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:
Aug. 03, 2010
Filed:
Mar. 14, 2006
Klemens Mathauer, Heidelberg, DE;
Marianna Pierobon, Ludwigshafen, DE;
Tobias Petsch, Mörschied, DE;
Simone Schillo, Ludwigshafen, DE;
Michael Kerber, Weinheim, DE;
Frank Müller, Ludwigshafen, DE;
Klemens Mathauer, Heidelberg, DE;
Marianna Pierobon, Ludwigshafen, DE;
Tobias Petsch, Mörschied, DE;
Simone Schillo, Ludwigshafen, DE;
Michael Kerber, Weinheim, DE;
Frank Müller, Ludwigshafen, DE;
BASF Aktiengesellschaft, , DE;
Abstract
Process for production of polymer blends which are suitable as filter aids and are composed of polystyrene and of crosslinked water-insoluble polyvinylpyrrolidones via processing of the two components in an extruder, which comprises melting polystyrene in an extruder and then treating it with the polyvinylpyrrolidone, and adding, to the mixture of the components, from 0.1 to 10% by weight of water, based on the total amount of polystyrene and popcorn polymer, and extruding and comminuting the mixture.