JPS52112700A - Amorphous organopolysilicone composite for preparing silicone carbide - Google Patents

Amorphous organopolysilicone composite for preparing silicone carbide

Info

Publication number
JPS52112700A
JPS52112700A JP2136576A JP2136576A JPS52112700A JP S52112700 A JPS52112700 A JP S52112700A JP 2136576 A JP2136576 A JP 2136576A JP 2136576 A JP2136576 A JP 2136576A JP S52112700 A JPS52112700 A JP S52112700A
Authority
JP
Japan
Prior art keywords
organopolysilicone
amorphous
composite
silicone carbide
preparing silicone
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
JP2136576A
Other languages
English (en)
Other versions
JPS616088B2 (ja
Inventor
Seishi Yajima
Jiyouzaburou Hayashi
Mamoru Oomori
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.)
TOHOKU DAIGAKU KINZOKU ZAIRYO
Original Assignee
TOHOKU DAIGAKU KINZOKU ZAIRYO
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 TOHOKU DAIGAKU KINZOKU ZAIRYO filed Critical TOHOKU DAIGAKU KINZOKU ZAIRYO
Priority to JP2136576A priority Critical patent/JPS52112700A/ja
Priority to US05/770,138 priority patent/US4159259A/en
Priority to GB7600/77A priority patent/GB1579982A/en
Priority to CA272,446A priority patent/CA1102483A/en
Priority to IT48214/77A priority patent/IT1079485B/it
Priority to SE7702090A priority patent/SE432260B/xx
Priority to FR7705651A priority patent/FR2345477A1/fr
Priority to SU772456703A priority patent/SU776565A3/ru
Priority to DE2760031A priority patent/DE2760031C2/de
Priority to DE19772708635 priority patent/DE2708635A1/de
Publication of JPS52112700A publication Critical patent/JPS52112700A/ja
Priority to SE8201643A priority patent/SE457263B/sv
Publication of JPS616088B2 publication Critical patent/JPS616088B2/ja
Granted legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/48Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which at least two but not all the silicon atoms are connected by linkages other than oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/90Carbides
    • C01B32/914Carbides of single elements
    • C01B32/956Silicon carbide
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B32/00Carbon; Compounds thereof
    • C01B32/90Carbides
    • C01B32/914Carbides of single elements
    • C01B32/956Silicon carbide
    • C01B32/963Preparation from compounds containing silicon
    • C01B32/977Preparation from organic compounds containing silicon
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/56Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides
    • C04B35/565Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide
    • C04B35/571Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbides or oxycarbides based on silicon carbide obtained from Si-containing polymer precursors or organosilicon monomers
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/6303Inorganic additives
    • C04B35/6316Binders based on silicon compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08GMACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/60Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule in which all the silicon atoms are connected by linkages other than oxygen atoms
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/70Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data
    • C01P2002/72Crystal-structural characteristics defined by measured X-ray, neutron or electron diffraction data by d-values or two theta-values, e.g. as X-ray diagram
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/80Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/82Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by IR- or Raman-data
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2002/00Crystal-structural characteristics
    • C01P2002/80Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
    • C01P2002/85Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by XPS, EDX or EDAX data
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00Particle morphology
    • C01P2004/60Particles characterised by their size
    • C01P2004/61Micrometer sized, i.e. from 1-100 micrometer
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/10Solid density
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/22Rheological behaviour as dispersion, e.g. viscosity, sedimentation stability
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/32Thermal properties
    • C01P2006/33Phase transition temperatures
    • C01P2006/34Melting temperatures
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/80Compositional purity
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01PINDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00Physical properties of inorganic compounds
    • C01P2006/90Other properties not specified above

