High molecular weight copolyesters from macrocyclic oligoesters and cyclic esters
US6420048B1 · kind B1 · utility
42Cited by
77References
29Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 5, 2001 |
| Grant date | Jul 16, 2002 |
| Priority date | — |
| Expiry date | Jun 5, 2021 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High molecular weight copolyesters have been prepared from macrocyclic oligoesters and cyclic esters in the presence of a transesterification catalyst. The invention generally features a method of making a copolyester, a method of making a block copolymer of copolyester, and a copolyester prepared from macrocyclic oligoesters and cyclic esters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.