Patent · US Expired

Polymerization of isobutylene

US4691072A · kind A · utility

21Cited by

7References

2Claims

0Family size

Assignee

BASF SE

Inventors

Hans Schick · Berlin, DE
Erich Kolk · Bad Dürkheim, DE
Karl-Heinz Fauth · Wattenheim, DE
Heinrich Mohr · Bischofswerda, DE

Key dates

Filing date	Jul 22, 1986
Grant date	Sep 1, 1987
Priority date	—
Expiry date	Jul 22, 2006

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F10/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The conversion is increased in the preparation of polyisobutylene by polymerization of isobutylene in a polymerization zone at from 0.degree. to -130.degree. C. in the presence of from 0.01 to 1.0% by weight of a boron trifluoride catalyst, from 0.001 to 1.0% by weight of a molecular weight regulator and from 30 to 90% by weight of a low-boiling solvent which is inert under the reaction conditions, by a process in which the content of but-1-ene in the monomeric isobutylene is kept constant at from 1.9 to 2.1, in particular 2.0, % by weight.

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