JP6740680B2 - Method for producing patterned coating composition - Google Patents

Description

The present invention relates to a method for producing a pattern coating composition.

The surface of objects such as wall materials is often painted for the purpose of protection and decoration. Conventionally, in order to obtain a paint having a desired color tone, an inorganic or organic pigment is previously dispersed in a resin solution or a resin emulsion for the paint, and several kinds of paints having different color tones are prepared, and these are arbitrarily mixed. It was common to manufacture.
However, a paint having a desired color tone obtained by mixing a plurality of paints can obtain only a coating film produced by using only pigments having the same color, although pigments having different color tones are mixed therein. However, it was a flat single color with little change.

Therefore, there has been proposed a paint in which gel-like colored particles obtained by encapsulating an emulsion paint with a gelled film are dispersed in a dispersion medium.
Emulsion paints belong to water-based paints and have higher environmental compatibility than conventional solvent-based paints. In addition, since the colored particles are stably dispersed in the dispersion medium by encapsulating the emulsion paint with a gelled film, if several kinds of emulsion paints are used, the colored particles having different color tones are mixed and the multicolored pattern is obtained. The coating film can be formed.

As a method for producing a paint containing gel-like colored particles, for example, in Patent Document 1, an emulsion paint containing a resin emulsion, a coloring pigment, and a hydrophilic colloid-forming substance is added to a dispersion medium containing a gelling agent. A method is disclosed in which, after gelling the surface of the emulsion paint, the emulsion paint (gelled product) whose surface is gelled is subdivided while stirring with a disperser such as a dissolver.

JP, 2008-44991, A

However, since the gel-like colored particles obtained by the method described in Patent Document 1 are subdivided while being stirred by a disperser, the particle diameter tends to vary. Therefore, the gel-like colored particles have a pattern of the coating film, and it is difficult to form the pattern as designed. Furthermore, since the appearance of the coating film varies depending on the pattern, even if the content of gel-like colored particles is the same, the coating film to be formed may appear different in color tone. It was difficult to reproduce the film (color reproducibility).

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a method for producing a pattern coating composition capable of forming a coating film having a desired pattern in which variation in particle diameter of gel-like colored particles is suppressed. To do.

The present invention has the following aspects.
[1] In a method for producing a pattern coating composition containing a gelation product in which the surface of a colored coating material is gelled, a step of bringing the colored coating material into contact with a dispersion medium containing a gelling agent to gel the surface of the colored coating material, And a step of crushing the colored paint having a gelled surface in a crushing chamber provided with a discharging mechanism with a mesh.

According to the method for producing a pattern coating composition of the present invention, it is possible to produce a pattern coating composition in which variation in particle diameter of gel-like colored particles is suppressed and a coating film having a desired pattern can be formed.

It is a figure which shows an example of the crushing means used for this invention, (a) is a top view, (b) is the perspective view seen from the side. It is a figure which shows an example of a rotary blade, (a) is a perspective view, (b) is a partially expanded view of (a). It is a perspective view explaining an example of crushing of a gelled material by a rotating blade. It is a figure which shows the other example of the crushing means used for this invention, (a) is a side view, (b) is sectional drawing which follows the aa' line of (a).

Hereinafter, the present invention will be described in detail.
The method for producing a patterned coating composition of the present invention is a method for producing a patterned coating composition containing a gelled product obtained by gelling the surface of a colored coating material by bringing the colored coating material into contact with a dispersion medium containing a gelling agent.
In the present invention, the "coating of a desired pattern" means that the size and shape of the pattern of the coating are as designed, and the pattern arrangement of the coating may be regular, It may be irregular.

<Coloring paint>
Examples of the color paint include emulsion paint containing a resin emulsion, a color pigment and a hydrophilic colloid forming substance, and a chitosan-containing paint containing chitosan, a color pigment and a complex forming substance. The chitosan-containing paint is preferable in that it can impart an antibacterial effect to the coating film formed from the pattern paint composition.

(Emulsion paint)
As the resin emulsion contained in the emulsion paint, for example, polyvinyl acetate, acrylic resin, polystyrene, acrylonitrile, veova (branched fatty acid vinyl ester), natural or synthetic rubber, and emulsions of their copolymers are generally commercially available. A resin emulsion can be used. Among them, acrylic resin is preferable.

