KR102444418B1 - Insulating coatings with improved abrasion resistance, adhesiveness, heat resistance and corrosion resistance - Google Patents

Abstract

The present invention provides an insulating coating agent having improved wear resistance, adhesion, heat resistance and corrosion resistance, comprising: 30 to 70 parts by weight of an organic resin; 15 to 45 parts by weight of inorganic particles; 4 to 8 parts by weight of a dispersant for dispersing the organic resin and the inorganic particles; 5 to 10 parts by weight of an anti-swelling agent for preventing swelling of the insulating coating; 0.1 to 0.2 parts by weight of a surface slip agent for improving the slip of the insulating coating agent; 0.3 to 0.6 parts by weight of an antifoaming agent for preventing bubble formation; 1 to 2 parts by weight of a defoaming agent for defoaming the generated bubbles; It is a technical gist to include 2 to 4 parts by weight of a flow control agent for controlling the flow of the insulating coating agent. Thereby, effects such as high abrasion resistance, high adhesion, high heat resistance and high corrosion resistance can be obtained through appropriate mixing of inorganic particles and organic resin having high mechanical properties as well as insulating properties.

Description

Insulating coatings with improved abrasion resistance, adhesiveness, heat resistance and corrosion resistance}

The present invention relates to an insulating coating agent with improved abrasion resistance, adhesion, heat resistance and corrosion resistance, and more particularly, high abrasion resistance, high adhesion, and high heat resistance through appropriate mixing of inorganic particles with organic resins having insulation and high mechanical properties. And it has high corrosion resistance and relates to an insulating coating agent with improved wear resistance, adhesion, heat resistance and corrosion resistance showing high insulating properties.

Organic resins with excellent insulating properties, such as polyepoxy resin, polyamideimide resin, and fluororesin, have excellent lubricity, moisture resistance, chemical resistance, moldability, and coating properties in addition to insulating properties. Therefore, it is used in various applications such as electrical and electronic, machinery, automobile, marine, and ship that require physical properties such as electrical insulation, corrosion resistance, and abrasion resistance.

For these organic resins, the application of the resin should be different according to the difference in physical properties required for each application. It is preferred for tea coating applications. However, in the case of an epoxy coating film having a high surface hardness in the coating layer that requires a high pressure load on the insulating coating layer, the shock absorption against the strong pressure load is weak, so peeling and cracking of the entire coating layer may occur. Therefore, since it is possible to reinforce and improve not only hardness but also lubricity in order to reinforce this part, the addition of a fluororesin and thus a change in the curing mechanism of the binder resin are required.

On the other hand, polyamideimide resin, which is a typical thermoplastic insulating binder resin, has excellent advantages unique to thermoplastic resins, such as sufficient absorption from external pressure, high surface adhesion to the substrate, high corrosion resistance, and high thermal stability. However, since the surface strength is weaker than that of the thermosetting resin, it is necessary to improve the strength for the application of mechanical products and products requiring surface strength.

Prior art 'Korea Patent Office Publication No. 10-2004-0048572 Method for Manufacturing Self-Lubricating Polyamide-imide Varnish' and 'Korea Patent Office Publication No. 10-2004-0013691 High-adhesive polyamide varnish including polyamideimide resin' There is a method for preparing a mid varnish, which includes trimellitic anhydride and aromatic diisocyanate in an equivalent ratio of 1:0.9 to 1:1.1, and aminosiloxane to the trimellitic anhydride to control molecular weight and improve lubricity. a first step of preparing polyamide carbamate by adding it in an equivalent ratio of 1:0.01 to 1:0.1 and polymerization at -10 to 180° C. for 0.5 to 12 hours in the presence of an organic solvent; a second step of imidizing the polyamide carbamate to prepare a polyamideimide; and a third step of dissolving the polyamideimide by introducing an aromatic hydrocarbon-based solvent for viscosity control. Such prior art is a technology whose purpose is to improve lubricity or adhesion, and is far from the high wear resistance, high adhesion, high heat resistance and high corrosion resistance desired in the present invention.

Therefore, it is important to evenly mix the above-mentioned thermosetting resin and thermoplastic resin in order to have high abrasion resistance, high adhesion, high heat resistance and high corrosion resistance together with insulating properties. In addition, by prescribing insulating inorganic particles such as oxides such as silica and titania, and nitrides such as silicon nitride and titanium nitride with insulating resin to compensate for the lack of physical properties due to the combination of organic resin alone, high mechanical and chemical properties as well as excellent electrical insulation properties It is required to perform simultaneously.

