Lg Chem, Ltd

Seung Joon Lim

Se Jeong Kim

Tae Seob Lee

Woo Han Kim

Yoon Bin Lim

Gieun Park

Jae Gu Lim

Ha Neul Kim

Seungil Baek

Eun Seon Lee

Yeongkyu Choi

Myoungseok Cho

The polyamide-imide block copolymer according to the present invention makes it possible to provide a polyamide-imide film having excellent thermal stability and chemical resistance and, at the same time, having excellent mechanical properties.

Polyamide-imide block copolymers, preparation method thereof and polyamide-imide film comprising the same

The present disclosure relates to a poly(amide-imide) copolymer in which each of at least one of imide repeating units and at least one of amide repeating units is substituted with a functional group including Chemical Formula 1, wherein, Ris hydrogen or an alkyl group having 1 to 10 carbon atoms, and L is a single bond or an alkylene having 1 to 10 carbon atoms, and a composition and a polymer film comprising the same.

Poly(amide-imide) copolymer, composition and polymer film comprising thereof

The present disclosure relates to an optical laminate for a flexible display device comprising: a support substrate layer; and a hard coating layer positioned on at least one surface of the support substrate layer and having a thickness of 10 μm to 250 μm, wherein the hard coating layer is a polysiloxane containing 70 mol % or more of a repeating unit including an epoxy group-containing functional group; and an elastomeric polymer including polycaprolactone polyol, and wherein the polysiloxane has a number average molecular weight of more than 3,000 and less than 10,000, and a polydispersity Index (PDI) of 1.0 or more and less than 5.0, and a flexible display device including the same.

Optical laminate and flexible display device including the same

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Daejeon, South Korea

Seung Joon Lim