FI68257C - Foerfarande foer framstaellning av r'3sinh-innehaollande silazanpolymerer och av desamma framstaellda keramiska material och produkter - Google Patents
Foerfarande foer framstaellning av r'3sinh-innehaollande silazanpolymerer och av desamma framstaellda keramiska material och produkter Download PDFInfo
- Publication number
- FI68257C FI68257C FI812045A FI812045A FI68257C FI 68257 C FI68257 C FI 68257C FI 812045 A FI812045 A FI 812045A FI 812045 A FI812045 A FI 812045A FI 68257 C FI68257 C FI 68257C
- Authority
- FI
- Finland
- Prior art keywords
- carbon atoms
- alkyl group
- general formula
- silicon carbide
- polymer
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/515—Shaped 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
- C04B35/56—Shaped 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
- C04B35/565—Shaped 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
- C04B35/571—Shaped 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/977—Preparation from organic compounds containing silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/60—Macromolecular 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
- C08G77/62—Nitrogen atoms
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/80—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70
- C01P2002/88—Crystal-structural characteristics defined by measured data other than those specified in group C01P2002/70 by thermal analysis data, e.g. TGA, DTA, DSC
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Manufacturing & Machinery (AREA)
- Inorganic Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Ceramic Products (AREA)
- Silicon Polymers (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US23636681 | 1981-02-20 | ||
US06/236,366 US4312970A (en) | 1981-02-20 | 1981-02-20 | Silazane polymers from {R'3 Si}2 NH and organochlorosilanes |
Publications (3)
Publication Number | Publication Date |
---|---|
FI812045L FI812045L (fi) | 1982-08-21 |
FI68257B FI68257B (fi) | 1985-04-30 |
FI68257C true FI68257C (fi) | 1985-08-12 |
Family
ID=22889189
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI812045A FI68257C (fi) | 1981-02-20 | 1981-06-30 | Foerfarande foer framstaellning av r'3sinh-innehaollande silazanpolymerer och av desamma framstaellda keramiska material och produkter |
Country Status (15)
Country | Link |
---|---|
US (1) | US4312970A (de) |
JP (1) | JPS57139124A (de) |
KR (1) | KR840001711B1 (de) |
AU (1) | AU538466B2 (de) |
BE (1) | BE888787A (de) |
CA (1) | CA1168419A (de) |
DE (1) | DE3128645C2 (de) |
DK (1) | DK286881A (de) |
FI (1) | FI68257C (de) |
FR (1) | FR2500460A1 (de) |
GB (1) | GB2093470B (de) |
IT (1) | IT1136595B (de) |
NL (1) | NL8101940A (de) |
NO (1) | NO158139C (de) |
SE (1) | SE446452B (de) |
Families Citing this family (82)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4612383A (en) * | 1985-04-26 | 1986-09-16 | S R I International | Method of producing polysilazanes |
US4788309A (en) | 1985-04-26 | 1988-11-29 | Sri International | Method of forming compounds having Si-N groups and resulting products |
US4395460A (en) * | 1981-09-21 | 1983-07-26 | Dow Corning Corporation | Preparation of polysilazane polymers and the polymers therefrom |
GB2119777B (en) * | 1982-01-21 | 1985-07-10 | Nippon Carbon Co Ltd | Process for the preparation of sintered bodies |
US4783516A (en) * | 1983-03-31 | 1988-11-08 | Union Carbide Corporation | Polysilane precursors containing olefinic groups for silicon carbide |