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • General Health & Medical Sciences (AREA)
  • Ceramic Products (AREA)
  • Carbon And Carbon Compounds (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Silicon Polymers (AREA)
JP2136576A 1976-02-28 1976-02-28 Amorphous organopolysilicone composite for preparing silicone carbide Granted JPS52112700A (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
JP2136576A JPS52112700A (en) 1976-02-28 1976-02-28 Amorphous organopolysilicone composite for preparing silicone carbide
US05/770,138 US4159259A (en) 1976-02-28 1977-02-18 Organosilicon high molecular weight compounds
GB7600/77A GB1579982A (en) 1976-02-28 1977-02-23 Organosilicon high molecular weight compounds
CA272,446A CA1102483A (en) 1976-02-28 1977-02-23 Organosilicon high molecular weight compounds
SE7702090A SE432260B (sv) 1976-02-28 1977-02-25 Sett att framstella organiska kiselforeningar med hog molekylvikt, vilka er anvendbara for framstellning av kiselkarbidformstycken
IT48214/77A IT1079485B (it) 1976-02-28 1977-02-25 Composti silicoorganici di elevato peso molecolare e procedimento per produrli
FR7705651A FR2345477A1 (fr) 1976-02-28 1977-02-25 Composes d'organosilicium a haut poids moleculaire utilisables dans la preparation de produits moules en carbure de silicium
SU772456703A SU776565A3 (ru) 1976-02-28 1977-02-25 Способ получени кремнийорганического полимера
DE2760031A DE2760031C2 (ja) 1976-02-28 1977-02-28
DE19772708635 DE2708635A1 (de) 1976-02-28 1977-02-28 Organosiliciumverbindungen mit hohem molekulargewicht, verfahren zur herstellung derselben und daraus gebildete siliciumcarbidformkoerper
SE8201643A SE457263B (sv) 1976-02-28 1982-03-16 Saett att framstaella organiska kiselfoereningar med hoeg molekylvikt foer framstaellning av kiselkarbidformstycken

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2136576A JPS52112700A (en) 1976-02-28 1976-02-28 Amorphous organopolysilicone composite for preparing silicone carbide

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP56074721A Division JPS57131252A (en) 1981-05-18 1981-05-18 Amorphous organosilicon high-molecular compound composition for use in production of silicon carbide

Publications (2)

Publication Number Publication Date
JPS52112700A true JPS52112700A (en) 1977-09-21
JPS616088B2 JPS616088B2 (ja) 1986-02-24

Family

ID=12053057

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2136576A Granted JPS52112700A (en) 1976-02-28 1976-02-28 Amorphous organopolysilicone composite for preparing silicone carbide

Country Status (9)

Country Link
US (1) US4159259A (ja)
JP (1) JPS52112700A (ja)
CA (1) CA1102483A (ja)
DE (2) DE2760031C2 (ja)
FR (1) FR2345477A1 (ja)
GB (1) GB1579982A (ja)
IT (1) IT1079485B (ja)
SE (2) SE432260B (ja)
SU (1) SU776565A3 (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54156000A (en) * 1978-05-30 1979-12-08 Dow Corning Manufacture of silicon carbide
JPS55158117A (en) * 1979-05-29 1980-12-09 Dow Corning Method of making silicon carbide
US4560526A (en) * 1983-03-18 1985-12-24 Shin Nisso Kako Co., Ltd. Process for preparing molded silicon carbide product
DE3790151C2 (ja) * 1986-03-11 1991-04-04 The Research Institute For Special Inorganic Materials, Asahi, Ibaraki, Jp
US5292830A (en) * 1991-06-20 1994-03-08 Tonen Corporation Thermosetting copolymers, silicon carbide-based fiber and processes for producing same
US8431189B2 (en) 2009-12-22 2013-04-30 Korea University Research And Business Foundation Carbon nanotube-nanofiber composite structure

