JP2005126561A - Composition for multi-functional coating - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new composition for a multi-functional coating excellent in gas permeability and hydrophobicity and used as a countermeasure against sick house syndrome and as a countermeasure against heat island phenomenon. <P>SOLUTION: The composition for the coating contains as the effective ingredients a super-porous inorganic substance and a superfine powder material of monazite or bastnaesite that contains the rare earth element from a lanthanum salt. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a coating composition comprising a superporous inorganic material mixed with a monazite or bust nesite ultrafine powder containing a rare earth element of a lanthanum salt.

  10 to 100 parts by weight of a reactive silicon water repellent per 100 parts by weight (in terms of solid content) of the film forming agent in a composition containing colloidal silica in a (meth) acrylic acid ester polymer emulsion as a film forming agent Addition and excellent air permeability and hydrophobicity consisting of adding 300 to 1,000% by weight of an inorganic substance in terms of solid content with respect to the film forming agent containing the silicon water repellent. The siliceous water-based inorganic coating is disclosed in Japanese Patent Application Laid-Open No. 60-63262, which is a patent application of the present applicant. This publication is cited herein for further explanation of siliceous water-based inorganic paints.

  Silica water-based inorganic paints are (1) excellent in adhesion due to small particles of inorganic colloidal silica, and (2) a breathable paint is formed, resulting in improved breathability due to an increase in internal vapor pressure , It is difficult to peel off the coating film, (3) It is flame retardant because it uses inorganic colloidal silica, (4) It has abrasion resistance and the coating film does not wear down, (5) Inorganic coating Because it is harmless to humans, it is not necessary to remove old paint when refinishing the coated substrate (concrete, gypsum board, cement forming plate, mortar, aluminum, iron, wood, etc.). It is a paint with excellent characteristics such as being able to finish.

  However, in recent years, there has been a situation in which various poor physical conditions occur in residents due to indoor air pollution caused by dust, dust, chemical substances, etc. due to indoor airtightness and the use of building materials and interior materials that release chemical substances. Many reports have been made. Causes are caused by harmful chemical substances (VOC) contained in building materials, formaldehyde, etc., and by airtight indoors, cigarette smoke, smoke, pollen, viruses in the air, bacteria, ticks, etc. It is a disease called “house syndrome”. Today, the occurrence of shock house syndrome is taken up as a major social problem, and a solution is sought. In addition, the development of road networks is an urgent issue today as traffic volume increases. The urban heat island phenomenon caused by the high-temperature endothermic insulation caused by asphalt, etc. is taken up as a major social problem. And mitigation measures for the phenomenon are required.

JP 60-63262 A

  The present invention provides a novel multifunctional coating composition that is excellent in breathability and hydrophobicity and that is used for the countermeasure against shock house syndrome and the countermeasure for the heat island phenomenon.

  The present invention provides a coating composition comprising an ultraporous inorganic substance and a lanthanum salt-containing rare earth element-containing monazite or basnetite ultrafine substance as active ingredients.

  The types of paints are water-based, solvent-based and solvent-free paints, such as various organic water-based paints, siliceous water-based paints, silicone resin paints with siloxane bonds, acrylic silicon solvent-based paints, and fluorine resin-based solvent-based paints. Can be used. Examples of the inorganic porous material include artificial zeolite such as coal ash, charcoal ash, bamboo charcoal ash, and ash ash, apatite of calf bone calcined fine powder, and the like, which can be used alone or in combination. White artificial zeolite is made by reacting while warming with water in which sodium hydroxide is dissolved in order to remove unburned charcoal and iron powder from coal ash, charcoal ash, bamboo charcoal ash, ash ash, and the like. In addition, even when the method is heated at a high temperature (800 to 900 ° C.), the charcoal burns and becomes carbon dioxide gas and escapes. To remove iron, add a small amount of sodium dithionate powder and stir while adding water containing sodium bicarbonate (sodium bicarbonate) and sodium citrate to coal ash and heating. Iron and lead are also melted, and white charcoal ash is obtained when filtered and washed with water. Coal ash, charcoal ash, bamboo charcoal ash, straw ash and the like thus purified can be used in the present invention.

The ultra fine powder of monazite or bust necite is white or low-grade lanthanum oxide (La ₂ O ₃ ), and is an ore containing this rare earth element. To make ultrafine particles. The pulverization method is performed by a method such as a ball mill, a hammer mill, or an atomizer, and it is desirable to include nano-level ultrafine pulverization.

  Moreover, you may grind | pulverize with bamboo charcoal ash. In this case, a chemical reaction by pulverization called mechanochemistry occurs.

  Monazite and bastonite natural stones are mixed crystal ores such as lanthanum and silica, alumina, magnesia, etc., and also contain lanthanum oxide and lanthanum carbonate, and function in the same way. Among lanthanum salts, there are lanthanum oxide, lanthanum oxalate, lanthanum boride, lanthanum hydroxide and the like. As for its physical properties, an alloy with a metal reacts with nitrogen to form LaN, and water reacts with hydrogen to generate hydrogen. The basicity of hydroxide is the strongest among rare earth elements.

