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:
Jul. 28, 1998
Filed:
Oct. 02, 1996
Claus Wulff, Krefeld, DE;
Gottfried Zaby, Leverkusen, DE;
Thomas Bamberger, Duisburg, DE;
Klemens Kohlgruber, Kurten, DE;
Hugo Obermann, Dormagen, DE;
Stefaan De Vos, Gravenwezel, BE;
Gabriel Denecker, Heide-Kalmthout, BE;
Johan Vaes, Kalmthout, BE;
Tony Van Osselaer, Belsele, BE;
Bayer Aktiengesellschaft, , DE;
Abstract
The invention relates to a process for drying polymeric powders and polymeric agglomerates, in particular thermoplastic aromatic polycarbonate or other thermoplastic polymers such as, for example, acrylonitrile-butadiene-styrene copolymer, in the melt, whereby thermoplastic polymeric powders or polymeric agglomerates containing water or solvent or both are freed from adhering moisture and contained solvent, accompanied by melting, in an apparatus provided with rotating baffles for cleaning the walls of the apparatus and for distribution and transport of the material being dried, by heat input through the walls or through the rotating baffles or both as well as by heat input as a result of shearing action. The process of drying and that of melting for the subsequent granulation are thereby combined.