Modified starch compositions
OwnerDavid J. Neivandt, Joseph M. Genco +1inventors
InventorsDavid J. Neivandt, Joseph M. Genco, Mark A. Paradis
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Abstract
A modified starch composition is made by combining a starch with a polymer and cooking the combined starch and polymer composition under acidic conditions, the cooking producing anionic groups on the polymer. Another modified starch composition is made by cooking a starch and combining the cooked starch with a cooked polymer, the cooking producing anionic groups on the polymer, and the polymer having been cooked separately from the starch. The compositions may be used as clarifying aids for removing solids and other suspended materials from aqueous dispersions, and in particular as retention aids in the manufacture of paper.
Claims25
A modified starch composition made by combining a starch with a polymer and cooking the combined starch and polymer composition under acidic conditions, the cooking producing anionic groups on the polymer.
A modified starch composition made by cooking a starch and combining the cooked starch with a cooked polymer, the cooking producing anionic groups on the polymer, and the polymer having been cooked separately from the starch.
A method of making a modified starch composition, the method comprising combining a starch with a polymer to form a starch composition, and cooking the starch composition under acidic conditions, the cooking producing anionic groups on the polymer.
A method of making a modified starch composition, the method comprising cooking a starch, cooking a polymer separately from the starch, and combining the cooked starch with the cooked polymer, the cooking producing anionic groups on the polymer.
A dry mix comprising a dry mixture of starch and polyacrylamide which can be cooked under acidic, basic or neutral conditions.
Dependencies are inferred from the claim text.