US4540803A (en) * | 1983-11-28 | 1985-09-10 | Dow Corning Corporation | Hydrosilazane polymers from [R3 Si]2 NH and HSiCl3 |
US4543344A (en) * | 1983-11-28 | 1985-09-24 | Dow Corning Corporation | Silicon nitride-containing ceramic material prepared by pyrolysis of hydrosilazane polymers from (R3 Si)2 NH and HSiCl3 |
US4535007A (en) * | 1984-07-02 | 1985-08-13 | Dow Corning Corporation | Silicon nitride-containing ceramics |
CA1241972A (en) * | 1984-09-11 | 1988-09-13 | Dow Corning Corporation | Ceramic materials from silazane polymers |
US4668642A (en) * | 1984-09-11 | 1987-05-26 | Dow Corning Corporation | Ceramic materials from silazane polymers |
US4666872A (en) * | 1984-09-21 | 1987-05-19 | Dow Corning Corporation | Ceramic materials from silazane polymers |
US4757035A (en) * | 1984-09-21 | 1988-07-12 | Dow Corning Corporation | Ceramic materials with increased crystallinity from silazane polymers |
FR2577933B1 (fr) * | 1985-02-27 | 1987-02-20 | Rhone Poulenc Rech | Procede de preparation d'organopolysilazanes et d'organopoly(disilyl)silazanes de tenue thermique amelioree et son utilisation notamment comme precurseur de ceramique |
US5008422A (en) * | 1985-04-26 | 1991-04-16 | Sri International | Polysilazanes and related compositions, processes and uses |
EP0206449A3 (de) * | 1985-06-24 | 1987-06-24 | Dow Corning Corporation | Verfahren zur Herstellung von Keramikwerkstoffen |
US4650837A (en) * | 1985-09-30 | 1987-03-17 | Massachusetts Institute Of Technology | Method for converting Si-H containing polycarbosilanes to new and useful preceramic polymers and ceramic materials |
US4645807A (en) * | 1985-07-18 | 1987-02-24 | Massachusetts Institute Of Technology | Method for forming new preceramic polymers for SiC and Si3 N4 /SiC systems |
US4719273A (en) * | 1985-09-04 | 1988-01-12 | Massachusetts Institute Of Technology | Method for forming new preceramic polymers containing silicon |
US4639501A (en) * | 1985-09-04 | 1987-01-27 | Massachusetts Institute Of Technology | Method for forming new preceramic polymers containing silicon |
US4789507A (en) * | 1985-10-28 | 1988-12-06 | Hoechst Celanese Corporation | Production of preceramic and ceramic fibers from friable, thermally sensitive organosilicon preceramic polymers |
FR2590584B1 (fr) * | 1985-11-28 | 1988-03-04 | Rhone Poulenc Spec Chim | Procede de preparation, en deux etapes, de reticulats d'organopolysilazanes de tenue thermique amelioree pouvant servir notamment comme precurseur ceramique |
FR2590580B1 (fr) * | 1985-11-28 | 1988-05-13 | Rhone Poulenc Spec Chim | Procede de traitement catalytique d'un polysilazane comportant en moyenne au moins deux groupes hydrocarbone a insaturation aliphatique par molecule |
US5503817A (en) * | 1986-01-16 | 1996-04-02 | Hoechst Celanese Corp. | Curing of preceramic articles with gaseous hydrogen halide |
US4705837A (en) * | 1986-04-08 | 1987-11-10 | Massachusetts Institute Of Technology | Method for converting Si-H containing polysiloxanes to new and useful preceramic polymers and ceramic materials |
US4863799A (en) * | 1986-05-22 | 1989-09-05 | Hoechst Celanese Corp. | Sheath core spun organosilicon preceramic fibers and processes for production |
JPS62290730A (ja) * | 1986-06-10 | 1987-12-17 | Shin Etsu Chem Co Ltd | 有機シラザン重合体の製造方法 |
JPS636113A (ja) * | 1986-06-23 | 1988-01-12 | Chisso Corp | 無機繊維の製造方法 |
US4746480A (en) * | 1986-08-11 | 1988-05-24 | Hoechst Celanese Corporation | Process for providing a protective oxide coating on ceramic fibers |