Korean Patent Office Laid-Open Patent No. 10-2004-0048572 Korean Patent Office Laid-Open Patent No. 10-2004-0013691

Therefore, an object of the present invention is to have high abrasion resistance, high adhesion, high heat resistance and high corrosion resistance through appropriate mixing of organic resin and inorganic particles having insulation and high mechanical properties, and exhibit high insulation properties such as abrasion resistance, adhesion, heat resistance and To provide an insulating coating agent with improved corrosion resistance.

The above object, 30 to 70 parts by weight of an organic resin; 15 to 45 parts by weight of inorganic particles; 4 to 8 parts by weight of a dispersant for dispersing the organic resin and the inorganic particles; 5 to 10 parts by weight of an anti-swelling agent for preventing swelling of the insulating coating; 0.1 to 0.2 parts by weight of a surface slip agent for improving the slip of the insulating coating agent; 0.3 to 0.6 parts by weight of an antifoaming agent for preventing bubble formation; 1 to 2 parts by weight of a defoaming agent for defoaming the generated bubbles; It is achieved by an insulating coating agent with improved wear resistance, adhesion, heat resistance and corrosion resistance, characterized in that it contains 2 to 4 parts by weight of a flow control agent for controlling the flow of the insulating coating agent.

Here, the organic resin is 65 parts by weight of the sum of 20 parts by weight of polyamideimide resin and 45 parts by weight of polyepoxy resin, 20 parts by weight of the inorganic particles, 4.4 parts by weight of the dispersant, 6 parts by weight of the anti-bulge agent, and 0.15 parts by weight of the surface slip agent It is preferable to include parts by weight, 0.45 parts by weight of the antifoaming agent, 1.5 parts by weight of the defoaming agent, and 2.5 parts by weight of the flow control agent.

In addition, the organic resin includes a polyimideamide resin and a polyepoxy resin, the polyimideamide resin and the polyepoxy resin are each dispersed in a dispersion solvent in an amount of 30 to 40 wt%, and the dispersion solvent is n-methyl-2 -Pyrrolidone (n-methyl-2-pyrrolidone) is preferable.

According to the above-described configuration of the present invention, effects such as high abrasion resistance, high adhesion, high heat resistance and high corrosion resistance can be obtained through appropriate mixing of inorganic particles and organic resin having high mechanical properties as well as high insulating properties.

Hereinafter, the insulation coating agent having improved wear resistance, adhesion, heat resistance and corrosion resistance according to the present invention will be described in detail.

A coating layer can be formed on various products to improve insulation, abrasion resistance, adhesion, heat resistance and corrosion resistance. The insulating coating agent includes an organic resin including polyepoxy resin and polyamideimide resin, inorganic particles made of oxide or nitride, a dispersing agent used for dispersing the organic resin and inorganic particles, a defoaming body, a defoaming agent, and flowability. control agents, slip agents and solvents. In some cases, it may further include a leveling agent for leveling control of the surface of the coating film.

The insulating organic resin contains 30 to 70 parts by weight based on 100 parts by weight of the total insulating coating agent. The insulating organic resin acts as a binding agent to be easily adsorbed to the products to be coated, and includes polyamideimide resin and polyepoxy resin. When such an organic resin contains less than 30 parts by weight based on 100 parts by weight of the total insulating coating agent, the organic resin does not properly perform the binding role of the insulating coating agent. The downside is that you can't.

Here, the organic resin except for the polyamideimide resin and the polyepoxy resin may be variously applied such as a polyurethane resin, a polycarbonate resin, a polyethylene resin, a polyester resin, a polyvinyl chloride resin, and a fluorine resin.

The polyamideimide resin included in the organic resin is included in an amount of 20 to 60 parts by weight based on 100 parts by weight of the total insulating coating agent. When the amount of polyamideimide resin is less than 20 parts by weight, it is difficult to see effects such as absorption of external pressure, high surface adhesion, corrosion prevention function, and thermal stability, which are characteristics of polyimideamide resin. In addition, when the polyamide-imide resin exceeds 60 parts by weight, since it is a thermoplastic resin having lower strength than a thermosetting resin, there is a disadvantage in that the strength of the coating layer coated with the insulating coating agent is somewhat insufficient.

