PROTECTIVE COMPOSITION FOR COVERING AND SOAKING SURFACES OF CONCRETE, METAL, WOODEN, PLASTIC AND GLASS CONSTRUCTION MATERIALS Russian patent published in 2014 - IPC C09D175/08 C08G18/65 C08G18/32 C08G18/24 

FIELD: chemistry.

SUBSTANCE: protective composition contains polyoxypropylenetriol with molecular weight 3000-5000, 4,4'-diphenylmethanediisocyanate-based polyisocyanate, tin dibutyldilaurate and solvent, it also additionally contains diphenylolpropane, and diacetyl as solvent with the following component ratio, wt. p.: polyoxypropylenetriol with molecular weight 3000-5000 30-70; 4,4'-diphenylmethanediisocyanate-based polyisocyanate 65-70; tin dibutyldilaurate 0.1-0.2; diphenylolpropane 70-30; diacetyl of formula C₄H₆O₂ 125 and carbon isotopes ¹³C. Ratio of quantity of carbon isotopes ¹³C to the total quantity of carbon in protective layer constitutes from 0.005 to 0.5.

EFFECT: increased hardness and strength of coatings, reduction of time for composition hardening and improvement of its environmental friendliness.

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