US3903328A - Conductive coating - Google Patents

Conductive coating Download PDF

Info

Publication number
US3903328A
US3903328A US464419A US46441974A US3903328A US 3903328 A US3903328 A US 3903328A US 464419 A US464419 A US 464419A US 46441974 A US46441974 A US 46441974A US 3903328 A US3903328 A US 3903328A
Authority
US
United States
Prior art keywords
coating
pigmented
copper
graphite
process according
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 - Lifetime
Application number
US464419A
Other languages
English (en)
Inventor
Jr Ernest Russell Burdette
David Downing Dean
William Lunsford Mitchell
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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
Application filed by International Business Machines Corp filed Critical International Business Machines Corp
Priority to US464419A priority Critical patent/US3903328A/en
Priority to DE2460482A priority patent/DE2460482C3/de
Priority to GB309675A priority patent/GB1439126A/en
Priority to IT20106/75A priority patent/IT1031596B/it
Priority to FR7507778A priority patent/FR2279829A1/fr
Priority to CA222,323A priority patent/CA1032418A/en
Priority to JP3125875A priority patent/JPS5534966B2/ja
Application granted granted Critical
Publication of US3903328A publication Critical patent/US3903328A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/50—Multilayers
    • B05D7/52—Two layers
    • B05D7/54—No clear coat specified
    • B05D7/544—No clear coat specified the first layer is let to dry at least partially before applying the second layer
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
    • B05D5/12—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain a coating with specific electrical properties

