Samsung Fine Chemicals Co., Ltd.

Lotte Fine Chemical Co., Ltd.

Soo Youn Choi

Min Kyoung Kim

Ye Jin Kim

Ki Chull Yun

Hee Soo Kim

Jong Pil Chun

The present invention provides a method of preparing a polyester-based polymer and a polyester-based polymer prepared by the method. The method of preparing the polyester-based polymer includes a prepolymerization step of polymerizing a dicarboxylic acid compound (A), a diol compound (B), and an aromatic branching agent (C) at 160-220&#xb0; C. to produce a prepolymer; and a condensation polymerization step of performing a condensation polymerization of the prepolymer at 200-250&#xb0; C., under a vacuum pressure of 0.1 to 2 Torr.

Method for preparing biodegradable polyester copolymer

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

Growing community of inventors

Jeonju-si, South Korea

Soo Youn Choi