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Boost for Epoxy Chemistry Carbide and Carbon's peracetic acid process makes almost any double bond an epoxidation target ITH more t h a n 375 experimental epoxies already m a d e as a result of its new peracetic acid process ( C o n C E N trates, April 16 ) , Carbide a n d Carbon Chemicals is looking to peracetic as the basis for an entirely new segment of its chemical business. Many of the n e w epoxies h a v e been heretofore unattain able; t h e new process now enables the large volume a n d low-cost production of peracetic whose reactivity can be used for custom epoxidations and for the manufacture of new peracetic acid derivatives. T h e process i s the culmination of an intensive five-year research program at Carbide's South Charleston, W. Va., re search and development lab. Benjamin Phillips, assistant director of research, h e a d e d the research group. Attempts to m a k e t h e higher epox ides by the method used for ethylene oxides ( silver catalysts and inhibitors to minimize complete combustion) h a v e been unsuccessful. Phillips, speaking before the ACS Division of Chemical Marketing and Economics at Dallas, stated that the new route is a commer cially practical and economical one for higher epoxide syntheses. T h e air-oxidation of acetaldehyde has given Carbide hundreds of millions of pounds of acetic acid each year. Be
lieving that the oxidation proceeded through a peroxide intermediate, the company decided, several years a g o , to investigate this approach to the produc tion of peracetic. The new process involves cutting off t h e oxidation at the proper time. It gives peracetic, which c a n then b e used to react with a host of olefins. I n the syntheses of t h e epoxides, acetic acid is formed as a by-product. T h u s in making u p epoxides by this route, the company will have just about the same amount of acetic acid for sale as previ ously. Carbide indicates the over-all reac tion as: Ο CH3CHO
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Peracetic Acid
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Ο Epoxide • Looking A h e a d . Now in t h e pilot plant stage, plans are well under m y for t h e construction of a commercial unit capable of producing 2 5 to 5 0 mil lion p o u n d s p e r year of peracetic and
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derivatives. Some acid will be m a d e for direct sale. Site of t h e new facility will b e South Charleston, W. Va. Carbide believes t h e acid will result in scores of n e w chemicals for m a n y present and other yet undiscovered in dustrial uses. The company which was the first producer of commercial q u a n tities of two basic epoxides, ethyleneand propylene oxide, has long been in terested in the economical syntheses of higher epoxides. So far, it has syn thesized a number of compounds which should find application in the manufac ture of plasticizers, resins, coatings, and odorants. These include 2,3-diisobutylene oxide, styrene oxide, a n d vinylcyclohexene dioxide, and it is now offering these and others in experi mental samples.
Aeronautical Silicone Union Carbide has developed a general purpose silicone compound which, according to the company, is t h e first such compound fully meeting t h e requirements of Aeronautical Ma terials Specifications 3 3 0 I B . T h e compound, Union Carbide X1034R Silicone Rubber Compound, resists high temperatures, has a very low compression set and low moisture pickup, company says, and is especially n o t e d for ease of handling. X-1034R is red-colored, with 4 0 Dur omet er hardness. It can b e molded, extruded or calendered with conventional or special catalysts. C 1
• Liquid a d h e s i v e for bonding polyu r e t h a n e foams is offered b y Borden's chemical division. Called Arcco C 518, the solution will also bond polyurethane to p a p e r or fabric. C 2 • Adhesives line introduced by Paisley Products is based on synthetic resins, latices, lacquers and other organics. T h e new line, called Pliastic, is said to provide maximum adherence to the particular plastic materials -which the packaging industry is now using. Most versatile of the new series is Pliastic-241, company says. It is built around synthetic latices and is recom m e n d e d for surface treated polyethylenes, Mylar, and heavily waxed glassines. Others in the series are effective for use with PHofilm, cellulose acetate, polystyrene, saran, and cello p h a n e packages. C 3
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• PH.FKYL ETHYL · ALCOHOL •REACTIVE .DILUENT FOR EP0XY; RESINS
Further useful information on keyed Chemical items mentioned is readily available . . .
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