GB928352A - New or improved materials and moulded bodies having good insulating properties and high chemical resistance - Google Patents

New or improved materials and moulded bodies having good insulating properties and high chemical resistance

Info

Publication number
GB928352A
GB928352A GB22500/59A GB2250059A GB928352A GB 928352 A GB928352 A GB 928352A GB 22500/59 A GB22500/59 A GB 22500/59A GB 2250059 A GB2250059 A GB 2250059A GB 928352 A GB928352 A GB 928352A
Authority
GB
United Kingdom
Prior art keywords
moulded
graphite
new
chemical resistance
moulded bodies
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
GB22500/59A
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.)
SOUTH AFRICAN COUNCIL SCIENTIF
Original Assignee
SOUTH AFRICAN COUNCIL SCIENTIF
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 SOUTH AFRICAN COUNCIL SCIENTIF filed Critical SOUTH AFRICAN COUNCIL SCIENTIF
Publication of GB928352A publication Critical patent/GB928352A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/02—Elements
    • C08K3/04—Carbon
    • 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
    • H01B1/20—Conductive material dispersed in non-conductive organic material
    • H01B1/24—Conductive material dispersed in non-conductive organic material the conductive material comprising carbon-silicon compounds, carbon or silicon

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Dispersion Chemistry (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A self-supporting heat and pressure-moulded insulating material characterized by a specific resistance of at least 103 ohm. cm., a mechanical strength greater than natural graphite and resistance to attack by acids and alkalis comprises an aggregate, pressure-moulded under conditions preventing or inhibiting lateral spreading of the moulded substance and under substantially solvent-free conditions, and comprising at least 35% by weight of graphite particles predominantly finer than 76 microns and the majority of the individual particles each having a lower overall anisotropy than a single crystal of graphite, and as a binder therefor at least 40% by weight of a chemically resistant, normally solid, thermoplastic resin not having a definite melting point, the anisotropy of the macro-structure of the total compacted aggregate not exceeding the limits corresponding to a preferential crystallographic orientation of the crystallites of not more than 30%, the degree of orientation in the material being defined in terms of the distribution of 002 planes in all possible angular positions. Suitable graphite particles are derived from waste graphite powder of synthetic origin. Resins specified are polymers of halo-hydrocarbons, e.g. polyvinyl chloride, polytrifluoromonochloroethylene and polytetrafluoroethylene. The material may be used in the construction of chemical apparatus or as an electrode holder, e.g. in conjunction with the conducting material of Specification 928,351. Composite moulded bodies comprising an insulating material and a conducting material are described both in Specification 928,351 and the present Specification which disclaims matter claimed in the former. Specification 608,618 also is referred to.
GB22500/59A 1958-07-04 1959-06-30 New or improved materials and moulded bodies having good insulating properties and high chemical resistance Expired GB928352A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA582320 1958-07-04
ZA582321 1958-07-04

Publications (1)

Publication Number Publication Date
GB928352A true GB928352A (en) 1963-06-12

Family

ID=27130871

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22500/59A Expired GB928352A (en) 1958-07-04 1959-06-30 New or improved materials and moulded bodies having good insulating properties and high chemical resistance

Country Status (1)

Country Link
GB (1) GB928352A (en)

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