According to identity of flying task in some solid rocket motor as well as the mechanism study of heat鄄
resistant and heat insulation of coating,a kind of heat鄄resistant and heat insulation coating was prepared on the basis of
epoxy resin grafted by silicone, mixed by temperature鄄resistant mixture filling and additive. The optimum parts of po鄄
ly鄄phosphate ammonium、aluminium hydroxide and boric acid are 4,6,3 respectively, by using L9(33) orthogonal ex鄄
periment. The results of the coating tests of the final optimum prescription:its line ablation rate is 0. 116 mm/ s,the
heat conductivity is 0. 28 W/ (m·K)、the density is 1. 28 g/ cm3,the adhesion strength is 11. 84 MPa,all show that
the coating is of good combination of performances,especially good heat鄄resistant and heat insulation characteristics,
which can satisfy the need of requirement of outer heat鄄resistant in solid rocket motor