NL301224A - - Google Patents

Info

Publication number
NL301224A
NL301224A NL301224DA NL301224A NL 301224 A NL301224 A NL 301224A NL 301224D A NL301224D A NL 301224DA NL 301224 A NL301224 A NL 301224A
Authority
NL
Netherlands
Application number
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.)
Publication of NL301224A publication Critical patent/NL301224A/xx

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
    • C08G79/00Macromolecular compounds obtained by reactions forming a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon with or without the latter elements in the main chain of the macromolecule
    • C08G79/02Macromolecular compounds obtained by reactions forming a linkage containing atoms other than silicon, sulfur, nitrogen, oxygen, and carbon with or without the latter elements in the main chain of the macromolecule a linkage containing phosphorus
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C323/00Thiols, sulfides, hydropolysulfides or polysulfides substituted by halogen, oxygen or nitrogen atoms, or by sulfur atoms not being part of thio groups
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/10Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step using two or more compounds having active hydrogen in the first polymerisation step
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08Processes
    • C08G18/16Catalysts
    • C08G18/18Catalysts containing secondary or tertiary amines or salts thereof
    • C08G18/1825Catalysts containing secondary or tertiary amines or salts thereof having hydroxy or primary amino groups
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/4009Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/48Polyethers
    • C08G18/4854Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/48Polyethers
    • C08G18/50Polyethers having heteroatoms other than oxygen
    • C08G18/5003Polyethers having heteroatoms other than oxygen having halogens
    • C08G18/5006Polyethers having heteroatoms other than oxygen having halogens having chlorine and/or bromine atoms
    • C08G18/5009Polyethers having heteroatoms other than oxygen having halogens having chlorine and/or bromine atoms having chlorine atoms
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40High-molecular-weight compounds
    • C08G18/52Polythioethers
    • 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
    • C08G18/00Polymeric products of isocyanates or isothiocyanates
    • C08G18/06Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6666Compounds of group C08G18/48 or C08G18/52
    • C08G18/667Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/6681Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38
    • C08G18/6688Compounds of group C08G18/48 or C08G18/52 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/32 or C08G18/3271 and/or polyamines of C08G18/38 with compounds of group C08G18/3271
    • 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
    • C08G65/00Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
    • C08G65/34Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
    • 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
    • C08G2110/00Foam properties
    • C08G2110/0041Foam properties having specified density
    • C08G2110/005< 50kg/m3
    • 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
    • Y10S528/00Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S528/904Isocyanate polymer having stated hydrophilic or hydrophobic property
    • 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
    • Y10S528/00Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S528/905Polymer prepared from isocyanate reactant has adhesive property
    • 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
    • Y10S528/00Synthetic resins or natural rubbers -- part of the class 520 series
    • Y10S528/906Fiber or elastomer prepared from an isocyanate reactant
    • 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
    • Y10T152/00Resilient tires and wheels
    • Y10T152/10Tires, resilient
    • Y10T152/10495Pneumatic tire or inner tube
NL301224D 1954-11-16 NL301224A (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DEF16160A DE1046873B (de) 1954-11-16 1954-11-16 Verfahren zur Herstellung von homogenen Formkoerpern, Schaumkoerpern oder UEberzuegen
DEF16159A DE959948C (de) 1954-11-16 1954-11-16 Verfahren zur Herstellung hydrophober Polyaether mit endstaendigen Hydroxylgruppen
DE355949X 1955-06-11
DEF19370A DE1005275B (de) 1954-11-16 1956-01-26 Verfahren zur Herstellung von hydrophoben Polyaethern aus Glykolen und Thioaetherglykolen
DEF19475A DE1026072B (de) 1954-11-16 1956-02-08 Verfahren zur Herstellung von Schwefel enthaltenden Polykondensationsprodukten
DEF19820A DE1105156B (de) 1954-11-16 1956-03-17 Verfahren zur Herstellung von homogenen Formkoerpern und Schaumkoerpern

Publications (1)

Publication Number Publication Date
NL301224A true NL301224A (de)

Family

ID=27544413

Family Applications (3)

Application Number Title Priority Date Filing Date
NL301225D NL301225A (de) 1954-11-16
NL108528D NL108528C (de) 1954-11-16
NL301224D NL301224A (de) 1954-11-16

Family Applications Before (2)

Application Number Title Priority Date Filing Date
NL301225D NL301225A (de) 1954-11-16
NL108528D NL108528C (de) 1954-11-16

Country Status (7)

