JP2782309B2 - Improved paint or coating material - Google Patents

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"). It is used in the paint manufacturing industry or the paint painting industry. And a conventional water-based paint or coating material (hereinafter simply referred to as “paint”
Say It is conceivable to rationalize the packaging form accompanying the change in the form (1), and it is possible to simplify the product container, reduce the amount of container waste after use, facilitate recycling, and reduce packaging costs.

[0002]

2. Description of the Related Art Conventional fluid paints have a viscosity of 1 to 100 at 20 ° C. when filled into a container as a product.
The range was about 0 poise (by a bisco tester manufactured by Rion Co., Ltd.), and the containers were limited to metal cans, plastic cans, and the like. Then, such a coating material is generally used by adding water or the like at the time of use, stirring the mixture uniformly, and adjusting it to a viscosity suitable for work.

[0003]

Problems to be Solved by the Invention Generally, liquid or slurry paints have fluidity, so that when a waterproof paper bag or a plastic bag is used for packaging, an external force is applied. Metal cans and plastic cans are often used for containers because stress concentrates on weak structures and is easily damaged during transportation and handling, and when damaged, the container and its surroundings are easily soiled. When such fluid paints are packed into metal cans or plastic cans to make products, after use, the material tends to remain on the inside, there is a lot of material loss, and it is difficult to recycle because of dirt. Has become a major problem.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve this problem, and can be packaged in containers other than metal cans, plastic cans, such as plastic bags, waterproof paper bags, and waterproof boxes. In other words, the paint having fluidity is a new clay-like paint.

[0005] When a superabsorbent polymer is added to a paint having fluidity, water in the paint is absorbed by the superabsorbent polymer to increase the viscosity. The action increases the viscosity of the coating, resulting in a loss of fluidity and a new clay-like coating. The proportion of the superabsorbent polymer added in the present invention is effective when it is in the range of 0.001 to 10 parts by weight based on 100 parts by weight of the coating composition. If the addition ratio is less than 0.001 part by weight, it is 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, a clay-like coating can be obtained by simply reducing the water content in the composition of the coating, but in this case, the viscosity at the time of use is extremely difficult to be adjusted, which is not practical.

[0007] The novel paints of the present invention include conventional water-based paints, various water-based architectural finish coating materials, or newly developed water-based paints and coating materials having a product viscosity of 10 cm or more by a cone viscometer. Available for

In the method for producing a novel paint according to the present invention, the paint is stirred with a dissolver type mixer or the like, and then the superabsorbent polymer is added in an amount of 0.001 to 100 parts by weight of the paint composition.
By adding 10 parts by weight and kneading with a kneading machine or the like, it is possible to easily produce a new form of clay-like paint. As another method, a conventional paint can be produced by stirring with a dissolver type mixer or the like, and then pumping the paint together with a superabsorbent polymer to a static mixer. still,
The present invention is not limited to these as production means.

The superabsorbent polymer referred to in the present invention includes:
Starch, cellulose, polysaccharide, protein,
There are polyvinyl alcohol type, acrylic type, addition polymer type, polyether type, condensation polymer type, etc., more specifically, starch-acrylic acid graft polymer, starch-styrene sulfonic acid polymer, cellulose-acrylonitrile graft polymer , Crosslinked carboxymethylcellulose, hyaluronic acid, agarose, collagen, crosslinked polyvinyl alcohol, crosslinked sodium polyacrylate, saponified polyacrylonitrile polymer, hydroxyethyl methacrylate polymer, maleic anhydride copolymer, vinyl Examples include a pyrrolidone polymer, a polyethylene glycol diacrylate crosslinked polymer, an ester polymer, an amide polymer, and the like. However, the present invention is not limited to these specific examples. 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 water-absorbing ability of the superabsorbent polymer is less than 10 times, it becomes difficult to form a clay and cannot be used.