Examples of color pigments include inorganic pigments such as carbon black, titanium oxide, iron oxide, lead chromate, cadmium yellow, and cadmium red; pearlescent pigments, mica pigments, mica-coated pearlescent pigments, aluminum powder, stainless powder, and other bright pigments. And organic pigments such as phthalocyanine blue, phthalocyanine green, and quinacridone red. These color pigments may be used alone or in combination of two or more.
The content of the color pigment is preferably 0.01 to 50 parts by mass, and more preferably 0.1 to 30 parts by mass with respect to 100 parts by mass of the resin emulsion.

When the emulsion paint contains the hydrophilic colloid-forming substance, the hydrophilic colloid-forming substance reacts with the gelling agent to be described later, and the emulsion paint can be encapsulated with a gelling film.
Examples of the hydrophilic colloid-forming substance include aqueous solutions containing cellulose derivatives; poly(ethylene oxide); polyvinyl alcohol; natural polymers such as casein, starch, galactomannone, guar gum, and locust bean gum. Among them, an aqueous solution of guar gum is preferable, and the concentration of the aqueous solution is preferably 0.5 to 5% by mass, more preferably 1.0 to 3% by mass. These hydrophilic colloid-forming substances may be used alone or in combination of two or more.
The content of the hydrophilic colloid-forming substance is preferably 0.05 to 5 parts by mass, and more preferably 0.1 to 3.0 parts by mass with respect to 100 parts by mass of the resin emulsion. When the content of the hydrophilic colloid-forming substance is within the above range, a stable gelled film can be easily obtained.

The emulsion paint may optionally include extender pigments and known additives (for example, thickeners, dispersants, defoamers, preservatives, leveling agents, etc.) as optional components.
Examples of extender pigments include kaolin, barium sulfate, hydrous magnesium silicate, calcium carbonate and the like. These extender pigments may be used alone or in combination of two or more.
The content of the extender pigment is preferably 0 to 30% by mass, and more preferably 0 to 20% by mass in 100% by mass of the emulsion paint.

The emulsion paint is obtained by adding a hydrophilic colloid-forming substance to the above resin emulsion and stirring and mixing, and then adding a mixed solution of the color pigment and water and further stirring and mixing.
The content of water is preferably 40 to 90% by mass, and more preferably 50 to 80% by mass in 100% by mass of the emulsion paint.

(Paint containing chitosan)
As the chitosan contained in the chitosan-containing paint, commercially available products can be used.
Examples of the color pigment include the color pigments exemplified above in the description of the emulsion paint. These color pigments may be used alone or in combination of two or more.
The content of the color pigment is preferably 0.01 to 50 parts by mass, more preferably 0.1 to 30 parts by mass, based on 100 parts by mass of the total of chitosan, the complex-forming substance and water contained in the chitosan-containing paint. It is a department.

By containing the complex-forming substance in the chitosan-containing paint, the chitosan reacts with the complex-forming substance in water to form an ionic complex. By bringing this ionic complex into contact with the dispersion medium, the surface of the ionic complex gels and a chitosan film is formed.
Examples of the complex-forming substance include inorganic acids such as hydrochloric acid; organic acids such as acetic acid, formic acid, acrylic acid, lactic acid and malic acid. Of these, an aqueous solution of hydrochloric acid is preferable.
The content of the complex-forming substance is preferably 20 to 150 parts by mass, and more preferably 50 to 100 parts by mass with respect to 100 parts by mass of chitosan.

The chitosan-containing paint may optionally contain a resin emulsion, an extender pigment, and known additives (eg, thickeners, dispersants, defoamers, preservatives, leveling agents, etc.) as optional components. ..
Examples of extender pigments and additives include extender pigments and additives exemplified above in the description of the emulsion paint.

The chitosan-containing coating material can be obtained by adding chitosan to an aqueous solution of the above complex-forming substance, stirring and mixing the mixture, and then adding a coloring pigment, and further stirring and mixing.
The content of water is preferably 40 to 90% by mass, and more preferably 50 to 80% by mass in 100% by mass of the chitosan-containing coating material.

