Patent · US Expired

Method for producing polyisobutylenes

US6846903B2 · kind B2 · utility

10Cited by

8References

15Claims

0Family size

Assignee

BASF SE

Inventors

Thomas Wettling · Schifferstadt, DE
Dirk Borchers · Birkenheide, DE
Wim Verrelst · Edegem, BE
Hans Peter Rath · Havelsee, DE

Key dates

Filing date	Jul 13, 2001
Grant date	Jan 25, 2005
Priority date	—
Expiry date	Jul 13, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F2410/08
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Polyisobutenes are prepared by cationic polymerization of isobutene or isobutene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride as a catalyst, the catalytic activity of the boron trifluoride being partially or completely eliminated at a desired time by means of a solid deactivator, by a process in which the solid deactivator has boron trifluoride-binding primary, secondary, tertiary and/or quaternary nitrogen atoms and is insoluble in the reaction mixture.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.