JPH11106706A - Remodeling method of wall surface by coating, and coating composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To coat a wall surface directly without a sealer and satisfy fire prevention standards by forming on a wall surface a coating film having a specific Young's modulus and extensibility. SOLUTION: A coating composition is coated at 100-700 g/m<2> on a wall surface, all or a part of which vinylcloth, wallpaper or the like is still adhered, and dried to form a coating film having a Young's modulues of 25-300 Kg/cm<2> , an elongation of 25-100%, and a thickness of 180-350 μm which effectively prevents bleeding of tar or the like. The coating composition comprises 10-70 wt.% of a mineral pigment, e.g. calcium carbonate, 2-14 wt.% of an organic binder with a Tg of from -10 to -50 deg.C, e.g. an acrylic resin, 0.2-35 wt.% of a hollowed organic polymer, and 20-60 wt.% of a medium, e.g. water and an organic solvent. The hollowed organic polymer is a particle having a particle size of 2-500 μm of a solid or semisolid organic polymer, e.g. an acrylic resin, and has a closed-space content of 17-99 vol.%. The surface of the particle is preferably coated with titanium dioxide or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of painting a paint on a wall surface such as an interior wall surface of a building to renovate the wall surface and a paint composition used for the renovation.

[0002]

2. Description of the Related Art Recently, exterior and interior walls of buildings have been actively remodeled. In the interior of the building,
Generally, vinyl cloth is often used. In the case of renovating the wall surface to which such a vinyl cloth is pasted, it is not easy to peel off the vinyl cloth over the entire surface, and a method of applying a paint on the vinyl cloth and remodeling without removing the vinyl cloth is adopted. Often. In such remodeling, after applying a sealer for vinyl cloth generally made of acrylic emulsion, etc.,
The top coat is painted on it.

[0003]

In the renovation of the wall by the conventional coating as described above, it is necessary to apply a sealer and then a top coat, which requires a long time for the operation and is inefficient. There was a problem.

[0004] Further, there is a problem that tobacco tar adhering to the vinyl cloth or a plasticizer in the vinyl cloth bleeds on the coating film after coating, and the appearance of the coating film deteriorates. .

As a method of solving such a problem, a method of increasing the thickness of the coating film is considered. However, if the thickness of the coating film is increased, cracks are likely to occur. There is no known wall coating composition for application.

In some cases, the vinyl cloth is peeled off before coating, but in such a case, the vinyl cloth or the like may remain on the wall surface, and a step may occur on the wall surface. In order to flatten such a step, it was necessary to increase the film thickness before painting.

Strict fire protection standards are imposed on building interiors, and therefore paint compositions for building interiors must be able to comply with such fire protection standards.

[0008] An object of the present invention is to apply a coating so thick that it can be applied directly on a wall surface without using a sealer, and bleeding of a resin or a plasticizer from the wall surface can be prevented. It is an object of the present invention to provide a method of retrofitting a wall surface by coating and a coating composition which can be adapted to a fire prevention standard and can be adapted to fire protection standards.

[0009]

SUMMARY OF THE INVENTION The present invention relates to a method of refurbishing a wall by applying a paint on the wall.
３００300 kg / cm ² , preferably 150-300 kg
/ Cm ² and a coating film having a Young's modulus of 25 to 200%.

If the Young's modulus and the elongation are lower than these ranges, cracks and peeling of the coating film and peeling of vinyl cloth due to internal stress of the coating film may occur. Conversely, if the Young's modulus and the elongation are higher than these ranges, the physical properties of the coating film may be adversely affected.

In the present invention, the measurement of the Young's modulus and the elongation of the coating film was carried out at 20 ° C. using a Tensilon tester RTM-100 manufactured by Toyo Baldwin.
In the present invention, the wall surface on which the paint is applied is not particularly limited, and the present invention can be applied to a wall surface such as a vinyl cloth, a wallpaper, a cloth cloth, a paint base, a decorative board base, and the like. Useful for cloth walls.

