Properties and applications: SIPERNAT represents a specific product range of precipitated silica, aluminum and calcium silicates. SIPERNAT 820 A is a sodium aluminum silicate with a high level of whiteness and reduced coarse particles, which is highly recommended for partial substitution of white pigments in emulsion paints, as a matting agent for silk glossy point systems and as a filler in printing inks. SIPERNAT 840 A is also used as a special-purpose filler for mechanical graphic papers, as an extender for titanium dioxide in papermaking, and as a white pigment for coated papers. It has beneficial effects on reducing possible ink bleeding, the printability, smoothness and friction coefficient of the paper, as well as enhancing pitch control.Information provided by Evonik |