China Rubber Network recently learned from the Baotou Rare Earth Research Institute that the rare earth separation and application team of the institute, in conjunction with the China Aviation Development Institute of Aeronautics and Astronautics, has successfully developed a silicon Light rare earth heat resistant agent products for rubber and fluorosilicone rubber.
This product has been tested and verified by China Aviation Development Beijing Institute of Aeronautical Materials, which can effectively improve the use temperature of silicone rubber and fluorosilicone rubber materials and improve its heat resistance level. The heat resistance of silicone rubber products prepared with self-developed rare earth heat-resistant agent has reached the level of similar imported products, which can realize the localized replacement of such high-value-added heat-resistant agent products.
Silicone rubber has a wide range of applications in electrical, electronic, office equipment, automobile, construction, medical, food and artificial organs due to its excellent weather resistance, high and low temperature resistance, electrical insulation, radiation resistance, and biological inertness.With the development of modern science and technology, the requirements for the heat resistance of silicone rubber in various fields are getting higher and higher. For example, the cabin temperature of aero-engines is often above 300 ℃, which puts forward higher oil resistance and high temperature resistance requirements for rubber parts.
According to China Rubber Network, silicone rubber materials mainly undergo main chain degradation and side chain methyl oxidation reactions in aerobic and high temperature environments, resulting in the decline of mechanical properties of silicone rubber. . Adding rare earth heat-resistant agent to silicone rubber can effectively improve the heat-resistant performance of silicone rubber. The mechanism is that rare earth elements with oxidation-reduction effect can prevent free radical reaction in silicone rubber due to oxidation within a certain temperature range, and rare earth metal compounds can absorb some trace acids or alkalis in silicone rubber that can catalyze degradation reactions. It can be used for thermal stabilization of silicone rubber.
Rare earth resources are valuable strategic resources, but the application fields of light rare earth lanthanum and cerium resources are limited, the resource utilization rate is low, the product backlog is large, and the market price has been depressed for a long time. The core reasons are Insufficient development of applications. The successful research and development of light rare earth heat-resistant agent products for special rubber materials will help promote the high-value utilization of lanthanum and cerium, and also shows that the combination of rare earth and polymer materials has broad application prospects.