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:
Jan. 25, 2011
Filed:
May. 19, 2005
Miroslav Antal, Pointe-Claire, CA;
Peter Volf, Beaconsfield, CA;
Ivan I. Pikulik, Pointe-Claire, CA;
Makhlouf Laleg, Pointe-Claire, CA;
Jan Martin Strmen, Baie D'Urfe, CA;
Jarka Matous, Beaconsfield, CA;
Miroslav Antal, Pointe-Claire, CA;
Peter Volf, Beaconsfield, CA;
Ivan I. Pikulik, Pointe-Claire, CA;
Makhlouf Laleg, Pointe-Claire, CA;
Jan Martin Strmen, Baie D'Urfe, CA;
Jarka Matous, Beaconsfield, CA;
FPInnovations, Pointe-Claire, Quebec, CA;
Abstract
A new class of polymeric additives for papermaking is disclosed as well as a process for their manufacture, a method for their use and a paper sheet containing the addition. The additives can be used in paper manufacture as agents for improving retention, paper machine operation and the strength properties of the product. The additives are manufactured from a microbial biomass. The biomass that contains acetyl amino groups or other amides is chemically modified by hydrolysis of the amides to form primary amino groups. Under neutral or acidic conditions these primary amines become cationic, which assures a good absorption of the additive onto fibres and fines of pulp that is generally of anionic nature.