Definitions

  • ABSTRACT A process of applying a conductive coating to an article to provide electromagnetic and electrostatic energy shielding and grounding.
  • the article is first coated with a sufficient amount of a metallic copper pigmented resin to provide a pigment particle to particle contact upon drying.
  • a synergistic effect is obtained by then coating the copper pigment with a graphite pigmented resin.
  • a sufficient amount of graphite pigmented resin is used to prevent oxidation of the copper pigment and enhance electrical conductivity.
  • a conductive coating is applied to an article for providing an electromagnetic energy shield, and electrostatic grounding, through essentially a two step coating process.
  • the article is first coated with a sufficient amount of a metallic copper pigment dispersed in a thermoplastic resin binder to provide a pigment particle to particle contact upon drying.
  • the copper pigment coating is coated with a sufficient amount of conductive graphite, made up of a graphite pigment dispersed in a resin, to prevent oxidation of the copper coating and enhance electrical conductivity.
  • the interior of a machine housing which is to include electrical and electronic apparatus is provided with a conductive coating for electromagnetic and electrostatic energy shielding and grounding purposes.
  • the housing can be made up of any moldable polymeric material such as a modified polyphenylene oxide, polyolefin, polyamide, polyvinyl chloride, etc., capable of storing a static charge.
  • a metallic copper pigmented thermoplastic resin through conventional spray painting techniques related to heavily pigmented paints.
  • This first coating is then allowed to dry, or is dryed through application of heat.
  • a conductive graphite coating made up of a graphite pigmented water-dispersed resin is applied to the first coating.
  • This second coating will elimi nate oxidation of the copper and enhance the electrical conductivity of the coating as a whole. That is, a synergistic effect is provided through the coating of the machine housing with both a copper and a graphite material.
  • EXAMPLE I The interior of a machine cover made up of Noryl (a moldable modified polyphenylene oxide marketed by General Electric Company) and molded into a console cover for an IBM Mag Card II was first cleaned with a solvent to remove contamination such as mold releases and dirt. To the cleaned and dryed interior surface was applied, through spray painting techniques, an Electrodag 435 (marketed by Acheson Colloids Company, Port Huron, Mich.) copper conductive coating diluted one to one with a commercial grade lacquer thinner. This first coating was applied in a sufficient amount to provide a 3 mil dried thickness and was then allowed to dry. The drying time to touch at ambient temperature is three to five minutes and can be overcoated in 15 minutes.
  • Noryl a moldable modified polyphenylene oxide marketed by General Electric Company
  • IBM Mag Card II To the cleaned and dryed interior surface was applied, through spray painting techniques, an Electrodag 435 (marketed by Acheson Colloids Company, Port Huron, Mich.) copper conductive coating diluted one to one with a commercial grade
  • composition obtained through various analysis techniques, in terms of percent solids and percent solvent of the copper conductive wet coating diluted one to one with a commercial grade lacquer thinner (such as AL-IOO, marketed by Austin Lacquer Company, Austin, Texas) is as follows:
  • Binder Composition Thermoplastic ethyl cellulose resin.
  • Electrodag ES 3376 (marketed by Acheson Colloids Company) coating which is a graphite pigmented water-dispersed resin.
  • the composition of the Electrodag ES337G is set out below.
  • Binder Composition Vinyl acetate resin which upon drying and curing is a homopolymer of polyvinyl acetate.
  • the above coated housing provided good shielding from electromagnetic energy such as radar and other frequency radiation. It also provided good electrical continuity for discharge of electrostatic energy to ground.
  • EXAMPLE 2 A first coating of metallic copper pigment was applied as set out in Example 1. Within two to three days, electrical continuity became noticeably diminished due to oxidation of the copper. Good electromagnetic shielding was maintained though. Thus, the copper pigment alone would not maintain sufficient electrical conductivity for discharge of electrostatic energy over a desired time interval. Further, the copper coating when used alone had a tendency to flake. This flaking had an adverse effect on the card reading mechanism in the IBM Mag Card ll Console.
  • EXAMPLE 4 The two coating process referred to in Example 1 provided greater electromagnetic shielding and electrostatic grounding qualities than the sum of the one coating processes of Examples 2 and 3 over a desired useful life.
  • a conductive coating is applied to an article for providing electromagnetic and electrostatic energy shielding and grounding through essentially a two step coating process.
  • the article is first coated with a sufficient amount of a metallic copper pigment dispersed in a thermoplastic resin binder to provide a pigment particle to particle contact upon drying.
  • the copper pigment coating is coated with a sufficicnt amount of conductive graphite, made up of a graphite pigment dispersed in a resin, to prevent oxidation of the copper coating and enhance electrical conductivity.
  • a process of applying a conductive coating to an article comprising:
  • said copper pigmented resin contains within the range of from about 25 to 40% by weight metallic copper pigment.
  • thermoplastic resin is ethyl cellulose.
  • a process of applying a conductive coating to an article for electromagnetic shielding electrostatic grounding purposes comprising:
  • thermoplastic resin is ethyl cellulose.
  • a process according to claim 10 wherein said water-dispersed resin is comprised of vinyl acetate.
  • said copper pigmented resin contains within the range of from about 5 to 15% by weight thermoplastic resin binder.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paints Or Removers (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Conductive Materials (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
US464419A 1974-04-26 1974-04-26 Conductive coating Expired - Lifetime US3903328A (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US464419A US3903328A (en) 1974-04-26 1974-04-26 Conductive coating
DE2460482A DE2460482C3 (de) 1974-04-26 1974-12-20 Verfahren zum Herstellen eines leitenden Überzugs
GB309675A GB1439126A (en) 1974-04-26 1975-01-24 Conductive coating
IT20106/75A IT1031596B (it) 1974-04-26 1975-02-11 Processo per applicare un rivestimento conduttivo ad un articolo in particolare per ottenerela dispersione verso massa e laschermatura di cariche elettrostatiche ed elettromagnetiche
FR7507778A FR2279829A1 (fr) 1974-04-26 1975-03-06 Procede d'application d'un revetement conducteur
CA222,323A CA1032418A (en) 1974-04-26 1975-03-14 Conductive coating
JP3125875A JPS5534966B2 (Direct) 1974-04-26 1975-03-17

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US464419A US3903328A (en) 1974-04-26 1974-04-26 Conductive coating

Publications (1)

Publication Number Publication Date
US3903328A true US3903328A (en) 1975-09-02

Family

ID=23843873

Family Applications (1)

Application Number Title Priority Date Filing Date
US464419A Expired - Lifetime US3903328A (en) 1974-04-26 1974-04-26 Conductive coating

Country Status (7)

Country Link
US (1) US3903328A (Direct)
JP (1) JPS5534966B2 (Direct)
CA (1) CA1032418A (Direct)
DE (1) DE2460482C3 (Direct)
FR (1) FR2279829A1 (Direct)
GB (1) GB1439126A (Direct)
IT (1) IT1031596B (Direct)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243460A (en) * 1978-08-15 1981-01-06 Lundy Electronics & Systems, Inc. Conductive laminate and method of producing the same
US4698197A (en) * 1985-02-12 1987-10-06 The United States Of America As Represented By The United States Department Of Energy Magnetic shielding
US5416668A (en) * 1993-11-09 1995-05-16 At&T Corp. Shielded member
US5705219A (en) * 1991-04-22 1998-01-06 Atotech Deutschland Gmbh Method for coating surfaces with finely particulate materials
EP1800764A1 (de) * 2005-12-20 2007-06-27 Sgl Carbon Ag Verfahren zur Beschichtung von Graphitfolie
EP1800763A1 (de) * 2005-12-20 2007-06-27 Sgl Carbon Ag Verfahren zur Beschichtung von Graphitfolie
US20090120316A1 (en) * 2007-11-13 2009-05-14 Denome Frank William Process for creating a unit dose product with a printed water soluble material
US20090123679A1 (en) * 2007-11-13 2009-05-14 Denome Frank William Printed water soluble film with desired dissolution properties
US20100294153A1 (en) * 2009-05-19 2010-11-25 Stephane Content Method for printing water-soluble film
US20130266795A1 (en) * 2012-03-20 2013-10-10 Seashell Technology, Llc Mixtures, Methods and Compositions Pertaining To Conductive Materials
WO2015148489A3 (en) * 2014-03-24 2016-01-28 Apple Inc. Magnetic shielding in inductive power transfer

