Korea Research Institute of Chemical Technology

Yong Seok Kim

Jong Chan Won

Jae Heung Lee

Byoung Gak Kim

Hyun Min Jung

Jin Young Park

Dong Gyun Kim

Dong-Gyun Kim

No Kyun Park

Sung-Goo Lee

Youngjae Yoo

Hwan Seok Choi

Dohyun Im

Jun Woo Jeon

Soon-Ryoung Hur

Eun Sang Lee

Young Jae Yoo

Bo Mi Maeng

Seong Wook Lee

The present invention relates to a compound having a bis phenylene group substituted with alkylamide, a composition comprising the same for the control of polyphenylene polymer flowability and a method for controlling polyphenylene polymer flowability using the same. The said compound can improve the flowability of polyphenylene polymer so that it can be used for processing polyphenylene polymer to improve the flowability, thereby providing economic benefits by diversifying PPS parts and improving workability. In addition, the said compound can control and improve the flowability by regulating the length of phenyl-conjugated alkyl, so that it can be effectively used as a flowability regulator of polyphenylene polymer particularly polyphenylene sulfide.

Compound having bis phenylene group substituted with alkylamide, composition for controlling polyphenylene polymer flowability and method of polyphenylene polymer flowability control using the same

The present disclosure relates to a polyamide-based polymer composition with superior fluidity and a polyamide-based composite material with superior mechanical strength prepared therefrom. More specifically, it relates to a polyamide-based polymer composition containing 0.1-5 parts by weight of dicyclohexylmethane bisdecanoamide, which is a cyclic compound, as a fluidity control agent based on 100 parts by weight of a mixture consisting of 20-90 wt % of a polyamide-based resin and 10-80 wt % of a reinforcing fiber, a polyamide-based composite material prepared using the same, and a method for preparing the same. The polymer composition according to the present disclosure, wherein dicyclohexylmethane bisdecanoamide is used as a fluidity control agent, provides an effect of reducing friction between a molten resin and a processing machine and greatly reducing torque by effectively dispersing a reinforcing fiber in a polyamide-based resin. Also, the polymer composition according to the present disclosure may be usefully used in compounding, extrusion molding and injection molding of polyamide-based engineering plastics containing reinforcing fibers at high contents. In addition, according to the present disclosure, the addition of the fluidity control agent greatly improves flowability during processing. Therefore, a polyamide-based composite material with superior mechanical strength can be prepared under relatively mild conditions because uniform mixing of the reinforcing fiber and the polymer resin is induced.

Polyamide based polymer compositions comprising cyclic compound and polymer based composite material using the same

The present invention relates to a method for preparing polymer-nanoparticles having a core-shell structure by uniformly coating a polymer on metal and inorganic particles, polymer-nanoparticles prepared thereby, and a polymer-nanoparticle composite comprising the same, and more specifically, a method for preparing polymer-nanoparticles having a core-shell structure by uniformly coating a polymer on metal and inorganic particles, polymer-nanoparticles prepared thereby, and a polymer-nanoparticle composite including the same, wherein when forming a polymer coating layer on surfaces of particles that are not subjected to separate surface treatment, excessive polymers uncoated on nanoparticles are easily removed by adding to an ionic liquid or an apolar solvent so that the polymer coating layer is formed with a nanometer-scale uniform thickness and a dense coating density, thereby showing excellent dispersibility in a polymer matrix.

Method for preparing polymer-nanoparticles having core-shell structure by uniformly coating polymer on metal and inorganic particles, polymer-nanoparticles prepared thereby, and polymer-nanoparticle composite comprising same

The present invention relates to a method of preparing a microcapsule with a double-layered structure which comprises the steps of performing an interfacial polymerization of an amine-aldehyde prepolymer on droplets containing an inorganic metal precursor selected from carboxylate and alkoxide compounds, and hydrolyzing the including inorganic precursors for formation of inorganic inner layer. The method of the present invention can prepare a microcapsule with a double-layered structure of an inorganic inner layer and a polymer outer layer, which is effective for eluting and substituting a core material inside the capsule.

Preparation of microcapsule with double layered structure

Disclosed is a method for preparing a poly(ethersulfonimide or ethersulfonamide) copolymer using cyclic oligomers, and more particularly, to a method for preparing a poly(ethersulfonimide or ethersulfonamide) copolymer by preparing a cyclic ether sulfone oligomer and a cyclic imide or amide oligomer and subjecting the cyclic ether sulfone oligomer and the cyclic imide or amide oligomer to ring-opening copolymerization in the presence of an alkali metal fluoride catalyst.

Method for preparing a poly(ether sulfonimide or -amide) copolymer using cyclic oligomers

The present invention relates to aromatic polyether resins crosslinked with amic acid or imide side chain, and more particularly, to the aromatic polyether resin crosslinked by amic acid or imide side chain, which is produced by heat curing of amic acid, wherein introduction of imide groups to the basic backbone provides excellent chemical resistance as well as heat resistance and improves surface roughness when coated as a thin film so that it can be suitable for films and flexible display plate substrate.

Aromatic polyether resins crosslinked by amic acid or imide side chain

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Daejeon, South Korea

Yong Seok Kim