<Dispersion medium>
The dispersion medium is an aqueous dispersion medium containing a gelling agent.
Examples of the gelling agent include aqueous solutions containing magnesium montmorillonite clay, sodium pentachlorophenol, borate, tannic acid, titanium lactate, calcium chloride, sodium hydroxide and the like. Above all, an aqueous solution of borate is preferable when an emulsion coating is used as the colored coating, and an aqueous solution of calcium chloride is preferable when a coating containing chitosan is used. The concentration of the borate aqueous solution is preferably 0.05 to 10% by mass, more preferably 0.5 to 8% by mass. The concentration of the aqueous solution of calcium chloride is preferably 0.05 to 20% by mass, more preferably 0.1 to 10% by mass. These gelling agents may be used alone or in combination of two or more.
When an emulsion paint is used as the colored paint, the content of the gelling agent is preferably 0.05 to 5 mass% and more preferably 0.1 to 3 mass% in 100 mass% of the dispersion medium. On the other hand, when a chitosan-containing paint is used as the colored paint, the content of the gelling agent is preferably 0.1 to 5 mass% in 100 mass% of the dispersion medium, and more preferably 0.5 to 3 mass %.
When the content of the gelling agent is within the above range, a stable gelled film can be easily obtained.

The dispersion medium may optionally include extender pigments, water-soluble polymer compounds, and known additives.
Examples of the extender pigment include the extender pigments exemplified above in the description of the emulsion paint. Among them, a dispersion of hydrous magnesium silicate is preferable, and the concentration of the dispersion is preferably 0.05 to 20% by mass, more preferably 2 to 10% by mass. These extender pigments may be used alone or in combination of two or more.
The content of the extender pigment is preferably 0.05 to 10 mass% in 100 mass% of the dispersion medium, and more preferably 0.1 to 5 mass parts.

Examples of the water-soluble polymer compound include aqueous solutions containing hydroxyethyl cellulose, carboxymethyl cellulose, methyl cellulose, polyvinyl alcohol and the like. Among them, an aqueous solution of carboxymethylcellulose or methylcellulose is preferable, and the concentration of these aqueous solutions is preferably 0.1 to 5% by mass, more preferably 0.5 to 3% by mass. These water-soluble polymer compounds may be used alone or in combination of two or more.
The content of the water-soluble polymer compound is preferably 0.05 to 3% by mass, and more preferably 0.1 to 2% by mass in 100% by mass of the dispersion medium.

Examples of the additive include the additives exemplified above in the description of the emulsion paint.

The dispersion medium is obtained by adding water to a mixture obtained by stirring and mixing an aqueous solution containing a gelling agent, a dispersion containing an extender pigment, and an aqueous solution containing a water-soluble polymer compound, etc., with stirring. ..
The content of water is preferably 20 to 80 mass% in 100 mass% of the dispersion medium, and more preferably 30 to 70 mass %.

<Manufacturing method>
Hereinafter, an example of the method for producing the patterned coating composition of the present invention will be described.
The method for producing the patterned coating composition of the present embodiment has the following step (1) and step (2).

(Process (1))
The step (1) is a step of bringing the coloring paint into contact with a dispersion medium containing a gelling agent to gel the surface of the coloring paint.
The method of bringing the colored coating material into contact with the dispersion medium is not particularly limited, and examples thereof include a method of adding the colored coating material to the dispersion medium. When the colored coating material comes into contact with the dispersion medium, the surface of the colored coating material gels to form a gelled product (a colored coating material having a gelled surface).

The addition amount of the colored coating material is preferably 150 parts by mass or less, and more preferably 100 parts by mass or less with respect to 100 parts by mass of the dispersion medium. By setting the addition amount of the coloring coating material within the above range, it becomes easy to obtain gel-like colored particles having a uniform shape. The lower limit of the amount of the colored paint added is not particularly limited, but is preferably 30 parts by mass or more with respect to 100 parts by mass of the dispersion medium.

