JPH01172475A - Coating composition for forming rugged surface - Google Patents

Abstract

PURPOSE:To make it possible to form a rugged surface having a large number of very steep recessions and excelling in decorative function and moisture permeability, by adding hydrated gel particles to a film-forming composition. CONSTITUTION:The title composition is obtained by adding 5-500wt.% hydrated gel particles (B) of a water content of 50-99wt.%, such as a spherical hydrated gel of a particle diameter of 0.1-5mm or a W/O dispersed hydrated gel of a particle diameter of 1-1,000mum to a film-forming composition (A) which is a water-based paint such as a casein paint, a water-based urea resin paint or a synthetic emulsion paint or an oil-based paint such as a boiled oil-based paint, a natural resin oil-based paint or a cellulose oil-based paint. The surface appearance of a paint film obtained by applying this composition to a painting substrate varies according to the particle diameter of component B. That is, when this particle diameter is large, the appearance is like that of a crater resembling a sand wall pattern in which the protrusions are turned into recessions, while the appearance becomes leather-like, mat-like, or suede-like as the diameter is decreasing, and the surface has microscopic ruggedness through it is glossy to the eye when the diameter is the smallest.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The coating composition of the present invention has excellent decorative properties and moisture permeability, and is therefore useful for beautifying and protecting buildings and articles.

(Prior art) Film-forming compositions, so-called paints, are used to coat buildings, etc. to enhance their beauty, and to protect buildings from deteriorating over time. It is applied to the skin to improve its aesthetic value.

BACKGROUND ART Conventionally, in order to improve the aesthetic appearance, paint has been used to form uneven surfaces, but there are many methods for doing so, each of which has its own drawbacks.

In other words, when a paint mixed with aggregate such as sand or lint is applied by spray, roller, or brush, the aggregate in the paint becomes more concentrated like sand over time during storage. Aggregates settle, and those with low specific gravity like No4-Lite float to the surface, so if the stirring before application is insufficient, the distribution of aggregate will be uneven at the beginning and end of the coating. It is difficult to obtain a uniformly uneven surface with different surfaces, and spray painting often causes clogging.In addition, when such a paint is used, a surface consisting of many concavities such as dimples on the surface of the proof surface can be seen. In addition, there are disadvantages such as a decrease in the strength, elongation, and adhesion of the coating film.

Another method is to add a water-soluble resin such as polyvinyl alcohol or methyl cellulose or a thickener such as bentonite to the paint to give it structural viscosity, and then apply the paint with a roller to form an uneven surface. In addition to streaks appearing in the direction of rolling, the height of the convex part or the depth of the concave part is small, the shape is round and gentle, and there are no sharply uneven surfaces.

Another method is to use a roller engraved with an uneven pattern to paint the mold, but in addition to the problem of having to use such special painting tools,
The drawback is that the seams of the patterns are difficult to match.

Furthermore, in order to prevent deterioration of the building block, which is another purpose of the paint, it is also important to control the moisture content in the building block, and therefore, it is also an important requirement that the coating film be moisture permeable.

When a non-moisture-permeable paint film is formed on a building, the water vapor contained inside the building structure cannot be released, resulting in condensation due to temperature differences, which can cause the wood in the building structure to rot. Mold, etc. may have formed. In particular, in the winter, the water freezes on the north wall, destroying the concrete, etc., and the water inside tries to release, causing blistering and peeling of the paint film, causing the problem that the protection of the building structure becomes ineffective. Therefore, moisture permeability (according to JIS Z0208) of 100 j'/m'', 24 hours or more is required.

In addition, conventional coatings are moisture permeable and lack luster.
Shiny ones lack moisture permeability9.

For this reason, fillers such as clay, charcoal, and silica powder have traditionally been added to paints, but instead of providing insufficient moisture permeability, the strength, elongation, and adhesion of the paint film is improved by adding fillers. However, there were drawbacks such as a significant decrease in gloss, etc., and poor storage stability such as filler sedimentation during storage.