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2831791C2 (de) 1978-07-19 1982-09-09 Gkss - Forschungszentrum Geesthacht Gmbh, 2000 Hamburg Bauteil aus metallischem Werkstoff mit aufladungsgefährdeter Oberfläche und Verwendung hierfür
US4404125A (en) * 1981-10-14 1983-09-13 General Electric Company Polyphenylene ether resin compositions for EMI electromagnetic interference shielding
US4508640A (en) * 1981-11-24 1985-04-02 Showa Denko Kabushiki Kaisha Electromagnetic wave-shielding materials
AT386720B (de) * 1986-05-27 1988-10-10 Alcatel Austria Ag Abgeschirmtes gehaeuse

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134870A (en) * 1936-03-14 1938-11-01 Mallory & Co Inc P R Resistance element
US2781277A (en) * 1954-01-12 1957-02-12 Sanders Associates Inc Method of manufacturing electrical resistors
US3006785A (en) * 1958-04-16 1961-10-31 S E C L Societa Elettrotecnica Electric resistors
US3247478A (en) * 1961-03-20 1966-04-19 Aerological Res Inc Electrical hygrometer
US3298896A (en) * 1962-05-23 1967-01-17 Szegvari Andrew Film for receiving, storing or controlling electric impulses
US3779807A (en) * 1971-10-12 1973-12-18 Owens Illinois Inc Process for applying multiple microelectronic layers to substrate
US3783021A (en) * 1969-03-03 1974-01-01 Eastman Kodak Co Conducting lacquers for electrophotographic elements

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH336468A (de) * 1954-11-29 1959-02-28 Philips Nv Verfahren zur Herstellung einer leitenden Graphitschicht auf einer isolierenden Unterlage
GB1145450A (en) * 1966-04-08 1969-03-12 Gen Electric Method of making conductive coatings on the surface of an encapsulated electrical device
GB1266422A (Direct) * 1968-05-23 1972-03-08

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2134870A (en) * 1936-03-14 1938-11-01 Mallory & Co Inc P R Resistance element
US2781277A (en) * 1954-01-12 1957-02-12 Sanders Associates Inc Method of manufacturing electrical resistors
US3006785A (en) * 1958-04-16 1961-10-31 S E C L Societa Elettrotecnica Electric resistors
US3247478A (en) * 1961-03-20 1966-04-19 Aerological Res Inc Electrical hygrometer
US3298896A (en) * 1962-05-23 1967-01-17 Szegvari Andrew Film for receiving, storing or controlling electric impulses
US3783021A (en) * 1969-03-03 1974-01-01 Eastman Kodak Co Conducting lacquers for electrophotographic elements
US3779807A (en) * 1971-10-12 1973-12-18 Owens Illinois Inc Process for applying multiple microelectronic layers to substrate

