JP3056018B2 - Paint or coating material that combines electrolytes - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a novel form of water-based paint or coating material (hereinafter simply referred to as "new paint"). As an application field, all industries using a water-based paint or coating material (hereinafter, simply referred to as “paint”) can be considered. And, by using the novel paint of the present invention, it is possible to rationalize the packaging form, simplify the product container, reduce the amount of container waste after use, facilitate recycling, and reduce the packaging cost. And the viscosity can be easily adjusted when using the paint.

[0002]

2. Description of the Related Art Conventional fluid paints have a viscosity of 1 to 1 at 20 ° C. when filled in a container as a product.
Approximately 000 poise (by a bisco tester manufactured by Rion Co., Ltd.). Such conventional paint containers have been limited to metal cans, plastic cans and the like. In general, such a coating material is used by adding water or the like at the time of use and uniformly stirring the mixture so as to obtain a workable viscosity.

[0003]

[Problems to be Solved by the Invention] The conventional paint has a fluid property, and when a plastic bag is used for packaging, when an external force is applied, stress concentrates on a structurally weak place. However, the container is likely to be damaged during transportation or storage, and if damaged, the container or its surroundings will be soiled. To avoid this danger, the container is limited to metal cans, plastic cans, etc. It was the current situation. Fluid paints filled in metal cans, plastic cans, etc., tend to have material left inside after use, causing a large amount of material loss and dirt that makes it difficult to recycle containers. Had become.

[0004]

SUMMARY OF THE INVENTION In order to solve the problem that it is difficult to treat a container after use with a paint having fluidity, the present invention is intended to add a superabsorbent polymer to a clay-like material. New paint. This makes it possible to package in a plastic bag, a waterproof paper bag, a waterproof box, etc., which are packaging containers other than metal cans and plastic cans. However, if simply used as is, the problem of container treatment after use can be solved, but it takes a little time to stir for viscosity adjustment at the time of use. Therefore, a novel coating material is combined with and / or added with an electrolyte so that the water absorbed by the superabsorbent polymer can be smoothly released at the time of kneading.

[0005] The novel paint according to the first aspect of the present invention is obtained by adding the following superabsorbent polymer in an amount of 0.001 to 10 parts by weight to 100 parts by weight of the paint to form a clay. The following electrolytes are combined in the range of 0.01 to 10000 parts by weight with respect to 100 parts by weight of the superabsorbent polymer.

[0006] One form of the combination is a product comprising a new paint made into a clay state by adding a superabsorbent polymer and an aqueous solution in which an electrolyte is dissolved to make the viscosity suitable for work easily at the time of use. This product uses an electrolyte solution as a viscosity modifier in addition to a new clay-like paint. By mixing and agitating the electrolyte solution, the viscosity can be adjusted more easily during use. In this case, the combination of products can be considered as a form of a new paint product in which a clay-like new paint filled in a plastic bag, a waterproof paper bag, etc. and a tetra-pack-like waterproof paper container filled with an electrolyte solution are set. Can be

[0007] Another form of the combination is a novel paint made into a clay by adding a superabsorbent polymer, and a product in which an electrolyte for easily obtaining a workable viscosity at the time of use is set as a powder or granules. . In this case, the particle size of the electrolyte is not particularly limited, but the finer the electrolyte, the quicker the dissolution and the more convenient the use. This product is used by sprinkling an electrolyte on a new clay-like paint at the time of use and then adding water for viscosity adjustment and stirring, or dissolving the electrolyte in water and adding it and stirring. This makes it easier to adjust the viscosity during use. In this case, the combination of the products may be in the form of a new paint product in which a clay-like new paint filled in a plastic bag, a waterproof paper bag, or the like, and a waterproof paper bag filled with an electrolyte are set.

[0008] Claim 2 of the present invention is a novel clay-like paint obtained by adding an electrolyte to a composition made into a clay with a superabsorbent polymer. In this product, water for viscosity adjustment is simply added to a new clay-like paint and stirred when used. This makes it easier to adjust the viscosity during use. In this case, the packaging form of the product may be a form of a new paint product in which a plastic bag, a waterproof paper bag, or the like is filled with a clay-like new paint.

[0009] The addition of an electrolyte as referred to in the present invention means that an electrolyte is added to a clay-like new paint and kneaded to make a uniform product, the surface of the clay-like new paint is sprayed with the electrolyte, or simply in the same package. Say to put both.

