Modified polyesters
US6350822B1 · kind B1 · utility
32Cited by
2References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1999 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Oct 19, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G63/46
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer blend comprising a polyester, a polyfunctional acid anhydride wherein said polyfunctional acid anhydride has a functionality as described herein of three or more, and a polyhydric alcohol or precursor thereto wherein said polyhydric alcohol has a functionality of three or more, and wherein said molar ratio of said polyfunctional acid anhydride to the polyhydric alcohol or precursor thereto is in the range of 0.5:1 to (10×C):1, where C is the number of moles of alcohol or equivalent in the polyhydric alcohol or precursor thereto.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.