BIODEGRADABLE OPTICALLY ACTIVE POLYMER AND ITS PRODUCTION

PURPOSE:To industrially advantageously produce the subject enzymolytic and hydrolytic new optically active polymer by ring-opening copolymerization between epsilon-caprolactone and an optically active 7-substituted-1,4-dioxepan-5-one. CONSTITUTION:Ring-opening copolymerization between epsilon-caprol...

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Bibliographic Details
Main Authors AKUTAGAWA SUSUMU, HORI YASUSHI, YASUDA HAJIME, SHIRAHAMA HIROYUKI
Format Patent
LanguageEnglish
Published 30.03.1993
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:PURPOSE:To industrially advantageously produce the subject enzymolytic and hydrolytic new optically active polymer by ring-opening copolymerization between epsilon-caprolactone and an optically active 7-substituted-1,4-dioxepan-5-one. CONSTITUTION:Ring-opening copolymerization between epsilon-caprolactone and a compound of formula I (R is 1-5C alkyl) is carried out in the presence of one or more kinds of catalysts selected from (A) an organoaluminum (preferably trialkylaluminum, etc.) and water, (B) an organotin compound (preferably dialkyltin oxide, etc.) and (C) an organolanthanoid compound [complex of formula II (R1 and R2 are H or methyl; Ln is Sc, Y, La, Pr, etc.)] to obtain the objective polymer of formula III ((m) and (n) are natural number).
Bibliography:Application Number: JP19910269089