Лако-красочные материалы — производство

These dispersions are generally low viscosity liquids, with solids in the range of 35-50% and appearance ranging between opalescent and white, depending on the make up and particle size of the emulsion. Many commercially available emulsions contain coalescent solvents. Most emulsions contain some surfactant added to stabilise the emulsion and to form micelles. The surfactant, unless part of the acrylic resin, can be considered as a ‘weak spot’ for water resistance of the film, leading to blushing or spotting. As a general rule, emulsion polymers are much higher (by a factor of 3 or 4 to 20 or more) in molecular weight than either solvent based acrylics or inverted water based dispersions.

Emulsion resins can have vast differences in finished properties by copolymerising different acrylic monomers and styrene, and utilising certain monomers to give specific groups in the back bone, such as carboxy groups. Properties can range from hard, brittle films to soft, flexible (even tacky) films by varying the amounts and choice of monomers. This is similar to solvent based counterparts.