HEAT-INSULATION FIRE-RESISTANT COATING Russian patent published in 2019 - IPC C09D109/00 

FIELD: heat exchange.

SUBSTANCE: claimed coating relates to heat-insulating fire-resistant coatings and can be used for thermal insulation of hot metal surfaces of industrial equipment and working surfaces of pipelines. Described is a heat-insulating fire-resistant coating for thermal insulation of a metal surface, comprising an acrylic dispersion, hollow microspheres, a flame retardant additive, pigment, an antifoaming agent in which hollow carbon microspheres are used as hollow microspheres, as a fire retardant additive, fine-grained galvanic sludge formed during reagent purification of waste water from galvanic production of composition Zn(OH)₂, Ni(OH)₂, Cu(OH)₂, Fe(OH)₃, Ca(OH)₂, oxides of CaO, SiO₂, dried and subjected to grinding to degree of grinding of not more than 40 mcm, with the following ratio of components, wt h: acrylic dispersion "Akremos 101" 32.0–56.0; hollow carbon microspheres 14.0–38.0; fine-grained galvanic slime formed during reagent purification of waste water from galvanic production of composition Zn(OH)₂, Ni(OH)₂, Cu(OH)₂, Fe(OH)₃, Ca(OH)₂, oxides CaO, SiO₂, dried and subjected to milling to degree of grinding of not more than 40 mcm 5.0–15.0; antifoaming additive BYK-037 0.30; pigment 1.0–5.0.

EFFECT: technical result consists in improved strength and heat-insulating properties of the coating surface.

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