Cheil Industries Inc.

Seung Youb Bang

Jin Kyu Kim

Sang Kyun Im

So Young Kwon

Ki Yon Lee

Suk Min Jun

Sung Chul Choi

Eun Ju Lee

Jin A Je

A crystalline polyamide ester resin is prepared by copolymerizing (A) a dicarboxylic acid component, (B) a diamine component, and (C) a cyclic aliphatic diol component, and has a structure in which a dicarboxylic acid moiety derived from the dicarboxylic acid component (A), a diamine moiety derived from the diamine component (B) and a cyclic aliphatic diol moiety derived from the cyclic aliphatic diol component (C) are repeated. A molar ratio ((B):(C)) of the diamine component (B) to the cyclic aliphatic diol component (C) is about 80 to about 99:about 1 to about 20. The crystalline polyamide ester resin has a melting point (Tm) ranging from about 280&#xb0; C. to about 320&#xb0; C. and a crystallization temperature (Tc) ranging from about 260&#xb0; C. to about 290&#xb0; C. The crystalline polyamide ester resin can have excellent heat resistance, discoloration resistance and moldability.

Crystalline polyamide ester resin, method for preparing the same, and article including the same

The polyamide resin of the present invention is a polyamide resin containing an amine group and a carboxyl group, wherein the amine group concentration is about 200 to 300 &#x3bc;eq/g and two to six times as high as the carboxyl group concentration. The polyamide resin has excellent long-thermal stability.

Polyamide resin, preparation method therefor, and molded product including same

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Uiwang-si, South Korea

Seung Youb Bang