JPH06293869A - Improved coating or coating material - Google Patents

Abstract

PURPOSE:To make a liquid or slurry coating change into a new type clayey coating or coating material so as to enable the packaging in a packaging container such as a readily treatable plastic bag, a waterproof bag, etc., in place of a metallic can, a plastic can, etc., in which the disposal of the packaging container after use is difficult. CONSTITUTION:This coating material capable of changing a liquid or slurry material into a clayey coating or clayey coating material is used by adding a highly water absorbing polymer in an amount of 0.001-10 pts.wt. based on 100 pts.wt. liquid or slurry coating or coating material. Thereby, a simple container can be used and the disposal of waste materials is simplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water-based paint or coating material improved to a novel form (hereinafter, simply referred to as "new paint"). The field of application thereof is used in the paint manufacturing industry or the paint painting industry. Then, there are conventional water-based paints or coating materials (hereinafter, simply “paint”).
Say It is considered that the packaging form can be rationalized in accordance with the change in the form (1), and the product container can be simplified to reduce the waste material of the container after use, facilitate recycling, and reduce the packaging cost.

[0002]

2. Description of the Related Art A conventional fluid paint has a viscosity of 1 to 100 at 20 ° C. when it is filled in a container as a product.
It was in the range of about 0 poise (by Visco Tester manufactured by Rion Co., Ltd.), and the container was limited to metal cans, plastic cans, and the like. Then, such a paint is generally used by adding water or the like and uniformly stirring it at the time of use to adjust the viscosity to a workability.

[0003]

Generally, liquid or slurry-like paints have fluidity, and therefore when a waterproof paper bag or plastic bag is used for packaging, external force is applied. Since the stress concentrates on weak places due to its structure, it easily breaks during transportation and handling, and when it breaks, the container and its surroundings are easily soiled, so metal cans and plastic cans are often used as containers. 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 is a lot of material loss. Is a big problem.

[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 new clay-like paint.

When a superabsorbent polymer is added to a paint having fluidity, the water in the paint is absorbed by the superabsorbent polymer to increase its viscosity, and the viscosity of the superabsorbent polymer is increased by mutual expansion. By the action, the viscosity of the coating material increases, and as a result, the fluidity is lost and a new clay-like coating material is obtained. The addition ratio of the superabsorbent polymer in the present invention is effective when it is in the range of 0.001 to 10 parts by weight with respect to 100 parts by weight of the coating composition. If the addition ratio is less than 0.001 part by weight, it becomes difficult to form a clay, and if it exceeds 10 parts by weight, it becomes difficult to adjust the viscosity during use.

In addition to the present invention, it is possible to make the clay-like paint by simply reducing the water content in the paint composition, but in this case it is not practical because the viscosity adjustment during use is very difficult.

The novel coating material of the present invention is a conventional water-based coating material, various water-based architectural finish coating materials, or newly developed water-based coating materials and coating materials having a product viscosity of 10 cm or more as measured by a cone viscometer. Available against.

The method for producing a novel coating material of the present invention comprises stirring the coating material with a dissolver type mixer and the like, and then adding 0.001 to 100 parts by weight of the superabsorbent polymer to 100 parts by weight of the coating composition.
By adding 10 parts by weight and kneading with a kneading machine or the like, it is possible to easily produce a novel clay-like coating material. As another method, a conventional coating composition can be prepared by stirring the coating composition with a dissolver type mixer or the like and then pumping it together with the superabsorbent polymer to a static mixer. still,
The present invention is not limited to these as a manufacturing means.

