Rheological Properties of Emulsion Polymers

Some latex products exhibit a unique non-Newtonian flow behavior (e.g., a series of rheology-controlled emulsion polymers, Joncryl 89, 77, and 74, originally developed at S. C. Johnson Wax). The viscosity of these types of latex products first decreases rapidly and then levels off (Newtonian behavior) as the shear rate is increased. These emulsion polymers offer excellent rheological properties, resolubility (for cleaning coating machines), gloss, and hardness, and they are widely used in the market of overprint varnishes. 

Incorporation of cosolvents into water-based coating and printing systems reduces the efficiency of associative rheology modifiers because of the greatly 

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