The present invention can also be applied to a wall surface in which a vinyl cloth or the like is partially removed. There is a step on the wall surface where the vinyl cloth or the like remains on the wall surface after the vinyl cloth or the like is partially peeled off. However, according to the present invention, the film can be applied with a large film thickness. It is also useful for wall surfaces having

In the present invention, the method of applying the paint on the wall surface is not particularly limited, and the paint can be applied using a roller, a spatula, a brush, a paint gun, or the like.
In the case of painting on indoor wall surfaces, painting with a roller or a brush is preferred.

In the present invention, the coating amount of the paint is 100 g.
/ M ² ~700g / m ^2, more preferably an ^{300g / m 2 ~500g / m 2} . With such an application amount, it is possible to effectively prevent bleeding of a dent or the like from the wall surface. As for the film thickness,
It is preferably 350 μm.

In the present invention, the coating is generally applied and then dried at room temperature. The drying time varies depending on the environment and the like, but is generally about 5 to 24 hours. Moreover, you may heat and dry a coating film as needed.

In the present invention, after a paint is applied on a wall surface to form a coating film, an overcoating film may be further formed thereon. A paint for forming such a top coat is preferably a water-based paint in consideration of environmental aspects. As such a water-based paint, an emulsion-type normal one can be used, and furthermore, a water-based paint having a function such as a multi-colored paint, an antibacterial paint, a deodorant paint, or a flame-retardant paint is used according to the purpose. Can be used.

[0017] The amount of the top coat is generally 1
About 100 to 200 g / m ² is preferable. In the present invention, when a top coat is not formed, the coat on the wall surface can be made thick to give a design such as a waveform to the surface of the coat.

The coating composition of the present invention is a coating composition that can be used in the above-described remodeling method of the present invention, and is characterized by containing a medium, an inorganic pigment, an organic binder, and an organic polymer hollow body. . Hereinafter, the components of the coating composition of the present invention will be described.

[0019] As the medium medium can be water or an organic solvent, the organic solvent, alcohol-based, hydrocarbon-based, ketone-based,
Ester-based or ether-based organic solvents can be used. From the viewpoint of safety, it is preferable to use water as the medium. The content of the medium in the coating composition is 20
~ 60% by weight is preferred. If the content is outside these ranges, a problem may occur in the coating workability.

Inorganic extender pigment As the inorganic extender pigment, for example, calcium carbonate, silica powder, talc, clay, mica, aluminum hydroxide and the like can be used. In order to further enhance the effect of, for example, tarnishing in the obtained coating film, it is preferable to use calcined clay as the inorganic extender. The content of the inorganic extender in the coating composition is preferably from 10 to 70% by weight.

Organic Binder The organic binder may be any organic binder that allows the Young's modulus and the elongation of the formed coating film to have the above-mentioned predetermined values.
Is preferably −10 to −50 ° C. Examples of the type of the organic binder include an acrylic resin, a vinyl acetate resin, a vinyl chloride resin, and a silicone resin. The content of the organic binder in the coating composition is preferably 2 to 14% by weight.

Hollow Organic Polymer The hollow organic polymer used in the present invention is a solid or semi-solid organic polymer particle having an enclosed space therein, and usually has a spherical or nearly spherical shape. Have. Generally, the particle size is preferably from 2 to 500 μm, and more preferably from 5 to 200 μm. The ratio of the space enclosed therein to the total volume of the particles is 17 to 99% by volume.
It is preferred that

The organic polymer forming the space includes, for example, acrylic resin, vinyl chloride resin, SBR, silicone resin and the like. Further, an inorganic material such as titanium dioxide and calcium carbonate may be further coated around the organic polymer. It is preferable that the ratio of such an inorganic material is 1,000 parts by weight or less based on 100 parts by weight of the organic polymer hollow body.

The content of the hollow organic polymer in the coating composition is preferably from 0.2 to 35% by weight. In the coating composition of the present invention, by adding such an organic polymer hollow body, it is possible to impart softness to a coating film to be formed, and it is possible to comply with fire prevention standards.

