Cheil Industries Inc.

Lotte Advanced Materials Co., Ltd.

Samsung Sdi Co., Inc.

So Young Kwon

Young Sub Jin

Jin Kyu Kim

Tae Joon Park

Bok Nam Jang

Sang Kyun Im

Ki Yon Lee

Suk Min Jun

Sung Chul Choi

Joon Sung Kim

Eun Ju Lee

Byeong Do Lee

Sung Kwan Kim

Shin Hyo Bae

Seung Youb Bang

Hwan Seok Park

Jae Keun Hong

Chul In Lim

Kyoung Kyun Park

Ki Chul Son

Il Kyoung Kwon

Jin A Je

Su Yeong Son

Myung Ryul Lee

Seung Hyun Jang

Yong Tae Kim

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 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

The continuous solid-state polymerization device of the present invention comprises: a feeder for continuously introducing a prepolymer; a horizontal reactor which is connected via a first connecting part to the feeder and receives the prepolymer from the feeder so as to subject same to solid-state polymerization, wherein the reactor itself is rotated; a stirring device which comprises a stirring shaft rotating inside the horizontal reactor, in the direction opposite to that of the rotational axis of the horizontal reactor, and comprises stirring blades joined vertically to the stirring shaft; and a chamber which is connected via a second connecting part to the horizontal reactor and, once the solid-state polymerization has been completed, receives the resulting polymer discharged from the horizontal reactor, and, here, the feeder, the horizontal reactor and the chamber are in a vacuum state. The continuous solid-state polymerization device prevents the formation of prepolymer stagnation zones, and allows solid-state polymerization to take place continuously in the vacuum state without any inert gas.

Continuous solid-state polymerisation 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

The present invention provides a weather resistant thermoplastic resin with low gloss and a method of preparing the same. The thermoplastic resin of the present invention comprises a (meth)acrylic acid alkyl ester-based polymer (A) and a (meth)acrylic acid alkyl ester-based oligomeric prepolymer (B), and an aromatic vinyl-cyanide vinyl based copolymer (C), wherein the (meth)acrylic acid alkyl ester-based polymer (A) and the (meth)acrylic acid alkyl ester-based oligomeric prepolymer (B) form a network-shaped disperse phase and the aromatic vinyl-cyanide vinyl based copolymer (C) forms a continuous phase.

Weatherable thermoplastic resin composition having excellent low gloss characteristic and method of preparing the same

The present invention provides a thermoplastic resin composition which comprises (A) a (meth)acrylic acid alkyl ester-based polymer forming a network-shaped disperse phase; and (B) an aromatic vinyl-cyanide vinyl based copolymer forming a continuous phase. The thermoplastic resin composition of the present invention can have an excellent low gloss characteristics while maintaining basic physical properties of a weather resistance, impact strength, thermal resistance, and delamination characteristics.

Growing community of inventors

Uiwang-si, South Korea

So Young Kwon