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US 5,296,470 AGranted
Graft polysaccharides and their use as sequestering agents
AssigneeRhone-Poulenc Chimie
InventorsSophie Vaslin, Christine Vidil
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Abstract
Graft polysaccharides comprising a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000 and grafts grafted thereon derived from a water-soluble ethylenically unsaturated monomer. The graft polysaccharides are useful as sequestering agents for alkaline-earth metal ions.
Claims13
Graft polysaccharides comprising:
- a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000,
- and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
A sequestering agent for cations comprising:
- a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000,
- and 20 to 70% by weight of grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
A sequestering agent for alkaline-earth metal ions comprising:
- a polymer backbone consisting essentially of a polydextrose having an average-weight molecular mass of less than 10,000,
- and 20 to 70% by weight grafts derived from at least one water-soluble ethylenically unsaturated monomer, wherein said grafts are grafted onto said polymer backbone and said weight percent is based on the total weight of said polymer backbone.
Dependencies are inferred from the claim text.