| abstract |
METHOD FOR PRODUCING polybenzimidazole polikonde} 1satsiey aromatic tetraamine, diphenylether dicarboxylic acid ester and an aromatic monoanhydride in the melt by heating in an inert gas flow, characterized in that, with tselyustabilizatsii physicochemical and physical-mechanical properties when exposed to factors cold climate and deep solar UV radiation, Polycondensation is carried out in the presence of 0.1-1.0% 4-phenyl-2,2, 5,5-tetramethyl-3-imidazolin-3-oxide-1-oxime based on the weight of the polymer. (L 4 No. N) O1 4; |