Lg Chem, Ltd

Korea Institute of Machinery & Materials

Yongjin Kim

Won Taeck Lim

Wonmun Choi

Ji Eun Kim

Ki Hyun Kim

Gicheul Kim

Youn Ho Jung

Joonyub Song

Kwang Sun Choi

Seung Man Kim

Jae-hak Lee

The present disclosure relates to a novel cross-linking compound and a polymer using the same. More particularly, the present disclosure relates to a novel cross-linking compound that does not cause thermal decomposition at one end and thus prevents in advance the generation of volatile substances and decomposition products, and a polymer prepared using the same.

Cross-linking compound and polymer using the same

The present disclosure relates to a method for preparing a crosslinker compound in which a crosslinker compound capable of using for the production of a super absorbent polymer can be obtained in a higher yield by a simple manner. The crosslinker compound obtained by the above method can be used as a thermally decomposable crosslinker in the process of producing a super absorbent polymer.

Method for preparing crosslinker compound

An orthodontic wire bending device includes a providing part, a bending unit and a cutting part. The providing part is configured to provide a wire. The bending unit is disposed at a front side of the providing part, and includes a fixing part and a bending part. The fixing part is configured to fix the wire. The bending part is configured to bend the wire fixed by the fixing part. The cutting part is configured to cut the wire bent by the bending part. The bending part includes a bending module, and the bending module is rotated along a circumferential direction or moves along a direction to make contact with at least one side of the wire for bending the wire.

Orthodontic wire bending device

The invention relates to a method for preparing a (meth)acrylic acid ester-based compound, and according to the preparation method, a (meth)acrylic acid ester-based compound can be prepared with high purity and high yield, by easily introducing an acrylic structure into alcohol using a diamine-based compound and acid anhydride.

Method for preparing (meth)acrylic acid ester based compound

The present disclosure relates to a preparation method of an acrylic ester compound. The preparation method of an acrylic ester compound according to the present disclosure enables the use of acrylic anhydride as a reactant instead of acryloyl chloride, which is difficult to handle, by using an alkane diamine as a catalyst. Therefore, not only can the reaction be carried out at a low temperature, but also conversion to an acrylic ester compound and a yield of the acrylic ester compound can be improved.

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Daejeon, South Korea

Yongjin Kim