FR2358271A1 - Stratifies ignifuges pour l'industrie electrique et electronique - Google Patents

Stratifies ignifuges pour l'industrie electrique et electronique

Info

Publication number
FR2358271A1
FR2358271A1 FR7621252A FR7621252A FR2358271A1 FR 2358271 A1 FR2358271 A1 FR 2358271A1 FR 7621252 A FR7621252 A FR 7621252A FR 7621252 A FR7621252 A FR 7621252A FR 2358271 A1 FR2358271 A1 FR 2358271A1
Authority
FR
France
Prior art keywords
fire
electrical
electronic industry
resistant laminates
laminates
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.)
Granted
Application number
FR7621252A
Other languages
English (en)
Other versions
FR2358271B1 (fr
Inventor
Daniel Brulet
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.)
Rhone Poulenc Industries SA
Original Assignee
Rhone Poulenc Industries 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 Rhone Poulenc Industries SA filed Critical Rhone Poulenc Industries SA
Priority to FR7621252A priority Critical patent/FR2358271A1/fr
Priority to NL7707640A priority patent/NL7707640A/xx
Priority to LU77716A priority patent/LU77716A1/xx
Priority to GB29031/77A priority patent/GB1584388A/en
Priority to DK313177A priority patent/DK313177A/da
Priority to BE179257A priority patent/BE856702A/fr
Priority to DE2731251A priority patent/DE2731251B2/de
Priority to US05/814,392 priority patent/US4150188A/en
Priority to JP8261777A priority patent/JPS5327674A/ja
Publication of FR2358271A1 publication Critical patent/FR2358271A1/fr
Application granted granted Critical
Publication of FR2358271B1 publication Critical patent/FR2358271B1/fr
Granted legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B23/00Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
    • B32B23/14Layered products comprising a layer of cellulosic plastic substances, i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose characterised by containing special compounding ingredients
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00Layered products comprising a layer of paper or cardboard
    • B32B29/002Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00Ancillary operations in connection with laminating processes
    • B32B38/08Impregnating
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/185Substances or derivates of cellulose
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/48Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials
    • H01B3/52Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances fibrous materials wood; paper; press board
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00Properties of the layers or laminate
    • B32B2307/30Properties of the layers or laminate having particular thermal properties
    • B32B2307/306Resistant to heat
    • B32B2307/3065Flame resistant or retardant, fire resistant or retardant
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2317/00Animal or vegetable based
    • B32B2317/12Paper, e.g. cardboard
    • B32B2317/125Paper, e.g. cardboard impregnated with thermosetting resin
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00Stock material or miscellaneous articles
    • Y10S428/92Fire or heat protection feature
    • Y10S428/921Fire or flameproofing
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249924Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994Fiber embedded in or on the surface of a polymeric matrix
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249954With chemically effective material or specified gas other than air, N, or carbon dioxide in void-containing component
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/249921Web or sheet containing structurally defined element or component
    • Y10T428/249953Composite having voids in a component [e.g., porous, cellular, etc.]
    • Y10T428/249986Void-containing component contains also a solid fiber or solid particle
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/25Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y10T428/254Polymeric or resinous material
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/26Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31721Of polyimide
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31786Of polyester [e.g., alkyd, etc.]
    • Y10T428/31797Next to addition polymer from unsaturated monomers
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00Stock material or miscellaneous articles
    • Y10T428/31504Composite [nonstructural laminate]
    • Y10T428/31942Of aldehyde or ketone condensation product
    • Y10T428/31949Next to cellulosic
    • Y10T428/31964Paper
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659Including an additional nonwoven fabric
    • Y10T442/673Including particulate material other than fiber
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/699Including particulate material other than strand or fiber material

Abstract

L'invention a pour objet des stratifiés ignifugés constitués par une matière cellulosique imprégnée de résine phénolique. Le procédé de fabrication consiste à incorporer, dans ladite résine phénolique pour imprégnation, du phosphore rouge. Les stratifiés de l'invention sont destinés à l'emploi dans l'industrie électrique et électronique.
FR7621252A 1976-07-12 1976-07-12 Stratifies ignifuges pour l'industrie electrique et electronique Granted FR2358271A1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7621252A FR2358271A1 (fr) 1976-07-12 1976-07-12 Stratifies ignifuges pour l'industrie electrique et electronique
LU77716A LU77716A1 (fr) 1976-07-12 1977-07-08
NL7707640A NL7707640A (nl) 1976-07-12 1977-07-08 Gelaagde materialen, bestaande uit een cellu- losemateriaal, geimpregneerd met een fenolhars.
DK313177A DK313177A (da) 1976-07-12 1977-07-11 Brandhemmende cellulose-phenol-formstoflaminat til brug i den elektriske industri
GB29031/77A GB1584388A (en) 1976-07-12 1977-07-11 Laminates and their production
BE179257A BE856702A (fr) 1976-07-12 1977-07-11 Stratifies ignifuges pour l'industrie electrique et electronique
DE2731251A DE2731251B2 (de) 1976-07-12 1977-07-11 Schichtpreßstoffe für die Elektroindustrie und elektronische Industrie
US05/814,392 US4150188A (en) 1976-07-12 1977-07-11 Fireproof laminations for electric and electronic devices and methods therefor
JP8261777A JPS5327674A (en) 1976-07-12 1977-07-12 Fire proofing laminates for electric and electronic industry

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7621252A FR2358271A1 (fr) 1976-07-12 1976-07-12 Stratifies ignifuges pour l'industrie electrique et electronique