(Process (2))
The step (2) is a step of crushing the colored coating material (gelled product) whose surface is gelled in a crushing chamber provided with a discharging mechanism with a mesh.
In the step (2), for example, the gelled product is crushed by using a crushing means provided with a crushing chamber provided with a discharging mechanism with a mesh.
As the crushing method, for example, a cutting method, a hammer method, a grinder method, a pressing method or the like can be adopted.
As a crushing means adopting such a crushing method, for example, a disintegrator manufactured by Husqvarna Zenoa Co.; , Bantam Mill, Pharma Mill, Victory Mill, Fine Impact Mill, Contraplex, Lin Rex Mill, GRACIS, ACM Pulverizer, ACM Pulverizer E-ACM; Glow Engineering's Glow Mill, R&D Multi Mill, Aseptic Chopper, Chopper, Shark Mill, Vegetable Crusher, disk cutter, rotary cutter, rotary cutter mini, permut, desktop pulsarizer; supermass colloider, supermass colloider α, micromeister, micromeister mini, selenium mirror, selenium mirror DAU made by Masuko Sangyo Co., Ltd. , Atomizer, cutter mill, massomizer X, bone cutter, chopper, pulsarizer, bone crusher, food cutter; Kawata G master, rapid, super mixer; Taiheiyo Kiko Co., Ltd. spiral pin mixer, cavitron, fine -Flow mill: FM mixer, Mechano-nanohybrid, Granulation mixer granule, etc. manufactured by Nippon Coke Industry Co., Ltd. can be used.
Here, an example of crushing the gelled material will be described in detail with reference to FIG. 2 to 4 to be described later, the same components as those in FIG. 1 are designated by the same reference numerals, and the description thereof will be omitted.

1A and 1B are views showing an example of the crushing means used in the present invention, FIG. 1A is a plan view, and FIG. 1B is a perspective view seen from the side.
The crushing means 10 of this example includes a crushing chamber 11 for containing a gelled product, a crushing mechanism 12 for crushing the gelled product stored in the crushing chamber 11, and a discharging mechanism 15 for discharging the crushed gelled product from the crushing chamber 11. It has and.
The crushing chamber 11 is not particularly limited in its shape and material as long as it can store the gelled substance.

The crushing mechanism 12 of this example has a rotary shaft 13 extending from the bottom surface 11 a of the crushing chamber 11 into the crushing chamber 11, and a rotary blade 14 attached to the tip of the rotary shaft 13.
A rotary drive source (not shown) such as a motor is connected to the rotary shaft 13. By rotating the rotary shaft 13 by this rotary drive source, the rotary blade 14 can be rotated.

Further, in the crushing mechanism 12, two rotary blades 14 are attached to the rotary shaft 13 below the rotary blade 14 attached to the tip. That is, the rotary blades 14 are attached to the rotary shaft 13 in three stages.
The three rotary blades 14 are attached to the rotary shaft 13 so that the longitudinal direction thereof is deviated by 60°.
As shown in FIG. 2, the rotary blade 14 of this example includes a horizontal cutting blade 14a and a vertical vertical cutting blade 14b arranged above and below the horizontal cutting blade 14a.

The discharging mechanism 15 includes a mesh 15a and a guide portion 15b.
The discharging mechanism 15 is provided on the side surface 11b of the crushing chamber 11, and the mesh 15a also serves as a part of the side surface 11b of the crushing chamber 11.

The size (hole diameter) and shape of the mesh 15a are not particularly limited. For example, when a patterned coating composition containing a gelled product having a small particle size is produced, a fine mesh may be used.
The guide portion 15b is for preventing the gelled material that has passed through the mesh 15a from scattering around.

In the crushing of the gelled product using the crushing means 10, first, the gelled product is put into the crushing chamber 11.
The dispersion medium may be put into the crushing chamber 11 together with the gelled substance, or the gelled substance may be previously separated from the dispersion medium by filtration or the like, and only the gelled substance may be put into the crushing chamber 11. Alternatively, step (1) may be performed in the crushing chamber 11 in advance to produce a gelled product in the crushing chamber 11. When the gelled product is manufactured in the crushing chamber 11, the gelled product may be manufactured and the gelled product may be crushed at the same time.

Next, the rotary shaft 13 is rotated by a rotary drive source (not shown), so that the rotary blade 14 is also rotated. Then, as shown in FIG. 3, the gelled product G is vertically cut by the horizontal cutting blade 14 a of the rotary blade 14 and is cut left and right by the vertical cutting blade 14 b to become the subdivided gelled product g. Further, since the three rotary blades 14 are attached to the rotary shaft 13 while being displaced by 60°, the gelled substance G in the crushing chamber 11 can be efficiently stirred, and the gelated substance G can be crushed uniformly.

Among the subdivided gelled substances, the one having a particle diameter smaller than the size of the mesh 15a of the discharging mechanism 15 is passed through the mesh 15a by the centrifugal force generated by stirring to the outside of the crushing chamber 11 from the discharging mechanism 15. Emitted. The discharged gelled product is collected.
The gelled substance having a particle size larger than the size of the mesh 15a of the discharging mechanism 15 is continuously crushed until it reaches a size of passing through the mesh 15a, and then discharged from the crushing chamber 11 by the discharging mechanism 15 and collected. ..

