[-CH2CH(OOCCH3)-]n. A colourless, non-toxic thermoplastic resin prepared by the polymerisation of vinyl acetate. Polyvinyl acetate (PVAC) was first produced in 1912 and was used as an artists medium in 1938. It is one of the most widely used water-dispersed resins. Polyvinyl acetate water-based emulsions have been used as latex house paints, artists' media and common household white glues. Setting is accomplished by the removal of water due to evaporation or absorption into a substrate. PVAC resins produce clear, hard films that have good weather resistance and withstand water, grease, oil and petroleum fuels. Additional properties are high initial tack, almost invisible bond line, softening at 30-458C, good biodegradation resistance, poor resistance to creep under load and low cost. Polyvinyl acetate resins and copolymers are also used as hot-melt adhesives, sealants and plastic wood. Synonyms: PVAc; PVAC; PVA (incorrect); poly(vinyl acetate); vinyl emulsion; Vinamul [Vinyl Products]; AYAT[Union Carbide]; Elmers® Glue-All [Borden]; Duratite White Glue [DAP]; Gelva® [Solutia]; Rivit Glue; Resin W; Polymer Tempera [Borden]; Vinavyl. Museum of Fine Arts, Boston (2000). [J. Cassar, R. de Angelis]