Thickeners dipping compounds

A thickener is often used to control the mix viscosity, which in turn affects pick-up on to the former. Table 15-3 lists a few of the thickener materials that have been used in dipping compounds. 

Because most latices have low viscosities by compounding, most of the waterborne rubber adhesives are sprayable. Thickeners such as fumed silicas can be added to increase viscosity and thixotropy. This means that even at relatively large viscosities (over 10 Pas) many water-based rubber adhesives can be sprayed. Dip and curtain applications require viscosities between 0.05 and 0.3 Pas, whereas brush application works with viscosities between 1 and 50 Pa s. 

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