LACTIDE COPOLYMER, METHOD FOR PREPARING SAME, AND RESIN COMPOSITION COMPRISING SAME
    24.
    发明公开
    LACTIDE COPOLYMER, METHOD FOR PREPARING SAME, AND RESIN COMPOSITION COMPRISING SAME 有权
    LACTIDCOPOLYMER,VERFAHREN ZU SEINER HERSTELLUNG UND HARZZUSAMMENSETZUNG DAMIT

    公开(公告)号:EP2719714A2

    公开(公告)日:2014-04-16

    申请号:EP12796320.5

    申请日:2012-06-07

    Applicant: LG Chem, Ltd.

    Abstract: The present invention relates to a lactide copolymer having good flexibility in addition to excellent properties such as mechanical properties and processability and preferably being applicable as a packaging material, a preparation method thereof, and a resin composition including the same. The lactide copolymer includes two or more specific block copolymerized repeating units that the hard segments of polylactide repeating units are connected to both ends of the soft segments of polyether polyol repeating unit, and the block copolymerized repeating units are connected to each other through the intermediation of urethane connecting groups derived from polyvalent isocyanate compound of which the average equivalent of isocyanate group per a molecule is more than 2 and less than 3.

    Abstract translation: 本发明涉及具有良好的柔韧性的丙交酯共聚物,除了具有优异的性能如机械性能和加工性,并且优选适用于包装材料,其制备方法和包含其的树脂组合物。 丙交酯共聚物包括两个或更多个特定的嵌段共聚重复单元,其中聚丙交酯重复单元的硬链段连接到聚醚多元醇重复单元的软链段的两端,并且嵌段共聚重复单元通过以下方式彼此连接: 衍生自多价异氰酸酯化合物的氨基甲酸酯连接基,其每分子的异氰酸酯基平均当量大于2且小于3。

    METHOD FOR PRODUCING POLYLACTIC ACID BLOCK COPOLYMER
    29.
    发明公开
    METHOD FOR PRODUCING POLYLACTIC ACID BLOCK COPOLYMER 有权
    VERFAHREN ZUR HERSTELLUNG VONPOLYMILCHSÄURE-BLOCKCOPOLYMEREN

    公开(公告)号:EP2612877A1

    公开(公告)日:2013-07-10

    申请号:EP11821410.5

    申请日:2011-06-27

    Abstract: A method for producing a polylactic acid block copolymer constituted by a segment(s) composed of L-lactic acid units and a segment(s) composed of D-lactic acid units, the method comprising the steps of:
    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 the Inequality below: Sc = ΔHh / ΔHl + ΔHh × 100 > 60
    (wherein ΔHh represents the heat of fusion of stereocomplex crystals (J/g), and ΔH1 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. By the production method of the present invention, a polylactic acid block copolymer that forms a polylactic acid stereocomplex having a high molecular weight and a high melting point can be obtained.

    Abstract translation: 一种由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,其特征在于,包括以下步骤:将聚 -L-乳酸和聚-D-乳酸,其中重均分子量为6万至300,000,另一个重均分子量为10,000至50,000,该混合物的重均分子量为 不小于90,000,满足以下不等式的立体络合(Sc)度:Sc =“Hh /”Hl +“Hh×100> 60(其中”Hh表示立体络合物晶体的熔化热(J / g) “H1表示单独的聚-L-乳酸晶体和单独的聚-D-乳酸晶体的熔融热(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。 通过本发明的制造方法,可以得到形成高分子量且高熔点的聚乳酸立体络合物的聚乳酸嵌段共聚物。

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