Polyepoxy resin is included in an amount of 10 to 50 parts by weight based on 100 parts by weight of the total insulation coating agent. When the amount of polyepoxy resin is less than 10 parts by weight, it cannot properly exhibit the advantages of high adhesion, corrosion prevention, and high surface hardness, which are the advantages of polyepoxy resin. Since the shock absorption is weak, peeling of the entire coating layer may occur.

Such an organic resin is preferably obtained in a state of being dispersed in a dispersion solvent to facilitate coatability, and the dispersion solvent is preferably n-methyl-2-pyrrolidone, and organic The solid content of the resin is preferably based on 30 to 40 wt%. Moreover, it is preferable to apply a molecular weight of 500 or more of organic resin. When the molecular weight of the organic resin is less than 500, the organic resin may not properly function as a binder. When the amount of the organic resin in the dispersion solvent is less than 30 wt %, it takes a lot of repetition and coating time to coat the coating agent, and when it exceeds 40 wt %, it is difficult to uniformly coat the organic resin.

15 to 45 parts by weight of inorganic particles for improving mechanical properties while having insulating properties are included. When the amount of inorganic particles is less than 15 parts by weight, the insulation is reduced, making it difficult to apply to products such as sheets or washers that require insulation. . These inorganic particles include metal oxides such as silica, zirconia, titania, and alumina, or metal nitrides such as silicon nitride and titanium nitride, and mixtures thereof. It is preferably selected from the group consisting of. The particle size of the inorganic particles may vary depending on the size of the coating film, and the inorganic particles having a size of several nanometers to several tens of micrometers are preferable.

4 to 8 parts by weight of a dispersant for dispersing the organic resin and inorganic particles is included. If the dispersant is less than 4 parts by weight, the organic resin and inorganic particles may not be properly dispersed and may agglomerate. The dispersant is preferably any one of organic polymers including a polymer having a hydrophilic functional group for pigment wetting and inorganic particle wetting.

When the coating layer is dried after applying the coating agent, 5 to 10 parts by weight of the anti-swelling agent for preventing swelling of the coating layer is preferably included. When the anti-blowing agent is less than 5 parts by weight, it is impossible to properly control the swelling of the coating layer, and when it exceeds 10 parts by weight, the physical properties of the coating agent change to properties that are not easy to coat. The anti-bulge agent is preferably any one of high boiling point solvents comprising a combination of aromatic, ketone, and ester groups having a high boiling point.

The surface slip agent for surface slip control refers to a silicone-based or non-silicone-based additive added to improve the slip properties and surface tension of a product through improvement of the slip properties of the coating layer and reduction of surface tension. Here, the surface slip agent may be included in an amount of 0.1 to 0.2 parts by weight based on the total weight of the coating agent. When the amount of the surface slip agent is less than 0.1 parts by weight, the effect of the surface slip agent is insignificant, and when it exceeds 0.2 parts by weight, the amount of the surface slip agent is large compared to other materials, so that other materials cannot work properly.

Here, the silicone-based surface slip agent is dimethylmethoxysilane, phenyl trimethoxysilane, methyl trimethoxysilane, phenyl trimethoxysilnae, 3-glycidoxy It is preferable that at least one of silane series and silicone resin series such as propyl trimethoxysilane (3-glycidoxypropyl trimethoxysilane) and methyl 3-glycidoxylpropryl dimethoxysilane (methyl 3-glycidoxylpropryl dimethoxysilane). In addition, non-silicone-based surface slip agents include vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, methyl acrylate, and ethyl acryl. Ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate , 1,6-hexanediol diacrylate (1,6-hexanediol diacrylate) is preferably any one.

The antifoaming agent refers to a silicone-based or non-silicone-based additive added to improve the appearance of the coating layer through bubble control of the coating agent. Here, the antifoaming agent is preferably included in an amount of 0.3 to 0.6 parts by weight based on the total weight. When the antifoaming agent is less than 0.3 parts by weight, the effect of the antifoaming agent is insignificant because a very small amount of the antifoaming agent is contained.

Like the antifoaming agent, it is included in 1 to 2 parts by weight to prevent bubbles and swelling of the solution generated during the coating agent manufacturing and coating process. The defoaming agent is made of at least one of silicone, acrylic, and fluorine, and in addition to defoaming, a surface leveling effect can be seen. When the amount of the defoaming agent is less than 1 part by weight, it is difficult to see the defoaming effect and the leveling effect, and when it exceeds 2 parts by weight, the mixing ratio with other materials is not harmonious.

