Production of poly(trimethylene terephthalate)

Details Production of poly(trimethylene terephthalate) Production of poly(trimethylene terephthalate)

C - Chemistry, Metallurgy

08

G

C08G 63/88 (2006.01) C08G 63/183 (2006.01) C08G 63/80 (2006.01)

Patent

CA 2239905

Disclosed herein is a novel crystalline form of low molecular weight poly(trimethylene terephthalate). This crystalline form may be produced from molten or glassy low molecular weight poly(trimethylene terephthalate) material by means of rapid heat transfer to or from the material. The poly(trimethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight.

L'invention porte sur une nouvelle forme cristalline de poly(triméthylène téréphtalate) de faible masse moléculaire. Il est possible de produire cette forme cristalline à partir de poly(triméthylène téréphtalate) de faible masse moléculaire fondu ou vitreux par un apport rapide de chaleur à cette substance ou un dégagement de chaleur provenant de celle-ci. La composition à base de poly(triméthylène téréphtalate) constitue une matière première appropriée pour une polymérisation à l'état solide aux fins de la production de polymère de masse moléculaire élevée.

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