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    METHOD FOR PRODUCING POLYLACTIC ACID BLOCK COPOLYMER
    2.
    发明申请
    METHOD FOR PRODUCING POLYLACTIC ACID BLOCK COPOLYMER 有权
    制备聚酸嵌段共聚物的方法

    公开(公告)号：US20130158209A1

    公开(公告)日：2013-06-20

    申请号：US13819199

    申请日：2011-06-27

    申请人： Yoshitake Takahashi ,  Takuma Naotsuka ,  Ken Sudo ,  Hiroyuki Ome

    发明人： Yoshitake Takahashi ,  Takuma Naotsuka ,  Ken Sudo ,  Hiroyuki Ome

    IPC分类号： C08G63/80

    CPC分类号： C08G63/80 ,  C08G63/06 ,  C08G63/08 ,  C08G63/823 ,  C08G63/912 ,  C08G2261/126 ,  C08L67/04 ,  C08L2205/025 ,  C08L2205/05

    摘要： A method of producing a polylactic acid block copolymer constituted of a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, includes obtaining a mixture by mixing poly-L-lactic acid and poly-D-lactic acid one of which has a weight average molecular weight of 60,000 to 300,000 and the other of which has a weight average molecular weight of 10,000 to 50,000, the mixture having a weight average molecular weight of not less than 90,000 and a degree of stereocomplexation (Sc) satisfying: Sc=ΔHh/(ΔHl+ΔHh)×100>60 (wherein ΔHh represents the heat of fusion of stereocomplex crystals (J/g), and ΔHl represents the heat of fusion of crystals of poly-L-lactic acid alone and crystals of poly-D-lactic acid alone (J/g)); and subsequently subjecting the mixture to solid-phase polymerization at a temperature lower than the melting point of the mixture.

    摘要翻译： 由L-乳酸单元构成的链段和由D-乳酸单元构成的链段构成的聚乳酸嵌段共聚物的制造方法包括：将聚-L-乳酸和 聚D-乳酸的重均分子量为60000〜300000，另一个重均分子量为10,000〜50,000，该重均分子量不小于90,000， 立方复合度（Sc）满足：Sc = DeltaHh /（DeltaH1 +ΔHh）×100> 60（其中DeltaHh表示立体络合物晶体的熔化热（J / g），ΔH1表示聚 - 单独使用L-乳酸和单独的聚-D-乳酸晶体（J / g））; 然后在比混合物的熔点低的温度下使混合物进行固相聚合。

    Method for producing polylactic acid block copolymer
    4.
    发明授权
    Method for producing polylactic acid block copolymer 有权
    聚乳酸嵌段共聚物的制备方法

    公开(公告)号：US09150690B2

    公开(公告)日：2015-10-06

    申请号：US13819199

    申请日：2011-06-27

    申请人： Yoshitake Takahashi ,  Takuma Naotsuka ,  Ken Sudo ,  Hiroyuki Ome

    发明人： Yoshitake Takahashi ,  Takuma Naotsuka ,  Ken Sudo ,  Hiroyuki Ome

    IPC分类号： C08G63/80 ,  C08L67/04 ,  C08G63/06 ,  C08G63/82 ,  C08G63/08 ,  C08G63/91

    CPC分类号： C08G63/80 ,  C08G63/06 ,  C08G63/08 ,  C08G63/823 ,  C08G63/912 ,  C08G2261/126 ,  C08L67/04 ,  C08L2205/025 ,  C08L2205/05

    摘要： A method of producing a polylactic acid block copolymer constituted of a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, includes obtaining a mixture by mixing poly-L-lactic acid and poly-D-lactic acid one of which has a weight average molecular weight of 60,000 to 300,000 and the other of which has a weight average molecular weight of 10,000 to 50,000, the mixture having a weight average molecular weight of not less than 90,000 and a degree of stereocomplexation (Sc) satisfying: Sc=ΔHh/(ΔHl+ΔHh)×100>60 (wherein ΔHh represents the heat of fusion of stereocomplex crystals (J/g), and ΔHl represents the heat of fusion of crystals of poly-L-lactic acid alone and crystals of poly-D-lactic acid alone (J/g)); and subsequently subjecting the mixture to solid-phase polymerization at a temperature lower than the melting point of the mixture.

    摘要翻译： 由L-乳酸单元构成的链段和由D-乳酸单元构成的链段构成的聚乳酸嵌段共聚物的制造方法包括：将聚-L-乳酸和 聚D-乳酸的重均分子量为60000〜300000，另一个重均分子量为10,000〜50,000，该重均分子量不小于90,000， 满足：Sc =＆Dgr; Hh /（＆Dgr; Hl +＆Dgr; Hh）×100> 60（其中＆Dgr; Hh表示立体络合物晶体的熔融热（J / g）和＆Dgr; H1 表示单独的聚-L-乳酸晶体和单独的聚-D-乳酸晶体的熔合热（J / g））; 然后在比混合物的熔点低的温度下使混合物进行固相聚合。

    POLYLACTIC ACID RESIN COMPOSITION, PRODUCTION METHOD THEREOF AND MOLDED PRODUCT THEREOF
    5.
    发明申请
    POLYLACTIC ACID RESIN COMPOSITION, PRODUCTION METHOD THEREOF AND MOLDED PRODUCT THEREOF 审中-公开
    聚酸树脂组合物及其生产方法及其成型品

    公开(公告)号：US20140206807A1

    公开(公告)日：2014-07-24

    申请号：US14238877

    申请日：2012-08-24

    申请人： Ken Sudo ,  Yoshitake Takahashi ,  Sadanori Kumazawa

    发明人： Ken Sudo ,  Yoshitake Takahashi ,  Sadanori Kumazawa

    IPC分类号： C08L67/04

    CPC分类号： C08L67/04 ,  C08K5/0083 ,  C08K5/521 ,  C08L101/16 ,  C08L2205/02

    摘要： A polylactic acid resin composition includes 0.15 to 0.90 parts by weight of an organic nucleating agent (B) in addition to 100 parts by weight of a polylactic acid resin (A) comprised of a poly-L-lactic acid component and a poly-D-lactic acid component. The polylactic acid resin composition satisfies (i) to (v): (i) amount of a linear oligomer of L-lactic acid and/or D-lactic acid is equal to or less than 0.3 parts by weight; (ii) rate of weight-average molecular weight retention is equal to or greater than 70% after the polylactic acid resin composition is retained in a closed state at 220° C. for 30 minutes; (iii) degree of stereocomplexation (Sc) exceeds 80%; (iv) stereocomplex crystal melting heat quantity ΔHmsc is equal to or greater than 30 J/g; and (v) cooling crystallization heat quantity (ΔHc) is equal to or greater than 20 J/g.

    摘要翻译： 聚乳酸树脂组合物除了含有聚L-乳酸组分和聚-D-乳酸组分的聚乳酸树脂（A）100重量份外还包含0.15至0.90重量份的有机成核剂（B） - 乳酸组分。 聚乳酸树脂组合物满足（i）〜（v）：（i）L-乳酸和/或D-乳酸的线型低聚物的量等于或小于0.3重量份; （ii）在220℃下将聚乳酸树脂组合物保持在闭合状态30分钟后，重均分子量保持率为70％以上; （iii）立构复合度（Sc）超过80％; （iv）立构络合物晶体熔融热量Dgr; Hmsc等于或大于30J / g; 和（v）冷却结晶热量（＆Dgr; Hc）等于或大于20J / g。