In addition, it exhibits paramagnetism and emits significant thermoelectrons. Since the water-based paint is weakly alkaline, it partially changes to La ₂ (OH) ₆ and has an oxidizing action. Therefore, since it has a redox action, it has the power to decompose volatile chemical substances (VOC). The thermionic emission action absorbs heat and emits electrons, that is, generates OH ⁻ and O ₂ ⁻ ions. Unlike photocatalyst paint, it has a redox action even without ultraviolet rays, and its function continues forever.

A chemical substance is absorbed in a short time by artificial zeolite from apatite, coal ash, charcoal ash, bamboo charcoal ash, straw ash, etc., and when used in combination with monazite or bastonite ore, deodorization, O. C. Decomposing / sterilizing, antifouling and suitable negative ions can be generated to obtain the effects of forest bathing and waterfall flow. In addition, by using the composition of the present invention, the temperature rise due to the black ultraviolet absorption of urban asphalt, which is said to be a heat island phenomenon, and the heat generation of the external unit of the cooling equipment also have a heat absorption effect, so it is dramatically reduced It was found that a paint having the function of La ₂ O ₃ also directly decomposes NO _{x in} automobile exhaust.

When the composition of the present invention was used for a building paint, it was a multifunctional paint that quickly absorbed and decomposed all volatile chemical substances generated from indoor condensation prevention, formaldehyde decomposition, floorboards and wall materials. Further, it was found that the adsorptivity of formaldehyde, xylene and ammonia was particularly excellent and there was no odor.
The interior is preferably a water-based paint. The non-flammable function can be further added to the siliceous inorganic paint.

  Japanese Patent Application Laid-Open No. 2002-265852 relating to the applicant's patent application discloses a method for producing an inorganic coating when used as a road load countermeasure paint for roads. By using a combination of fine ore powder of stone or bastonite and a superporous material, an epoch-making heat island coating can be obtained.

  In addition, all kinds of paints are effective as the kind of paint, but it is desirable to use a porous paint and have a large adsorption area. The same effect was obtained with the solventless siloxane paint and the solventless urethane paint. However, V. O. C. Although the absorption rate is slow, it has been found that negative ionicity is similarly generated and plays a role.

  Hereinafter, the present invention will be described with reference to examples.

Table-1
Architectural paint composition
No. Formulation
1. Chemical Substances Control Law Chemical Substance No. (6) -139 170
(Acrylic emulsion)
2. Colloidal silica 30% 38
3. Shimizu 250.7
4). Ultrafine calcium carbonate 100.0
5). Titanium oxide (rutile type) 98.0
6). White coal (artificial zeolite 3μm pulverized product from bamboo charcoal ash) 200.0
7). Monazite fine powder 100.0
8). Vinylethoxylane (Chemical Substances Control Law Chemical Substance (2) -2066) 40
9. Thickener CMC 0.1% 3
10. Preservative 50% 0.3
Total 1000

The number of negative ions was about 3200 / cm ² . Negative ions have the effect of detoxifying by combining with positively charged things such as cigarette smoke and smoke, pollen, viruses in the air, bacteria, and mites in the air. In the body, it is said to have the action of removing active oxygen and enhancing metabolism and immunity.

Table-2
Composition of water-based inorganic paint for road
No. Formulation
1. Acrylic ester copolymer Chemical Substances Control Law (6) -533 200
(48% emulsion)
2. Colloidal silk solution 30% 44
3. Shimizu 133.7
4). Fine calcium carbonate 100
5). Monazite fine powder 3μm pulverized product 150
6). Artificial zeolite from coal ash 3 μm pulverized product 100
7). Meteorite powder 100
8). Vinyltriethoxysilane (Chemical Examination Law (2) -2066) 4
9. Iron oxide pigment Fe ₂ O ₃ 30% dispersed plague 68
10. Preservative 50% 0.3
Total 900

The number of negative ions was about 6000 / cm ² (ion measuring device: negative ion measuring device EB-13 manufactured by Commiss Corporation).

Table-3

Item 1 2 3 4 5
Asphalt Asphalt Ordinary water Add 5 only Add 6 Add Table 2
And paint table Silicate paint 6 Changed 5 Changed paint composition
Bicarbonate on surface type Bicarbonate on surface
Lucium calcium
Ground temperature 43 ℃ 38 ℃ 30 ℃ 33 ℃ 28 ℃

When the temperature of black ordinary asphalt reaches 43 ° C. at an air temperature of 30 ° C., the surface temperature when the paint is applied on the asphalt is compared. Obviously, the temperature of the surface coated with the coating composition shown in Table 2 is low. This has been found to be effective in suppressing the heat island phenomenon.

Claims (4)

A coating composition comprising a superporous inorganic substance mixed with a monazite or bust nesite ultrafine powder containing a rare earth element of a lanthanum salt. 2. The paint according to claim 1, wherein the paint is an organic water-based paint, a siliceous water-based paint, a silicone resin paint having a siloxane bond, an acrylic silicon solvent-type paint, a fluorine resin-type solvent-type paint, an aqueous-type, solvent-type or solvent-free paint. Composition. The composition according to claim 1, wherein the superporous inorganic substance is artificial ash of coal ash, charcoal ash, bamboo charcoal ash, or straw ash, or apatite of calf bone calcined fine powder, or a mixture thereof. The composition according to claim 1, wherein the composition may further contain stone powder, calcium carbonate, various marbles, shellfish powder, coral, graphite, zirconium, titanium, magnesium, or various natural clayey materials.