JP5106498B2 - Water-based paint composition and interior decoration method using water-based paint composition - Google Patents

Description

  The present invention relates to a water-based coating composition and an interior method using the water-based coating composition, and more specifically, a mineral powder excellent in concentration reducing effect, humidity conditioning effect, water retention effect, deodorizing effect and the like of a volatile organic compound. The present invention relates to a water-based coating composition as a main component and an interior method using the water-based coating composition.

  In recent years, a sick house syndrome in which a volatile organic compound contained in a building material or paint used indoors volatilizes in a space such as a room and is harmful to health has been a problem. And in order to solve these problems, various building materials and coating materials are developed, for example, the coating composition as described in patent document 1 is known.

  On the other hand, mineral powders such as igneous rocks are known to have an effect of reducing the concentration of volatile organic compounds, a humidity control effect, a water retention effect, a deodorization effect, and the like, and are described in Patent Document 2 and Patent Document 3. As described above, coating compositions utilizing these properties have been developed.

JP 2007-23244 A JP 2004-323641 A JP 2003-342529 A

However, the coating composition described in Patent Document 1 does not contain formaldehyde, which is considered to be the main cause of sick house, but contains an organic solvent such as butanol.
In addition, since synthetic resins such as epoxy resins and acrylic resins are used, these resins also contain an organic solvent as a solvent.
Therefore, these organic solvents do not affect the sick house syndrome at all, and there is a problem that the concentration reducing effect of the volatile organic compound is not sufficient.

  On the other hand, although the coating composition described in Patent Document 2 uses minerals such as igneous rocks, a specific composition such as what kind of compound is used for the binder is not disclosed. It is unclear whether the concentration reducing effect of the volatile organic compound can be expressed.

  Furthermore, although the coating composition of patent document 3 utilizes mineral powder and the specific composition is disclosed, organic solvents, such as isopropanol, are contained. In addition, an emulsion resin containing an organic solvent is also used in the binder, and, as in Patent Document 1, these organic solvents do not affect the sick house syndrome at all, but the concentration of the volatile organic compound. There is a problem that the reduction effect is not sufficient.

In addition, as in the paint compositions disclosed in Patent Document 2 and Patent Document 3, when a mineral powder such as igneous rock and a synthetic resin are mixed to form a paint, the performance of the synthetic resin is limited to the base material. Although the adhesion is good, since the coating film surface is covered with a synthetic resin, there is a problem that the mineral powder is not oriented on the coating film surface and the concentration reducing effect of the volatile organic compound cannot be fully exhibited. .
And, if the amount of the synthetic resin is decreased in order to orient the mineral powder on the surface of the coating film, there is a problem that the adhesion to the base material is deteriorated or the mineral powder is detached from the coating film. Become.

  The present invention has been made in view of the above-described conventional problems, and the main component is a mineral powder having a concentration reducing effect of a volatile organic compound, etc., and adhesion from a base material to a base material An object of the present invention is to provide a water-based coating composition that prevents dropping off and has an excellent concentration reducing effect, humidity conditioning effect, water retention effect, and deodorizing effect of a volatile organic compound.

In order to achieve the above object, a water-based paint composition according to claim 1 of the present invention is a water-based paint composition containing a mineral powder as a main component, and A) natural pozzolana as a mineral powder, and B) poly It contains starch as an alcohol, and C) water, wherein the natural pozzolana is 30 to 98% by weight of the solid content of the aqueous coating composition, and the starch is 1 to 3% of the solid content of the aqueous coating composition. The composition is 2% by weight .

The water-based paint composition according to claim 2 of the present invention is configured to be coated using the water-based paint composition according to claim 1 .

  The water-based coating composition of the present invention requires a mineral powder containing Si2O or / and Al2O3 or / and TiO2, a polyalcohol, and water, and is composed of these components. Provided is a water-based coating composition that can be oriented on the surface of the base material, has an excellent concentration reducing effect on the volatile organic compound, a humidity control effect, a water retention effect, and a deodorizing effect without impairing the adhesion to the base material. be able to.

