JPH10212436A - Coating for decoration and combination of aqueous decorative coating - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a new coating method for multicolor decorations, giving coated products enabling to safely and simply perform application works such as a coating work and an ageing work and capable of being used in stead of wall-decorating materials represented by vinyl chloride resin wall sheets (vinylic resin clothes), and to provide the combination of aqueous decorative coatings capable of being used for the coating method. SOLUTION: This combination of the aqueous decorative coatings comprises an aqueous emulation primer 1 having a relatively long dry touch drying time, scaly color flakes 2 and an aqueous emulsion clear coating 3 as a top coating. The coating method for multicolor decorations comprises coating a surface to be coated with the aqueous emulsion primer 1, sticking the scaly color flakes 2 to the surface of the applied aqueous emulsion primer 1 within the above dry touch drying time by a spraying method, and finally coating the aqueous emulsion clear coating 3 on the applied color flakes 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention can be provided in a form suitable for on-site construction of architectural wall painting, and because of its decorativeness and easy construction, a new coating which can be substituted for indoor wallpaper construction. It is about the method. The present invention also relates to a combination of water-based decorative coatings that can be used in this coating method.

[0002]

2. Description of the Related Art Conventional multi-pattern paints are commercially available in which oily particles are dispersed in an aqueous solvent and those in which aqueous particles are dispersed in an oily solvent. K 5667 multi-color paints ”and the like. However, conventional paints of this type do not always meet the needs of the current market, such as having a solvent odor and requiring a great deal of time for curing during construction.

[0003] By the way, it is no exaggeration to say that most of the construction of indoor walls, such as houses, is currently performed using wallpaper. Long before, the interior walls were mostly painted. However, after that, finishing work with wall coverings, mainly vinyl chloride wallpaper, became mainstream, and the finish by painting was reduced to only a small percentage. The reason is that the wallpaper construction process was simpler than the painting process at the time. First, apply adhesive to the wall. Put wallpaper on it. Wall surface irregularities can be appropriately hidden with wallpaper.
When the adhesive dries, the operation is completed. The curing time is simple compared to the previous painting. The wall coverings there is a textiles and paper, etc., various types but, out of shipping a total of about 745 million m ² of 1995 of wallpaper, vinyl chloride wallpaper is about 667 million m ² accounted for 89.5% of the total (reported by the Wall Covering Association). Thus, the total nationwide interior wall of houses and other buildings currently being finished with vinyl chloride wallpaper (commonly referred to as vinyl cloth) is:
It is UzutakaJo and amount to billions of m ^2.

[0004] However, recently, various symptoms referred to as sick building syndrome, sick house syndrome, or chemical hypersensitivity, such as headache, dizziness, visual abnormalities, nausea, diarrhea, atopic dermatitis, cardiac abnormalities, and unidentified complaints The emergence of new illnesses, such as one after another, has become a major social problem. It has become clear that the cause is caused by the contamination of indoor air with harmful chemicals, partly due to the improved airtightness of buildings and homes. Therefore, the disease did not begin now, and for a long time its cause was not known, and was mistaken for another disease.

The harmful chemicals that pollute indoor air include formaldehyde generated from urea-formalin adhesives used in the manufacture of plywood and the application of wallpaper, and dioctyl phthalate, a plasticizer for PVC wallpaper (vinyl cloth). Such as tris (chloroethyl) phosphate and tributyl phosphate, which are flame retardants and plasticizers for PVC, and organic phosphorus compounds such as fenitrothion and chloropyrifos, which are used as insect repellents in textiles. Researchers have found that it is present in indoor air in homes and offices.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention is directed to a new coating method which is safe for wall coverings represented by polyvinyl chloride wallpaper (vinyl cloth) and which can easily perform work such as painting and curing. And an aqueous decorative coating material that can be used in this coating method. In particular, during construction, it can cover the roughness and unevenness of the wall base material, and unlike the wallpaper, the surface can be finished seamlessly and elegantly, and it is hard to get dirt such as hand marks, so even if it gets dirty, it can be wiped off immediately It is an object of the present invention to provide a combination of water-based decorative coatings having excellent water-resistant adhesion.

