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公开(公告)号：US20240247099A1
公开(公告)日：2024-07-25
申请号：US18627503
申请日：2024-04-05
发明人： Shunsuke TANAKA , Atsushi KUSUNO , Satoshi KATO
CPC分类号： C08G63/16 , C08G63/83 , C08G63/85 , C08G2230/00
摘要： Provided is a resin containing a polybutylene succinate sebacate, characterized in that a content of an alkali metal is 0.001 mass ppm or more and 6.0 mass ppm or less. According to the present invention, it is possible to provide a polyester resin, a resin composition and a shaped object which achieve both biodegradability in seawater and hydrolysis resistance, which are contradictory properties, at high level.
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公开(公告)号：US20220356301A1
公开(公告)日：2022-11-10
申请号：US17868319
申请日：2022-07-19
发明人： Yutaka YATSUGI , Shunsuke TANAKA
IPC分类号： C08G63/78 , C08G63/183
摘要： Provided is a method for producing an aliphatic-aromatic polyester, such as PBST, by an esterification and/or transesterification reaction and a polycondensation reaction, the method being capable of reducing the insufficiency in the degree of crystallization in the related art and capable of producing an aliphatic-aromatic polyester having a high degree of crystallinity. A method for producing an aliphatic-aromatic polyester, the method including subjecting an aliphatic diol component, an aliphatic dicarboxylic acid component, and an aromatic dicarboxylic acid component that serve as raw materials to an esterification and/or transesterification reaction and a polycondensation reaction subsequent to the esterification and/or transesterification reaction in a presence of a catalyst, wherein, while the aliphatic-aromatic polyester is produced, a nucleating agent that satisfies a condition represented by Formula (1) below is present in a reaction system. 0° C.
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公开(公告)号：US20230140076A1
公开(公告)日：2023-05-04
申请号：US18091448
申请日：2022-12-30
发明人： Kouji YASUI , Shunsuke TANAKA , Yutaka YATSUGI
IPC分类号： C08G63/183 , C08G63/85 , C08J5/18
摘要： An aliphatic-aromatic polyester resin comprising principal structural units that includes aliphatic dicarboxylic acid units, aromatic dicarboxylic acid units, and aliphatic diol units and/or alicyclic diol units, wherein an abundance ratio (molar ratio) between the aliphatic dicarboxylic acid units and the aromatic dicarboxylic acid units is 15:85 to 85:15; the aliphatic-aromatic polyester resin has a glass transition temperature of −25° C. or more; and the aliphatic-aromatic polyester resin has branched structures represented by formulae (1) to (4) below: where Ar1, Ar2, and Ar3 each independently represent an optionally substituted divalent group having 4 to 12 carbon atoms, the optionally substituted divalent group being a divalent aromatic hydrocarbon group or a divalent aromatic heterocyclic group; R represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; and n, m, and r are each independently an integer of 2 to 10.
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