Лако-красочные материалы — производство

Wetting and dispersing agents are additives that aid the incorporation of pigments and extenders in the paint. Pigments are an integral part of the paint that govern different aesthetic, performance and functional properties of the coating, as described in Section 3.1.1. For maximum effectiveness of pigments in imparting these properties, their homo­geneous distribution in the vehicle is of prime importance. Uniform dispersion of pigment is necessary to achieve important properties in paints such as high gloss, high opacity, good color development, color uniformity, rheology of the paint, and storage stability and to minimize defects such as settling, floating, flooding, syneresis and flocculation. In order to understand the role of wetting and dispersing agents, it will be helpful to briefly review the pigment dispersion process.