COMPOSITION FOR HEAT-PROTECTIVE COVER Russian patent published in 2007 - IPC C04B41/48 C09D5/18 C09D109/04 C09D113/02 

FIELD: special compositions.

SUBSTANCE: invention relates to compositions used in preparing heat-protective covers based on silicon-containing ceramic hollow microspheres and able to withstand strong temperature drops. Composition for preparing heat-protective cover comprising hollow ceramic microspheres as a filling agent, a polymeric binding agent, technological additive and water involves hollow ceramic microspheres of specific mass 450-750 kg/m³, hardness value by Mohs scale 5.0-6.0 as a filling agent and in the following distribution of particles by sizes, wt.-%: basis diameter 250-350 mcm, 30-62; diameter 5-10 mcm, 15.0-20.0; diameter 10-30 mcm, 5.0-30.0; diameter 30-50 mcm, 5.0-30.0; diameter 60-100 mcm, 8.0-10.0; diameter 100-250 mcm, 5.0-10.0; as a polymeric binding agent the composition comprises latex chosen from group involving: modified acryl acetate latex, 33-38% latex of copolymer of butadiene, acrylonitrile and methacrylic acid, copolymer of styrene and n-butyl acrylate in the ratio 1:1 by mass; as a technological additive the composition comprises a froth breaker chosen from group comprising: silicon froth breakers, tributyl phosphate, polyester derivatives of fatty acids in the following ratio of components, wt.-%: abovementioned microspheres, 18-32; abovementioned froth breaker, 0.01-1.0; abovementioned binding agent, 8.0-12.0, and water - up to 100. Invention provides expanding assortment of compositions for preparing heat-protective covers, enhancing heat-protecting, heat-physical indices of cover with high uniformity and cohesion strength of cover with a basis, expanding region of working temperature from -60°C to +260°C. Invention can be used in filed of building, machine engineering, aviation, railway transport wherein surfaces require conferring heat-protective properties in exploitation of covers under rigid temperature conditions.

EFFECT: improved and valuable technical properties of composition.

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