MACROMOLECULAR CHEMISTRY AND POLYMERIC MATERIALS Composite Polymeric Materials Based on Polyisocyanurates and Polyurethanes

Network poly(urethane isocyanurate) systems were synthesized from polyurethanes and poly- isocyanurates, and the process for preparing composite materials based on them was examined. Polyurethane materials find growing applications, primarily thanks to a unique combination of high hard- ness and elasticity, and also to the exceedingly high tear and wear resistance. Composite polymeric mate- rials (CPMs) have been prepared from polyisocyan- urate and polyurethane compounds. These materials preserve elasticity at any elastic modulus and contain a voluminous highly porous support exerting no ef- fect on the elastic properties of the CPMs. Previously CPMs have been prepared from polyisocyanurates, but these materials show poor wear resistance, and the low-modulus samples based on them exhibit an ac- celerated weather aging. Therefore, it seemed appro- priate to prepare materials containing a polyurethane component (1, 2). In this study, we examined the process for prepar- ing composite polymeric materials from polyisocyan- urate and polyurethane compounds. EXPERIMENTAL As polymeric binders we used compounds of var- ied composition, based on 2,4-toluylene diisocya-