Application of Heat-resistant Silicone in Automotive Industry and Aerospace Field

Heat-resistant silicone material is a special material widely used in industries such as industry, electronics, and daily products, and is favored by market customers. It is refined with high-temperature-resistant agents to make the product heat-resistant up to 300℃ and short-term 350℃, with good tear resistance and rebound elasticity. In a high-temperature environment of 300 degrees, the hardness can still be maintained between Shore A 44-85 after 7 hours of experimentation, with a tensile strength of 3.6-5.3 MPa and an elongation of 30%-255%.

Application of Heatproof Silicone Material in Automotive Industry

Heat-resistant silicone material is an essential material in automobile manufacturing. It can not only optimize the production process of automobiles but also improve the performance and safety of automobiles. It is currently widely used in various automotive components, such as safety airbag coatings, power transmission seals, gaskets, hoses, windshield linings, automobile engine seals, ignition cables and coil sleeves, turbocharger cooling pipes, sealing and protection of automotive components, high-voltage cable and wiring harness sealing, etc.

Compared with traditional fuel vehicles, hybrid and electric vehicles have added many high-voltage components such as power batteries, high-voltage distribution boxes, drive motors, and motor controllers, which have put forward new requirements for automotive cables. Since these cables are arranged in the front engine and chassis areas where the temperature is high and the space is tight, the cables need to be flexible, have a small bending radius, and have good high and low-temperature resistance. Secondly, the road conditions are complicated, and the cable must have good wear resistance and high mechanical strength. In addition, the speed of the vehicle is high or low, especially under harsh conditions such as full load climbing, an instant high current requires the cable to have short-term overload capacity.

Therefore, new energy vehicle cables must have: good electrical insulation performance; thermal stability and weather resistance; excellent corrosion resistance, oil repellency, and flame retardancy; comprehensive mechanical properties, with high flexibility and high tear resistance, and so on.

Application of Heatproof Silicone Material in Aerospace

Silicone rubber material is an excellent insulation rubber material with ozone resistance and high-temperature resistance. However, the biggest disadvantage of this material is flammability, and a good performance flame retardant is needed to overcome this defect. We analyzed the preparation and performance of flame-retardant silicone rubber in the aerospace field, and discussed the influence of several commonly used flame retardants on the flame resistance of silicone rubber to improve its flame resistance performance and expand its application range.

Due to the special environment and technical requirements of aerospace vehicles, high-temperature vulcanized silicone rubber is widely used in aerospace products.

The research results show that when the amount of vulcanizing agent in flame-retardant silicone rubber increases, the hardness of the silicone rubber is slightly improved, but the elongation at break is reduced, and there is no obvious change in the oxygen index and tensile strength of the silicone rubber. After secondary vulcanization, compared with BIPB, DCBP, and DCP, the use of BP vulcanizing agent causes a decrease in the tensile elongation and tensile strength of the silicone rubber, but its hardness is slightly improved, while other vulcanizing agents improve the tensile strength of the silicone rubber. In addition, all four vulcanizing agents have to varying degrees increased the flame retardancy of silicone rubber, which proves that different types of vulcanizing agents have a significant impact on the heat resistance of silicone rubber.