JPH06322293A - Clayish coating - Google Patents

Abstract

PURPOSE:To provide a water-based coating packable in a plastic bag, a waterproof paper bag, etc., as easily disposable packaging containers alternative to a metallic can, a plastic can, etc., as packaging containers hard to dispose after the use thereof. CONSTITUTION:The proportion of a dispersant to a pigment and/or a filler is set to be at most the maximum value of the viscosity-depressant effect of the dispersant, or the proportion of water to be blended in a water-based coating or coating material for giving thereto a suitable viscosity is alternatively lowered. The resulting clayish product is used in combination with a dispersant separately packed. Alternatively, a powdery or granular dispersant is added to a clayish coating to produce a product. This makes a simple container usable, and hence makes the waste material easily disposable.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aqueous paint or coating material improved to a novel clay-like form (hereinafter, simply referred to as "clay-like paint"). The field of application thereof is used in the paint manufacturing industry or the paint painting industry.
In addition, it is conceivable that the packaging form will be rationalized due to changes in the form of conventional water-based paints or coating materials (hereinafter simply referred to as "paint"), simplifying product containers and reducing the amount of waste materials after use. , It can be easily recycled and the packaging cost can be reduced.

[0002]

2. Description of the Related Art A coating material has a viscosity of 1 when it is filled in a container as a product at a value of 20 ° C. or lower (hereinafter, simply referred to as “viscotester viscosity value”) by a Viscotester VT-04 manufactured by Rion Co., Ltd. The container is in the range of about 1000 poise, and the container is limited to metal cans, plastic cans, and the like. In general, such a paint is generally used by adding water or the like and stirring the mixture uniformly to adjust the viscosity to a workability.

[0003]

In general, paints have liquid or slurry-like fluidity, and therefore, when a waterproof paper bag or a plastic bag is used for packaging, external force is applied. Therefore, metal cans and plastic cans are often used as containers because stress concentrates on weak places due to its structure and is easily damaged during transportation and handling, and if damaged, the container and its surroundings are easily soiled. When such fluid paints are packed in metal cans or plastic cans to make products, the materials are likely to remain inside after use, and there are many material losses. Processing is a big issue.

[0004]

The present invention is intended to solve this problem, and can be packaged in containers such as plastic bags, waterproof paper bags, and waterproof boxes, which are packaging containers other than metal cans and plastic cans. As described above, the fluid paint is a clay-like paint.

According to the present invention, the dispersant, water, or both are reduced in the paint composition having fluidity so that the powder component is not dispersed in the paint,
Due to the limitation of fluidity due to a small amount of water, or the interaction thereof, the coating material becomes a clay-like coating material having no fluidity. Conventionally,
The amount of the dispersant added was determined by gradually adding the dispersant to the mill base consisting of the pigment, the filler, and water, and observing the change in the viscosity value. There, a dispersant was added and used in addition to the amount at which the thinning effect was maximized. The amount thereof was generally 0.3 to 3% by weight as the active ingredient amount of the dispersant, based on the solid content weight of the pigment and the filler.
The dispersant used in the present invention is a pigment or filler component 100.
The amount of the active ingredient of the dispersant is 0.3 parts by weight or less with respect to parts by weight to form a clay. The amount of the separately-added dispersant will be combined in an amount sufficient to obtain a sufficient thinning effect.
To adjust the viscosity during use, mix the set clay-like paint with a dispersant, dilute with water, and stir to obtain a workable viscosity.

In addition, in the case of a clay-like coating composition in which a dispersant is added in the form of powder after forming the clay-like composition, the viscosity can be easily adjusted by simply using water.

The clay-like paint according to the present invention can be used not only in the conventional water-based paints and water-based paints for various architectural finishes but also in newly developed water-based paints and coating materials.

The clay-like material referred to in the present invention includes soft to hard ones. Specifically, the value measured at 20 ° C. with a conical viscometer having a weight of 300 g as shown in FIG. 1 is 9 cm.
Say the following: For reference, if the viscosity of the paint is high, the viscosity value of the Viscotester is about 1000 poise,
When this is measured with a cone viscometer weighing 300 g, it is about 1
The value is 0 cm. The cone viscometer uses the depth of sinking by its own weight as the viscosity value, and the measurement is shown by the sinking depth after 1 minute after setting the tip of the cone viscometer to the surface of the measurement specimen and freeing it.

The clay-like paint used in the present invention may be used in the form of granules, pellets, tablets, flakes, dumplings, blocks, lumps and the like. The shape is not particularly limited, and any of the above-mentioned shapes is effective. However, it is preferable to select the particle size or the amount of one unit to be small, because it has the advantage of being more compatible with water and easier to stir.

The suitable viscosity value of the water-based paint or coating material referred to in the present invention is the viscosity value at the time of production, and is usually 0.1 to 1.
In the case of a thin coating material or coating material having a thickness of about mm, the viscosity value of the viscotester is 1 to 100 ps, the medium coating material or coating material of 1 to 3 mm is 100 to 600 ps, and the thick coating material or coating material of 3 mm or more is It is 200 to 1000 ps.

