Preparation of ketone-formaldehyde resins

US7183372B2 · kind B2 · utility

Assignee

• Degussa AG · DE

Inventors

• Werner Andrejewski · Dorsten, DE
• Andreas Wenning · Nottuln, DE
• Patrick Glockner · Haltern am See, DE

Key dates

• Filing date: Aug 23, 2004
• Grant date: Feb 27, 2007
• Expiry date: Aug 23, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31942
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for preparing ketone-formaldehyde resins, especially acetophenone- and cyclohexanone-formaldehyde resins, having a low water content and high thermal stability and yellowing resistance, and a process for their production and their use.