KR101104390B1 - Manufacturing method of organic inorganic nanohybrid/nanocomposite varnish materials and the coated electrical wire - Google Patents

Abstract

PURPOSE: A producing method of an organic-inorganic nanohybrid/nanocomposite varnish material is provided to offer excellent arc resistance, electric insulation property, dielectric property, heat-resistance, adhesion property, and mechanical property. CONSTITUTION: A producing method of an organic-inorganic nanohybrid/nanocomposite varnish material comprises the following steps: surface processing aqueous or alcoholic ceramic sol with organic silane, and adding an organic solvent for synthesizing the ceramic sol; mixing 0.5-30 parts of ceramic nanoparticles by weight to 100 parts of ceramic sol by weight dispersed in the organic solvent for surface-reforming the ceramic nanoparticles with reactive silane, and dispersing to obtain an organic reactive nanohybrid composite ceramic sol; and mixing the organic reactive nanohybrid composite ceramic sol with a heat-resistant resin.

Description

Manufacturing method of organic-inorganic nano fusion insulated varnish and coil coated with organic-inorganic nano fusion insulated varnish manufactured by the same {Manufacturing Method of Organic Inorganic Nanohybrid / nanocomposite Varnish Materials and the Coated Electrical Wire}

The present invention relates to a method for manufacturing a nano-fusion insulating varnish and a coil using the same, in particular, polyamideimide (PAI) or polyesterimide (PEI), polyamic acid (PI precursor) having a high heat resistance grade, and the like. Method of manufacturing organic-inorganic nano fusion insulation varnish having storage stability and coating property by hybridizing varnish resin and ceramic nanoparticles of the varnish resin, and coating the organic-inorganic nano fusion insulation varnish with greatly improving thermal, mechanical and electrical characteristics It is about.

Conventional electric and electronic coils are insulated (coated) with enamels (curable resins) on copper wires.Coated materials made of resin have low heat and abrasion resistance, and are resistant to arc and surge resistance in high temperature environments. There is a problem of poor insulation. In addition, there is a problem that the coating coating is peeled off during the winding operation due to the weak adhesion and wear resistance.

Recently, as electrical equipment (motors, generators, transformers, etc.) using metal coils are highly integrated, the demand for high heat resistance insulating varnish is increasing, but there are problems in heat resistance, heat conductivity, and wear resistance of varnish materials.

Currently, varnish insulation materials such as PI, PAI, and PEI are known to have excellent heat resistance, but a single resin has limitations in satisfying thermal conductivity, thermal durability, surge (discharge) durability, and wear resistance. In particular, varnish materials are required for both flexibility and abrasion resistance, and thus, attempts to improve ductility and toughness of polymer coatings are performed by increasing molecular weight of polymers, controlling molecular weight distribution, and blending between heteropolymers.

Electric devices that use the power semiconductors such as electric vehicles, electric motors, and wind power generators for rapid precision control are exposed to high frequency generated internally. Therefore, the insulation deterioration of the coil to the high frequency surge is a problem.

Recently, it has been reported that the surge durability of coils using organic-inorganic hybrid insulating varnish containing colloidal silica in organic resins has been greatly improved. In organic-inorganic composite materials reinforced with nanoceramic, research is being conducted to improve the spatial integration of ceramics to increase abrasion resistance, and technology development for forming chemical bonds with and without interfacial energy is required.

In the "Applicant No. 10-2008-0037576, 10-2008-0088355" filed by the present applicant, "polyamideimide silica hybrid material for wire coating", "method of producing a coating material for high viscosity coils treated with fluorine silane", Development of hybrid insulation varnish with silica sol dissolved in PAI resin and coil coating technology secured, but hybrid varnish is in commercial use stage, but required mechanical properties such as flexibility, toughness, adhesiveness, elongation and wear resistance As the addition of ceramic particles increases, the viscosity of the hybrid varnish is accompanied by an increase in the ceramic content, which is still required to improve the properties of the ceramics in terms of high content, storage stability, adhesion and adhesion.