(Problems to be Solved by the Invention) It is an object of the present invention to provide a paint that solves the various drawbacks of conventional paints that can form uneven surfaces and that provides moisture permeability to the coating film necessary as a protective paint.

(Means for Solving Problems) The present invention provides a coating composition for forming an uneven surface comprising a film-forming composition and water-containing gel particles having a water content of 50 to 99 weight duck; Hydrogel particles with a water content of 50 to 99% by weight are added to a coating composition for forming a nine-irregular surface and a film forming composition. Diameter 1~10
This is a coating composition for forming an uneven surface containing 5 to 5 ounces of 00 μm square-shaped dispersed hydrogel fine particles.

This coating composition (cloudy glaze) can be applied by ordinary spray, roller, brush, etc., and forms a coating film with a surface consisting of many extremely sharp recesses and excellent moisture permeability. Can be done.

(Description of composition) The film-forming composition used in the present invention includes water-based paints such as casein paint, urea resin-based water-based paint, or synthetic resin emulsion paint, boiled oil-based oil-based paint, natural resin-based oil-based paint, or Oil-based paints such as synthetic resin-based oil-based paints such as melamine resin paints, I-lipinyl-based paints, polyester-based paints, and silicone resin-based paints, lacquers, and cellulose-based oil-based paints such as acetyl cellulose paints.

Examples of hydrogel particles include agar gel, carainan gel,
Calcium aluminate gel, gelatin glu, polyvinyl alcohol, acetoacetylated-rivinyl alcohol,
Acetoacetylated starch, acetoacetylated hydroxyethylcellulose, polyacrylamide and its derivatives, -lyacrylic acid, polyvinylpyrrolidone, inbutylene-maleic anhydride copolymer and its derivatives, vinyl ether-maleic anhydride copolymer, etc., as a crosslinking agent. Water-containing glue particles dropped into a solution, heated and dissolved and dropped into a cold solvent to form spherical water-containing glue particles, or pulverized lumps of the glue or water-containing resin glue into granules with a water content of 50 to 9
Glue particles containing 9% by weight of water are used.

The particle size of these particles is approximately 0.1 to 5 mm,
It is suitable for making cosmetic paints, and it is suitable for making paints that form crater-like or ricin-like surfaces with a large number of depressions.

- If even finer glue particles are desired, spider-shaped dispersed water-containing glue particles are effective. After emulsifying the aqueous glue-forming resin as described above into a water-in-oil type (WO type),
Either perform a gluing treatment such as adding a crosslinking agent to form a hydrous gel microparticle-type dispersion, or emulsify water-soluble monomers, which will become an aqueous glu-forming resin when polymerized, in a water-in-oil type with a crosslinking agent. By polymerizing and internally crosslinking, a W10 type dispersion of hydrogel fine particles can be obtained.

The particle size of the finely dispersed water-containing glue particles thus obtained is 1 .mu.m to 1.000 .mu.m, and particles of 100 .mu.m or less are particularly suitable for making moisture-permeable paints. Also,
Particles with a particle size of 5 to 500 μm are suitable for forming an uneven surface, but those with a particle size of 5 to 100 μm are particularly suitable for forming a suede-like surface, and those with a particle size of 50 to 500 μm are suitable for forming a reso-2 type uneven light surface. .

The coating composition for forming an uneven surface of the present invention includes spherical water-containing glue, crushed particles of water-containing glue, or water-containing glue microparticles dispersed in a W-shaped shape in the above-mentioned water-based paint or oil-based paint.
By mixing 500'X parts and stirring uniformly, the mixture can be divided.

In addition, in the oil-based paint, water-based glue-forming resin water bath liquid and W/
1) The coating composition for forming an uneven surface of the present invention can also be prepared by adding a fi emulsifier and a crosslinking agent, stirring, emulsifying, and crosslinking.

In this way, the film-forming composition can be packaged in water-containing glue particles to form a two-component coating composition for forming an uneven surface, which is mixed at the time of use.

