KR20080056863A - An inorganic-ceramic-coating-composition which can be harden under normal temperature condition and a method for manufacturing thereof - Google Patents

Abstract

A cold curable inorganic ceramic coating agent composition is provided to prevent generation of cracks by imparting flexibility through the use of functional additives, to solve the problems related to thick film formation, and to enable natural curing at room temperature. A cold curable inorganic ceramic coating agent composition comprises: 60-70 wt% of an inorganic solution formed by reacting at least one organosilane with water containing at least one nano- to micro-sized silicon dioxide(SiO2) particles via hydrolysis and polycondensation; 15-20 wt% of a functional filler selected from potassium titanate, alumina and a mixture thereof; 3-8 wt% of pigment powder comprising iron oxide; and 2-22 wt% of a functional additive selected from tourmaline, rare earth metal ore and a mixture thereof.

Description

Room temperature-curable inorganic ceramic coating composition and manufacturing method thereof {AN INORGANIC-CERAMIC-COATING-COMPOSITION WHICH CAN BE HARDEN UNDER NORMAL TEMPERATURE CONDITION AND A METHOD FOR MANUFACTURING THEREOF}

The present invention relates to a room temperature-curable inorganic ceramic coating composition and a method for preparing the same, and more specifically, one or more organosilanes, and one or more nano-to-size silicon oxide (SiO 2) particles. A room temperature-curable inorganic ceramic coating agent obtained by mixing a functional solution for improving the physicochemical properties of the coating film with an inorganic solution hydrolyzed and polycondensed by reacting with water, and an inorganic pigment powder and other functional additives for improving the functionality. It relates to a composition and a method for producing the same. At this time, the room temperature curing type means a property that can be cured even if left at normal room temperature without undergoing a separate high temperature baking process.

In general, paints or coatings are intended for long-term storage by beautifully extending the life and aesthetics through the protection of structures, buildings, and the like. Therefore, paints or coatings must be able to exhibit good gloss or color (designability), be easy to work and smellless (workability), paints or coatings must be preserved for a long time, chemically resistant (solvent resistant) , Chemical resistance, weather resistance, water resistance, antimicrobial, etc.) and physically good properties (non-flammable, flame retardant, waterproof, adhesion strength, electrical insulation, etc.), and also do not harm to human body or cause environmental pollution. Securing is the ultimate goal of the paint or coating.

Conventional building paints are manufactured by mixing various chemicals with organic materials extracted from crude oil, and most of them include organic materials. As a result, microorganisms multiply among the fine cracks formed in the coating layer over time after coating. There was a problem of peeling in several places, there is a problem that the color is discolored when continuously exposed to ultraviolet light, the flame retardant effect is low due to weak heat.

In addition, most paints contain various contaminants that are harmful to the human body, and these contaminants cause environmental diseases such as atopic dermatosis, headache, vomiting, and other sickness syndrome.

In addition, while the reserves of oil are limited, the supply and demand of raw materials for producing paints is becoming increasingly difficult as the amount of use is rapidly increased.

On the other hand, the various ceramic paints proposed to solve the problems occurring in the conventional paints as described above are largely composed of four elements, such as binders, pigments or dyes, solvents, additives, in all conventional ceramic paints as a binder Organic polymers such as acetone, benzene, toluene, and xylene were used, and since most of the additives were organic materials, problems of the conventional paint could not be completely solved.

In addition, conventional paints or coatings containing ceramics have a problem that most of the rigidity is rigid and cracking is severe, it is difficult to thicken or coated, and have to undergo a process of baking at high temperature by applying strong heat.

The present invention, which was devised to solve the above problems, provides flexibility through functional additives to prevent crack generation, solve thick film problems, and can be cured naturally at room temperature. It is an object to provide a manufacturing method.

