Polyisobutylene process
US4558170A · kind A · utility
29Cited by
1References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1984 |
| Grant date | Dec 10, 1985 |
| Priority date | — |
| Expiry date | Sep 20, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F10/10
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyisobutylene is prepared from a mixed C.sub.4 hydrocarbon feedstream using an AlCl.sub.3 --HCl catalyst system wherein the HCl is introduced separately into the feedstream to form organochloride in the feedstream. Polymer product having a very narrow molecular weight distribution is obtained over the Mn range of 700 to 3,000. Dispersants derived from this polyisobutylene exhibit substantially improved performance in lubricating oil compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.