  The water-based coating composition of the present invention can be prepared by using inorganic materials such as silica sand, ocher, cold water sand, meteorite, vermiculite, diatomaceous earth, titanium oxide, calcium carbonate, talc, clay, barium sulfate, iron oxide, and phthalocyanine. Organic materials such as azo-type, azo-type, anthraquinone-type, quinacridone-type, and imidazolone-type can be used.

  In addition, the water-based coating composition of the present invention can also use lightweight aggregates such as sawdust, soot, and pearlite in order to improve the humidity control property and reduce the weight of the coating film.

  Furthermore, the water-based coating composition of the present invention is generally used in coating compositions, including antioxidants, preservatives, fungicides, leveling agents, thickeners, antifoaming agents, ultraviolet absorbers, light Additives such as stabilizers, dispersants, emulsifiers, wetting agents and the like can be used as appropriate.

  Next, each component which comprises the water-based coating composition of this invention is demonstrated.

(Mineral powder)
The mineral powder used in the water-based paint composition of the present invention is not particularly limited as long as it is a mineral powder having an effect of reducing the concentration of volatile organic compounds. For example, natural pozzolana, igneous rock, volcanic rock, plutonic rock, granite, andesite, Examples include basalt, serpentine, peridotite, amphibolite, and diorite.

  Of these, natural pozzolans, igneous rocks, volcanic rocks, plutonic rocks, and granite are preferably used because they have a strong concentration reducing effect on volatile organic compounds. From the viewpoint of having, natural pozzolans are preferably used.

  In addition, these mineral powders may use only 1 type, and may mix and use 2 or more types of mineral powder as needed.

  The blending amount of the mineral powder is not particularly limited as long as a coating film can be formed by the polyalcohols described below, but the performance of the mineral such as the concentration reduction effect of the volatile organic compound is more effectively expressed. Therefore, it is preferable that the solid content of the water-based coating composition be 30% by weight or more.

  Here, when the compounding quantity of mineral powder is less than 30 weight% of solid content of a water-system coating composition, there exists a possibility that the density | concentration reduction effect of a volatile organic compound may become low.

  The particle size of the mineral powder is not particularly limited as long as the coating amount can be formed by the polyalcohols described below in the same manner as the blending amount, but is 0.1 mm or less in order to improve the coating operation. It is preferable.

(Polyalcohols)
The polyalcohol used in the water-based coating composition of the present invention can orient the above mineral powder on the coating surface without being covered with the coating film of the polyalcohol when the coating film is formed. If it is, it will not specifically limit, For example, a natural product type substance and a synthetic type compound are mentioned.

  Examples of natural substances include polysaccharides such as starch, amylose, amylopectin, cellulose, chitin, and pectin. Moreover, about these polysaccharides, the polysaccharide obtained by the hydrolysis process of starch like nitrocellulose and acetylcellulose can also be used.

  Synthetic compounds include glycols such as ethylene glycol, propylene glycol, diethylene glycol, and polyethylene glycol; glycerins such as glycerin, diglycerin, triglycerin, tetraglycerin, and polyglycerin; and polyhydroxys such as polyvinyl alcohol and polyallyl alcohol. Examples include acrylates.

  Of these, polysaccharides such as starch, amylose, amylopectin, cellulose, chitin, and pectin are preferably used from the viewpoint of having a strong film-forming ability (binding power) in a small amount, and further using any organic solvent. In view of this, it is preferable to use natural starch.

  In addition, these polyalcohols may use only 1 type and may mix and use 2 or more types of polyalcohols as needed.

  Regarding the blending amount of the polyalcohols, the mineral powder can be oriented on the surface of the coating film without being covered with the coating film of the polyalcohol when the coating film is formed, and the base material and the coating film or the coating material are coated. Although it is not particularly limited as long as the adhesion between the mineral powders in the film can be secured, from the point of improving the tackiness (stickiness) after the coating film formation and preventing the mineral powder from falling off the coating film, It is preferable that it is 1.0 to 2.0 weight% with respect to solid content of a water-system coating composition.

