Production of branched polyesters

Details Production of branched polyesters Production of branched polyesters

C - Chemistry, Metallurgy

08

G

C08G 63/80 (2006.01)

Patent

CA 2151054

Disclosed is an improvement in a process for producing branched polyesters wherein a precursor polyester is first formed and subsequently the precursor polyester is formed into particles and further polymerized in the solid state, wherein the improvement comprises contacting the particles while at a temperature of about 140 to about 2 °C below the melting point of the polyester with the vapor of water or an organic compound having at least one OH group.

Une amélioration a été apportée à un procédé de production de polyesters ramifiés. Un polyester précurseur est d'abord formé et est par la suite transformé en particules, puis polymérisé à l'état solide. L'amélioration consiste à mettre en contact les particules un moment, à une température d'environ 140 à environ 2 C au-dessous du point de fusion du polyester, avec la vapeur d'eau ou avec un composé organique possédant au moins un groupe OH.

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