Low-odor, higher molecular weight polyether polyols, a process for producing them, and their use for the production of polymers, cosmetics and pharmaceutical products synthesized from polyether polyols

US5672768A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Pramod Gupta · Bedburg, DE
• Gundolf Jacobs · Rösrath, DE
• Joel Leuridan · Ekeren, BE

Key dates

• Filing date: Jan 8, 1997
• Grant date: Sep 30, 1997
• Expiry date: Jan 8, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61Q19/00
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

Low-odor, higher molecular weight polyether polyols are produced by purifying the polyether polyols at temperatures of 110.degree. to 150.degree. C. and pressures of 10 to 70 hPa with the addition of 5 to 30% by weight of water, wherein the water is passed in finely divided form, with a droplet diameter of about 5 to 100.mu., through the polyether polyols to be purified for a time of metered addition of 1 to 5 hours.