Process for isolating boron-containing phenol/formaldehyde resins

US4232134A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Manfred Schmidt · Krefeld, DE
• Eberhard Bandtel · Krefeld, DE
• Walter Traudisch · Leverkusen, DE
• Georg Spott · Krefeld, DE
• Dieter Freitag · Krefeld, DE

Key dates

• Filing date: Nov 6, 1979
• Grant date: Nov 4, 1980
• Expiry date: Nov 6, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G79/08
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

Boron containing phenol/formaldehyde resins can be isolated from their reaction media by evaporating said resins in a spiral flow evaporator which has a ratio between throughput and tube cross section from 0.1 to 1.5 and a ratio between throughput and evaporation surface from 100 to 400.