To form an uneven surface using the coating composition for forming an uneven surface of the present invention, apply it to an appropriate coating base (for example, wood, concrete, cement mortar, slate) using a painting tool such as a spray, roller, or brush. When applied to the surface of , ALC, metals, plastics, textiles, non-woven fabrics, paper, leather, etc., after drying, the moisture in the water-containing glue particles evaporates and shrinks, forming an uneven surface with many depressions. Ru.

When the particle size is relatively large, the surface becomes crater-like or ricin-like, with the protrusions of the sand wall pattern reversed into four parts; as the particle size becomes smaller, the surface becomes leather-like, matte-like, and At its thinnest, it looks like suede, and even though it looks shiny to the naked eye, it forms a microscopic uneven surface.

A feature of the present invention is that the shape of the recess is extremely sharp.

This is because water-containing glue particles with a water content of 50 to 99 weight duck are used, so they collapse sharply due to evaporation of water.

Therefore, water-containing glue particles with a water content of less than 50% by weight do not exhibit this effect.

On the other hand, from the viewpoint of moisture permeability, when the moisture contained in the water-containing glue particles evaporates, the film thickness at the bottom of the recesses formed in the coating film is not thin, and the moisture contained in the structure becomes water vapor. It is thought that the water passes through this thin bottom membrane and radiates to the outside.

Therefore, the amount of water-containing glue particles to be included in the paint is preferably 5% by weight or more; if it is less than 5% by weight, neither an excellent uneven surface nor moisture permeability can be obtained, and if it exceeds 500% by weight, the coating film performance will be significantly impaired. It is not practical as it deteriorates.

When blending water-containing glue particles into water-based paints, water-containing glue particles dispersed in a W2O type can be mixed as is, but in the case of water-containing glue particles that are not dispersed in a W2O type, it is best to treat them with water repellency before blending them, resulting in extremely sharp shapes. Recesses are formed, and the pattern becomes even clearer when colored glue is used.

In addition, in the case of using the above-mentioned two-component coating composition for forming an uneven surface, 1. For example, first, the film-forming composition is applied to the base material, and then the water-containing glue particles are sprayed onto the undried surface. It is also possible to form an uneven surface by applying the same.

(Effects) When a film is formed using the coating composition capable of forming an uneven surface of the present invention, the following excellent effects are exhibited.

An uneven surface with many extremely sharp recesses is obtained, and depending on the size of the hydrogel particles contained, the surface can vary from a sand wall-like surface with many recesses to a leather-like, suede-like, or matte-like surface, and can be used to form patterns. Since no aggregate is used, the surface is soft to the touch and will not cause scratches or scratches on the human body.

The desired uneven surface can be created simply by applying with a regular paint tool, such as a spray, roller, or brush.
No clogging of spray. Since the specific gravity of the hydrogel particles is close to that of the paint, or can be made close to that of the paint,
Hydrogel particles do not settle or float over time,
It can always be painted in good condition.

The film formed using the coating composition capable of forming an uneven surface of the present invention has extremely good moisture permeability, so when applied to the surface of a building frame, it prevents condensation inside the frame, thereby preventing the growth of mold, decay of the frame, or A coating film with both gloss and moisture permeability that does not cause damage to the building structure due to freezing and does not cause spraying or peeling of the coating film can be obtained.

(Example) Next, the present invention will be described with reference to production examples, examples, and comparative examples.

Production example 1 (spherical hydrogel) The following solution A was heated to 50°C and dropped into solution B through the tip of a syringe needle to form a spherical gel.Then, this spherical gel was thoroughly washed with water to form granules. Spherical hydrogel particles having a diameter of 2 to 3 fi and a water content of about 98% by weight were obtained.

Solution A: 2% sodium alginate aqueous solution 1001B
Liquid: 2% calcium chloride aqueous solution 1,0001
I Production Example 2 (Hydrous gel crushed particles) The following mixed solution was poured into a container and left at room temperature for 24 hours to obtain a lumpy gel. Next, the gel was pulverized with a mixer to obtain colorless pulverized hydrogel particles having a particle size of 1 to 5 tax s and a water content of about 86% by weight.

Production Example 3 Water-containing duck glue particles of 1 to 2 tm and a water content of about 98 weight were obtained.

