Acrylic Emulsion Paints for Exterior Wood Surfaces

In 1959 approximately 69.4 million gallons of emulsion or latex paints were sold, 55 percent butadiene styrene, 20.3 percent polyvinyl acetate, and 11.1 percent acrylic. Water-thinned paints increased more than 50 percent between 1954 and 1958. Advantages of these paints are easy application, excellent appearance, fast drying, excellent resistance to blistering, outstanding durability, resistance to checking, reduced fire hazard, and applicability to damp surfaces. Disadvantages are less solids than oil-based paints, problems of bleed-through, and a shorter history of performance. For use on wood, pigment contents of 30 to 35 percent perform best. Eleven formulations of water-thinned emulsions were exposed on southern pine in Pennsylvania in 1953 and generally showed good resistance to chalking, grain cracking, flaking, erosion, and mildew after 7 years.

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