The term "clay-like" as used in the present invention refers to a paint containing a superabsorbent polymer, from soft to hard. Specifically, a cone viscometer weighing 300 g as shown in FIG. Means a value measured at 20 ° C. of 9 cm or less. For reference, a high-viscosity paint among conventional paints was used for 20
The value measured at ℃ is about 1000 poise,
When this is measured with a cone viscometer weighing 300 g, about 1
The value is 0 cm. The cone viscometer uses the depth of sinking under its own weight as a viscosity value, and the measurement is set by setting the tip of the cone viscometer to just below the surface of the test sample, leaving it free, and expressing it by the sinking depth one minute later. . The cone viscometer has a substantially conical shape, a circle diameter of 8 cm and a cone height of 15 cm.
It has become. An example using this cone viscometer can be found in "Fireproof Coating Method for Architecture", written by Tatsuo Naito, Kashima Shuppan, pages 92 and 93, issued August 5, 1981.

The superabsorbent polymers referred to in the present invention include:
Starch, cellulose, polysaccharide, protein,
There are polyvinyl alcohol type, acrylic type, addition polymer type, polyether type, condensation polymer type, etc., and 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 thereof include a pyrrolidone polymer, a polyethylene glycol diacrylate crosslinked polymer, an ester polymer, an amide polymer, and the like, but are not specifically limited thereto. If Oite more than 10 times its 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 that of pure water, it will hardly become clay and cannot be used.

The term "electrolyte" as used in the present invention refers to a substance whose aqueous solution has electric conductivity and exhibits an electrolysis phenomenon at both electrodes when passing a direct current, and includes a strong electrolyte and a weak electrolyte. Specifically, calcium chloride, potassium chloride, sodium chloride, magnesium chloride, aluminum chloride, cobalt chloride, ammonium chloride, sodium hydrogen carbonate, ammonium nitrate, aluminum nitrate, potassium bromate,
Although sodium hydroxide and the like can be exemplified, the present invention is not particularly limited and any substance can be used as long as it meets the definition of ordinary electrolyte. Usually, one of these electrolytes is used alone or in combination.

[0013]

Next, the operation mechanism of the present invention will be described. The inventor of the present invention has conducted intensive studies to make it easier to adjust the viscosity of a paint made into a clay with a superabsorbent polymer during use.As a result, it was found that the viscosity can be adjusted promptly by applying an electrolyte. Have found and completed the present invention. The mechanism of action is that when water is added to the electrolyte, it becomes ionized and becomes an aqueous solution containing ions such as sodium ions and calcium ions, and it functions as a highly water-absorbing polymer that absorbs a large amount of water in clay-like paint. Lower. The viscosity decreases due to the interaction between the contraction of the superabsorbent polymer due to the decrease in the function of the superabsorbent polymer and the accompanying release of water. This makes it possible to quickly adjust a paint having a fluidity from a clay state.

When the electrolyte is combined with the novel clay-like coating material, it can take the form of claim 1 or 2.
All of these can be packaged in plastic bags, waterproof paper bags, waterproof synthetic paper containers, etc., instead of the metal cans and plastic cans used for conventional paints, thereby reducing container costs and containers after use. Waste material treatment can be made easier.

Claim 1 is a combination of a novel clay-like paint and an electrolyte solution or an electrolyte such as powder or granules. Claim 2 is a combination of a novel clay-like paint and an electrolyte. The action is also caused by the aforementioned ionization of the electrolyte.

[0016]

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)
2) was added and further kneaded to obtain a clay-like household paint. Next, this was formed into a cylindrical pellet having a diameter of 20 mm and a length of 20 mm using an extruder.
5 kg was filled in a polypropylene plastic bag. This and a 3% calcium chloride aqueous solution filled with 0.4 kg into a tetrapack were set as a product.
Table 1 shows the performance and the like of this paint. still,
In the test, 0.4 kg of a set of an aqueous electrolyte solution was added to 5 kg of the paint, and the mixture was stirred and used.

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.
20 kg was packed into a 50 μm thick polypropylene plastic bag while being formed into a cylindrical pellet of mm. 1.6k of this and 3% aqueous sodium chloride solution in Tetra Pak
The product filled with g was set as a product. Table 1 shows the performance and the like of this finish coating material. In the test, 1.6 kg of the set aqueous electrolyte solution was added to 20 kg 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, 15 kg of this was packed into a 50 μm thick polyethylene plastic bag while forming it into a cylindrical pellet having a diameter of 30 mm and a length of 15 mm using an extruder.
A plastic container filled with this and 75 g of potassium chloride was made into a product. Table 1 shows the performance and the like of this finish coating material. When the test was performed, the electrolyte 75 of the set was applied to 15 kg of the finish coating material.
g, sprinkled with 1.5 kg of water, and stirred for use.