Production Example 4 After emulsifying and dispersing 70 parts by weight of a 10% by weight aqueous solution of polyvinyl alcohol in 30 parts by weight of xylene using a hook-shaped emulsifier, 2 parts by weight of a 10% by weight aqueous solution of glutaraldehyde were added dropwise without stirring. After the dropwise addition, stirring was continued at room temperature for 3 hours to crosslink and glue the emulsified and dispersed fine particles, and the j? A dispersion of water-containing glucose particles containing 70% by weight of ribinyl alcohol-containing glucose particles was obtained.

Production Example 5 60 parts by weight of a 15% by weight aqueous solution of polyvinyl alcohol was emulsified and dispersed in 40Ii parts of toluene using a monomer dispersant, and then 3 parts by weight of a 10% by weight aqueous solution of glutaraldehyde was added dropwise with stirring. After the dropwise addition, stirring was continued at room temperature for 5 hours to crosslink and gel the emulsified and dispersed fine particles, and the toluene contained 60% by weight of 4-rivinyl alcohol-containing hydrogel particles with a particle size of 100 to 1000 μm and a water content of 85%. A dispersion of hydrogel microparticles was obtained.

Production Example 6 The same procedure as Production Example 4 was performed, except that a 10% by weight aqueous solution of acetoacetylated polyvinyl alcohol was used instead of the 10% by weight aqueous solution of polyvinyl alcohol, and paint thinner was used instead of xylene. Similarly, acetoacetylated I-rivinylalnyl hydrated particles with a particle size of 5 to 30 μm and a water content of 90% by weight were added to paint thinner.
A dispersion containing 0% by weight of water-containing gel particles was obtained.

Production Example 7 A 4% by weight aqueous solution of carrageenan was prepared at 70°C, and W1
Using a type 0 emulsifier, add dropwise into xylene at 70°C to emulsify and disperse, gradually cool to room temperature, and add particle size 5 to xylene.
Hydrogel microparticles W1 containing 40% by weight of hydrous carrageenangle microparticles with a diameter of ~30 μm and a water content of 96% by weight
A type 0 dispersion was obtained.

Production Example 8 A mixed aqueous solution consisting of 10% by weight of acrylamide, 0.5% by weight of methylenebisacrylamide, and 89.5% by weight of water. i part of boiling point 1 of dissolved W10 emulsifier
Dropped and dispersed in 150 parts by weight of petroleum hydrocarbon at 90°C,
After dispersion, the temperature was raised to 70°C, a 10% by weight aqueous solution of ammonium persulfate was added, and a polymerization reaction was carried out for 3 hours. Then,
The mixture was cooled to room temperature to obtain a hydrous gel microparticle-type dispersion in which 25% by weight of hydrated preacrylamide particles having a particle size of 1 to 30 μm and a water content of 90% by weight were contained in a solvent.

Example 1 20 parts by weight of the spherical hydrous gel particles obtained in Production Example 1 were mixed with 100 parts by weight of a thick film white water-based paint containing titanium oxide mixed with a styrene-acrylic copolymer emulsion to prepare a paint for forming an uneven surface. did.

When this was sprayed on a slate board with a spray gun to a coating thickness of 3 nm, the dried coating surface showed an uneven pattern with many circular depressions scattered in the shape of craters in a continuous white coating. .

Example 2 A paint for forming an uneven surface was prepared by mixing 30M parts of the crushed water-containing glue particles obtained in Production Example 2 with 100 parts by weight of an outdoor white water-based paint containing an acrylic polymer emulsion blended with titanium oxide.

When this was applied to a slate board using a roller at a coating amount of 200 II/m'', the dry coated surface had a soft texture and a glue-like appearance.

Example 3 100 parts by weight of floor paint) was added with the round ball film thickness I obtained in Production Example 1.
When the paint was sprayed with a spray gun so that the paint was dry, the dried paint surface had many crater-like recesses in the continuous floor paint film.9.

