Croda International, Inc.

Bayer Intellectual Property Gmbh

Waltraud Vorwerg

Sylvia Radosta

Volker Landschütze

Claus Frohberg

The present invention relates to alternan-carboxylic acid esters, to processes for the preparation of alternan-carboxylic acid esters, and to compositions comprising alternan-carboxylic acid esters and to the use of alternan-carboxylic acid esters. The invention relates to alternan-carboxylic acid esters which are emulsifiers.

Alternan derivatives

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 Ris a hydrocarbon group with 1 to about 100 carbon atoms, that may comprise one or more heteroatoms, Rand Rare each a hydrogen or a hydrocarbon group with 1 to about 20 carbon atoms that can comprise one or more heteroatoms, wherein Rand Rcan be the same or different, or Rand Rform 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 Ror Rgroups 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 R, Rand Rcan be selected independently from each other in multiple &#x2014;RNRRgroups. 

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

Functionalized alternan, comprising carboxy groups as functional groups, wherein the alternan can be described by the following formula (I) Alternan (I) wherein Ris a hydrocarbon group with 1 to about 100 carbon atoms, optionally featuring one or more heteroatoms, wherein the oxygen between 'Alternan' and Rin Formula (I) is an oxygen of an ether group, as well as the procedures for producing such a functionalized alternan in a aqueous medium or using an alcohol or an alcohol-water mixture as a reaction medium, and the use of this functionalized alternan. 

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Potsdam, Germany

Waltraud Vorwerg