The Application of Calcium Sulfate Whisker in Styrene-acrylic Emulsions

摘要

The styrene-acrylic emulsions were prepared by copolymerization of styrene, acrylic acid and n-butyl acrylate; coatings were achieved by adding calcium sulfate whiskers and titanium dioxides at the presence of dispersing agents and rheological additives. The physical and mechanical properties as well as contact angles of coating films formed on tinplate were characterized in detail. The pencil hardness was slightly decreased; the contact angle was greatly decreased from 69.8° to 12° by adding the calcium sulfate to indicate the hydrophilic coating films may have self-cleaning properties.