Alternan polysaccharide that is functionalized with nitrogen groups that can be protonated, or with permanently positively charged nitrogen groups

US9670290B2 · kind B2 · utility

Assignee

• CRODA INTERNATIONAL PLC · GB

Inventors

• Volker Landschütze · Berlin, DE
• Sylvia Radosta · Michendorf, DE
• Waltraud Vorwerg · Potsdam, DE

Key dates

• Filing date: Aug 23, 2013
• Grant date: Jun 6, 2017
• Expiry date: Sep 24, 2033

Classification

• Technology area (CPC D): Textiles; Paper
• CPC primary: D21H17/24
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Functionalized alternan polysaccharide, comprising nitrogen groups or permanently positively charged nitrogen groups that can be protonated as functional groups and can be described by the following formula, for instance: (I) wherein R1 is a hydrocarbon group with 1 to about 100 carbon atoms, that may comprise one or more heteroatoms, R2 and R3 are each a hydrogen or a hydrocarbon group with 1 to about 20 carbon atoms that can comprise one or more heteroatoms, wherein R2 and R3 can be the same or different, or R2 and R3 form a 4-8 membered heterocyclic ring together with the nitrogen to which they are bound; Wherein said ring can be condensed with one or more additional isocyclic or heterocyclic rings, wherein the nitrogen can be bound to one of the R2 or R3 groups by way of a double bond and then bears a positive charge, wherein the nitrogen in Formula (I) is optionally protonated, and wherein the residues R1, R2 and R3 can be selected independently from each other in multiple —R1NR2R3 groups.