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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 11993695 B1

PDFFull Text
Date of Patent:
May. 28, 2024

Filed:

Nov. 14, 2019

Thermoplastic resin composition having excellent heat resistance and electromagnetic wave shielding capacity, method of preparing thermoplastic resin composition, and injection-molded article manufactured using thermoplastic resin composition

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Gi Dae Choi, Daejeon, KR;

Youngjoo Kim, Daejeon, KR;

Eon Seok Lee, Daejeon, KR;

Changhun Yun, Daejeon, KR;

Minsu Kim, Daejeon, KR;

Assignee:

LG Chem, Ltd., Seoul, KR;

Attorney:

Bryan Cave Leighton Paisner LLP

Primary Examiner:

Kregg T Brooks

Assistant Examiner:

David R Foss

Int. Cl.
CPC ...
C08K 3/04 (2006.01); B29C 48/00 (2019.01); B29C 48/40 (2019.01); B29C 48/92 (2019.01); C08K 3/08 (2006.01); C08K 7/06 (2006.01); C08L 101/00 (2006.01); H05K 9/00 (2006.01); B29K 301/12 (2006.01);
U.S. Cl.
CPC ...
C08K 3/046 (2017.05); B29C 48/0022 (2019.02); B29C 48/40 (2019.02); B29C 48/92 (2019.02); C08K 3/08 (2013.01); C08K 7/06 (2013.01); C08L 101/00 (2013.01); H05K 9/009 (2013.01); B29C 2948/92704 (2019.02); B29C 2948/92885 (2019.02); B29K 2301/12 (2013.01); B29K 2995/0011 (2013.01); C08K 2003/0843 (2013.01); C08K 2003/0856 (2013.01); C08K 2003/0862 (2013.01); C08K 2201/001 (2013.01); C08K 2201/003 (2013.01); C08K 2201/006 (2013.01); C08K 2201/01 (2013.01); C08K 2201/011 (2013.01);
Abstract

Provided is a thermoplastic resin composition, including (a) 100 parts by weight of a thermoplastic resin including 80-100% by weight of a base resin and 0-20% by weight of a reinforcing resin; (b) 2-60 parts by weight of linear carbon fibers having an average diameter of 1-15 μm; (c) 1-5 parts by weight of carbon nanofibrils having a BET specific surface area of 200-400 m/g; (d) 1-15 parts by weight of carbon nanoplates; and (e) 1-25 parts by weight of metal powder, a method of preparing the thermoplastic resin composition, and an injection-molded article manufactured using the thermoplastic resin composition. The thermoplastic resin composition has excellent mechanical properties, e.g., impact strength, and also excellent conductivity, heat resistance, and electromagnetic wave shielding capacity, particularly high shielding efficiency against high-frequency electromagnetic waves, and thus can be used as automobile, electric, and electronic parts, and as a substitute for aluminum alloys and magnesium alloys.

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