Lg Chem, Ltd

Other

Dong Hoon Park

Jin Young Ryu

Young Jae Hur

Taebin Ahn

Yong Man Lee

Yoontae Hwang

Jihye Ryu

A method of preparing a superabsorbent polymer includes preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked; and heating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin, wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more. A superabsorbent polymer having improved rewetting property liquid permeability is also provided.

Superabsorbent polymer and preparation method for the same

Provided are a dispersant for a separator of a non-aqueous electrolyte battery, the dispersant including a cyanoethyl group-containing polymer, a separator of a non-aqueous electrolyte battery using the same, and a non-aqueous electrolyte battery.

Dispersant for separator of non-aqueous electrolyte battery including cyanoethyl group-containing polymer, separator of non-aqueous electrolyte battery, and non-aqueous electrolyte battery

A method of preparing a superabsorbent polymer includes preparing a base resin in which an acrylic acid-based monomer having acidic groups which are at least partially neutralized and an internal crosslinking agent are crosslinked in the presence of a sodium polycarboxylate surfactant; and heating the base resin in the presence of a surface crosslinking agent to carry out surface modification of the base resin, wherein the internal crosslinking agent includes a first epoxy crosslinking agent having an epoxy equivalent weight of 100 g/eq or more to less than 130 g/eq, and a second epoxy crosslinking agent having an epoxy equivalent weight of 130 g/eq or more. The superabsorbent polymer provides improved rewetting property and liquid permeability.

A method for preparing a 2-cyanoethyl group-containing polymer is provided. The method can prepare a purified 2-cyanoethyl group-containing polymer with high purity even while a reduced amount of water was used during the purification process, thus reducing the amount of wastewater generated.

Method for preparing 2-cyanoethyl group-containing polymer

A transfer shaft for an automatic transmission, provided between a transfer idle gear for outputting driving power from the automatic transmission and a differential driven gear for transmitting the driving power to a drive axle thereby transmitting an output of the transmission to the drive axle, comprising a first shock absorbing means which interconnects a transfer driven gear meshed with the transfer idle gear with one side of the transfer shaft, and absorbs shocks transmitted between the transmission and the drive axle, and a second shock absorbing means which interconnects an opposite side of the transfer shaft, in which said first shock absorbing means is disposed, with a differential drive gear for transmitting the driving power to a differential, and absorbs the shocks transmitted between the transmission and the drive axle.

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Daejeon, South Korea

Dong Hoon Park