GB575029A - Improvements in or relating to semiconducting compositions - Google Patents

Improvements in or relating to semiconducting compositions

Info

Publication number
GB575029A
GB575029A GB20210/43A GB2021043A GB575029A GB 575029 A GB575029 A GB 575029A GB 20210/43 A GB20210/43 A GB 20210/43A GB 2021043 A GB2021043 A GB 2021043A GB 575029 A GB575029 A GB 575029A
Authority
GB
United Kingdom
Prior art keywords
film
gum
coating
forming agent
coal
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
GB20210/43A
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.)
Westinghouse Electric International Co
Original Assignee
Westinghouse Electric International Co
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 Westinghouse Electric International Co filed Critical Westinghouse Electric International Co
Publication of GB575029A publication Critical patent/GB575029A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00—Power cables
    • H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • H01B9/027—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients composed of semi-conducting layers

Landscapes

  • Paints Or Removers (AREA)

Abstract

A composition comprising an aqueous colloidal suspension of anthracite coal having less than ten per cent by weight of volatile matter and a relatively non-reactive water-soluble organic film-forming agent. Film forming agents specified are gum arabic, gum tragacanth, gum gatti, polyvinyl alcohol, methyl cellulose and casein glue. The coal is subjected to milling in water until it has been reduced to a substantially colloidal condition and the film-forming agent then added. Stabilisers such as ammonia may also be present. The coating may be applied either as a paint to insulated conductors or as a semi-conducting tape comprising a fabric material such as glass, cotton or asbestos fibres impregnated with the coating. An overcoating of weather-resistant paint or enamel, and an undercoating comprising a solution of polyisobutylene or high grade asphalt may be applied with the fibrous tape.
GB20210/43A 1942-12-03 1943-12-03 Improvements in or relating to semiconducting compositions Expired GB575029A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US575029XA 1942-12-03 1942-12-03

Publications (1)

Publication Number Publication Date
GB575029A true GB575029A (en) 1946-01-31

Family

ID=22010962

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20210/43A Expired GB575029A (en) 1942-12-03 1943-12-03 Improvements in or relating to semiconducting compositions

Country Status (1)

Country Link
GB (1) GB575029A (en)

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