METHOD FOR PRODUCING WATER-DISINTEGRATABLE BLOCK COPOLYMER AND WATER-DISINTEGRATABLE BLOCK COPOLYMER OBTAINED BY THE METHOD

PROBLEM TO BE SOLVED: To provide a method for producing a block copolymer usable as a novel plastic material having a rapid decomposability in a large amount of water (water disintegratability) while maintaining a certain form in the air and absorbing a certain amount of moisture content. SOLUTION:...

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Bibliographic Details
Main Authors OBATA ATSUO, MITSUZUKA MASAHIKO, OTANI RIEKO, WATANABE AKITO, TSURUTA MANABU, OOKUBO HIDEKAZU
Format Patent
LanguageEnglish
Published 24.04.2008
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Summary:PROBLEM TO BE SOLVED: To provide a method for producing a block copolymer usable as a novel plastic material having a rapid decomposability in a large amount of water (water disintegratability) while maintaining a certain form in the air and absorbing a certain amount of moisture content. SOLUTION: A method for producing a water-disintegratable block copolymer comprising a step of reacting (a): (a1) a polyalkylene glycol and/or (a2) an aliphatic polyester having a hydroxy group at both ends obtained by esterification of a polyalkylene glycol and an aliphatic dicarboxylic acid or its anhydride, (b) an aliphatic polyester having a hydroxy group at both ends not including a polyoxyalkylene group, and (c) a chain extending agent having a plurality of functional groups to react with a hydroxy group is provided. COPYRIGHT: (C)2008,JPO&INPIT
Bibliography:Application Number: JP20070238051