The dispersant to be set or added to the clay-like composition according to the present invention is used when dispersing extender pigments, coloring pigments, fillers, fibers, aggregates, etc. in water. Examples thereof include sodium acid salt, condensed naphthalenesulfonic acid ammonium salt, polycarboxylic acid ammonium salt, and the like, but not limited thereto, and any compound having a dispersing effect may be used. Further, the amount used may be an effective amount for making the clay-like viscosity suitable for coating at the time of use.

[0012]

In the clay-like paint of the present invention, by reducing the proportion of the dispersant and / or water in the conventional water-based paint, the paint becomes clay-like without fluidity. Also,
Even when the dispersant is added in the form of powder, granules or the like after being made clay-like, the paint retains the clay-like form. When water and / or a dispersant is added to these and stirred, a paint having fluidity is quickly obtained.

[0013]

EXAMPLES Next, the present invention will be described more specifically by way of examples, but the present invention is not limited to these.

Example 1 Acrylic / styrene copolymer resin emulsion (resin solid content 50%) 26 parts by weight, calcium carbonate 68 parts by weight, dispersant 0.1 part by weight, thickener 0.3 part by weight, water 5.
After thoroughly mixing 6 parts by weight of the mixture with a kneader to make a uniform architectural finish coating material, add 0.6 parts by weight of a powdery dispersant to 100 parts by weight of this and further knead to form a clay-like material. A finish coating material was obtained. Next, this is extruded with a diameter of 10 mm,
50μ thickness while making a cylindrical pellet with a length of 10mm
20 kg was filled in a polypropylene plastic bag of No. 3 to obtain a product. The performance of this finish coating material is shown in Table 1. In the test, 12 parts by weight of water was added to 100 parts by weight of the finish coating material and stirred to use.

Example 2 Acrylic resin emulsion (resin solid content 50%)
A mixture of 35 parts by weight, 35 parts by weight of calcium carbonate, 25 parts by weight of titanium dioxide, 0.4 parts by weight of a thickener, and 4.6 parts by weight of water was thoroughly stirred with a kneader to give a uniform architectural finish coating material. Then, to 100 parts by weight of this, a granular dispersant was added.
6 parts by weight were added and further kneaded to obtain a clay-like finish coating material. Next, this is 30mm in diameter and 15mm in length with an extruder.
15 kg was filled in a plastic bag made of polyethylene having a thickness of 50 μ while forming the cylindrical pellet of (3) to obtain a product. The performance of this finish coating material is shown in Table 1.
In the test, 25 parts by weight of water was added to 100 parts by weight of the finish coating material and the mixture was stirred before use.

Example 3 19 parts by weight of a water-soluble acrylic resin (having a resin solid content of 50%), 19 parts by weight of an acrylic resin emulsion (having a resin solid content of 50%), 13 parts by weight of carbon black, and 6 parts by weight of zinc phosphate. Parts, 38 parts by weight of clay, 0.1 parts by weight of a dispersant, 0.4 parts by weight of a thickener, and 4.5 parts by weight of water were thoroughly stirred with a kneader to obtain a liquid undercoat paint for automobiles. 0.5 parts of powdered dispersant to 100 parts by weight of
By weight, the mixture was kneaded to obtain a clay-like paint. Next, after making this into a spherical shape with a diameter of 20 mm with a molding machine,
20 in a polypropylene bag with a thickness of 50μ
The product was filled with kg. The performance of this paint is shown in Table 1. In the test, 20 parts by weight of water was added to 100 parts by weight of the paint, and the mixture was stirred before use.

Example 4 Acrylic resin emulsion (resin solid content 50%)
15 parts by weight, 65 parts by weight of calcium carbonate, 15 parts by weight of silica sol (solid content of 30%), 0.1 part by weight of dispersant, 0.3 part by weight of thickener, 4.6 parts by weight of water Stir well with a kneader to make a uniform building finish coating material, and then use a molding machine to make a spherical shape with a diameter of 25 mm and add 20 kg to a polypropylene plastic bag with a thickness of 50μ.
The filled product and 0.1 kg of the liquid dispersant packed in a plastic bottle were set as a product. The performance of this finish coating material is shown in Table 1. In addition, in the test, 13 parts by weight of water was added to 100 parts by weight of the set product of the clay-like paint, and the mixture was stirred and used.

Comparative Example 1 24 parts by weight of acrylic / styrene copolymer resin emulsion (resin solid content 50%), 64 parts by weight of calcium carbonate, 0.7 parts by weight of dispersant, 0.3 part by weight of thickener, water 11
A mixture of parts by weight was thoroughly stirred to form a viscous architectural finish coating material, which was then packed in a metal can. The performance of this finish coating material is shown in Table 1. In the test, 6 parts by weight of water was added to 100 parts by weight of the finish coating material, and the mixture was stirred before use.

