发明授权
US06713561B1 Polyethylene moulding compound with an improved ESCR/stiffness relation and an improved swelling rate, a method for the production thereof and the use thereof 有权
具有改善的ESCR /刚度关系和改善的溶胀速率的聚乙烯模塑料,其制备方法及其用途

Polyethylene moulding compound with an improved ESCR/stiffness relation and an improved swelling rate, a method for the production thereof and the use thereof
摘要:
The invention relates to a polyethylene moulding compound having a multimodal molecular weight distribution which has an overall density of ≧0.940 g/cm3 and an MFI190/5 in the range from 0.01 to 10 dg/min. The moulding compound according to the invention comprises an amount of from 30 to 60% by weight of low-molecular-weight ethylene homopolymer A which has a viscosity number VNA in the range from 40 to 150 cm3/g, an amount of from 30 to 65% by weight of high-molecular-weight copolymer B comprising ethylene and a further olefin having from 4 to 10 carbon atoms which has a viscosity number VNB in the range from 150 to 800 cm3/g, and an amount of from 1 to 30% by weight of ultrahigh-molecular-weight ethylene homopolymer C which has a viscosity number VNC in the range from 900 to 3000 cm3/g. The invention also relates to a method for the production of the moulding compound in a three-step process, and to the use thereof for the production of hollow articles.
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