Manufacture of polyvinyl chloride involves polymerizing vinyl chloride. Phthalates are plasticizers providing durability and flexibility to plastics such as polyvinyl chloride. An organotin compound is commercially applied as stabilizers in polyvinyl chloride. PVA is prepared by hydrolysis of polyvinyl acetate. Vinyl flooring differs in manufacturing process and polyvinyl chloride content. Polymer dispersion adhesives are milky-white dispersions often based on polyvinyl acetate (PVAc). This dressing is made up of synthetic polymers such as methacrylate and polyvinyl pyrrolidine. These plates are made of cement or sand coated with a polyvinyl chloride sheath. ASA is compatible with some other plastics, namely polyvinyl chloride and polycarbonate. VCM is the precursor to polyvinyl chloride. The encapsulants are commonly made from polyvinyl acetate or glass. It can act as UV stabilizer for polyvinyl chloride. Lead is frequently used in the polyvinyl chloride coating of electrical cords. Polymers that are formed by free-radical mechanisms such as polyvinyl chloride are usually atactic. A number of microorganisms can degrade polyvinyl acetate.