The room temperature-curable inorganic ceramic coating composition according to the present invention devised to achieve the above object comprises one or two or more organosilanes containing one or more nano- to micro-sized silicon oxide (SiO 2) particles. 60 to 70 wt% of a mineral solution formed by reacting with water to form hydrolysis and polycondensation; 15-20 wt% of a functional filler selected from one or a mixture of potassium titanate or alumina; 3-8 wt% of a pigment powder composed of iron oxide; 2 to 22 wt% of a functional additive selected from one or a mixture of tourmaline or rare earth ore; It is configured to include.

At this time, the functional additive preferably contains 3 to 5% wt% of titanium oxide having a particle size of 1 to 100nm to impart photocatalytic properties.

In addition, the organosilane is preferably one selected from methyltrimethoxysilane and tetraethoxysilane or a mixture thereof.

On the other hand, in the method for producing a room temperature-curable inorganic ceramic coating composition as described above, 35 to 45 parts by weight of silica sol is mixed with respect to 100 parts by weight of one or two or more organosilanes, and stirred at 40 to 50 ° C. for about 5 to 10 minutes. Preparing an inorganic solution in a sol state; 60 to 70 wt% of the inorganic solution prepared in the above step, 15 to 20 wt% of a functional filler selected from potassium titanate or alumina, and 3 to 8 wt% of a pigment powder composed of iron oxide; Adding 2 to 22 wt% of a functional additive selected from one or a mixture of tourmaline or rare earth ore into the reactor to stir the mixed liquid; A homogenizing step of putting the stirred material in the step into a homogenizer and stirring the particles at high speed for about 1 to 2 hours to homogenize the particles; The coating material extraction step of extracting the filtered particles by passing the material of the uniform material in the step of about 325 ~ 1000 mesh (mesh);

At this time, in the step of preparing the inorganic solution, it is preferable to add any one selected from methanol, ethanol, isopropanol or alcohol mixture to control the viscosity and reaction rate of the solution.

In addition, it is preferable that 2 to 22 wt% of the functional additive to be added in the step of stirring the mixed solution contains 3 to 5 wt% of titanium oxide having a particle size of 1 to 100 nm.

Hereinafter will be described in more detail the configuration and manufacturing process of the present invention.

Prior to describing the room temperature-curable inorganic ceramic coating composition according to the present invention, the structure and principle of the starting material of the inorganic solution will be briefly described.

The alkoxy silane is represented by the molecular formula R _n Si (OR ′) _4-n , _wherein R is an alkyl group, methyl, ethyl, phenyl, CF ₃ CH ₂ CH ₂ , CF ₃ (CF ₂ ) ₅ CH ₂ CH ₂ , CF ₃ (CF ₂ ) ₇ CH ₂ CH _{2 and the like} , OR ′ is a hydrolyzable alkoxy group and is hydrolyzed by water or water in the air or water on the surface of the material to generate a silanol group (Si-OH), and the silanol group An oxane bond (Si-OM) is formed between the surface of the material (M-OH) to bond with the material with a strong force. As described above, the stable inorganic axis composed of silicon-oxygen has a higher binding energy than other bonds as shown in the following table, and silicon can exhibit the same characteristics such as weather resistance, chemical resistance, wear resistance, and high hardness. In addition, due to the flexibility and elasticity of the silicon-oxygen bond, the resistance to cold resistance and repeated thermal shock is strong.

In the present invention, the organosilane is hydrolyzed and polycondensed in the presence of silicon oxide to form an inorganic solution. Since the inorganic solution has a silanol group as described above, the silanol group forms a strong bond of oxane. Inorganic solution itself will be able to play a role as a powerful binder.

The inorganic solution is obtained by mixing and stirring 35 to 45 parts by weight of silica sol to 100 parts by weight of an organosilane, in particular one of methyltrimethoxysilane and tetraethoxy silane or a mixture of the two materials, wherein If the amount is out of the above range, the bonding force of the oxane bond (Si-OM) is weakened, and therefore, it is preferable to mix within the above range because peeling occurs at high heat.

On the other hand, in the inorganic solution manufacturing process, one or more substances selected from methanol, ethanol, isopropanol or alcohol mixtures may be added to control the viscosity and reaction rate of the solution.

