Patent application number | Description | Published |
20120172539 | Heat-Resistant Polyamide Resin Composition and Method of Preparing the Same - A polyamide resin produced by polymerization of an aliphatic diamine monomer mixture (A) and polyester resin (B) is disclosed. The aliphatic diamine monomer mixture (A) includes an aliphatic diamine monomer (a1) having 2 to 6 carbon atoms, and an aliphatic diamine monomer (a2) having 6 to 12 carbon atoms, with the proviso that (a1) and (a2) are different and have a different number of carbon atoms. A method to produce the polyamide resin is also disclosed. The polyamide resin can have excellent heat resistance, low hygroscopic property and good color. | 07-05-2012 |
20140187739 | Crystalline Polyamide Ester Resin, Method for Preparing the Same, and 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° C. to about 320° C. and a crystallization temperature (Tc) ranging from about 260° C. to about 290° C. The crystalline polyamide ester resin can have excellent heat resistance, discoloration resistance and moldability. | 07-03-2014 |
20140303341 | Polyamide Resin, Preparation Method Thereof, and Article Comprising Same - The present invention relates to: a polyamide resin which is a copolymer of a mixture comprising (a1) one or more aliphatic diamine monomers selected from C | 10-09-2014 |
20140357832 | Polyamide Ester Resin, Method of Preparing the Same, and Molded Article Including the 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° C. to about 320° C. and a crystallization temperature (Tc) from about 260° C. to about 290° C. The polyamide ester resin can exhibit excellent heat resistance, discoloration resistance, and moldability. | 12-04-2014 |
20150065681 | Method of Preparing Prepolymer Particle - Disclosed herein is a method of preparing prepolymer particles. The method includes injecting a prepolymer in a solution state by bottom-up type injection to form prepolymer particles by removing a solvent from the prepolymer in a solution state. The method can prepare prepolymer particles, which can be used in solid-state polymerization, using a bottom-up type flash process. | 03-05-2015 |
20150353681 | Polyamide Resin, Preparation Method Therefor, and Molded Product Including 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 μeq/g and two to six times as high as the carboxyl group concentration. The polyamide resin has excellent long-thermal stability. | 12-10-2015 |
20160032051 | Copolymerized Polyamide Resin, Method for Preparing the Same and Article Comprising the Same - A copolymerized polyamide resin includes a polymer of a monomer mixture comprising a dicarboxylic acid component and a diamine component including about 4 mol % to about 20 mol % of an alicyclic diamine represented by the Formula 1, wherein the polyamide resin has a melting temperature (Tm) from about 280 to about 330° C. and a crystallization temperature (Tc) from about 250 to about 300° C.: | 02-04-2016 |