Comparative Example 2 Acrylic resin emulsion (resin solid content 50%)
30 parts by weight, 25 parts by weight of calcium carbonate, 20 parts by weight of titanium dioxide, 0.6 parts by weight of a dispersant, 0.4 parts by weight of a thickener, and 24 parts by weight of water. It was used as a finish coating material and packed in metal cans. The performance of this finish coating material is shown in Table 1. In the test, 10 parts by weight of water was added to 100 parts by weight of the finish coating material and the mixture was stirred before use.

Comparative Example 3 15 parts by weight of a water-soluble acrylic resin (having a resin solid content of 50%), 15 parts by weight of an acrylic resin emulsion (having a resin solid content of 50%), 10 parts by weight of carbon black, and 5 parts by weight of zinc phosphate. Parts, 30 parts by weight of clay, 0.6 parts by weight of a dispersant, 0.4 parts by weight of a thickener, and 24 parts by weight of water are well agitated with a dissolver to prepare a liquid undercoat paint for automobiles, which is then put into a metal can. Stuffed. The performance of this paint is shown in Table 1. In addition, in the test, 10 parts by weight of water was added to 100 parts by weight of the coating material, and the mixture was stirred and used.

Comparative Example 4 Acrylic resin emulsion (resin solid content 50%)
15 parts by weight, 65 parts by weight of calcium carbonate, 15 parts by weight of silica sol (solid content of 30%), 0.1 part by weight of dispersant, 0.3 part by weight of thickener, 4.6 parts by weight of water Was thoroughly stirred with a kneader to form a uniform clay-like architectural finish coating material, which was then molded into a spherical shape having a diameter of 25 mm by a molding machine and 20 kg was filled in a polypropylene plastic bag having a thickness of 50 μ to obtain a product. The performance of this finish coating material is shown in Table 1. In the test, 20 parts by weight of water was added to 100 parts by weight of the finish coating material, and the mixture was stirred before use.

[0022]

[Preparation of coating film specimen and drying / curing conditions] Each material whose viscosity has been adjusted as described above is sprayed onto a slate plate using a spray gun or a tile gun. I went like. In Examples 1, 2 and 4 and Comparative Examples 1, 2 and 4, drying and curing were performed for 1 week in a chamber at a temperature of 20 ° C. and a humidity of 65%, and the coating film test was performed. In Example 3 and Comparative Example 3, after forcibly drying at 120 ° C. for 20 minutes, they were dried and aged for 1 week in a room at a temperature of 20 ° C. and a humidity of 65%, and subjected to a coating film test.

[0023]

[Items and methods for testing or examination] Economical efficiency of containers The price of containers was compared with that of metal cans. Product transportability The risk of damage during transport of each paint was evaluated. Product viscosity Measured with the conical viscometer of FIG. Ease of adjusting viscosity of product on site The product was evaluated by the ease of stirring at the time of adding water or an aqueous solution containing a dispersant in order to bring the product to a working viscosity. Adhesion of coating film Evaluation was carried out by a cross cut test of JIS K5400. Water resistance of coating film After submerging in water at 20 ° C for 7 days, the coating film wrinkles, swells, cracks,
The presence or absence of peeling was evaluated. Design property of the coating film A test body that imparts a pattern was visually evaluated.
(Examples 1, 2, 4 Comparative Examples 1, 2, 4) Openability of container Evaluation was made based on the length of the required time when the container was opened so as not to cause material loss. Treatability of the container after use It was evaluated by whether it can be easily reused, incinerated, or landfilled.

[0024]

[Table 1]

[0025]

EFFECTS OF THE INVENTION The clay-like coating material of the present invention is not completely solid but is clay-like, so that it is easy to process it into pellets, tablets, dumplings, blocks, etc. By doing so, stirring becomes easier. In addition, since the fluid form of the paint is a clay-like form,
What was packed in metal cans and plastic cans can now be packed in plastic bags, waterproof paper bags, waterproof boxes, etc. By changing to these packaging forms, post-use processing such as recycling and incineration becomes easy, and packaging costs can be reduced. Also, since it is clay-like, it hardly adheres to the inside of the container, material loss is reduced, and it is easy to take out. In the case of claim 1, if a dispersant is used together with water to dilute and stir, a paint having fluidity can be obtained more easily. In the case of claim 2, simply by diluting with water and stirring, a paint having fluidity can be easily obtained.

[Brief description of drawings]

FIG. 1 is an external perspective view of a cone viscometer, which is a measuring tool for quantifying clay in the present invention.

Claims (2)

[Claims] 1. The amount of water blended for controlling the addition ratio of the dispersant to the pigment and the filler to be equal to or less than the maximum value of the viscosity reducing effect of the dispersant, or to obtain an appropriate viscosity value of the water-based paint or coating material. Then, a clay-like composition comprising a clay-like composition and a dispersant set therein. 2. A clay-like paint comprising the clay-like composition according to claim 1 and a powder or granular dispersant added thereto.