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US 8,523,993 B2Granted
Method for improving viscosity of thickeners for aqueous systems
AssigneeRohm and Haas Company
InventorLifeng Zhang
Life of this patent
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Abstract
A composition for a reduced viscosity hydrophobic thickener system for thickening a polymer-containing aqueous system, a method for providing a reduced viscosity thickener system for a polymer-containing aqueous system, and a method for increasing the viscosity of a polymer-containing aqueous system are disclosed.
Claims12
A method for providing a reduced viscosity thickener system for a polymer-containing aqueous system, the method comprising:
- a) providing a cyclodextrin-containing compound selected from the group consisting of alpha (α), beta (β), and gamma (γ) cyclodextrin having a hydrophobic cavity of a predetermined size;
- b) providing a hydrophobically modified aminoplast-ether copolymer thickener comprising at least one terminal phobe of a size capable of complexing with said hydrophobic cavity of said cyclodextrin-containing compound, wherein the lower limit of the solids content of the copolymer is 15 wt %;
- and
- c) mixing said cyclodextrin-containing compound provided in step (a) and said hydrophobically modified aminoplast-ether copolymer thickener provided in step (b), such that at least a portion of said cyclodextrin-containing compound of step (a) is complexed with said hydrophobically modified aminoplast ether thickener of step (b) in such a way that at least a portion of at least one of said phobes at least partially fills said cavity.
1 more element
Dependencies are inferred from the claim text.