Global Patent Index - EP 4058405 A4

EP 4058405 A4 20231129 - ELECTROMAGNETIC INTERFERENCE SHIELDING COMPOSITION, ARTICLE AND METHODS THEREOF

Title (en)

ELECTROMAGNETIC INTERFERENCE SHIELDING COMPOSITION, ARTICLE AND METHODS THEREOF

Title (de)

ELEKTROMAGNETISCHE INTERFERENZABSCHIRMENDE ZUSAMMENSETZUNG, GEGENSTAND UND VERFAHREN DAFÜR

Title (fr)

COMPOSITION DE PROTECTION CONTRE LES INTERFÉRENCES ÉLECTROMAGNÉTIQUES, ARTICLE ET PROCÉDÉS ASSOCIÉS

Publication

EP 4058405 A4 20231129 (EN)

Application

EP 20887102 A 20200103

Priority

  • IN 201911046464 A 20191114
  • IB 2020050030 W 20200103

Abstract (en)

[origin: WO2021094836A1] The present disclosure relates to the field of polymer engineering, applied industrial technology and electromagnetic interference (EMI) shielding materials. Particularly, the present disclosure relates to a low-density EMI shielding composition comprising soft elastomer, conductive nanostructure and metal ferrite doped reduced graphene oxide (RGO) and method of preparing the composition. The composition of the present disclosure is useful for manufacturing EMI shielding articles such as coating, adhesive, sheet, absorber, gasket, Microwave Absorbing Material, Radar Absorbing Material, soft electromagnetic interference shielding material, etc. The present disclosure also relates to articles comprising the composition and methods of obtaining the same.

IPC 8 full level

C01B 32/158 (2017.01); B82Y 30/00 (2011.01); C01B 32/198 (2017.01); C08G 77/04 (2006.01); C08K 3/04 (2006.01); C08K 3/22 (2006.01); C08L 83/04 (2006.01); H05K 9/00 (2006.01)

CPC (source: EP)

C01B 32/158 (2017.07); C01B 32/198 (2017.07); C08K 3/042 (2017.04); C08K 3/22 (2013.01); C08L 83/04 (2013.01); H05K 9/0083 (2013.01); B82Y 30/00 (2013.01); C08G 77/04 (2013.01)

Citation (search report)

  • [IY] YADAV RAGHVENDRA SINGH ET AL: "Lightweight NiFe2O4-Reduced Graphene Oxide-Elastomer Nanocomposite flexible sheet for electromagnetic interference shielding application", COMPOSITES PART B, vol. 166, 1 June 2019 (2019-06-01), AMSTERDAM, NL, pages 95 - 111, XP055823689, ISSN: 1359-8368, DOI: 10.1016/j.compositesb.2018.11.069
  • [Y] YANG JIANMING ET AL: "Light-weight and flexible silicone rubber/MWCNTs/Fe3O4 nanocomposite foams for efficient electromagnetic interference shielding and microwave absorption", COMPOSITES SCIENCE AND TECHNOLOGY, ELSEVIER, AMSTERDAM, NL, vol. 181, 8 September 2019 (2019-09-08), XP085730972, ISSN: 0266-3538, [retrieved on 20190531], DOI: 10.1016/J.COMPSCITECH.2019.05.027
  • [A] CHEN CHUN-YU ET AL: "Remarkable microwave absorption performance of graphene at a very low loading ratio", COMPOSITES PART B, ELSEVIER, AMSTERDAM, NL, vol. 114, 16 February 2017 (2017-02-16), pages 395 - 403, XP029986059, ISSN: 1359-8368, DOI: 10.1016/J.COMPOSITESB.2017.02.016
  • [A] GUPTA SHIVAM ET AL: "Carbon materials and their composites for electromagnetic interference shielding effectiveness in X-band", CARBON, ELSEVIER OXFORD, GB, vol. 152, 3 June 2019 (2019-06-03), pages 159 - 187, XP085769546, ISSN: 0008-6223, [retrieved on 20190603], DOI: 10.1016/J.CARBON.2019.06.002
  • See references of WO 2021094836A1

Designated contracting state (EPC)

AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DOCDB simple family (publication)

WO 2021094836 A1 20210520; EP 4058405 A1 20220921; EP 4058405 A4 20231129

DOCDB simple family (application)

IB 2020050030 W 20200103; EP 20887102 A 20200103