Zwitterionic polymerization catalyst
US6465385B1 · kind B1 · utility
5Cited by
16References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 2000 |
| Grant date | Oct 15, 2002 |
| Priority date | — |
| Expiry date | Feb 11, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S526/943
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention is a new catalyst compositions and methods of making and using the same. These compositions comprise organometallic salts with large noncoordinating anions which contain at least one terminal unsaturation and the high dipole moment Zwitterions that these can isomerize into. During polymerization, the ionic pairs are dispersed within the polymer particles. The length of space separating the positive and negative end of the Zwitterion also increase as a consequence of polymerization. Additionally, polymerization proceeds without the need of a co-catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.