Country Link
US (5) US2998413A (de)
BE (1) BE548414A (de)
CH (9) CH391296A (de)
DE (5) DE1046873B (de)
FR (3) FR1139698A (de)
GB (4) GB818359A (de)
NL (3) NL301224A (de)

Families Citing this family (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1068461B (de) * 1957-04-18 1959-11-05
BE574294A (de) * 1957-12-31
GB904188A (en) * 1958-06-13 1962-08-22 Dunlop Rubber Co Flooring compositions
BE584546A (de) * 1958-11-12
NL247110A (de) * 1959-01-08
BE589613A (de) * 1959-04-10
NL258186A (de) * 1959-11-21 1900-01-01
BE602015A (de) * 1960-04-02 1900-01-01
IT649535A (de) * 1960-04-06
US3197440A (en) * 1961-03-23 1965-07-27 Du Pont 1, 4-di(beta-hydroxyethylmercapto)-2, 3, 5, 6 tetrachlorobenzene containing polyether urethanes
US3180854A (en) * 1961-06-14 1965-04-27 Polythane Corp Double diamine modification of urethane prepolymers
US3208500A (en) * 1961-06-23 1965-09-28 Bayer Ag Vehicle tire
DE1156977B (de) * 1962-06-05 1963-11-07 Bayer Ag Verfahren zur Herstellung von elastischen, gegebenenfalls verschaeumten Polyurethanen
US3248429A (en) * 1962-12-03 1966-04-26 Hooker Chemical Corp Phosphorus polymers
US3309427A (en) * 1963-01-15 1967-03-14 Atlas Chemicals Ind Inc Polyhydroxy phosphate esters
US3278123A (en) * 1963-09-23 1966-10-11 Lewis G Anderson Railroad rails
GB1109165A (en) * 1964-07-10 1968-04-10 Dunlop Co Ltd Polyurethanes
US3413265A (en) * 1965-08-31 1968-11-26 Thiokol Chemical Corp Hydrolytic scission of polymers containing gem dithioether linkages
US3298976A (en) * 1966-05-12 1967-01-17 E R Carpenter Company Cellular polyurethane containing barytes and method of making same
US3951898A (en) * 1973-12-18 1976-04-20 Thiokol Corporation Blends of polysulfide polymer latices with urethane prepolymers to produce an improved sealant and caulking composition
US3985708A (en) * 1974-09-18 1976-10-12 American Cyanamid Company Polymeric reaction products of thiodiethanol and diphenols
US4000213A (en) * 1974-12-19 1976-12-28 American Cyanamid Company Use of diepoxides in polythiodiethanol millable gums
US4100328A (en) * 1976-06-04 1978-07-11 Basf Wyandotte Corporation Binder composition and process for preparing pressure molded cellulosic articles
US4430471A (en) 1979-04-06 1984-02-07 American Cyanamid Company Elastomers derived from thiodiethanol having reduced odor
JPH0468330B2 (de) * 1980-12-04 1992-11-02 Prod Res & Chem Corp
US4374970A (en) * 1981-07-07 1983-02-22 E. I. Du Pont De Nemours And Company Sulfur-modified copolyether glycols, a method for preparing them, and polyurethanes prepared therefrom
US4373084A (en) * 1981-07-07 1983-02-08 E. I. Du Pont De Nemours And Company Sulfur-modified polypropylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom
US4371687A (en) * 1981-07-07 1983-02-01 E. I. Du Pont De Nemours And Company Sulfur-modified polytetramethylene ether glycols, a method for preparing them, and polyurethanes prepared therefrom
US4452924A (en) * 1983-05-05 1984-06-05 Mobay Chemical Corporation Flexible polyurethane foams having improved load bearing characteristics
US4609762A (en) * 1984-01-30 1986-09-02 Products Research & Chemical Corp. Thioethers having a high sulfur content and method therefor
US4546122A (en) * 1984-08-06 1985-10-08 Mobay Chemical Corporation Flexible polyurethane foams
US4757119A (en) * 1987-05-04 1988-07-12 Ethyl Corporation Epoxy resin compositions containing poly-(hydrocarbylthio)aromatic diamines
US5357036A (en) * 1990-05-16 1994-10-18 Hitachi Maxell, Ltd. Organic surface-treating agent
EP0674215B1 (de) * 1994-03-11 1999-09-22 Agfa-Gevaert N.V. Photographische Materialien die Polymerverbindungen enthalten
US5700847A (en) * 1995-12-04 1997-12-23 Arco Chemical Technology, L.P. Molded polyurethane foam with enhanced physical properties
US5668191A (en) * 1995-12-21 1997-09-16 Arco Chemical Technology, L.P. One-shot cold molded flexible polyurethane foam from low primary hydroxyl polyols and process for the preparation thereof
CN108623771B (zh) * 2017-03-15 2022-10-25 科思创德国股份有限公司 羟基封端的聚氨酯预聚体及其制备方法
US11732083B2 (en) 2020-11-19 2023-08-22 Covestro Llc Polyisocyanate resins

