CURABLE POLYISOCYANATE COMPOSITION INCLUDING EPOXY RESIN Russian patent published in 2015 - IPC C08G59/06 C08G59/40 C08G59/44 C08L63/00 

FIELD: chemistry.

SUBSTANCE: described curable composition for producing a polyisocyanurate, which is obtained by combining and mixing a polyisocyanate composition including a polyisocyanate, a lithium halide and a urea compound, obtained by reacting polyisocyanates with amines, characterised by average molecular weight of about 500-15000 and, optionally, containing biuret groups, where the number of moles of lithium halide per isocyanate equivalent is in the range of 0.0001 to 0.04 and the number of urea + biuret equivalents per isocyanate equivalent is in the range of 0.0001 to 0.4, as well as an epoxy resin composition, which includes an epoxy resin, a compound having the structure NH₂-CO-R, which comprises a carboxamide group having the structure -CO-NH₂ and optionally a solvent which has no reactive isocyanate groups, and optionally where the number of carboxamide equivalents per epoxy equivalent is 0.0005-1 and preferably 0.005-0.7 and most preferably 0.01-0.5, and the number of epoxy equivalent per isocyanate equivalent is in the range of 0.003 to 1. Disclosed is a method of producing said curable composition by combining and mixing the polyisocyanate composition and epoxy resin composition, wherein the amount of the epoxy resin composition is such that the number of epoxy equivalents per isocyanate equivalent is 0.003-1. Described also are polyisocyanurates, which include a material produced by reacting the curable composition at high temperature, and a method of producing a polyisocyanurate, which includes said material, by reacting the curable composition at high temperature.

EFFECT: longer life of the curable composition.

13 cl, 33 ex, 4 tbl