发明授权
US5648454A Process for producing high ductile polyesters 失效
生产高韧性聚酯的方法

Process for producing high ductile polyesters
摘要:
A process for making high ductile and high melting point polyesters comprising the step of contacting macrocyclic copolyester oligomers having structural units with C.sub.4 alkylene bridging radicals and structural units with bridging radicals other than C.sub.4 alkylenes, and a polymerization catalysts.
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