PROCEDIMIENTO PARA PREPARAR COMPOSICIONES TERMOENDURECIBLES CONTENIENDO ENLACES OXAZOLIDONA Y URETANO.

摘要

A process for the production of a thermoset composition containing oxazolidone and urethane linkages characterised in that it comprises reacting a polyisocyanate and a prepolymer containing at least one terminal epoxy group and at least one non-terminal, secondary hydroxy group is disclosed. …A thermoset composition characterised in that it comprises oxazolidone and urethane linkages in the recurring unit which is substantially free of isocyanurate linkages, the said oxazolidone linkages being present in the polymer backbone and being separated from one another by ester linkages and the said urethane linkages being present in side chains attached to the polymer backbone is also disclosed. …The present invention offers advantages over the prior art.