Patent · US Expired

Method for activating double metallocyanide-compounds

US7312363B2 · kind B2 · utility

1Cited by

3References

3Claims

0Family size

Assignee

BASF SE

Inventors

Michael Stoesser · Schifferstadt, DE
Edward Bohres · Ludwigshafen, DE
Georg Heinrich Grosch · Bad Dürkheim, DE
Wilfried Sager · Mutterstadt, DE

Key dates

Filing date	Feb 6, 2003
Grant date	Dec 25, 2007
Priority date	—
Expiry date	Jul 9, 2023

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G65/2663
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

The present invention relates to a process for reacting epoxides with an initiator compound in the presence of a double metal cyanide compound as a catalyst, said process having a shortened induction period, and the double metal cyanide compound being activated by adding the epoxide to a mixture of double metal cyanide compound and initiator compound at an internal reactor pressure of less than 1 bar, and also to the polyethers themselves obtainable by such a process.

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