US3367796A - Pyrolizable enamel coated wire comprising manganese and cobalt chelates - Google Patents

Pyrolizable enamel coated wire comprising manganese and cobalt chelates Download PDF

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US3367796A
US3367796A US618547A US61854766A US3367796A US 3367796 A US3367796 A US 3367796A US 618547 A US618547 A US 618547A US 61854766 A US61854766 A US 61854766A US 3367796 A US3367796 A US 3367796A
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Prior art keywords
enamel
manganese
insulation
conductor
glass
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US618547A
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Harry L Saums
Wesley W Pendleton
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ANAMAG Inc A CORP OF DE
Chase Commercial Corp
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Anaconda Wire and Cable Co
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Priority claimed from US178349A external-priority patent/US3294731A/en
Application filed by Anaconda Wire and Cable Co filed Critical Anaconda Wire and Cable Co
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Assigned to ATLANTIC RICHFIELD COMPANY, A PA CORP. reassignment ATLANTIC RICHFIELD COMPANY, A PA CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANACONDA COMPANY THE, A DE CORP
Assigned to CHASE COMMERCIAL CORPORATION, 5775 F PEACH TREE DUNWOOD ROAD, ATLANTA, GA. 30342, A CORP. reassignment CHASE COMMERCIAL CORPORATION, 5775 F PEACH TREE DUNWOOD ROAD, ATLANTA, GA. 30342, A CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANAMAG A LIMITED PARTNERSHIP
Assigned to ANAMAG LIMITED PARTNERSHIP, OF reassignment ANAMAG LIMITED PARTNERSHIP, OF ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ATLANTIC RICHFIELD COMPANY
Anticipated expiration legal-status Critical
Assigned to CONGRESS FINANCIAL CORPORATION reassignment CONGRESS FINANCIAL CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANAMAG A LIMITED PARTNERSHIP
Assigned to CHASE COMMERCIAL CORPORATION, A NEW JERSEY CORP. reassignment CHASE COMMERCIAL CORPORATION, A NEW JERSEY CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANAMAG INC., A DE. CORP.
Assigned to CONGRESS FINANCIAL CORPORATION (CENTRAL) AND CONGRESS FINANCIAL CORPORATION reassignment CONGRESS FINANCIAL CORPORATION (CENTRAL) AND CONGRESS FINANCIAL CORPORATION SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ANAMAG INC.
Assigned to ANAMAG, INC., A CORP OF DE. reassignment ANAMAG, INC., A CORP OF DE. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ANAMAG A LIMITED PARTNERSHIP BY: ANAMAG GENERAL, INC., GENERAL PARTNER
Assigned to GLENFED FINANCIAL CORPORATION, 104 CARNEGIE CENTER, PRINCETON, NJ., 08540, A CORP OF CA. reassignment GLENFED FINANCIAL CORPORATION, 104 CARNEGIE CENTER, PRINCETON, NJ., 08540, A CORP OF CA. SECURITY INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MAGNET WIRE COMPANY THE, A CORP OF DE.
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/02Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of inorganic substances
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/90Magnetic feature
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/29Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2913Rod, strand, filament or fiber
    • Y10T428/2933Coated or with bond, impregnation or core
    • Y10T428/294Coated or with bond, impregnation or core including metal or compound thereof [excluding glass, ceramic and asbestos]
    • Y10T428/2958Metal or metal compound in coating

Definitions

  • our invention relates to an improvement in metal coating enamels of the type comprising fusible glass elements where it is intended to pyrolize the organic constituent and fuse the glass to form the final coating.
  • our invention relates to the inclusion in said enamels of manganese and cobalt chelates.
  • magnet wire enamel comprising l-25 parts by weight of fusible powdered glass, 75-90 parts by weight of organic enamel such as terephthalate modified phenyl-methyl-siloxane resin, and 0.53 parts by weight of manganous or cobaltous chelate.
  • Example in an example a magnet wire enamel was formulated as follows:
  • the slurry of the example was applied to a nickelplated copper wire and baked at 250 C. to form a uniform coating.
  • the wire was then wound into a coil and placed in an oven at 500 C. for 15 minutes to burn off the enamel. Thereafter the oven temperature was raised to 650 C. for /2 hour to fuse the insulation. When it was subsequently cooled the coil wire forming the coil was found to be insulated with a uniform coating of fused glass.
  • the drawing shows a section of a coil made to our in vention prior to pyrolizing the enamel.
  • a coil is indicate-d generally by the numeral 10 made up of a plurality of turns of a magnet wire 11.
  • the wire 11 has a copper conductor 12 with an outer plating 13 of nickel to prevent oxidation of the copper at high temperatures of operation.
  • the nickel coating is much exaggerated in the drawing and it will be understood that we do not wish to limit our invention to any particular selection of conductor material.
  • Surrounding the conductor 12 is an organic enamel 14 in which has been suspended and baked prior to the formation of the coil 10 a sufficient percentage of glass particles 16 to completely coat the conductor 12 after the enamel 14 has been pyrolized and the glass has been fused. It is a feature of the enamel 14 that it comprises a small percentage of manganese and cobalt chelate.
  • the electrical system comprising the wire 12 and glasscomprising enamel 14 may be shipped and stored for long periods prior to forming into windings.
  • An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an organic binder supporting said insulation said binder being pyrolized prior to the fusion of said insulation, and a minor amount of metal chelate selected from the class consisting of cobalt and manganese chelates compounded in said binder.
  • An electrical system comprising a conductor, an enamel coating said conductor, fusible glass particles suspended in said enamel, said enamel being pyrolized prior to the fusion of said particles, and a minor amount of metal chelate selected from the class consisting of cobalt and manganese chelates compounded in said binder.
  • An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an enamel binder supporting said insulation said binder being pryolized prior to the fusion of said insulation, and about 0.53% by weight of a cobalt chelate compounded in said binder.
  • An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an enamel binder supporting said insulation said binder being pyrolized prior to the fusion of said insulation and about 0.54% by weight of a manganese chelate compounded in said binder.

