Lg Chem, Ltd

Sang-Soon Choi

Seung-Beom Cho

Na-ri Kim

Byeong-In Ahn

Dong-Mok Shin

Jun-Yeon Cho

Keong-Yeon Yoon

Myoung-hwan Oh

Young-Ji Tae

Jeong-Kyu Kim

Yeong-Dae Kim

Hyun-Chul Ha

Sang-Yun Jung

Ick-Soon Kwak

Chang-Hoon Sin

Na-Ri Kim

The present invention relates to a polyurethane resin composition for a support pad including a polyurethane resin, a DMF solvent, an anionic surfactant, and polyethylene glycol (PEG), and a polyurethane support pad including the polyurethane resin composition for a support pad. According to the present invention, long and large pores may be uniformly formed therein, and thus a support pad having an excellent compression rate and compression recovery rate may be provided.

Polyurethane resin composition for support pad and polyurethane support pad using the same

The present invention relates to a polyurethane resin composition including a first polyurethane resin and a second polyurethane resin that are different from each other in their compositions, an organic solvent, and a surfactant, and a polyurethane mounting pad manufactured from the resin composition.

Poly-urethane resin and poly-urethane absorbing pad using the same

Disclosed is a method for preparing cerium carbonate that can prepare cerium carbonate having uniform crystal structure, shape and size with high productivity. The method for preparing cerium carbonate comprises: continuously introducing a reaction solution comprising cerium precursor and urea in a tubular reactor including an inlet, an outlet, and one or more reaction tubes through the inlet; reacting the cerium precursor with urea at an elevated temperature in the reaction tube; and, continuously discharging cerium carbonate formed by the reaction of the cerium precursor and urea to the outlet.

Method for preparing cerium carbonate

The present invention relates to crystalline cerium oxide prepared in a simple, economical, and efficient manner, of which crystal structure, shape, and size can be easily adjusted and that exhibits excellent polishing properties, and a preparation method thereof. The crystalline cerium oxide can be prepared as sub-micron crystalline cerium oxide that has a mean volume diameter and a diameter standard deviation within a predetermined range.

Crystalline cerium oxide and preparation method of the same

Disclosed is a method for preparing cerium carbonate that can improve yield or productivity of cerium carbonate and enables preparation of cerium carbonate having uniform diameter, cerium carbonate, and a method for preparing cerium oxide. The method for preparing cerium carbonate comprises mixing the cerium precursor with urea; and, elevating the temperature of the mixture to 50&#xb0; C. or more in the absence of a separate reaction medium to react the cerium precursor with urea in the presence of a polymer dispersant.

Method for preparing cerium carbonate and cerium oxide

This disclosure relates to a polyurethane resin composition for a mounting pad, including a polyurethane resin, C9-15 alkyl benzene sulfonic acid or a salt thereof, and a DMF solvent, and a polyurethane mounting pad using the same, whereby long and large pores may be uniformly formed thereinside to provide a mounting pad having low hardness, excellent compressibility, and a high compression modulus.

Polyurethane resin composition for mounting pad and polyurethane mounting pad using the same

The present invention relates to a method for preparing cerium oxide which enables preparation of cerium oxide showing improved polishing performance, cerium oxide prepared therefrom, and CMP slurry comprising the same. The method for preparing cerium oxide comprises the step of contacting cerium oxide with primary alcohol to increase specific surface area of the cerium oxide 10% or more.

Method for preparing cerium oxide, cerium oxide prepared therefrom and CMP slurry comprising the same

The present invention relates to a method for preparing cerium carbonate which enables preparation of hexagonal cerium carbonate by a simplified process, a cerium carbonate powder prepared thereby, and a method for preparing a cerium oxide powder using the same. The method for preparing cerium carbonate comprises the step of contact-reacting orthorhombic cerium carbonate with a primary alcohol aqueous solution comprising water and primary alcohol at a weight ratio of 1:0.1 or more at a temperature of 160&#xb0; C. or more to form hexagonal cerium carbonate.

The present invention relates to a method for preparing cerium carbonate that can improve yield and productivity of cerium carbonate, cerium carbonate powder, and a method for preparing cerium oxide using the same. The method for preparing cerium carbonate comprises the steps of mixing a cerium precursor and urea; and, elevating the temperature of the mixture to 50&#x2dc;250&#xb0; C. under solvent free condition to react the cerium precursor and urea.

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Daejeon, South Korea

Sang-Soon Choi