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1,4-butanediol is widely used. In the United States and Western Europe, more than half are used to produce tetrahydrofuran, followed by γ -butyrolactone and poly (butylene terephthalate), which are rapidly developing engineering plastics.1,4-butanediol is used as chain increasing agent and polyester raw material to produce polyurethane elastomer and soft polyurethane foam. The esters obtained from 1C 4- butanediol are good plasticizers of cellulose, polyvinyl chloride, polyacrylate and polyester. 1,4- butanediol has good hygroscopic flexibility and can be used as gelatin softener and water absorbent. A treatment agent for cellophane and other unused paper. N- methylpyrrolidone, N-vinylpyrrolidone and other pyrrolidone derivatives can also be prepared. They are also used in the preparation of vitamin B6, pesticides, herbicides and solvents, plasticizers, lubricants, humidifiers for various processes, Softness, adhesives and electroplating industry brighteners.
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