Cheil Industries Inc.

Lotte Advanced Materials Co., Ltd.

Samsung Sdi Co., Inc.

Ki Yon Lee

Sang Kyun Im

So Young Kwon

Jin Kyu Kim

Suk Min Jun

Young Sub Jin

Joon Sung Kim

Sung Chul Choi

Eun Ju Lee

Shin Hyo Bae

Seung Youb Bang

Young Jun Kim

Tae Joon Park

Kyoung Kyun Park

Sang Hyun Jeon

Jin A Je

Su Yeong Son

A copolymerized polyamide resin includes a polymer of a monomer mixture comprising a dicarboxylic acid component comprising adipic acid and a dicarboxylic acid represented by Formula 1, wherein each Ris independently a Cto Calkyl group and a is an integer from 0 to 4, and a diamine component comprising m-xylene diamine and a diamine represented by Formula 2, wherein A is a single bond or a Cto Chydrocarbon group, Rand Rare each independently a Cto Calkyl group, and b and c are each independently an integer from 0 to 4, wherein the copolymerized polyamide resin has a difference between a melting temperature (Tm) and a crystallization temperature (Tc) of about 50&#xb0; C. or more. The copolymerized polyamide resin may have excellent heat resistance and reduced or no gel generation and yellowing phenomenon in a molding process. 

Copolymerized polyamide resin, method for preparing the same and molded article comprising the same

A continuous solid-state polymerization device according to the present invention comprises: a feeder for injecting a prepolymer continuously; a transverse reactor connected to the feeder via a first connector to receive the prepolymer from the feeder and to perform solid-state polymerization, the reactor itself rotating; and a chamber connected to the transverse reactor via a second connector to receive a polymer, which has been discharged from the transverse reactor, and solid-state polymerization of which has been completed, and to discharge the polymer, wherein the transverse reactor has a demolding coating film formed on the inner wall thereof, and the feeder, the transverse reactor and the chamber are in a vacuum state. The continuous solid-state polymerization device can prevent formation of an interval, in which the prepolymer stagnates, and can perform solid-state polymerization continuously in a vacuum state without using inert gas.

Continuous solid-state polymerization device and method

A polyamide ester resin includes: a repeat unit derived from a dicarboxylic acid; a repeat unit derived from a diamine; and a repeat unit represented by the following Formula 1, wherein the polyamide ester resin has a melting temperature (Tm) of about 280&#xb0; C. or more. The polyamide ester resin can exhibit excellent properties in terms of moisture absorption resistance, heat resistance, discoloration resistance, fluidity and the like by using a cyclic ester. 

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

Ki Yon Lee