US4720532A (en) * | 1986-08-22 | 1988-01-19 | Massachusetts Institute Of Technology | Organopolysilazane precursors to silicon nitride-rich mixed SiC/Si3 N4 |
US4816497A (en) * | 1986-09-08 | 1989-03-28 | The Dow Corning Corporation | Infusible preceramic silazane polymers via ultraviolet irradiation |
US4869854A (en) * | 1986-10-31 | 1989-09-26 | Shin-Etsu Chemical Co., Ltd. | Process for manufacturing organic silazane polymers and ceramics therefrom |
US4742143A (en) * | 1986-11-04 | 1988-05-03 | Dow Corning Corporation | Preceramic polymers derived from cyclic silazanes, and halosilanes and a method for their preparation |
US4822697A (en) * | 1986-12-03 | 1989-04-18 | Dow Corning Corporation | Platinum and rhodium catalysis of low temperature formation multilayer ceramics |
US4826733A (en) * | 1986-12-03 | 1989-05-02 | Dow Corning Corporation | Sin-containing coatings for electronic devices |
US4756977A (en) * | 1986-12-03 | 1988-07-12 | Dow Corning Corporation | Multilayer ceramics from hydrogen silsesquioxane |
US4749631B1 (en) * | 1986-12-04 | 1993-03-23 | Multilayer ceramics from silicate esters | |
US4911992A (en) * | 1986-12-04 | 1990-03-27 | Dow Corning Corporation | Platinum or rhodium catalyzed multilayer ceramic coatings from hydrogen silsesquioxane resin and metal oxides |
US4753855A (en) * | 1986-12-04 | 1988-06-28 | Dow Corning Corporation | Multilayer ceramic coatings from metal oxides for protection of electronic devices |
US4962175A (en) * | 1986-12-22 | 1990-10-09 | Dow Corning Corporation | Alkylpoly (polysilyl) azane preceramic polymers |
US4753856A (en) * | 1987-01-02 | 1988-06-28 | Dow Corning Corporation | Multilayer ceramic coatings from silicate esters and metal oxides |
JPS63210133A (ja) * | 1987-02-25 | 1988-08-31 | Shin Etsu Chem Co Ltd | 有機シラザン重合体の製造方法 |
US4835238A (en) * | 1987-06-08 | 1989-05-30 | Dow Corning Corporation | Polysilacyclobutasilazanes |
US4774312A (en) * | 1987-06-08 | 1988-09-27 | Dow Corning Corporation | Polydisilacyclobutasilazanes |
US4810443A (en) * | 1987-07-02 | 1989-03-07 | Dow Corning Coporation | Method for forming filaments from a resin |
US4847027A (en) * | 1987-07-06 | 1989-07-11 | Dow Corning Corporation | Infusible preceramic polymers via nitric oxide treatment |
US4798701A (en) * | 1987-07-13 | 1989-01-17 | International Business Machines Corporation | Method of synthesizing amorphous group IIIA-group VA compounds |
US4800221A (en) * | 1987-08-25 | 1989-01-24 | Dow Corning Corporation | Silicon carbide preceramic polymers |
US5084423A (en) * | 1987-11-07 | 1992-01-28 | Hoechst Aktiengesellschaft | Polysilazanes, process for the preparation thereof, silicon, nitride-containing ceramic materials which can be prepared therefrom, and the preparation thereof |
US5176941A (en) * | 1987-11-07 | 1993-01-05 | Hoechst Aktiengesellschaft | Process of producing a ceramic/fiber composite using a molten polysilazone |
US4772516A (en) * | 1987-11-09 | 1988-09-20 | Mahone Louis G | Stable methylpolydisilylazane polymers |
JPH01153730A (ja) * | 1987-12-11 | 1989-06-15 | Shin Etsu Chem Co Ltd | 有機シラザン重合体の製造方法 |
US4929742A (en) * | 1988-11-28 | 1990-05-29 | Dow Corning Corporation | Silane modified polysilacyclobutasilazanes |
US5070116A (en) * | 1989-06-02 | 1991-12-03 | Massachusetts Institute Of Technology | Preceramic organosilicon-metal carbonyl polymers |
US5547623A (en) * | 1989-08-21 | 1996-08-20 | Dow Corning Corporation | Method for continuous spinning and pyrolysis of ceramic filaments from a resin |