  Here, when the blending amount of the polyalcohol is less than 1.0% by weight with respect to the solid content of the aqueous coating composition, the mineral powder falls off from the coating film, and the solid content of the aqueous coating composition If the amount exceeds 2.0% by weight, the tackiness after forming the coating film is deteriorated and the coating film may be sticky.

  In addition, the form of these polyalcohols is particularly limited as long as the surface of the coating film is not covered with the coating film of the polyalcohol when the coating film is formed, and the mineral powder can be oriented on the coating film surface. However, as described below, it is preferable to use a powder or particulate material in consideration of workability during transportation, workability during painting, and the like.

  In addition, about other physical properties, such as molecular weight of polyalcohol, if it is a range which can form a coating film with the polyalcohol mentioned below similarly to a compounding quantity, it will not specifically limit.

(water)
The amount of water used in the water-based paint composition of the present invention is not particularly limited, and can be appropriately determined in consideration of the working conditions and working environment at the time of painting.

  As for the water mixing method, a water-based coating composition can be prepared by mixing and stirring all the components constituting the present invention in a predetermined container, but the powder form is more workable during transportation. In view of the fact that it is better and mixing water at the site of painting work is better at the time of painting, only mineral powder and polyalcohol powder are mixed in advance, and at the site of painting work It is preferable to prepare a water-based coating composition by mixing water.

  In addition, when only mineral powder and polyalcohol powder are mixed in advance, the water-based paint composition does not become non-uniform, for example, when the water-based paint composition is prepared by mixing water at the site of the painting work. Therefore, it is preferable to stir the mixture of mineral powder and polyalcohol powder again before mixing with water, and then mix and stir water.

(Interior method using water-based paint composition)
The interior method using the water-based coating composition of the present invention is not particularly limited as long as it is a method capable of forming the water-based coating composition of the present invention into a coating film. Brush, plastering, roller, air spray gun, airless spray Various coating methods such as gun and ricin gun can be used, but it is preferable to apply plastering or lysing gun because of the nature of the water-based coating composition of the present invention mainly composed of mineral powder.

  Here, when brush coating or roller coating is selected, since the water-based coating composition of the present invention contains mineral powder as a main component, the blending amount of polyalcohols is reduced or repeated coating is performed. Otherwise, a coating film cannot be formed, and even if a coating film can be formed, the amount of polyalcohols is small, so that the adhesion to the substrate may be reduced. Further, when an air spray gun or an airless spray gun having a small diameter is selected, there is a possibility that the water-based paint composition of the present invention may cause clogging of the gun.

  Also, as an interior method using the water-based paint composition of the present invention, if there is a risk of cracking of the paint film after painting, such as when painting on a newly constructed plaster board, gypsum board, etc. In order to prevent the coating film from cracking, it is preferable to apply the water-based coating composition according to the present invention after the base treatment using a putty material or a base treatment paint.

  However, if there is no risk of cracking of the paint film after painting, such as when a vinyl cloth is already stretched or a soil wall made of diatomaceous earth is formed, it is applied to the present invention as it is without being ground-treated. Such a water-based coating composition can also be applied.

  In the interior method using the water-based coating composition of the present invention, a coating film can be formed by appropriately applying a temperature as needed, or by air drying using cold air or hot air.

According to the water-based coating composition according to claim 1 of the present invention, since it is composed of a specific mineral powder and a specific binder, the concentration reducing effect of the volatile organic compound, the humidity control effect, the water retention effect, the deodorizing effect, etc. The coating film which has can be formed.

According to the interior method using the aqueous coating composition according to claim 2 of the present invention, since the aqueous coating composition according to claim 1 is used, the concentration reducing effect of the volatile organic compound, the humidity control effect, An environment having a water retaining effect and a deodorizing effect can be formed.

Hereinafter, specific examples of the present invention will be described in detail in comparison with comparative examples.
In addition, this invention is not limited to a following example.

