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By F.E. Bailey

A complete remedy of a giant relations of polymers helpful in quite a lot of purposes in such fields as car, pharmaceutical, beauty, metal-working, mining, commercial coating, cloth, development, and residential furniture. Summarizes the chemistry and mechanisms; presents uncomplicated prepa

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H. Millet, Iron Age Engr. 25 (8):51 (1948). Bibliography G. O. , Glycols, Reinhold Publishing Company, ACS Monograph, New York, 1952. A. S. Malinovski, Epoxides and Their Derivatives, translated from Russian, 1965 Israel Program for Scientific Translation, Jerusalem, 1965. Page 35 4— Polymerization of 1,2-Epoxides I— Introduction The 1,2-epoxides, or vicinal epoxides, include the alkylene oxides, the simplest of which is ethylene oxide. The first reported polymerization of ethylene oxide was by Wurtz in 1863 (1), who described the reaction of ethylene oxide heated in a sealed tube with water and, later, with alkali and with zinc chloride catalysts.

The major epoxy component made is the diglycidylether of bisphenol A. Specialty elastomers based on epichlorohydrin have been produced by both Hercules and BF Goodrich. Elastomers have been made by copolymerization of epichlorohydrin with ethylene oxide and by terpolymerization of epichlorohydrin with ethylene Page 24 oxide and propylene oxide. In 1984, BF Goodrich disclosed a method of polymerizing epichlorohydrin to make a specialty elastomer, HYDRINTM 100, via a unique cationic polymerization process.

This distribution predicts that, as the average polymer molecular weight becomes large, the ratio of the weight to number average molecular weight approaches unity, provided certain reaction conditions are met: All reaction chains are initiated simultaneously. Monomer reacts only with active sites on the polymer chain. There is no reaction-chain termination other than total depletion of monomer. During this time, a number of applications for the polyethylene glycols, which are still in use, were developed, including use in pharmaceuticals and cosmetics; plastics, rubber-processing aids, and mold-release agents; textile lubricants and dye dispersants; metal working, polishing, and electroplating; and as a binder for synthetic detergents.

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