HYBRID POLYURETHANE-POLYHYDROXYURETHANE COMPOSITION

The present invention relates to a hybrid polyurethane-polyhydroxyurethane (PU-PHU) composition obtained by a process comprising the following steps:(i) Reacting at least one isocyanate containing compound, in stoichiometric excess, with at least one isocyanate-reactive compound, resulting in the formation of at least one prepolymer,(ii) Reacting said at least one prepolymer with at least one cyclic carbonate functional group containing compound, leading to the formation of a cyclic carbonate-terminated prepolymer,(iii) Ring-opening reaction of said cyclic carbonate-terminated prepolymer with at least one amine functional group containing compound resulting in said hybrid PU-PHU composition,characterised in that said ring-opening reaction step is carried out above room temperature, preferably above 20° C., more preferably above 25° C.