Example 4 The outdoor white water-based paint used in Example 2 was sprayed onto a slate board with a spray gun so that the coating amount was 2001/W@'', and the paint obtained in Production Example 1 was applied to the entire surface of the undried state. Spherical hydrous gel particles were sprayed with a spray gun so that the particle size was 401/fn''.

The dried coating surface showed a concavo-convex pattern with many inverted dome-shaped depressions scattered on the white continuous coating film.

Example 5 Using an acrylic polymer emulsion as a film forming material, 30 parts by weight of the W10 type dispersion of hydrous gel particles prepared in Production Example 4 was mixed with 100 parts by weight of an elastic thick film paint to prepare a paint for forming an uneven surface. did.

Example 6 20 parts by weight of the water-containing gel fine particles and ridge-shaped dispersion prepared in Production Example 7 were mixed with 100 parts by weight of a solvent-based glossy paint (pigment volume concentration 20%) using acrylic resin as a film-forming material to form irregularities. A paint for surface formation was prepared.

Example 7 In Example 6, acrylic-styrene copolymer emulsion was used as a film-forming material instead of the solvent-based glossy paint using acrylic resin as a film-forming material.Example 8 Two-component curable urethane resin was used to form a film. A paint material was prepared.

The 60' gloss of the paint film formed using this paint is 15, which is much lower than the gloss of 95 for the paint film formed using the original paint. The appearance of the coating showed a reso-like pattern with an excellent sense of luxury and volume.

Example 9 Nine paints 10 using solvent-based baking type melamine resin as film forming material
A coating material for forming an uneven surface was prepared by mixing 150 parts by weight of the water-containing glue fine particle W10 type dispersion prepared in Production Example 5 with 0 parts by weight. The coating film formed by baking this paint on a steel plate at 150 DEG C. for 30 minutes had a high-quality feel and volume with subtle particles dispersed in the melamine resin layer, and exhibited the following pattern.

Example 10 Acrylic solvent-based gloss paint used in Example 6 100ff
20 parts by weight of a 10 wt % aqueous solution of acetoacetylated polyvinyl alcohol, 2 parts by weight of a 5 wt % aqueous solution of glutaraldehyde, and stirred to emulsify, and further stirred at room temperature for 3 hours. Subsequently, fine particles of the acetoacetylated-livinyl alcohol aqueous solution emulsified and dispersed are cross-linked and gelled, and directly added to a commercially available paint with a particle size of 5 to 50.
μm moisture content 90 weight duck hydrogel fine particles about 17 weight 5
An uneven surface-forming paint containing and dispersing was prepared.

Regarding Comparative Test Examples 5 and 6.7, its moisture permeability, coating film gloss, and film strength were compared with commercially available water-based and solvent-based moisture permeable paints.
Compared to glossy paint.

The results were as shown in Table 1.

Table 1 As described above, by adjusting the particle size and blending amount of the gel, the moisture permeability can be increased without reducing the gloss of the coating film.

Claims (1)

[Scope of Claims] 1. A coating composition for forming an uneven surface comprising a film-forming composition and hydrogel particles having a water content of 50 to 99% by weight. 2. A coating composition for forming an uneven surface comprising a film-forming composition containing 5 to 500% by weight of hydrogel particles having a water content of 50 to 99% by weight. 3. The coating composition for forming a crater-like or ricin-like uneven surface according to claim 1 or 2, wherein the hydrogel particles have a particle size of 0.1 to 5 mm. 4. For forming an uneven surface, the coating-forming composition contains 5-500% by weight of W/O type dispersed hydrogel fine particles having a water content of 50-99% by weight and a particle size of 1-1000 μm as hydrogel particles. Coating composition. 5. The particle size of the W/O type dispersed hydrogel fine particles is 5 to 500.
The coating composition for forming a leather-like, matte or suede-like uneven surface according to claim 4, wherein the coating composition has a diameter of .mu.m. 6. The particle size of the W/O type dispersed hydrogel fine particles is 1 to 100
The coating composition for forming a moisture-permeable uneven surface according to claim 4, wherein the coating composition has a diameter of .mu.m.