Patent · US Active

Method for changing the predefined mean molecular weight Mn during the continuous production of polytetrahydrofuranes or THF copolymers

US8138283B2 · kind B2 · utility

0Cited by

11References

12Claims

0Family size

Assignee

BASF SE

Inventors

Rolf Pinkos · Bad Dürkheim, DE
Jochen Steiner · Bensheim, DE
Stefan Käshammer · Schifferstadt, DE
Tobias Wabnitz · Mannheim, DE

Key dates

Filing date	Dec 10, 2007
Grant date	Mar 20, 2012
Priority date	—
Expiry date	Jun 12, 2028

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/2696
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention provides a process for changing the given mean molecular weight Mn in the continuous preparation of polytetrahydrofuran or tetrahydrofuran copolymers, the mono- or diesters of polytetrahydrofuran or of tetrahydrofuran copolymers by polymerizing tetrahydrofuran in the presence of a telogen and/or of a comonomer over an acidic catalyst, wherein

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