[0007]

Means for Solving the Problems The inventors of the present invention have worked on the problem in order to solve the above-mentioned problems, and as a result of intensive studies, as a result, the following combination of a decorative coating method and a water-based decorative coating has been described. This has enabled a new sense of beautiful pattern finish that replaces the conventional wallpaper pasting method.

[0008] That is, the decorative coating method includes (a)
A step of applying an aqueous emulsion primer having a relatively long touch drying time to the surface to be coated; and (b) a step of spraying flaky color flakes onto the surface of the aqueous emulsion primer within the above touch drying time And (c) applying an aqueous emulsion clear paint as a top coat on the color flakes.

More specifically, as shown in FIG. 1 which is a sectional view of the decorative coating and FIG. 2 which is a surface view thereof, an aqueous emulsion primer 1 designed to keep the touch dry time relatively long. Is applied to the surface 4 to be coated such as a wall surface using a roller or the like. Next, before the coated surface of the primer 1 is dried, a flaky color flake 2 composed of a vinyl acetate / acrylic copolymer resin, an inorganic pigment and a color pigment and having an average diameter of 10 mm or less is sprayed with a special gun. After the primer 1 is dried by leaving it for an appropriate time, the excess color flakes 2 not adhered to the primer 1 are rubbed off with a brush, and finally, the aqueous emulsion clear paint 3 is
The color flakes 2 are applied from above with a roller or the like to further firmly adhere. Thereby, from the surface, the color flakes 2 of a large number of colors appear like a mosaic to create a unique texture, and as a cross-section, due to the natural unevenness of the color flakes 2, It can be decorated so that roughness and irregularities are not a concern.

[0010] The inventors of the present application have aimed at developing a simple and colorful decorative paint that replaces PVC wallpaper, and have developed a method for expressing a large number of colors by a single painting operation. Attempts have been made to apply a coating method using a pattern paint, or to apply a variety of colors by spraying color flakes of various colors from the undried coating film on the surface to be coated. Was. This method of using color flakes has a preconception that color flakes will not adhere well to vertical walls or ceilings, and that color flakes will scatter throughout the room, resulting in a very inefficient coating method. I was hugging. However, under certain conditions, it was discovered that by spraying color flakes on the wall surface coated with the water-based primer, the color flakes surprisingly adhered well to the wall surface, and that the amount of falling could be limited to just below the wall. Thus, the present invention has been completed.

In the present invention, since the aqueous emulsion primer, the color flakes and the aqueous emulsion clear coating do not contain any harmful substances, after the wall is coated, the indoor air is exposed to harmful plasticizers such as formaldehyde and organophosphorus compounds and organic compounds. There is no contamination by phosphorus-based flame retardants, insect repellents and pesticides. Further, since both the aqueous emulsion primer and the aqueous emulsion clear coating are aqueous, and the color flakes are dry flakes, they have almost no odor, and the curing is performed by masking the periphery with a masking tape.
It has a feature that it can be easily constructed by covering a floor of about 0 cm width with a curing sheet.

The combinations of the water-based decorative coating materials that can be used in the decorative coating method of the present invention include the following (a) to (c):
Shown in (a) An aqueous emulsion primer having a relatively long touch drying time (hereinafter referred to as an aqueous primer). (b) scaly color flakes applied to the surface of the aqueous emulsion primer within the above-mentioned touch drying time (hereinafter, referred to as
Color flakes). (c) A water-based emulsion clear coating as a top coat (referred to as a water-based top coat clear) applied on the color flake.

(Emulsion resin) The emulsion resin used for the aqueous primer (a) and the aqueous topcoat clear (c) used in the present invention include acrylic emulsion, vinyl acetate emulsion,
Styrene / acrylic copolymer emulsion or acrylic /
Various emulsion resins such as a vinyl acetate copolymer emulsion can be used.

