Lignin derivative for reducing dishwasher film
AssigneeBorregaard AS
InventorsRoss Johannes Ellis, Guro Elise Fredheim
Life of this patent
Estimating the term…
Abstract
The present invention relates to the use of lignin derivatives for reducing and/or preventing deposits on an object during a machine dishwashing process. Further, the present invention relates to a method for reducing and/or preventing deposits on an object and to a machine dishwasher detergent formulation comprising the lignin derivative described herein.
Claims15
A machine dishwasher detergent formulation comprising a lignin derivative for reducing and/or preventing deposits on an object during a machine dishwashing process, wherein the lignin derivative comprises —COOR groups and sulfonate groups, wherein R is a cation and wherein the carbon atoms of said —COOR groups were already contained in native lignin from which the lignin derivative is derived,
- wherein the lignin derivative has a molecular weight of less than 50,000 Da and comprises —COOR groups in an amount of more than 4 wt. %, based on dry matter,
- wherein the sulfonate groups are not derived from a reaction with chlorosulfonic acid and/or wherein the —COOR groups are not derived from a reaction with chloroacetic acid, and
- wherein the lignin derivative does not comprise —COOR groups other than those for which the carbon atom was already contained in the native lignin.
A method for reducing and/or preventing scale on an object, said method comprising a step of contacting said object during a machine dishwashing process with a lignin derivative, wherein the lignin derivative comprises —COOR groups and sulfonate groups,
- wherein R is a cation and wherein the carbon atoms of said —COOR groups were already contained in native lignin from which the lignin derivative is derived,
- wherein the lignin derivative has a molecular weight of less than 50,000 Da and comprises —COOR groups in an amount of more than 4 wt. %, based on dry matter,
- wherein the sulfonate groups are not derived from a reaction with chlorosulfonic acid and/or wherein the —COOR groups are not derived from a reaction with chloroacetic acid, and
- wherein the lignin derivative does not comprise —COOR groups other than those for which the carbon atom was already contained in the native lignin.
Dependencies are inferred from the claim text.