The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 2002
Filed:
Feb. 07, 2000
Heinz Berbner, Mörlenbach, DE;
Hans Etling, Dannstadt-Schauernheim, DE;
Erhard Guenther, Hassloch, DE;
Tilman Sirch, Schifferstadt, DE;
Hans Dieter Zettler, Grünstadt, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
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 ( ), the precondensate solution is continuously fed, with addition of additives, to a second extruder ( ) with partial filling in the feed section (E) and devolatilization section (G), devolatilized in the second extruder ( ) 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.