Lg Chem, Ltd

Ji Ho Choi

Kyung Seop Noh

Sang Jin Jeon

Churl Young Park

Ki Soo Lee

Hee Kwang Park

Sang Eun An

Ra Yun Choi

Won-Sang Lee

Won Hee Kim

Sang Hoon Lee

Byung Seok Kim

Ah Young Seo

Jin Hyun Park

Jae Youp Cheong

In Sun Lee

In Yong Jung

The polypropylene copolymer according to the present invention has a low melting point and also is excellent in the low temperature heat sealing effect, transparency and strength, and the film prepared therefrom can be effectively used as a sealing layer of the non-stretched polypropylene-based film.

Non-stretched polypropylene-based film

The present invention relates to a polypropylene having excellent stiffness and achieving energy reduction during foaming.

High-stiffness and energy-reducing polypropylene for foaming

The present invention provides a method for preparing an olefin polymer which can exhibit excellent isotacticity in a high yield and thus is suitable for use in reinforcing a long fiber, and a long fiber comprising an olefin polymer produced according to the above preparation method. In the preparation method, there can be provided an olefin polymer having excellent isotacticity in a high yield can be obtained by using a supported catalyst in which a transition metal compound having a specific structure is supported on a carrier together with two kinds of cocatalysts. In particular, the supported catalyst can exhibit high activity, excellent process stability and high hydrogen reactivity, thereby providing an olefin polymer having a high flow rate with a regular and excellent morphology. Such olefin polymer exhibits high processability while having excellent mechanical properties such as a tensile strength and a flexural strength, and thus are very useful as long fiber reinforced resins. They are used as long fiber reinforced resins and have an advantage in that total volatile organic compounds (TVOC) are significantly low as compared with those of general-purpose long fiber reinforced resins.

Method for preparing long fiber-reinforcing olefin polymer and long fiber

The present invention relates to a polypropylene which exhibits high transparency and has a very low level of generation of volatile organic compounds, which has a total volatile organic compounds (TVOC) value of 60 &#x3bc;g/g or less, which is measured according to VDA 277 standardized by the German Automobile Industry Association by heating the polypropylene for 12 to 5 hours and converting all hydrocarbons detected per 1 g into an acetone content, and a haze value of 5% or less.

Polypropylene

The present invention relates to a preparation method of a polypropylene and a polypropylene obtained therefrom. More specifically, it relates to a method of preparing a polypropylene by using a catalyst that includes a novel metallocene compound having an excellent polymerization activity, and a polypropylene obtained by the method. According to the present invention, since the polypropylene is prepared by polymerizing propylene by using a novel metallocene compound having an excellent polymerization activity and hydrogen reactivity, the properties of the polypropylene can be easily controlled and the polypropylene having excellent mechanical properties can be obtained.

Preparation method of a polypropylene and a polypropylene obtained therefrom

The disclosed is a preparation method of a propylene-1-butene copolymer by using a catalyst that includes a novel metallocene compound having excellent copolymerization activity.

Preparation method of a propylene-1-butene copolymer and a propylene-1-butene copolymer obtained therefrom

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Daejeon, South Korea

Ji Ho Choi