Silicone rubber material is an excellent insulating rubber material, which has the characteristics of ozone resistance and high temperature resistance. However, the biggest disadvantage of this material is that it has inflammability, and a flame retardant with good performance is needed to overcome this shortcoming. We analyzed the preparation and performance of flame retardant silicone rubber in the aviation field, and discussed the flame retardant effect of several common flame retardants on silicone rubber, in order to improve the flame retardant performance of this material and expand its application range. On this basis, further explore the current research and prospect of aviation silicone rubber materials.


Because of the special use environment and technical requirements of space vehicles, high temperature vulcanized silicone rubber is widely used in aerospace products. Aerospace materials and process technology in the engineering department for many years of development work accumulated a lot of high temperature vulcanized silicone rubber formula and process, through the application of demand analysis, the high temperature vulcanized silicone rubber formula and process data organized into application cases, material performance indicators, formula rules summary, process knowledge and test methods and other content of the application.


In order to study the effects of different kinds of vulcanizing agents on the properties of high temperature and flame retardant silicone rubber, we applied four kinds of vulcanizing agents, BIPB, DCBP, BP and DCP, in the rubber production, and conducted a comparative study on the properties of flame retardant silicone rubber, such as elongation at break, hardness, tensile strength and flame retardant. The research results showed that when the amount of vulcanizing agent in flame retardant silicone rubber increased, The hardness of silicone rubber is increased, but the elongation at break is decreased, while the oxygen index and tensile strength of silicone rubber are not significantly changed.


After secondary vulcanization, compared with BIPB, DCBP and DCP, the use of BP vulcanizing agent resulted in a decrease in the elongation at break and tensile strength of silicone rubber, but its hardness was increased, and other vulcanizing agents all increased the tensile strength of silicone rubber. In addition, these four vulcanizing agents all improve the flame retardancy of silicone rubber to a certain extent, and then prove that different kinds of vulcanizing agents have a greater impact on the heat resistance of silicone rubber.