Method for producing polyols

US8501904B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Klaus Lorenz · Worms, DE
• Arnulf Werner · Dormagen, DE
• Marcus Eichmann · Düsseldorf, DE

Key dates

• Filing date: Apr 6, 2009
• Grant date: Aug 6, 2013
• Expiry date: Sep 16, 2029

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G65/2648
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the preparation of a polyol which includes reacting an amino-group-containing starter compound with an alkylene oxide in the presence of a catalyst to form a polyol, wherein the catalyst is based on a compound selected from the group consisting of alkali metal hydroxides, alkali, alkaline earth metal hydrides, alkaline earth metal carboxylates, and alkaline earth hydroxides, and wherein the catalyst is present in an amount of from 0.004 to 0.1 wt. % based on the amount of polyol; and neutralizing the polyol with from 0.75 to 1 mol of sulfuric acid per mol of catalyst used.