JP3460974B2 - Coating material having a bactericidal action and a method of repairing a building using the coating material - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a coating material having a bactericidal action which can be used for sterilization and sterilization of mold and moss generated in colored asbestos cement boards and cement tile single roofing materials used for building roofs. The present invention relates to a method of repairing a building using the coating material.

[0002]

2. Description of the Related Art Cement-based flat roofing materials such as colored asbestos cement boards and cement roof tile single roofing materials used for building roofs have a black or green surface on the surface of the roofing materials when exposed to weather and weather for years. Molds and moss are generated, which gives the appearance of a deteriorated visual effect to the entire building and damages the roof material and the entire building (building material). At present, atopic and bronchitis are regarded as problems with volatile organic compounds in the room, but it is also possible that the mold generated on the roof and outer walls scatters in the wind along with dust. It is conceivable that they will enter and breed. As described above, fungi and the like may enter the room and adversely affect the human body. Therefore, conventionally, as a method of reforming this kind of roofing material, a method of repainting the roofing material or changing the roofing material has been adopted.

[0003]

However, the method of repainting the roof material is an inexpensive and simple method,
By painting, mold etc. is temporarily hidden and the above-mentioned influence on the appearance can be eliminated, but since it does not fundamentally remove mold etc., the above-mentioned influence on the whole building and human body etc. It did not eliminate the effect. In addition, mold will begin to develop on the repainted surface within a few years, so that the above-mentioned appearance, the effect on the entire building, and the effect on the human body, etc. cannot be eliminated. In addition, as a method for changing the roofing material, specifically, there are a method of laying a new roof on the existing roofing material and a method of removing the existing roofing material and laying a new roof. However, with the former repair method, the appearance will be a new state, but since the existing roof with mold etc. remains under the new roof, the above-mentioned effect on the entire building remains as it is and mold fungus Since the intrusion into the room cannot be completely prevented, the influence on the human body etc. was not eliminated. In addition, the latter repair method removes mold and moss along with the old roofing material, thus eliminating all of the aforementioned appearance, effects on the entire building, and effects on the human body, but at a huge cost, There was also the problem of not being able to live during the construction period. Moreover, since molds start to appear on the surface of the new roof material within a few years , the above-mentioned appearance, the effect on the entire building, and the effect on the human body, etc. have not been eliminated after all .

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above, and is an agent A which is a fine powder of crushed natural silicate mineral and a styrene-acrylic acid ester copolymer.
And vinyl acetate / ethylene / vinyl chloride copolymer and 2-D
It is intended to provide a coating material having a bactericidal action, which is characterized in that it comprises a mixed liquid B agent containing tyl acetate .

Further, the present invention is characterized in that after the above-mentioned coating material is applied to the surface of an existing roofing material in which mold, moss and the like have been generated, finish coating is carried out or repeated roofing is performed. It also proposes a method of repairing a building using a coating material having

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The agent A used in the coating material of the present invention is a fine powder of crushed natural silicate minerals, which does not show an effective bactericidal action by itself, When used in combination, it exhibits an effective bactericidal action. It is desirable to use garnet powder as the fine powder particles of the crushed natural silicate mineral.

Further, B agent used in the coating material of the present invention, steel
Len / acrylic ester copolymer and vinyl acetate / eth
Ren-vinyl chloride copolymer and 2-ethyl acetate
It is desirable that the solid content is 12 to 13%,
Although it does not show an effective bactericidal action by itself, it shows an effective bactericidal action when used in combination with the finely divided natural silicate mineral powder such as garnet. further,
It also exhibits a film-forming effect for forming the coating material layer and an effect of improving the adhesion to the roof material.

Further, the basic components constituting the coating material of the present invention are the agents A and B as described above, but they do not hinder the addition of the other components and do not prevent the above-mentioned bactericidal action. As long as any component may be added. For example, when hydraulic cement is added, a high-strength coating material layer is obtained, so existing roofing materials typified by flat roofing boards such as colored asbestos cement boards with aged surfaces and cement tile single roofing materials. When applied to the surface of the roof material, the effect of repairing the surface of the roof material becomes great. Moreover, the effect of improving the adhesion is also imparted. The hydraulic cement is not particularly limited, but it is desirable to use white cement having a high pH value.

The coating material of the present invention comprises agents A and B as basic components.
It consists of an agent, and an appropriate amount of water, hydraulic cement, etc. is added as necessary. For example, since agent A and water alone do not use agent B, there is no film-forming component. It is not retained on the surface, and even if cement or the like is added and retained on the surface of the roofing material, garnet contained in the matrix does not exhibit an effective bactericidal action. Also, A
The agent B only forms a resin coating film without using the agent, and does not show an effective bactericidal action. That is, by using both agent A and agent B, sterilization and sterilization of mold and moss can be achieved by the combined effect of garnet etc. in agent A and acrylic resin in agent B.

For example, as a preferred example of the coating material of the present invention, garnet is used as the agent A, and styrene / acrylic ester copolymer, vinyl acetate / ethylene / vinyl chloride copolymer and 2-ethyl are used as the agent B. In the case of containing acetate and having a solid content of 12 to 13%, in order to surely sterilize mold and moss, agent A is 0.001 to 1 part by weight with respect to agent B by weight. , And water is preferably mixed in a ratio of 5 to 15 parts by weight.

