C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/85 (2006.01) C08G 63/16 (2006.01) C08G 63/60 (2006.01) C08G 63/78 (2006.01)
Patent
CA 2365485
A method of synthesizing biodegradable aliphatic polyesters from one or more aliphatic dicarboxylic acids or diesters of the said acids and one or more linear or branched aliphatic glycols, comprising a first esterification or transesterification step and a second deglycolation under vacuum step, in which the catalyst is monobutylstannoic acid both for the esterification or transesterification step and for the deglycolation under vacuum step.
La présente invention concerne un procédé de synthèse de polyesters aliphatiques biodégradables à partir d'un ou plusieurs acides dicarboxyliques aliphatiques ou de diesters de ces acides, et d'un ou plusieurs glycols aliphatiques linéaires ou ramifiés; ce procédé comprenant une première étape d'estérification ou de transestérification et une seconde étape de suppression de glycols sous vide, dans lesquelles le catalyseur est un acide monobutylstannoïque à la fois pour l'étape d'estérification ou de transestérification et l'étape de suppression de glycols sous vide.
Farachi Fernanda
Foa Marco
Milizia Tiziana
Macrae & Co.
Ministero Dell'universita'e Della Ricerca Scientifica E. Tecnolo
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