The superabsorbent polymer referred to in the present invention includes
Starch-based, cellulose-based, polysaccharide-based, protein-based,
There are polyvinyl alcohol type, acrylic type, addition polymer type, polyether type, condensation polymer type and the like, and more specifically, starch-acrylic acid graft polymer, starch-styrene sulfonic acid polymer, cellulose-acrylonitrile graft polymer. , Cross-linked carboxymethyl cellulose, hyaluronic acid, agarose, collagen, polyvinyl alcohol cross-linked polymer, sodium polyacrylate cross-linked, polyacrylonitrile polymer saponification product, hydroxyethyl methacrylate polymer, maleic anhydride copolymer, vinyl Pyrrolidone-based polymers, polyethylene glycol / diacrylate cross-linked polymers, ester-based polymers, amide-based polymers and the like can be exemplified, but not limited to specific examples, and the water-absorption capacity of the superabsorbent polymer is pure water. As long as it absorbs water more than 10 times its own weight can be used in the methods of the present invention. Usually 100
A resin having a water absorption capacity of up to 1000 times is used. If the superabsorbent polymer has a water absorption capacity of less than 10 times, it cannot be used because it tends to become clay-like.

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, a paint with a high viscosity is measured with a Visco Tester rotor No. 2 manufactured by Rion Co., Ltd. at 20 ° C., and the value is about 1000 poise. This is a conical viscometer with a weight of 300 g. When measured by, the value is about 10 cm. The cone viscometer uses the depth of sinking by its own weight as a viscosity value, and the measurement is expressed by the sinking depth after 1 minute after setting the tip of the cone viscometer to the surface of the sample to be measured and then freeing it. The cone viscometer has a substantially conical shape with a circle diameter of 8 cm and a cone height of 15 cm. An example of using this conical viscometer is "Takeo Naito, Fireproof Coating Method for Building", Kashima Press,
It can be found on pages 92 and 93 issued on August 5, 1981.

The clay-like novel coating material of 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.

[0012]

In the novel coating material of the present invention, by adding the superabsorbent polymer, the superabsorbent polymer absorbs and absorbs the water contained in the coating composition. The properties of the coating material change from liquid or slurry state to apparently concentrated state or clay state with reduced water content.

[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 resin emulsion 50 parts by weight, titanium dioxide 3
After mixing 0 parts by weight, 5 parts by weight of calcium carbonate, 0.6 parts by weight of a dispersant, 0.4 parts by weight of a thickening agent, and 14 parts by weight of water with a dissolver, the mixture was mixed well to form a uniform household paint. The mixture was transferred to a kneader, and 100 parts by weight of this super absorbent polymer (Sumitomo Chemical Co., Ltd .; Sumikagel NP-101) was added.
0) was added in an amount of 2 parts by weight and further kneaded to obtain a clay-like coating material. Then, using an extruder, this is 20 mm in diameter and 20 mm in length.
After making a cylindrical pellet of mm, 5 kg was filled in a polypropylene plastic bag having a thickness of 50 μm to obtain a product. 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 2 24 parts by weight of acrylic / styrene copolymer resin emulsion, 64 parts by weight of calcium carbonate, 0.7 parts by weight of dispersant,
Thickener 0.3 parts by weight and water 11 parts by weight were mixed well with a dissolver to form a uniform building finish coating material, which was then transferred to a kneader. 100 parts by weight of this super absorbent polymer (Mitsubishi Oil 1.5 parts by weight of Dia Wet I-400) manufactured by Co., Ltd. was added and further kneaded to obtain a clay-like finish coating material. Next, this is 10 mm in diameter and 10 mm in length with an extruder.
While making 20 mm cylindrical pellets, 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, 8 parts by weight of a 3% sodium chloride aqueous solution was added to 100 parts by weight of the finish coating material, and the mixture was stirred before use.

Example 3 A mixture of acrylic resin emulsion 30 parts by weight, calcium carbonate 25 parts by weight, titanium dioxide 20 parts by weight, dispersant 0.6 parts by weight, thickener 0.4 parts by weight, and water 24 parts by weight. Was thoroughly stirred with a dissolver to give a uniform architectural finish coating material, which was then transferred to a kneader. 100 parts by weight of this super absorbent polymer (Sumitomo Chemical Co., Ltd .; Sumikagel NP-1
010) was added by 1 part by weight and further kneaded to obtain a clay-like finish coating material. Next, while this was formed into a cylindrical pellet having a diameter of 30 mm and a length of 15 mm by an extruder, 15 kg was filled in a polyethylene 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 addition, in applying to the test, the finish coating material 10
20 parts by weight of water was added to 0 parts by weight and stirred for use.

