PRODUCTION METHOD FOR POLYBUTYLENE TEREPHTHALATE

• Main Authors: KONISHI NORIKAZU, SUZUKI TAKAYUKI, MATSUZONO SHINICHIRO, BURK MARK, UTSUNOMIYA MASARU, IZAWA YUSUKE, CLARK WARREN, JAPS MICHAEL
• Format: Patent
• Language: English; French; Japanese
• Published: 12.12.2013
• Subjects: BEER; BIOCHEMISTRY; CHEMISTRY; COMPOSITIONS BASED THEREON; ENZYMOLOGY; FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIREDCHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERSFROM A RACEMIC MIXTURE; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MICROBIOLOGY; MUTATION OR GENETIC ENGINEERING; ORGANIC MACROMOLECULAR COMPOUNDS; SPIRITS; THEIR PREPARATION OR CHEMICAL WORKING-UP; VINEGAR; WINE

The purpose of the present invention is to provide a production method for polybutylene terephthalate (PBT) having good color tones, said method using a biological resource-derived 1, 4-butanediol (BG). This production method for PBT has: a step in which a dicarboxylic acid component and a diol component including a raw material 1, 4-BG having a nitrogen atom content of 0.01-50 ppm by mass are esterized or transesterified; and a polycondensation step in which PBT is obtained from the reaction product. The gamma-butyrolactone content in the raw material 1, 4-BG is 1-100 ppm by mass. La présente invention a pour but de proposer un procédé de fabrication de poly(téréphtalate de butylène) (PBT) ayant de bonnes teintes de couleur, ledit procédé utilisant un 1,4-butanediol (BG) issu d'une ressource biologique. Ce procédé de fabrication de PBT comporte : une étape dans laquelle un composant acide dicarboxylique et un composant diol comprenant un 1,4-BG de départ ayant une teneur en atome d'azote de 0,01-50 ppm en masse sont estérifiés ou transestérifiés ; et une étape de polycondensation dans laquelle le PBT est obtenu à partir du produit de réaction. La teneur en gamma-butyrolactone dans le 1,4-BG de départ est 1-100 ppm en masse.