Process for producing polyester
US6350850B1 · kind B1 · utility
4Cited by
1References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 12, 2000 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Jul 12, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/16
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is a process for producing a polyester from a dicarboxylic acid and a diol, which comprises polycondensing the dicarboxylic acid and the diol under the presence of a distannoxane catalyst. Also, the present invention is a process for producing a polyester which comprises melt polycondensing the dicarboxylic acid and the diol under normal pressure in the presence of the distannoxane catalyst, wherein an organic solvent which dose not dissolved any of the dicarboxylic acid, the diol and the polyester produced from the dicarboxylic acid the diol is present and, whereby, two phases are mainly present.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.