THERMAL-PROTECTIVE COATING COMPOSITION

摘要

FIELD: chemistry.SUBSTANCE: invention relates to heat-resistant coatings intended for protection of inner surfaces of ramjet engines against action of high-enthalpy streams of fuel combustion products with high speeds of flow (200-300 m/s), combustion temperature ~2,000 °C in oxidising medium. Thermal-protective coating composition contains woven filler and binder. Characterised by that woven filler contains a light-weight silica fabric, binder used is butadiene-nitrile carboxylate latex, which additionally contains silicon carbide with particle size 5-7 mcm, at following ratio (wt%): lightweight silica fabric 40-55; butadiene-nitrile carboxylate latex 35-40; silicon carbide 10-20.EFFECT: technical result consists in improvement of performance characteristics of solid-fuel air-jet engines in conditions of high-temperature gas flow due to reduction of weight of heat protection.1 cl, 2 tbl