The coating material of the present invention having such a constitution is a mold,
Apply directly to existing roofing material where moss occurs. The application method is not particularly limited, but a roller or brush application method and a spray method using a sprayer are suitable. The type of roof material to which the coating material is applied is not particularly limited,
As mentioned above, colored asbestos cement boards, cement roof tiles, single roofing materials, etc. that cause mold and moss are targeted. The amount of coating material applied is also not particularly limited, and the state of mold and moss that are breeding and the surface state of the roofing material (deteriorated state)
It may be set appropriately according to.

By applying the coating material to the surface of the roof material, the mold and moss propagated on the surface of the roof material can be sterilized and killed, and the generation of new mold and moss can be prevented. Moreover, since the coating material layer formed is transparent, it does not spoil the appearance of the colored coating inside the coating material layer. After that, finish painting or stack that. The paint for finish coating and the material for the thatched roof are not specified in any way.

[0013]

[Examples] [1] Investigation of Mold Species The mold species shown in Table 1 were confirmed when the mold species of the northern side roofing material for breeding (adhering) mold were investigated.

[Table 1]

[2] Coating material composition-A agent; mixed powder consisting of 50% by weight of white cement and 50% by weight of garnet-B agent: styrene / acrylic ester copolymer, vinyl acetate / ethylene / vinyl chloride Copolymer, solid content containing 2-ethylacetate 12 to 13%, solvent (water)
87-88% mixed liquid Agent A, agent B and water having the above composition were mixed at a ratio of 0.65: 1: 2.5 to prepare a coating material.

[3] Test Method 1 The coating material prepared in the above [2] was used in a roller [1]
It was applied to the surface of the roof material of the mold breeding north side. Black and green molds and moss were generated on the surface of the roofing material before applying, and the appearance was extremely unsatisfactory, but the application of the coating material gave a beautiful appearance.

[4] Test Results 1 After one month, part of the coating material was peeled off to expose the surface of the roofing material, and it was confirmed that black and green molds and moss were dead. In addition, it was confirmed from a laser interference microscope observation that it has antifungal properties. Therefore, it was confirmed that not only the surface was beautiful in appearance, but also the repair was carried out to kill mold and moss.

[5] Test Method 2 Sprinkle three kinds of the aqueous solution of acrylic resin, garnet powder, and mixed solution of aqueous solution of acrylic resin and garnet powder shown in the above [2] on the medium to sprinkle the mold on the north side roofing material of the above [1]. Is it possible to spread molds that are cut pieces to prevent mold growth or to kill them?
It was observed. First, JIS standard potato dextrose is dissolved in tap water and stirred (80 ° C x 5 minutes) for 80 minutes.
The temperature was raised to ° C and held for 5 minutes. Then, after transfer to a sterilized petri dish and sterilization (150 ° C. × 15 minutes), it was stored in a desiccator and kept at a humidity of 70% to solidify the medium. Each of the above three species was sprayed onto this medium, and then a mold sample was scattered and observed with a microscope.

[6] Test Result 2 No change was observed when only the acrylic resin aqueous solution or only the garnet powder was sprayed. When the mixed solution of the acrylic resin aqueous solution and the garnet powder was sprayed, it was confirmed that the mold that had been elongated for a short time was cut to about 50% and the shape was changed. Furthermore, regarding the mixed solution of acrylic resin aqueous solution and garnet powder, the influence on the antibacterial effect was investigated by increasing or decreasing the amount of garnet powder mixed. It was found that the addition of 1 to 40% garnet powder had almost no effect on the antibacterial result. Was confirmed.

[0019]

As described above, the coating material having the bactericidal action of the present invention can surely sterilize and sterilize the mold and moss propagated on the surface of the roofing material, so that the appearance caused by the mold and moss, It is possible to eliminate the effect on the entire building and the human body. Therefore, the roofing material may be repainted after applying the coating material of the present invention, a new roof may be laid on the existing roofing material as it is, and the raw material is also inexpensive, Renovation can be done easily at low cost, and the renovation period is extremely short, so you can live in it during the construction period.

Particularly when hydraulic cement is mixed,
The coating material layer obtained has a high strength, for example, when applied to the surface of an existing roofing material typified by a flat roofing board such as a colored asbestos cement board or cement tile single roofing material whose surface is aged, the roof material surface The repair effect of is great. Moreover, the effect of improving the adhesion is also imparted.

Front page continuation (51) Int.Cl. ⁷ Identification code FI C09D 125/04 C09D 125/04 127/06 127/06 131/04 131/04 E04G 23/03 E04G 23/03 (58) Fields investigated (58) Int.Cl. ⁷ , DB name) C09D 133/04 A01N 61/00 C09D 123/00 C09D 125/00 C09D 127/00 C09D 131/00 E04G 23/00

Claims (3)

(57) [Claims] 1. An agent A, which is a fine powder of crushed natural silicate minerals, and a styrene-acrylic acid ester copolymer.
Vinyl acetate / ethylene / vinyl chloride copolymer and 2-ethyl
A coating material having a bactericidal action, which is characterized in that it comprises a mixed liquid B agent containing luacetate. 2. A method comprising mixing hydraulic cement.
The coating material having a bactericidal action according to claim 1 . 3. A crushed natural case on the surface of an existing roofing material.
Agent A, which is a fine powder of formate minerals, and styrene acryl
Ester ester copolymer and vinyl acetate / ethylene / vinyl chloride
Mixture containing nyl copolymer and 2-ethyl acetate
After applying a coating material consisting of liquid B agent, finish coating
Bactericidal action characterized by wearing or stacking
Method for renovating buildings using coating materials that have