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:
Jun. 16, 2009
Filed:
May. 10, 2004
Joachim Pakusch, Speyer, DE;
Markus Koppers, Bad Fallingbostel, DE;
Wolfgang Gaschler, Heidelberg, DE;
Heinrich Sack, Hassloch, DE;
Juergen Schmidt-thuemmes, Neuhofen, DE;
Hans-juergen Denu, Friedelsheim, DE;
Joachim Pakusch, Speyer, DE;
Markus Koppers, Bad Fallingbostel, DE;
Wolfgang Gaschler, Heidelberg, DE;
Heinrich Sack, Hassloch, DE;
Juergen Schmidt-Thuemmes, Neuhofen, DE;
Hans-Juergen Denu, Friedelsheim, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
A process for preparing a polymer powder by evaporating the volatile constituents from an aqueous dispersion of a film-forming polymer P, wherein prior to the evaporation of the volatile constituents the aqueous polymer dispersion still comprises drying assistants T, present in an amount of from 0.1 to 80% by weight, based on the polymer P of the dispersion, and there being used as drying assistant T polyvinylformamide. The polyvinylformamide used preferably has a K value (KW), determined by the method of Fikentscher in accordance with DIN 53726, of from 5 to 50.