Samsung Fine Chemicals Co., Ltd.

Hanmi Pharmaceutical Co., Ltd.

S-enpol Co., Ltd.

Saehan Polymer Co., Ltd

Jong Pil Chun

Min Kyoung Kim

Ki Chull Yun

Ye Jin Kim

Gwan Sun Lee

Young Kil Chang

Sung Bae Park

Gyung Don Kang

Hee Soo Kim

Soo Youn Choi

Ji Soo Ahn

Joon Hyung Koh

Seong Yong Hong

There are provided a resin composition for foaming including a biodegradable resin and a foamed article made thereof. The resin composition for foaming according to the present invention includes an ethylene-vinyl acetate resin, a biodegradable polyester resin containing a monomer of a double bond compound, a cross-linking agent, a co-crosslinking agent, a filler, and a foaming agent. In the resin composition, the double bond in the biodegradable polyester resin can be chemically cross-linked to the ethylene-vinyl acetate resin by a cross-linking agent, so that a compatibility with the ethylene-vinyl acetate resin can be improved, processability (mold releasability) during a mixing and melting process can be improved, and a foaming property and a mechanical property of a foamed article can be remarkably improved.

Resin composition for foaming containing biodegradable resin, and foam manufactured therefrom

There is provided a method of preparation for a biodegradable co-polyester, the method including: forming an oligomer through a primary esterification reaction between a hydroxy group of an aliphatic dihydroxy compound and a carboxylic group of an aliphatic dicarboxylic acid compound; performing a secondary esterification reaction between the formed oligomer and an aromatic dicarboxylic acid compound; and performing a polycondensation reaction in a vacuum, in which sequentially divided addition of the aromatic dicarboxylic acid compound is performed and the weight ratio of the aromatic dicarboxylic acid compound with respect to the oligomer for each time of the sequentially divided addition is from 2:8 to 5:5. The method efficiently increases a solubility of aromatic dicarboxylic acid, thereby increasing a reaction rate and reducing a side reaction.

Method for manufacturing biodegradable copolymer by split-injecting aromatic dicarboxylic acid compound

Process for preparation of cefdinir

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Daejeon, South Korea

Jong Pil Chun