JPH0662776B2 (ja) * | 1989-08-24 | 1994-08-17 | 信越化学工業株式会社 | ポリチタノカルボシラザン重合体及び該重合体を用いたセラミックスの製造方法 |
FR2652081A1 (fr) * | 1989-09-21 | 1991-03-22 | Rhone Poulenc Chimie | Procede de preparation d'un composite si3n4-sic. |
US5171736A (en) * | 1989-10-16 | 1992-12-15 | Massachusetts Institute Of Technology | Preceramic organosilicon-boron polymers |
JPH03190933A (ja) * | 1989-12-20 | 1991-08-20 | Shin Etsu Chem Co Ltd | 有機シラザン重合体の製造方法及び該重合体を用いたセラミックスの製造方法 |
US5545687A (en) * | 1990-02-21 | 1996-08-13 | Dow Corning Corporation | Preparation of high density boron carbide ceramics with preceramic polymer binders |
US5051215A (en) * | 1990-03-21 | 1991-09-24 | Dow Corning Corporation | Curing preceramic polymers by exposure to nitrogen dioxide |
US5783139A (en) * | 1990-04-18 | 1998-07-21 | Curran; Dennis John Gerard | Ceramic materials |
US5292830A (en) * | 1991-06-20 | 1994-03-08 | Tonen Corporation | Thermosetting copolymers, silicon carbide-based fiber and processes for producing same |
US5204380A (en) * | 1991-08-29 | 1993-04-20 | Massachusetts Institute Of Technology | Preparation of silicon carbide ceramics from the modification of an Si-H containing polysilane |
US6146559A (en) | 1994-07-28 | 2000-11-14 | Dow Corning Corporation | Preparation of high density titanium diboride ceramics with preceramic polymer binders |
US5449646A (en) | 1994-07-29 | 1995-09-12 | Dow Corning Corporation | Preparation of high density zirconium diboride ceramics with preceramic polymer binders |
US5447893A (en) | 1994-08-01 | 1995-09-05 | Dow Corning Corporation | Preparation of high density titanium carbide ceramics with preceramic polymer binders |
CA2154216A1 (en) | 1994-08-01 | 1996-02-02 | Gregg Alan Zank | Preparation of high density zirconium carbide ceramics with preceramic polymer binders |
KR100804873B1 (ko) * | 1999-06-10 | 2008-02-20 | 얼라이드시그날 인코퍼레이티드 | 포토리소그래피용 sog 반사방지 코팅 |
US6368400B1 (en) * | 2000-07-17 | 2002-04-09 | Honeywell International | Absorbing compounds for spin-on-glass anti-reflective coatings for photolithography |
US8053159B2 (en) | 2003-11-18 | 2011-11-08 | Honeywell International Inc. | Antireflective coatings for via fill and photolithography applications and methods of preparation thereof |
US20100163791A1 (en) * | 2006-12-28 | 2010-07-01 | Hiroshi Fukui | Porous Silicon-Containing Carbon-Based Composite Material, Electrode and Battery Formed Therefrom |
US8642246B2 (en) * | 2007-02-26 | 2014-02-04 | Honeywell International Inc. | Compositions, coatings and films for tri-layer patterning applications and methods of preparation thereof |
WO2008123311A1 (ja) * | 2007-03-27 | 2008-10-16 | Tokyo Institute Of Technology | 二次電池用正極材料の製造方法 |
WO2009096501A1 (ja) | 2008-01-30 | 2009-08-06 | Dow Corning Toray Co., Ltd. | 含ケイ素粒子、その製造方法、有機ポリマー組成物、セラミック、およびその製造方法 |
CN102015844B (zh) * | 2008-04-30 | 2013-11-06 | 道康宁东丽株式会社 | 含硅颗粒、其制法、油组合物、陶瓷材料、及其制法 |
US8557877B2 (en) | 2009-06-10 | 2013-10-15 | Honeywell International Inc. | Anti-reflective coatings for optically transparent substrates |
US20120121981A1 (en) | 2009-07-31 | 2012-05-17 | Yukinari Harimoto | Electrode Active Material, Electrode, And Electricity Storage Device |
CN102473907A (zh) | 2009-07-31 | 2012-05-23 | 道康宁东丽株式会社 | 电极活性材料、电极和蓄电装置 |
JP2012178224A (ja) | 2011-01-31 | 2012-09-13 | Dow Corning Toray Co Ltd | 表面炭素被覆ケイ素含有炭素系複合材料の製造方法 |
US8864898B2 (en) | 2011-05-31 | 2014-10-21 | Honeywell International Inc. | Coating formulations for optical elements |
