GB836398A - Resins for protecting electrical apparatus - Google Patents

Resins for protecting electrical apparatus

Info

Publication number
GB836398A
GB836398A GB1698955A GB1698955A GB836398A GB 836398 A GB836398 A GB 836398A GB 1698955 A GB1698955 A GB 1698955A GB 1698955 A GB1698955 A GB 1698955A GB 836398 A GB836398 A GB 836398A
Authority
GB
United Kingdom
Prior art keywords
parts
castor oil
isocyanate
toluylene
resin obtained
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
GB1698955A
Inventor
John Peter Brennan
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.)
Murphy Radio Ltd
Original Assignee
Murphy Radio 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 Murphy Radio Ltd filed Critical Murphy Radio Ltd
Priority to GB1698955A priority Critical patent/GB836398A/en
Publication of GB836398A publication Critical patent/GB836398A/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
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/302—Polyurethanes or polythiourethanes; Polyurea or polythiourea
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F26/00—Homopolymers and copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a single or double bond to nitrogen or by a heterocyclic ring containing nitrogen
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes

Landscapes

  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Polyurethanes Or Polyureas (AREA)

Abstract

The preparation of resins for potting and impregnating electrical apparatus by copolymerizing a monoethylenically unsaturated compound with a urethane derived from the reaction of castor oil with a di-isocyanate which includes the step of adding 2-4 toluylene di-isocyanate to castor oil in such proportions that substantially only half the isocyanate groups can react. The resins are prepared by warming a mixture of a mono-ethylenically unsaturated compound, e.g. styrene and methyl methacrylate, and a heavy metal accelerator; a resin obtained by adding a small proportion of 2.4 toluylene diisocyanate to an excess of castor oil; and a resin obtained by reacting castor oil with an excess of 2.4 toluylene diisocyanate; and a resin obtained by reacting castor oil with an excess of 2.4-toluylene di-isocyanate to react with one half the isocyanate groups. In an example, 100 parts of stabilized styrene containing cobalt naphthenate and chlorinated diphenyl; a resin obtained by adding 5 parts of 2,4-toluylene diisocyanate to 100 parts of castor oil and an antifoam agent, with a solution of ethyl methyl ketone peroxide in di-methyl phthalate; and a resin obtained by adding 100 parts of castor oil to 60 parts of 2.4 toluylene di-isocyanate at below 60 DEG C. are prepared and allowed to stand. When required as a potting composition 20 parts or up to 40 parts of the first resin, pigmented if desired, are mixed with 100 parts of the second resin which may include a filler, and 150 parts of the third resin added, and after potting the composition is polymerized in stages by heating at for example 25 DEG , 60 DEG and 80 DEG C. An impregnating composition may contain a cumene hydroperoxide catalyst accelerated with cobalt naphthenate, and have a final ratio of 20-40 parts of isocyanate, 5 to 25 parts of styrene and 100 parts of castor oil.
GB1698955A 1955-06-13 1955-06-13 Resins for protecting electrical apparatus Expired GB836398A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1698955A GB836398A (en) 1955-06-13 1955-06-13 Resins for protecting electrical apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1698955A GB836398A (en) 1955-06-13 1955-06-13 Resins for protecting electrical apparatus

Publications (1)

Publication Number Publication Date
GB836398A true GB836398A (en) 1960-06-01

Family

ID=10087221

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1698955A Expired GB836398A (en) 1955-06-13 1955-06-13 Resins for protecting electrical apparatus

Country Status (1)

Country Link
GB (1) GB836398A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023073069A1 (en) 2021-10-27 2023-05-04 Construction Research & Technology Gmbh (meth)acrylate compounds as reactive diluents for polyaddition systems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023073069A1 (en) 2021-10-27 2023-05-04 Construction Research & Technology Gmbh (meth)acrylate compounds as reactive diluents for polyaddition systems

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