Accordingly, the present invention has been devised by the above necessity, to prepare a nano-fused ceramic sol by dissolving and dissolving the ceramic nanoparticles surface-modified with reactive silane in a ceramic sol surface-treated with an organosilane, polyamideimide (polyamideimide, Method for preparing organic-inorganic nano fusion insulation varnish having storage stability and coating property by dispersing in heat-resistant resin such as PAI) or polyesterimide (PEI), polyamic acid (PI precursor) and the organic-inorganic nano fusion It is an object of the present invention to provide a coil with an insulating varnish coated to improve thermal, mechanical and electrical properties.

In order to achieve the above object, the present invention includes a first step of synthesizing an organic solvent dispersion ceramic sol by surface-treating an aqueous or alcohol-based ceramic sol with an organic silane and adding an organic solvent to replace the solvent; Adding 0.5-30 parts by weight of ceramic nanoparticles to 100 parts by weight of the organic solvent-dispersed ceramic sol to disperse and disperse the ceramic nanoparticles with a reactive silane to prepare an organic-based reactive nano-fused ceramic sol; A third step of preparing the organic-inorganic nano fusion insulation varnish by mixing the reactive nano fusion ceramic sol with a heat-resistant resin of any one of polyamideimide, polyester imide, and polyamic acid or a mixture resin of two or more thereof; The manufacturing method of the organic-inorganic nano fusion insulation varnish characterized by including is made into a technical summary.

In addition, the aqueous or alcohol-based ceramic sol of the first step, it is preferable to use any one of silica, alumina and mixtures thereof synthesized from the aqueous or alcoholic colloidal silica or alumina, and a monomolecular precursor.

In addition, the organosilane of the first step, methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3-gly sidok when trimethoxysilane, 3-glycidoxypropyltrimethoxysilane to the silane, C ₂ ~ C alkyl group of up to _12, any one of the silane and the silane having a fluoroalkyl group of up to C ₂ ~ C ₁₂ or It is preferable that it is silane which mixed these.

In addition, it is preferable that any one or a mixed solvent of NMP, DMF, DMAc, cellusolves, glycols, and ketones is used as the organic solvent in the first step.

In addition, the organic solvent dispersion ceramic sol of the first step, it is preferable that the content of the ceramic has a range of 1 ~ 50wt%.

In addition, the ceramic nanoparticles of the second step may be any one or a mixture of compound ceramics including silica, alumina, magnesium oxide (MgO), boron nitride (BN), and aluminum silicate.

In addition, the reactive silane in the second step is preferably a silane having any one of an amino group, an epoxy group, a cyano group, a hydroxyl group, and a thiol group as a reactive group in a divalent or trivalent alkoxy or acetoxy silane.

In addition, the ceramic nanoparticles of the second step, spherical, needle-like or plate-shaped is used is mixed, in the case of needle-like and plate-like it is preferable that the size is 50 ~ 1000nm.

In addition, the present invention is a technical gist of the organic-inorganic nano fusion insulation varnish prepared above is coated with a metal wire and then heat-dried to form an insulating film on the surface of the metal wire.

According to the above problem solving means, the present invention uniformly disperses ceramic nanoparticles including heat-resistant resins such as polyamideimide, polyesterimide, polyimide, and silica sol, thereby providing arc resistance, electrical insulation characteristics, dielectric characteristics, and heat resistance characteristics. It can provide organic-inorganic nano fusion insulation varnish with excellent adhesion and mechanical properties, and it can be coated on metal wire to manufacture coils with excellent surge durability in high temperature environments. When used, the long-term reliability of these electrical devices is greatly improved.

In particular, motors that require precise control using electric power semiconductors (electric vehicle motors, high-speed elevator motors, high-speed motors, etc.) or wind generators are exposed to high-frequency surges, which rapidly deteriorate the insulation material of the coil. It has an excellent effect on increasing and improving long-term reliability.

