Isobutene polymerization process
US5973219A · kind A · utility
3Cited by
2References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 26, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Mar 26, 2018 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F210/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for controlling the molecular weight distribution of polyisobutene formed during a liquid phase polymersiation reaction using a catalyst comprising boron trifluoride and taking place in a reactor having condensers associated with it which process involves introducing an electron donor above the level of liquid in the reactor to minimize the reaction of isobutene with free gaseous boron trifluoride in the condensers thereby minimizing the formation of unwanted polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.