利索-全球专利检索

  1. 登录
  2. 注册
发明授权
CN101970565B 具有改进的均匀度和气味的聚合物组合物及其制造方法和由其制成的管 有权

具有改进的均匀度和气味的聚合物组合物及其制造方法和由其制成的管
摘要：
本发明涉及一种适合于制造管的聚合物组合物。所述组合物包含由乙烯与一种或多种具有4-10个碳原子的α-烯烃形成的多峰共聚物，其中，所述多峰乙烯共聚物的密度为924-960kg/m3，熔融指数MFR5为0.5-6.0g/10min，熔融指数MFR2为0.1-2.0g/10min并且剪切变稀指数SHI2.7/210为2-50。所述组合物还含有以重量计最多100ppm的挥发性化合物和/或具有最高为3的均匀度等级。另外，所述多峰共聚物包含：(A)以重量计基于组分(A)和(B)的总量的35-60％的低分子量乙烯聚合物，选自乙烯均聚物和由乙烯和一种或多种具有4-10个碳原子的α-烯烃形成的共聚物，重均分子量为5000-100000g/mol以及密度为945-975kg/m3；和(B)以重量计基于组分(A)和(B)的总量的40-65％的由乙烯和一种或多种具有4-10个碳原子的α-烯烃形成的高分子量共聚物，重均分子量为100000-1000000g/mol以及密度为890-935kg/m3。
摘要（英）：

The present invention deals with polymer compositions suitable for making pipes. The compositions comprise a multimodal copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms wherein the multimodal ethylene copolymer has a density of from 924 to 960 kg/m3, a melt index MFR5 of from 0.5 to 6.0 g/10 min, a melt index MFR2 of from 0.1 to 2.0 g/10 min and a shear thinning index SHI27/210 of from 2 to 50. The compositions further have a level of volatile compounds of at most 100 ppm by weight and/or a homogeneity rating of at most 3. In addition the multimodal copolymer comprises: (A) from 35 to 60 % by weight, based on the combined amount of components (A) and (B), of a low molecular weight ethylene polymer selected from ethylene homopolymer and a copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms and having a weight average molecular weight of from 5000 to 100000 g/mol and a density of from 945 to 975 kg/m3; and (B) from 40 to 65 % by weight, based on the combined amount of components (A) and (B), of a high molecular weight copolymer of ethylene and one or more alpha-olefins having from 4 to 10 carbon atoms and having a weight average molecular weight of from 100000 to 1000000 g/mol and a density of from 890 to 935 kg/m3.

公开/授权文献
0/0