Lg Chem, Ltd

Industry-university Cooperation Foundation Hanyang University

Hee-Jung Kim

Dong-Ryul Kim

Boong-Goon Jeong

Sang-Uk Ryu

Ju-Eun Cha

Dae-Woo Nam

You-Jin Kyung

Kwang-Joo Lee

Ho-Jun Lee

Hyo-Sun Lee

Young-Whan Park

Gi-Cheul Kim

Myeong-Geun Ko

Jung-Hak Kim

Seung-Lac Ma

Jang-Yeon Hwang

Hyeon Sik Choi

Heon-Sik Song

Sang-hyun Park

Jae-Min Lee

Joo-Eun Ko

Byung-Nam Kim

Min-Jeong Lee

Sang-Hyun Park

The present invention relates to an optical film that comprises a block copolymer that comprises a vinyl polymer block containing styrene or a derivative thereof, and a poly-dimethylsiloxane block, a retardation film using the same, a method of manufacturing them, and a liquid crystal display comprising the films.

Optical films, retardation films, and liquid crystal display comprising the same

The present invention relates to a novel polyamic acid introduced with an imidazolyl group in the polymer chain, a photosensitive resin composition including the polyamic acid and that is capable of providing a photosensitive material that satisfies the characteristics of an excellent bending property and low stiffness and also exhibits excellent heat resistance and coating resistance, a dry film obtained from the photosensitive resin composition, and a circuit board including the dry film.

Poly-amic acid, photo-sensitive resin composition, dry film, and circuit board

The present invention relates to a primer coating composition, an optical film including the same, and a polarizing plate including the same, the primer coating composition according to the present invention includes 1) a polyvinyl alcohol compound including the acetoacetyl group; 2) an acrylate compound that includes at least two vinyl groups; and 3) a basic catalyst, and an optical film that includes a primer layer formed from the primer coating composition has excellent transparency, optical property, mechanical strength, and attaching property to the polyvinyl alcohol polarizer.

Composition for primer coating, optical film comprising the same, and polarizing plate comprising the same

The present invention relates to an optical film that includes a graft copolymer that includes two types or more of (meth)acryl based resins that have different glass transition temperatures, a retardation film, a method of producing the same, and a polarizing plate and a liquid crystal display device that include the optical film or the retardation film.

Optical films, phase difference films, and LCD comprising the same

The present invention relates to novel polyamic acid; a photosensitive resin composition satisfying excellent flexibility and low stiffness and exhibiting excellent heat resistance and plating resistance; a dry film obtained from the photosensitive resin composition; and a circuit board including the dry film.

Polyamic acid, photosensitive resin composition, dry film and circuit board

Disclosed is a negative C-type retardation compensator for a liquid crystal display. The negative C-type retardation compensator for the liquid crystal display includes polyarlate having a thio group or a sulfur oxide group in a polymer main chain thereof. Accordingly, the retardation compensator has an absolute value of negative retardation that is larger in a thickness direction that a retardation compensator which includes polyarylate having no thio group or sulfur oxide group in a polymer main chain thereof even though the retardation compensator having the thio group or sulfur oxide group and the retardation compensator having no thio group or sulfur oxide group are the same as each other in thickness. Thereby, the negative C-type retardation compensator for liquid crystal displays is capable of being desirably applied to the liquid crystal displays.

Retardation compensators of negative C-type for liquid crystal display

The present invention provides a composite material comprising a glass cloth; and an organic-inorganic hybrid composition comprising diphenylsilanediol and alkoxy silane, a composite film manufactured by using the same, and a method for manufacturing the composite film.

Composite materials, composite film manufactured by using the same and method for manufacturing composite film

Disclosed is a negative C-type retardation compensator for a liquid crystal display. The negative C-type retardation compensator for the liquid crystal display includes polyarylate having a thio group or a sulfur oxide group in a polymer main chain thereof. Accordingly, the retardation compensator has an absolute value of negative retardation that is larger in a thickness direction than a retardation compensator which includes polyarylate having no thio group or sulfur oxide group in a polymer main chain thereof even though the retardation compensator having the thio group or sulfur oxide group and the retardation compensator having no thio group or sulfur oxide group are the same as each other in thickness. Thereby, the negative C-type retardation compensator for liquid crystal displays is capable of being desirably applied to the liquid crystal displays.

The present invention provides a composite material comprising a glass cloth; and an organic-inorganic hybrid composition comprising diphenylsilanediol and alkoxy si lane, a composite film manufactured by using the same, and a method for manufacturing the composite film.

The present invention relates to a photosensitive resin composition which is developable with an alkaline aqueous solution and does not need a high temperature for curing and the like, and has all the properties suitable for use in a cover film of a printed circuit board or a laminated body for a semiconductor, and a dry film comprising the same. The photosensitive resin composition comprises (A) a polyamic acid comprising a polymer of at least one diamine compound and at least one acid dianhydride; (B) a photopolymerizable compound having at least one polymerizable ethylenic unsaturated bond in its molecule; and (C) a photoinitiator.

Photosensitive resin composition and dry film comprising the same

The present invention provides a photosensitive resin composition comprising: a polyamic acid including a specific repeating unit; a heterocyclic amine compound; a (metha)acrylate-based compound including one or more double bonds between carbons; a photoinitiator; and an organic solvent, and a dry film prepared therefrom. The photosensitive resin composition can be cured at a low temperature to offer process safety and work convenience, and has excellent bending resistance, soldering heat resistance, and a property of filling the pattern, as well as excellent heat resistance and mechanical properties.

Low temperature curable photosensitive resin composition and dry film manufactured by using the same

The present invention relates to a composition for forming a gate insulating layer of an organic thin film transistor comprising polyarylate, and an organic thin film transistor comprising a gate insulating layer, which is formed using the composition, in contact with an organic semiconductor channel.

Composition for forming gate insulating layer of organic thin-film transistor and organic thin film transistor using the same

The present invention relates to a process for preparing polyarylate, and more specifically, to a process for preparing polyarylate by interfacial polymerization of a bivalent phenol compound and an aromatic dicarboxylic acid or a halide thereof, which comprises mixing a cationic catalyst for the phase transition and a nonionic surfactant in a predetermined ratio, to further increase the yield of polyarylate, as compared with the case of using each of the nonionic surfactant and the cationic catalyst for the phase transition alone.

Process for preparing polyarylate

A process for preparing polyarylate wherein a bivalent phenol compound having the structure of Formula 1 and an aromatic dicarboxylic acid halogen compound react to prepare a polyarylate, and wherein a nonionic surface-active agent is added. This decreases residual salts and improves the transmittance and the heat-resistance. In Formula 1, R1, R2, R3 and R4 denote the same as illustrated in the description. 

Process for preparing polyarylate having high thermo-resistance and high transparency

The present invention relates to an organic-inorganic nanocomposite and preparation thereof and particularly to a method for preparing an organic-inorganic nanocomposite capable of uniformly dispersing a silicate compound in a polymer medium by adding monomers, an initiator, and an emulsifier to an ion-exchanged layered silicate salt that is prepared by adding a cationic initiator and a cationic chain transfer agent to a layered silicate compound to cause polymerization.

Growing community of inventors

Daejeon, South Korea

Hee-Jung Kim