1 is a diagram showing the shape of the magnesium oxide particles as ceramic nanoparticles used in one embodiment of the present invention.
2 shows the chemical reaction mechanism of silica (CS) treated with PAI and reactive silane.
Figure 3-Schematic diagram of the cross-section of the organic-inorganic nano fusion insulation varnish prepared using silica sol and PAI in one embodiment of the present invention and a coil in a state in which an insulating coating is formed by coating it on a copper wire.
Figure 4-shows a varnish resin coating scene for producing a coil of the present invention and the coil produced thereby.
5 is a diagram showing the thermal decomposition temperature according to the silica content according to an embodiment of the present invention.
FIG. 6 is a diagram illustrating coils according to silica content (7.5, 10, 12.5) according to an embodiment of the present invention. FIG.
Figure 7-showing the wear resistance according to the silica content according to an embodiment of the present invention.
8-shows the softening resistance characteristics of the insulating varnish produced in accordance with an embodiment of the present invention.
9-shows the withstand voltage characteristics of a coil manufactured according to an embodiment of the present invention.

The present invention provides a nano fusion ceramic sol by dissolving and dissolving ceramic nanoparticles surface-modified with reactive silane in a ceramic sol surface-treated with an organic silane, polyamideimide (PAI) or polyesterimide (polyesterimide) , PEI) and polyamic acid [polyimide (PI) precursor] to disperse in a heat-resistant resin or a mixed resin thereof to prepare an organic-inorganic nano fusion insulating varnish having storage stability and coating properties, the organic-inorganic nano fusion The present invention relates to a coil having a composite insulating varnish coated on a metal wire to improve thermal, mechanical, and electrical properties.

The organic-inorganic nano fusion insulation varnish according to the present invention, the surface treatment of an aqueous or alcohol-based ceramic sol with an organic silane and the addition of a high boiling point organic solvent to replace the solvent, the organic solvent dispersion ceramic sol [solid content (ceramic content 1 ~ 50wt%] and 0.5 ~ 30 weight of ceramic nanoparticles having various shapes (sphere, needle, plate) and particle size of 50 ~ 1000nm with respect to 100 parts by weight of the organic solvent dispersion ceramic sol The second step of preparing an organic reactive nano fusion ceramic sol by adding a portion and dispersing the surface of the ceramic nanoparticles with reactive silane, and any one of polyamideimide (PAI), polyesterimide (PEI) and polyamic acid 1 to 50 parts by weight of the reactive nano fusion ceramic sol is mixed with 100 parts by weight of a heat resistant resin or a mixture resin of two or more of them to prepare an organic-inorganic nano fusion insulation varnish. Claim is made in three stages.

In addition, the present invention is coated with an organic-inorganic nano fusion insulation varnish prepared by the above manufacturing method on a metal wire and then heat-dried to be accompanied by a chemical reaction between the ceramic nanoparticles or between the ceramic nanoparticles and the heat-resistant resin the metal wire The present invention relates to a coil having an insulating coating formed on its surface. When the insulating film is formed on the surface of the metal wire, even in the high-concentration ceramic additive composition of the organic-inorganic nano fusion insulation varnish, the burst resistance to the bending of the coil is greatly increased, and flexibility and adhesion are improved to provide a high quality coil. Will be.

Hereinafter will be described in detail for the preferred embodiment of the present invention.

3 ml of organosilane (trimethoxysilane, MTMS) is added to 100 g of the aqueous or alcohol-based silica (particle size 20 nm, solid content 30 wt%) in the ceramic sol of the first step, and reacted at room temperature for 24 hours. 70-95 ml of organic solvent NMP (or any one of DMF, DMAc, cellusolves, glycols and ketones or mixed solvents thereof) is added and water is removed by distillation under reduced pressure to synthesize organic solvent dispersion ceramic sol. do.

