Sk Chemicals Co., Ltd.

Ju-Sik Kang

Jeong Ho Park

Song Lee

Hee Il Chae

Yu Mi Chang

Yu-Mi Chang

Nam-Choul Yang

Jeong-Ho Park

Jae Kyun Park

Kyung Sil Yoon

Yong-Jun Shin

Suk Woon Jun

Jae-Kyun Park

Sung-Yung Lee

Min-Hyuk Lee

Hee-Il Chae

The present invention relates to a method for preparing terephthalic acid, and terephthalic acid prepared therefrom. Specifically, according to one embodiment of the present invention, by including the step of hydrolyzing a compound prepared by depolymerizing a waste polyester using a specific hydrolysis catalyst, terephthalic acid can be prepared in an environmentally friendly manner, and high purity terephthalic acid can be provided.

Method for preparing terephthalic acid, and terephthalic acid prepared therefrom

A method of preparing 3(4),8(9)-bisformyltricyclo[5.2.1.0]decane is provided. According to the present invention, 3(4),8(9)-bisformyltricyclo[5.2.1.0]decane (TCDDA) may be prepared with a high conversion rate and purity without a separate catalyst recovery process.

Method for preparing 3(4),8(9)-bisformyltricyclo[5.2.1.0]decane

Provided are a tricyclodecane dimethanol composition, in which a ratio of isomers is controlled, and a preparation method thereof.

Tricyclodecane dimethanol composition and preparation method of the same

The present invention relates to a phosphine precursor for the preparation of a quantum dot, and a quantum dot prepared therefrom. Using the phosphine precursor for the preparation of a quantum dot of the present invention, a quantum dot with improved luminous efficiency and higher luminous color purity can be provided.

Phosphine precursor for preparing quantum dot and quantum dot prepared therefrom

Provided are a tricyclodecane dimethanol composition, in which a ratio of structural isomers is controlled, and a preparation method thereof.

Provided are a tricyclodecane dimethanol composition which may be suitably used in preparing a polyester resin exhibiting excellent solvent resistance and chemical resistance when forming a coating film and having excellent solubility in organic solvents or water, and a preparation method thereof.

Provided are a tricyclodecane dimethanol composition which may be usefully applied to the preparation of a high heat resistant polyester by reducing the content of impurities, and a preparation method thereof.

This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device has high thermal stability, high triplet energy and high hole transport capability, and the organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet exciton of a phosphorescent light emitting material is confined, thus improving efficiency of the organic electroluminescent device.

Compound for organic eletroluminescent device and organic electroluminescent device including the same

This invention relates to a compound for an organic electroluminescent device and to an organic electroluminescent device including the same. This compound for an organic electroluminescent device including the same is improved in thermal stability and light emission efficiency. When this compound is used as a hole transport layer material, a triplet energy of a phosphorescent light emitting material is increased, thus improving the efficiency of the organic electroluminescent device.

Compound for organic electroluminescent device and organic electroluminescent device including the same

Disclosed are a novel diimmonium-based compound that has low light absorption in visible light region and has superior light absorption efficiency in near infrared region, and has superior durability and weatherability, and a near infrared absorption filter using the same. The diimmonium-based compound is represented by the formula 1 of claim

Diimmonium-based component and near infrared absorption filter using same

A novel copper phthalocyanine compound with low absorptivity in the visible light region and high absorptivity in the near-infrared light region, and a near-infrared absorption filter using the same are disclosed. The near-infrared absorption copper phthalocyanine compound is represented by the following Formula 1, wherein, A, A, A, A, A, A, Aand Aare independently OR, SRor a halogen atom, wherein at least four thereof are OR; A, A, A, A, A, A, Aand Aare independently OR, SR, NRRor a halogen atom, wherein at least two thereof are NRR, and at least four thereof are OR; R, R, Rand Rare independently an alkyl group oftocarbon atoms, an aryl group oftocarbon atoms, or an aralkyl group oftocarbon atoms.

Copper phthalocyanine compounds and near-infrared absorption filter using the same

A vanadium phthalocyanine compound with low absorptivity in the visible light region and high absorptivity in the near-infrared light region, and represented by the following Formula: 

Vanadium phthalocyanine compounds and near-infrared absorption filter using the same

Disclosed are a diimmonium salt and a near infrared ray absorption film including the same which is used for blocking the near infrared ray. The diimmonium salt for a near infrared ray absorption film is represented by Formula 1 of the specification, wherein, n is an integer of 1 or 2, Rto Rare independently a substituted or unsubstituted linear or branched C-Calkyl group, the substituent for the alkyl group is selected from the group consisting of a cyano group, a nitro group, a carboxyl group, a sulfone group, a halogen atom, a hydroxyl group, a C-Calkoxy, alkoxyalkoxy, acyloxy, or alkylamino group, and C-Caryl or aryloxy group, and X is a substituted fluoro alkyl phosphate anion represented by Formula 2 of the specification, wherein, x is an integer of 0 or 1, y is an integer of 1, 2 or 3, z is an integer of 6-y, and Rto Rare independently a hydrogen atom (H) or a fluorine atom (F).

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Hwaseong-si, South Korea

Ju-Sik Kang