HYBRID POLYURETHANE-POLYHYDROXYURETHANE COMPOSITION Russian patent published in 2023 - IPC C08G71/04 C08G18/48 C08G18/10 

FIELD: hybrid polyurethane-polyhydroxyurethane composition.

SUBSTANCE: present invention relates to a hybrid polyurethane-polyhydroxyurethane (PU-PHU) composition used to produce thermoset or thermoplastic polymers with the possibility of further processing of the hybrid PU-PHU polymer at a later stage. The hybrid polyurethane-polyhydroxyurethane composition is prepared through a process comprising the following steps: (i) reacting at least one isocyanate-containing compound in a stoichiometric excess with at least one isocyanate-reactive compound to form at least one prepolymer; (ii) reacting at least one said prepolymer with a compound containing at least one cyclic carbonate functional group to form a cyclic carbonate-terminated prepolymer; (iii) ring-opening reaction of said cyclic carbonate-terminated prepolymer with at least one difunctional amine compound and at least one polyfunctional amine compound, resulting in the above PU-PHU hybrid composition. The ring-opening reaction step is carried out at a temperature above room temperature.

EFFECT: these hybrid polyurethane-polyhydroxyurethane compositions are obtained in a simpler and more economical way, which allows a certain freedom of action regarding the final properties of the product, in particular mechanical properties.

16 cl, 4 tbl, 10 ex