FIELD: chemistry.
SUBSTANCE: invention relates to the chemical industry and can be used for obtaining heat-insulating coatings with anticorrosion and sound-absorbing properties on different surfaces. A coating is made from a polymer composition, including a polymer water-suspension composition, containing a binding in the form of a water polymer composition, if necessary auxiliary target additives, and a mixture filler in the form of a mixture of particles and granules of aerogel, ambigel or xerogel based on amorphous silicon dioxide and/or alumina with the bimodal distribution of the particle size in the range from 1 to 10000 mcm and the bulk density in the range from 600 to 60 kg/m3, or their mixture with hollow microspheres, differing from each other in size in the range from 3 to 500 mcm and the bulk density in the range from 700 to 50 kg/m3. The microspheres are selected from the group, including hollow glass microspheres, hollow ceramic microspheres, hollow technogenic (ash) microspheres, polymer microspheres. The ratio in the mixture of microspheres and particles of aerogel in the mixture filler constitutes from 1:99 vol.% to 99:1 vol.%. The ratio between the binding polymer composition and the said mixture filler, vol.%: the binding polymer composition 5-95, the said mixture filler 5-95. The method of obtaining the heat-insulating double-layer coating is also described. First, a layer of the composition, containing as the filler only aerogel with the bimodal distribution of particles in the range from 1 to 10000 mcm, is applied, after which, the coating, containing as the filler only the mixture of hollow microspheres, is applied.
EFFECT: provision and improvement of simultaneous heat-insulating, anticorrosion and sound-absorbing properties of the coatings, in particular of pipeline surfaces, and simplification of the coating obtaining technology.
9 cl, 4 tbl, 11 ex
