Ablative heat-insulating coating and preparation method thereof

Abstract

The invention provides an ablative heat-insulating coating and a preparation method thereof. The ablative heat-insulating coating comprises a base material, a filler and an auxiliary material based on weight percent. The base material is room temperature vulcanization block methyl silicone rubber and accounts for 68 to 73 weight percent; the filler comprises 13 to 14 weight percent of quartz powder and 8 to 15 weight percent of cork powder; and the auxiliary material is a plasticizer and an antioxidant and accounts for 4 to 5 weight percent. The auxiliary material is a mixture of the following components in percentage by weight: 0.3 to 0.5 percent of triphenylmethane, 0.3 to 0.5 percent of benzophenone, 0.4 to 0.6 percent of di-tert-butyl- p-cresol, 1.5 to 1.7 percent of dibutyl phthalate, and 1.5 to 1.7 percent of di-n-octyl ortho-phthalate. The quartz powder has the granularity of 200 meshes and has the purity of 99.8 percent; and the cork powder has the granularity of more than 80 meshes and has the moisture content of less than 10 percent. The ablative heat-insulating coating is coated on the surface of a device after being diluted by gasoline, and a layer of aluminum powder is sprayed on the outer surface of the coating. The ablative heat-insulating coating has the characteristics of low cost, convenient construction, good heat-insulating performance, strong adhesive force, and long service life.

Description

technical field The invention relates to an ablation heat-insulating paint and a preparation method thereof, belonging to the technical field of paint products, in particular to a heat-insulating paint. Background technique When the aircraft re-enters, due to severe aerodynamic heating, the temperature of the aircraft shell rises rapidly, and the radiant heat increases, which will increase the temperature in the aircraft cabin, even exceeding the working environment requirements of the instruments and equipment in the cabin. Therefore, there is a need for a measure that can effectively reduce the radiant heat of the shell, and one of the most effective means is to add a heat insulation layer on the inner surface of the shell. At present, there are many types of thermal insulation coatings for aircraft, but there are more or less disadvantages, such as high manufacturability requirements, low product strength, high brittleness, limited life, unsatisfactory thermal insulation...

AI Technical Summary

Problems solved by technology

The object of the present invention is to provide a kind of ablation thermal insulation coating and preparation method thereof, this thermal i

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