NO141761C - Fremgangsmaate til fremstilling av formede gjenstander av lignocelluloseholdige materialer - Google Patents

Fremgangsmaate til fremstilling av formede gjenstander av lignocelluloseholdige materialer

Info

Publication number
NO141761C
NO141761C NO741846A NO741846A NO141761C NO 141761 C NO141761 C NO 141761C NO 741846 A NO741846 A NO 741846A NO 741846 A NO741846 A NO 741846A NO 141761 C NO141761 C NO 141761C
Authority
NO
Norway
Prior art keywords
lignocellulous
substances
procedure
preparation
formed articles
Prior art date
Application number
NO741846A
Other languages
English (en)
Other versions
NO141761B (no
NO741846L (no
Inventor
Hans-Joachim Diehr
Hans Immo Sachs
Karl-Josef Kraft
Original Assignee
Bayer Ag
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 Bayer Ag filed Critical Bayer Ag
Publication of NO741846L publication Critical patent/NO741846L/no
Publication of NO141761B publication Critical patent/NO141761B/no
Publication of NO141761C publication Critical patent/NO141761C/no

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L97/00—Compositions of lignin-containing materials
    • C08L97/02—Lignocellulosic material, e.g. wood, straw or bagasse
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
    • B29C33/60—Releasing, lubricating or separating agents
    • 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
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/09—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture
    • C08G18/092—Processes comprising oligomerisation of isocyanates or isothiocyanates involving reaction of a part of the isocyanate or isothiocyanate groups with each other in the reaction mixture oligomerisation to isocyanurate groups
    • 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
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/54—Polycondensates of aldehydes
    • 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
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/64—Macromolecular compounds not provided for by groups C08G18/42 - C08G18/63
    • C08G18/6484—Polysaccharides and derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/17—Amines; Quaternary ammonium compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/16—Nitrogen-containing compounds
    • C08K5/34—Heterocyclic compounds having nitrogen in the ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/26—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds
    • C08L61/28—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with heterocyclic compounds with melamine
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L61/00—Compositions of condensation polymers of aldehydes or ketones; Compositions of derivatives of such polymers
    • C08L61/20—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
    • C08L61/22—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds
    • C08L61/24—Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen of aldehydes with acyclic or carbocyclic compounds with urea or thiourea
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
    • C08L75/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
    • C08L91/06—Waxes
    • C08L91/08—Mineral waxes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
NO741846A 1973-05-22 1974-05-21 Fremgangsmaate til fremstilling av formede gjenstander av lignocelluloseholdige materialer NO141761C (no)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2325926A DE2325926C2 (de) 1973-05-22 1973-05-22 Verfahren zur Herstellung von lignozellulosehaltigen Werkstoffen

Publications (3)

Publication Number Publication Date
NO741846L NO741846L (no) 1974-11-25
NO141761B NO141761B (no) 1980-01-28
NO141761C true NO141761C (no) 1980-05-07

Family

ID=5881736

Family Applications (1)

Application Number Title Priority Date Filing Date
NO741846A NO141761C (no) 1973-05-22 1974-05-21 Fremgangsmaate til fremstilling av formede gjenstander av lignocelluloseholdige materialer

Country Status (16)

Country Link
US (1) US3870665A (no)
AT (1) AT335186B (no)
BE (1) BE815267A (no)
BR (1) BR7404136D0 (no)
CA (1) CA1023525A (no)
CH (1) CH601001A5 (no)
DD (1) DD110801A5 (no)
DE (1) DE2325926C2 (no)
DK (1) DK138396C (no)
ES (1) ES426522A1 (no)
FI (1) FI62326C (no)
FR (1) FR2230494B1 (no)
GB (1) GB1432711A (no)
IT (1) IT1011467B (no)
NO (1) NO141761C (no)
SE (1) SE406735B (no)