The gelled product thus obtained, which has been subdivided and passed through the mesh 15a, is mixed with other components (for example, a resin emulsion that functions as a binder, a known additive, etc.) to form a pattern coating composition. obtain.
When crushing the gelled product, when the dispersion medium is also put into the crushing chamber 11, the dispersion medium together with the subdivided gelled product also passes through the mesh 15a and is collected together with the gelled product. This subdivided gelled product and the dispersion medium may be used as they are as a pattern coating composition, or the subdivided gelation product is separated from the dispersion medium, and only the subdivided gelation product is used in the pattern coating composition. You may use.

Examples of the resin emulsion contained in the pattern coating composition include the resin emulsions exemplified above in the description of the emulsion coating composition. Among them, acrylic resin is preferable.
The content of the resin emulsion is preferably 50% by mass or less, more preferably 20 to 40% by mass in 100% by mass of the pattern coating composition. When the content of the resin emulsion is within the above range, coating workability of the pattern coating composition is good and a coating film having good durability is obtained.
Examples of the additive contained in the pattern coating composition include the additives exemplified above in the description of the emulsion coating composition.

The patterned coating composition may contain a plurality of gel products having different color tones. A pattern coating composition containing gelled products having different color tones is also referred to as a "multicolor pattern coating composition".
When the patterned paint composition is used as a multicolored paint composition, for example, in the step (1), the second or subsequent colored paints may be brought into contact with the dispersion medium in which the gelled product of the first color is dispersed, or the number of colored paints. A dispersion medium may be prepared in accordance with the above, and one colored coating material may be brought into contact with one dispersion medium. Further, in the step (2), a plurality of gelled products having different color tones may be put into the crushing chamber at one time and crushed together, or the gelled products may be crushed separately for each color and then mixed. Good.

<Effect>
According to the method for producing a patterned coating composition of the present invention described above, a colored coating material (gelled product) whose surface is gelled is crushed in a crushing chamber provided with a discharging mechanism with a mesh. The gelled material that has been fragmented by crushing passes through the mesh and is discharged from the crushing chamber by the discharging mechanism, so that variation in the particle size of the gelled material can be suppressed. Therefore, since the pattern coating composition obtained by the present invention contains the gelled product in which the variation in particle diameter is suppressed, a coating film having a desired pattern can be formed with good reproducibility and color reproducibility is also excellent.
Further, according to the present invention, the gelled material is subdivided in order until the particle size is smaller than the mesh size of the discharging mechanism, so that the patterned coating composition can be continuously manufactured.

<Use>
The use of the patterned coating composition obtained by the present invention is not particularly limited, and it can be applied to various objects such as mortar, concrete, ceramic materials, plastic, metal, wood and paper. The coating amount of the pattern coating composition at the time of coating is not particularly limited, but it is usually preferable to coat it at 300 to 600 g/m ² . Further, the coating method is not limited, and it can be coated by a known method such as brush, trowel, roller, spray, etc., and can be dried at room temperature and heated after coating.

<Other Embodiments>
The method for producing the pattern coating composition of the present invention is not limited to the above.
For example, in the crushing means 10 shown in FIG. 1, the discharging mechanism 15 is provided on the side surface 11b of the crushing chamber 11, but it may be provided on the bottom surface 11a.
Although the rotating shaft 13 extends from the bottom surface 11a of the crushing chamber 11 into the crushing chamber 11, the rotating shaft 13 may extend from the side surface 11b of the crushing chamber 11 into the crushing chamber 11 or from the top surface 11c. It may be stretched.
The number of rotary blades 14 is not limited to three, and may be one, two, or four or more.
The rotary blade 14 is not limited to those shown in FIGS.

Further, in the crushing means 10 shown in FIG. 1, a plate-shaped rotary blade 14 is attached to the rotary shaft 13, but as shown in FIG. 4, the rotary blade 14 has a prismatic rotary blade main body 14c and its main body. It may be configured with the blade 14d attached to each surface. 4A and 4B are views showing another example of the crushing means used in the present invention, FIG. 4A is a side view, and FIG. 4B is a sectional view taken along the line aa′ in FIG. ..