The polymerizable monomers used in these emulsion resins include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate,
Examples include, but are not limited to, cyclohexyl (meth) acrylate, acrylonitrile, 2-hydroxyethyl (meth) acrylate, divinylbenzene, styrene, methylstyrene, vinyl acetate, acrylic acid, methacrylic acid, and the like.

As the emulsifier, anionic, nonionic, a combination of anionic and nonionic, cationic and amphoteric emulsifiers can be used. Examples of the anionic emulsifier include higher alcohol sulfate sodium salt, alkylbenzenesulfonic acid sodium salt, and the like. Examples of the nonionic emulsifier include polyoxyethylene alkyl allyl ether and the like, and examples of the cationic emulsifier include alkylpyridinium chloride and alkylammonium chloride. Further, a reactive emulsifier may be used. The amount of the emulsifier used is 0.01 to 1 with respect to 100 parts by weight of the polymerizable monomer.
0 parts by weight are used.

As the polymerization initiator, persulfates such as potassium persulfate, sodium persulfate and ammonium persulfate are used. In addition, for example, 2.2'-azobisisobutyronitrile, 2.2'-azobis (4-methoxy-
An azo polymerization initiator such as 2.4-dimethylvaleronitrile), an organic oxidation polymerization initiator such as benzoyl peroxide and butyl peroxide, a redox polymerization catalyst, and the like can be used.

(Water-based primer)
The aqueous primer composition (a) includes, as extender pigments, calcium carbonate, magnesium hydroxide, aluminum hydroxide, barium sulfate, mica, talc, kaolin, silicic acid, silicate, magnesium carbonate, and the like, and combinations thereof. Things are used. In addition, as the coloring pigment, titanium oxide, iron oxide, carbon black, or the like is used.

In the aqueous emulsion primer composition according to the present invention, it is necessary to appropriately adjust the touch drying time in accordance with the spray amount of the color flakes and the spraying operation time. Adjustment of the touch dry time is performed by adding ethylene glycol, propylene glycol, dibutyl diglycol, Texanol (registered trademark) (2.2.4-trimethyl-1.3-pentadiol monoisobutyrate) and a mixture thereof. Do it. The preferred addition amount is 5
Adjust the touch dry time to about 20 minutes at 10%. The method of testing The tack time, the aqueous primer was coated on a glass plate at 4mil applicator (about 30μm thickness), temperature 20 ⁰ C, to measure the tack time at 65% humidity.

(Color flakes) The color flakes used in the present invention include polymers such as vinyl acetate / acrylic copolymers, acrylic / styrene copolymers, acrylic homopolymers, polyester polymers and polyurethane polymers, and mixtures thereof. However, the present invention is not limited to the types of polymers exemplified here. In addition, the color flakes are lightweight and have a diameter of about 10
mm or less, having various colors, as long as it can adhere well to the above-mentioned aqueous primer, even if it is something other than a polymer, any thing can be adopted. . Desirable examples of the color flake include a dry flake-like flake mainly containing calcium carbonate, vinyl acetate / acrylic copolymer and a color pigment having a diameter of 6 mm or less. This color flake can be variously colored by a coloring pigment, for example, a diameter of 6 mm,
By preparing about 90 different color tones for each of the four types of 5 mm, 3 mm, and 1 mm, practically infinite combinations can be realized. It is desirable to mix the flake size distributions of various sizes, which can result in complex changes in the appearance of the painted surface. However, if too large ones are compounded, the adhesion to the water-based primer is reduced, and if too small ones are mixed, the scattering rate during construction increases, so the diameter is 0.5 to It is desirable that 80% or more of the material having a size of 5.0 mm is contained. Here, the diameter means not only the diameter of the circle but also the longest crossing length of an indeterminate type.

At the time of construction, flakes of two or more colors are mixed, and the above-mentioned water-based primer is applied to the wall surface with a roller. Before drying, a special spray gun (18 to 26 mm in diameter) is used. Spray slowly with low pressure. For example, when the diameter is 18 mm, 0.5 to 2 kg /
At a pressure of ² cm and a diameter of 26 mm, 2-4 kg / cm ²
It is desirable to keep the pressure. Spraying amount of the flakes may be approximately 200-250 g / m ^2. After the primer has dried, brush it to remove any flakes that did not adhere directly to the primer. Excess flakes that have fallen during spraying with the spray gun and during brushing fall from the wall onto a curing sheet having a width of 60 to 70 cm, which can be collected and reused.

