POLYURETHANE PROTECTIVE COMPOSITION Russian patent published in 2017 - IPC C09D175/08 

FIELD: chemistry.

SUBSTANCE: composition of the two-component polyurethane film-forming composition consists of a polyol, a polyisocyanate prepared on the basis of 4.4'-diphenylmethane diisocyanate, ethyl acetate as a solvent. As a polyol component, a block copolymer of ethylene oxide and propylene oxide with a molecular weight of 2000-6000 is used, 1-10% of the hydroxyl groups of which are substituted for potassium-alcoholates. The composition further comprises γ-aminopropyltriethoxysilane, divalent metal chlorides CuCl_2, CoCl_2, MgCl₂, NiCl₂, CaCl₂, toluene and acetone as additional solvents.

EFFECT: protection of metal, wood, concrete from the negative impact of corrosive media, including ammonia vapors and hydrogen sulfide.

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