Rational Design of new Pigment Dispersants by understanding Polymer-Pigment Interactions

摘要

The development of coatings systems with improved sustainability is a major driving force in today's coatings industry and such formulations require new or adapted raw materials. Pigment dispersants play an important role in enabling the paint manufacturer to successfully achieve this transfer. They contribute to efficient paint processing, formulation flexibility and excellent coating performance. Especially for demanding pigments with a large specific surface area, highly efficient dispersants are necessary. Using controlled free radical polymerization (CFRP) novel block copolymers with a precise control over the molecular structure are accessible. Improved pigment anchoring and compatibility in different resin systems can be tailor-made by the optimum design of the block copolymer. This requires an in-depth scientific understanding of the interactions of the dispersant polymers in the complex colloidal systems of pigment pastes and paints.