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Water-dispersible thickener made of modified polyurethane with improved viscosity behavior in high-shear forces in aqueous systems.
Water-dispersible thickener made of modified polyurethane with improved viscosity behavior in high-shear forces in aqueous systems.
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机译:由改性聚氨酯制成的水分散型增稠剂,在水性体系中的高剪切力下具有改善的粘度性能。
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摘要
A water dispersible, modified polyurethane which is the reaction product of polyisocyanate, polyether polyol, modifying agent containing at least one pendant hydrophobic group and at least two active hydrogen moieties and capping agent. The modified polyurethane may also include a second type of modifying agent which does not have a pendant hydrophobic group. The modified polyurethane can be prepared by reacting the polyisocyanate and the polyether polyol and then adding the capping agent and finally the modifying agent with or without the second modifying agent. The modified polyurethane resists microbial attack, exhibits superior efficiency in thickening aqueous compositions under high shear conditions and achieves acceptable sag and leveling.
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