For the laser radars, vehicle-mounted cameras, and millimeter-wave radars of L2-L4 level autonomous vehicles, a silicone oil nano-dewetting coating must be installed. Relying on the low surface energy characteristic of organic silicon, it can achieve long-term prevention of rainwater and oil stains, ensuring stable accuracy of autonomous driving recognition.
This coating is made from high-purity phenyl silicone oil. It is ultra-thin and transparent without fog. Raindrops immediately form water droplets and slide off the lens surface, leaving no water film to block the lens. Road asphalt oil stains and mosquito secretions are difficult to adhere, significantly reducing the risk of sensor dirtiness and failure during high-speed driving. The silicone oil coating has high temperature resistance, with its dewetting performance not deteriorating within the -40°C to 120°C operating conditions, suitable for extreme environments such as northern winters and southern sun exposure.
The new version of the Ministry of Industry and Information Technology's automotive component standards clearly require that the coatings of high-level autonomous driving optical sensors must pass a 2000-hour combined aging test of ultraviolet rays and salt fog. Ordinary fluorine-based coatings have insufficient durability, while the silicone oil composite coating can consistently meet the standards. The coating insulation does not interfere with the transmission of radar electromagnetic waves and does not affect the reception of vehicle auxiliary driving signals.
In 2026, the sales of new energy intelligent vehicles will explode. The demand for high-end optical silicone oil coatings will increase by 28% year-on-year. Previously, this field relied heavily on imported silicone oil raw materials. The domestic IOTA optical-grade silicone oil has completed vehicle-grade certification and is supplying domestic intelligent car manufacturers in batches, accelerating the process of import substitution.