Croda launches Zephrym PD 4974 for iron oxide pigments
November 10, 2011
Croda has introduced Zephrym PD 4974, a low-VOC, high performance polymeric dispersant specially designed for iron oxide pigments. A key advantage of Zephrym PD 4974 is its ability to provide formulation stability in systems containing iron oxide pigments said the company. In one laboratory test, the paint, comprised of 70 percent red iron oxide pigment by weight, an aqueous binder and two percent dispersant Zephrym PD 4974 or competitive material, was compared for stability. The paint containing the competitive material separated after 120 hours (5 days) at room temperature. The same paint formulated with Zephrym PD 4974 never separated, even after 60 days of testing, the company said. In addition to its ability to stabilize formulations, Zephrym PD 4974 is able to enhance color development and reduce, or even eliminate, the level of thickeners in the formulation.