Families Citing this family (56)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4046952A (en) * 1973-10-05 1977-09-06 Ellingson Timber Co. Manufacture of overlayed product with phenol-formaldehyde barrier for polyisocyanate binder
US4100328A (en) * 1976-06-04 1978-07-11 Basf Wyandotte Corporation Binder composition and process for preparing pressure molded cellulosic articles
DE2716971C2 (de) * 1977-04-16 1982-06-16 Rütgerswerke AG, 6000 Frankfurt Bindemittel für kochwasser- und witterungsbeständige Platten aus lignozellulosehaltigem Material
US4268565A (en) * 1977-07-28 1981-05-19 Masonite Corporation Post-press molding of man-made boards to produce contoured furniture parts
US4257995A (en) * 1979-05-03 1981-03-24 The Upjohn Company Process for preparing particle board and polyisocyanate-phosphorus compound release agent composition therefor
IN152487B (no) * 1978-09-29 1984-01-28 Upjohn Co
US4292214A (en) * 1979-02-21 1981-09-29 Blount David H Process for the production of polyurethane products
DE2921689A1 (de) * 1979-05-29 1980-12-11 Bayer Ag Selbsttrennende bindemittel auf isocyanatbasis sowie deren verwendung in einem verfahren zur herstellung von formkoerpern
NL7906751A (nl) * 1979-09-11 1981-03-13 Methanol Chemie Nederland Fabricage van spaanplaat.
US4258169A (en) * 1980-03-26 1981-03-24 The Upjohn Company Polyisocyanate compositions containing in-situ formed pyrophosphate mold release agent and process of making
USRE31703E (en) * 1980-03-26 1984-10-09 The Upjohn Company Process of making particle board from pyrophosphate treated polyisocyanates
US4257996A (en) * 1980-04-14 1981-03-24 The Upjohn Company Process for preparing particle board and polyisocyanate-phosphorus compound release agent composition therefor
GB2076414A (en) * 1980-04-30 1981-12-02 Ici Ltd Isocyanate reactions
US4388138A (en) 1980-08-11 1983-06-14 Imperial Chemical Industries Limited Preparing particleboard utilizing a vegetable wax or derivative and polyisocyanate as a release agent on metal press parts
DE3041732A1 (de) * 1980-11-05 1982-06-09 Bayer Ag, 5090 Leverkusen Loesungen von isocyanato-isocyanuraten in weichmachern fuer polyvinylchlorid, ein verfahren zu ihrer herstellung, sowie ihre verwendung als haftverbessernde zusatzmittel in beschichtungsmitteln auf basis von weichgemachtem polyvinylchlorid
US4376088A (en) * 1981-03-18 1983-03-08 The Upjohn Company Process for preparing a particle board using a self-releasing binder comprising a polyisocyanate and a sulfur-containing release agent
US4352696A (en) * 1981-03-30 1982-10-05 The Upjohn Company Process and composition
DE3208963C2 (de) * 1982-03-12 1985-06-27 Deutsche Fibrit Gesellschaft Ebers & Dr. Müller mbH, 4150 Krefeld Trockenverfahren zur Herstellung stark konturierter Vorformlinge aus defibrierten beleimten Holzfasern
US4407771A (en) * 1982-04-26 1983-10-04 The Celotex Corporation Blow line addition of isocyanate binder in fiberboard manufacture
US4528154A (en) * 1983-06-15 1985-07-09 Atlantic Richfield Company Preparation of molded lignocellulosic compositions using an emulsifiable polyisocyanate binder and an emulsifiable carboxy functional siloxane internal release agent
EP0135992A3 (en) * 1983-07-13 1986-05-21 Atlantic Richfield Company Preparation of lignocellulosic composite articles using a functional polysiloxane release agent
DE3522659C1 (de) * 1985-06-25 1987-02-19 Goldschmidt Ag Th Verfahren zur Herstellung von Spanplatten
GB8813396D0 (en) * 1988-06-07 1988-07-13 Earl H A Composite materials
DE3826672A1 (de) * 1988-08-05 1990-02-08 Sandoz Ag Herstellung von bindemittelgebundenen gepressten lignocellulosegebilden
US5002713A (en) * 1989-12-22 1991-03-26 Board Of Control Of Michigan Technological University Method for compression molding articles from lignocellulosic materials