Next, the aqueous top coat clear described below is
Finish coating with a roller from the flake surface. The painted surface thus completed becomes a three-dimensional colorful pattern with a variety of luxurious feelings depending on the type of flake. Also, unlike the wallpaper, the wall surface is hardly stained, and even if it does, it can be easily wiped off with a cloth moistened with water or a small amount of detergent.

(Aqueous Topcoat Clear) The emulsion resin used in the aqueous topcoat clear composition of the present invention can be basically the same as that of the aqueous primer. The difference is that in the case of the primer, an adjusting agent for keeping the touch dry time is added, but in the case of the aqueous top coat clear, this is not necessary. This aqueous topcoat clear
The matte clear or matte clear may be used, but in the case of matte, fine powder silica or polypropylene dispersion may be added as a matting agent in an appropriate amount according to the matte degree. The viscosity of the aqueous primer and the aqueous topcoat clear may be in the range of 100 to 200,000 cps, and particularly preferably about 20,000 to 50,000 cps.

[0023]

EXAMPLES Table 1 shows the monomer composition ratios of the synthetic resin emulsions A, B, and C used for the aqueous primer and the aqueous topcoat clear. In the description of the embodiments, parts or%
Represents parts by weight or% by weight. The unit of the numerical value of the blending amount in each table is parts by weight. The synthetic resin emulsions A, B, and C in Table 1 all have a solid content of 50% and an average particle diameter of the emulsion of 0.1 to 1 μm.

[0024]

[Table 1]

Polymerization Method (Part 1) With respect to emulsions A and B in Table 1, a polymerization reaction was carried out by the following method. A four-necked flask was equipped with a stirrer and a thermometer, and charged with 50 parts of water, 0.2 parts of sodium dodecylbenzenesulfonate, 0.8 parts of polyoxyethylene nonylphenyl ether, and 0.3 parts of potassium persulfate, and N ₂ gas. It was heated with stirring a stream under 80 ⁰ C, and the solid content after the completion of the reaction the monomers shown in Table 1 for each composition ratio is 50
% In an amount of the over 3 hours to drop react at 80 ⁰ C. It is further heated for 2 hours aging After completion of the dropwise addition 80 ⁰ C. After cooling, 0.1 part of aqueous ammonia was added, and the mixture was filtered through a 200-mesh wire net to obtain an emulsion having an average particle size of about 0.2 μm.

Polymerization Method (Part 2) Emulsion C in Table 1 was reacted under the same conditions as above, but 0.5 part of hydroxyethyl cellulose was added as a protective colloid. The reaction was carried out as described above to obtain an emulsion having an average particle size of about 0.5μ.

Aqueous primer Table 2 shows the composition of an aqueous primer prepared by using the above emulsion resins A, B, and C, and adding a pigment and various additives thereto. Although there was no difference in the performance as a coating film in Examples 1, 2, and 3, the case of Example 2 in which the touch drying time was 25 minutes was determined to be optimum in consideration of the working efficiency. The one with a touch dry time of 10 minutes was used as a top clear.

[0028]

[Table 2]

Topcoat Clearness Table 3 compares the degree of gloss using emulsion resin C with a touch-drying time of 10 minutes while adjusting the amount of matting agent. With gloss, 3 minutes, 5 minutes, no gloss, these can be used according to each purpose.

[0030]

[Table 3]

Color flakes Color flakes are 70-78% calcium carbonate,
5-20% vinyl acetate / acrylic polymer and 0.3-10
% Of dry pigment-like flakes having a diameter of 5 mm or less. The distribution of flake sizes,
It is shown in Table 4. In Table 4, the size (mm) indicates the diameter.

