A Novel Technique to Improve Hiding In Titanium Dioxide Pigmented Architectural Coatings
Recent developments have shown that smectite minerals can be used to reduce the cost of TiO2 by $15 or more per 100 gal of
paint.
For purposes of this study, two formulations were chosen that represent fairly straightforward adaptations of typical interior grade architectural coatings. The first is a 30% volume solids, 60 PVC flat vinyl acrylic formula. It contains (per 100 gal of paint) 125 lbs of TiO2, 245 lbs of 6-micron calcium carbonate, and 75 lbs of delaminated kaolin. The second is a 30% volume solids, 28 PVC semigloss vinyl acrylic with (per 100 gal of paint) 125 pounds of TiO2 and 106 lbs of 6-micron calcium carbonate. The controls for each formula were thickened with 5 lbs of hydroxyethylcellulose per 100 gal. All formulations used in this study are presented in their totality in the sidebar.