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4243460A (en) * 1978-08-15 1981-01-06 Lundy Electronics & Systems, Inc. Conductive laminate and method of producing the same
US4698197A (en) * 1985-02-12 1987-10-06 The United States Of America As Represented By The United States Department Of Energy Magnetic shielding
US5705219A (en) * 1991-04-22 1998-01-06 Atotech Deutschland Gmbh Method for coating surfaces with finely particulate materials
US5416668A (en) * 1993-11-09 1995-05-16 At&T Corp. Shielded member
US20070160751A1 (en) * 2005-12-20 2007-07-12 Sgl Carbon Ag Method for coating graphite foil and method for heat dissipation in electronic equipment
EP1800763A1 (de) * 2005-12-20 2007-06-27 Sgl Carbon Ag Verfahren zur Beschichtung von Graphitfolie
US7700162B2 (en) 2005-12-20 2010-04-20 Sgl Carbon Ag Method for coating graphite foil
EP1800764A1 (de) * 2005-12-20 2007-06-27 Sgl Carbon Ag Verfahren zur Beschichtung von Graphitfolie
US20090120316A1 (en) * 2007-11-13 2009-05-14 Denome Frank William Process for creating a unit dose product with a printed water soluble material
US20090123679A1 (en) * 2007-11-13 2009-05-14 Denome Frank William Printed water soluble film with desired dissolution properties
US8087357B2 (en) 2007-11-13 2012-01-03 The Proctor & Gamble Company Process for creating a unit dose product with a printed water soluble material
US9446865B2 (en) 2009-05-19 2016-09-20 The Procter & Gamble Company Method for producing a water-soluble detergent pouch with a graphic printed thereon
US20100294153A1 (en) * 2009-05-19 2010-11-25 Stephane Content Method for printing water-soluble film
US8757062B2 (en) 2009-05-19 2014-06-24 The Procter & Gamble Company Method for printing water-soluble film
US9969154B2 (en) 2009-05-19 2018-05-15 The Procter & Gamble Company Method for printing water-soluble film
US20130266795A1 (en) * 2012-03-20 2013-10-10 Seashell Technology, Llc Mixtures, Methods and Compositions Pertaining To Conductive Materials
US9441117B2 (en) * 2012-03-20 2016-09-13 Basf Se Mixtures, methods and compositions pertaining to conductive materials
US9902863B2 (en) 2012-03-20 2018-02-27 Basf Se Mixtures, methods and compositions pertaining to conductive materials
CN106165036A (zh) * 2014-03-24 2016-11-23 苹果公司 感应电力传输中的磁屏蔽
US9852844B2 (en) 2014-03-24 2017-12-26 Apple Inc. Magnetic shielding in inductive power transfer
WO2015148489A3 (en) * 2014-03-24 2016-01-28 Apple Inc. Magnetic shielding in inductive power transfer
CN109065342A (zh) * 2014-03-24 2018-12-21 苹果公司 感应电力传输中的磁屏蔽
CN106165036B (zh) * 2014-03-24 2019-01-11 苹果公司 感应电力传输中的磁屏蔽
EP3528267A1 (en) * 2014-03-24 2019-08-21 Apple Inc. Magnetic shielding in inductive power transfer

Also Published As

Publication number Publication date
DE2460482A1 (de) 1975-11-20
DE2460482B2 (de) 1981-04-30
FR2279829A1 (fr) 1976-02-20
FR2279829B1 (Direct) 1977-04-15
JPS5534966B2 (Direct) 1980-09-10
DE2460482C3 (de) 1982-01-21
CA1032418A (en) 1978-06-06
IT1031596B (it) 1979-05-10
JPS50139994A (Direct) 1975-11-10
GB1439126A (en) 1976-06-09

Similar Documents

Publication Publication Date Title
US3903328A (en) Conductive coating
US2321587A (en) Electrical conductive coating
US2446387A (en) Shielded cable
JP2718957B2 (ja) 結晶性熱可塑性樹脂成形品の静電塗装方法並びに塗装プラスチックス成形品
US4624865A (en) Electrically conductive microballoons and compositions incorporating same
US3918939A (en) Electrostatic precipitator composed of synthetic resin material
DE1519124A1 (de) Verfahren zur Herstellung elektrisch leitender Schichten auf elektrisch isolierendenOberflaechen
ATE95829T1 (de) Elektrisch leitende beschichtungsmasse, verfahren zu ihrer herstellung und ihre verwendung.
GB2035843A (en) Process for producing an electrically- conducting coating on an at least superficially insulating body and a body with a coating produced by this process
GB655763A (en) Improvements in or relating to the electrophoretic coating of articles of electrically conducting material
Bamji et al. Polymer electrets corona charged at high temperature
US5262207A (en) Method of electrostatically coating nonconductive panels
US3298864A (en) Semi-conducting coating for use in a self-healing alternating voltage capacitor and method
US3830656A (en) Resistor film
US3697303A (en) Process for coating the surface of a material
CN110527428A (zh) 一种镀膜保护油及其使用方法
GB2027363A (en) Process for the Electrostatic Coating of Workpieces
US2956909A (en) Process for producing a conductive layer on heat sensitive dielectric material
US3130067A (en) Process for electrostatically coating nonconductive articles
US4853155A (en) Electrically conductive synthetic resin composition
JPS5579871A (en) Metal covering method for non-conductive substance
US4743476A (en) Method for producing thermoplastic articles having anti-static armor
US3674543A (en) Electrodeposition
JPS5876265A (ja) ポリオレフイン系樹脂成形品に対する塗装用導電性プライマ−
DE2166805C3 (Direct)