Example 4 12 parts by weight of acrylic resin emulsion, 65 parts by weight of calcium carbonate, 12 parts by weight of silica sol, 0.7 parts by weight of dispersant, 0.3 parts by weight of thickener, and 10 parts by weight of water were used. After thoroughly stirring with a dissolver to make a uniform architectural finish coating material, it was transferred to a kneader and 100 parts by weight of this super absorbent polymer (Sumitomo Chemical Co., Ltd .; Sumikagel SP-51
0) was added in an amount of 0.1 part by weight and further kneaded to obtain a clay-like finish coating material. Next, 20 kg of this was filled in a polypropylene plastic bag having a thickness of 50 μ while forming a spherical shape having a diameter of 25 mm with a molding machine to obtain a product. The performance of this finish coating material is shown in Table 1. In addition, when using the test, 2 parts of water was added to 100 parts by weight of the finish coating material.
0 parts by weight was added and the mixture was stirred and used.

Example 5 A mixture of acrylic resin emulsion 30 parts by weight, calcium carbonate 25 parts by weight, titanium dioxide 20 parts by weight, dispersant 0.6 parts by weight, thickener 0.4 parts by weight, and water 24 parts by weight. Was thoroughly stirred with a dissolver to form a uniform architectural finish coating material, which was then transferred to a kneader. To 100 parts by weight of this was added 7 parts by weight of a super absorbent polymer (Nippon Gosei Kagaku Kogyo Co., Ltd .; Aqua Reserve GP). The mixture was kneaded to obtain a clay-like finish coating material. Next, this was molded into a spherical shape having a diameter of 20 mm by a molding machine, and then 10 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, 10 parts by weight of a 3% aqueous solution of ammonium chloride was added to 100 parts by weight of the finish coating material, and the mixture was stirred before use.

Example 6 Water-soluble acrylic resin 15 parts by weight, acrylic resin emulsion 15 parts by weight, carbon black 10 parts by weight, zinc phosphate 5 parts by weight, clay 30 parts by weight, dispersant 0.6 parts by weight, thickener. A mixture of 0.4 parts by weight and 24 parts by weight of water was thoroughly stirred with a dissolver to form a liquid undercoating for automobiles, which was then transferred to a kneader. 100 parts by weight of this super absorbent polymer (manufactured by Sumitomo Chemical Co., Ltd. ; Sumikagel NP
-1010) was added by 1 part by weight and further kneaded to obtain a clay-like coating material. Next, this was made into a spherical shape having a diameter of 20 mm by a molding machine, and then 20 kg was filled in a polypropylene plastic bag having a thickness of 50 μ to obtain a product. 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.

Comparative Example 1 Acrylic resin emulsion 50 parts by weight, calcium carbonate 5 parts by weight, titanium dioxide 30 parts by weight, dispersant 0.6 parts by weight, thickener 0.4 parts by weight, water 14 parts by weight. Was stirred well to form a uniform household paint and packed in a metal can.
The performance of this paint is shown in Table 1. still,
In the test, 10 parts by weight of water was added to 100 parts by weight of the paint, and the mixture was stirred and used.

