Process for the Production of Polymeric Compositions Useful as Oil Modifiers
    2.
    发明申请
    Process for the Production of Polymeric Compositions Useful as Oil Modifiers 有权
    用作油改性剂的聚合组合物的生产方法

    公开(公告)号:US20130203641A1

    公开(公告)日:2013-08-08

    申请号:US13365698

    申请日:2012-02-03

    IPC分类号: C10M143/00

    摘要: Provided are processes for making polymer compositions, especially those with reduced or no gel formation in lubricating oils as identified by rheological and visual gel tests and which are useful as viscosity modifiers. The processes described herein aim to achieve this objective by adjusting the concentrations of the hydrogen feed(s) in the first and/or second polymerization reaction zones, preferably such that (a) the hydrogen feed concentration in the first polymerization reaction zone is 0.0-1.0 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, α-olefin comonomer, and solvent into the first polymerization reaction zone, and/or (b) the hydrogen feed concentration in the second polymerization reaction zone is 0.0-0.5 wt %, based on total weight of feed(s) of hydrogen, ethylene monomer, α-olefin comonomer, and solvent into the second polymerization reaction zone.

    摘要翻译: 提供了制备聚合物组合物的方法,特别是通过流变学和视觉凝胶测试鉴定的润滑油中形成凝胶或没有凝胶的那些,并且它们可用作粘度调节剂。 本文所述的方法旨在通过调节第一和/或第二聚合反应区中的氢气进料的浓度来实现该目的,优选使得(a)第一聚合反应区中的氢气进料浓度为0.0- 1.0重量%,基于氢,乙烯单体,α-烯烃共聚单体和溶剂的进料的总重量进入第一聚合反应区,和/或(b)第二聚合反应区中的氢气进料浓度为 0.0-5.5重量%,基于氢,乙烯单体,α-烯烃共聚单体和溶剂的进料的总重量进入第二聚合反应区。

    Methods of Controlling Polymer Properties
    5.
    发明申请
    Methods of Controlling Polymer Properties 有权
    控制聚合物性能的方法

    公开(公告)号:US20120041164A1

    公开(公告)日:2012-02-16

    申请号:US13276693

    申请日:2011-10-19

    IPC分类号: C08F230/04

    摘要: The invention generally provides for methods for controlling polymer properties. In particular, invention provides for methods for controlling the comonomer composition distribution of polyolefins such as ethylene alpha-olefin copolymers by altering at least one or more of the following parameters: the molar ratio of hydrogen to ethylene, the molar ratio of comonomer to ethylene, the partial pressure of ethylene, and the reactor temperature without substantially changing the density and/or the melt index of the copolymer.

    摘要翻译: 本发明通常提供了控制聚合物性质的方法。 特别地,本发明提供了通过改变至少一个或多个以下参数来控制聚烯烃如乙烯α-烯烃共聚物的共聚单体组成分布的方法:氢与乙烯的摩尔比,共聚单体与乙烯的摩尔比, 乙烯的分压和反应器温度,而基本上不改变共聚物的密度和/或熔体指数。