natural polymers such as gum arabic, guar gum and xanthan gum are added as organic thickeners, and aluminum silicate, magnesium silicate, silica gel and the like are added as inorganic thickeners. Good.

A bleaching activator can be added to the detergent of the present invention to accelerate the development of the bleaching effect. The bleach activator is not particularly limited as long as it is a compound that reacts with an oxygen-based bleaching agent in an aqueous solution to generate an organic peracid or the like. Specifically, nitrile compounds such as acetonitrile and phthalonitrile; o-acetyl compounds such as glucose pentaacetate and pentaerythritol tetraacetate; N- such as N, N, N ′, N′-tetraacetylethylenediamine and diacetylmethyleneformamide. Acyl compounds; acid anhydrides such as phthalic anhydride and succinic anhydride; cyanamide, halogenated triazine and the like.

Additives such as sequestering agents, antibacterial agents, antiseptics, fragrances and pigments can be added to the detergent of the present invention.

Peroxoborate, peroxocarbonate,
Water must be present at the time of use in order for the peroxosulfate to exhibit bleaching performance. The amount of water present at the time of use is preferably 2 to 70% by weight. The water may be added at the time of use or stored with the cleaning agent of the present invention. If you want to store both water and cleaning agent,
It is preferable to store the bleaching agent component and water or a water-containing component in a separated form so that the bleaching agent component of the present invention does not exhibit the bleaching performance by the time of use.

Since the film formed by the cleaning agent of the present invention has a property of being dissolved or dispersed in water, it can be removed by washing with water. Therefore, depending on the location of use, removal by washing with water can be performed instead of peeling.

[0024]

【Example】

Example 1 Polyvinyl alcohol (TN-K-2, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) as a film-forming material was dissolved in an isopropyl alcohol solution (manufactured by Wako Pure Chemical Industries, Ltd.). Glycerin (manufactured by Nacalai Tesque, Inc.) and purified water were sequentially mixed. Sodium peroxocarbonate (Na ₂ CO ₃ · 1.5 as a bleaching agent
H ₂ O ₂ and PC-A manufactured by Nippon Peroxide Co., Ltd. were mixed and well stirred to obtain a film-forming detergent. The mixing ratios are as shown in Table 1 (Table 1-1 and Table 1-2 are collectively referred to as Table 1. The same applies hereinafter).

Example 2 Hydrogen peroxide solution (manufactured by Wako Pure Chemical Industries, Ltd.) was used in place of the sodium peroxocarbonate used in Example 1, and potassium alkyl phosphate salt (manufactured by Kao, Electrostripper F) was used as a surfactant. A film-forming detergent was obtained in the same manner as in Example 1 except that The mixing ratio is as shown in Table 1.

Example 3 A film-forming detergent was obtained in the same manner as in Example 2 except that pullulan (Trigluco-A manufactured by Hayashibara Shoji Co., Ltd.) was used instead of the polyvinyl alcohol used in Example 2. The mixing ratio is as shown in Table 1.

Example 4 Instead of the polyvinyl alcohol used in Example 2, polyvinylpyrrolidone (Kollidon manufactured by Gokyo Sangyo Co., Ltd.) was used.
A film-forming detergent was obtained in the same manner as in Example 2 except that K-30) was used. The mixing ratio is as shown in Table 1.

Example 5 In addition to the formulation of Example 1, as a thickener, carboxymethyl cellulose (H-CMC manufactured by Daicel Chemical Industries, Ltd.),
N, N, N ′, N′-tetraacetylethylenediamine as a bleach activator (T, manufactured by Hoechst Industry Co., Ltd., T
AED 4016) and an alkylphosphoric acid potassium salt (Keisho Electrostripper F) as a surfactant were used to obtain a film-forming detergent. The mixing ratio is as shown in Table 1.

Example 6 A film-forming cleaning was carried out in the same manner as in Example 5 except that polyvinyl acetal (Eslek KX-1 manufactured by Sekisui Chemical Co., Ltd.) was used in place of the polyvinyl alcohol used in Example 5. I got an agent. The mixing ratio is as shown in Table 1.

Examples 7 and 8 Instead of the polyvinyl alcohol used in Example 5, polyvinyl acetal and vinyl acetate emulsion (solid content 4
2%, Sekisui Chemical Co., Ltd., Esdyne # 5380)
A film-forming detergent was obtained in the same manner as in Example 5 except that the above was used. The mixing ratio is as shown in Table 1.

Comparative Example 1 3% hydrogen peroxide solution was used as a bleaching cleaning solution.

Comparative Example 2 90 parts by weight of purified water was added to 10 parts by weight of sodium peroxocarbonate to form a slurry, which was used as a bleaching and washing solution.

Comparative Example 3 Sodium hypochlorite (Wako Pure Chemical Industries, Ltd.) was diluted with purified water, and silicon dioxide powder (Wako Pure Chemical Industries, Ltd.) and aluminum silicate powder (Wako Pure Chemical Industries, Ltd.) were added. What was mixed and made into a paste was used as a bleaching detergent.

