Production process of aliphatic polyester

Details Production process of aliphatic polyester Production process of aliphatic polyester

2003-10-08

2009-11-24

Jagannathan, Vasu (Department: 1796)

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

Synthetic resins

From carboxylic acid or derivative thereof

C528S272000, C528S355000, C528S357000, C528S361000

Reexamination Certificate

active

07622546

ABSTRACT:
A process for producing an aliphatic polyester by subjecting a cyclic ester to ring-opening polymerization, which comprises adding water to a cyclic ester purified to the extent that a water content is at most 60 ppm to control an overall proton concentration in the cyclic ester, thereby controlling at least one physical property among melt viscosity, molecular weight and yellowness index of the resulting aliphatic polyester.

REFERENCES:
patent: 2668162 (1954-02-01), Lowe
patent: 3442871 (1969-05-01), Schmitt et al.
patent: 5342918 (1994-08-01), Howelton et al.
patent: 5412067 (1995-05-01), Shinoda et al.
patent: 6437565 (2002-08-01), Early et al.
patent: 07-233246 (1995-09-01), None
patent: 08-301864 (1996-11-01), None
patent: 09-328481 (1997-12-01), None
patent: 10-025288 (1998-01-01), None
patent: 10-158371 (1998-06-01), None
patent: 2000 119269 (2000-04-01), None
patent: WO 0214303 (2002-02-01), None
Handbook of Thermoplastic Polymers, 2002, Chapter 2, pp. 59-103.
K. Chujo et al, “Ring-Opening Polymerization of Glycolide”,Die Makromolekulare Chemie, 100 (1967) pp. 262-266.

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