KR102436348B1 - Infrared reflection, insulation and waterproof inorganic water-based paint manufacturing technology - Google Patents

Abstract

The present invention relates to a method for manufacturing an inorganic water-based paint for reflecting infrared rays, heat insulation, and waterproofing, which comprises: a first raw material mixing step of mixing hollow particles, an inorganic oxide, and a solvent; a second raw material mixing step of mixing a binder and a natural fiber with the mixture prepared in the first raw material mixing step; a dispersion step of dispersing the mixture prepared through the second raw material mixing step in water; and a polymerization step of heating and stirring the dispersed mixture through the dispersion step to polymerize the same. Since the inorganic water-based paint produced through the above process contains hollow particles and inorganic oxides to selectively reflect far-infrared rays and exhibits an excellent insulation effect, the inorganic water-based paint exhibits an excellent energy-saving effect when applied to indoor and outdoor buildings.

Description

Inorganic water-based paint manufacturing technology for infrared reflection, insulation and waterproofing {INFRARED REFLECTION, INSULATION AND WATERPROOF INORGANIC WATER-BASED PAINT MANUFACTURING TECHNOLOGY}

The present invention relates to a method for manufacturing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, and more particularly, it contains hollow particles and inorganic oxides to selectively reflect far-infrared rays to show excellent thermal insulation effect, so it is applied indoors and outdoors of buildings It relates to a method of manufacturing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, which exhibits excellent energy saving effect.

Insulation waterproofing paints require the use of porous fillers with excellent thermal insulation, thermal insulation, and light weight properties, but their use is limited in products due to the difficulty of dispersion with the starting material and the high production cost due to the nature of the process.

The characteristic of pigment is that when dispersed as an organic/inorganic material that is almost insoluble in water or organic medium, it has the effect of reinforcing color and strength.

The physical properties of paints or paints depend on pigments, binders and additives. Since pigments can selectively absorb or scatter light to change their appearance, it is possible to impart IR-reflective-like properties to pigments. When these IR-Reflective pigments are applied to paints or paints, the lifespan of the paints and paints is extended, and heat resistance and durability of the places or systems where the paints or paints are applied are improved. When the paint mixed with IR-Reflective pigment is applied to the roof, heat transfer to the building is reduced, the “urban heat island effect” is reduced, the energy required for cooling is reduced, and air pollution is reduced due to low energy consumption, and the durability is increased. . (Reference: A.K.Bendiganavale and V.C.Malshe, Recent Patents Chemical Engineering 2008.1. 67~69)

On the other hand, domestically imported hollow particles having excellent thermal insulation properties are used in the form of simply mixing the paint to block heat. However, when the hollow particles have a porous or open pore structure, when used simply by mixing with the paint, the paint penetrates into the hollow particles through the surface pores, thereby significantly reducing the insulation effect.

In particular, research and development of heat-shielding paint using ceramic materials has been conducted a lot in the past, but there is a fundamental limitation that a large amount must be added to realize excellent heat-shielding performance by simply mixing the ceramic material with paint and using it. do. When a large amount of ceramic material is mixed with the paint, it is difficult to disperse in the paint, so that the same heat shielding performance of the entire coated surface cannot be expected, and problems such as deterioration of adhesion and crack resistance of the paint may occur.

In addition, in the case of some ceramic materials, the heat shielding effect is lowered due to the sedimentation phenomenon. For example, when mica with a large layered structure is used for the manufacture of heat shielding paint, sedimentation occurs and the heat shield material is placed under the coated surface after application. There was a problem that the heat shielding effect could not be exhibited.

Korean Patent Registration No. 10-2001039 (2019.07.11) Korean Patent Registration No. 10-2206016 (January 15, 2021)

It is an object of the present invention to selectively reflect far-infrared rays and exhibit excellent thermal insulation effect because hollow particles and inorganic oxides are contained. to provide a way

Another object of the present invention is to provide a method of manufacturing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, in which the insulating performance is further improved as well as the flow-down or cracking of the coating film is suppressed.

