Dongbu Electronics, Co. Ltd.

Sk Chemicals Co., Ltd.

Dongbu Hitek Co., Ltd.

Samsung Electronics Co., Ltd.

Lms Co., Ltd.

Doosan Heavy Industries & Construction Co., Ltd

1Drop Inc.

Jeong Ho Park

Jihoon Kim

Ju-Sik Kang

Song Lee

Hee Il Chae

Nam-Choul Yang

Yong-Jun Shin

Yu-Mi Chang

Min Soo Kim

Jong Min Choi

Jong-In Lee

Seung Chul Lee

Yu Mi Chang

Jae Kyun Park

Kyung Sil Yoon

Suk Woon Jun

Jae-Kyun Park

Young Il Kim

Seoung Jae Yoo

Long Yan

Dae Kyeun Kim

Jae-il Chung

Yanggyun Jung

Hosung Bang

Soo-Hyun Kim

Jaeil Seo

Hyun Jun Cho

Yong Shig Shim

Chong Kwon Pae

Chang-yeol Lee

Joo Won Rhee

Eric Hyun Surk Ryu

Hee-il Chae

So Hyeon Baek

Hee-Il Chae

Seong Soo Hong

Jeong In Bag

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 polyamide-10 and a method for preparing the same, and according to this invention, polyamide-10 having superior mechanical and thermal properties can be prepared by preparing polyamide-10 while controlling the condensation polymerization conditions of 10-aminodecanoic acid.

Polyamide-10 having superior mechanical and thermal properties and method for preparation thereof

A photoplethysmogram (PPG) sensor includes a pixel array that collects light, a pixel sampler that converts the light collected through the pixel array into a plurality of pixel data, an effective area determiner that determines an effective area and a non-effective area of the pixel array based on the pixel data, a power controller that is operable to cut off power to the non-effective area of the pixel array, and a PPG data generator that generates PPG data from pixel data corresponding to the effective area among the pixel data.

PPG sensor and method of operating the same

A method for cycloaddition of dimethyl muconate is disclosed. According to the method, a direct transferring of a solid phase trans,trans-dimehtyl muconate into a reactor pre-filled with ethylene gas increases the efficiency of the reaction and suppress side reactions resulting an improvements in yield and purity. Furthermore, the method is capable of obtaining a high yield of dimethylcyclohex-2-en-1,4-dicarboxylate at a lower cost, and therefore is also useful for the mass synthesis of dimethyl terephthalate.

Method for cycloaddition of dimethyl muconate

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

The present invention relates to a method for preparing a tris(trialkylsilyl)phosphine in high yield and high purity with safety and no risk of fire or explosion.

Method for preparing tris(trialkylsilyl)phosphine

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

An optical film is formed with a plurality of optical patterns having peak and valley portions and a lighting device may include such an optical film. Pitches of the optical patterns, heights of the peak portions and depths of the valley portions are irregular, and plan and side structures of the optical patterns have a non-linear non-symmetrical arrangement structure in which the peak and valley portions are irregularly bent. According to an optical film and a lighting device including such an optical film, a moir&#xe9; phenomenon can be prevented in advance, abrasion resistance can be improved, optical defects such as scratches cannot be observed with the naked eye, a wet-out phenomenon can be prevented, and a viewing angle can be broadened.

Growing community of inventors

Gyeonggi-do, South Korea

Jeong Ho Park