The crushing means 20 shown in FIG. 4 includes a crushing chamber 11, a crushing mechanism 12, and a discharging mechanism 15.
The discharging mechanism 15 includes a curved mesh 15a and a guide portion 15b.
The crushing means 20 of this example constitutes the crushing chamber 11 by the mesh 15a and the wall 22 which is erected upward from the peripheral edge of the mesh 15a via the fixed blade 21. That is, the mesh 15 a of the discharging mechanism 15 corresponds to the bottom surface of the crushing chamber 11, and the wall 22 corresponds to the side surface of the crushing chamber 11.
The crushing mechanism 12 has a rotary shaft 13 extending from one wall (side surface) 22 of the crushing chamber 11 into the crushing chamber 11, and a rotary blade 14 attached to the tip of the rotary shaft 13.

In the crushing of the gelled product using the crushing means 20, first, the gelled product is put into the crushing chamber 11. The dispersion medium may be put into the crushing chamber 11 together with the gelled substance, or the gelled substance may be previously separated from the dispersion medium by filtration or the like, and only the gelled substance may be put into the crushing chamber 11.
Next, the rotary shaft 13 is rotated by a rotary drive source (not shown), so that the rotary blade 14 is also rotated. Then, as shown in FIG. 4, the gelled substance G is crushed by the rotary blade 14 and the fixed blade 21, and the gelled substance g finely crushed smaller than the size of the mesh 15a of the discharging mechanism 15 sequentially passes through the mesh 15a to pass through the crushing chamber. It is discharged to the outside of 11. The discharged gelled product is recovered.
The gelled substance G having a particle diameter larger than that of the mesh 15a of the discharging mechanism 15 is continuously crushed until it reaches a size of passing through the mesh 15a, and then discharged from the crushing chamber 11 by the discharging mechanism 15 and collected. It

In addition, in FIG. 4, the shape of the rotary blade main body 14c is not limited to the prismatic shape, and may be a cylindrical shape.
Further, the wall 22 may be directly erected from the peripheral edge of the mesh 15a without the fixed blade 21.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited thereto. In the examples, "part" means "part by mass" and "%" means "% by mass".

"Manufacture of colored paints"
<Manufacture of emulsion paint>
38 parts of an acrylic resin emulsion (manufactured by Nippon Acrylic Chemical Co., Ltd., "Primal AC-38") and 28.5 parts of a 1.5% aqueous solution of a nonionic guar gum derivative (solid content 0.43 part) were mixed, A mixed solution (a) was prepared.
Separately, 10 parts of titanium white as a color pigment, 1 part of an anionic polymer dispersant (manufactured by Nippon Acrylic Chemical Co., Ltd., “Orotan 731”), and 22.5 parts of water were mixed to obtain a mixed solution (b). Prepared.
The mixed solution (b) was added to the mixed solution (a) and stirred to obtain an emulsion paint.

<Manufacture of paint containing chitosan>
5 parts of chitosan was gradually added to 95 parts of a 5% aqueous solution of lactic acid and stirred for 90 minutes to prepare a chitosan solution. To 100 parts of the obtained chitosan solution, 1 part of a tea pigment was added and stirred for 20 minutes to obtain a chitosan-containing paint.

"Production of dispersion medium"
<Production of dispersion medium (1)>
To 25 parts of a 4% aqueous magnesium silicate dispersion (solid content: 1 part), 5 parts of a 5% aqueous solution of ammonium diborate (solid content: 0.25 part) and 25 parts of a 1% aqueous solution of sodium carboxymethyl cellulose ( Solid content (0.25 part) was added and mixed with stirring, and then 45 parts of water was added to dilute to obtain a dispersion medium (1).

<Production of dispersion medium (2)>
A dispersion medium (2) was obtained by mixing 50 parts of a 20% calcium chloride aqueous solution and 50 parts of a 1.5% methylcellulose aqueous solution.

"Example 1"
An emulsion paint was used as the coloring paint, the dispersion medium (1) was used as the dispersion medium, and "Shark Mill GEA-2" manufactured by Glow Engineering Co., Ltd. was used as the crushing means. The “Shark mill GEA-2” corresponds to the crushing means 10 shown in FIG. 1, and includes a crushing chamber 11, a crushing mechanism 12, and a discharging mechanism 15. The crushing mechanism 12 includes a rotary shaft 13 extending from the bottom surface 11 a of the crushing chamber 11 into the crushing chamber 11, and a rotary blade 14 attached to the tip of the rotary shaft 13. The discharge mechanism 15 includes a mesh 15a and a guide portion 15b, and is provided on the side surface 11b of the crushing chamber 11. The size of the mesh 15a is 1 mm.