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Publication number Priority date Publication date Assignee Title
GB2009196B (en) * 1977-10-26 1982-04-15 Res Inst For Special Inorganic Polycarbosilane process for its prudiction and its use as material for producing silicon carbide
JPS6016385B2 (ja) * 1977-12-28 1985-04-25 日本カ−ボン株式会社 可撓性黒鉛製品の製造法
US4347347A (en) * 1979-06-28 1982-08-31 Ube Industries, Ltd. Crosslinked organometallic block copolymers and process for production thereof
US4342712A (en) * 1979-06-28 1982-08-03 Ube Industries, Ltd. Process for producing continuous inorganic fibers
EP0030105B1 (en) * 1979-11-21 1985-04-10 Ube Industries Limited Polymetallocarbosilane, process for its production and shaped articles of inorganic carbide derived therefrom
US4336215A (en) * 1979-11-30 1982-06-22 Ube Industries, Ltd. Sintered ceramic body and process for production thereof
JPS56109810A (en) * 1980-01-31 1981-08-31 Kurosaki Refract Co Ltd Novel ceramic and its manufacture
US4556526A (en) * 1980-03-25 1985-12-03 Ube Industries, Ltd. Process for production of sintered ceramic body
JPS56147827A (en) * 1980-04-17 1981-11-17 Seishi Yajima Organometallic polymer and its preparation
JPS5756522A (en) * 1980-09-24 1982-04-05 Seishi Yajima Novel continuous inorganic fiber and its preparation
US4340619A (en) * 1981-01-15 1982-07-20 Dow Corning Corporation Process for the preparation of poly(disilyl)silazane polymers and the polymers therefrom
US4312970A (en) * 1981-02-20 1982-01-26 Dow Corning Corporation Silazane polymers from {R'3 Si}2 NH and organochlorosilanes
US4590253A (en) * 1981-08-26 1986-05-20 Kurosaki Refractoris Co., Ltd. Organosilicon polymer and process for production thereof
DE3203659A1 (de) * 1982-02-03 1983-08-11 Nippon Carbon Co., Ltd., Tokyo Verfahren zum herstellen eines sinterkoerpers
US4548690A (en) * 1984-02-28 1985-10-22 Minnesota Mining And Manufacturing Company Photoactivated polymerization of vinyl monomers in the presence of polysilanes and amines
US4482689A (en) * 1984-03-12 1984-11-13 Dow Corning Corporation Process for the preparation of polymetallo(disily)silazane polymers and the polymers therefrom
FR2581391B1 (fr) * 1985-05-06 1987-06-05 Rhone Poulenc Rech Composition organo-polysilazane comportant des generateurs de radicaux libres et reticulable par apport d'energie
US4631179A (en) * 1985-05-28 1986-12-23 Ethyl Corporation Process for the production of silicon carbide by the pyrolysis of a polycarbosilane polymer
DE3707224A1 (de) * 1987-03-06 1988-09-15 Wacker Chemie Gmbh Verfahren zur herstellung eines schutzueberzuges auf basis von siliciumcarbid
US4835238A (en) * 1987-06-08 1989-05-30 Dow Corning Corporation Polysilacyclobutasilazanes
US4774312A (en) * 1987-06-08 1988-09-27 Dow Corning Corporation Polydisilacyclobutasilazanes
US4906710A (en) * 1988-10-31 1990-03-06 Dow Corning Corporation Preceramic metallopolysilanes
US5006584A (en) * 1988-11-23 1991-04-09 Chevron Research And Technology Company Polydialkylsilalkylene polymer useful in enhanced oil recovery using carbon dioxide flooding
US5229481A (en) * 1991-03-28 1993-07-20 The Regents Of The University Of California High-molecular weight, silicon-containing polymers and methods for the preparation and use thereof
US5700400A (en) * 1993-06-15 1997-12-23 Nippon Oil Co., Ltd. Method for producing a semiconducting material
DE4426978A1 (de) * 1994-07-29 1996-02-08 Johann Wilhelm Mueller Pflastersteine und Palisaden mit Holzstruktur
US5668188A (en) * 1996-01-16 1997-09-16 Sandia Corporation Process for preparing silicon carbide foam
DE60018589T2 (de) * 1999-09-13 2006-04-06 Japan Science And Technology Agency, Kawaguchi Organometallisch verbrückte polymere zur verwendung bei der herstellung von keramischen kompositmaterialien und verfahren zur herstellung derselben
US6761975B1 (en) * 1999-12-23 2004-07-13 Honeywell International Inc. Polycarbosilane adhesion promoters for low dielectric constant polymeric materials
US6660230B2 (en) * 2000-06-30 2003-12-09 The United States Of America As Represented By The Secretary Of The Navy Linear chemoselective carbosilane polymers and methods for use in analytical and purification applications
US6627126B2 (en) * 2001-07-16 2003-09-30 United Technologies Corporation Method for preparing refractory carbides
JP2006152063A (ja) * 2004-11-26 2006-06-15 Jsr Corp 新規ポリカルボシランおよびその製造方法、膜形成用組成物、ならびに膜およびその形成方法
WO2011031184A1 (ru) * 2009-09-10 2011-03-17 Stepanov Nikolay Victorovich Способ получения композиционного материала
DE102010037278A1 (de) 2010-09-02 2012-03-08 Hans Freitag Verfahren zum Herstellen von Silizium-basierenden Schichten oder Silizium-basierenden Strukturen unter Verwendung von Silizium-enthaltenden Tinten
RU2453550C1 (ru) * 2011-03-09 2012-06-20 Федеральное государственное унитарное предприятие "Государственный ордена Трудового Красного Знамени научно-исследовательский институт химии и технологии элементоорганических соединений" (ФГУП ГНИИХТЭОС) Способ получения иттрийсодержащих органоалюмоксансилоксанов, связующие и пропиточные композиции на их основе
DE102012221669A1 (de) * 2012-11-27 2014-05-28 Evonik Industries Ag Verfahren zum Herstellen kohlenstoffhaltiger Hydridosilane
US10167366B2 (en) * 2013-03-15 2019-01-01 Melior Innovations, Inc. Polysilocarb materials, methods and uses
CN108623812A (zh) * 2017-03-23 2018-10-09 中国科学院上海应用物理研究所 含异质元素的聚碳硅烷及其制备方法
US20200308064A1 (en) * 2019-04-01 2020-10-01 BWXT Advanced Technologies LLC Modified polymer derived ceramics for additive manufacturing, additive manufacturing using same, and ceramic bodies manufactured thereby

