| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to a polyisocyanate composition which is suitable for producing material which contains polyisocyanurate, a method of producing such a composition, a curable composition containing such a polyisocyanate composition and epoxy resin, and polyisocyanurate material. The polyisocyanate composition contains polyisocyanate, a lithium halide and a urea compound. The urea compound has average molecular weight of 500-15000 and optionally contains biurat groups. The number of lithium halide moles per equivalent isocyanate is in the range of 0.0001-0.04. The number of equivalents (urea+biuret) per equivalent isocyanate is in the range of 0.0001-0.4.EFFECT: obtaining a polyisocyanate composition which is stable at normal conditions, which yields a curable composition with a long storage life.29 cl, 3 tbl, 3 ex |