In addition, to improve the physicochemical properties of the coating film formed by the coating agent, potassium titanate, alumina (Al ₂ O ₃ ), or the like may be used as the functional filler. Since these materials have a needle-like or plate-like particle shape, they may play a role of preventing cracks or adjusting the viscosity of the coating agent, and may improve heat resistance, far-infrared radiation, and wear resistance. In this case, when the functional filler is added in an amount of 15wt% or less, it may cause a decrease in gloss or adhesion. It is preferable to add in the inside.

Meanwhile, the room temperature-curable inorganic ceramic coating composition according to the present invention may be used as a substitute for conventional paint, and for this purpose, various colors should be exhibited. Conventionally, organic pigments or dyes have been used in order to exhibit color. However, since these organic materials may cause various problems described above, in the room temperature-curable inorganic ceramic coating composition according to the present invention, the inorganic and color may be represented. Iron oxide pigments were added. It is preferable that such a pigment content is contained in about 3 to 8 wt%, and if it is contained below it, color may not be represented properly, and when it is contained above, it may cause a weakening of the binding force.

In addition, the room temperature-curable inorganic ceramic coating composition according to the present invention may contain about 2 to 22wt% of a suitable material as a functional additive in order to impart far-infrared or anion radiation function as necessary.

Tourmaline and rare earth ore are generally used as materials used to emit anions or far infrared rays. The tourmaline is generally referred to as tourmaline, a kind of quartz rock, and is a permanently polarized mineral, which emits a very small amount of negative ions in a fixed state, but is supplied with temperature, friction, pressure, vibration, or impact energy from the outside. Emits a large amount of negative ions or far infrared rays.

On the other hand, rare earth ore generates negative ions even when stationary, but is classified as radioactive minerals, so it is necessary to use caution due to safety. Although organisms may adversely affect tissues such as tissue degeneration or chromosomal abnormalities due to radiation, it has been found that low-level radiation may have beneficial effects in living organisms due to clinical trials of low-level radiation in the United States and Japan. It can be used in a range that generates a level of radiation harmless to the human body.

When the tourmaline or rare earth ore as described above is contained in the room temperature-curable inorganic ceramic coating composition according to the present invention, it is important to properly mix the tourmaline or rare earth ore according to the use thereof, in an environment where external stimuli can be continuously given. If used, it can increase the specific gravity of the tourmaline and vice versa to increase the specific gravity of the rare earth ore, and can be properly formulated according to the purpose to maximize the far infrared or anion emission.

In addition, the functional additive may include a titanium oxide capable of performing a photocatalytic function, the titanium oxide is activated by light to play a role of changing various pollutants into harmless materials.

The room temperature-curable inorganic ceramic coating composition as described above is largely prepared through four steps: preparing an inorganic solution, stirring a mixed solution, homogenizing, and extracting the coating agent.

In the inorganic solution preparation step, 35 to 45 parts by weight of silica sol is mixed with respect to 100 parts by weight of one or two or more organosilanes, in particular one selected from methyltrimethoxysilane or tetraethoxysilane, or a mixture thereof, and 40 to 50 While stirring for about 5 to 10 minutes at a temperature, the mixed solution of the organosilane and silica sol is exothermic reaction by a chemical reaction, it changes from a turbid state to a clear transparent liquid state during the reaction. At this time, in order to control the viscosity and the reaction rate of the solution can be adjusted by adding any one selected from methanol, ethanol, isopropanol or alcohol mixture, through this process an inorganic solution in the sol (Sol) state is prepared.

Next, in the mixed liquid stirring step, 60 to 70 wt% of the inorganic solution prepared in the above step, 15 to 20 wt% of a functional filler selected from one or a mixture of potassium titanate or alumina, and a pigment powder consisting of iron oxide 3 to 3 wt. 8 wt%; 2 to 22 wt% of the functional additive selected from one or a mixture of tourmaline or rare earth ore is added to the reactor to stir the mixture to form an inorganic ceramic mixture.

