公开(公告)号：US20130345327A1

公开(公告)日：2013-12-26

申请号：US13926252

申请日：2013-06-25

申请人： BASF SE

发明人： Jerome Lohmann ,  Bangaru Dharmapuri Sriramulu Sampath ,  Peter Gutmann ,  Andreas Künkel ,  Klaus Hahn ,  Andreas FüßI

IPC分类号： C08J9/16

CPC分类号： C08J9/16 ,  C08J2367/04 ,  C08J2467/00

摘要： The invention relates to a process for producing expandable pelletized material which comprises polylactic acid which comprises the following steps: a) melting and incorporation by mixing of the following components: i) from 61.9 to 98.9% by weight, based on the total weight of components i to iv, of polylactic acid, ii) from 1 to 38% by weight, based on the total weight of components i to iv, of at least one polyhydroxyalkanoate, iii) from 0 to 30% by weight, based on the total weight of components i to iv, of at least one polyester based on aliphatic and/or aromatic dicarboxylic acids and on aliphatic dihydroxy compounds; iv) from 0.1 to 2% by weight, based on the total weight of components i to iv, of a copolymer which comprises epoxy groups and which is based on styrene, acrylate, and/or methacrylate, and v) from 0 to 10% by weight, based on the total weight of components i to v, of one or more additives, b) incorporation by mixing of vi) from 3 to 7% by weight, based on the components i to v) of an organic blowing agent into the polymer melt by means of a static or dynamic mixer at a temperature of at least 140° C., c) discharging through a die plate with holes, the diameter of which at the exit from the die is at most 1.5 mm, and d) pelletizing the melt comprising blowing agent directly downstream of the die plate, and under water, at a pressure in the range from 1 to 30 bar.

摘要翻译： 本发明涉及一种生产可膨胀颗粒材料的方法，该方法包括聚乳酸，其包括以下步骤：a）通过混合以下组分熔融和掺入：i）基于组分的总重量计，61.9至98.9重量％ i至iv，聚乳酸，ii）基于组分i至iv的至少一种聚羟基链烷酸酯的总重量为1至38重量％，iii）0至30重量％，基于总重量 的组分i至iv，至少一种基于脂族和/或芳族二羧酸的聚酯和脂族二羟基化合物; iv）基于组分i至iv的包含环氧基并且基于苯乙烯，丙烯酸酯和/或甲基丙烯酸酯的共聚物的总重量的0.1至2重量％，和v）0至10重量％ 基于组分i至v的一种或多种添加剂的总重量，b）通过将vi）3至7重量％的混合，基于有机发泡剂的组分i至v）掺入到 聚合物通过静态或动态混合器在至少140℃的温度下熔融，c）通过具有孔的模板排出，其中在模具出口处的直径为至多1.5mm，d ）将包含发泡剂的熔体直接在模板的下游和在水下，在1至30巴的压力下造粒。