BLOCK COPOLYMER AND METHOD FOR PRODUCING THE SAME

To provide a silicone-based block copolymer which achieves high toughness in addition to low elastic modulus of a resin cured product when mixed with an epoxy resin and to provide a method for producing the same.SOLUTION: There are provided: a block copolymer containing [A] a block composed of polys...

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Bibliographic Details
Main Authors ASANO ITARU, WATANABE KOTA
Format Patent
LanguageEnglish
Japanese
Published 07.04.2023
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Summary:To provide a silicone-based block copolymer which achieves high toughness in addition to low elastic modulus of a resin cured product when mixed with an epoxy resin and to provide a method for producing the same.SOLUTION: There are provided: a block copolymer containing [A] a block composed of polysiloxane, [B] a block composed of polyalkylene glycol and [C] a linkage segment, wherein the linkage segment [C] has an epoxy group and contains an ester bond and/or an amide bond and the block copolymer has an epoxy group content of 0.1 to 3.0 mmol/mg and a weight average molecular weight of 5000 to 500000; and a method for producing the same.SELECTED DRAWING: None 【課題】エポキシ樹脂と混合した際に樹脂硬化物の低弾性率化に加えて高靭性化も実現するシリコーン系ブロック共重合体およびその製造方法を提供する【解決手段】ポリシロキサンから構成されるブロック[A]、ポリアルキレングリコールから構成されるブロック[B]、および連結セグメント[C]を含むブロック共重合体であって、連結セグメント[C]はエポキシ基を有しかつエステル結合および/またはアミド結合を含み、ブロック共重合体のエポキシ基含有量が0.1~3.0mmol/gであり、かつ、重量平均分子量が5,000~500,000であるブロック共重合体およびその製造方法。【選択図】なし
Bibliography:Application Number: JP20210157376