Here, the said organosilane is methyltrimethoxysilane, methyltriethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3-glycidoxypropyl trimethoxy silane, 3-glycidoxypropyltrimethoxysilane to the silane, C ₂ ~ C ₁₂ alkyl group, C ₂ ~ C to ₁₂ any of a silane and a silane having a fluoroalkyl group of one or a mixture of these Silanes may be used.

In addition, the type of the ceramic sol may be used by purchasing silica or alumina sol (colloidal phase) dispersed in water or alcohol, or using a single molecule precursor [precursor; Silica precursors (TEOS), alumina precursors (isopropyl aluminum)] or synthesized from silica or alumina and mixtures thereof. In this embodiment, a silica sol synthesized from alumina precursors (precursor) is used.

In the second step, the organic reactive nano fusion ceramic sol is added with ceramic nanoparticles to the organic solvent dispersion ceramic sol and dispersed while surface-modifying the ceramic nanoparticles with reactive silane, or the reactive silane with the ceramic nanoparticles. Is dispersed in an organic solvent and then added to the organic solvent dispersed ceramic sol to prepare and disperse the ceramic nanoparticles with surface modification.

In this embodiment, ceramic nanoparticles [silica, alumina, magnesium oxide (MgO), boron nitride (BN), aluminum silicate] of 50 to 1,000 nm in size are applied to 100 g of an organic solvent-dispersed ceramic sol (solid content 30wt%). 0.5-30 g of compound ceramics (mica, clay, cordierite, montmorillonite, etc.) are added, and any one of an amino group, an epoxy group, a cyano group, a hydroxyl group and a thiol group is used as a reactive group in a divalent or trivalent alkoxy or acetoxy silane. The reactive silane (eg APTES or GPTES) of 0.01 ~ 1g is added and dispersed by ultrasonic or high pressure homogenized to disperse the ceramic nanoparticles while surface modification to prepare an organic reactive nano fusion ceramic sol.

Figure 1 shows the shape of the magnesium oxide particles used as the ceramic nanoparticles, showing the shape of the plate-shaped particles.

  The reason why the particle size of the ceramic nanoparticles has a distribution or the shape of the ceramic nanoparticles has a spherical shape, a plate shape, a needle shape, a fiber shape, and the like is due to the fact that the insulating varnish gels to form a solid insulating film. To improve aptitude and improve mechanical properties (wear strength, flexural strength). In the case where the shape of the ceramic nanoparticles is needle-like or plate-shaped, ceramics having a size of 50 to 1000 nm are surface-dispersed and dispersed with silane in an organic medium.

Inducing a chemical bond between the surface of the ceramic nanoparticles and the polymer will greatly contribute to improving elongation and wear strength. As a material for inducing a chemical bond between organic and inorganic, it can be implemented by using a silane having a reactive group capable of chemically bonding with a resin, and their chemical reaction mechanism is shown in FIG. 2. Figure 2 shows the chemical reaction mechanism of silica treated with PAI resin and reactive silane.

In the third step, using an organic-based reactive nano-fused ceramic sol and a heat-resistant resin (polyamideimide (PAI), polyesterimide (PEI), polyamic acid (PI precursor) or a mixed resin (brand) thereof) Nano fusion insulation varnish will be prepared.

Here, the heat resistant resin has a wide molecular weight distribution by mixing PAI resins having an average molecular weight of 19,000, 36,000, 54,000, 92,000, or blend PAI and PI (or polyamic acid) to insulate flexibility, tensile strength, and resistance of the varnish. Improves motherhood and more.

In the present invention, using various nano-grade colloidal ceramics and inducing surface modification with reactive silane, even though the ceramic is added in a high content (20 to 30 parts by weight), the insulation varnish has room temperature storage (maintaining viscosity and transparency of 2 months or more) and It is possible to provide excellent organic-inorganic nano fusion insulation varnish with excellent coating workability and satisfying heat resistance, adhesion, elongation, and abrasion resistance required in a solid insulating film. Can be added).

