Acetate formation requires two enzymes&colon; phosphate acetyltransferase and acetate kinase. Ethyl acetate hydrolyses to give acetic acid and ethanol. Typical comonomers are vinyl acetate or methyl acrylate. The esters include ethyl acetate, "n"-butyl acetate, isobutyl acetate, and propyl acetate. It is prepared via the Claisen condensation of ethyl acetate. Isopropyl alcohol is esterified to give isopropyl acetate, another solvent. PVA is prepared by hydrolysis of polyvinyl acetate. Others are the cellulose-based cellulose acetate and celluloid (cellulose nitrate). Polymer dispersion adhesives are milky-white dispersions often based on polyvinyl acetate (PVAc). DMA is obtained with 99% yield referred to methyl acetate. Filters are typically made from cellulose acetate fibre. The encapsulants are commonly made from polyvinyl acetate or glass. It can be polymerized to give polyvinyl acetate (PVA). Hydrolysis of this acetate gives allyl alcohol. These were spherically moulded from ethylene-vinyl acetate (EVA) and thermoplastic polyurethanes (TPU).