Other Ingredients Other additives such as a thickener and a preservative can be added to the coating composition of the present invention, if necessary.

Organic Substance Content The coating composition of the present invention preferably has an organic substance content of 15% by weight or less in order to enhance fire resistance and meet fire protection standards. As the organic substance in the coating composition,
Examples of the medium include an organic solvent, an organic binder, an organic substance (excluding an inorganic material when coated with an inorganic material) in an organic polymer hollow body, and an additive. The coating composition of the present invention can be prepared by mixing the respective components with an arbitrary method.

[0027]

According to the present invention, without using a sealer,
It can be retrofitted by applying paint directly on the wall. Therefore, the remodeling can be performed more efficiently than the conventional remodeling method using a sealer.

Further, according to the present invention, since the coating can be applied with a large film thickness, it is possible to effectively prevent bleeding of a resin or a plasticizer from a wall surface. Furthermore, according to the present invention, the content of the organic substance can be reduced to 15% by weight or less, and a coating film applicable to strict fire prevention standards can be formed.

[0029]

BEST MODE FOR CARRYING OUT THE INVENTION Preparation of coating composition A coating composition was prepared at the compounding ratio shown in Table 1.

[0030]

[Table 1]

As the organic polymer hollow body, trade name “Microsphere” (manufactured by Matsumoto Yushi Co., Ltd., average particle diameter 20 μm,
Ratio of the space enclosed therein to the total volume of the particles: 8
6% by volume, coated with titanium dioxide, with an organic content of 30% by weight and a titanium dioxide content of 70% by weight). Further, as the acrylic resin emulsion, an acrylic resin emulsion (solid content: 45% by weight) with Tg = −29 ° C. was used. The organic substance content of the coating composition shown in Table 1 was 11.75% by weight.

Coating physical property test The above coating composition was applied in a film thickness of 10 mil, 20 mil and 30 mil, and the obtained coating film was 20 mm long × 10 mm wide.
Was measured at 20 ° C. using a Tensilon tester RTM-100 manufactured by Toyo Baldwin Co., Ltd. Each sample was measured three times. Table 2 shows the average value.

[0033]

[Table 2]

Vinyl cloth adhesion test A glass plate with a vinyl cloth adhered thereon is used as a test plate, and the above-mentioned coating composition diluted to about 80 ps is applied on the glass plate at 350 to 400 g / m ² using a brush. And dried for one week to obtain a coating film. For the obtained coating film, as a result of performing a peeling test using cellophane tape,
No peeling was observed. No abnormalities were observed in the appearance after immersion in water for 18 hours. In addition, the peeling test using a cellophane tape was performed on 9 squares by drawing lines at 3 mm intervals three by three. The same applies to the following cellophane peel test.

Coating undercoat adhesion test A test plate was prepared by applying Hivinylex 70 (trade name, a vinyl-based emulsion paint manufactured by Nippon Paint Co., Ltd.) to a slate plate sealed on the back and side surfaces. The above-mentioned coating composition diluted to a coating amount of 350 to 400 g / m ² is applied using a brush,
After drying for one week, a coating film was obtained. The obtained coating film was subjected to a peeling test using cellophane tape. As a result, no peeling was observed. No abnormalities were observed in the appearance after immersion in water for 18 hours.

A crack resistance test glass plate with a vinyl cloth adhered thereto was used as a test plate, and the above-mentioned coating composition diluted to about 80 ps was rolled on the test plate using a roller at 200 g / m ² and 400 g, respectively.
The coating is three coating amount of g / m ² and 600 g / m ^2, placed in a wind tunnel that is adjusted to the wind speed 3m / s ± 10%, a cracking resistance test based on JIS-A-6909 went. As a result, no crack was observed on the surface of the coating film of any application amount.

