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US 5,844,067 AGranted
Process for producing absorbable segmented copolymers with a substantially uniform sequence distribution
OwnerModesto Ernetainventor
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Abstract
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.
Claims8
A process for producing absorbable segmented copolymers of aliphatic polyesters with a uniform sequence distribution comprising
- a) copolymerizing at least two aliphatic polyester monomers wherein one of the monomers will transesterify under copolymerization conditions to form a segmented block copolymer;
- then
- b) quenching the copolymerization by cooling the segmented block copolymer below the temperature at which transesterification will occur in less than 60 minutes.
Dependencies are inferred from the claim text.