Sk Innovation Co., Ltd.

Sk Geo Centric Co., Ltd.

Sk Global Chemical Co., Ltd.

Other

Lg Chem, Ltd

Sun Joo Kim

Ho Seong Lee

Jae Hyun Park

Min Gu Kim

Kwang Kuk Lee

Jin Su Ham

Hong Chan Kim

Seong Moon Jung

Doh Yeon Park

Jin Haek Yang

Min Ho Jung

Dae Gon Han

Wan Ju Jeong

Jae Eun Lee

Jang Hoon Ock

Jong Sik Choi

Hye Ryoung Lee

Byoung Kyu Kwak

Hoon Ahn

Young Min Kong

Mi So Kim

Kyung Jin Ma

Juan Carlos Estevez Videira

In Su Lee

Manuel David Recasens Alvaro

Provided is a lubricating composition for inhibiting plugging including a base oil and any one selected from a fatty acid and an emulsifier, with the lubricating composition forming a single phase even when a carboxylic acid-based monomer is introduced with respect to the base oil. The lubricating composition suppresses plugging occurring in a process of preparing a copolymer derived from the carboxylic acid-based monomer. In addition, also provided is a method of inhibiting plugging using the lubricating composition for inhibiting plugging.

Lubricating composition for inhibiting plugging and method of inhibiting plugging using the same

The present invention relates to a method for producing an ethylene-based copolymer, and more particularly, to a method for producing an ethylene-based copolymer capable of increasing process efficiency by preventing plugging and corrosion of a facility. The method for producing an ethylene-based copolymer includes a producing mode and a washing mode of which one is selectively performed. The producing mode includes: a) hyper-compressing primary compressed ethylene, and a mixture including a carboxylic acid-containing comonomer and a polar solvent to produce a compressed material; b) reacting the compressed material to produce a reaction product including an ethylene-based copolymer; and c) separating and recovering unreacted residues from the reaction product and introducing the unreacted residues into the mixture of step a). The washing mode includes: re-supplying the compressed material produced in step a) to step a) as a mixture, without performing step b).

Washing methods for ethylene-acrylic acid copolymer manufacturing process using solvent

In a method of producing an ethylene-carboxylic acid copolymer, a monomer solution containing a carboxylic acid monomer is supplied from a discharging unit. The carboxylic acid monomer is copolymerized with an ethylene-based monomer. A coefficient of friction between the discharging unit and the monomer solution is maintained as 0.3 or less.

Method of producing ethylene-carboxylic acid compolymer

A lubricant composition includes a base oil, a phenothiazine-based polymerization inhibitor, and a polymerization inhibitory accelerator including a hindered phenol-based compound and a hydroquinone-based compound. A self-polymerization in a polymerizing process is suppressed by an interaction between the polymerization inhibitor and the polymerization inhibitory accelerator. A method of preparing a copolymer using the lubricant composition is also provided.

Lubricant composition and method of preparing copolymer using the same

Provided are a fluoreneol-based monomer, a polymer for preparing a resist underlayer film obtained therefrom, a resist underlayer film composition containing the polymer, and a method for forming a resist underlayer film using the resist underlayer film composition, wherein the fluoreneol-based monomer is represented by Chemical Formula 2 below: 

Polymer for preparing resist underlayer film, resist underlayer film composition containing the polymer and method for forming resist underlayer film using the composition

A ceramic filter and method for preparing the same. The method for preparing the ceramic filter according to the present invention is characterized in comprising the steps of: (a) coating firstly a ceramic green paper prepared by using a slurry solution comprising ceramic fiber of 0.1-10 mm length, with an aluminum silicate solution and drying the firstly coated paper; (b) coating secondly the dried ceramic green paper with an aluminum phosphate solution and drying the secondly coated paper; and (c) calcining the dried ceramic green paper obtained from the step (b). The ceramic filter according to the present invention has excellent mechanical strength since the bonding strength between ceramic fibers is very high, and shows good porosity, gas permeability, and efficiency for capturing microparticles since the pores between the ceramic fibers are less blocked, and thus can be very usefully applied to gas exhaustion system for automobile.

Method for preparing ceramic filter and ceramic filter prepared by the same

Method for connecting precast concrete units which do not have projecting reinforcing bars by heating the concrete placed into the connecting point electrically in order to shorten the curing period. This method comprises the steps of covering the end surfaces of the precast concrete units with sheet-type wire nettings which have the same shape and size as that of the cross section of the precast concrete units, fixing the wire nettings in their position with nonconductive spacers, connecting the wire nettings to the terminals of an electric power source in order to heat the concrete as it becomes an electric resistant material and shorten the curing period.

Method for connecting precast concrete units

Growing community of inventors

Daejeon, South Korea

Sun Joo Kim