Comparative Example 2 24 parts by weight of acrylic / styrene copolymer resin emulsion, 64 parts by weight of calcium carbonate, 0.7 parts by weight of dispersant,
A thickening agent (0.3 parts by weight) and water (11 parts by weight) were mixed well to obtain a viscous architectural finish coating material, which was 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 3 Acrylic resin emulsion 30 parts by weight, calcium carbonate 25 parts by weight, titanium dioxide 20 parts by weight, dispersant 0.6 parts by weight, thickener 0.4 parts by weight, water 24 parts by weight. Was thoroughly stirred to form a viscous architectural finish coating material, which was filled in a metal can. 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 4 A mixture containing 12 parts by weight of an acrylic resin emulsion, 65 parts by weight of calcium carbonate, 12 parts by weight of silica sol, 0.7 part by weight of a dispersant, 0.3 part by weight of a thickener, and 10 parts by weight of water. The mixture was well stirred to give a viscous architectural coating material, which was then packed in a metal can. The performance of this finish coating material is shown in Table 1. In addition, in the test, 8 parts by weight of water was added to 100 parts by weight of the finish coating material, and the mixture was stirred and used.

Comparative Example 5 Water-soluble acrylic resin 15 parts by weight, acrylic resin emulsion 15 parts by weight, carbon black 10 parts by weight, zinc phosphate 5 parts by weight, clay 30 parts by weight, dispersant 0.6 parts by weight, thickener. A mixture of 0.4 parts by weight and 24 parts by weight of water was well stirred with a dissolver to prepare a liquid undercoat paint for automobiles, which was filled in a metal can. 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 6 20 kg of the viscous building finish coating material of Comparative Example 2 was filled in a plastic bag made of polypropylene having a thickness of 50 μ to obtain a product. Table 1 shows the performance of the architectural coating material. In addition, in applying to the test, the finish coating material 10
6 parts by weight of water was added to 0 parts by weight and stirred.

COMPARATIVE EXAMPLE 7 The composition of Comparative Example 2 was prepared by reducing the water content to obtain acrylic.
Styrene copolymer resin emulsion 25 parts by weight, calcium carbonate 68 parts by weight, dispersant 0.7 parts by weight, thickener 0.3
A mixture of 1 part by weight and 6 parts by weight of water was thoroughly stirred and kneaded to obtain a clay-like architectural finish coating material, which was packed in a metal can. 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.

[0027]

[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 to 5 and Comparative Examples 1 to 4, 6 and 7, the film was dried and aged for 1 week in a chamber at a temperature of 20 ° C. and a humidity of 65% and subjected to a coating film test. In Example 6 and Comparative Example 5, after forced drying at 120 ° C. for 20 minutes, drying and curing were performed for 1 week in a room at a temperature of 20 ° C. and a humidity of 65%, and the coating film test was performed.

[0028]

[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 viscosity adjustment of product on site The prescribed water or aqueous solution was added to the product in order to make it a usable viscosity, and the product was stirred, and the ease of stirring at that time was evaluated. Adhesion of coating film Evaluation was carried out by a cross cut test of JIS K5400. Water resistance of coating film After submerging in 20 ° C water for 7 days, the coating film wrinkles, swells, cracks,
It was evaluated by the presence or absence of peeling. Design property of the coating film A test body that imparts a pattern was visually evaluated.
(Examples 2 to 5, Comparative Examples 2 to 4 and 6) Openability of Containers Evaluation was made based on the length of the required time when the container was opened so as to prevent material loss. Treatability of the container after use It was evaluated by whether it can be easily reused, incinerated, or landfilled.

[0029]

[Table 1]

[0030]

EFFECTS OF THE INVENTION Since the coating material of the present invention is not completely solid but clay-like, it can be easily processed into pellets, tablets, dumplings, blocks and the like, and such processing is also possible. Makes it easier to stir. Also, since the conventional fluid form becomes a clay-like composition,
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. At the time of use, if it is diluted with water as in the conventional case, it becomes a paint with fluidity. It should be noted that a coating material having fluidity can be more easily obtained by diluting with a solution in which an electrolyte substance is dissolved.

[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 (1)

[Claims] 1. An improved paint or coating material, which comprises adding a superabsorbent polymer to a water-based coating material or coating material to form a clay.