KR-102959952-B1 - Conductive polymers composition for infrared shielding and heat shielding and coating films using the same

Abstract

The present invention relates to a conductive polymer composition for infrared shielding and heat blocking and a coating film using the same. More specifically, the invention relates to a conductive polymer composition for infrared shielding and heat blocking and a coating film using the same that can simultaneously secure high transparency and long-term stability while having excellent infrared shielding and heat blocking functions. Through this, it can be utilized as a window tinting film for vehicles and buildings to contribute to improved energy efficiency and indoor temperature control, and in the defense sector, it can also be utilized as a camouflage material for evading infrared detection. Furthermore, the coating film according to the present invention can be effectively utilized in various fields requiring both high transparency and heat blocking functions, such as architectural glass and vehicle windows, as well as display panel protective layers, transparent covers for wearable devices, solar panel protective layers, high-performance sensor covers, aerospace and unmanned aerial vehicle exterior materials, and smart window systems.

Inventors

• 진성호
• 김혜린
• 송동현
• 유진수
• 김현돈

Assignees

• 주식회사 케이알첨단전자재료

Dates

Publication Date

20260508

Application Date

20250805

Claims (11)

1. A resin composition comprising an acrylate-based or cellulose-based curable resin, a solvent, and a leveling agent; a polymer polymerized from a thiophene-based monomer ; and a dispersant; characterized by comprising A conductive polymer composition for infrared shielding and heat blocking , characterized in that the polymer polymerized from the above-mentioned thiophene monomer comprises a structure represented by the following [Chemical Formula 1] or [Chemical Formula 2]. [Chemical Formula 1] [Chemical Formula 2] (However, in the above [Chemical Formula 1] to [Chemical Formula 2], n is a natural number selected from the range of 10 to 50,000.
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5. In Article 1, The above conductive polymer composition for infrared shielding and heat blocking is, A conductive polymer composition for infrared shielding and heat blocking, characterized by comprising 0.2 to 8.0 parts by weight of a polymer polymerized from the thiophene-based monomer per 100 parts by weight of the resin composition; and 0.1 to 2.0 parts by weight of the dispersant.
6. Infrared shielding and heat-blocking coating film using the conductive polymer composition for infrared shielding and heat-blocking of claim 1
7. In Paragraph 6, The above-mentioned infrared shielding and heat-blocking coating film is, Infrared shielding and heat blocking coating film characterized by UV curing or heat curing
8. In Article 7, The above UV curing is, A coating film for infrared shielding and heat blocking characterized by drying at 75 to 90°C for 1 to 5 minutes, and then irradiating with a UV curing machine at a light intensity in the range of 500 to 1,200 mJ/cm².
9. In Article 7, The above heat curing is, Infrared shielding and heat blocking coating film characterized by curing at 80 to 95°C for 5 to 20 minutes
10. In Paragraph 6, The above-mentioned infrared shielding and heat-blocking coating film is, A coating film for infrared shielding and heat blocking characterized by a thickness of 0.1 to 20 μm
11. In Paragraph 6, The above-mentioned infrared shielding and heat-blocking coating film is, A coating film for infrared shielding and heat blocking characterized by having an infrared shielding rate (IRR) of 70% to 97% in a wavelength range of 300 to 25,000 nm.

Description

Conductive polymer composition for infrared shielding and heat shielding and coating films using the same The present invention relates to a conductive polymer composition for infrared shielding and heat blocking and a coating film using the same. More specifically, the invention relates to a conductive polymer composition for infrared shielding and heat blocking and a coating film using the same that has excellent infrared shielding and heat blocking functions and can simultaneously secure high transparency and long-term stability. Recently, there has been a significant increase in interest in coating films with infrared (IR) blocking and thermal insulation functions in fields such as luxury vehicles and construction. For example, double-laminated glass equipped with infrared reflection and absorption capabilities has been applied to specific vehicle models to suppress heat ingress into the vehicle's interior and improve indoor thermal insulation performance. Conventionally, technologies have been developed to manufacture infrared shielding films with structures including metal oxide films, metal nanoparticle coatings, or multilayer metal thin films in order to impart infrared shielding capabilities. For example, a composite laminated structure has been proposed in which an infrared reflective layer composed of metal or metal oxide is formed on a polyacrylate-based hard coating layer. While structures utilizing such multilayer metal thin films offer the advantage of excellent heat blocking effects due to superior infrared reflection performance, the overall visible light transmittance of the film inevitably decreases because the metal layer inherently possesses light-blocking properties. This leads to problems such as reduced indoor lighting or reduced external visibility. Furthermore, the metal layer is susceptible to scratches and corrosion, which can cause durability issues in long-term usage environments. Consequently, there is a concern that optical properties may change or the film's performance may deteriorate. Another prior art proposes a technology to suppress heat rise inside a vehicle using a laminated glass structure with an infrared reflective film, but in such a structure, reflection stains can only be prevented if the difference in the film's refractive index (Rh - Rf, Rh - RL) is precisely controlled within a specific range. That is, if the difference in refractive index exceeds the allowable range, there is a problem that issues with color uniformity or opacity in appearance may occur. As such, infrared shielding structures based on conventional technology have limitations in applications requiring both high transparency and long-term stability. In particular, due to the structural characteristics that necessitate precise control of refractive index differences, they are highly sensitive to manufacturing processes, making it difficult to achieve mass production or ensure consistent quality. FIG. 1 is a process diagram showing a method for manufacturing a coating film for infrared shielding and heat blocking according to a preferred embodiment of the present invention. FIG. 2 illustrates a coating film for infrared shielding and heat blocking according to a preferred embodiment of the present invention. FIG. 3 illustrates a surface hardness strengthening film according to a preferred embodiment of the present invention. FIG. 4 illustrates a surface hardness-enhancing film according to a preferred embodiment of the present invention. Figure 5 shows the FT-IR experimental results of a conductive thiophene-based polymer containing sulfonic acid groups according to a preferred embodiment of the present invention. Figure 6 shows the UV-Vis-NIR spectrophotometer measurement results of a coating film according to a preferred embodiment of the present invention. The terms used in this specification have been selected based on currently widely used general terms, taking into account their functions in the present invention; however, these terms may vary depending on the intent of those skilled in the art, case law, the emergence of new technologies, etc. Additionally, in specific cases, terms have been arbitrarily selected by the applicant, and in such cases, their meanings will be described in detail in the relevant description of the invention. Therefore, terms used in this invention should be defined not merely by their names, but based on their meanings and the overall content of the invention. Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an ideal or overly formal sense unless explicitly defined in this application. Numerical ranges inc