GB978606A - An electrically conductive plastic mass containing a metallic filler and process for preparing said filler - Google Patents

An electrically conductive plastic mass containing a metallic filler and process for preparing said filler

Info

Publication number
GB978606A
GB978606A GB2426162A GB2426162A GB978606A GB 978606 A GB978606 A GB 978606A GB 2426162 A GB2426162 A GB 2426162A GB 2426162 A GB2426162 A GB 2426162A GB 978606 A GB978606 A GB 978606A
Authority
GB
Grant status
Application
Patent type
Prior art keywords
silver
copper
parts
powder
coated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2426162A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chomerics Inc
Original Assignee
Chomerics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date

Links

Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • H01B1/20Conductive material dispersed in non-conductive organic material
    • H01B1/22Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUSE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES AS COMPOUNDING INGREDIENTS
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/08Metals

Abstract

An electrically conductive plastic mass comprises a plastic matrix holding in electrical particle to particle contact a metal filler comprising a finely divided conductive metal powder having a solid core of copper or iron coated with copper, and a continuous film of silver thereon. The metal powder is preferably 3.5-350 microns in size and at least 20% by volume of the metal powder is incorporated in the plastic matrix which may be thermosetting or thermoplastic resins and elastomers such as asphalts, polyvinyl chlorides, polyurethanes, epoxies, polyamides, acrylate and natural rubber. Other fillers such as asbestos, bentonite, pigments, silica, alumina, titania and zinc oxide may also be incorporated in the plastic matrix. Examples of the following compositions are given: (a) 11 parts by weight of diglycidyl ether of bisphenol A and 89 parts silver coated copper powder mixed with 11 parts of a polyamide and 89 parts of silver coated copper powder. (b) 89 parts of silver coated copper powder and 11 parts of polyvinyl chloride plastisol with a curing temperature of 330 DEG F. (c) 80 parts of copper coated iron powder coated with silver and 20 parts of polyvinyl chloride plastisol.ALSO:A powder metal filler for incorporation in a plastic matrix is produced by a replacement plating process in which copper particles are continuously agitated in a silver plating solution containing 2-10 ozs./gallon silver ions and 8-22 ozs./gallons cyanide ions. Alternatively iron powder may be replacement plated with copper from a copper sulphate solution followed by replacement plating with silver from a solution containing 3-8 ozs./gallon silver ions and 6-20 ozs./gallon cyanide ions, the gm. moles of copper deposited. A film of gold may be formed on the silver coating and the coated particles may be ball milled or fluxed and fused to consolidate the silver film. The preferred size of the metal powder is 3.5-350 microns and an electrically conducting plastic mass is made by incorporating at least 20% by volume of the metal filler in a plastic matrix such as thermosetting or thermoplastic resins and elastomers. Examples of the matrix materials are asphalts, polyvinyl chlorides, polyurethanes, epoxies, polyesters, polyamides, acrylates and natural rubber.ALSO:A conductive plastic composition comprising 89 parts by weight of a powder having a core of copper or copper coated iron and an outer coating of silver (see Division C7) and 11 parts by weight of polyvinyl chloride plastisol is spread on to a 30 mesh 10 mil aluminium wire screen and cured. The reinforced sheet is then rolled to form electrically conductive gaskets for sealing microwave flanges.
GB2426162A 1961-11-17 1962-11-09 An electrically conductive plastic mass containing a metallic filler and process for preparing said filler Expired GB978606A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US15307861 true 1961-11-17 1961-11-17
US22775662 true 1962-10-02 1962-10-02
US22794462 true 1962-10-02 1962-10-02
US22775562 true 1962-10-02 1962-10-02
US3194860A US3194860A (en) 1962-10-02 1962-10-23 Manufacture of reinforced conductive plastic gaskets
US29297863 true 1963-07-05 1963-07-05

Publications (1)

Publication Number Publication Date
GB978606A true true GB978606A (en) 1964-12-23

Family

ID=27558412

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2426162A Expired GB978606A (en) 1961-11-17 1962-11-09 An electrically conductive plastic mass containing a metallic filler and process for preparing said filler

Country Status (1)

Country Link
GB (1) GB978606A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652465A (en) * 1984-05-14 1987-03-24 Nissan Chemical Industries Ltd. Process for the production of a silver coated copper powder and conductive coating composition
EP0241927A1 (en) * 1986-04-18 1987-10-21 Herberts Gesellschaft mit beschränkter Haftung Highly electrically conductive coating material, and its use in manufacturing coatings
US4968854A (en) * 1988-11-10 1990-11-06 Vanguard Products Corporation Dual elastomer gasket shield for electronic equipment
FR2826497A1 (en) * 2001-06-20 2002-12-27 Ge Med Sys Global Tech Co Llc coating element for electric high voltage connection

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4652465A (en) * 1984-05-14 1987-03-24 Nissan Chemical Industries Ltd. Process for the production of a silver coated copper powder and conductive coating composition
EP0241927A1 (en) * 1986-04-18 1987-10-21 Herberts Gesellschaft mit beschränkter Haftung Highly electrically conductive coating material, and its use in manufacturing coatings
US4968854A (en) * 1988-11-10 1990-11-06 Vanguard Products Corporation Dual elastomer gasket shield for electronic equipment
FR2826497A1 (en) * 2001-06-20 2002-12-27 Ge Med Sys Global Tech Co Llc coating element for electric high voltage connection
EP1271562A1 (en) * 2001-06-20 2003-01-02 GE Medical Systems Global Technology Company LLC Coating element for an electrical junction or circuit and method of reducing surface electric field density of an electrical junction or circuit using such a coating element
US6733308B2 (en) 2001-06-20 2004-05-11 Ge Medical Systems Global Technology Company Llc Coating element for an electrical junction and method

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