GB1442858A - Electrical apparatus comprising closed-cell rigid polymeric foam parts - Google Patents

Electrical apparatus comprising closed-cell rigid polymeric foam parts

Info

Publication number
GB1442858A
GB1442858A GB3429773A GB3429773A GB1442858A GB 1442858 A GB1442858 A GB 1442858A GB 3429773 A GB3429773 A GB 3429773A GB 3429773 A GB3429773 A GB 3429773A GB 1442858 A GB1442858 A GB 1442858A
Authority
GB
United Kingdom
Prior art keywords
electrical apparatus
closed
polymeric foam
rigid polymeric
cell rigid
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
GB3429773A
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.)
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
Original Assignee
BBC Brown Boveri AG Switzerland
BBC Brown Boveri France SA
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 BBC Brown Boveri AG Switzerland, BBC Brown Boveri France SA filed Critical BBC Brown Boveri AG Switzerland
Publication of GB1442858A publication Critical patent/GB1442858A/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
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/14—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent organic
    • C08J9/143—Halogen containing compounds

Abstract

1442858 Closed-cell; insulating; polymer foams BBC BROWN BOVERI & CO Ltd 18 July 1973 [20 July 1972] 34297/73 Heading C3C [Also in Division H1] An electrical apparatus comprises one or more parts formed of a closed cell rigid polymeric foam which has cells which contain at least one expanding agent, other than nitrogen, which is also a dielectric, which has a b.p. of not more than - 20‹ C. at a pressure of 1 atm. and which has a dielectric strength (as defined) greater than that of air. The foamed polymer may be a polyurethane and the expanding agent may be sulphur hexafluoride or a halocarbon, e.g. CF 4 , CHF 3 , CF 3 Cl, CF 3 Br, CHClF 2 , CCl 2 F 2 , hexafluoroethane, pentafluorochloroethane or perfluoropropane. The foam is used as mechanical load-bearing high voltage insulation in the electrical apparatus, e.g. switchgear installation or a transformer.
GB3429773A 1972-07-20 1973-07-18 Electrical apparatus comprising closed-cell rigid polymeric foam parts Expired GB1442858A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1083572A CH572269A5 (en) 1972-07-20 1972-07-20

Publications (1)

Publication Number Publication Date
GB1442858A true GB1442858A (en) 1976-07-14

Family

ID=4367334

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3429773A Expired GB1442858A (en) 1972-07-20 1973-07-18 Electrical apparatus comprising closed-cell rigid polymeric foam parts

Country Status (9)

Country Link
JP (1) JPS4945167A (en)
AT (1) AT322863B (en)
CA (1) CA1045805A (en)
CH (1) CH572269A5 (en)
DE (1) DE2241036A1 (en)
FR (1) FR2194022B1 (en)
GB (1) GB1442858A (en)
IT (1) IT998246B (en)
NL (1) NL7309974A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5439947A (en) * 1990-03-23 1995-08-08 E. I. Du Pont De Nemours And Company Polymer foams containing blocking agents
US5489619A (en) * 1991-08-27 1996-02-06 Bp Chemicals Limited Process for producing improved phenolic foams from phenolic resole resins
US5496866A (en) * 1989-02-04 1996-03-05 Bayer Aktiengesellschaft C3 to C5 polyfluoroalkanes propellants
EP0934971A2 (en) * 1998-02-07 1999-08-11 Basf Aktiengesellschaft Process for preparing rigid PU foams with small cell diameter, and their use

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH579606A5 (en) * 1973-06-18 1976-09-15 Bbc Brown Boveri & Cie
CH618041A5 (en) * 1975-06-02 1980-06-30 Bbc Brown Boveri & Cie Mechanically load-bearing, low-temperature withstanding rigid-foam insulating parts of electrical equipment
JPS5232097A (en) * 1975-09-06 1977-03-10 Daikin Ind Ltd Process for preparing thermal insulating materials of polyurethane foa m for low-emperature uses
CA1086450A (en) * 1976-02-03 1980-09-23 Kyung W. Suh Styrene polymer foam and preparation thereof
NO149664C (en) 1977-03-30 1984-05-30 Dow Chemical Co ALKENYL AROMATIC, THERMOPLASTIC POLYMER FOAM FOR INSULATION FORM, AND PROCEDURES FOR PREPARING THEREOF
JPS5482977U (en) * 1977-11-25 1979-06-12
DE3824354A1 (en) * 1988-07-19 1990-01-25 Basf Ag METHOD FOR THE PRODUCTION OF CELL-CONTAINING PLASTICS BY THE POLYISOCYANATE-POLYADDITION PROCESS BY MEANS OF STORAGE-STABLE, FUEL-CONTAINING EMULSIONS AND THESE EMULSIONS
GB9001368D0 (en) * 1990-01-20 1990-03-21 Bp Chem Int Ltd Blowing agents
US4997706A (en) * 1990-02-09 1991-03-05 The Dow Chemical Company Foaming system for closed-cell rigid polymer foam
DE102004008751B4 (en) * 2004-02-23 2008-04-24 Siemens Ag Means for electrical insulation of medium and high voltage components

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5496866A (en) * 1989-02-04 1996-03-05 Bayer Aktiengesellschaft C3 to C5 polyfluoroalkanes propellants
US5439947A (en) * 1990-03-23 1995-08-08 E. I. Du Pont De Nemours And Company Polymer foams containing blocking agents
US5489619A (en) * 1991-08-27 1996-02-06 Bp Chemicals Limited Process for producing improved phenolic foams from phenolic resole resins
EP0934971A2 (en) * 1998-02-07 1999-08-11 Basf Aktiengesellschaft Process for preparing rigid PU foams with small cell diameter, and their use
EP0934971A3 (en) * 1998-02-07 2001-01-17 Basf Aktiengesellschaft Process for preparing rigid PU foams with small cell diameter, and their use

Also Published As

Publication number Publication date
FR2194022B1 (en) 1980-08-08
DE2241036A1 (en) 1974-02-07
IT998246B (en) 1976-01-20
JPS4945167A (en) 1974-04-30
AT322863B (en) 1975-06-10
NL7309974A (en) 1974-01-22
CH572269A5 (en) 1976-01-30
CA1045805A (en) 1979-01-09
FR2194022A1 (en) 1974-02-22

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee