Лако-красочные материалы — производство

Metal soaps such as aluminum stearate have been used as thi­ckening agents for a long time in systems rich in hydrocarbon solvents such as alkyd-based systems. As a result of intermolecular hydrogen bonding, they behave as high MW compounds and conse­quently increase the viscosity, but under the effect of shear force, the hydrogen bonds break and viscosity is reduced. For incorpora­tion in paints, they must be swollen in hydrocarbon solvent under gentle heating and should be added at the grinding stage. One of the limitations of this type of thickener is a plasticizing effect in the final coating, which reduces the hardness.