Samyang Corporation

Mi Ran Kim

Ji Eun Kim

Kyung Moo Shin

Yun Ju Chang

Young Do Kwon

Jin Sik Choi

Hong Chol Rhee

Kyung Mo Sung

Seung Pil Jung

Seong Hyen Heo

Jae Kwan Kwon

So Ri Son

Min Sun Lee

Cheol Han Lee

Ki Tae Kang

The present invention relates to a polysiloxane-polycarbonate copolymer using a hydroxyl terminated polysiloxane mixture, and a method for producing same, and more specifically, to: a polysiloxane-polycarbonate copolymer which includes hydroxy-terminated polysiloxanes of chemical formulae 1 and 2 in a specific weight ratio as repeating units, and thus exhibits excellent transmittance and low-temperature impact strength compared to the case of using either of the hydroxy-terminated polysiloxanes by itself, and in which the overall production yield of the raw material polysiloxane is improved, such that the polysiloxane-polycarbonate copolymer is excellent in terms of economics; and a method for producing same.

Polysiloxane-polycarbonate copolymer using hydroxy-terminated polysiloxane mixture, and method for producing same

The present invention relates to a thermoplastic polyether ester elastomer (TPEE) having a hard segment and a soft segment and a method for preparing the same and, more specifically, to a thermoplastic polyether ester elastomer and a method for preparing the same, wherein a unit derived from an anhydrosugar alcohol derivative with improved reactivity derived from biomass is contained in the soft segment, and thus through the adjustment of the content of the anhydrosugar alcohol derivative, elastic characteristics and physical characteristics (for example, hardness, etc.), which are important characteristics of an elastomer, can be favorably maintained, the melting point variously required in the molding process of a final product can be easily controlled, a problem of depletion of, especially, petroleum resources as finite resources, can be solved, and environmental friendliness can be improved.

Thermoplastic polyether ester elastomer comprising anhydrosugar alcohol derivative and method for preparing same

The present invention relates to a polycarbonate copolymer and a preparation method therefor and, more specifically, to a polycarbonate copolymer comprising a fluorene ester oligomer and a polycarbonate as polymerization units, and a preparation method therefor.

Polycarbonate copolymer and preparation method therefor

The present invention relates to a thermoplastic copolymer resin having an excellent flame retardancy and transparency and a preparation method therefor and, more particularly, to a thermoplastic copolymer resin having an excellent balance of physical properties such as a transparency, a fluidity, a low temperature impact strength as well as a flame retardancy, a preparation method therefor, and a molded article comprising the thermoplastic copolymer resin, in which the thermoplastic copolymer resin is obtained by copolymerizing polysiloxane having a particular structure and a branched polycarbonate oligomer.

Thermoplastic copolymer resin having excellent flame retardancy and transparency and preparation method therefor

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Daejeon, South Korea

Mi Ran Kim