Method for preparing a biodegradable copolyester

Details Method for preparing a biodegradable copolyester Method for preparing a biodegradable copolyester

2006-10-31

2006-10-31

Acquah, Samuel A. (Department: 1711)

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C528S277000, C528S279000, C528S281000, C528S282000, C528S285000, C528S296000, C528S298000, C528S300000, C528S302000, C528S306000, C528S307000, C528S308000, C528S308600, C525S444000

Reexamination Certificate

active

07129301

ABSTRACT:
A method for preparing a biodegradable copolyester includes: (a) optionally preparing an aromatic prepolymer by reacting a first aromatic dicarboxylic compound with a first aliphatic glycol; (b) reacting the aromatic prepolymer with a second aromatic dicarboxylic compound and a second aliphatic glycol so as to form a first reaction product; (c) reacting the first reaction product with an aliphatic dicarboxylic compound so as to form a second reaction product; and (d) performing polycondensation of the second reaction product.

REFERENCES:
patent: 6020393 (2000-02-01), Khemani
patent: 6399716 (2002-06-01), Chung et al.
patent: 6414108 (2002-07-01), Warzelhan et al.
patent: 6713595 (2004-03-01), Chung et al.
patent: 2003/0036626 (2003-02-01), Hayes et al.

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