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    METHOD FOR PRODUCING EXPANDABLE GRANULATES CONTAINING POLYLACTIC ACID
    14.
    发明申请
    METHOD FOR PRODUCING EXPANDABLE GRANULATES CONTAINING POLYLACTIC ACID 审中-公开
    生产可膨胀含聚丙烯酸颗粒的方法

    公开(公告)号：WO2011086030A2

    公开(公告)日：2011-07-21

    申请号：PCT/EP2011050129

    申请日：2011-01-06

    Applicant: BASF SE ,  FUESL ANDREAS ,  SAMPATH BANGARU ,  HOFMANN MAXIMILIAN ,  BELLIN INGO ,  NALAWADE SAMEER ,  HAHN KLAUS ,  KUENKEL ANDREAS ,  LOOS ROBERT

    Inventor： FUESL ANDREAS ,  SAMPATH BANGARU ,  HOFMANN MAXIMILIAN ,  BELLIN INGO ,  NALAWADE SAMEER ,  HAHN KLAUS ,  KUENKEL ANDREAS ,  LOOS ROBERT

    IPC: C08L67/04 ,  C08J9/16

    CPC classification number: C08J9/127 ,  C08J9/0061 ,  C08J9/16 ,  C08J9/18 ,  C08J2333/14 ,  C08J2367/02 ,  C08J2367/04 ,  C08J2463/00 ,  C08J2467/02 ,  C08L33/068 ,  C08L67/02 ,  C08L67/04 ,  C08L2666/02

    Abstract: The invention relates to a method for producing expandable granulates containing polylactic acid, comprising the following steps: a) melting and mixing the constituents i) between 50 and 99.9 wt. %, relative to the total weight of constituents i) to iii), of polylactic acid, ii) between 0 and 49.9 wt. %, relative to the total weight of constituents i) to iii), of at least one other polymer, iii) between 0.1 and 2 wt. %, relative to the total weight of constituents i) to iii), of a diepoxide or polyepoxide, and iv) between 0 and 10 wt. % of at least one additive, b) mixing v) between 3 and 7 wt. %, relative to the total weight of constituents i) to iv), of an organic blowing agent, into the melted polymer mass, by means of a static or dynamic mixer, at a temperature of at least 40°C, c) discharging the mixture via a nozzle plate with boreholes having a maximum on the nozzle outlet diameter of 1.5 mm, and d) granulating the melted mass containing the blowing agent directly behind the nozzle plate, under water, at a pressure of between 1 and 20 bar. The invention also relates to expandable granulates containing polylactic acid, that can be obtained according to said method, and to special expandable granulates containing polylactic acid, and between 3 and 7 wt. % of an organic blowing agent, preferably n-pentane, and especially preferably iso-pentane. The invention also relates to a preferred method for producing expandable granulates containing polylactic acid and a blowing agent, with a low bulk density.

    Abstract translation: 本发明涉及一种用于制备可膨胀含聚乳酸的颗粒的方法，包括步骤：a）熔化并混合各组分ⅰ）50〜99.9重量％，基于组分的总重量，I至III），聚乳酸二 ）0至49.9重量％，基于组分的总重量，i至iii）中，一种或多种其它聚合物，ⅲ）从0.1至2重量％，基于组分的总重量，i至iii）中， 二环氧化物或聚环氧化物和iv）0至10重量％的一种或多种添加剂％，b）将v）的3至7重量％，基于组分的总重量的I至IV）有机发泡剂到聚合物熔体借助于 在至少40℃的温度下的静态或动态混合器，c）通过用造粒孔，其直径在模出口至多1.5毫米，和d）的模板排出吹直接熔融超过管芯板未剂含有 在1到20巴范围内的压力下进行。 此外，本发明涉及通过该方法和特殊可膨胀含聚乳酸的颗粒与3〜7重量的有机发泡剂的重量％，优选正戊烷和更优选异戊烷的比例获得的可膨胀的含聚乳酸的颗粒。 此外，本发明涉及制备具有低堆积密度的含推进剂的可膨胀聚乳酸颗粒的优选方法。

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