METHOD OF PREPARING BETULIN-BASED POLYETHERS

摘要

manufacture of polymeric binders for thermoplastic composite materials. SUBSTANCE: polyether is prepared by polycondensation of betulin with dicarboxylic acid such as pimelinic or azelainic or sebacinic acids at betulin to acid molar ratio of 1:(1.01-1.04). Process is carried out in inert medium under constant stirring at 256-260 C. EFFECT: increased degree of conversion of monomers in the process of preparing polyether and lower melting temperature thereof. 2 cl, 1 tbl