TopFlexTM Easy-to-clean coating

Solvent- and Soil-Repellent Coating, UV/IR-Transparent

Hydrophobic coating TopFlexTM GelotTM is chemically resistant against water, oil and grease. This topcoating is easy to clean and repellent to dirt. The coating exhibits an outstanding adherence to the surface or coating beneath and is very resistant to various forms of cleaning processes.

Benefits

Dirt and solvent repelling coating
Soil resistant
Very smooth and easy-care surface
Spectrally neutral in VIS and IR range
Wetting angle approximately 110° to 120°
Temperature stability up to 250°C
Excellent environmental stability
Tested according to automotive requirements
Improved corrosion resistance for metallic coatings
Combinable with Anti-static coatings

Applications

Automotive
Heater windows
Sensorics
Camera glass
Endoscopy
Diagnostics
Research
Anti-Reflection coatings
Metallic coatings & mirrors
Conductive coatings
Anti-static coatings
Beamsplitter
Filter

Cleaning

TopFlexTM can be cleaned with a soft cotton cloth soaked in mild soapy water, ethanol or other non-abrasive substances.

Technical Data

AR coating without TopFlexTM coating
Wetting angle = 36°
Fluids and dirt adhere on the surface

AR coating with TopFlexTM coating
Wetting angle = 120°
Fluids and dirt do not adhere on the surface

Durability tests – amongst others tested according to typical automotive requirements

Environmental tests	TopFlexTM A	TopFlexTM UV
Cheesecloth 500 cycles	✓	✓
Cheesecloth 10‘000 cycles	✓*	✓*
Cheesecloth 50‘000 cycles	✓*
Rubber eraser 50 cycles	✓	✓
UV-A resistance (70W/m² wavelength range 320-390nm and 130W/m² 390-450nm)	200h	500h
Salt fog 24h	✓	✓
IPA/water (1:1) (5min immersion at room temperature, 80°C/24h)	✓	✓
Cola (5min immersion at room temperature, 80°C/24h)	✓	✓
Sweat/alkaline (5min immersion at room temperature, 80°C/24h)	✓	✓
Sunscreen (5min immersion at room temperature, wiping, 70°C/48h)	✓	✓
Acid spray **	✓	not tested
Soapy solution (5min immersion at room temperature, 80℃/24h)	✓	✓
Boiling 1h (in DI water)	✓	not tested
Condensated water (40°C, 144h)	✓	not tested
Storage 90 °C/500h	✓	✓
Climate chamber 49 °C/ 95%r.h./500h	✓	✓
Climate chamber 85 °C/85%r.h./500h	✓	✓
T-shock -40 °C/ +85 °C/ 0.5h/ 500 cycles	✓	✓

* depending on condition

** HCl and other acids mixture, pH approx. 0.9, 2h spray at 35°C, storage at 50°C/ 95%r.h. for 17 days

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