POLYURETHANE SYSTEMS HAVING PAINTABILITY WITHOUT SAG AND PRIMERLESS ADHESION ON CONCRETE Russian patent published in 2017 - IPC C08G18/18 C08G18/28 C08G18/72 C08G18/76 C09J175/08 

FIELD: chemistry.

SUBSTANCE: invention relates to polyurethane systems, including highly elastic sealants and adhesives. Building sealant and adhesive consist of two parts, where each includes a base component part A and an activator component part B, where at least one of part A or part B contains epoxy silane and at least one of part A or part B contains a melamine compound, wherein part of A includes a polyol and optionally epoxy silane and/or melamine compound, and part B includes a prepolymer reaction product, including residual groups xylenol or xylenol and additional polyol and polymeric isocyanate or an aromatic diisocyanate or polymeric isocyanate and an aromatic diisocyanate, optionally epoxy silane and/or melamine compound, and optionally, where part A additionally includes a plasticiser, also optionally, where part B additionally includes at least one epoxy silane or a mixture of at least one epoxy silane and at least one melamine compound.

EFFECT: technical result is obtaining non-sag sealant and adhesive, with properties of low modulus, high extensibility, good adhesion of paint coat and primerless adhesion on concrete surfaces.

40 cl, 7 tbl, 26 ex