Continuous method for producing amino- and/or phenoplasts

US6500371B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Heinz Berbner · Prüm, DE
• Hans Etling · Schifferstadt, DE
• Erhard Guenther · Ludwigshafen, DE
• Tilman Sirch · Schifferstadt, DE
• Hans D. Zettler · Havelsee, DE

Key dates

• Filing date: Feb 7, 2000
• Grant date: Dec 31, 2002
• Expiry date: Feb 7, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29K2061/20
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a continuous process for preparing aminoplastics and/or phenolics, in which a precondensate solution is prepared in a first extruder (14), the precondensate solution is continuously fed, with addition of additives, to a second extruder (20) with partial filling in the feed section (E) and devolatilization section (G), devolatilized in the second extruder (20) and then formed to give a molding composition or an end product. The process is particularly suitable for preparing melamine resins, in particular melamine-formaldehyde resins, as well as for preparing urea-formaldehyde resins.