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DE1226310B (de) * 1965-04-06 1966-10-06 Inst Neftechimicheskogo Sintez Verfahren zur Herstellung von elastomeren Silylmethylenpolymeren
US3422039A (en) * 1965-06-16 1969-01-14 Inst Neftechimicheskogo Sintez Method for producing silylmethylene polymer(elastomer)
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GB1278355A (en) * 1968-12-23 1972-06-21 Ventron Corp Reaction products of certain metal/borate ester complexes and chlorosilanes
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CHEMISTRY LETTERS#N9=1975 *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54156000A (en) * 1978-05-30 1979-12-08 Dow Corning Manufacture of silicon carbide
JPS6232127B2 (ja) * 1978-05-30 1987-07-13 Dow Corning
JPS55158117A (en) * 1979-05-29 1980-12-09 Dow Corning Method of making silicon carbide
US4560526A (en) * 1983-03-18 1985-12-24 Shin Nisso Kako Co., Ltd. Process for preparing molded silicon carbide product
DE3790151C2 (ja) * 1986-03-11 1991-04-04 The Research Institute For Special Inorganic Materials, Asahi, Ibaraki, Jp
US5292830A (en) * 1991-06-20 1994-03-08 Tonen Corporation Thermosetting copolymers, silicon carbide-based fiber and processes for producing same
US8431189B2 (en) 2009-12-22 2013-04-30 Korea University Research And Business Foundation Carbon nanotube-nanofiber composite structure

Also Published As

Publication number Publication date
FR2345477B1 (ja) 1982-04-02
SE8201643L (sv) 1982-03-16
SE432260B (sv) 1984-03-26
CA1102483A (en) 1981-06-02
US4159259A (en) 1979-06-26
SE7702090L (sv) 1977-08-29
GB1579982A (en) 1980-11-26
SU776565A3 (ru) 1980-10-30
DE2760031C2 (ja) 1990-05-17
FR2345477A1 (fr) 1977-10-21
DE2708635C2 (ja) 1989-03-02
JPS616088B2 (ja) 1986-02-24
IT1079485B (it) 1985-05-13
DE2708635A1 (de) 1977-09-01
SE457263B (sv) 1988-12-12

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