Lg Chem, Ltd

Other

Joong Soo Kim

Dae Sik Hong

Ki Soo Lee

Eun Kyoung Song

Young Suk You

Hyuck Ju Kwon

Yi Young Choi

Myung Han Lee

Sun Mi Kim

Sung Hyun Park

Soon Ho Sun

Hyun Sup Lee

Yoon Ki Hong

Eun Young Shin

Ye Jin Lee

Yong Ho Lee

Heon Yong Kwon

Bog Ki Hong

Kyung Jin Cho

Yu Taek Sung

Oh Joo Kwon

Dong Hoon Jeong

Jong Sang Park

Woo Ri Kim

Nak-Kyu Song

Ki Heon Song

Si Yong Kim

A method for evaluating long-term durability of a resin for piping is provided. Unlike the conventional FNCT evaluation method requiring a long period of time, the method disclosed herein is capable of predicting long-term durability of a resin for piping in a short time, by a simple calculation using a content of tie molecules, an entanglement molecular weight (M) and a content of ultrahigh molecular weight components. In addition, the olefinic polymer is configured to have a predetermined relationship in relation to the content of tie molecules, the entanglement molecular weight (M) and the content of ultrahigh molecular weight components, whereby the polymer of the present application can be used in the manufacture of a heating pipe requiring excellent long-term durability.

Method for predicting long-term durability of resin composition for piping and olefinic polymer used for resin for piping

The present invention relates to a hybrid supported metallocene catalyst and a polyolefin preparation method using the same. Using the hybrid supported metallocene catalyst can not only significantly reduce the amount of wax produced when polymerizing olefin monomers, but can also enhance the stress cracking resistance of the polyolefin that is prepared.

Hybrid supported metallocene catalyst and polyolefin preparation method using same

The present invention relates to a method for predicting the physical properties of polymers. More specifically, the present invention relates to a method for predicting the processability of polymers using a molecular weight distribution curve.

Method for predicting physical properties of polymers

The present disclosure relates to an assessment method for a polyethylene resin, and more specifically to a new assessment method for a polyethylene resin which can accurately determine long-term durability of a molded article by using physical properties that are easily measurable in a short time.

Assessment method for polyethylene resin

The present invention relates to a method for predicting the physical properties of polymers. More specifically, the present invention relates to a method for predicting long-term stability of polymers using a molecular weight distribution curve.

Provided is an olefin-based polymer with excellent processability. The olefin-based polymer according to the present invention has a high molecular weight and a broad molecular weight distribution to show excellent processability and improved mechanical properties, thereby being usefully applied according to the intended use.

Olefin-based polymer with excellent processability

The present invention relates to an ethylene/alpha-olefin copolymer having excellent processability. The ethylene/alpha-olefin copolymer according to the present invention has low complex viscosity at high shear rate and has excellent processability, and thus it could be applied to the processing of a large diameter pipe, a complex pipe or the like.

Ethylene/alpha-olefin copolymers having excellent processability

The present invention relates to an ethylene/1-hexene or ethylene/1-butene copolymer having excellent processibility. The ethylene/1-hexene or ethylene/1-butene copolymer according to the present invention has high molecular weight and wide molecular weight distribution, and thus excellent processibility, and has excellent environmental stress crack resistance, and thus, may be applied for a high inner pressure heating pipe, a mining pipe, or a large-diameter pipe, and the like.

Ethylene/1-hexene or ethylene/1-butene copolymer having excellent processibility and environmetal stress crack resistance

Disclosed herein is a structural member comprising an elongated hollow thin metal shell and a filler moulded into the hollow thin metal shell. A reinforcing end piece is engaged with an end portion of the shell and is embedded in the filler in order to prevent the end portion of the shell from deforming in the process of injecting the filler into the shell and to prevent the end portions of the structural member from rupturing or breaking during transportation or construction thereof. In addition, the reinforcing end piece includes an inner wall in contact with an inner surface of the end portion of the shell, an outer wall spaced from the inner wall and in contact with an outer surface of the end portion, and a recessed portion provided between the inner and the outer walls for receiving the end portion of the shell.

Structural member with a metal shell

A structural member comprises an elongated hollow thin metal shell and a concrete filler moulded into the hollow thin metal shell. A pair of reinforcing end pieces is engaged in both ends of the shell and is embedded in the concrete filler in order to prevent both ends of the shell from deforming in the process of injecting concrete mortar into the shell and to prevent both end portions of the structural member from rupturing or breaking during transportation or construction thereof.

Growing community of inventors

Daejeon, South Korea

Joong Soo Kim