会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Process to produce a homogeneous polyethylene material
    • 生产均质聚乙烯材料的方法
    • US06642323B1
    • 2003-11-04
    • US09674912
    • 2000-11-08
    • Ole Jan MyhreBjarne JansenAuli Nummila-PakarinenJari Äärilä
    • Ole Jan MyhreBjarne JansenAuli Nummila-PakarinenJari Äärilä
    • C08F234
    • C08F10/00C08F10/02C08F110/02C08L23/06C08L2205/02Y10S526/901Y10S526/905C08F4/651C08F4/6555C08F2/001C08L2666/04C08F2500/12C08F2500/18C08F2500/19C08F2500/02C08F2500/01
    • The present invention concerns a process for producing homogeneous polyethylene compositions and processes for making high density, medium density and low density films therefrom. The process comprises carrying out the polymerization in the presence of an ethylene-polymerizing catalyst system in a multistage reaction sequence of successive polymerization stages, at least one of which is a loop polymerization stage, and at least one of which is a gas phase polymerization stage. According to the invention, said loop polymerization stage is operated using a diluent selected from the group of linear and branched C4-C6 hydrocarbons and/or mixtures thereof. The reactor sequence is operated with different amounts of hydrogen and comonomers to produce a high molecular weight portion in one of the polymerization stages and a low molecular weight portion in another, so as to provide bimodal polyethylene composition with a low molecular weight part having an MFR2 of 250 g/10 min or more. The obtained material is homogenous and the fines level in the process is low.
    • 本发明涉及用于制备均匀的聚乙烯组合物的方法和从其制备高密度,中密度和低密度的薄膜的方法。 该方法包括在乙烯聚合催化剂体系的存在下,在连续聚合阶段的多阶段反应顺序中进行聚合,其中至少一个是环聚合阶段,并且其中至少一个是气相聚合反应阶段 。 根据本发明,所述环路聚合阶段使用选自直链​​和支链C 4 -C 6烃和/或其混合物的稀释剂进行操作。 反应器序列用不同量的氢和共聚单体操作以在聚合阶段之一和另一个聚合阶段中的低分子量部分产生高分子量部分,以便提供具有MFR 2的低分子量部分的双峰聚乙烯组合物 为250g / 10min以上。 获得的材料是均匀的,并且该方法中的细粉水平低。