When the organic-inorganic nano fusion insulating varnish is coated on a metal wire, that is, a copper wire or an aluminum wire, and dried under heat, an insulating coating is formed on the surface of the metal wire by a chemical reaction between ceramic nanoparticles and the heat resistant resins. In addition, it is possible to provide a coil coated with an organic-inorganic nano fusion insulation varnish with excellent thermal, mechanical and electrical properties due to the increased bursting resistance to bending and improved flexibility and adhesion even in a high content of ceramics. . Figure 3 shows a schematic diagram of the cross-section of the organic-inorganic nano fusion insulation varnish prepared using silica sol and PAI and a coil in a state in which an insulating coating is formed by coating it on a copper wire as an embodiment of the present invention.

The organic-inorganic nano fusion insulation varnish has almost no increase in viscosity due to the addition of ceramics, so the coating workability is almost similar to that of conventional organic resin varnishes, and multiple coatings are possible using the same equipment. It shows a coil manufactured by. Insulation treatment with such an organic-inorganic hybrid insulation varnish is excellent in heat resistance and insulation properties, it is possible to obtain a coil (wire) that maintains arc resistance and electrical insulation in a high temperature environment.

In order to evaluate the properties of the cured material according to the addition amount of the ceramic nanoparticles in the organic-inorganic nano fusion insulation varnish, the organic-inorganic nano fusion insulation varnish was coated with a predetermined thickness on the surface of the metal sheet for 1 hour, 150 ° C. Curing was carried out in three steps of 15 minutes at 5 ° C and 5 minutes at 220 ° C. Table 1 shows the results of the characteristic evaluation according to the above, and the thermal decomposition temperature for each ceramic content is shown in FIG. 5.

<Physical Properties of PAI-Silica (9: 1) Organic-Inorganic Nano Fusion Insulation Varnish> Characteristic Characteristic value Electric resistivity (volume) 2.0 ¹⁵ Ωcm Arc resistance 240 s Breakdown voltage 13kV / 30㎛ Dielectric constant 3.1 Adhesive Tensile Strength 113 MPa Glass transition temperature 300 ° C

As shown in Table 1, the organic-inorganic nano fusion insulation varnish coated coil according to the present invention has excellent mechanical properties such as adhesion, adhesion, flexibility, flexibility, abrasion resistance, etc. Coils excellent in electrical insulation, arc resistance, and surge durability could be obtained.

FIG. 5 is a data obtained by measuring the thermal decomposition temperature (TGA) of the sample added 0, 10, 20, 30 parts by weight of silica to 100 parts by weight of PAI, there is no weight loss up to 400 ℃ and heat up to 500 ℃ to 600 ℃ The deterioration rate is greatly slowed, so there is a big advantage that the electrical equipment maintains its performance for a considerable time in case of fire.

As described above, the present invention can add ceramic nanoparticles of various sizes and types, and when combined appropriately, spatial integration of ceramic particles is improved when organic-inorganic nano fusion insulation varnish is solidified. When dispersibility in the solvent and storage stability are ensured, the solubility in the heat-resistant resin and the storage stability are excellent. In addition, the addition of ceramic nanoparticles does not increase the viscosity of the organic-inorganic nano-fusion insulation varnish, and chemically bonds between the ceramic nanoparticles or between the ceramic nanoparticles and the heat-resistant resin during heating and drying, thereby causing a high content of the ceramic nanoparticles (30 It is possible to obtain an organic-inorganic nano fusion insulation varnish dispersed in parts by weight).

<Example 2>

Considering the addition of ceramic nanoparticles in the heat-resistant insulating varnish for coils according to the present invention, mechanical properties such as elongation, flexibility, adhesion, etc., and physical properties of insulation strength are reduced depending on the amount of ceramic nanoparticles added. In order to investigate the content of the ceramic nanoparticles, the characteristics of the ceramic nanoparticles were evaluated.

The organic-inorganic nano fusion insulation varnish was manufactured by varying the silica content to 7.5, 10, 12.5, and 20 parts by weight with respect to 100 parts by weight of the heat-resistant resin (PAI) while manufacturing in the same manner as in Example 1, and coated it on a copper wire to coil Was prepared to evaluate the optimum amount of silica sol. Figure 6 shows the silica content (7.5, 10, 12.5) coil.

