Aliphatic polyester and preparation process thereof

Details Aliphatic polyester and preparation process thereof Aliphatic polyester and preparation process thereof

1995-01-05

1995-06-27

Acquah, Samuel A.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528272, 528302, 528491, 528492, 528493, 528495, 528496, 528503, C08F 616

Patent

active

054281261

ABSTRACT:
A preparation process of aliphatic polyester having a weight average molecular weight of 15,000 or more by conducting a direct polycondensation reaction of an aliphatic polyhydric alcohol or a mixed aliphatic polyhydric alcohol and an aliphatic polybasic acid or a mixed aliphatic polybasic acid, or additionally a hydroxycarboxylic acid or a mixed hydroxycarboxylic acid or an oligomer of the hydroxycarboxylic acid in a reaction mixture containing an organic solvent.
The aliphatic polyester thus obtained contains an extremely small amount of impurities, has low color and can exhibit satisfactory strength in the form of films, filaments and other shaped articles.

REFERENCES:
patent: 4632964 (1986-12-01), Altschuler et al.
patent: 4680381 (1987-07-01), Asada et al.
patent: 5138023 (1992-08-01), Sartori et al.
patent: 5171308 (1992-12-01), Gallagher et al.
patent: 5295985 (1994-03-01), Romesser et al.
patent: 5310865 (1994-05-01), Enomoto et al.

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