Process for continuously producing polybutylene terephthalate
作者： Shuji Yamaguchi , Norifumi Maeda , Hidekazu Nakamoto , Susumu Harada
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摘要: Polybutylene terephthalate having good heat stability and excellent hydrolysis resistance is continuously produced in a series of first reactor for reacting an aromatic dicarboxylic acid comprising terephthalic as main ingredient or derivative thereof with glycol 1,4-butanediol ingredient, second polycondensating the oligomer from reactor, third further low polymerization product followed by fourth polycondensing polyester reactor. Another plurality reactors can be provided parallel to
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