COMPOSITION FOR PRODUCING A FIRE-RESISTANT ANTI-CORROSIVE HEAT INSULATION COATING AND METHOD FOR THE PRODUCTION THEREOF (VARIANTS) Russian patent published in 2022 - IPC C09D163/00 C09D5/08 C09D5/18 C08K7/22 

FIELD: chemistry.

SUBSTANCE: group of inventions relates to the field of production of coatings exhibiting high strength, fire and weather-resistance characteristics for protecting the pipelines of heat supply systems and air ducts of air heating and ventilation systems. Composition can also be used for finishing fire-resistant industrial structures and hulls of sea and river crafts. Composition for producing a fire-resistant anti-corrosive heat insulation coating contains epoxy resin as a binder; a hardener; hollow glass microspheres; and a target multifunctional additive - plasticisers, pigments, target additives, or a mixture thereof. Hollow glass microspheres of different sizes are used in the composition. The value of bulk density of a sample weight of hollow glass microspheres is selected from the range from 0.20 to 0.43 g/cm³. Hollow glass microspheres used herein are pretreated with a mixture of silicon-containing substances, containing nanoscale silicon dioxide and produced by chemical destruction of siloxane elastomers. The composition contains components in the following ratio: epoxy resin 100 wt. pts., hardener - a stoichiometric amount, mixture of modified hollow glass microspheres 10 to 25 wt. pts., target multifunctional additive 8 to 12 wt. pts. The composition additionally contains a phosphorylated product of the amidolysis of polyurethane foam as a target multifunctional additive or an elasticity-increasing and flammability-reducing part of a mixture of the target multifunctional additive. The components are pre-prepared, and the ingredients are volumetrically mixed in a closed container. Said preparation of hollow glass borosilicate microspheres consists in pre-treating the microspheres with a silicon-containing finishing agent constituting a product of chemical destruction of siloxane elastomers, containing nanoscale silicon dioxide. The product has the following composition: organic part - oligodimethylsiloxane and oligoethoxysiloxane in an amount of 61 to 82 wt.%; inorganic part - mixtures of SiO₂:CaCO₃=50:10 in an amount of 39 to 18 wt.%. Crushed foamed polyurethane is mixed with e-caprolactam in a mass ratio of 1:4. The mixture is stirred while subjected to UHF emission at a power of 350 to 450 W for 10 to 15 min. The resulting resin-like product is phosphorylated with phosphorous acid by the Kabachnik-Fields reaction.

EFFECT: high performance properties of the composition are ensured as a combination of fire-protective properties, anti-corrosive properties, bending strength, and impact strength.

4 cl