Branched polyesters prepared from macrocyclic poly(Alkylene Dica

Details Branched polyesters prepared from macrocyclic poly(Alkylene Dica Branched polyesters prepared from macrocyclic poly(Alkylene Dica

1994-06-20

1995-02-07

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528299, 524784, C08G 6385

Patent

active

053876660

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 et al.
Liu et al., Polymer Preprints, Am. Chem. Soc., 33(1), 1111-1112 (1993).

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