Top coat adhesion test On a slate plate whose back and side surfaces are sealed, about 80 p
s diluted with the above-mentioned paint composition,
Coating was performed so that the coating amount was 400 g / m ^{2, and} the coating was dried for one day to obtain a coating film.

On this coating film, the following top coats were applied so that the coating amount was 100 to 150 g / m ² , respectively, and dried for one week to obtain a coating film. The obtained coating film was subjected to a peeling test using cellophane tape. As a result, no peeling was observed. Also, no abnormality was observed in the appearance after immersion in water for 18 hours.

Topcoat paint High Vinylex 70: trade name, vinyl-based water-based emulsion paint manufactured by Nippon Paint Co., Ltd. Audefine Act: trade name, acrylic-based water-based emulsion paint manufactured by Nippon Paint Co., Ltd. Medico EP: trade name :, Nippon Paint Antibacterial acrylic water-based emulsion paint Eudepatio: trade name, reaction-curable acrylic water-based emulsion paint manufactured by Nippon Paint

A plasticizer migration stop test glass plate on which vinyl cloth was stuck was used as a test plate, and the above-mentioned coating composition diluted to about 80 ps was placed thereon.
Using a brush, the composition was applied so as to have an application amount of 350 to 400 g / m ² and dried for 1 hour. The resulting coating film, and
Furthermore, the above-mentioned Hi-Vinyrex 70 is put on it for 100-1.
6 g of a coating film applied to a coating amount of 50 g / m ²
Dry at 0 ° C. for 10 days. When the surface of each coating film was evaluated by tactile sensation, no tackiness was observed, and it was confirmed that the plasticizer had not migrated to the surface.

A test piece to which a vinyl cloth was stuck on a glass plate was put into a 9-liter desiccator, and a predetermined number of cigarettes (trade name "Highlight") were lit and burned. Dirt was attached.

Using this as a test plate, each of the above-mentioned coating compositions diluted to about 80 ps was applied in an amount of 200 g using a brush.
/ M ^2, was applied so that the three kinds of coating weight of 400 g / m ² and 600 g / m ^2, to obtain a coating film was dried for 1 week. The color difference of the obtained coating film was measured using a color difference meter CR200 manufactured by Minolta. Further, after the coating composition was dried for one day after application, Hyvinyrex 70 was applied.
Was further applied and dried for one week, and the color difference was similarly measured for the coating film obtained. Table 3 shows the measurement results.

The color difference is a value evaluated by using a material coated on a vinyl cloth to which no tar is attached as a standard.

[0044]

[Table 3]

FIG. 1 shows the relationship between the coating amount and the color difference in each sample. As is clear from Table 3 and FIG. 1, it can be seen that the color difference decreases as the coating amount increases, and that the anti-tarnish effect is improved. In addition, it can be seen that the application of the top coat further enhances the effect of applying the dust.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a color difference and a coating amount in an example according to the present invention.

(72) Inventor Hiroyuki Oba 5-33-11 Kumegawacho, Higashimurayama-shi, Tokyo

Claims (7)

[Claims] 1. A method of applying a paint on a wall surface to refurbish the wall surface, wherein a coating film having a Young's modulus of 25 to 300 kg / cm ² and an elongation of 25 to 200% is formed on the wall surface. A method of renovating a wall by painting. 2. The coating amount of the paint is 100 g / m ^{2 to} 7 g.
The method for renovating a wall surface by painting according to claim 1, wherein the weight is 00 g / m ² . 3. The method according to claim 1, wherein the wall is a vinyl cloth wall. 4. The method according to claim 1, further comprising forming a top coat on the coating. 5. A coating composition for refining a wall surface by applying a coating material on a wall surface, the coating composition comprising a medium, an inorganic pigment, an organic binder and an organic polymer hollow body. . 6. A coating film obtained from the coating composition,
Young's modulus of 5 to 300 kg / cm ² and 25 to 200%
The coating composition according to claim 5, which is a coating film having an elongation percentage of: 7. An organic substance content in the coating composition,
The coating composition according to claim 5 or 6, which is 15% by weight or less.