The flow control agent for controlling the flow property of the coating agent according to the shape of the coating layer is made of at least one of a high molecular weight urea-modified medium-polar polyamide and a non-polar polyamide. This flow control agent consists of 2 to 4 parts by weight based on the total weight. When the amount is less than 2 parts by weight, the flowability cannot be smoothly controlled, and a problem in which the coated coating agent flows may occur, and it may exceed 4 parts by weight. In this case, the viscosity of the coating agent increases, so that a uniform coating is not achieved.

The insulating coating agent having such a configuration may further include inorganic and organic pigments in order to change the external color of the insulating coating layer in some cases.

In the following examples, the blending ratio according to the type and amount of the binder resin including the solvent, the inorganic particles, the dispersant, the swelling inhibitor, the surface slip agent, the antifoaming agent, the defoaming agent, the flow control agent, and the pigment is shown.

<Example 1>

32 wt% of solid content dispersed in n-methyl-2-pyrrolidone as binder resin 45 wt% of polyamideimide resin dispersed in n-methyl-2-pyrrolidone as solvent 30 wt% of solid content dispersed in solvent n-methyl-2-pyrrolidone % Polyepoxy resin 20 parts by weight, crystalline silica 20 parts by weight with an average particle size of 2 μm, 4.4 parts by weight of a material dispersing agent for organic/inorganic particles, 6 parts by weight of an anti-swelling agent of the coating film when drying, 0.15 parts by weight of a surface slip agent, an antifoaming agent After preparing and mixing a coating solution containing 0.45 parts by weight, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating to a thickness of about 50 μm on a 10 cm × 10 cm stainless steel (SUS) plate, followed by a dry curing process In order to evaluate the physical properties of the sample, it is coated, dried, and cured to a thickness of about 50 μm on an actual standardized flange washer, and then the prepared insulation coated washer is connected to the flange with a strong pressure and then the insulation (insulation resistance) is measured and After dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

<Example 2>

32wt% of solid content dispersed in n-methyl-2-pyrrolidone, a binder resin, 20 parts by weight of polyamideimide resin, 30wt of solid content dispersed in solvent n-methyl-2-pyrrolidone % Polyepoxy resin 45 parts by weight, crystalline silica 20 parts by weight with an average particle size of 2 μm, 4.4 parts by weight of a material dispersing agent for organic/inorganic particles, 6 parts by weight of an anti-swelling agent of the coating film when drying, 0.15 parts by weight of a surface slip agent, an antifoaming agent After preparing and mixing a coating solution containing 0.45 parts by weight, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating to a thickness of about 50 μm on a 10 cm × 10 cm stainless steel (SUS) plate, followed by a dry curing process In order to evaluate the physical properties of the sample, it is coated, dried, and cured to a thickness of about 50 μm on an actual standardized flange washer, and then the prepared insulation coated washer is connected to the flange with a strong pressure and then the insulation (insulation resistance) is measured and After dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

<Example 3>

32wt% of solids dispersed in n-methyl-2-pyrrolidone as binder resin 0 parts by weight of polyamideimide resin, 30wt of solids dispersed in solvent n-methyl-2-pyrrolidone % 65 parts by weight of polyepoxy resin, 20 parts by weight of crystalline silica having an average particle size of 2 μm, 4.4 parts by weight of a material dispersing agent for organic/inorganic particles, 6 parts by weight of an anti-swelling agent of the coating film when drying, 0.15 parts by weight of a surface slip agent, an antifoaming agent After preparing and mixing a coating solution containing 0.45 parts by weight, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating to a thickness of about 50 μm on a 10 cm × 10 cm stainless steel (SUS) plate, followed by a dry curing process In order to evaluate the physical properties of the sample, it is coated, dried, and cured to a thickness of about 50 μm on an actual standardized flange washer, and then the prepared insulation coated washer is connected to the flange with a strong pressure and then the insulation (insulation resistance) is measured and After dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