An object of the present invention is a first raw material mixing step of mixing hollow particles, inorganic oxides and a solvent, a second raw material mixing step of mixing a binder and natural fiber in the mixture prepared through the first raw material mixing step, the second raw material A method for producing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, characterized in that it comprises a dispersion step of dispersing the mixture prepared through the mixing step in water and a polymerization step of polymerization by heating and stirring the mixture dispersed through the dispersing step. achieved by providing

According to a preferred feature of the present invention, the first raw material mixing step is made by mixing 100 parts by weight of hollow particles, 20 to 50 parts by weight of an inorganic oxide, and 200 to 300 parts by weight of a solvent.

According to a more preferred feature of the present invention, the second raw material mixing step is made by mixing 200 to 400 parts by weight of a binder and 20 to 50 parts by weight of natural fiber with respect to 100 parts by weight of the mixture prepared through the first raw material mixing step. .

According to a more preferred feature of the present invention, in the second raw material mixing step, 2 to 4 parts by weight of a silicone-based water repellent is further contained relative to 100 parts by weight of the mixture prepared through the first raw material mixing step, and the silicone-based water repellent is potassium methylsiliconate. shall be made with

According to an even more preferred feature of the present invention, the hollow particles have a particle size of 50 to 300 micrometers and a density of 0.1 to 0.6 kg/m ³ .

According to an even more preferred feature of the present invention, the hollow particles are made of at least one selected from the group consisting of silica, alumina, zirconia, talc and bentonite.

According to an even more preferred feature of the present invention, the inorganic oxide is made of at least one selected from the group consisting of zirconium oxychloride octahydrate, titanium oxysulfate, zinc nitrate hexahydrate and zinc chloride.

According to an even more preferred feature of the present invention, the binder is to be composed of 100 parts by weight of an acrylic monomer, 3 to 4 parts by weight of a styrenic monomer, and 2 to 3 parts by weight of a functional monomer.

According to an even more preferred feature of the present invention, the natural fiber is made of at least one selected from the group consisting of latex, pulp, starch and cotton.

According to an even more preferred feature of the present invention, in the dispersing step, 200 to 300 parts by weight of water are mixed with 100 parts by weight of the mixture prepared through the second raw material mixing step, and stirred at a speed of 50 to 150 rpm for 4 to 6 minutes. to be done

According to an even more preferred feature of the present invention, the polymerization step is made by stirring the mixture dispersed through the dispersing step at a temperature of 75 to 85° C. and a speed of 50 to 150 rpm for 150 to 200 minutes.

The manufacturing method of the inorganic water-based paint for infrared reflection, heat insulation and waterproofing according to the present invention contains hollow particles and inorganic oxides to selectively reflect far-infrared rays, thereby exhibiting an excellent thermal insulation effect. It exhibits an excellent effect of providing a paint that shows.

In addition, it has an excellent effect of providing a paint that not only improves the insulation performance further, but also suppresses dripping or cracking of the coating film because it contains advanced fiber.

1 is a flowchart showing a method of manufacturing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing according to the present invention.

Hereinafter, a preferred embodiment of the present invention and the physical properties of each component will be described in detail, which is intended to describe in detail enough that a person of ordinary skill in the art to which the present invention pertains can easily carry out the invention, This does not mean that the technical spirit and scope of the present invention is limited.

The method for producing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing according to the present invention is a mixture prepared through a first raw material mixing step (S101) of mixing hollow particles, an inorganic oxide and a solvent, and the first raw material mixing step (S101) The second raw material mixing step (S103) of mixing the binder and natural fiber in It consists of a polymerization step (S107) of polymerization by heating and stirring the dispersed mixture.

The first raw material mixing step (S101) is a step of mixing the hollow particles, the inorganic oxide and the solvent, 100 parts by weight of the hollow particles, 20 to 50 parts by weight of the inorganic oxide, and 200 to 300 parts by weight of the solvent to a mixing device equipped with a stirrer. It consists of a process of adding and stirring at a speed of 100 rpm for 10 minutes. After the first raw material mixing step (S101) consisting of the above process, the inorganic oxide is supported on the surface of the hollow particles.