Table 2 summarizes the coil characteristics produced by coating the organic-inorganic nano fusion insulation varnish according to the silica content in an existing coil production facility. The conductor used was made of copper wire based on the diameter of 0.9mm and the thickness of the insulating film was prepared based on about 0.025mm. As shown in Table 2, in the case of the coil product manufactured by the method of manufacturing the organic-inorganic nano fusion insulation varnish according to the present invention, no problem occurs in the degree of film thickness and the appearance of the film up to the insulation varnish having a silica content of 20 parts by weight. Could confirm.

Coil Characteristics by PAI-Silica Content Inspection items unit standard Silica Content (Weight) 0 7.5 10 12.5 20 1. Appearance - Flawless OK OK OK OK OK 2. Completed appearance mm Max. 0.986 0.950 0.952 0.951 0.952 0.953 3. Conductor diameter mm 0.880-0.920 0.900 0.900 0.900 0.900 0.900 4. Film thickness mm Min. 0.023 0.0250 0.0255 0.0255 0.0260 0.0250 5. Breakdown volt Min. 3,400 8,600 9,500 9,677 11,000 8,234 6. Film scratch - No crack OK OK OK OK OK 7. Adhesiveness - No crack OK OK OK OK Crack 8. Wear resistance N Avg. 7.50 15.00 15.23 15.84 17.33 17.16 9.softening resistance ℃ 300 350 367 430 437 500 10. peel test EA Min. 84 - 172 171 172 157

As shown in Table 2, the wear resistance characteristics (Scrape Resistance) according to the KSC 3170 test method were compared with respect to the coils, and FIG. 7 shows the measurement results. As shown in FIG. The wear resistance gradually increased, but the wear resistance was found to decrease by 20 parts by weight. Compared with the pure PAI (polyamideimide) insulation coating product, it was possible to improve the wear resistance of about 10% in the case of 10 to 12.5 parts by weight of a mixture of silica according to the process of the present invention. However, the increase in the weight to 20 parts by weight caused a decrease in the wear resistance due to problems such as the bonding force between the resin and the nanoparticles and the dispersion of the particles.

And, in order to measure the heat resistance of the coil insulation film of the present invention by testing the heat resistance according to the test method of KSC 3170, the measurement results are shown in FIG. In the case of the pure polyamide-imide insulating film, the softening temperature was 350 ° C., but the value increased as the amount of silica increased, resulting in an increase of 10 parts by weight to 430 ° C. and 20 parts by weight to 500 ° C. This increase in the softening temperature is of interest because it is a great advantage when the heat resistance of the insulation for the power equipment, the thermal resistance rating of class F or more is required.

Breakdown voltage of the insulating film of the present invention was measured in accordance with the KSC 3710 test method is shown in FIG. In general, when the inorganic particles are mixed with the organic resin, most of the withstand voltage characteristics are deteriorated due to chemical defects or heterogeneous dispersion of the inorganic surface. The organic-inorganic nano fusion insulation varnish of the present invention has a molecular level chemical bonding on the surface of the inorganic material and can be dispersed without defects, the insulation strength is increased up to a certain amount.

As shown in FIG. 9, the breakdown voltage of the comparative polyamide-imide resin showed a value of 10 kV, but the value increased slightly to 11 kV in the case of 10 parts by weight of silica added at the same coating thickness. These results are different from the nanocomposites mixed by physical methods. However, as the mixing amount of silica increased by 12.5 parts by weight, the value gradually decreased, and when the mixing amount increased to 20 parts by weight, it decreased below 10 kV. This shows that it is possible to control the breakdown voltage characteristics through the composition selection in the nano-fusion insulation varnish.

