Described are polypropylene compositions which are particularly suitable for the preparation of foamed articles and which comprise a mixture of
a) 3 to 75% by weight of crosslinked polypropylene
b) 97 to 25% by weight of not crosslinked polypropylene having an intrinsic viscosity of from 0.5 to 1.3 dl/g;
which is characterized by a M.I. (230°C, 2.16 kg) of from 0.001 to 600 kg/10' and a dispersion of the crosslinked polypropylene in the not crosslinked polypropylene in the form of gels.
Also disclosed is a process for the preparation of the above compositions.
所描述的聚
丙烯组合物特别适用于制备发泡物品,它由以下混合物组成
a) 3%至 75%(按重量计)的交联聚
丙烯
b) 97%至 25%(按重量计)的非交联聚
丙烯,其固有粘度为 0.5 至 1.3 dl/g;
其特点是熔融指数(230℃,2.16 千克)为 0.001 至 600 千克/10',交联聚
丙烯以凝胶形式分散在非交联聚
丙烯中。
还公开了制备上述组合物的工艺。