Korea Kumho Petrochemical Co., Ltd.

Kwanyoung Lee

Hyun Kyung Sung

Hyun Jung Kim

Young Jin Kim

Jong Hee Kim

Namsun Choi

Hosull Lee

Pil Sung Kim

Jong Mok Kim

Il Sang Maeng

The present invention relates to a ternary copolymer represented by the following formula (1) of the penta-block structure, wherein the molecular weight is 50, 000 to 400,000, pB is more than 70% of 1,4 structure, the content of pS is in range of 5% to 50%, and pB and pI are in a weight ratio of pB/pI&#x2267;1.pS-pI-pB-pI-pS&#x2003;&#x2003;(1) Wherein, pS is vinyl aromatic polymer, pB is polybutadiene and pI is polyisoprene. The block copolymer in the present invention with the structure, in which polyisoprene block is inserted between vinyl aromatic polymer block and polybutadiene block, has high mechanical properties such as tensile strength. The manufacturing method of the ternary block copolymer with penta-block structure is also provided.

Pentablock copolymer and manufacturing method of the same

Styrene copolymer

Cathode including transition metal/matrix polymer composition and a secondary polymer battery therefrom

The present invention relates to a novel sulfurated hydrocarbon material having electrochemical activity, high capacity, and good reversibility, which can be used as an electrode material for the secondary battery. More particularly, it relates to a sulfurated hydrocarbon material, which is prepared by the sulfuration of the olefinic unsaturated hydrocarbon, in the presence of a amine promoter. The sulfurated hydrocarbon material contains from 40 to 88% of sulfur and is represented by the formula (CH S ) , wherein: x is a real number in the range of 0.5&lE;x&lE;1.75; y is a real number in the range of 0.2&lE;y&lE;3.2; and z is an integer equal to or greater than 5. Also, the present invention provides a secondary battery comprising i) a positive electrode comprising said sulfurated hydrocarbon compound; ii) a polymer electrolyte; and iii) a negative electrode made of alkali metal or alkali metal alloy.

Sulfurated hydrocarbon materials having high capacity and secondary cells using the same

This invention relates to a process for polymerizing isobutene using a catalytic system comprising a transition metal compound, a benzene derivative compound, and methylaluminoxane, and the catalytic system applied to the polymerization of isobutene, (1) the added benzene derivative compound and methyl aluminoxane to the transition metal species provides higher stability of cation active site so that polyisobutene with a high molecular weight can be produced even at a higher reaction temperature than the conventional cationic polymerization temperature; (2) nonhalogen solvent such as toluene can be employed as a polymerization solvent instead of halogenated solvents such as methyl chloride; and (3) under the stable catalytic system, a final product with a high yield can be ensured for its long-term use.

Process for producing polyisobutene using a catalytic system comprising transition metal-benzene derivative compound-methylaluminoxane

The present invention relates to an improved secondary battery having high weight energy density and good reversibility, more specifically, a battery containing i) a positive electrode comprising a reversible positive electrode material containing an organosulfur compound wherein sulfur-sulfur bond is formed upon oxidation and sulfur-sulfur bond is cleaved upon electrolytic reduction, an electroactive component selected from main group elements compound, electrically conductive ingredients and a current collector containing copper metal; ii) a polymer electrolyte having lithium salt; and iii) a negative electrode made of lithium metal, lithium alloy or lithium intercalating carbon.

High capacity composite electrode and secondary cell therefrom

The present invention relates to an improved secondary battery having high weight energy density and good reversibility, more specifically, a battery containing i) a positive electrode comprising a reversible positive electrode material containing an organosulfur compound wherein sulfur--sulfur bond is formed upon oxidation and sulfur--sulfur bond is cleaved upon electrolytic reduction, a metallic compound, and a current collector containing copper metal; ii) a polymer electrolyte having lithium salt; and iii) a negative electrode made of lithium metal, lithium alloy or lithium intercalating carbon.

Growing community of inventors

Daejeon, South Korea

Kwanyoung Lee