公开(公告)号：US20160369091A1

公开(公告)日：2016-12-22

申请号：US14901948

申请日：2014-09-24

Applicant: BOREALIS AG

Inventor： Thomas HJERTBERG ,  Ravindra TUPE ,  Undo WAHNER ,  Tanja Piel ,  Yi LIU ,  Romina Alexandra ALBUNIA ,  Floran PRADES ,  Joseph THORMAN ,  Dusan JEREMIC

IPC: C08L23/08

CPC classification number: C08L23/0815 ,  C08F2/001 ,  C08L2205/02 ,  C08L2205/03 ,  C08F210/16 ,  C08F210/14 ,  C08F2500/07 ,  C08F2500/12

Abstract: A process for polymerizing ethylene in the presence of a polymerization catalyst by copolymerizing ethylene with a comonomer selected from the group of C4-C10 alpha-olefins in three polymerization stages. The polymers produced in the three stages have different melt flow rates. The polymer composition produced by the process has good mechanical properties and can be used for making pipes. The process has a good productivity and provides a stable and economic operation.

Abstract translation: 在聚合催化剂存在下，通过在三个聚合阶段使乙烯与选自C 4 -C 10α-烯烃的共聚单体共聚来制备乙烯的方法。 在三个阶段中生产的聚合物具有不同的熔体流动速率。 该方法生产的聚合物组合物具有良好的机械性能，可用于制造管材。 该过程具有良好的生产力，并提供稳定和经济的运作。

公开(公告)号：US20210163638A1

公开(公告)日：2021-06-03

申请号：US16770719

申请日：2018-12-18

Applicant: BOREALIS AG

Inventor： Annika SMEDBERG ,  Emil HJÄRTFORS ,  Villgot ENGLUND ,  Per-Ola HAGSTRAND ,  Bernt-Åke SULTAN ,  Thomas HJERTBERG

IPC: C08F10/02

Abstract: The invention relates to a polyethylene having a melt flow rate at (2.16) kg loading (MFR2), determined according to method ISO1133-1:2011, which MFR2 is A g/10 min and A1≤A≤A2; wherein A1 is (0.5) and A2 is (1.70), and containing a total amount of vinyl groups which is B vinyl groups per (1000) carbon atoms, and B1≤B, wherein B1 is (0.45), determined according to method ASTM D6248-98, a polymer composition, an article being e.g. a cable, e.g. a power cable, and processes for producing a polyethylene, a polymer composition and an article, and an article; useful in different end applications, such as wire and cable (W&C) applications.