公开(公告)号：US20250059471A1

公开(公告)日：2025-02-20

申请号：US18721211

申请日：2022-12-14

Applicant: BASF SE

Inventor： Stephan BAUER ,  Johannes MAUL ,  Thomas Alexander KROENER ,  Claudia ESPER ,  Keith E. GUTOWSKI ,  Daniel Scott NIEDZWIECKI ,  Alexandros LAMPROU

IPC: C11D3/37 ,  C08F251/00

Abstract: This invention deals with water-soluble graft polymers comprising as polymer base a polysaccharide, and as grafted side chains at least one water soluble ethylenically unsaturated monomer, such unsaturated monomer comprising at least one sodium carboxylate unit, being produced by radically initiated polymerization reaction, and further employing during the polymerization at least one organic compound capable of complexing metal ions, preferably iron, containing in its structure at least one carboxyl-group which may be partially or fully present as acid-group or deprotonated in salt-form, their manufacture and uses, for example in laundry or dishwashing, and a method of stabilizing such graft polymers. The graft polymers have a solid content after manufacturing of at least 20% and with at least 70% of the solid content. The aqueous solution of a grafted polymer is the characterized by a Gardner color less than 4.0 and a color stability at least 6 months with an increase of maximum one Gardner color value unit at room temperature.