INTERMEDIATE MATERIALS CONTAINING POLYISOCYANURATE Russian patent published in 2017 - IPC C08G18/00 C08G18/16 C08G18/22 C08G18/48 C08G18/58 C08G18/60 

FIELD: chemistry.

SUBSTANCE: method comprises provisio of a polyisocyanate composition, provision of at least one trimerization catalyst compound, provision of compounds containing a group with -CO-NH₂ structure, optionally dissolved in an organic solvent, provision of a trimerization catalyst composition by combining and mixing compounds containing a -CO-NH₂ group with at least one trimerization catalyst compound, combining and mixing the resulting trimerization catalyst composition with the polyisocyanate composition, composition reacting and optional cooling. Combination and mixing of the trimerization catalyst composition with the polyisocyanate composition is carried out in such amount that the number of equivalents of compounds containing the -CO-NH₂ group, with respect to the number of the trimerization catalyst equivalents is greater than 0.75 and less than or equal to 4. The obtained stable intermediate and additionally curable material containing polyisocyanurate contains free isocyanate groups, has an isocyanate number of 5-30 wt % and has a final concentration of polyisocyanurate compounds that does not vary by more than 10% of its initial value at room temperature and ambient pressure for several hours.

EFFECT: advantage of the material obtained is in the possibility to stop the polyisocyanurate formation intentionally to achieve the desired degree of polyisocyanate conversion to polyisocyanurate, with a possibility of additional curing at relatively low temperatures.

14 cl, 4 dwg, 3 tbl, 27 ex