XIR® Automotive Films – Solar Control Technology

The recommendation discloses the automotive glass coating product named XIR® Automotive Films. This product features a transparent coated film that is encapsulated between layers of Saflex® PVB (polyvinyl butyral) in laminated automotive glass, forming a protective barrier against the harmful effects of the sun. The spectrally-selective metallic coating reflects heat-causing infrared (IR) rays without impairing visible light transmission. XIR® laminated glass reduces solar heat gain by an average of 35% more effectively than tinted glass. The XIR® film offers several benefits, including: Reducing solar heat gain, Improving cabin comfort, Increasing fuel efficiency and Reducing CO₂ emissions.

The solution to the problem is provided by Eastman

Technology Provider: Eastman

Type of Coating:

• Spectrally-selective metallic coating
• XIR automotive film is a transparent coated film that is encapsulated between layers of Saflex® PVB (polyvinyl butyral)

Coating Material/Composition:

• Metallic Material
• PVB (polyvinyl butyral)

Form of coating Composition: Film

Application areas of coating: Automotive glass Film

Benefits of glass coating:

• Reduces solar heat gain
• Protective barrier against the harmful effects of the sun.
• Reflects heat-causing infrared (IR) rays.
• Improves Cabin Comfort
• Increases Fuel Efficiency
• Reduces CO2 Emissions

Safety/Regulatory Information

Laminated glass incorporating XIR automotive film is CO2 credit eligible, allowing automotive OEMs to receive US EPA off-cycle credits

Summary of Automotive Glass Coating

• XIR automotive film is a transparent coated film that is encapsulated between layers of Saflex® PVB (polyvinyl butyral) in laminated automotive glass to form a protective barrier against the harmful effects of the sun.
• The spectrally-selective metallic coating reflects heat-causing infrared (IR) rays without impairing visible light transmission.
• XIR laminated glass reduces solar heat gain an average of 35% more effectively than tinted glass.
• Applications: Windscreen, Side Window, Sunroof, Back Glass, Quarter Glass.

Summary

Eastman Chemical Company's innovations in automotive glass coating compositions have significantly impacted the way vehicles manage heat and energy, contributing to both comfort and sustainability in the automotive industry.

Company Information

Founded in 1920, Eastman is a global specialty materials company that produces a broad range of products found in items people use every day. With the purpose of enhancing the quality of life in a material way, Eastman works with customers to deliver innovative products and solutions while maintaining a commitment to safety and sustainability. The company's innovation-driven growth model takes advantage of world-class technology platforms, deep customer engagement, and differentiated application development to grow its leading positions in attractive end markets such as transportation, building and construction, and consumables.

Eastman Chemical Company, a global specialty materials company, is known for its diverse portfolio of advanced materials and additives. One of its noteworthy contributions, particularly relevant to the automotive industry, is its development of glass coating compositions that help reduce heat inside vehicles.

Eastman's automotive glass coatings typically consist of a combination of materials that include: Nanoparticles such as metal oxides (e.g., titanium dioxide or cerium oxide), which provide the UV and IR blocking properties. Polymer matrices that bind these nanoparticles and help adhere the coating to the glass surface. Specialized additives to improve optical clarity and enhance scratch resistance, durability, and longevity.

By balancing these materials in precise proportions, Eastman's glass coatings manage to maintain transparency and visibility while providing effective thermal protection. The company's focus on innovative materials research ensures that these products are optimized for performance under various environmental conditions.

CN118496697A - Preparation method and application method of attractive multifunctional coating material for glass window (TRL-3)

The recommendation discloses the preparation and application methods for a coating material for glass windows, preferably for automotive glass windows. The method describes the preparation of a transparent nano-silica sol by mixing a silane precursor, nano-silica sol, solvent, and deionized water. Then, chrome copper black, grinding-free black, or other color fillers are added and ground to ensure even dispersion. The resulting paint is sieved to obtain a multifunctional water-based coating. Additionally, the method discloses the preparation of a hydrophobic coating by mixing a silane coupling agent (SCA-F13C8M), nano-silica sol, and solvent. The prepared coating material can provide different degrees of blackness according to customers' requirements for car window privacy. A layer of hydrophobic material can improve the window's hydrophobicity, thus solving the issue of obstructed vision on rainy days and significantly enhancing driving safety. When the antimony tin oxide content is 25% by mass, the coated glass can block 90% of infrared light waves (2000-2500 nm), providing heat insulation. The vehicle window coating prepared by the present invention also exhibits good durability. Most importantly, the coating material is simple to prepare, cheap, and environmentally friendly.