<Example 4>

32wt% of solid content dispersed in n-methyl-2-pyrrolidone as binder resin 65wt% of solid content dispersed in solvent n-methyl-2-pyrrolidone as polyamideimide resin 30wt % 0 parts by weight of polyepoxy resin, 20 parts by weight of crystalline silica having an average particle size of 2 μm, 4.4 parts by weight of a material dispersing agent for organic/inorganic particles, 6 parts by weight of an anti-swelling agent for the coating film when drying, 0.15 parts by weight of a surface slip agent, an antifoaming agent After preparing and mixing a coating solution containing 0.45 parts by weight, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating to a thickness of about 50 μm on a 10 cm × 10 cm stainless steel (SUS) plate, followed by a dry curing process In order to evaluate the physical properties of the sample, it is coated, dried, and cured to a thickness of about 50 μm on an actual standardized flange washer, and then the prepared insulation coated washer is connected to the flange with a strong pressure and then the insulation (insulation resistance) is measured and After dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

<Example 5>

32wt% of solid content dispersed in n-methyl-2-pyrrolidone as binder resin 55 wt% of polyamideimide resin dispersed in n-methyl-2-pyrrolidone as solvent 30wt solid content dispersed in solvent n-methyl-2-pyrrolidone % 30 parts by weight of polyepoxy resin, 0 parts by weight of crystalline silica having an average particle size of 2 μm, 4.4 parts by weight of a material dispersing agent for organic and inorganic particles, 6 parts by weight of an anti-swelling agent for the coating film when drying, 0.15 parts by weight of a surface slip agent, an antifoaming agent After preparing and mixing a coating solution containing 0.45 parts by weight, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating to a thickness of about 50 μm on a 10 cm × 10 cm stainless steel (SUS) plate, followed by a dry curing process In order to evaluate the physical properties of the sample, it is coated, dried, and cured to a thickness of about 50 μm on an actual standardized flange washer, and then the prepared insulation coated washer is connected to the flange with a strong pressure and then the insulation (insulation resistance) is measured and After dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

<Example 6>

32 wt% of solid content dispersed in n-methyl-2-pyrrolidone as binder resin 45 wt% of polyamideimide resin dispersed in n-methyl-2-pyrrolidone as solvent 30 wt% of solid content dispersed in solvent n-methyl-2-pyrrolidone % 20 parts by weight of polyepoxy resin, 10 parts by weight of crystalline silica having an average particle size of 2 μm, 10 parts by weight of green inorganic pigment, 4.4 parts by weight of a material dispersing agent for organic and inorganic particles, 6 parts by weight of an anti-swelling agent for the coating film when drying, the surface After preparing and mixing a coating solution containing 0.15 parts by weight of a slip agent, 0.45 parts by weight of an antifoaming agent, 1.5 parts by weight of a defoaming agent, and 2.5 parts by weight of a flow control agent, spray coating on a 10cm × 10cm stainless steel (SUS) plate to a thickness of about 50㎛. In order to evaluate the physical properties of the samples that have undergone the post-dry curing process, the insulating coating washer prepared after coating, drying, and curing to a thickness of about 50 μm on a standardized flange washer is fastened to the flange with strong pressure and then insulating After (insulation resistance) measurement and dismantling, peeling and pressing of the washer coating were measured and shown in Table 1.

Example 10cm × 10cm SUS coating Flange fastening washer coating Insulation Resistance
(at2.5KV) peeling Hardness Insulation Resistance
(at2.5KV) peeling Hardness degree of pressure One >200GΩ 5B ○ ~15MΩ ◎ ○ ○ 2 >200GΩ 5B ◎ ~15MΩ △ ◎ ◎ 3 >200GΩ 5B ◎ ~15MΩ × ◎ ◎ 4 >200GΩ 5B △ ~15MΩ ○ △ △ 5 >200GΩ 5B △ ~15MΩ ◎ △ ○ 6 >200GΩ 5B ○ ~15MΩ ◎ ○ ◎

(◎: Very good, ○: Good, △: Normal, ×: Poor)

As shown in Table 1, it was confirmed that the physical properties of the prepared insulating coating layer were generally excellent, and in particular, the insulation resistance showed a very high value regardless of the material composition in all examples. In the peeling part, the peeling in the SUS coating was in a very good state of 5B or more in the configuration of the previous embodiment, but in the case of the flange fastening washer coating, which requires a very large upper load, the higher the content of the thermosetting polyepoxy resin, the higher the curing density of the coating film. It was confirmed that the whole peeling phenomenon was confirmed, and it was confirmed that the application was somewhat difficult. In the hardness part, when the content of the thermosetting polyepoxy resin was increased and the content of the inorganic powder was increased, it showed an excellent hardness value, and similarly, it was confirmed that the degree of pressing during the flange test showed almost the same tendency.

