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:
Feb. 01, 2005
Filed:
Jul. 11, 2002
Arie Cornelis Besemer, NL-3958 CC Amerongen, NL;
Anne Mieke Yvonne Wilhelmina Verwilligen, NL-3706 CN Zeist, NL;
Harm Jan Thiewes, NL-3931 CC Woudenberg, NL;
Dorine Lisa Van Brussel-verraest, NL-2411 WG Bodegraven, NL;
Arie Cornelis Besemer, NL-3958 CC Amerongen, NL;
Anne Mieke Yvonne Wilhelmina Verwilligen, NL-3706 CN Zeist, NL;
Harm Jan Thiewes, NL-3931 CC Woudenberg, NL;
Dorine Lisa Van Brussel-Verraest, NL-2411 WG Bodegraven, NL;
Other;
Abstract
A cationic cellulosic fibre containing between 1 and 30 cationic groups and between 0.1 and 20 aldehyde groups per 100 anhydroglucose units is a suitable basis for producing paper and tissue products without the necessity of using non-biodegradable cationic polymers as wet strength additives. The cationic cellulosic fibre can be obtained by oxidation of the fibre to introduce aldehyde groups, followed by reaction of part of the aldehyde groups with a nitrogen-containing reagent such as betaine hydrazide hydrochloride. The fibre is advantageously combined with an anionic polymer such as monoaldehyde carboxyl-starch or with anionic cyclodextrin.