[0032]

[Table 4]

Test of water-based decorative paint Among the paints of Examples 1 to 7, the paint of the formula of Example 2 was used as a "water-based primer", painted with a roller, and then sprayed with "color flakes" with a special gun. The paints of Examples 4, 5, 6, and 7 having different (gloss) were applied as "water-based topcoat clear". Table 5 shows the results of tests on the completed coating film in accordance with the test items for the JIS K 5667 multicolor paint. In each case, the results were acceptable.

[0034]

[Table 5]

The multicolor paint described in JIS K 5667 is a paint in which two or more liquid or gel-like color particles are suspended in the paint. Strong solvent odor remains. Further, at the time of coating, not only spray coating, but also roller coating, droplets containing pigment are scattered, so that extensive curing is required on the floor and ceiling.

On the other hand, in the decorative coating method according to the present invention, when the color flakes are sprayed, it is only necessary to lay a curing sheet having a width of 60 to 70 cm below the wall. The color flakes dropped here can be collected and reused. No curing of the ceiling or floor is required. Also, regarding the coating film performance
It has passed the JIS K 5667 test, and it is clear that the paint according to the present invention is excellent in terms of both simplicity of work and performance.

[0037]

The first invention of the present application provides a new coating method that is safe for wall coverings represented by PVC wallpaper (vinyl cloth) and that can easily perform painting and curing work. Is what I was able to do. In particular, during construction, it can cover the roughness and unevenness of the wall base material, and unlike the wallpaper, the surface is seamless, elegant finish is possible, and dirt such as hand marks is hard to adhere, even if it gets dirty An object of the present invention is to provide a decorative coating method which is excellent in water-removable adhesion property which can be wiped off.

Further, in the second to fifth aspects of the present invention, it is possible to provide a combination of water-based decorative coating materials capable of performing the decorative coating method according to the first invention. is there.

[Brief description of the drawings]

FIG. 1 is a sectional view of a decorative coating according to the present invention.

FIG. 2 is a front view of the decorative coating of the present invention.

[Explanation of symbols]

 Reference Signs List 1 aqueous emulsion primer 2 color flake 3 aqueous emulsion clear paint 4 coated surface

Claims (5)

[Claims] (1) a step of applying an aqueous emulsion primer having a relatively long touch drying time to a surface to be coated; and (b) a scaly surface on the surface of the aqueous emulsion primer within the above touch drying time. A decorative coating method comprising: spraying color flakes to adhere; and (c) applying an aqueous emulsion clear coating as a top coat on the color flakes. (A) an aqueous emulsion primer having a relatively long touch drying time, (b) a flaky color flake applied to the surface of the aqueous emulsion primer within the above touch drying time, c) A combination of an aqueous decorative coating comprising an aqueous emulsion clear coating as a top coat applied on the color flakes described above. 3. The above-mentioned aqueous emulsion primer,
A coating composition comprising an extender pigment and titanium oxide based on a synthetic resin emulsion having a particle size of 0.1 to 1 μm, wherein the viscosity of the coating composition is 100 to 200,000 c.
ps, solid content 50-60%, touch dry time 30 μm
It takes 20 minutes or more at a temperature of 20 ° C. and a humidity of 65% at a film thickness of, and when the above-mentioned color flakes are sprayed on the primer coating film, the color flakes can be sufficiently adhered. A combination according to claim 2, characterized in that it is a water-based decorative coating. 4. The color flake is based on a resin such as vinyl acetate or acrylic resin, and is a plasticizer harmful to the human body.
It is composed of an extender pigment and / or a color pigment containing no metal such as lead and chrome, and the size of the flake is 10 m in diameter.
3. A scaly shape of m or less.
Or a combination of the aqueous decorative coatings according to 3. 5. The aqueous emulsion clear coating as the top coat is a synthetic resin emulsion having a particle diameter of 0.1 to 1 μm, and is roller-coated on color flakes adhered to the surface of the aqueous emulsion primer, The combination according to claim 2, 3 or 4, which forms a coating film which has a low odor, is hardly stained, and can be easily wiped off with a detergent even if stained.