Example 1
First, a natural pozzolana powder (natural pozzolana (manufactured by Pojopia Co., Ltd., Korea), made in Korea) was pulverized as a mineral powder so as to pass through a sieve having a mesh opening of 0.1 mm.
Next, dry starch (manufactured by Kaneyo Soap Co., Ltd., trade name: Kaneyo Konk stand pack) was prepared as a polyalcohol.
Then, 1000 g of the above-mentioned natural pozzolana, 22 g of dry starch, 200 g of No. 8 silica sand (manufactured by Rokuroya Mining Co., Ltd.), 3 g A mixture for a water-based coating composition was prepared by adding 100 g of (made by company) and mixing.
Then, water-based coating composition of Example 1 was produced by adding 1200 g of water to the above mixture and stirring.

  Here, the blending amount of the natural pozzolanic powder, which is a mineral powder, is 75.6% by weight of the total amount of the natural pozzolana, dry starch, silica sand, and ocher, which is the solid content of the water-based paint composition, The compounding quantity of the dry starch which is polyalcohol is 1.7 weight% with respect to solid content of a water-system coating composition.

(Example 2)
A water-based coating composition of Example 2 was prepared in the same manner as Example 1 except that the amount of dry starch was 13 g.

(Example 3)
A water-based coating composition of Example 3 was prepared in the same manner as in Example 1 except that the blending amount of natural pozzolanic powder was 850 g and the blending amount of dry starch was 20 g.

Example 4
A water-based paint composition of Example 4 was prepared in the same manner as in Example 1 except that the amount of dry starch was 46 g, the amount of No. 8 silica sand was 1500 g, and the amount of oat and oat was 500 g. .

(Example 5)
A water-based coating composition of Example 1 was prepared in the same manner as in Example 3 except that the amount of dry starch was 20 g, and No. 8 silica sand and 3 cocoons were used.

(Example 6)
A water-based paint composition of Example 6 was prepared in the same manner as in Example 1 except that sawdust (made by Sakuma Wood Co., Ltd., trade name: Hinoki granules) was used in place of the 3 thread ocher.

(Comparative Example 1)
A water-based coating composition of Comparative Example 1 was prepared in the same manner as in Example 1 except that 1000 g of diatomaceous earth (produced by Umehiko Co., Ltd.) and 20 g of dry starch were used in place of the mineral powder.

(Comparative Example 2)
A water-based paint composition of Comparative Example 2 in the same manner as in Example 1 except that 300 g of a synthetic resin (ethylene vinyl acetate copolymer emulsion, manufactured by Toyon Co., Ltd., trade name: Sealer N) was used instead of polyalcohols. Was made.

(Comparative Example 3)
A water-based paint composition of Comparative Example 3 was prepared in the same manner as Comparative Example 1 except that 1000 g of plaster (manufactured by Inoue Mankichi Shoten Co., Ltd.) was used instead of the mineral powder.

(Comparative Example 4)
A water-based coating composition of Comparative Example 4 was prepared in the same manner as in Example 1 except that the amount of dry starch was 10 g.

(Comparative Example 5)
A water-based coating composition of Comparative Example 5 was produced in the same manner as in Example 1 except that the amount of dry starch was 30 g.

  Table 1 shows the blending amount of each example and each comparative example, the blending amount of the mineral powder with respect to the solid content of the aqueous coating composition, and the blending amount of the polyalcohols with respect to the solid content of the aqueous coating composition.

Next, Examples 1 to 6 and Comparative Example 1 were formed on the inner wall surface of a plywood box with a door made of F ☆☆☆☆ (Forster) plywood (Benyoshi Co., Ltd., plate thickness: 12 mm). A specimen was prepared by coating the water-based coating composition of ˜5.
Specimen size: 710mm long x 530mm wide x 400mm deep
Coating machine: Rishin Gun MD (caliber 4mm, manufactured by Toyooka Seisakusho)
Spray gauge pressure: 5.5kgf / cm2
Application amount: 720 g / m2
Drying method: natural drying for 3 days at room temperature

  Next, a concentration test, a humidity control test, a water retention test, a deodorization test, and an adhesion test for the volatile organic compound were performed by the following methods.

