A kind of suspended calcium carbonate suitable for water-based coatings
Calcium carbonate, chemical formula CaCO3, exists in aragonite, calcite, chalk, limestone, marble and other rocks, but also for the animal bones or shells of the main components, because of its wide range of sources, low price, non-toxic and harmless, is one of the largest amount of industrial filler, widely used in paper, paint, plastics, rubber, adhesives and other fields. However, unmodified calcium carbonate surface energy is high, easy to agglomerate, and poor affinity with organic polymers, compatibility, dispersion is not good, so the material interface defects, affecting mechanical properties. In order to improve the compatibility between calcium carbonate and different organic polymers, and to expand its application areas, it is necessary to carry out different surface treatment.
Commonly used calcium carbonate surface modifiers mainly include the following three categories: surfactants, coupling agents, organic polymers. Surfactants such as stearic acid are the most commonly used surface modifiers for calcium carbonate. At present, due to the market demand, most of the modified calcium carbonate on the market is developed in the direction of hydrophobicity and lipophilicity, and the modified calcium carbonate is mainly used in the industries of plastics, rubber and paints.
In order to meet the general direction of "oil to water" in the coating industry, our company has developed a calcium carbonate that can be stably suspended in the water phase for the customers of water-based coatings, which has better compatibility and dispersion in the water phase, and the coatings prepared have good abrasive properties, adhesion, storage stability, and a certain degree of viscosity enhancement, which can appropriately reduce the dosage of thickening agent.
Hydrophilic suspended functional calcium carbonate is suitable for all water-based coatings with calcium carbonate, such as water-based craft coatings, water-based polyurethane leather coatings, water-based polyurethane adhesives, polyurethane road coatings, interior and exterior latex paints, art paints, wood paints, water-based epoxy flooring, railroad primer and so on, for more application information, please contact us to exchange ideas and discuss, and Xufeng Powder will be happy to serve you!