The solution to the problem is provided by Shandong Keyuan New Material Technology Co., Ltd & Others

CN118496697A Publication Year: 2024

Technology Provider: Shandong Keyuan New Material Technology Co., Ltd.; Shandong Kangyijia New Material Technology Co., Ltd.

Type of Coating: Nano Coating the preparation method of the transparent hydrophobic coating material in step (4) comprises: solvent, SCA-F13C8M and nano silica sol (30wt. ％) is 5-10:0.2-1.0:1

Coating Material/Composition:

• Mix Silane precursor, nano-silica sol, a solvent and deionized water.
• Adding chrome copper black and grinding-free black or other color fillers.
• Solvent, SCA-F13C8M and nano silica sol (30wt. ％) is -10:0.2-1.0:1.

Form of coating Composition: Sol-gel

Application areas of coating: Automotive glass coating

Benefits of glass coating:

• The coating has embodiment has good anti-ultraviolet and infrared (heat insulation) effects.
• Different degrees of blackness.
• Improve the hydrophobicity, Improve driving safety
• Good Durability

Safety/Regulatory Information: No information

Summary of Automotive Glass Coating

• The invention relates to the technical field of coatings, and in particular to a preparation method and an application method of an aesthetically pleasing multifunctional coating material for glass windows.
• Most importantly, the coating material is simple to prepare, cheap, and environmentally friendly.
• Preferably, the coating is applied to automobile glass windows, architectural glass windows, and other glass requiring aesthetics and functionality.
• The coating sample prepared in the embodiment has good anti-ultraviolet and infrared (heat insulation) effects.
• The results showed that the more the amount of grinding-free black, the darker the sample was and the lower the light transmittance was, but the writing under all samples was not deformed or distorted. This means that we can provide coating products with different degrees of blackness according to different customers' requirements for car window privacy.
• coating the window surface with a layer of hydrophobic material can improve the hydrophobicity of the window, thereby solving the problem of obstructed vision on rainy days and greatly improving driving safety.
• The antimony tin oxide content is 10% by mass, the coated glass can isolate 70% of infrared light waves (2000-2500nm); when the antimony tin oxide content is 25% by mass, the coated glass can isolate 90% of infrared light waves (2000-2500nm) (heat insulation).
• The vehicle window coating prepared in the present invention has good durability.

Method for preparing glass coating composition

The present invention provides a method for preparing an aesthetically pleasing multifunctional coating material for a glass window, comprising the following steps:

Step (1): mixing a silane precursor, nano-silica sol, a solvent and deionized water to obtain a transparent nano-silica sol;

Step (2): adding chrome copper black and grinding-free black or other color fillers to the transparent nano-silica sol of step (1), dispersing and grinding; Step (3): sieving the paint ground in step (2) to obtain a multifunctional water-based paint; Step (4): Mix the silane coupling agent SCA-F13C8M, nano silica sol and solvent to obtain a transparent hydrophobic coating material.

Preferably, the silane precursor in step (1) is selected from: methyltriethoxysilane, or methyltrimethoxysilane, or ethyl orthosilicate, or a mixture of two of them.

In step (2), the content of chrome copper black accounts for 0.5-2.0% by mass of the silica sol, and the grinding-free black accounts for 0.1-0.5% by mass of the silica sol.

Their proportion and total amount are adjusted according to the required blackness of the glass window; the main component of chrome copper black is copper chromite (CuCr2O4), and the main component of grinding-free black is carbon black (CB); other color fillers, including: blue antimony tin oxide nanoparticles, also have transparent heat insulation functions.

