Method for polymerizing macrocyclic poly(alkylene dicarboxylate)

Details Method for polymerizing macrocyclic poly(alkylene dicarboxylate) Method for polymerizing macrocyclic poly(alkylene dicarboxylate)

1995-11-30

1997-01-07

Acquah, Samuel A.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

528279, 502 50, C08K 310, C08G 6385

Patent

active

055918000

ABSTRACT:
Macrocyclic polyester oligomers are converted to linear polyesters by contact at a temperature of about 160.degree.-300.degree. C. with a cyclic titanium catalyst such as di-(1-butyl)-2,2-dimethylpropane-1,3-dioxytitanate, bis(2,2-dimethyl-1,3-propylene) titanate or 1-(1-butoxy)-4-methyl-2,6,7-trioxa-1-titanabicyclo[2.2.2]octane. Such catalysts have high activity and produce linear or branched polyesters of very high molecular weight.

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