Cheil Industries Inc.

Lotte Advanced Materials Co., Ltd.

Sung Chul Choi

Sang Kyun Im

So Young Kwon

Jin Kyu Kim

Ki Yon Lee

Suk Min Jun

Joon Sung Kim

Eun Ju Lee

Seung Youb Bang

Young Sub Jin

Il Kyoung Kwon

Ki Chul Son

Jin A Je

The polyamide resin of the present invention is a polymer of a monomer mixture including a dicarboxylic acid and an amine-based compound, wherein the amine-based compound comprises diamine and triamine and a branching rate measured usingH-NMR is approximately 1% to approximately 8%.

Polyamide resin, polyamide resin composition containing same, preparation method therefor, and molded product including same

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

A polyamide ester resin is a polymer of: a dicarboxylic acid; a diamine; and a linear aliphatic diol, wherein, based on a total amount of the diamine and the linear aliphatic diol, the diamine is present in an amount of about 75 mol % to about 99 mol % and the linear aliphatic diol is present in an amount of about 1 mol % to about 25 mol %, and wherein the polyamide ester resin has a melting point (Tm) from about 280&#xb0; C. to about 320&#xb0; C. and a crystallization temperature (Tc) from about 260&#xb0; C. to about 290&#xb0; C. The polyamide ester resin can exhibit excellent heat resistance, discoloration resistance, and moldability.

Polyamide ester resin, method of preparing the same, and molded article including the same

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Uiwang-si, South Korea

Sung Chul Choi