Lg Chem, Ltd

Young Wook Son

Moo Ho Hong

Jung Jun Park

Ki Jae Lee

Un Ko

Young Young Hwang

Hyong Min Bahn

Byoung Kyu Chun

Min Jeong Kim

Tae Yun Ko

Byoungkue Chun

Byoungkue Jeon

Daehyeon Hwang

Byoung Kue Chun

Hyoung Min Bahn

Hyong Minh Bahn

Provided are a polycarbonate resin composition comprising a polycarbonate resin, a black colorant, a yellow colorant, and at least one ultraviolet absorber selected from the group consisting of a benzotriazole-based compound, a benzophenone-based compound, and a triazine-based compound, and an optical molded article composed thereof.

Polycarbonate resin composition and optical molded article composed thereof

The present invention relates to a polycarbonate resin composition and an optical molded article comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color stability and thus can ensure high transparency, and further can enhance the stability of a polycarbonate resin.

Polycarbonate resin composition and optical molded article using the same

Provided are a novel polyorganosiloxane capable of preparing copolycarbonate with improved weather resistance and flowability while maintaining the intrinsic physical properties of polycarbonate resin, and a copolycarbonate prepared by using the same.

Polyorganosiloxane, and copolycarbonate prepared by using the same

The present invention provides a method for preparing a polycarbonate by removing a solvent from a polycarbonate polymerization solution without impairing the physical properties of the polycarbonate.

Method for preparing polycarbonate

Disclosed are a copolycarbonate resin composition having improved mechanical properties such as impact resistance and chemical resistance while maintaining resin flowability, and an article including the same, where the copolycarbonate resin composition comprises a copolycarbonate resin including an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating unit having at least one siloxane bond; and a polysiloxane polymer containing a hydrocarbon-based functional group having 2 or more carbon atoms.

Copolycarbonate resin composition and article including the same

Disclosed is a copolycarbonate having an aromatic polycarbonate-based first repeating unit and one or more aromatic polycarbonate-based second repeating units having siloxane bonds, where the copolycarbonate provides an improved residence heat stability, and where the second repeating unit includes a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3: 

Copolycarbonate and composition comprising the same

The present invention relates to a polycarbonate resin composition and an optical molded product comprising the same. The polycarbonate resin composition according to the present invention is excellent in transmittance and color uniformity which are required for a light guide plate, and also excellent in processability. Thus, it can be effectively used as a material of the light guide plate.

Polycarbonate resin composition and optical molded product comprising the same

The present disclosure relates to a polycarbonate resin and a method of preparing the same, has an effect of providing a polycarbonate resin having superior chemical resistance and wear resistance due to application of a predetermined comonomer thereto, and a method of preparing the same.

Copolycarbonate resin and method for preparing the same

Provided are a copolycarbonate having superior weather resistance as well as excellent mechanical properties, and a preparation method thereof.

Copolycarbonate and method for preparing the same

The present invention relates to a copolycarbonate resin composition comprising a copolycarbonate in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and a UV stabilizer. Since the present copolycarbonate resin composition has excellent weather resistance, the article prepared by using this composition exhibits less deteriorated surface quality and physical properties caused by ultraviolet rays or the like when exposed to the outside.

Copolycarbonate composition and article containing the same

The present invention relates to a copolycarbonate and a molded article comprising the same. The copolycarbonates according to the present invention has a structure in which a specific siloxane compound is introduced in a main chain of the polycarbonate, and has effects of improving impact strength at room temperature, impact strength at low temperature, and melt index properties.

Disclosed is a polycarbonate composition including a polycarbonate; and a copolycarbonate, where the copolycarbonate includes: an aromatic polycarbonate-based first repeating unit; and aromatic polycatbonate-based second repeating units having siloxane bonds, which include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, where the ratio of an impact strength at room temperature and an impact strength at low-temperature (impact strength at room temperature/impact strength at low-temperature) as measured at 23&#xb0; C. and &#x2212;30&#xb0; C., respectively, in accordance with ASTM D256 (&#x215b; inch, Notched Izod) is 1.01 to 1.30, and the impact strength at room temperature is 840 to 1000 J/m: 

Copolycarbonate and composition containing the same

Disclosed is a polycarbonate resin composition including 1) a copolycarbonate having a repeating unit represented by Chemical Formula 1, a repeating unit represented by Chemical Formula 2, and a repeating unit represented by Chemical Formula 3, and 2) a polycarbonate: copolycarbonate in the composition provides improved melting properties while maintaining the physical properties of the copolycarbonate to the maximum.

Polycarbonate resin composition

Disclosed is a polycarbonate composition including a polycarbonate; and a copolycarbonate, where the copolycarbonate includes an aromatic polycarbonate-based first repeating unit; and aromatic polycarbonate-based second repeating units having siloxane bonds, which include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, where the copolycarbonate has a melt index (MI) of 3 to 9 g/10min as measured in accordance with ASTM D1238 (300&#xb0; C., 1.2 kg conditions), and a transparency of 87 to 91% as measured in accordance with ASTM D1003 (layer thickness of 3 mm):  The copolycarbonate in the composition exhibits an excellent transparency and a high spiral flow while having a high impact strength at room temperature and a low melt index.

Disclosed is a polycarbonate composition including a polycarbonate; and a copolycarbonate, where the copolycarbonate includes an aromatic polycarbonate-based first repeating unit; and aromatic polycarbonate-based second repeating units having siloxane bonds, which include a repeating unit represented by Chemical Formula 2 and a repeating unit represented by Chemical Formula 3, where the copolycarbonate has an impact strength at room temperature of 840 to 1000 J/m as measured at 23&#xb0; C. in accordance with ASTM D256 (&#x215b; inch, Notched Izod), and the copolycarbonate satisfies Equation 1: TS/TS&#x2267;0.80.&#x2003;&#x2003;[Equation 1] The copolycarbonate in the composition provides an improved chemical resistance and impact strength simultaneously.

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Daejeon, South Korea

Young Wook Son