(Concentration test for volatile organic compounds)
About the density | concentration test of a volatile organic compound, it carried out in the following procedures. Note that a portable formaldehyde simple measuring instrument (manufactured by Shin Cosmo Electric Co., Ltd., model: XP-308B, certified by the Ministry of Health, Labor and Welfare) is used for the concentration measurement, and for evaluation, the concentration after taking out the plywood is 0.08 ppm or more Those that would be rejected.
A) Measure the VOC concentration immediately after painting.
B) Place the unmarked plywood in the specimen for 2 days, and then measure the VOC concentration just before taking it out.
C) After taking out, measure the VOC concentration on the first day.
D) Measure VOC concentration on day 7 after removal.
E) Measure VOC concentration on day 10 after removal.

(Humidity control test)
The humidity control test was performed according to the following procedure. In addition, about the evaluation, the thing in which the fall of humidity is not recognized was made disqualified.
A) A pan with an opening diameter of 280 mm, a bottom diameter of 145 mm, and a depth of 100 mm. From the opening to the depth of 50 mm, it is cylindrical, and from the depth of 50 mm to the bottom is a mortar. Put 2000cc of water in the pan and boil.
B) Put the pan of A) into the specimen and place it for 10 minutes, then remove it.
C) Measure the humidity after 3 minutes and 5 minutes after removal, and measure the change in humidity.

(Water retention test)
The water retention test was performed according to the following procedure. In addition, about the evaluation, what the dripped water did not osmose | permeate a coating film (what dripped water repels water) was made disqualified.
A) A 10 cm × 10 cm square frame is set on the coating film on the bottom surface of the specimen.
B) Water was dropped on the four-sided frame of A), and the amount of water absorbed until the water floated on the coating film was measured.

(Deodorization test)
About the deodorization test, it carried out in the following procedures. In addition, about evaluation, it evaluated by the three evaluation criteria of (circle): There is no fragrance, (triangle | delta): Slightly fragrance, x: There is clearly fragrance by the sensory test by several evaluators.
A) A car air freshener (Daika Co., Ltd., trade name: garne gel air freshener No. 8) is placed in the test body for 5 minutes and then removed.
B) After taking out, the scent after 10 minutes is evaluated.
C) After taking out, the scent after 20 minutes was evaluated.

(Adhesion test)
The adhesion test was performed by a cross cut test according to the following procedure.
A) Create 36 squares of 1 cm squares on the coating film on the bottom of the specimen with a cutter.
B) After sticking an adhesive tape (product name: Pylon (cellophane adhesive tape) manufactured by Kyowa Co., Ltd.), it is peeled off at an angle of 60 degrees with respect to the coating film.
C) The number of grids from which the coating film peeled after peeling was measured.

(Evaluation of paint workability and work environment)
In addition, the paint workability and work environment were also evaluated.
Here, as to the workability of the coating, an evaluation was made as to whether it can be satisfactorily applied from a lysing gun or whether the coating mist sprayed when applying the water-based coating composition fills the area.
In addition, the work environment was evaluated as to whether there were any matters that would affect the health of the painter.

  Table 2 shows the measurement results of the above tests, and Table 3 shows the evaluation of each test.

  From the test results of Table 2 and Table 3, the water-based paint composition according to the present invention has shown good results in all the evaluation items, and the excellent concentration reduction effect of the volatile organic compound, the humidity control effect, the water retention effect, It was found to show a deodorizing effect.

  The water-based coating composition of the present invention and the interior method using the water-based coating composition exhibit the effect of reducing the concentration of the volatile organic compound, the humidity control effect, the water retention effect, and the deodorizing effect while satisfying the adhesion to the substrate. Can be used as

Claims (2)

A water-based paint composition mainly composed of mineral powder,
A) natural pozzolana as mineral powder ;
B) starch as a polyalcohol ,
C) containing water ,
The natural pozzolana is 30 to 98% by weight of the solid content of the water-based coating composition;
The aqueous coating composition, wherein the starch is 1 to 2% by weight of the solid content of the aqueous coating composition. An interior decoration method comprising coating with the water-based coating composition according to claim 1 .