The hollow particles have a property of floating in a solvent and high dispersibility due to their hollow structure and low density, and are contained in paints to give thermal insulation performance and an effect of effectively reflecting infrared rays, and the particle size is 50 to 300 micrometers. and a density of 0.1 to 0.6 kg/m ³ is preferred.

When the density of the hollow particles exceeds 0.6 kg/m ³ , the hollow particles cannot float in the solvent, and when the density of the hollow particles is less than 0.1 kg/m ³ , the mixing performance is deteriorated due to an excessively low density.

At this time, the hollow particles may be made of at least one selected from the group consisting of silica, alumina, zirconia, talc and bentonite. When the particle size of the hollow particles is less than 50 μm, mixing with the inorganic oxide is not uniform, When the particle size of the hollow particles exceeds 500 μm, the reflectivity to light increases, which causes a problem in projectability.

The inorganic oxide contains 20 to 50 parts by weight, and serves to impart an infrared reflection effect to the paint. Zirconium Oxychloride Octahydrate, Titanium Oxysulfate, Zinc Nitrate Hexahydrate (Zinc) Nitrate Hexahydrate), or zinc chloride (Zinc Chloride) is preferably made of one or more selected from the group consisting of.

The inorganic oxides listed above may have a refractive index of 1.5 or more to effectively reflect infrared rays, preferably 1.5 to 3.0, and more preferably 1.5 to 2.5. If the refractive index is less than 1.5, there is a problem that the thermal insulation performance is not sufficient because the reflection effect for infrared rays is insignificant.

In addition, the inorganic oxide preferably has an average particle diameter of 1 nm to 50 nm, preferably 1 nm to 30 nm, so that it can be well dispersed and supported on the surface of the hollow particles.

In addition, as the precursor of the inorganic oxides listed above, a conventional inorganic compound capable of producing a high refractive inorganic oxide such as titania (TiO ₂ ), zirconia (ZrO ₂ ), zinc oxide (ZnO), etc. having a high refractive index is all without limitation. It may be included as a precursor.

The second raw material mixing step (S103) is a step of mixing a binder and natural fiber with the mixture prepared through the first raw material mixing step (S101), and the mixture prepared through the first raw material mixing step (S101) It is preferable to mix 200 to 400 parts by weight of a binder and 20 to 50 parts by weight of natural fiber based on 100 parts by weight.

The binder contains 200 to 400 parts by weight, and consists of 100 parts by weight of an acrylic monomer, 3 to 4 parts by weight of a styrenic monomer, and 2 to 3 parts by weight of a functional monomer. It defies each component constituting the paint, and serves to impart viscosity and adhesion to the paint.

At this time, the acrylic monomer improves the quality and gives a soft feel to the surface of the coating film made of the paint. 2-Ethylhexylacrylate, Laurylmethacrylate, and n-butylacrylate (n-Butylacrylate) is preferably made of at least one selected from the group consisting of.

In addition, the styrene-based monomer serves to impart hardness to the coating film, and is preferably made of styrene.

In addition, the functional monomer serves to improve the miscibility of the acrylic monomer and the styrenic monomer, from the group consisting of acrylic acid, maleic acid and 2-hydroxypropyl methacrylate. It is preferable that it consists of one or more selected.

The natural fiber contains 20 to 50 parts by weight, and not only further improves the thermal insulation performance of the inorganic water-based paint for insulation and waterproofing according to the present invention, but also suppresses the dripping phenomenon in the process of applying the paint, and prevents cracks in the coating film It acts as an inhibitor, and it is preferably made of at least one selected from the group consisting of latex, pulp, starch and cotton.

The natural fiber components listed above are tasteless and odorless, and maintain excellent thermal stability, oil adsorption, chemical inertness, and excellent tension even at a temperature of 120 to 250 ° C. The natural fiber used in the present invention has an average particle length is 6 to 20 μm, and the hydrogen ion concentration (pH) is 5.0 to 7.5.

In addition, the natural fiber serves to provide effects such as reinforcement of three-dimensional three-dimensional structure, strengthening of viscosity, improvement of workability, prevention of dripping, prevention of cracking (crack resistance during the curing time), improvement of abrasion and prevention of shrinkage .