US5128407A (en) * 1991-07-25 1992-07-07 Miles Inc. Urea extended polyisocyanates
DE4400465A1 (de) 1993-07-12 1995-01-19 Bayer Ag Neue Mischungen und ihre Verwendung als Bindemittel zur Herstellung von Verbundmaterialien
DE4327570A1 (de) * 1993-08-17 1995-04-20 Bayer Ag Rieselfähige Preßmassen, Verfahren zu deren Herstellung und ihre Verwendung
US5340852A (en) * 1993-09-09 1994-08-23 Imperial Chemical Industries Plc Polyisocyanate composition
GB9323288D0 (en) * 1993-11-11 1994-01-05 Ici Plc Compatibilising agents
US5587414A (en) * 1993-11-11 1996-12-24 Imperial Chemical Industries Plc Compatibilising agents
US5554438A (en) * 1994-07-22 1996-09-10 Imperial Chemical Industries, Plc Self-release binder system
US6294117B1 (en) 1998-12-17 2001-09-25 Bayer Corporation Mixed PMDI/solid novolac resin binders for the production of wood composite products
US6214265B1 (en) 1998-12-17 2001-04-10 Bayer Corporation Mixed PMDI/resole resin binders for the production of wood composite products
US6224800B1 (en) 1998-12-17 2001-05-01 Bayer Corporation Extended polymethylene poly(phenylisocyanate) resin binders for the production of wood composite products
US6287495B1 (en) 1998-12-23 2001-09-11 Bayer Corporation Thixotropic wood binder compositions
JP3791885B2 (ja) * 1999-09-30 2006-06-28 株式会社サンコーポレーション 建築用パネル
US6416696B1 (en) 1999-12-16 2002-07-09 Bayer Corporation Aqueous mixed pMDI/phenolic resin binders for the production of wood composite products
US6458238B1 (en) 2000-12-29 2002-10-01 Basf Corporation Adhesive binder and synergist composition and process of making lignocellulosic articles
US6451101B1 (en) 2000-12-29 2002-09-17 Basf Corporation Parting agent for an isocyanate wood binder
US6464820B2 (en) 2000-12-29 2002-10-15 Basf Corporation Binder resin and synergist composition including a parting agent and process of making lignocellulosic
AU2004218716B2 (en) * 2001-02-13 2008-04-17 Houston Advanced Research Center Resin-impregnated substrate, method of manufacture and system therefor
US6620459B2 (en) * 2001-02-13 2003-09-16 Houston Advanced Research Center Resin-impregnated substrate, method of manufacture and system therefor
US6562479B1 (en) * 2001-06-25 2003-05-13 Associated Chemists, Inc. Release agent and method for producing same
US6846849B2 (en) 2001-10-24 2005-01-25 Temple-Inland Forest Products Corporation Saccharide-based resin for the preparation of foam
US6822042B2 (en) 2001-10-24 2004-11-23 Temple-Inland Forest Products Corporation Saccharide-based resin for the preparation of composite products
US7439280B2 (en) * 2004-04-06 2008-10-21 Basf Corporation Lignocellulosic composite material and method for preparing the same
EP1796884A4 (en) * 2004-09-22 2013-09-25 Timtek Llc SYSTEMS AND METHODS FOR PRODUCING RECONSOLIDATED PRODUCTS OF LONG-FIBER WOOD PRODUCED IN PRESSURE
US8075735B2 (en) * 2004-09-22 2011-12-13 Timtek, Llc System and method for the separation of bast fibers
WO2007065085A2 (en) * 2005-11-29 2007-06-07 Timtek Australia Pty, Ltd. System and method for the preservative treatment of engineered wood products
US7678309B2 (en) * 2006-11-28 2010-03-16 Timtek, Llc System and method for the preservative treatment of engineered wood products
US9931761B2 (en) 2013-07-25 2018-04-03 Timtek, Llc Steam pressing apparatuses, systems, and methods
WO2018078391A2 (en) * 2016-10-28 2018-05-03 Cambond Limited Bio-composite and bioplastic materials and method
IT201700067961A1 (it) * 2017-06-19 2018-12-19 Pietro Petrillo Materiale composito di natura lignea.
DE102019121476A1 (de) * 2019-08-08 2021-02-11 Siempelkamp Maschinen- Und Anlagenbau Gmbh Werkstoffplatte, Verfahren und Anlage zur Herstellung einer Werkstoffplatte sowie Verwendung einer Werkstoffplatte
CN112959448B (zh) * 2021-02-06 2022-10-28 国际竹藤中心 一种绿色环保的竹材防霉方法

