# US 2014/0197977 A1 · Methods and compositions for destructive interference > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0197977 A1 - Document ID: US20140197977A1 - Status: Published application - Kind: A1 - Application number: 13/739,540 - Filed: 2013-01-11 - Published: 2014-07-17 - Earliest claimed: 2013-01-11 - Assignees: Sabic Innovative Plastics IP B.V. - Applicants: Sabic Innovative Plastics IP B.V. - Inventors: Davide Louis Simone; Gary Stephen Balch; David Alexander Gibson, III; Harold Jay Patchen; Allen Lawrence Garner; Gregory John Parker; Daniel Qi Tan; Francis Johnson - Web page: https://patentgrep.com/patent/US20140197977A1 ## CPC - H01Q 15/14: Reflecting surfaces; Equivalent structures {(electromagnetic shields H01Q1/526)} - C08K 3/04: Carbon - C08K 3/041: {Carbon nanotubes} - C08K 3/042: {Graphene or derivatives, e.g. graphene oxides} - C08K 3/08: Metals - C08K 7/24: inorganic - C08L 55/02: ABS [Acrylonitrile-Butadiene-Styrene] polymers - C08L 65/00: Compositions of macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain (C08L7/00 - C08L57/00, C08L61/00 take precedence); Compositions of derivatives of such polymers - C09D 151/02: grafted on to polysaccharides - C09J 151/02: grafted on to polysaccharides - H01B 1/22: the conductive material comprising metals or alloys - H01B 3/004: {with conductive additives or conductive layers} - H01Q 17/002: {using short elongated elements as dissipative material, e.g. metallic threads or flake-like particles} - C08G 2261/3221: containing one or more nitrogen atoms as the only heteroatom, e.g. pyrrole, pyridine or triazole - C08G 2261/51: Charge transport - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - 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) - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - 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}) - C08G: MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS ## Abstract A composition for destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz can comprise a dielectric and a conductive filler mixed with at least a portion of the dielectric, wherein the percentage volume of the conductive filler relative to the total volume of the composition is configured such that the wavelength of sensitivity for the composition is on the order of a wavelength of an incident electromagnetic radiation in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ## Claims ### Claim 1 A composition for destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz, the composition comprising: a dielectric; and a conductive filler mixed with at least a portion of the dielectric, wherein the percentage volume of the conductive filler relative to the total volume of the composition is configured such that the wavelength of sensitivity for the composition is on the order of a wavelength of an incident electromagnetic radiation in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 2 (depends on 1) The composition of claim 1, wherein the dielectric comprises a thermoplastic polymer. ### Claim 3 (depends on 1) The composition of claim 1, wherein the dielectric comprises acrylonitrile butadiene styrene. ### Claim 4 (depends on 1) The composition of claim 1, wherein the conductive filler comprises a lossy filler. ### Claim 5 (depends on 1) The composition of claim 1, wherein the conductive filler comprises graphene, polypyrrole, stainless steel, carbonyl iron, or multi-walled carbon nano tube, or a mixture thereof. ### Claim 6 (depends on 1) The composition of claim 1, wherein the percentage volume of the conductive filler relative to the total volume of the composition is from about 1.8% to about 50%. ### Claim 7 (depends on 1) The composition of claim 1, wherein the percentage volume of the conductive filler relative to the total volume of the composition is from about 5% to about 30%. ### Claim 8 (depends on 1) The composition of claim 1, wherein the percentage volume of the conductive filler relative to the total volume of the composition is from about 15% to about 20%. ### Claim 9 (depends on 1) The composition of claim 1, wherein the thickness of the composition measured from an incident surface is on the order of the wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 10 (depends on 1) A method of increasing destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz, the method comprising: providing the composition of claim 1; and receiving, at the composition, incident electromagnetic radiation in at least a portion of the frequency range from about 1 GHz to about 20 GHz, wherein a reflective wave of electromagnetic radiation is generated in response to receiving the incident electromagnetic radiation, and wherein the reflective wave facilitates destructive interference of incoming electromagnetic radiation. ### Claim 11 A composition for destructive interference in at least a portion of the frequency range of from about 1 GHz to about 20 GHz, the composition comprising: a dielectric; and a conductive filler mixed with at least a portion of the dielectric, wherein the thickness of the composition measured from an incident surface is on the order of a wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 12 (depends on 11) The composition of claim 11, wherein the dielectric comprises a thermoplastic polymer. ### Claim 13 (depends on 11) The composition of claim 11, wherein the dielectric comprises acrylonitrile butadiene styrene. ### Claim 14 (depends on 11) The composition of claim 11, wherein the conductive filler comprises a lossy filler. ### Claim 15 (depends on 11) The composition of claim 11, wherein the conductive filler comprises graphene, polypyrrole, stainless steel, carbonyl iron, or multi-walled carbon nano tube, or a mixture thereof. ### Claim 16 (depends on 11) The composition of claim 11, wherein the percentage volume of the conductive filler relative to the total volume of the composition that is from about 1.8% to about 50%. ### Claim 17 (depends on 11) The composition of claim 11, wherein the percentage volume of the conductive filler relative to the total volume of the composition that is from about 5% to about 30%. ### Claim 18 (depends on 11) The composition of claim 11, wherein the percentage volume of the conductive filler relative to the total volume of the composition that is from about 15% to about 20%. ### Claim 19 (depends on 11) The composition of claim 11, wherein the thickness of the composition measured from an incident surface is about half of the wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 20 (depends on 11) The composition of claim 11, wherein the thickness of the composition measured from an incident surface is a fraction of the wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 21 (depends on 11) A method of increasing destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz, the method comprising: providing the composition of claim 11; and receiving, at the composition, incident electromagnetic radiation in at least a portion of the frequency range from about 1 GHz to about 20 GHz, wherein a reflective wave of electromagnetic radiation is generated in response to receiving the incident electromagnetic radiation, and wherein the reflective wave facilitates destructive interference of incoming electromagnetic radiation. ### Claim 22 A composition for destructive interference in at least a portion of the frequency range from about 1 GHz to about 20 GHz, the composition comprising: a dielectric; and a conductive filler mixed with at least a portion of the dielectric, wherein the percentage volume of the conductive filler relative to the total volume of the composition is configured such that a reflective wave of electromagnetic radiation is generated in response to receiving an incident wave of electromagnetic radiation, the reflective wave having a wavelength on the order of a wavelength of the incident wave of electromagnetic radiation. ### Claim 23 (depends on 22) The composition of claim 22, wherein the thickness of the composition measured from an incident surface is on the order of a wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 24 (depends on 22) The composition of claim 22, wherein the thickness of the composition measured from an incident surface is a fraction of the wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz. ### Claim 25 (depends on 22) The composition of claim 22, wherein the thickness of the composition measured from an incident surface is about half of the wavelength of sensitivity of the composition in at least a portion of the frequency range from about 1 GHz to about 20 GHz.