Process for producing aliphatic polyester

Details Process for producing aliphatic polyester Process for producing aliphatic polyester

1995-10-31

1997-04-01

Acquah, Samuel A.

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

Synthetic resins

From carboxylic acid or derivative thereof

528272, 528297, 528361, 528503, 524783, C08G 6385

Patent

active

056166818

ABSTRACT:
A method for producing an aliphatic polyester having a biodegradability and a higher melting point than conventional aliphatic polyester by suppressing a volatile component generated by side reaction or decomposition reaction with industrially good efficiency and economically in a relatively short period of time, the method enabling a polymerization at vacuum which permits a use of general vacuum pump. The aliphatic polyester can be obtained, for example, by a ring-opening copolymerization of a cyclic acid anhydride with a cyclic ether in a presence of a zirconium compound. The aliphatic polyester also can be obtained by performing a polymerization of raw materials of the aliphatic polyester so as to have a degree of viscosity in the range of 10-10,000 poise when 0.1-30 hours elapsed after the reaction started at reaction temperature of the reaction system under conditions of reaction temperature in the range of 180.degree. C. to 280.degree. C. and reaction pressure in the range of 0.3 mmHg to 3.0 mmHg.

REFERENCES:
patent: 3883901 (1975-05-01), Coquard et al.
patent: 5391700 (1995-02-01), Itoh et al.

Affiliated with

Also associated with

Rating

Process for producing aliphatic polyester does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing aliphatic polyester, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing aliphatic polyester will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-539926