Example 4 A mixture of an acrylic resin emulsion (12 parts by weight), calcium carbonate (65 parts by weight), silica sol (12 parts by weight), a dispersant (0.7 parts by weight), a thickener (0.3 parts by weight) and water (10 parts by weight) 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 filled into a 50-μm-thick polypropylene plastic bag while being formed into a spherical shape having a diameter of 25 mm by a molding machine. This was combined with 100 g of a plastic bag filled with sodium chloride to make a product. Table 1 shows the performance and the like of this finish coating material. In the test, the finishing coating material 2 was used.
0 g of the set was sprinkled with 100 g of electrolyte, and 2 kg of water was further 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. After kneading to obtain a clay-like finishing coating material, 5 parts by weight of sodium carbonate was further added to 100 parts by weight, and the mixture was uniformly kneaded, and the mixture was formed into a spherical shape having a diameter of 20 mm by a molding machine. 10 kg was filled into a 50 μm polypropylene plastic bag to obtain a product. Table 1 shows the performance and the like of this finish coating material. In the test, 1 kg of water was added to 10 kg of a clay-like finishing coating material to which an electrolyte was added, and the mixture was stirred and used.

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
After adding 1 part by weight of -1010) and kneading to obtain a clay-like paint, the mixture is formed into a spherical shape having a diameter of 20 mm by a molding machine, and further, 1 part by weight of disodium phosphate is added to 100 parts by weight. The dusted product was filled into a plastic bag made of polypropylene having a thickness of 50 μm and filled with 20 kg to obtain a product.
Table 1 shows the performance and the like of this paint. still,
In conducting the test, 2 kg of water was added to 20 kg of a clay-like paint to which an electrolyte was added, and the mixture was stirred and used.

Comparative Example 1 In Example 1, the viscosity was adjusted during use by using only water without using an electrolyte. Table 1 shows the performance and the like of this paint. In addition, when conducting the test, paint 5k
1 kg of water was added to g, and the mixture was stirred and used.

Comparative Example 2 In Example 3, the viscosity was adjusted during use by using only water without using an electrolyte. Table 1 shows the performance of this finish coating material.
It was as follows. In the test, 3 kg of water was added to 15 kg of the finish coating material, and the mixture was stirred and used.

COMPARATIVE EXAMPLE 3 In Example 5, the experiment was carried out using only water without using the added electrolyte before molding into a spherical shape . Table 1 shows the performance and the like of this finish coating material. In the test, 2 kg of water was added to 10 kg of the finish coating material, followed by stirring.

Comparative Example 4 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 parts by weight of a thickener and 11 parts by weight of water was thoroughly stirred to obtain a viscous building finish coating material, and 20 kg was filled in a steel square can. Table 1 shows the performance and the like of this finish coating material. In the test, 4 kg of water was added to 20 kg of the finish coating material, followed by stirring.

[0027]

[0028]

[Preparation of coating specimen and drying / curing conditions] Each material whose viscosity has been adjusted as described above is sprayed on a slate plate using a spray gun or a tile gun. I went like In Examples 1 to 5 and Comparative Examples 1, 2, 4, and 5, drying and curing were performed in a room at a temperature of 20 ° C. and a humidity of 65% for one week, and the coating film test was performed. Example 6 and Comparative Example 3 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.

[0029]

[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 on 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. 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, Comparative Examples 2 to 5) Openability of Container When the container was opened so as not to cause material loss, evaluation was made based on the length of required time. Disposability of used containers The evaluation was made based on whether it could be easily reused, incinerated, landfilled, etc.

[0030]

[Table 1] Evaluation criteria in Table 1 ：: good, Δ: normal, ×: bad.

[0031]

The electrolyte of the present invention is combined and / or
Or, with the added clay-like new paint products, conventional paints packed in metal cans, plastic cans, etc. can be packed in plastic bags, waterproof paper bags, etc., and the inside of the packaging is hardly soiled, so it is recycled and incinerated. And the like can be easily processed after use, and the cost of packaging can be reduced. In addition, the action of the electrolyte facilitates viscosity adjustment during use.

[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.

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Claims (2)

(57) [Claims] 1. A combined paint or coating material comprising a water-based paint or coating material made into a clay state by adding a superabsorbent polymer, and a separate packaging unit in which an electrolyte is in a solution state or an undissolved state. Wood. 2. A paint or coating material comprising an electrolyte previously added to a water-based paint or coating material made into a clay by adding a superabsorbent polymer.