Lg Chem, Ltd

Toray Industries, Inc.

Lg Energy Solution, Ltd.

Jung-A Yoo

Chang-Hun Han

Song-Taek Oh

Byoung-Il Kang

Sang-Young Lee

Jang-Hyuk Hong

Jong-Hyeok Park

Sang-Seop Kim

Moon-Ja Nam

The present invention relates to an optical film and method of manufacturing the same. The optical film of the present invention includes an acrylic resin and a core-shell type graft copolymer wherein the core includes a conjugate diene rubber, and the shell includes an acrylic monomer, an aromatic vinyl monomer, and a maleimide monomer.

Optical film and method of preparing same

An organic/inorganic composite separator includes a porous substrate having a plurality of pores; and a porous coating layer formed on at least one surface of the porous substrate with a plurality of inorganic particles and a binder polymer. The binder polymer is a copolymer including: (a) a first monomer unit having a contact angle to a water drop in the range from 0&#xb0; to 49&#xb0;; and (b) a second monomer unit having a contact angle to a water drop in the range from 50&#xb0; to 130&#xb0;. This organic/inorganic composite separator has excellent thermal stability, so it may restrain an electric short circuit between a cathode and an anode. In addition, the separator may prevent inorganic particles in the porous coating layer from being extracted during an assembling process of an electrochemical device, thereby improving stability of an electrochemical device.

Organic/inorganic composite separator and electrochemical device containing the same

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Daejeon, South Korea

Jung-A Yoo