What neutralizing agents work best with UCAR POLYPHOBE™ Rheology Modifiers?
UCAR POLYPHOBE products are low pH associative thickeners used to build rheology in coating, sealant, and adhesive systems. A UCAR POLYPHOBE is typically active at an optimum pH of 8.0 – 9.5; therefore, it is necessary to raise the pH of formulated systems with basic additives for neutralization. It was found that neither sodium hydroxide nor potassium hydroxide is best for neutralizing UCAR POLYPHOBE in exterior coatings. The sodium or potassium cations are non-volatile and will remain in the cured film, increasing the water sensitivity of the film. Blisters and wrinkles can form.
