Dow Coming

Supplied by Midland Silicones Ltd., 19 Upper Brook Street, London, W. 1 also by Imperial Chemical Industries Ltd., 149 Park Lane, London, W. 1. An equivalent product is available from Dow.Coming, U.S.A. 

The highly stable and heat-resistant Silicone oils are very satisfsu tory. Midlsind Silicone or Dow-Coming fluid 650 or 600 (or the equivalent I.C.I. product) is recommended. Their only drawback is their high cost. 

Dowtherm Heat-Transfer Fluids. Dow Chemical Co. manufactures a family of heat-transfer fluids to meet differing appHcations. Dow Chemical also markets the Syltherm fluids produced by Dow-Coming Corp. Design and operating guidelines are offered in many of the company pubHcations describing the Dowtherm fluids. 

Syltherm Heat TransferTiquids, Dow Coming Corp., Midland, Mich. 

Richard A. Palmer Jerome M. Klosowski Dow Coming Corporation... 

The two largest global producers of trichlorosilane are Wacher in Europe and Dow Coming in the United States. In addition, there are three primary producers in Japan Tokuyama Soda, Mitsubishi Materials, and Osaka Titanium. 

Silicones, an important item of commerce, are widely available commercially (9,494). The principal manufacturers of silicone operate direct-process reactors to produce dimethyl dichi orosilane and, ultimately, polydimethyl siloxane. Typical plants produce more than 450 t per year. The siUcone industry is a global enterprise in the 1990s, with principal producers in the United States (Dow Coming, GE, and OSi), Europe (Wacker Chemie, Hbls, Rhc ne-Poulenc, and Bayer), and Southeast Asia (Shin-Etsu, Toshiba SiUcones, and Dow Coming, Japan). Table 15 Hsts the approximate sales of the principal producers for 1991. 

SUicones are suppUed as aqueous emulsions or as solvent solutions. Dow-Coming and OSi Specialties are primary manufacturers and suppUers. Emulsions are usuaUy appUed to fabrics by pa dding or exhaustion. Solvent solutions can be appUed by spraying. With either type of product, coappUcation of a catalyst is necessary. The level of sUicone soUds on the weight of fabric should be 0.5—1.5%. Most of the sUicone emulsions can be coappUed with durable-press resins. Curing occurs at about 150°C. 

---