[0010] The clay-like material in the present invention ranges from a soft material to a hard material. Specifically, the value measured at 20 ° C. with a cone viscometer weighing 300 g as shown in FIG.
Say the following: For reference, the value of a high-viscosity coating material measured at 20 ° C. using a Viscometer Rotor No. 2 manufactured by Rion Co., Ltd. at about 20 ° C. is about 1000 poise, and this is a cone viscometer weighing 300 g. Is about 10 cm. The cone viscometer uses the depth sinked by its own weight as a viscosity value, and the measurement is represented by the sink depth one minute after setting the tip of the cone viscometer free from the surface of the sample to be measured and setting it free. The cone viscometer has a substantially conical shape with a circle diameter of 8 cm and a cone height of 15 cm. Examples of the use of this cone viscometer are described in "Fireproof Construction Method for Buildings" by Tatsuo Naito, Kashima Press,
It can be seen on pages 92 and 93 issued on August 5, 1981.

The usable form of the novel clay-like paint according to the present invention may be in the form of granules, pellets, tablets, flakes, dumplings, blocks, blocks, or the like. The shape is not particularly limited, and any of the above shapes is effective. However, it is preferable to select a smaller particle size or one unit amount, so that there is an advantage that the composition is more easily adjusted to water and easier to stir.

[0012]

In the novel coating of the present invention, the addition of the superabsorbent polymer results in a form in which the superabsorbent polymer absorbs and takes in the water in the paint components considerably. The properties of the paint also change from a liquid or slurry to an apparently concentrated state and a clay with reduced water components.

[0013]

Next, the present invention will be described more specifically with reference to examples, but the present invention is not limited thereto.

Example 1 50 parts by weight of an acrylic resin emulsion, titanium dioxide 3
A mixture of 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 thickener, and 14 parts by weight of water was thoroughly stirred with a dissolver to obtain a uniform household paint. The mixture was transferred to a kneader and 100 parts by weight of a superabsorbent polymer (manufactured by Sumitomo Chemical Co., Ltd .; Sumikagel NP-101)
0) was added and further kneaded to obtain a clay-like paint. Next, this was extruded to a diameter of 20 mm and a length of 20 mm.
After forming into a cylindrical pellet having a thickness of 5 mm, 5 kg was filled into a plastic bag made of polypropylene having a thickness of 50 μm to obtain a product. Table 1 shows the performance and the like of this paint.
In the test, 20 parts by weight of water was added to 100 parts by weight of the paint, and the mixture was stirred.

Example 2 Acrylic / styrene copolymer resin emulsion 24 parts by weight, calcium carbonate 64 parts by weight, dispersant 0.7 parts by weight,
A mixture of 0.3 parts by weight of a thickener and 11 parts by weight of water was stirred well with a dissolver to obtain a uniform building finish, and then transferred to a kneader. 100 parts by weight of a superabsorbent polymer (Mitsubishi Oil Chemicals) 1.5 parts by weight of Diawet I-400 (manufactured by Co., Ltd.) were added and kneaded to obtain a clay-like finish coating material. Next, this was extruded to a diameter of 10 mm and a length of 10 mm.
The product was filled into a plastic bag made of polypropylene having a thickness of 50 μm into 20 kg while being formed into a cylindrical pellet of mm. Table 1 shows the performance and the like of this finish coating material. In the test, 8 parts by weight of a 3% aqueous sodium chloride solution was added to 100 parts by weight of the finish coating material, and the mixture was stirred and used.

