Method for polymerizing macrocyclic poly(alkylene dicarboxylate)

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

1994-06-20

1995-02-14

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...

528283, 528299, 524784, C08G 6385

Patent

active

053897196

ABSTRACT:
Cyclic tin catalysts are employed for the preparation of branched polyesters from macrocyclic polyester oligomers. They are less susceptible than previously known catalysts to the presence of acidic impurities in the oligomer compositions,

REFERENCES:
patent: 3969319 (1976-07-01), Hutton et al.
patent: 5039783 (1991-08-01), Brunelle et al.
patent: 5214158 (1993-05-01), Brunelle et al.
patent: 5231161 (1993-07-01), Brunelle et al.
patent: 5321117 (1994-06-01), Brunelle
Liu et al., Polymer Preprints, Am. Chem. Soc., 33(1), 1111-1112 (1993).

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