Publications (2)

Publication Number Publication Date
FR2358271A1 true FR2358271A1 (fr) 1978-02-10
FR2358271B1 FR2358271B1 (fr) 1980-03-07

Family

ID=9175587

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7621252A Granted FR2358271A1 (fr) 1976-07-12 1976-07-12 Stratifies ignifuges pour l'industrie electrique et electronique

Country Status (9)

Country Link
US (1) US4150188A (fr)
JP (1) JPS5327674A (fr)
BE (1) BE856702A (fr)
DE (1) DE2731251B2 (fr)
DK (1) DK313177A (fr)
FR (1) FR2358271A1 (fr)
GB (1) GB1584388A (fr)
LU (1) LU77716A1 (fr)
NL (1) NL7707640A (fr)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ZA791450B (en) * 1978-04-07 1980-04-30 Bristol Composite Mat Antistatic fire-retardant structures particularly pipes of reinforced plastics material
US4288491A (en) * 1979-03-13 1981-09-08 Surzhenko Evgeny M Laminated plastic material
DE3022431C2 (de) * 1980-06-14 1984-03-08 Dynamit Nobel Ag, 5210 Troisdorf Verfahren zur Herstellung von Hartpapier
JPS61180981U (fr) * 1985-04-30 1986-11-11
IT1186188B (it) * 1985-11-08 1987-11-18 Pirelli Cavi Spa Nastro composito per l'isolamento di cavi elettrici e cavo elettrico che utilizza tale nastro per il suo isolamento
US5543447A (en) * 1994-09-28 1996-08-06 Southwest Research Institute Stabilization of red amorphous phosphorus by ordered polymeric structures for the manufacture of non-emissive fire retardant plastics
DE10020228A1 (de) 2000-04-25 2001-10-31 Abb Research Ltd Hochspannungsisolationssystem
US20050075021A1 (en) * 2003-10-03 2005-04-07 Lam Robert C. High performance, durable, deposit friction material
US20050074595A1 (en) * 2003-10-03 2005-04-07 Lam Robert C. Friction material containing partially carbonized carbon fibers
US8021744B2 (en) * 2004-06-18 2011-09-20 Borgwarner Inc. Fully fibrous structure friction material
US7429418B2 (en) 2004-07-26 2008-09-30 Borgwarner, Inc. Porous friction material comprising nanoparticles of friction modifying material
US8603614B2 (en) 2004-07-26 2013-12-10 Borgwarner Inc. Porous friction material with nanoparticles of friction modifying material
KR101201958B1 (ko) * 2005-04-26 2012-11-16 보르그워너 인코퍼레이티드 마찰재
EP1943300B1 (fr) * 2005-11-02 2016-07-06 BorgWarner, Inc. Materiaux de friction en carbone
WO2007126970A2 (fr) * 2006-03-29 2007-11-08 Borgwarner Inc. Materiaux de frottement en resines contenant des groupements fonctionnels polaires
EP2028221A1 (fr) * 2007-08-03 2009-02-25 Borgwarner, Inc. Matériau de friction avec du silicone
DE102008013907B4 (de) 2008-03-12 2016-03-10 Borgwarner Inc. Reibschlüssig arbeitende Vorrichtung mit mindestens einer Reiblamelle
DE102009030506A1 (de) * 2008-06-30 2009-12-31 Borgwarner Inc., Auburn Hills Reibungsmaterialien
EP2664602A3 (fr) 2012-05-14 2014-10-01 UPL Limited Phosphore particulaire revêtu, compositions et produits les contenant et procédés de préparation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097175A1 (fr) * 1970-07-03 1972-03-03 Perstorp Ab
DE2200985A1 (de) * 1971-12-29 1973-07-19 Dow Chemical Co Kunststoffmasse zum ummanteln und isolieren von kabeln

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3395105A (en) * 1964-10-06 1968-07-30 Mc Donnell Douglas Corp Epoxy systems containing encapsulated pressure fracturable curing agents
US3422046A (en) * 1966-02-03 1969-01-14 Sherwin Williams Co Coating containing a condensate of a phosphate ether polyol and a melamine,an alkylated amine,and a halogenated hydrocarbon
JPS4983776A (fr) * 1972-12-15 1974-08-12
JPS49115186A (fr) * 1973-03-09 1974-11-02
JPS50128784A (fr) * 1974-03-30 1975-10-11
US3939107A (en) * 1974-09-06 1976-02-17 Monsanto Company Fire-retardant particle board and binder therefor from aminoplast with ammonium polyphosphate-formaldehyde product
US4035315A (en) * 1976-05-03 1977-07-12 Arco Polymers, Inc. Fire-resistant styrene polymer foams

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097175A1 (fr) * 1970-07-03 1972-03-03 Perstorp Ab
DE2200985A1 (de) * 1971-12-29 1973-07-19 Dow Chemical Co Kunststoffmasse zum ummanteln und isolieren von kabeln

Also Published As

Publication number Publication date
NL7707640A (nl) 1978-01-16
DE2731251A1 (de) 1978-01-26
US4150188A (en) 1979-04-17
FR2358271B1 (fr) 1980-03-07
DK313177A (da) 1978-01-13
BE856702A (fr) 1978-01-11
JPS5327674A (en) 1978-03-15
GB1584388A (en) 1981-02-11
LU77716A1 (fr) 1978-02-02
DE2731251B2 (de) 1979-07-05

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