Description

1968 H. L.'SAUMS ETAL 3,367,796
PYROLIZABLE ENAMEL COATED WIRE COMPRISING MANGANESE AND COBALT CHELATES Original Filed March 8, 1962 ENAMEL COMPRISING MANGANESE end/or coBALTj CHELATE INVENTORS HARRY L. SAUMS BY WESLEY W. PENDLETON 3,367,795 Patented Feb. 6, 1968 free 3,367,796 PYROLIZABLE ENAMEL COATED WERE COM- PRHSING MANGANESE AND COBALT CHELATES Harry L. Saurns, North Musiregon, and Wesley W. Pendleton, Muskegon, Micln, assignors to Anaconda Wire and Cable Company Original application Mar. 8, 1962, Ser. No. 178,349. Divided and this application July 13, 1966, Ser. No.
6 Claims. (Cl. 117-215) This application is a division of application Ser. No. 178,349, =filed Mar. 8, 1962, now Patent Number 3,294,- 731.
=Our invention relates to an improvement in metal coating enamels of the type comprising fusible glass elements where it is intended to pyrolize the organic constituent and fuse the glass to form the final coating. Particularl our invention relates to the inclusion in said enamels of manganese and cobalt chelates.
In the preparation of electrical windings for very high temperature service it has been disclosed by the present applicants in an application now pending to coat magnet wire with a fusible glass held in place by an organic enamel, to form the coated wire into windings, to burn or pyrolize off the organic constituent and to fuse the glass so that the insulating components of the completed winding are entirely vitreous and free from carbon compounds with the result that the winding can be safely operated at temperatures in excess of 500 C. which would completely destroy conventional windings.
In the course of manufacturing windings of the type described above there is a critical period, during and directly following the pyrolysis of the organic enamel and prior to the complete fusion of the glass where the latter may become separated from the Wire it is intended to cover. This wire is usually a nickel-plated copper wire and in prior art methods there is no adhesion of glass to the nickel surface after the organic binder has been pyrolized.
It is an object of our invention to maintain the integrity of the glass insulation of an electrical winding during and subsequent to the fusion of the glass into a contiguous coating.
We have found that when a small percentage of a cobalt or manganese chelate is added to the enamel composition the glass remains in posit-ion on the wire and we have invented an electrical system comprising a conductor, fusible glass insulation surrounding the conductor, and an organic binder supporting the insulation. Our binder is intended to be pyrolized prior to the fusion of the glass insulation and it comprises a minor amount of cobalt or manganese chelate. Our insulation may comprise glass particles suspended in enamel and the amount of chelate will preferably comprise 0.53% by weight. We prefer to use cobaltous or manganous ethylenediamine tetraacetate.
We have invented a magnet wire enamel comprising l-25 parts by weight of fusible powdered glass, 75-90 parts by weight of organic enamel such as terephthalate modified phenyl-methyl-siloxane resin, and 0.53 parts by weight of manganous or cobaltous chelate.
Example In an example a magnet wire enamel was formulated as follows:
Lbs.
Finely powdered aluminum borosilicate glass 2.8
Cobaltous ethylenediamine tetraacetate 0.14
Manganous ethylenediamine tetraacetate 0.14 Terephthala-te polyester modified phenyl-methylsiloxane (50% solids, in Xylene) 14.0
The slurry of the example was applied to a nickelplated copper wire and baked at 250 C. to form a uniform coating. The wire was then wound into a coil and placed in an oven at 500 C. for 15 minutes to burn off the enamel. Thereafter the oven temperature was raised to 650 C. for /2 hour to fuse the insulation. When it Was subsequently cooled the coil wire forming the coil was found to be insulated with a uniform coating of fused glass.
Features of our invention are shown in the appended drawing.
The drawing shows a section of a coil made to our in vention prior to pyrolizing the enamel.
In the drawing a coil is indicate-d generally by the numeral 10 made up of a plurality of turns of a magnet wire 11. The wire 11 has a copper conductor 12 with an outer plating 13 of nickel to prevent oxidation of the copper at high temperatures of operation. The nickel coating is much exaggerated in the drawing and it will be understood that we do not wish to limit our invention to any particular selection of conductor material. Surrounding the conductor 12 is an organic enamel 14 in which has been suspended and baked prior to the formation of the coil 10 a sufficient percentage of glass particles 16 to completely coat the conductor 12 after the enamel 14 has been pyrolized and the glass has been fused. It is a feature of the enamel 14 that it comprises a small percentage of manganese and cobalt chelate.
The electrical system comprising the wire 12 and glasscomprising enamel 14 may be shipped and stored for long periods prior to forming into windings.
We have invented new and useful articles and compositions for which we desire an award of Letters Patent.
We claim:
1. An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an organic binder supporting said insulation said binder being pyrolized prior to the fusion of said insulation, and a minor amount of metal chelate selected from the class consisting of cobalt and manganese chelates compounded in said binder.
2. An electrical system comprising a conductor, an enamel coating said conductor, fusible glass particles suspended in said enamel, said enamel being pyrolized prior to the fusion of said particles, and a minor amount of metal chelate selected from the class consisting of cobalt and manganese chelates compounded in said binder.
3. An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an enamel binder supporting said insulation said binder being pryolized prior to the fusion of said insulation, and about 0.53% by weight of a cobalt chelate compounded in said binder.
4. The system of claim 3 wherein said chelate in cobaltous ethylenediamine tetraacetate.
5. An electrical system comprising a conductor, fusible glass insulation surrounding said conductor, an enamel binder supporting said insulation said binder being pyrolized prior to the fusion of said insulation and about 0.54% by weight of a manganese chelate compounded in said binder.
6. The system of claim 5 wherein said chelate is manganous ethylenediamine tetraacetate.
References Cited UNITED STATES PATENTS 2,465,296 3/1949 Swiss 260-45.75 X 3,059,046 10/ 1962 Westervelt et al. 117231 3,078,186 2/1196'3 Tierney l17-231 3,089,787 5/1963 Sattler et al. 117-231 3,093,511 6/1963 Weisel et a1. 106-291 3,119,897 1/1964 Coper 174110 WILLIAM L. JARVIS, Primary Examiner.

Claims (1)

1. AN ELECTRICAL SYSTEM COMPRISING A CONDUCTOR, FUSIBLE GLASS INSULATION SURROUNDING SAID CONDUCTOR, AN ORGANIC BINDER SUPPORTING SAID INSULATION SAID BINDER BEING PYROLIZED PRIOR TO THE FUSION OF SAID INSULATION, AND A MINOR AMOUNT OF METAL CHELATE SELECTED FROM THE CLASS CONSISTING OF COBALT AND MANGANESE CHELATES COMPOUNDED IN SAID BINDER.
US618547A 1962-03-08 1966-07-13 Pyrolizable enamel coated wire comprising manganese and cobalt chelates Expired - Lifetime US3367796A (en)

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US178349A US3294731A (en) 1962-03-08 1962-03-08 Pyrolizable enamel from mn and co chelates, glass, and siloxane resin
US618547A US3367796A (en) 1962-03-08 1966-07-13 Pyrolizable enamel coated wire comprising manganese and cobalt chelates

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636242A (en) * 1968-12-09 1972-01-18 Ericsson Telefon Ab L M An electric conductor wire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465296A (en) * 1944-09-20 1949-03-22 Westinghouse Electric Corp Metal chelate stabilized organic silicon compositions and products thereof
US3059046A (en) * 1958-05-16 1962-10-16 Westinghouse Electric Corp Solid inorganic insulation for metallic conductors
US3078186A (en) * 1960-07-26 1963-02-19 Westinghouse Electric Corp Ceramic potting composition and method of encapsulating an electrical article therewith
US3089787A (en) * 1959-12-07 1963-05-14 Westinghouse Electric Corp Electrical insulating coating composition, method, and coated article
US3093511A (en) * 1960-02-17 1963-06-11 Westinghouse Electric Corp Solid inorganic insulation for metallic conductors and electrical members insulated therewith
US3119897A (en) * 1959-06-16 1964-01-28 Daven Company Insulated wire for high temperature use and coils made therefrom

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2465296A (en) * 1944-09-20 1949-03-22 Westinghouse Electric Corp Metal chelate stabilized organic silicon compositions and products thereof
US3059046A (en) * 1958-05-16 1962-10-16 Westinghouse Electric Corp Solid inorganic insulation for metallic conductors
US3119897A (en) * 1959-06-16 1964-01-28 Daven Company Insulated wire for high temperature use and coils made therefrom
US3089787A (en) * 1959-12-07 1963-05-14 Westinghouse Electric Corp Electrical insulating coating composition, method, and coated article
US3093511A (en) * 1960-02-17 1963-06-11 Westinghouse Electric Corp Solid inorganic insulation for metallic conductors and electrical members insulated therewith
US3078186A (en) * 1960-07-26 1963-02-19 Westinghouse Electric Corp Ceramic potting composition and method of encapsulating an electrical article therewith

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3636242A (en) * 1968-12-09 1972-01-18 Ericsson Telefon Ab L M An electric conductor wire

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