Hydrophobic, water-insoluble polyurethane thickeners in granule or powder form and their use for thickening aqueous systems
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United States of America Patent
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Issued Date -
Apr 12, 2007
app pub date -
Oct 10, 2006
filing date -
Oct 12, 2005
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Abstract
The invention provides pulverulent, emulsifier-free, hydrophobic, polyurethane-based thickener preparations which lend themselves particularly well to incorporation into water-based inks, paints, and varnishes, and to their use as rheological additives for thickening preferably aqueous systems, comprising a) at least one water-soluble active polyurethane thickener substance; and b) at least one water-insoluble or sparingly water-soluble active polyurethane thickener substance.
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