SioResin Application Plan: High-Temperature Graphene Coating
As a cutting-edge nanomaterial, graphene has garnered significant global attention from scientists. Various countries are competing to lead graphene research. Scientists even predict that graphene will trigger a revolutionary wave of new technologies and industries worldwide. The popularity of graphene is due to its high specific surface area, excellent electrical conductivity, outstanding chemical stability, exceptional mechanical properties, and superior thermal conductivity. Graphene has vast application potential, ranging from supercomputers to supercapacitors, composite materials, and coatings. The quickest application might be in the coatings industry.
Currently, most graphene coatings use standard organic resins as adhesives, with long-term heat resistance below 180°C, limiting their use in high-temperature environments (200-600°C). Enhancing the operating temperature of graphene coatings will broaden their application scope, such as in industrial pipelines, reaction vessel heating, and domestic heating, potentially replacing electric coils, heating rods, and gas heating. By achieving unidirectional heating, graphene can save significant energy, as it heats instantly, with a thermal-to-electric conversion efficiency of 99%, consuming only one-third the electricity of coil heating. Under national policies promoting “energy conservation and emission reduction” and “carbon neutrality,” this technology will gain widespread attention and development.
What is the Water-based high-temperature graphene silicone resin coating?
Water-based high-temperature graphene silicone resin coating prepared from our SiO-715 silicone resin emulsion. It achieves water-based high-temperature coating and combines with graphene to extend its temperature limits. This creates a synergy of high temperature resistance, water-based formulation, and high thermal conductivity, meeting market demands for water-based ultra-high temperature graphene coatings. It uses water-based high-temperature silicone resin as the film-forming material, withstanding temperatures of 200-800°C. Applied via spraying on various metal substrates and baked, the resulting coating exhibits high temperature resistance, hardness, adhesion, weather resistance, and thermal conductivity.
Product Characteristics
- Excellent water dilutability, low odor, free of toluene and xylene, complying with environmental regulations.
- Superb film-forming properties, good wetting and leveling, with quick surface drying at room temperature.
- Good adhesion to metal substrates such as cast iron, pig iron, stainless steel, copper alloys, aluminum alloys, and tinplate.
- Excellent hardness, achieving up to 8-9H depending on the substrate and curing temperature.
- Fully cured film offers good thermal stability, outstanding weather resistance, and salt spray resistance.
- Fully cured film has good toughness, abrasion resistance, impact resistance, yellowing resistance, and chemical resistance.
- High thermal conductivity, rapidly dissipating heat, achieving instant heating with over 99% thermal-to-electric conversion efficiency.
Technical Specifications
| Item | Test Method | Specification |
| Coating Appearance | Beaker sample, visual | Black liquid (stir before use if sedimented) |
| Baked Film Appearance | Visual, color card | Uniform color, no exposure, no cracks, wrinkles, bubbles, or speckles |
| Solid Content (w/w) | 2h@150°C | 40-45% |
| Viscosity | (Tu-4 cup)@25°C, s | 30-100 |
| Drying Time | Surface dry: (23±2°C) | ≤1h 30 minutes |
| Curing: Bake @220°C | ||
| Adhesion (Sandblasted) | Cross-cut test | Grade 0 |
| Heat Resistance | 6h@600°C | Intact coating, no cracking or peeling |
| Thermal Shock Resistance | Heated to 550°C, then water-cooled; ≥5 cycles | No peeling, cracking, bubbling; minor gloss and color changes allowed |
Applications
- Rapid heat dissipation in high-temperature environments, such as kettles, heating plates, heating rods, and industrial heating.
- Water-based thermal dissipation coatings for electronic and electrical components and electromechanical products.
- Rapid heat dissipation coatings for large electromechanical devices, engines, and industrial equipment.
High-Temperature Graphene Coating Suggested Formulation
For water-based high-temperature graphene silicone resin coating, the following recommended formulation can be used as a starting point to prepare a single-component bakeable graphene coating:
Black Paste Formulation:
| Component | Amount (parts by weight) | Function | Supplier |
| Deionized Water | 531.6 | ||
| Dispersant BYK-190 | 24 | BYK | |
| Anti-settling Agent BYK-420 (10%) | 18 | BYK | |
| Anti-settling Agent Bentone LT (2%) | 24 | Haimings | |
| Defoamer Foamex 810 | 2.4 | Tego | |
| Low-melting Glass Powder (350°C) | 200 | Enhances high-temperature adhesion | |
| Copper Chromium Black | 200 | High-temperature pigment | |
| Mica Powder | 100 | Enhances low-temperature adhesion | |
| High-Purity Zinc Phosphate | 100 | Improves boiling water and salt spray resistance | |
| Total | 1200 |
Procedure:
- Add defoamer, anti-settling agents, and dispersant to deionized water; stir at 1000 rpm for 5 minutes.
- Add mica powder, low-melting glass powder, copper chromium black, and high-purity zinc phosphate; stir at 2000-3000 rpm for 45 minutes.
High-Temperature Graphene Coating Formulation:
| Component | Amount (parts by weight) |
| Silicone Resin Emulsion SiO-715 | 100 |
| Black Paste | 20-67 |
| Graphene Paste (10%) | 5 |
| Anti-settling Agent (Bentone LT, 2%) | 4 |
| Flash Rust Inhibitor | 1 |
| Epoxy Phosphate (Adhesion Promoter) | 1 |
| Wetting Agent (Tego 4100) | 0.3 |
| Defoamer (Tego Foamex 810) | 0.1 |
| Thickener (Dow DR-50) | 1-2 |
Procedure:
- Disperse all components evenly at 1000-1500 rpm for 20-30 minutes and adjust to the appropriate viscosity; filter with a 200-mesh filter bag during packaging.
Notes:
- Adjust the solid content with deionized water as needed.
- Adjust the pigment-to-binder ratio according to requirements: high ratios result in low gloss and better heat resistance; low ratios yield high gloss and better salt spray resistance and wear resistance. Use high ratio coatings as primers and low ratio coatings as topcoats.
- Control single spray dry film thickness to 35-50 microns to prevent cracking; ensure the previous coat is fully cured before recoating.
- During initial use, slowly heat to high temperatures to complete secondary sintering; avoid placing unsintered workpieces directly in high-temperature environments to prevent film cracking.
High-Temperature Graphene Coating Usage Instructions
Application Methods:
- Spraying or screen printing
Process:
- Stir the coating thoroughly before use to prevent sedimentation. Add 5-10% deionized water to adjust spraying viscosity if necessary; perform small-scale tests first.
- Surface treatment of the substrate: degrease and derust. For large-scale applications, enhance roughness through sandblasting, brushing, or grinding to improve adhesion.
- Application: Spray or screen print, dry at room temperature, then bake or low-temperature bake below 80°C to accelerate drying. Avoid high-temperature baking of wet films to prevent bubbling.
- Baking: Fully cure at 200-280°C for 10-60 minutes, preferably at 220°C for 30 minutes or 280°C for 10 minutes.
Cautions:
- Stir the coating thoroughly before use to ensure uniformity due to varying densities of high-temperature materials. Reseal the container immediately after use to prevent thickening and crusting. Clean spray guns and brushes with water promptly to avoid residual coating curing at room temperature, which could affect future use.
About SioResin
SiOResin boasts strong capabilities and can supply large quantities of high-quality pure waterborne silicone resin. If needed, please feel free to contact us. We can provide free samples.
Best luck!