公开(公告)号：US20150031780A1

公开(公告)日：2015-01-29

申请号：US14444419

申请日：2014-07-28

Applicant: LG CHEM, LTD.

Inventor： Bong-Tae KIM ,  Heon-Sik SONG ,  Jung-Ho LIM ,  Kyoung-Min KIM

IPC: C08J9/28 ,  B29C47/00 ,  C08J5/18

CPC classification number: C08J9/28 ,  B29C47/0057 ,  B29K2023/065 ,  B29L2031/3468 ,  C08J5/18 ,  C08J9/283 ,  C08J2201/052 ,  C08J2323/02 ,  C08J2323/06 ,  C08L23/02

Abstract: The present invention discloses a method for preparing a microporous polyolefin film comprising: a step of injecting a composition comprising polyolefin 30 to 60 wt % and a diluent, which can make liquid-liquid phase separation with the polyolefin thermodynamically 40 to 70 wt %, into an extruding machine, and melting and kneading thereof to prepare a single phase melt; and a step of extruding the melt while conducting liquid-liquid phase separation by passing through a section having the temperature below the liquid-liquid phase separation temperature and forming thereof in the form of a sheet, and a microporous polyolefin film prepared according to the method.

Abstract translation: 本发明公开了一种微孔聚烯烃薄膜的制造方法，其特征在于，包括以下步骤：将含有聚烯烃30〜60重量％的组合物和稀释剂进行注入，所述稀释剂能够将聚烯烃与动力学上的液 - 液相分离为40〜70重量％ 挤出机，并将其熔融和捏合以制备单相熔体; 以及通过使液体 - 液相分离温度低于液 - 液相分离温度的部分进行液 - 液相分离而挤出熔融物的步骤，并将其形成为片状，以及根据该方法制备的微孔聚烯烃膜 。

公开(公告)号：US20150018442A1

公开(公告)日：2015-01-15

申请号：US14444530

申请日：2014-07-28

Applicant: LG CHEM, LTD

Inventor： Bong-Tae KIM ,  Heon-Sik SONG ,  Seung-Yup LEE ,  Kyoung-Min KIM

IPC: C08J5/18 ,  B29C47/00

CPC classification number: C08J5/18 ,  B29C47/0071 ,  B29D7/01 ,  B29L2007/008 ,  C08J2201/03 ,  C08J2201/0522 ,  C08J2323/02 ,  C08J2323/06 ,  C08L23/02

Abstract: The present invention discloses a method for preparing a microporous polyolefin film comprising: a step of injecting a composition comprising polyolefin 30 to 60 wt % and a diluent mixture comprising a diluent, which can make liquid-liquid phase separation with the polyolefin thermodynamically 40 to 70 wt %, into an extruding machine, and melting and kneading thereof to prepare a single phase melt; and a step of extruding the melt while conducting liquid-liquid phase separation by passing through a section having the temperature below the liquid-liquid phase separation temperature and forming thereof in the form of a sheet, and a microporous polyolefin film prepared according to the method.

Abstract translation: 本发明公开了一种微孔性聚烯烃膜的制造方法，其特征在于，包括以下步骤：将含有聚烯烃30〜60重量％的组合物和包含稀释剂的稀释剂混合物进行热力学动力学分析， wt％进入挤出机，并将其熔融和捏合以制备单相熔体; 以及通过使液体 - 液相分离温度低于液 - 液相分离温度的部分进行液 - 液相分离而挤出熔融物的步骤，并将其形成为片状，以及根据该方法制备的微孔聚烯烃膜 。

公开(公告)号：US20220263194A1

公开(公告)日：2022-08-18

申请号：US17631292

申请日：2020-07-29

Applicant: LG CHEM, LTD.

Inventor： Joo-Sung LEE ,  Bong-Tae KIM ,  Kil-An JUNG

IPC: H01M50/446 ,  H01M10/0525

Abstract: A composite separator for an electrochemical device, including: a porous polymer substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous polymer substrate. The porous coating layer includes a plurality of particles and a binder positioned on at least a part of the surface of the particles to connect and fix the particles with one another. The particles include at least one of inorganic particles or organic particles, and the composite separator has a melt-down temperature of 170° C. or higher. An electrochemical device including the composite separator is also disclosed.