Next, in the homogenization step, the material stirred in the step is placed in a homogenizer and stirred at high speed for about 1 to 2 hours to homogenize the particles.

Next, in the coating extracting step, the material is homogenized in the step is passed through a mesh of about 325 ~ 1000 mesh (mesh) to extract the filtered particles to complete the coating.

In addition, it is preferable that 2 to 22 wt% of the functional additive to be added in the step of stirring the mixed solution contains 3 to 5 wt% of titanium oxide having a particle size of 1 to 100 nm.

The drawings and specification are merely exemplary of the invention, which are used only for the purpose of illustrating the invention and are not intended to limit the scope of the invention as defined in the meanings or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The room temperature-curable inorganic ceramic coating composition according to the present invention configured as described above has improved characteristics over any conventional paints or coatings with respect to the conditions that the above-described paints or coatings should have.

Among them, the most important property is that it hardens easily at room temperature without undergoing a separate high temperature firing process. In addition, it can exhibit gloss or color well. In addition, the chemical and physical resistance is good, so that the coating film can be preserved for a long time, and it is harmless to the human body and provides a useful effect of ensuring safety by not causing environmental pollution.

Furthermore, it blocks harmful substances such as VOC or formaldehyde to reduce the incidence of sick house syndrome, and since all the components are inorganic, it minimizes environmental pollution even after disposal, and maintains them semi-permanently, thus providing a useful effect of long life.

In addition, since the peeling or discoloration is prevented, the beautiful appearance can be maintained for a long time, and since all the components are inorganic, they are very resistant to heat, and the supply and demand of materials is smooth because the inorganic materials can be obtained from nature.

Claims (6)

60-70 wt% of an inorganic solution formed by hydrolysis and polycondensation of one or two or more organosilanes with water containing one or more nano- to micro-sized silicon oxide (SiO 2) particles; 15-20 wt% of a functional filler selected from one or a mixture of potassium titanate or alumina; 3-8 wt% of a pigment powder composed of iron oxide; 2 to 22 wt% of a functional additive selected from one or a mixture of tourmaline or rare earth ore; Configured including Room temperature curing type inorganic ceramic coating composition. The method of claim 1, The functional additive is characterized in that it comprises a titanium oxide 3 ~ 5% wt% of particle size of 1 ~ 100nm to give a photocatalyst Room temperature curing type inorganic ceramic coating composition. The method of claim 1, The organosilane is characterized in that one or a mixture selected from methyltrimethoxysilane, tetraethoxysilane Room temperature curing type inorganic ceramic coating composition. Mixing 35 to 45 parts by weight of silica sol with respect to 100 parts by weight of one or two or more organosilanes, and stirring the mixture at 40 to 50 ° C. for about 5 to 10 minutes to prepare an inorganic solution in a sol state; 60 to 70 wt% of the inorganic solution prepared in the above step, 15 to 20 wt% of a functional filler selected from one or a mixture of potassium titanate or alumina, and 3 to 8 wt% of a pigment component consisting of iron oxide; Adding 2 to 22 wt% of a functional additive selected from one or a mixture of tourmaline or rare earth ore into the reactor to stir the mixed liquid; A homogenizing step of putting the stirred material in the step into a homogenizer and stirring the particles at high speed for about 1 to 2 hours to homogenize the particles; A coating material extraction step of extracting the filtered particles by passing a material having uniform particles in the step through a network of about 325 to 1000 mesh; Characterized in that comprises a Room temperature curing type inorganic ceramic coating composition. The method of claim 4, wherein In the step of preparing the inorganic solution Methanol, ethanol, isopropanol or any one selected from the alcohol mixture is added to adjust the viscosity and reaction rate of the solution Room temperature curing type inorganic ceramic coating composition. The method of claim 5, wherein 2 to 22 wt% of the functional additives added in the step of stirring the mixed solution is characterized in that the addition of 3 to 5wt% of titanium oxide having a particle size of 1 ~ 100nm Room temperature curing type inorganic ceramic coating composition.