Preferably, in the step (2), chrome copper black and grinding-free black are first added to the silica sol, and then ultrasonically dispersed using a cell crusher with a power of 400-800 W for 5-20 min, and finally ball milled in a ball mill for 24-48 hours at a speed of 280-300 r/min.

Preferably, in step (3), the mesh size of the sieve is 400-800 meshes.

Preferably, the preparation method of the transparent hydrophobic coating material in step (4) comprises: solvent, SCA-F13C8M and nano silica sol (30wt. ％) is 5-10:0.2-1.0:1.

A method for applying an aesthetically pleasing multifunctional coating material for a glass window, further comprising:

Step (5): directly applying the coating of step (4) to the glass surface to prepare a surface hydrophobic and easy-to-clean coating;

Step (6): applying the coating of step (4) to the upper surface of the black or colored coating of step (3) to prepare a transparent hydrophobic coating having a surface hydrophobic self-cleaning function and not affecting the color of the base layer;

Step (7): Apply the coating of step (4) to the back of the glass with the anti-ultraviolet and heat-insulating coating of step (3) to achieve a multifunctional glass product with a hydrophobic outer surface and anti-ultraviolet and heat-insulating inner surface.

Test Methods: Summary of the Example Preparation Method:

Example 1: Preparation Method:

• Step 1: A transparent silica sol was prepared by mixing 56g of 30wt% silica sol, 8g of deionized water, 60g of n-propanol, and methyltriethoxysilane, stirring for 1 hour.
• Step 2: 100g of silica sol was combined with 1g of chrome copper black and 0.1g of grinding-free black, ultrasonicated for 10 minutes, and ball milled for 24 hours at 300r/min.
• Step 3: The mixture was sieved through a 600-mesh sieve to remove large particles and obtain a multifunctional coating.
• Step 4: The coating was sprayed onto automobile glass and cured under a 1000W infrared lamp for 3 hours.

Embodiments and Variations:

• Example 2: Increased the amount of grinding-free black to 0.2g.
• Example 3: Increased the amount of grinding-free black to 0.4g.
• Example 4: Added a hydrophobic coating to create a multifunctional UV-protective, heat-insulating, and hydrophobic product.
• Example 5: Applied the hydrophobic coating on the back of the black-coated glass from previous examples to create a double-sided multifunctional glass product.
• Example 6: Replaced black pigment with blue nano-antimony tin oxide for heat-insulation functionality, with higher content providing more infrared isolation.
• Example 7: Used blue or pink color powder for aesthetic variations in glass coatings.

Test Result & conclusion

Figure 2 is a 1wt. prepared in Example 1. %Copper chrome black + 0.1wt. UV-Vis-NIR graph of % no-grind black product.

The results show that the coating sample prepared in the embodiment has good anti-ultraviolet and infrared (heat insulation) effects compared with transparent window glass, its ultraviolet light transmittance is 0, and the infrared light wave transmittance is reduced by 20-30%

Please Note that the reduction of infrared light wave transmittance is also reduces the heat

Figure 7 is a test demonstration of the difference in indoor temperature between blue insulation windows and ordinary glass windows.

The thermometer installed indoors shows that the indoor temperature of the insulation windows is 5 degrees lower than that of the ordinary glass windows.

Figure 3 is a 1wt. prepared in Example 4. %Copper chrome black + 0.1wt. %Contact angle graph of the No-grind Black + Hydrophobic Coating product.

The results show that coating the window surface with a layer of hydrophobic material can improve the hydrophobicity of the window, thereby solving the problem of obstructed vision on rainy days and greatly improving driving safety.

FIG. 1 is a diagram of coating products of different blackness prepared in Examples 1-3.

The results showed that the more the amount of grinding-free black, the darker the sample was and the lower the light transmittance was, but the writing under all samples was not deformed or distorted.

Related Resources:

Tech Coatings to Cut Heat in Automotive Glass Overview and Types

Tech Coating to Cut Heat in Automotive Glass (Benefits & Key Technology Area)

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