Process for the preparation of phenol resins using by-products of the chlorination of butadiene as reactants

US5219976A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Abele
• Hans-Josef Buysch · Krefeld, DE
• Heinrich Schrage · Krefeld, DE
• Hugo Vernaleken · Walsrode, DE

Key dates

• Filing date: Feb 15, 1991
• Grant date: Jun 15, 1993
• Expiry date: Feb 15, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L21/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

By-products from the chlorination of butadiene may be reacted with phenols in the presence of iron catalysts to form Novolak type phenol resins.