GB523383A - Improvements in and relating to electrical insulation - Google Patents

Improvements in and relating to electrical insulation

Info

Publication number
GB523383A
GB523383A GB306/39A GB30639A GB523383A GB 523383 A GB523383 A GB 523383A GB 306/39 A GB306/39 A GB 306/39A GB 30639 A GB30639 A GB 30639A GB 523383 A GB523383 A GB 523383A
Authority
GB
United Kingdom
Prior art keywords
parts
rubber
polystyrene
mixed
deproteinized
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
GB306/39A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co Ltd
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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB523383A publication Critical patent/GB523383A/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
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/02—Disposition of insulation

Landscapes

  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

523,383. Rubber compositions. BRITISH THOMSON-HOUSTON CO., Ltd. Jan. 4, 1939, No. 306. Convention date, Jan. 5, 1938. Drawings to Specification. [Class 70] [Also in Group XXXVI] A flexible electrical insulation comprises vulcanized rubber and polystyrene, the latter comprising not more than 40 per cent. by weight of the rubber in the mixture. The rubber, either standard plantation or deproteinized, and polystyrene are mixed at the softening temperature of the latter, and materials such as mercaptobenzothiazole, diortho-tolylguanidine or sulphur may be added to vulcanize the rubber ; fillers such as zinc oxide or clay may also be added. One example comprises, by weight, rubber 75 parts, polystyrene 25 parts, zinc oxide 0.75 parts, zinc laurate 0.75 parts, and tetramethyl-thiuram-disulphide 2.6 parts. For a protective sheath for an X-ray cable, equal weights of deproteinized rubber and polystyrene are mixed at 300‹F. and of this, 50 parts by weight are mixed with deproteinized rubber 50 parts, zinc oxide 0.75 parts, zinc laurate 0.75 parts, stearic acid 0.75 parts, mercaptobenzothiazole 1.25 parts, diorthotolylguanidine 1.25 parts, and sulphur 1.25 parts. Specifications 357,624, 403,502 and 414,527, are referred to.
GB306/39A 1938-01-05 1939-01-04 Improvements in and relating to electrical insulation Expired GB523383A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US523383XA 1938-01-05 1938-01-05

Publications (1)

Publication Number Publication Date
GB523383A true GB523383A (en) 1940-07-12

Family

ID=21976970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB306/39A Expired GB523383A (en) 1938-01-05 1939-01-04 Improvements in and relating to electrical insulation

Country Status (1)

Country Link
GB (1) GB523383A (en)

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Ditmar et al. Overflow during Vulcanization. Its Dependence upon Inactive and Active Fillers, and Errors in Previous Calculations of the Specific Gravity of Vulcanizates Resulting from It