When the average particle length of the natural fiber is less than 6㎛, the miscibility is lowered and the viscosity of the paint is lowered, so that the coating film may flow down or cracks may occur in the coating film. When the average particle length of the natural fiber exceeds 20㎛, the paint Viscosity of is excessively increased, the miscibility with the hollow particles on which the inorganic oxide is supported is lowered, and the thermal stability of the coating film is lowered.

In addition, in the second raw material mixing step, 2 to 4 parts by weight of a silicone-based water repellent may be further contained relative to 100 parts by weight of the mixture prepared through the first raw material mixing step, and the silicone-based water repellent is preferably made of potassium methylsiliconate. .

When the silicone-based water repellent comprising the above components is further contained, a paint with improved waterproof performance can be provided, and the potassium methylsiliconate can be manufactured through the method described in Korean Patent Registration No. 10-0915216.

At this time, if the content of the silicone-based water repellent is less than 2 parts by weight, the above effect is insignificant, and when the content of the silicone-based water repellent exceeds 4 parts by weight, the waterproof performance of the paint is not significantly improved, and the manufacturing cost is increased.

The dispersing step (S105) is a step of dispersing the mixture prepared through the second raw material mixing step (S103) in water, and 200 to 200 parts by weight of the mixture prepared through the second raw material mixing step (S103) 300 parts by weight are mixed and stirred at a speed of 50 to 150 rpm for 4 to 6 minutes.

At this time, in the process of mixing the mixture with the water, 100 parts by weight of the mixture is evenly divided into 200 to 300 parts by weight of water for 5 minutes and slowly mixed, and the temperature at the time of mixing can be made at room temperature, and the water contains 100 parts by weight of water It may contain 1 to 2 parts by weight of surfactant per part.

The polymerization step (S107) is a step of polymerization by heating and stirring the mixture dispersed through the dispersing step (S105). It consists of a process of polymerization by stirring at a speed of 150 to 200 minutes.

After the polymerization step (S107) made under the above conditions, the polymerization of the monomers constituting the binder contained in the mixture dispersed through the dispersion step (S105) proceeds, and the hollow particles in which the inorganic oxide is supported as a whole in the binder are evenly distributed. It is possible to prepare a paint exhibiting uniform physical properties by mixing.

Hereinafter, the method for manufacturing the inorganic water-based paint for infrared reflection, heat insulation and waterproofing according to the present invention and the physical properties of the water-based paint prepared through the manufacturing method will be described with reference to examples.

<Production Example 1>

A binder was prepared by mixing 100 parts by weight of an acrylic monomer (2-ethylhexyl acrylate), 3.5 parts by weight of a styrene-based monomer (styrene), and 2.5 parts by weight of a functional monomer (acrylic acid).

<Example 1>

25 parts by weight of inorganic oxide (zirconium oxychloride octahydrate) and 80 parts by weight of water were mixed with 100 parts by weight of hollow particles (average particle size of 200 micrometers, hollow silica having a density of 0.4 kg/m ³ ) and mixed at a speed of 100 rpm for 10 minutes A mixture of inorganic oxide-supported hollow particles was prepared by stirring for a while, and 300 parts by weight of the binder prepared in Preparation Example 1 and natural cellulose (pulp having an average particle length of 14 μm) 35 parts by weight of the mixture. Mixing parts by weight and stirring for 10 minutes at a speed of 100 rpm to prepare a mixture, mixing 250 parts by weight of water with 100 parts by weight of the mixture and stirring at a speed of 100 rpm for 5 minutes to disperse, and the dispersed mixture at 80 ° C. Inorganic water-based paints for infrared reflection, heat insulation and waterproofing were prepared by polymerization at a temperature of 100 rpm for 180 minutes.

<Example 2>

In the same manner as in Example 1, 45 parts by weight of inorganic oxide were mixed to prepare an inorganic water-based paint for infrared reflection, heat insulation and waterproofing.

