REPAIR LIQUID FOR CONVEYOR BELTS Russian patent published in 2018 - IPC C08G18/48 C08G18/08 C08G18/10 C08J7/04 C09J175/04 C09D175/04 C08L75/04 B29C73/02 B05D7/02 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to a composition based on polyurethane, used as an adhesive or filler for resilient substrates. Composition comprises a polyurethane prepolymer, a solvent, a plasticizer and a curing agent. Said prepolymer comprises a reaction product mixture of at least one aromatic polyisocyanate with at least one ether polyol and a reaction product of at least one aromatic polyisocyanate with at least one ester polyol. Said curing agent comprises a mononuclear aromatic polyamine, the amine functional groups of which are substituents on the same aromatic ring. Mole ratio of all amine functional groups in the polyamine to all isocyanate functional groups in the composition is at least 0.7 to 1.

EFFECT: such compositions based on polyurethane have proved effective, in particular as adhesives and fillers in the correction of imperfections of elastic substrates, in particular for the repair of conveyor belts, since these compositions can be applied in the shortest possible time, including at low temperatures, and at the same time have sufficient chemical activity to ensure rapid curing.

17 cl, 6 tbl, 12 ex