[0035]

[Table 1]

<Cleaning Test> The film-forming detergents of Examples 1 to 8 were applied to the surface of concrete with conspicuous stains and the surface of the sapwood part which was discolored to brown, using a brush. In this state, leave it to dry, and after 1 hour, 3 hours, 2 times,
The formed film was peeled from the joint portion, and the degree of cleaning of the coated surface was visually determined. In addition, the bleaching detergents of Comparative Examples 1 to 3 were applied, and after 1 hour and 3 hours, the same determination was performed twice. The workability and odor were also determined as follows. Table 1 shows the determination results. The criteria are as follows. <Cleaning effect> ◎ Completely whitened within 1 hour. ○ It turned completely white after 3 hours. Δ: White, but some remaining stains were observed. × No cleaning action was observed. <Workability> ○ There was no dripping at the time of application, and removal of the cleaning agent was easy only by peeling off the film. △ There was no dripping during application, but it was necessary to wash with water to remove the cleaning agent. × There was dripping during application, which required special attention during work. <Odor> ○ There was no particular unpleasant odor. × There was discomfort due to chlorine odor.

[0037]

Industrial Applicability The method for cleaning concrete or shirasu of the present invention comprises applying a mixture prepared by dissolving or dispersing the above cleaning agent in water and / or an aliphatic lower alcohol to the application surface to form a film, It is characterized in that the coating is dried and then removed from the application surface. With the cleaning agent of the present invention,
Unlike conventional liquid cleaners, it does not drip, so
Since the bleaching agent can be kept in contact with the soiled portion, efficient cleaning can be performed. Further, according to the cleaning method of the present invention, stain removal can be easily achieved by peeling the film. Therefore, it is not necessary to perform additional work such as polishing and wiping, and the work is extremely simple. It is especially effective for cleaning and bleaching indoors where you cannot wash with water and want to prevent the bleach from scattering.

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[Procedure amendment]

[Submission date] January 9, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

[0014] At the same time expressing hydrophilicity and water resistance at high humidity conditions, in order to form capable of holding the film constant moisture in dry conditions, as a film-forming material, resistant aqueous imparting such as the polyvinyl alcohol derivative Ingredients, polyvinyl alcohol, polyethylene glycol, vinyl acetate emulsion, vinyl acetate emulsion modified material,
It is preferable to use a mixture of hydrophilicity-imparting components such as polyvinylpyrrolidone, polyacrylic acid, polyacrylic acid salt, starch, starch derivative, pullulan, pullulan derivative, cellulose, and cellulose derivative. When the water resistance imparting component and the hydrophilicity imparting component are mixed and used, the water resistance imparting component is preferably 25 to 45% by weight, and the hydrophilicity imparting component is 5 to 50% by weight in the detergent. It is preferable.

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0027

[Correction method] Change

[Correction contents]

The pullulan instead of polyvinyl alcohol used in Example 3 Example 1 (Hayashibara Shoji Inc., Toriguruko -A) except for using, to obtain a film-forming detergent in the same manner as in Example 1. The mixing ratio is as shown in Table 1.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0028

[Correction method] Change

[Correction contents]

Example 4 Instead of the polyvinyl alcohol used in Example 1 , polyvinylpyrrolidone (Kollidon manufactured by Gokyo Sangyo Co., Ltd.) was used.
A film-forming detergent was obtained in the same manner as in Example 1 except that K-30) was used. The mixing ratio is as shown in Table 1.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0035

[Correction method] Change

[Correction contents]

[0035]

[Table 1]

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0036

[Correction method] Change

[Correction contents]

<Cleaning Test> The film-forming detergents of Examples 1 to 8 were applied to the surface of concrete with conspicuous stains and the surface of the sapwood part which was discolored to brown, using a brush. In this state, leave it to dry, and after 1 hour, 3 hours, 2 times,
The The formed film cleaning degree of the coated surface was peeled from the coated surface was determined by visual observation. In addition, the bleaching detergents of Comparative Examples 1 to 3 were applied, and after 1 hour and 3 hours, the same determination was performed twice. The workability and odor were also determined as follows. Table 1 shows the determination results. The criteria are as follows. <Cleaning effect> ◎ Completely whitened within 1 hour. ○ It turned completely white after 3 hours. Δ: White, but some remaining stains were observed. × No cleaning action was observed. <Workability> ○ There was no dripping at the time of application, and removal of the cleaning agent was easy only by peeling off the film. △ There was no dripping during application, but it was necessary to wash with water to remove the cleaning agent. × There was dripping during application, which required special attention during work. <Odor> ○ There was no particular unpleasant odor. × There was discomfort due to chlorine odor.

Claims (2)

[Claims] 1. A detergent for concrete or shirasu, which comprises a film-forming material and at least one oxygen bleach selected from hydrogen peroxide, peroxoborate, peroxocarbonate, and peroxosulfate. 2. A mixture of the detergent according to claim 1 dissolved or dispersed in water and / or an aliphatic lower alcohol,
A method for cleaning concrete or shirasu, which comprises applying the composition to a surface to be applied to form a film, drying the film, and then removing the film from the application surface.