JP2013157221A (ja) | 2012-01-30 | 2013-08-15 | Dow Corning Toray Co Ltd | ケイ素含有炭素系複合材料 |
JP6803842B2 (ja) | 2015-04-13 | 2020-12-23 | ハネウェル・インターナショナル・インコーポレーテッドHoneywell International Inc. | オプトエレクトロニクス用途のためのポリシロキサン製剤及びコーティング |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2564674A (en) * | 1947-08-07 | 1951-08-21 | Nicholas D Cheronis | Preparation of organic silicon compounds |
US3146250A (en) * | 1961-10-11 | 1964-08-25 | Dow Corning | Nitrogen-containing cyclic silanes, their preparation and hydrolysis |
IL22431A (en) * | 1964-11-12 | 1968-11-27 | Fuchs J | Process for the production of disilazanes and the products obtained by this method |
US3553242A (en) * | 1968-04-26 | 1971-01-05 | Monsanto Co | Process for preparing 1,3-disilyl-1,3,2,4-diazadisiletidines |
US3755397A (en) * | 1971-06-01 | 1973-08-28 | Dow Corning | Silylating agent |
DE2218960A1 (de) * | 1972-04-19 | 1973-11-08 | Bayer Ag | Formkoerper aus mogenen mischungen von siliciumcarbid und siliciumnitrid und verfahren zu ihrer erstellung |
DE2243527A1 (de) * | 1972-09-05 | 1974-04-18 | Bayer Ag | Formkoerper aus homogenen mischungen von siliciumcarbid und siliciumnitrid und verfahren zu ihrer herstellung |
US3809713A (en) * | 1973-03-01 | 1974-05-07 | Union Carbide Corp | Process for producing silazane compounds |
JPS52112700A (en) * | 1976-02-28 | 1977-09-21 | Tohoku Daigaku Kinzoku Zairyo | Amorphous organopolysilicone composite for preparing silicone carbide |
-
1981
- 1981-02-20 US US06/236,366 patent/US4312970A/en not_active Expired - Fee Related
- 1981-04-07 GB GB8110908A patent/GB2093470B/en not_active Expired
- 1981-04-07 CA CA000374869A patent/CA1168419A/en not_active Expired
- 1981-04-10 AU AU69401/81A patent/AU538466B2/en not_active Ceased
- 1981-04-21 KR KR1019810001356A patent/KR840001711B1/ko active
- 1981-04-21 NL NL8101940A patent/NL8101940A/nl not_active Application Discontinuation
- 1981-05-04 IT IT21495/81A patent/IT1136595B/it active
- 1981-05-07 JP JP56068859A patent/JPS57139124A/ja active Granted
- 1981-05-13 BE BE0/204772A patent/BE888787A/fr not_active IP Right Cessation
- 1981-05-15 FR FR8109792A patent/FR2500460A1/fr active Granted
- 1981-06-24 SE SE8103955A patent/SE446452B/sv not_active IP Right Cessation
- 1981-06-29 DK DK286881A patent/DK286881A/da not_active Application Discontinuation
- 1981-06-30 FI FI812045A patent/FI68257C/fi not_active IP Right Cessation
- 1981-07-20 DE DE3128645A patent/DE3128645C2/de not_active Expired
-
1982
- 1982-02-19 NO NO820517A patent/NO158139C/no unknown
Also Published As
Publication number | Publication date |
---|---|
NO158139C (no) | 1988-07-20 |
JPS57139124A (en) | 1982-08-27 |
KR840001711B1 (ko) | 1984-10-16 |
AU6940181A (en) | 1982-08-26 |
FI812045L (fi) | 1982-08-21 |
DE3128645C2 (de) | 1987-03-05 |
CA1168419A (en) | 1984-06-05 |
AU538466B2 (en) | 1984-08-16 |
FR2500460B1 (de) | 1984-02-17 |
DE3128645A1 (de) | 1982-09-16 |
FI68257B (fi) | 1985-04-30 |
NO820517L (no) | 1982-08-23 |
IT8121495A0 (it) | 1981-05-04 |
SE446452B (sv) | 1986-09-15 |
GB2093470B (en) | 1984-11-14 |
JPS6133857B2 (de) | 1986-08-05 |
SE8103955L (sv) | 1982-08-21 |
US4312970A (en) | 1982-01-26 |
IT1136595B (it) | 1986-09-03 |
GB2093470A (en) | 1982-09-02 |
DK286881A (da) | 1982-08-21 |
BE888787A (fr) | 1981-11-13 |
KR830005286A (ko) | 1983-08-13 |
FR2500460A1 (fr) | 1982-08-27 |
NO158139B (no) | 1988-04-11 |
NL8101940A (nl) | 1982-09-16 |
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