Korea Research Institute of Chemical Technology

Kwang-Won Lee

Jong-Wook Ha

Dong-Kwon Kim

In Jun Park

Soo-Bok Lee

Kwang-Han Kim

Jeong-Hoon Kim

Bong-Jun Chang

Jaewon Kim

Jeong Hoon Kim

Soo Bok Lee

Hyung-Sang Park

Sang-Yun Lee

Won-Wook So

Dae-hwan Jung

Jeong-Hun Kim

In-Joon Park

Juergen Ruehe

Sang-Man Ahn

Seung-Hak Choi

Mi-Sun Cha

A novel polyvinyl alcohol-based polymer membrane is disclosed. The novel polyvinyl alcohol-based polymer membrane of the present invention comprises two different compounds which are crosslinked by irradiating light such as UV or electronic beams or heat treatment to form a covalent bond between double bonds thereby providing improved properties such as chemical resistance and durability. This invention also relates to a process its preparation.

Crosslinked polyvinyl alcohol-based polymer membrane and a process of its preparation

The present invention relates to a method for preparing hexafluoropropylene oxide with high yield, and particularly to a method for preparing hexafluoropropylene oxide comprising the step of performing a two-phase interfacial reaction between an organic phase containing hexafluoropropylene and an aqueous phase containing a hypochlorite oxidant in the presence of a phase-transfer catalyst and a non-ionic surfactant to improve the degree of emulsification and dispersion of the organic phase and to increase the contact interfacial area, thereby increasing the efficiency and the yield of the reaction.

Manufacturing method of hexafluoropropylene oxide with high yield

The present invention relates to a fluorine-containing amphoteric polymer for surface coating and preparation method thereof, in particular, to a fluorine-containing amphoteric polymer for surface coating and preparation method thereof in which a hydrocarbon compound with hydrophilic groups serves as a main chain and a macromonomer prepared by copolymerization of an unsaturated hydrocarbon compound and a perfluoro alkyl compound is incorporated into side chains, thereby imparting amphoteric property on the present polymer. Therefore, the present polymer allows self-emulsification and shows soil release, water-repellent and oil-repellent properties with no help of emulsifier, applicable to a variety of industrial fields such as coating, adhesive, fiber, precision chemistry, biological/biochemical industry, electric/electronic, automobile and metal industries.

Fluorine-containing amphoteric polymer for surface coating and preparation method thereof

The present invention relates to a super water-repellent organic/inorganic composite material, more particularly to a new-concept super water-repellent organic/inorganic composite material with superior separation property having skin layer chemically immobilized with functional polymer on the porous inorganic support surface with fractal surface structure and pores of nanometers to micrometers, using grafting-from surface polymerization method.

Super water-repellent organic/inorganic composite membrane

Growing community of inventors

Daejeon, South Korea

Kwang-Won Lee