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE452994A (no) * 1941-11-21
DE1131873B (de) * 1956-07-10 1962-06-20 Helmut Loewer Verfahren zum Herstellen von Polyurethan-Schaumstoffkoerpern in mit Trennmitteln versehenen Werkzeugen
DE1092007B (de) * 1959-07-29 1960-11-03 Bayer Ag Verfahren zur Herstellung von ein Carbodiimid-Isocyanat-Addukt enthaltenden Polyisocyanaten
CA794435A (en) * 1965-11-27 1968-09-10 A. Sharp John Particle board prepared with a polyisocyanate-pine resin extract adhesive
AT270189B (de) * 1966-03-17 1969-04-25 Novopan Gmbh Verfahren zur Herstellung von Platten oder Formkörpern durch Verpressen, vorzugsweise Heißpressen einer mit Bindemittel versetzten Masse aus Holzspänen, Holzfasern oder aus verholzten Rohstoffen
DE1653178A1 (de) * 1966-07-16 1970-11-12 Novopan Gmbh Verfahren zur Herstellung von Platten oder Formkoerpern aus mit Bindemittel versetzten Partikeln aus Holz,zellulose- oder lignozellulosehaltigen Materialien od.dgl.
DE1653183A1 (de) * 1967-02-18 1971-11-25 Novopan Gmbh Verfahren zur Erhohung der Widerstandsfaehigkeit von Platten oder Formkoerpern aus mit Bindemittel versetzten Holzspaenen oder lignocellulosehaltigen Rohstoffen
DE1618422A1 (de) * 1967-05-12 1970-10-29 Bayer Ag Verfahren zur Herstellung von Isocyanaten
US3660354A (en) * 1969-08-13 1972-05-02 Gen Tire & Rubber Co Quaternary ammonium and phosphonium thiocyanates and their use as accelerators for epoxy resins
BE757939A (fr) * 1969-10-24 1971-04-01 Bayer Ag Procede de preparation de matieres en mousses
US3666593A (en) * 1969-10-27 1972-05-30 Us Plywood Champ Papers Inc Process for making a polyisocyanate-impregnated,paper-overlaid panel
US3723363A (en) * 1970-09-23 1973-03-27 F Shaw Trimerized crude isocyanate mixtures and polyurethane foams prepared from same
DE2109686C3 (de) * 1971-03-02 1980-09-25 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung oder Veredlung lignozellulosehaltiger Werkstoffe
DE2121670C3 (de) * 1971-05-03 1979-11-15 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von Schaumstoffen
US3736298A (en) * 1971-09-30 1973-05-29 Minnesota Mining & Mfg Polyisocyanurate preparation using double alkoxide catalysts
US3725357A (en) * 1971-12-29 1973-04-03 Gen Tire & Rubber Co Temperature stable flexible isocyanate-terminated polymers and polyisocyanurate polymers therefrom
US3823119A (en) * 1972-06-08 1974-07-09 Marathon Oil Co Polyisocyanate-polyisocyanurate process
DE2534247C2 (de) * 1975-07-31 1987-01-02 Bayer Ag, 5090 Leverkusen Verfahren zur Herstellung von massiven Formteilen

Also Published As

Publication number Publication date
DK138396C (da) 1979-02-05
IT1011467B (it) 1977-01-20
ES426522A1 (es) 1976-07-01
US3870665A (en) 1975-03-11
DE2325926C2 (de) 1990-08-02
DD110801A5 (no) 1975-01-12
FR2230494B1 (no) 1977-10-14
AT335186B (de) 1977-02-25
BE815267A (fr) 1974-11-20
NO141761B (no) 1980-01-28
GB1432711A (en) 1976-04-22
FR2230494A1 (no) 1974-12-20
DE2325926A1 (de) 1974-12-12
ATA417074A (de) 1976-06-15
BR7404136D0 (pt) 1975-09-30
CA1023525A (en) 1978-01-03
SE406735B (sv) 1979-02-26
DK138396B (da) 1978-08-28
FI62326C (fi) 1982-12-10
CH601001A5 (no) 1978-06-30
FI62326B (fi) 1982-08-31
FI154274A (no) 1974-11-23
NO741846L (no) 1974-11-25

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