METHOD OF OBTAINING URETHANE-ISOCYANURATES Russian patent published in 2018 - IPC C08G18/76 C08G18/02 C08G18/09 C08G18/10 

FIELD: chemistry.

SUBSTANCE: present invention relates to a method for producing a polyurethane isocyanurate polymer. Method comprises (a) curing a mixture of at least one aromatic polyisocyanate and at least one polyol in the presence of at least one isocyanate trimerisation catalyst and at least one urethane catalyst to form a polyurethane-isocyanurate polymer having a glass transition temperature of at least 100 °C, and (b) exposure of the polymer obtained at step (a) to water at a pressure of 150 kPa to 5,000 kPa and a temperature of at least 70 °C.

EFFECT: polyurethane-isocyanurate polymer obtained has a glass transition temperature of at least 150 °C and can be used as a coating for autoclaving, pipelines or other pipelines for hot aqueous media or for chemical production, cooling water lines or in other applications where the product is exposed to high temperature and high humidity or liquid water.

16 cl, 3 tbl, 19 ex