Lg Chem, Ltd

Dong-Woo Yoo

Sung-Ho Chun

Dai-Seung Choi

Young-Chul Won

Heon Kim

Yu-Chan Kang

Sung-Joon Oh

Hyeong-Bin Jang

Seung-Yeon Hwang

Sung-Kyoung Lee

Jung Hyun Kim

Dai Seung Choi

Kyung Chang Seo

Sung-Don Hong

Bun-Yeoul Lee

Min Hyung Lee

Min-Hyung Lee

Hyeong Bin Jang

Eun Seok Park

Mi Ra Hong

Hye-Young Jung

Mi-Ra Hong

Kyung-Chang Seo

Jeong-Yoon Han

Jung-hyun Kim

Eun-Seok Park

Disclosed therein are a photoalignment polyimide copolymer making it easier to form a liquid crystal alignment layer with excellences in alignment properties, thermal and structural stabilities, and adhesiveness to a substrate, and a liquid crystal alignment layer using the same. The photoalignment polyimide copolymer includes all the three types of repeating units each having a defined structure.

Photoalignment polyimide copolymer and liquid crystal alignment layer

The present description relates to a polymerizable liquid crystal compound, a polymerizable liquid crystal composition including the same, and an optically anisotropic body. The polymerizable liquid crystal compound includes a radical derived from the first liquid crystal molecule including a mesogen group having a non-aromatic ring; a radical derived from the second liquid crystal molecule including a mesogen group that has a structure different from said mesogen group having a non-aromatic ring and includes a ring containing a double bond; and a linker that has a specific structure and links the sp3-hybridized carbon in the non-aromatic ring of the radical derived from the first liquid crystal molecule and the sp2-hybridized carbon in the mesogen group of the radical derived from the second liquid crystal molecule, wherein at least one of the radicals derived from the first and the second liquid crystal molecules may include one or more polymerizable groups which are connected to the mesogen group directly or via spacer groups. Such polymerizable liquid crystal compound makes it possible to exhibit stable reverse wavelength dispersion solely or by being mixed with other liquid crystal materials.

Polymerizable liquid crystal compound, polymerizable liquid crystal composition, and optical anisotropic body

Disclosed herein are an acrylate compound having a photoreactive group, a photoreactive acrylate polymer, and a photo-alignment layer including the same that not only have excellent alignment properties and alignment rate and readiness for change in the alignment direction based on the polarization direction of radiation, but also exhibit a high solubility to organic solvents and good workability.

Acrylate compound having photoreactive group, photoreactive acrylate polymer and photo-alignment layer comprising the same

The present invention relates to a photoalignment layer, for example, a liquid crystal alignment layer, which is able to realize the wide viewing angle and contrast ratio characteristics of a photopolymerizable alignment layer, and to facilitate interaction with the liquid crystal layer, thereby improving alignment stability and reducing image sticking, and a liquid crystal cell including the same. The liquid crystal alignment layer includes a photo-alignment layer including a photo-alignment polymer having at least partially photo-aligned photoreactive groups; and a mesogen layer including a cured product of a reactive mesogen that is liquid crystal-aligned by the photo-aligned photoreactive group, in which the photo-alignment polymer include a norbornene-based polymer having a particular structure.

Liquid crystal alignment layer and liquid crystal cell comprising the same

Disclosed herein is a novel cyclic olefin compound having a photoreactive group and a novel photoreactive polymer. The cyclic olefin compound is applicable to various photoreactions, such as of liquid crystal alignment films and can be preferably used as a precursor of different organic compounds or polymers.

Cyclic olefin compound having photoreactive group and photoreactive polymer

Disclosed herein are a cyclic olefin compound, a photoreactive polymer, and an alignment layer comprising the photoreactive polymer, where the cyclic olefin compound can be used to provide the photoreactive polymer having not only excellences in liquid crystal alignment and alignment rate but also readiness for change in the alignment direction depending on the polarization direction.

Cyclic olefin compound, photoreactive polymer, and alignment layer comprising the same

The present invention relates to a norbornene monomer, a polynorbornene derivative, a liquid crystal alignment film including the same. and a liquid crystal display device including the same. More particularly, the present invention relates to a norbornene monomer, a polynorbornene derivative, a liquid crystal alignment film including the same, and a liquid crystal display device including the same, which have an alignment property by photoreaction, excellent thermal stability and photoreactivity, the increased photo-reaction rate and reliability of the alignment film, thereby showing high manufacturing process efficiency.

Norbornene monomer, polynorbornene derivative, liquid crystal photoalignment film containing the same and liquid crystal display containing the same

Disclosed herein are a photoreactive polymer, and an alignment layer comprising the same that exhibit excellences in alignment rate and alignment stability. The photoreactive polymer comprises a cyclic olefin-based repeating unit with at least one photoreactive substituent, and the maximum absolute value of a variation in dichloric ratio per unit UV dose as given by d(dichloric ratio)/d(mJ/cm) upon exposure to a polarized UV radiation having a wavelength of 150 to 450 nm at a total exposure dose of 20 mJ/cmor less is at least 0.003.

Photoreactive polymer and alignment layer comprising the same

The present invention relates to a norbornene monomer, a polynorbornene derivative, a liquid crystal alignment film including the same, and a liquid crystal display device including the same. More particularly, the present invention relates to a norbornene monomer, a polynorbornene derivative, a liquid crystal alignment film including the same, and a liquid crystal display device including the same, which have an alignment property by photoreaction, excellent thermal stability and photoreactivity, the increased photo-reaction rate and reliability of the alignment film, thereby showing high manufacturing process efficiency.

The present invention relates to a photo-curable composition that can provide a film, etc. showing excellent optical anisotropy even without need for separately forming a liquid crystal layer and an alignment layer, an optical anisotropic film using the same, and its preparation method. The photo-curable composition comprises a photo-alignable polymer, a noncrosslinkable liquid crystal compound and a photo-curable binder.

Photo-curable composition, optical anistropic film and its preparation method

The present invention relates to an esterification catalyst composition that includes a zirconium compound and a method for producing an ester compound, which includes the steps of esterifying alcohol and carboxylic acid compounds by using the same, and it may be applied to a mass synthesis process.

Catalyst composition including zirconium compounds for esterfication reaction and method for preparing ester compounds

The present invention relates to a specific photoreactive polymer that shows excellent alignment stability and thermal stability together with excellent liquid crystal alignment, thereby being desirably used in an alignment film of a liquid crystal display device, a compound having a photoreactive functional group that is used as a monomer for the preparation of the photoreactive polymer, and an alignment film.

Compound having photoreactive functional group, photoreactive polymer, and alignment film comprising the same

The present invention relates to a novel metallocene compound, a catalyst composition including the compound and an olefin polymer prepared using the same. The metallocene compound and the catalyst composition can be used for preparing the olefin polymer with high copolymerization degree and high molecular weight. Particularly, the block copolymer with high heat resistance can be prepared by using the metallocene compound, and the olefin polymer with high melting point (Tm) can be obtained, even if co-monomer is used at an increased amount in preparation of olefin polymer.

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Daejeon, South Korea

Dong-Woo Yoo