Method for preparing a biodegradable copolyester
US7129301B2 · kind B2 · utility
19Cited by
4References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2005 |
| Grant date | Oct 31, 2006 |
| Priority date | — |
| Expiry date | Apr 28, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/183
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.