Vinylidene chloride monomer

Poly(vinyhdene chloride) (PVDC) film has exceUent barrier properties, among the best of the common films (see Barrier polymers). It is formulated and processed into a flexible film with cling and tacky properties that make it a useful wrap for leftovers and other household uses. As a component in coatings or laminates it provides barrier properties to other film stmctures. The vinyUdene chloride is copolymerized with vinyl chloride, alkyl acrylates, and acrylonitrile to get the optimum processibUity and end use properties (see Vinylidene chloride monomer and polymers). 

Vinylidene chloride monomer is produced commercially in the United States by The Dow Chemical Company and PPG Industries. The monomer is produced in Europe by Imperial Chemical Industries, Ltd., in the United Kingdom Badische Anilin und Soda Eabnk and Chemische Werk Hbls in Germany Solvay S.A. and Amaco et Compagnie in Erance and The Dow Chemical Company in the Netherlands. The monomer is produced in Japan by the Asahi Chemical Company, Kureha Chemical Industries, and Kanto Denka Kogyo Company. 

Vinylidene Chloride Monomer , 9, Midland (Mich ), Dow Chemical Co., 1968 The reaction products formed with ozone are particularly dangerous. 

VINYLIDENE CHLORIDE MONOMER AND POLYMERS. Vinyli dene chloride copolymers most valuable property is low permeability to a wide range of gases and vapors. From the beginning in 1939, the word Saran has been used for polymers with high vinylidene chloride content, and it is still a trademark of The Dow Chemical Company in some countries. Sometimes Saran and poly(vinylidene chloride) are used interchangeably in the literature. 

Manufacture. Vinylidene chloride monomer can be conveniently prepared in the laboratory by the reaction of 1,1,2-trichlorocthanc with aqueous alkali ... 

Richard A Nugent, Upjohn Company. Kalamazoo. Ml. Analgesics, Antipyretics, and Antiinflammatory Agents B, E. Obi, The Dow Chemical Compuny, Midland. Ml. Vinylidene Chloride Monomer and Polymers... 

Dow Chemical Company, Vinylidene Chloride Monomer, 9, Dow Chemical Company, Midland, MI, 1966, p.B 232. 

Vinylidene chloride is hepatotoxic, but does not appear to be a carcinogen (13—18). Pharmacokinetic studies indicate that the behavior of vinyl chloride and vinylidene chloride in rats and mice is substantially different (19). No unusual health problems have been observed in workers exposed to vinylidene chloride monomer over varying periods (20). Because vinylidene chloride degrades rapidly in the atmosphere, air pollution is not likely to be a problem (21). Worker exposure is the main concern. Sampling techniques for monitoring worker exposure to vinylidene chloride vapor are being developed (22). 

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