To 200 parts of the dispersion medium, 100 parts of the emulsion paint was added and left for 30 seconds until the emulsion paint gelled (step (1)).
Next, the emulsion paint (gelled product) having a gelled surface and the dispersion medium were separated by filtration, and the separated gelled product was crushed by a crushing means. The crushed finer than the mesh of the discharging mechanism passed through the mesh in order, and was discharged to the outside of the crushing chamber to recover the finely divided gelled product (step (2)).
The recovered gelated product was approximately 1 mm square and had a uniform shape.

"Example 2"
A subdivided gelled product was obtained in the same manner as in Example 1 except that a chitosan-containing paint was used as the coloring paint and the dispersion medium (2) was used as the dispersion medium.
The recovered gelated product was approximately 1 mm square and had a uniform shape.

"Example 3"
An emulsion paint was used as the coloring paint, the dispersion medium (1) was used as the dispersion medium, and "Fezamil FM-1" manufactured by Hosokawa Micron Co., Ltd. was used as the crushing means. The "feather mill FM-1" corresponds to the crushing means 20 shown in FIG. 4, and the discharging mechanism 15 is composed of a curved mesh 15a and a guide portion 15b. The size of the mesh 15a is 1 mm. Further, the crushing chamber 11 is composed of the curved mesh 15a and the wall 22 which is erected upward from the peripheral edge of the mesh 15a via the fixed blade 21. The crushing mechanism 12 has a rotary shaft 13 extending from one wall (side surface) 22 of the crushing chamber 11 into the crushing chamber 11, and a rotary blade 14 attached to the tip of the rotary shaft 13.

To 200 parts of the dispersion medium, 100 parts of the emulsion paint was added and left for 30 seconds until the emulsion paint gelled (step (1)).
Next, the emulsion paint (gelled product) having a gelled surface and the dispersion medium were separated by filtration, and the separated gelled product was crushed by a crushing means. The crushed finer than the mesh of the discharging mechanism passed through the mesh in order, and was discharged to the outside of the crushing chamber to recover the finely divided gelled product (step (2)).
The recovered gelated product was approximately 1 mm square and had a uniform shape.

"Example 4"
A subdivided gelled product was obtained in the same manner as in Example 3 except that the chitosan-containing paint was used as the color paint and the dispersion medium (2) was used as the dispersion medium.
The recovered gelated product was approximately 1 mm square and had a uniform shape.

"Comparative Example 1"
An emulsion paint was used as the coloring paint, the dispersion medium (1) was used as the dispersion medium, and "Dissolver" manufactured by Inoue Seisakusho Co., Ltd. was used as the crushing means. The "dissolver" includes a crushing chamber and a crushing mechanism. The crushing mechanism includes a rotary shaft extending from the top surface of the crushing chamber into the crushing chamber, and a rotary blade attached to the tip of the rotary shaft. .. The crushing chamber has no discharge mechanism.

To 200 parts of the dispersion medium, 100 parts of the emulsion paint was added and left for 30 seconds until the emulsion paint gelled (step (1)).
Then, the emulsion paint (gelled product) having a gelled surface and the dispersion medium were separated by filtration, and the separated gelled product was crushed by a crushing means to obtain a gelled product (step (2)).
The gelled product obtained in the step (2) is mixed with a fine product of 1 mm square or less, a 1 mm square product, a 10 mm square product, and a 20 mm×3 mm string-like product. There were variations in size.

10 Crushing means 11 Crushing chamber 11a Bottom surface 11b Side surface 12 Crushing mechanism 13 Rotating shaft 14 Rotating blade 15 Discharging mechanism 15a Mesh 20 Crushing means 21 Fixed blade 22 Wall 23 Guide part G Gelated material (colored paint whose surface is gelled)
g Subdivided gel

Claims (1)

In a method for producing a pattern coating composition containing a gelled product in which the surface of a colored coating is gelled,
A step of bringing the colored coating material into contact with a dispersion medium containing a gelling agent to gel the surface of the colored coating material;
In the crushing chamber where a discharge mechanism with a mesh is provided, the step of crushing the gelled colored paint with a rotating blade ,
Have a,
The rotary blade includes a horizontal cutting edge, that consists of a vertical cutting edge of the vertical disposed above and below the horizontal cutting edge, method for producing paints composition.

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