Cheil Industries Inc.

Mie Ock Kim

Chang Hoon Lee

Dong Baek Kim

Jin Yong Bae

O Sung Kwon

Bok Nam Jang

A polycarbonate-polysiloxane copolymer includes a polysiloxane unit. The polycarbonate-polysiloxane copolymer can have superior melt flowability and ductility while maintaining high transparency and low haze.

Polycarbonate-polysiloxane copolymer, and method for preparing same

A polycarbonate resin includes a repeating unit in its main chain of the following Chemical Formula 1: 

Polycarbonate resin and thermoplastic resin composition including polycarbonate resin

The present invention provides a catalyst for synthesizing an aromatic carbonate, a method of preparing the same, and a method of preparing an aromatic carbonate from dialkyl carbonate using the catalyst. The catalyst has a unit structure consisting of Formulae 1a, 1b or 1c:  wherein Ris C1-C5 alkyl, Ris substituted or unsubstituted phenyl.

Catalyst, method of preparing the same, and method of preparing aromatic carbonate from dialkyl carbonate using the same

A method of preparing aromatic carbonate from dialkyl carbonate includes reacting an aromatic hydroxyl compound and dialkyl carbonate in the presence of at least one type of samarium-containing catalyst represented by Formula 1, Formula 2, or a combination thereof:SmX&#x2003;&#x2003;[Formula 1] wherein each X is the same or different and is independently C1 to C10 alkoxy, C1 to C10 alkyl phenoxy or phenoxy, and  wherein R1 and R2 are the same or different and are independently hydrogen or C1 to C6 alkyl.

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Uiwang-si, South Korea

Mie Ock Kim