<Comparative Example 1>

In the same manner as in Example 1, an inorganic water-based paint for infrared reflection, heat insulation and waterproofing was prepared without mixing natural fiber.

<Comparative Example 2>

In the same manner as in Example 2, an inorganic water-based paint for infrared reflection, heat insulation and waterproofing was prepared without mixing natural fiber.

The infrared reflectance, thermal conductivity, and coating film dripping phenomenon of the inorganic water-based paints for infrared reflection, heat insulation and waterproofing prepared in Examples 1 and 2 and Comparative Examples 1 and 2 were measured and shown in Table 1 below.

{However, the infrared reflectance was measured by installing an integrating sphere on a JASCO (JAPAN) 650UV/VIS Spectrometer, and the baseline was set to barium sulfate. The silver water-based paint was applied with a cylindrical metal rod with a diameter of 1 cm in a vertical position, and the dripping phenomenon was visually observed.}

<Table 1>

As shown in Table 1, the inorganic water-based paints for infrared reflection, heat insulation and waterproofing prepared in Examples 1 and 2 of the present invention contain hollow particles and inorganic oxides to selectively reflect far-infrared rays to exhibit excellent thermal insulation effect. , provides a paint that exhibits an excellent energy saving effect when applied indoors and outdoors of buildings, and contains lead-inducing fiber to further improve thermal insulation performance, as well as suppress dripping or cracking of the coating film.

S101; 1st raw material mixing step
S103; 2nd raw material mixing step
S105 ; dispersion stage
S107; polymerization step

Claims (11)

A first raw material mixing step of mixing the hollow particles, the inorganic oxide and the solvent;
a second raw material mixing step of mixing a binder and natural fiber with the mixture prepared through the first raw material mixing step;
a dispersing step of dispersing the mixture prepared through the second raw material mixing step in water; and
A polymerization step of polymerization by heating and stirring the mixture dispersed through the dispersing step; consists of,
The hollow particles are made of at least one selected from the group consisting of talc and bentonite,
The inorganic oxide is made of one or more selected from the group consisting of titanium oxysulfate, zinc nitrate hexahydrate and zinc chloride,
The second raw material mixing step is made by mixing 200 to 400 parts by weight of a binder and 20 to 50 parts by weight of natural fiber with respect to 100 parts by weight of the mixture prepared through the first raw material mixing step,
The method for producing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, characterized in that the natural fiber is made of at least one selected from the group consisting of latex, starch and cotton.
The method according to claim 1,
In the first raw material mixing step, 100 parts by weight of hollow particles, 20 to 50 parts by weight of an inorganic oxide, and 200 to 300 parts by weight of a solvent are mixed.
delete The method according to claim 1,
In the second raw material mixing step, 2 to 4 parts by weight of the silicone-based water repellent are further contained relative to 100 parts by weight of the mixture prepared through the first raw material mixing step,
The method of manufacturing an inorganic water-based paint for infrared reflection, heat insulation and waterproofing, characterized in that the silicone-based water repellent is made of potassium methylsiliconate.
The method according to claim 1 or 2,
The hollow particles have a particle size of 50 to 300 micrometers and a density of 0.1 to 0.6 kg/m ³ .
delete delete The method according to claim 1 or 2,
The binder is an acrylic monomer 100 parts by weight, styrene-based monomer 3 to 4 parts by weight, and a method of manufacturing an inorganic aqueous coating for infrared reflection, heat insulation and waterproofing, characterized in that consisting of 2 to 3 parts by weight of the functional monomer.
delete The method according to claim 1,
In the dispersing step, 200 to 300 parts by weight of water are mixed with 100 parts by weight of the mixture prepared through the second raw material mixing step and stirred at a speed of 50 to 150 rpm for 4 to 6 minutes. A method of manufacturing an inorganic water-based paint for waterproofing.
The method according to claim 1,
The polymerization step is a method for producing an inorganic aqueous paint for infrared reflection, heat insulation and waterproofing, characterized in that the mixture dispersed through the dispersing step is stirred for 150 to 200 minutes at a temperature of 75 to 85° C. and a speed of 50 to 150 rpm .

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