Example 3 A mixture of 30 parts by weight of an acrylic resin emulsion, 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 Was thoroughly stirred with a dissolver to obtain a uniform architectural finish, then transferred to a kneader, and 100 parts by weight of a superabsorbent polymer (Sumitomo Chemical Co., Ltd .; Sumikagel NP-1) was added.
010) was added by 1 part by weight and further kneaded to obtain a clay-like finish coating material. Next, this was extruded into cylindrical pellets having a diameter of 30 mm and a length of 15 mm, and filled into a 50-μm-thick polyethylene plastic bag at 15 kg to obtain a product. Table 1 shows the performance and the like of this finish coating material. In 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 A mixture of 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 parts by weight of a dispersant, 0.3 parts by weight of a thickener, and 10 parts by weight of water was prepared. After stirring well with a dissolver to obtain a uniform building finish, the mixture was transferred to a kneader, and 100 parts by weight of the superabsorbent polymer (Sumitomo Chemical Co., Ltd .; Sumikagel SP-51) was added.
0) was added and further kneaded to obtain a clay-like finish coating material. Next, this was shaped into a spherical shape having a diameter of 25 mm by a molding machine and filled into a 50-μm-thick polypropylene plastic bag in an amount of 20 kg to obtain a product. Table 1 shows the performance and the like of this finish coating material. In the test, water was added to 100 parts by weight of the finish coating material.
0 parts by weight were added and stirred for use.

Example 5 A mixture of 30 parts by weight of an acrylic resin emulsion, 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 Was thoroughly stirred with a dissolver to obtain a uniform architectural finish, and then transferred to a kneader. To 100 parts by weight, 7 parts by weight of a superabsorbent polymer (Nippon Synthetic Chemical Industry Co., Ltd .; Aqua Reserve GP) was added. The mixture was kneaded to obtain a clay-like finish coating material. Next, this was formed into a spherical shape having a diameter of 20 mm by a molding machine, and then 10 kg was filled into a 50 μm-thick polypropylene plastic bag to obtain a product. Table 1 shows the performance and the like of this finish coating material. In the test, 10 parts by weight of a 3% ammonium chloride aqueous solution was added to 100 parts by weight of the finish coating material, followed by stirring.

Example 6 15 parts by weight of a water-soluble acrylic resin, 15 parts by weight of an acrylic resin emulsion, 10 parts by weight of carbon black, 5 parts by weight of zinc phosphate, 30 parts by weight of clay, 0.6 part by weight of a dispersant, and a thickener A mixture of 0.4 parts by weight and 24 parts by weight of water was stirred well with a dissolver to form a liquid undercoat for automobiles, and then transferred to a kneader. 100 parts by weight of a superabsorbent polymer (manufactured by Sumitomo Chemical Co., Ltd.) ; Sumikagel NP
-1010) was added in an amount of 1 part by weight, and further kneaded to obtain a clay-like paint. Next, this was formed into a spherical shape having a diameter of 20 mm by a molding machine, and then 20 kg was filled into a 50 μm-thick polypropylene plastic bag to obtain a product. Table 1 shows the performance and the like of this paint. In the test, 20 parts by weight of water was added to 100 parts by weight of the paint, and the mixture was stirred.

Comparative Example 1 A mixture of 50 parts by weight of an acrylic resin emulsion, 5 parts by weight of calcium carbonate, 30 parts by weight of titanium dioxide, 0.6 parts by weight of a dispersant, 0.4 parts by weight of a thickener, and 14 parts by weight of water. Was stirred well to obtain a uniform household paint, which was packed in a metal can.
Table 1 shows the performance and the like of this paint. still,
In conducting 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 an acrylic / styrene copolymer resin emulsion, 64 parts by weight of calcium carbonate, 0.7 part by weight of a dispersant,
A mixture of 0.3 part by weight of a thickener and 11 parts by weight of water was thoroughly stirred to obtain a viscous finish coating material, and packed in a metal can. Table 1 shows the performance and the like of this finish coating material.
In the test, 6 parts by weight of water was added to 100 parts by weight of the finish coating material, followed by stirring.

Comparative Example 3 An acrylic resin emulsion containing 30 parts by weight, calcium carbonate 25 parts by weight, titanium dioxide 20 parts by weight, a dispersant 0.6 parts by weight, a thickener 0.4 parts by weight, and water 24 parts by weight. Was vigorously stirred to obtain a viscous architectural finish, which was packed in a metal can. Table 1 shows the performance and the like of this finish coating material. 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 and used.

