JP-2026514367-A - Method for manufacturing a coating composition

Abstract

A method for producing a coating composition according to one embodiment of this application includes the steps of: mixing a zirconium precursor and a first polyhydric alcohol to produce a first solution; adding a binder to the first solution to produce a second solution; and adding ethanol, polysorbic acid, and a second polyhydric alcohol to the second solution to produce a third solution, satisfying formula 1 above.

Inventors

• ウォンベ・ビュン
• スジ・キム
• ヨンソン・キム
• ジェ・スン・チェ

Assignees

• エルジー・ケム・リミテッド

Dates

Publication Date

20260511

Application Date

20250106

Priority Date

20240112

Claims (10)

1. A step of preparing a first solution by mixing a zirconium precursor and a first polyhydric alcohol; The process includes the steps of: adding a binder to the first solution to produce a second solution; and adding ethanol, polysorbic acid, and a second polyhydric alcohol to the second solution to produce a third solution. A method for producing a coating composition that satisfies the following formula 1: [Formula 1] (Molar concentration of Zr in the second solution) × (Weight ratio of the second solution to the total weight of the second solution, ethanol, and polysorbic acid) < 0.11.
2. The method for producing the coating composition according to claim 1, wherein the zirconium precursor is zirconium propoxide.
3. The method for producing the coating composition according to claim 1, wherein the first polyhydric alcohol comprises one or more of 1,4-butanediol, diethylene glycol, and triethylene glycol.
4. The method for producing the coating composition according to claim 1, wherein the step of producing the first solution is carried out at a temperature of 70°C to 130°C.
5. The method for producing the coating composition according to claim 1, wherein the binder contains polyvinylpyrrolidone (PVP).
6. The method for producing the coating composition according to claim 1, wherein the second polyhydric alcohol contains ethylene glycol.
7. The method for producing the coating composition according to claim 1, wherein the pH of the coating composition is 6.5 to 7.5.
8. The method for producing the coating composition according to claim 1, wherein the coating composition is applied to a passivation layer for a metal structure, a high-refractive index coating layer for a glass substrate, a heat shielding coating layer for a gas turbine, or a bioceramic coating layer for an artificial bone.
9. A method for producing a zirconium dioxide coating layer, comprising the steps of: preparing a substrate; and coating the surface of the substrate with a coating composition produced according to any one of claims 1 to 7, drying and firing it to form a zirconium dioxide coating layer on the surface of the substrate.
10. The method for producing a zirconium dioxide coating layer according to claim 9, wherein the zirconium dioxide coating layer is a passivation layer for a metal structure, a high-refractive index coating layer for a glass substrate, a heat shielding coating layer for a gas turbine, or a bioceramic coating layer for artificial bone.

Description

This application claims the benefits as of the filing date of Korean Patent Application No. 10-2024-0005139, filed with the Korean Intellectual Property Office on January 12, 2024, and all its contents are incorporated herein by reference. This application relates to a method for producing a coating composition. Metal structures can be applied to various fields such as weight reduction, sound insulation, thermal energy absorption, filtration, and catalysis, but in some cases, passivation is required. Generally, it is easy to coat a passivation layer onto a flat substrate such as glass or silicon, but the surface of the aforementioned metal structures is extremely uneven, making it difficult to form a uniform passivation layer on such a surface. Furthermore, zirconium dioxide has a very high melting point and a relatively low coefficient of thermal expansion, making it highly resistant to chemical reactions and environmental degradation. Due to these properties, it can be used as a passivation material in various application fields to protect material surfaces and prevent chemical degradation such as corrosion and oxidation. Therefore, in this technical field, there is a need for the development of techniques for forming a passivation layer in metal structures using zirconium dioxide. This figure shows a surface SEM image of a metal structure coated according to Example 1.This figure shows a surface SEM image of a metal structure coated according to Example 6.This figure shows an XRD image of a powder sample obtained by heat-treating the dried powder of the coating composition of Example 8 at 700°C for 3 hours.This figure shows an SEM image of a powder sample obtained by heat-treating the dried powder of the coating composition of Example 8 at 700°C for 3 hours.This figure shows a surface SEM image of a metal structure coated according to Example 8.This figure shows a high-magnification SEM image of the passivation film coated according to Example 8.This figure shows a surface SEM image of a metal structure coated according to Comparative Example 2.This figure shows a surface SEM image of a metal structure coated according to Comparative Example 3.This figure shows a surface SEM image of a metal structure coated according to Comparative Example 5. The following provides a more detailed explanation of this specification. In this specification, when we say that one member is located "on" another member, this includes not only cases where one member is in contact with another member, but also cases where another member exists between the two members. In this specification, when a part is said to "include" a component, unless otherwise specified, this means that it may include other components rather than excluding them. A method for producing a coating composition according to one embodiment of this application includes the steps of: mixing a zirconium precursor and a first polyhydric alcohol to produce a first solution; adding a binder to the first solution to produce a second solution; and adding ethanol, polysorbic acid, and a second polyhydric alcohol to the second solution to produce a third solution, satisfying the following formula 1. [Formula 1] (Molar concentration of Zr in the second solution) × (Weight ratio of the second solution to the total weight of the second solution, ethanol, and polysorbic acid) < 0.11 A method for producing a coating composition according to one embodiment of this application includes the step of mixing a zirconium precursor and a first polyhydric alcohol to produce a first solution. The above-mentioned zirconium precursor is a precursor of zirconium dioxide, which constitutes the coating layer, and its content can be adjusted to control the molar ratio of zirconium. The above-mentioned zirconium precursor may be, but is not limited to, zirconium propoxide. The first polyhydric alcohol described above may contain one or more of 1,4-butanediol, diethylene glycol, and triethylene glycol. Furthermore, the first polyhydric alcohol may contain 1,4-butanediol and diethylene glycol simultaneously, or 1,4-butanediol and triethylene glycol simultaneously, or 1,4-butanediol, diethylene glycol, and triethylene glycol simultaneously. The step of producing the first solution described above can be carried out at a temperature of 70°C to 130°C, or at a temperature of 80°C to 100°C. If the step of producing the first solution is carried out at a temperature below 70°C, the zirconium precursor may not dissolve well, which is undesirable. Furthermore, if the step of producing the first solution exceeds 130°C, particle precipitation due to hydration reaction may occur, which is also undesirable. A method for producing a coating composition according to one embodiment of this application includes the step of adding a binder to the first solution to produce a second solution. According to one embodiment of this application, by adding a binder to the first solution, the adhesion of the manufactu