COAPUR™817 W是不含溶剂和烷基酚乙氧基化物（APE）的聚氨酯增稠剂，设计用于各种类型的水基配方，尤其是无溶剂配方。 COAPUR™817 W可以单独使用，也可以与其他聚氨酯增稠剂或其他类型的流变改性剂（如丙烯酸或纤维素增稠剂）结合使用。 COAPUR™817 W由于具有与各种粘合剂的高缔合效果，因此具有出色的涂层性能。COAPUR™817 W在中等和高剪切速率下特别提高了粘度，以改善工具 加载，涂膜，找平和刷拖。由于其独特的流变特性，COAPUR™817 W还可以防止低PVC配方中的沉降和下垂趋势。 典型分析 性质：水溶性非离子聚氨酯 外观（20°C）：白色液体 活性成分（％）：17.5 溶剂：水+高分子化合物体系，不含VOC pH（25°C）：6.5 比重（20°C）：1.04 布氏粘度（100 rpm，25°C）：大约 3000 mPa.s 优势 COAPUR™817 W不含溶剂，烷基酚乙氧基化物（APE），对大多数无溶剂和含溶剂的粘合剂具有高反应活性，成本低，易于操作，易于使用或与之组合使用各种低剪切有效增稠剂。 应用 COAPUR™817 W的低粘度和渐进的增稠效果使其非常易于操作。由于其显着的效果，它的使用也非常经济。将COAPUR™817 W作为唯一增稠剂加入半光和缎面分散涂料中，可提高储存稳定性和涂料产量。 它减少了对工具重新加载和重复涂层的需求，并确保出色的流平性而没有任何流挂。与低剪切力有效的增稠剂（如THIXOL™53 L或VISCOATEX™730）结合使用，COAPUR™817 W可优化高PVC配方的涂层性能。特别地，当纤维素醚仅用于消光分散涂料中时，COAPUR™817 W能够弥补不良的膜形成和流平性。 如果用COAPUR™817 W代替部分或全部纤维素醚，则干膜的耐水性和耐擦洗性可以得到显着改善。 COAPUR™817 W应优选在掺入粘合剂后，在配方结束时添加。这样的后添加可以更好地控制最终粘度。 COAPUR™817 W的有效性可能会根据粘合剂的类型和浓度而略有不同。COAPUR™ 817 W is a solvent and Alkyl Phenol Ethoxylate (APE) free polyurethane thickener designed for alltypes of water based formulations, especially the solvent free formulations. COAPUR™ 817 W can be used sole or in combination either with other polyurethane thickeners or with othertypes of rheology modifiers such as acrylic or cellulosic thickeners. COAPUR™ 817 W provides excellent coating properties due to its high associative effectiveness with everykind of binder.COAPUR™ 817 W increases specifically the viscosities at medium and high shear rates in order to improve tool load, film build, levelling and brush drag. Thanks to its exclusive rheological features, COAPUR™ 817 W alsoprevents from settling and sagging tendency in low PVC formulations.  TYPICAL ANALYSIS Nature: Water soluble non ionic polyurethane Appearance (20°C): Whitish liquid Active content (%): 17.5 Solvent: Water + polymeric compound system, VOC free pH (25°C): 6.5 Specific gravity (20°C): 1.04 Brookfield viscosity (100 rpm, 25°C): About 3 000 mPa.s  ADVANTAGES COAPUR™ 817 W is:Solvent free,Alkyl Phenol Ethoxylate (APE) free,Cost-effective due to its high reactivity towardsmost of the solvent free and solvent containingbinders,Liquid, easy-to-handle,Easy to use sole or in combination with every kindof low shear effective thickener.  APPLICATIONS COAPUR™ 817 W is very easy to handle thanks to its lowviscosity and to its progressive thickening effect. Its use isalso very economical thanks to remarkable effectiveness.The incorporation of COAPUR™ 817 W, as sole thickenerin semi-gloss and satin dispersion paints, improves storagestability and coating yield. It reduces the need for tool re-load and repeated layers,and ensures excellent levelling without any sag.Combined with low shear effective thickeners such asTHIXOL™ 53 L orVISCOATEX™ 730,COAPUR™ 817 W optimizes the coating properties of highPVC formulations. In particular, COAPUR™ 817 W is ableto compensate the poor film build and levellingencountered when cellulosic ethers are used sole in mattdispersion paints. Water and scrub resistance of dry films can be significantlyimproved if part or whole of the cellulosic ether amount isreplaced by COAPUR™ 817 W. COAPUR™ 817 W should be preferably added after thebinder incorporation, at the end of formulation. Such apost-addition allows a better control of the final viscosity. The effectiveness of COAPUR™ 817 W can slightly differaccording to the type and to the concentration of binderused.