COMPARATIVE EXAMPLE 4 A mixture of 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 parts by weight of a dispersant, 0.3 parts by weight of a thickener, and 10 parts by weight of water was prepared. The mixture was stirred well to form a viscous architectural finish, which was then packed in metal cans. Table 1 shows the performance and the like of this finish coating material. 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 15 parts by weight of a water-soluble acrylic resin, 15 parts by weight of an acrylic resin emulsion, 10 parts by weight of carbon black, 5 parts by weight of zinc phosphate, 30 parts by weight of clay, 0.6 part by weight of a dispersant, and a thickener A mixture containing 0.4 parts by weight of water and 24 parts by weight of water was stirred well with a dissolver to obtain a liquid undercoat for automobiles, which was then packed in a metal can. Table 1 shows the performance and the like of this paint. In the test, 10 parts by weight of water was added to 100 parts by weight of the paint, and the mixture was stirred.

Comparative Example 6 20 kg of the viscous architectural finish material of Comparative Example 2 was filled into a 50 μm thick polypropylene plastic bag to obtain a product. Table 1 shows the performance and the like of this finish material. In the test, the finish coating material 10
6 parts by weight of water was added to 0 parts by weight and stirred for use.

Comparative Example 7 The composition of Comparative Example 2 was reduced in the water content to
25 parts by weight of styrene copolymer resin emulsion, 68 parts by weight of calcium carbonate, 0.7 parts by weight of dispersant, 0.3 part of thickener
A mixture of 6 parts by weight of water and 6 parts by weight of water was sufficiently stirred and kneaded to obtain a clay-like architectural finish coating material and packed in a metal can. Table 1 shows the performance and the like of this finish coating material. In the test, 12 parts by weight of water was added to 100 parts by weight of the finish coating material, and the mixture was stirred.

[0027]

[Preparation of coating 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, drying and curing were performed for one week in a room at a temperature of 20 ° C and a humidity of 65%, and the coating film test was performed. Example 6 and Comparative Example 5 were forcibly dried at 120 ° C. for 20 minutes, then dried and cured in a room at a temperature of 20 ° C. and a humidity of 65% for one week, and subjected to a coating film test.

[0028]

[Items and Methods of Testing or Examination] Container Economy The price of containers was compared with that of metal cans. Product transportability The risk of breakage during transport of each paint was evaluated. Product viscosity Measured with the cone viscometer of FIG. Ease of Viscosity Adjustment of Product at Site In order to make the product use viscosity, predetermined water or aqueous solution was added and stirred, and evaluation was made based on ease of stirring at that time. Adhesion of the coating film It was evaluated by a grid test according to JIS K 5400. Water resistance of coating film After submersion in water at 20 ° C for 7 days, the coating film becomes wrinkled, blistered, cracked,
Evaluation was made based on the presence or absence of peeling. Specimen of the coating film The test piece for imparting a pattern was visually evaluated.
(Examples 2 to 5 and Comparative Examples 2 to 4 and 6) Opening property of container Evaluated according to the length of time required when the container was opened so as not to cause material loss. Disposability of used containers The evaluation was made based on whether it could be easily reused, incinerated, landfilled, etc.

[0029]

[Table 1]

[0030]

Since the paint of the present invention is not completely solid but clay-like, it can be easily processed into pellets, tablets, dumplings, blocks, and the like. Makes stirring easier. In addition, since a conventionally fluid composition becomes a clay-like composition,
What has been packed in metal cans and plastic cans can be packed in plastic bags, waterproof paper bags, waterproof boxes, and the like. By changing to these packaging forms, processing after use 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, the material loss is reduced, and the container can be easily taken out. At the time of use, if diluted with water in the same manner as before, it becomes a paint having fluidity. It should be noted that, when diluted with a solution in which an electrolyte substance is dissolved, a paint having fluidity can be obtained more easily.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a conical viscometer, a measuring tool for quantifying clay-like state in the present invention.

Claims (1)

(57) [Claims] 1. An improved paint or coating material characterized by adding a superabsorbent polymer to an aqueous paint or coating material to make it clay-like.