Branched polyesters prepared from macrocyclic poly(Alkylene Dicarboxylate) oligomers
US5387666A · kind A · utility
32Cited by
5References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1994 |
| Grant date | Feb 7, 1995 |
| Priority date | — |
| Expiry date | Jun 20, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/20
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Cyclic tin catalysts are employed for the preparation of branched polyesters from macrocyclic polyester oligomers. They are less susceptible than previously known catalysts to the presence of acidic impurities in the oligomer compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.