Patent · US Active

Process for preparing isobutene homopolymers or copolymers

US9458262B2 · kind B2 · utility

0Cited by

1References

6Claims

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Assignee

BASF SE

Inventors

Hannah Maria Koenig · Mannheim, DE
Rainer Urban · Ludwigshafen, DE
Klaus Muehlbach · Havelsee, DE
Thomas Wettling · Schifferstadt, DE
Uwe Rachwalsky · Ludwigshafen, DE
Stefan Hirsch · Neustadt, DE
Anne Berg · Merksem, BE
Helmut Mach · Heidelberg, DE

Key dates

Filing date	Oct 19, 2012
Grant date	Oct 4, 2016
Priority date	—
Expiry date	Aug 6, 2033

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F210/10
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Preparation of isobutene homopolymers or copolymers having a number average molecular weight of from 500 to 5 000 000 by polymerization of isobutene or an isobutene-comprising monomer mixture in the presence of a Lewis acid or a complex comprising a Lewis acid as polymerization catalyst, wherein the polymerization is carried out in the presence of at least one hemiacetal or full acetal which can be obtained by protic acid-catalyzed reaction of at least one C1-C12-hydrocarbyl alcohol with at least one aldehyde or ketone having from 1 to 12 carbon atoms.

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