In addition, the most preferable mixing ratio of the coating agent through these examples is 20 parts by weight of the coating agent of Example 2, 65 parts by weight of an insulating organic resin composed of 45 parts by weight of polyepoxy resin, 20 parts by weight of inorganic particles, 4.4 parts by weight of a material dispersant for dispersing resin and inorganic particles, 6 parts by weight of a coating solution anti-swelling agent for coating film when drying, 0.15 parts by weight of a surface slip agent for controlling surface slip, 0.45 parts by weight of an antifoaming agent, It was confirmed that it was 1.5 parts by weight of the cloth and 2.5 parts by weight of the flow control agent.

Claims (8)

In the insulation coating agent with improved abrasion resistance, adhesion, heat resistance and corrosion resistance,
30 to 70 parts by weight of an organic resin;
15 to 45 parts by weight of inorganic particles;
4 to 8 parts by weight of a dispersant for dispersing the organic resin and the inorganic particles;
5 to 10 parts by weight of an anti-swelling agent for preventing swelling of the insulating coating;
0.1 to 0.2 parts by weight of a surface slip agent for improving the slip of the insulating coating agent;
0.3 to 0.6 parts by weight of an antifoaming agent for preventing bubble formation;
1 to 2 parts by weight of a defoaming agent for defoaming the generated bubbles;
Containing; 2 to 4 parts by weight of a flow control agent for controlling the flow of the insulating coating agent;
The organic resin includes a polyimideamide resin and a polyepoxy resin,
The polyimideamide resin and the polyepoxy resin are each dispersed in a dispersion solvent in an amount of 30 to 40 wt%. An insulating coating agent having improved abrasion resistance, adhesion, heat resistance and corrosion resistance. The method of claim 1,
The organic resin is 65 parts by weight of a total of 20 parts by weight of polyamide-imide resin and 45 parts by weight of polyepoxy resin, 20 parts by weight of the inorganic particles, 4.4 parts by weight of the dispersant, 6 parts by weight of the anti-bulge agent, and 0.15 parts by weight of the surface slip agent , 0.45 parts by weight of the antifoaming agent, 1.5 parts by weight of the defoaming agent, and 2.5 parts by weight of the flow control agent. delete The method of claim 1,
The dispersion solvent is n-methyl-2-pyrrolidone (n-methyl-2-pyrrolidone) abrasion resistance, adhesion, heat resistance and corrosion resistance improved insulation coating agent, characterized in that. The method of claim 1,
The inorganic particles are an insulating coating agent with improved wear resistance, adhesion, heat resistance and corrosion resistance, characterized in that selected from the group consisting of metal oxides, metal nitrides and mixtures thereof. 6. The method of claim 5,
The metal oxide is an insulating coating agent having improved wear resistance, adhesion, heat resistance and corrosion resistance, characterized in that it is selected from the group consisting of silica, zirconia, titania, alumina, and mixtures thereof. . 6. The method of claim 5,
The metal nitride is an insulating coating agent with improved wear resistance, adhesion, heat resistance and corrosion resistance, characterized in that selected from the group consisting of silicon nitride, titanium nitride, and a mixture thereof. The method of claim 1,
The surface slip agent is silicone-based or non-silicone-based,
The silicone-based surface slip agent is dimethylmethoxysilane, phenyl trimethoxysilane, methyl trimethoxysilane, phenyl trimethoxysilnae, 3-glycidoxy It is selected from the group consisting of propyltrimethoxysilane (3-glycidoxypropyl trimethoxysilane), methyl 3-glycidoxylpropryl dimethoxysilane, and mixtures thereof,
The non-silicone-based surface slip agent is vinylidene fluoride, tetrafluoroethylene, hexafluoropropylene, vinyl fluoride, methyl acrylate, ethyl acrylic Ethyl acrylate, butyl acrylate, 2-ethyl hexyl acrylate, isooctyl acrylate, 2-hydroxyethyl acrylate , 1,6-hexanediol diacrylate (1,6-hexanediol diacrylate) and a mixture thereof, characterized in that selected from the group consisting of abrasion resistance, adhesion, heat resistance and corrosion resistance improved insulation coating agent.