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:
May. 22, 2018
Filed:
Feb. 05, 2014
Covestro Deutschland Ag, Leverkusen, DE;
Hans-Juergen Thiem, Dormagen, DE;
Ingmar Hermsdorfer, Krefeld, DE;
Birgit Mannel, Muelheim an der Ruhr, DE;
Andreas Seidel, Dormagen, DE;
Eckhard Wenz, Cologne, DE;
Hans-Juergen Klankers, Leverkusen, DE;
COVESTRO DEUTSCHLAND AG, Leverkusen, DE;
Abstract
The invention relates to a method for producing compositions containing vinylaromatic copolymers which are obtained in an emulsion polymerization process and comprise production-related salt inclusions. Said compositions are characterized by an improved surface quality once the extruded polymer, before being granulated, or the granulate, after being granulated, has been moistened by bringing the polymer in contact with liquid water in a water bath, a tube system filled with water, or a dipping tank, thus making the compositions suitable for producing molded articles having a class A surface that remains flawless over time.