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:
Aug. 30, 2022
Filed:
Apr. 14, 2017
Borregaard As, Sarpsborg, NO;
Martin Andresen, Sarpsborg, NO;
Guro Elise Fredheim, Sarpsborg, NO;
Jerry Gargulak, Rothschild, WI (US);
David L. Oldroyd, Toronto, CA;
Hans Petter Pettersen, Sarpsborg, NO;
Anders Sjöde, Sarpsborg, NO;
Vibeke Bogetvedt Spernes, Sarpsborg, NO;
Bjørn Arild Jensen, Sarpsborg, NO;
BORREGAARD AS, Sarpsborg, NO;
Abstract
A method for preparing a low-air entraining, low viscosity lignosulfonate composition. The method comprises: a) applying heat to the crude lignosulfonate composition under suitable conditions to reduce sugar levels to below 10%, optionally below 5%, optionally below 3%), or optionally below 1%, on a dry basis; b) mixing a crude lignosulfonate composition with an effective amount of a source of trivalent ion to complex air entraining fatty acids and resin acids; c) lowering temperature to prevent viscosity buildup.