POLYURETHANE-BITUMEN COMPOSITION Russian patent published in 2005 - IPC

FIELD: production of polyurethane-bitumen composition for encapsulants, hydraulic insulating and anticorrosion insulating coats for various surfaces (concrete, metal, etc).

SUBSTANCE: claimed composition contains (mass %): bitumen/shale mastic 70-95; prepolymer mixture 5-30. Said prepolymer mixture is based on polyoxypropylenetriols and isocyanate component, wherein the first prepolymer is based on mixture of polyoxypropylenetriols with molecular mass of 300-6000 and toluylenediisocyanate in ratio of (80-85):(20-15), respectively, and the second one is based on mixture of polyoxypropylenetriols with molecular mass of 300-6000 and hexamethylenediisocyanate in ratio of (65-80):(50-20), respectively, and mass ration of the first and second prepolymers in mixture is (80-50):(50-20).

EFFECT: material with increased elongation, tensile strength, decreased water adsorption, attrition, controllable coat hardness and elasticity.

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