Sk Innovation Co., Ltd.

Sk Global Chemical Co., Ltd.

Sk-materials Co., Ltd.

Je Ho Lee

Cheol Woo Kim

Jae Hoon Kwak

Ho Seong Lee

Yu Na Shim

Jin Su Ham

Han Sol Lee

Jong Chan Kim

Hyo Seung Park

Young Bom Kim

Jin Kyung Jo

Jong Ho Lim

Jong Ho Lee

Jeon Koo Lee

Yang Eun Lee

Sudevan Sujith

Jeong Hyun Noh

An etching composition providing a high selection ratio enabling selective removal of a nitride film and minimization of an etching rate, a preparation method thereof, an etching composition additive prepared through a reaction of phosphoric anhydride and a silane compound represented by Formula 1 below, a method for preparing the same and an etching composition including the same are provided: 

Etching composition additive, method for preparing the same and etching composition comprising the same

An etchant composition includes phosphoric acid and a silane compound represented by the following Chemical Formula 1: wherein A is an n-valent radical, L is C-Chydrocarbylene, Rto Rare independently hydrogen, hydroxy, hydrocarbyl, or alkoxy, in which Rto Rexist respectively or are connected to each other by a heteroelement, and n is an integer of 2 to 5.

Etchant composition and silane compound

Provided is a method for producing poly(alkylene carbonate)polyol, and specifically, a method for producing poly(alkylene carbonate)polyol having carbonate, ester, and ether bonds by mixing a Salen-based catalyst and a double metal cyanide catalyst.

Method for producing poly(alkylene carbonate)polyol

Provided is a polyalkylene carbonate resin composition having high thermal resistance including: polyalkylene carbonate obtained by reacting carbon dioxide with one or two or more different epoxide compound(s) selected from the group consisting of C2-C10 alkylene oxide unsubstituted or substituted with halogen or alkoxy, C4-C20 cycloalkylene oxide unsubstituted or substituted with halogen or alkoxy, and C8-C20 styrene oxide unsubstituted or substituted with halogen, alkoxy, alkyl or aryl; an epoxy resin; and a curing agent.

Polyalkylene carbonate resin composition having high thermal stability

The present invention is directed to a novel complex synthesized from a Salen-type ligand. The novel complex contains a quaternary ammonium salt. The present invention is also directed to a preparation method of a copolymer of carbon dioxide and epoxide using the complex synthesized from a Salen-type ligand as a catalyst.

Complex and preparation method of poly(alkylene carbonate) using the same

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Daejeon, South Korea

Je Ho Lee