As described above, the storage stability and coating workability of the insulating varnish according to the present invention have no problem up to 20 parts by weight, but showed a characteristic of slightly decreasing from 10 parts by weight in elongation, adhesion, and the like, and particularly wear resistance or heat resistance (softening resistance) are required. In the case, it was estimated that 10% by weight of additional additions were possible.

As described above, the present invention treats the surface of the ceramic particles with reactive silane while adding ceramic nanoparticles of various sizes and types, and is excellent in dispersibility and storage stability in organic solvents and resins, and ceramic nanoparticles are 20 to 30 wt. Even when dispersed to a high content, there is almost no increase in viscosity and coating property is excellent. When the nano fusion insulation varnish gels through the optimum combination of nanoparticle size and shape, the spatial integration of ceramic nanoparticles is maximized, and during drying The chemical bonding between the ceramic nanoparticles or between the ceramic nanoparticles and the heat-resistant resin occurs to obtain an organic-inorganic nano fusion insulating varnish having excellent electrical and mechanical properties.

Claims (9)

A first step of synthesizing an organic solvent-dispersed ceramic sol by surface-treating an aqueous or alcohol-based ceramic sol with an organic silane and adding an organic solvent to replace water or an alcohol-based solvent with an organic solvent;
Surface modification of the ceramic nanoparticles with reactive silanes by adding 0.5-30 parts by weight of ceramic nanoparticles containing the same or different types of ceramics contained in the organic solvent dispersion ceramic sol with respect to 100 parts by weight of the organic solvent dispersion ceramic sol. Dispersing while preparing the organic reactive nano fusion ceramic sol;
A third step of preparing the organic-inorganic nano fusion insulation varnish by mixing the reactive nano fusion ceramic sol with a heat-resistant resin of any one of polyamideimide, polyester imide, and polyamic acid or a mixture resin of two or more thereof; Method for producing an organic-inorganic nano fusion insulation varnish comprising a. The method of claim 1, wherein the water-based or alcohol-based ceramic sol of the first step,
A method for producing an organic-inorganic nano-fusion insulating varnish, characterized in that any one of a silica or alumina of aqueous or alcoholic colloids, and a silica, alumina and a mixture thereof synthesized from a single molecule precursor. The method of claim 1, wherein the organosilane of the first step,
Methyltrimethoxysilane, Methyltriethoxysilane, Vinyltrimethoxysilane, Vinyltriethoxysilane, Phenyltrimethoxysilane, Phenyltriethoxysilane, 3-Glycidoxypropyltrimethoxysilane, 3-Gly in sidok during propyl triethoxysilane, C ₂ ~ C alkyl group of up to _12, the presence or absence of either or characterized in that a mixture of silane those of the silane and the silane having a fluoroalkyl group of C to ₂ ~ C ₁₂ group Method for producing nano fusion insulation varnish. The method of claim 1, wherein the organic solvent of the first step,
NMP, DMF, DMAc, cellusolves, glycols and ketones any one or a mixed solvent thereof is used for producing an organic-inorganic nano fusion insulation varnish characterized in that used. The method of claim 1, wherein the organic solvent dispersion ceramic sol of the first step,
Method for producing an organic-inorganic nano fusion insulation varnish characterized in that the content of the ceramic has a range of 1 ~ 50wt%. The method of claim 1, wherein the ceramic nanoparticles of the second step,
A method for producing an organic-inorganic nano fusion insulation varnish comprising silica, alumina, magnesium oxide (MgO), boron nitride (BN), and any one or a mixture of compound ceramics including aluminum silicate. The method of claim 1, wherein the reactive silane of the second step,
A divalent or trivalent alkoxy or acetoxy silane is a silane having any one of an amino group, an epoxy group, a cyano group, a hydroxyl group, and a thiol group as a reactive group. The method of claim 1, wherein the ceramic nanoparticles of the second step,
A spherical, needle-like or plate-like mixture is used, and in the case of needle-shaped and plate-like, the manufacturing method of the organic-inorganic nano fusion insulation varnish characterized in that the size 50 ~ 1000nm. delete

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