C - Chemistry – Metallurgy – 08 – G
Patent
C - Chemistry, Metallurgy
08
G
C08G 63/80 (2006.01) C08G 63/08 (2006.01) C08G 63/78 (2006.01) C08G 63/88 (2006.01)
Patent
CA 2202970
The present invention provides a process for producing absorbable segmented copolymers of aliphatic polyesters with a uniform sequence distribution comprising copolymerizing at least two aliphatic polyester monomers wherein one of the monomers will transesterify under copolymerization conditions to form a segmented block copolymer; then quenching the copolymerization by cooling the segmented block copolymer below the temperature at which transesterification will occur in less than 60 minutes.
La présente invention décrit un procédé pour produire des copolymères segmentés absorbables de polyesters aliphatiques présentant une distribution de séquences uniforme comprenant la copolymérisation d'au moins deux monomères de polyester aliphatique où l'un des monomères sera transestérifié dans les conditions de copolymérisation pour former un copolymère bloc segmenté; suivie du refroidissement, en moins de 60 minutes, du copolymère bloc segmenté sous la température à laquelle la transestérification survient.
Ethicon Inc.
Swabey Ogilvy Renault
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