ISOCYANATE-EPOXY-FOAM SYSTEM Russian patent published in 2018 - IPC C08G18/12 C08G18/18 C08G18/20 C08G18/32 C08G18/42 C08G18/48 C08G18/66 C08G101/00 C08J5/00 

FIELD: chemistry.

SUBSTANCE: present invention relates to a process for producing a hard foam comprising reacting at least one polyisocyanate with a mixture comprising at least one polyepoxide, water, and at least one additional compound with acidic hydrogen atoms, wherein said reaction is carried out in the presence of a metal-free Lewis base having at least one nitrogen atom, the catalyst being selected from a group consisting of 1,8-diazabicyclo-5,4,0-undecene-7-ne, N-methyl-N'-(dimethylamino-methyl)piperazine, pentamethyl-diethylenetriamine, methylimidazole, and mixtures thereof and derivatives thereof. Also disclosed are hard foam obtained by the said method, and the use of such a hard foam for the manufacture of insulating materials, vacuum insulating panels, refrigerators, building elements, propeller blades of wind power plants or elements for the construction of boats and cars.

EFFECT: technical result is providing a method for obtaining hard foam materials having improved compressive strength, bending strength, tensile strength, as well as good temperature stability, good resistance to the influence of the environment and chemicals.

15 cl, 2 tbl, 5 ex