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
- 专利标题: Polyethylene moulding compound with an improved ESCR/stiffness relation and an improved swelling rate, a method for the production thereof and the use thereof
- 专利标题(中): 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
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申请号: US10088855申请日: 2002-03-21
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公开(公告)号: US06713561B1公开(公告)日: 2004-03-30
- 发明人: Joachim Berthold , Ludwig Böhm , Johannes-Friedrich Enderle , Reinhard Schubbach
- 申请人: Joachim Berthold , Ludwig Böhm , Johannes-Friedrich Enderle , Reinhard Schubbach
- 优先权: DE19945980 19990924
- 主分类号: C08F1002
- IPC分类号: C08F1002
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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