Aqueous systems comprising an ionic polymer and a viscosity promoter, processes for their preparation, and uses thereof
AssigneeHercules Incorporated
InventorCharles L. Burdick
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Abstract
Aqueous compositions having advantageous Theological properties, preferably including any of enhanced yield stress, enhanced viscosity, and/or enhanced water retention, are disclosed. Included are low-viscosity compositions having high yield stress. The present invention also relates to processes for preparing and using the compositions. Compositions of the present invention comprise aqueous compositions of a polymer having a net ionic charge, and a viscosity promoter having an opposite net ionic charge. Compositions may also comprise a moderating agent to prevent precipitation and/or gelation.
Claims135
An aqueous composition comprising at least one first ionic polymer, said first ionic polymer being an anionic polymer, and at least one viscosity promoter, said at least one viscosity promoter comprising at least one second ionic polymer having a net ionic charge opposite to that of said at least first ionic polymer, wherein the charge ratio of the at least one first ionic polymer to the at least one viscosity promoter is greater than 1:1, said aqueous composition having a yield stress greater than about 5 dynes/cm2.
An aqueous composition prepared by combining at least one first ionic polymer, at least one viscosity promoter, and an aqueous medium, said at least one first ionic polymer being an anionic polymer and said at least one viscosity promoter comprising at least one second ionic polymer having a net ionic charge opposite to that of said first ionic polymer, wherein the charge ratio of first ionic polymer to viscosity promoter is greater than 1:1, said aqueous composition having a yield stress greater than about 5 dynes/cm2.
An aqueous composition comprising water, at least one first ionic polymer and at least one viscosity promoter, said at least one first ionic polymer being an anionic polymer and said at least one viscosity promoter comprising at least one ionic polymer having a net ionic charge opposite to that of said first ionic polymer, wherein the charge ratio of first ionic polymer to viscosity promoter is greater than 1:1, said aqueous composition having a yield stress at least about 10% higher than the yield stress of a composition having about the same viscosity as said aqueous composition and the same ingredients as said aqueous composition but for the absence of at least one of said at least first ionic polymer or at least one viscosity promoter.
An aqueous composition comprising water, at least one first ionic polymer and at least one viscosity promoter, said at least one first ionic polymer being an anionic polymer and said at least one viscosity promoter comprising at least one ionic polymer having a net ionic charge opposite to that of said first ionic polymer, wherein the charge ratio of first ionic polymer to viscosity promoter is greater than 1:1, said aqueous composition having a viscosity greater than the viscosity of a composition having about the same viscosity as said aqueous composition , and the same ingredients as said aqueous composition but for the absence of at least one of said at least first ionic polymer or at least one viscosity promoter, where the concentration of an ingredient is measured as weight % based on total weight.
An aqueous composition comprising at least one ionic polymer, at least one viscosity promoter, and at least one moderating agent, said at least one ionic polymer being an anionic polymer, said at least one viscosity promoter comprising at least one ionic polymer having a net ionic charge opposite to that of said first ionic polymer, wherein the charge ratio of the at least one ionic polymer to viscosity promoter is greater than 1:1, said moderating agent being present in an amount effective to prevent formation of a precipitate or gel, said precipitate or gel comprising an interactive complex of said at east one first ionic polymer and said at least one viscosity promoter.
Dependencies are inferred from the claim text.