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. 04, 2013
Filed:
May. 04, 2011
Christian Jehn-rendu, Shanghai, CN;
Hans-georg Lemaire, Limburgerhof, DE;
Oliver Koch, Wachenheim, DE;
Tilo Habicher, Speyer, DE;
Sylke Haremza, Neckargemuend, DE;
Markus Hoffmann, Barcelona, ES;
Christian Jehn-Rendu, Shanghai, CN;
Hans-Georg Lemaire, Limburgerhof, DE;
Oliver Koch, Wachenheim, DE;
Tilo Habicher, Speyer, DE;
Sylke Haremza, Neckargemuend, DE;
Markus Hoffmann, Barcelona, ES;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to a novel pulp composition for paper or solid board production comprising an oxidized recovered paper pulp and/or an oxidized mechanical pulp into which from 1 to 500 mmol of carboxyl groups per kg and from 1 to 200 mmol of aldehyde groups per kg have been introduced by oxidation. The invention also relates to paper and solid board based on such a pulp composition and also to a process for producing such paper or solid board. The invention also relates to the use of oxidized recovered paper pulp and/or oxidized mechanical pulp for improving the retention and drainage properties of a pulp suitable for producing paper or solid board. The invention further relates to the use of oxidized recovered paper pulp and/or oxidized mechanical pulp for improving, i.e., increasing, the dry strength of paper and solid board.