# US 2017/0287584 A1 · Electroconductive resin composition and molded product thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0287584 A1 - Document ID: US20170287584A1 - Status: Published application - Kind: A1 - Application number: 15/472,440 - Filed: 2017-03-29 - Published: 2017-10-05 - Earliest claimed: 2016-03-30 - Assignees: Korea Kumho Petrochemical Co., Ltd. - Applicants: Korea Kumho Petrochemical Co., Ltd. - Inventors: Ho Soo HWANG; Wan Sung Lee - Web page: https://patentgrep.com/patent/US20170287584A1 ## CPC - H01B 1/04: mainly consisting of carbon-silicon compounds, carbon or silicon - C08K 3/04: Carbon - C08K 3/041: {Carbon nanotubes} - C08L 9/06: Copolymers with styrene - B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites - B82Y 40/00: Manufacture or treatment of nanostructures - C08K 2201/003: Additives being defined by their diameter - C08K 2201/004: Additives being defined by their length - Y10S 977/752: Multi-walled - Y10S 977/753: with polymeric or organic binder - Y10S 977/842: for carbon nanotubes or fullerenes - Y10S 977/932: for electronic or optoelectronic application - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract An electroconductive resin composition and a molded product thereof. The electroconductive resin includes 100 parts by weight of a thermoplastic polymer resin; 0.5 to 5 parts by weight of a carbon nanotube aggregate formed of a plurality of carbon nanotubes having an average outer diameter of 8 to 50 nm and an average inner diameter that is 40% or more of the average outer diameter; and 5 to 15 parts by weight of carbon black. ## Claims ### Claim 1 An electroconductive resin composition, comprising: 100 parts by weight of a thermoplastic polymer resin; 0.5 to 5 parts by weight of a carbon nanotube aggregate formed of a plurality of carbon nanotubes having an average outer diameter of 8 to 50 nm and an average inner diameter that is 40% or more of the average outer diameter; and 5 to 15 parts by weight of carbon black. ### Claim 2 (depends on 1) The electroconductive resin composition of claim 1, wherein a Raman spectroscopy intensity ratio (IG/ID) of the plurality of carbon nanotubes is 1.0 or more. ### Claim 3 (depends on 1) The electroconductive resin composition of claim 1, wherein a carbon purity of the plurality of carbon nanotubes is 95% or more. ### Claim 4 (depends on 1) The electroconductive resin composition of claim 1, wherein an average bundle diameter of the carbon nanotube aggregate is in a range of 1 to 10 μm. ### Claim 5 (depends on 4) The electroconductive resin composition of claim 4, wherein an average bundle length of the carbon nanotube aggregate is in a range of 10 to 100 μm. ### Claim 6 (depends on 1) The electroconductive resin composition of claim 1, wherein the thermoplastic polymer resin comprises a first styrene-butadiene copolymer having an average particle diameter of 1 to 5 μm. ### Claim 7 (depends on 6) The electroconductive resin composition of claim 6, wherein the thermoplastic polymer resin further comprises a second styrene-butadiene copolymer having an average particle diameter of 0.1 to 1 μm. ### Claim 8 (depends on 7) The electroconductive resin composition of claim 7, wherein a content of the second styrene-butadiene copolymer is in a range of 10 to 50 wt % based on a total weight of the thermoplastic polymer resin. ### Claim 9 (depends on 1) The electroconductive resin composition of claim 1, wherein the electroconductive resin composition further comprises 1 to 15 parts by weight of a rubber component. ### Claim 10 (depends on 9) The electroconductive resin composition of claim 9, wherein the rubber component comprises one or more rubbers selected from the group consisting of butadiene rubber, isoprene rubber, styrene-butadiene-styrene rubber, styrene-isoprene-styrene rubber, acrylonitrile-butadiene rubber, styrene-butadiene rubber, and ethylene-propylene rubber. ### Claim 11 (depends on 1) The electroconductive resin composition of claim 1, wherein the thermoplastic polymer resin further comprises polystyrene. ### Claim 12 (depends on 11) The electroconductive resin composition of claim 11, wherein a content of the polystyrene is in a range of 5 to 20 wt % based on a total weight of the thermoplastic polymer resin. ### Claim 13 (depends on 11) The electroconductive resin composition of claim 11, wherein a tensile strength of the polystyrene is in a range of 400 to 600 kgf/cm2. ### Claim 14 (depends on 11) The electroconductive resin composition of claim 11, wherein a flexural strength of the polystyrene is in a range of 800 to 1,000 kgf/cm2. ### Claim 15 (depends on 1) A molded product produced using the electroconductive resin composition of claim 1. ### Claim 16 (depends on 15) The molded product of claim 15, wherein a surface resistance of the molded product is in a range of 104 to 108 Ω/sq. ### Claim 17 (depends on 15) The molded product of claim 15, wherein a specific gravity of the molded product is in a range of 1.0 to 1.1. ### Claim 18 (depends on 15) The molded product of claim 15, wherein the molded product is a tape reel.