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. 16, 2013
Filed:
Sep. 11, 2012
Anton Esser, Mannheim, DE;
Rainer Blum, Mannheim, DE;
Joachim Kuhn, Frankenthal, DE;
Marc Leduc, Speyer, DE;
Ralf Hemel, Worms, DE;
Anton Esser, Mannheim, DE;
Rainer Blum, Mannheim, DE;
Joachim Kuhn, Frankenthal, DE;
Marc Leduc, Speyer, DE;
Ralf Hemel, Worms, DE;
BASF SE, Ludwigshafen, DE;
Abstract
A process for the production of paper, board and cardboard by draining a paper stock containing interfering substances in the presence of polymers which contain vinylamine units and which have an average molar mass Mof at least 1 million, a high-consistency stock first being prepared, at least one polymer containing vinylamine units and having an average molar mass Mof at least 1 million and a degree of hydrolysis of from 1 to 20 mol % being metered into the high-consistency stock, the high-consistency stock being diluted to a low-consistency stock by adding water, and the low-consistency stock being drained, the polymers being hydrolyzed homo- or copolymers of N-vinylcarboxamides additives for reducing deposits in the wire part, press section and drying section of paper machines.