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR894134A (fr) * 1942-04-23 1944-12-14 Deutsche Hydrierwerke Ag Produits de condensation superpolymères et leur préparation
DE878713C (de) * 1943-02-28 1953-06-05 Phrix Werke Ag Weichmacher fuer Superpolyamide und Verfahren zum Verbessern der mechanischen Eigenschaften von Superpolyamiden
DE901111C (de) * 1944-11-11 1954-01-07 Bobingen Ag Fuer Textil Faser Verfahren zur Herstellung von linearpolymeren Schwefelverbindungen
US2518245A (en) * 1946-08-24 1950-08-08 Shell Dev Process for preparing copolymers from alkylene glycols and di(hydroxyalkyl) sulfides
US2563383A (en) * 1949-01-29 1951-08-07 Shell Dev Terminally unsaturated polythio polyethers
US2726219A (en) * 1951-07-19 1955-12-06 Du Pont Polyalkylene ether glycol-arylene diisocyanate elastomer sponge and process for preparing same
GB731071A (en) * 1951-07-19 1955-06-01 Du Pont Preparation of elastomers from polyalkylene ether glycols and diisocyanates
US2692874A (en) * 1951-07-19 1954-10-26 Du Pont Elastomers from polyalkylene ether glycol reacted with arylene diisocyanate and water
US2692873A (en) * 1951-07-19 1954-10-26 Du Pont Elastomers from polyalkylene ether glycol reacted with arylene diisocyanate and water
US2780350A (en) * 1951-12-11 1957-02-05 Lockheed Aircraft Corp Package with cellular plastic packaging means
US2764565A (en) * 1951-12-24 1956-09-25 Bayer Ag Process and apparatus for the manufacture of polyurethane plastics
US2866762A (en) * 1953-08-19 1958-12-30 Bayer Ag Process for preparing polyurethane foams employing tertiary amine catalysts
US2850464A (en) * 1953-09-22 1958-09-02 Du Pont Manufacture of cellular polyurethane plastics
GB791854A (en) * 1954-04-14 1958-03-12 Du Pont Chemical process and product
US2835654A (en) * 1954-10-11 1958-05-20 Du Pont Process for making elastomers from polymeric bis-chloroformates, phosgene and diamines
DE961573C (de) * 1954-11-16 1957-04-11 Bayer Ag Verfahren zur Herstellung von Schaumstoffen aus hydroxylgruppen- haltigen linearen oder verzweigten Polyaethern oder Polythioaethern und Polyisocyanaten
CH340822A (de) * 1954-12-04 1959-09-15 Bayer Ag Verfahren zur Herstellung geruchloser Polyäther
US2853472A (en) * 1955-02-14 1958-09-23 Du Pont Polyurethane elastomers cured with dhsocyanates
US2888408A (en) * 1955-03-21 1959-05-26 Goodyear Tire & Rubber Treatment of flexible cellular polyurethane material with ammonia
DE1069379B (de) * 1955-03-24 1959-11-19 E. I. du Pont de Nemours and Company, Wilmington, 1DeI. (V. St. A.) Verfahren zur Herstellung homogener Kunststoffe auf Grundlage Urethangrup'pen und gegebenenfalls auch Thioärhergruppen aufweisender Polyglykoläther
US2886555A (en) * 1955-07-26 1959-05-12 Bayer Ag New composition of matter and process for producing same

Also Published As

Publication number Publication date
CH466570A (de) 1968-12-15
US2998413A (en) 1961-08-29
DE1005275B (de) 1957-03-28
GB819384A (en) 1959-09-02
DE1105156B (de) 1961-04-20
US2862972A (en) 1958-12-02
GB843703A (en) 1960-08-10
CH404959A (de) 1965-12-31
FR1153577A (fr) 1958-03-12
FR1139698A (fr) 1957-07-03
DE1046873B (de) 1958-12-18
US3026275A (en) 1962-03-20
BE548414A (de)
CH391296A (de) 1965-04-30
GB818359A (en) 1959-08-12
CH367984A (de) 1963-03-15
CH458738A (de) 1968-06-30
CH355949A (de) 1961-07-31
CH466569A (de) 1968-12-15
NL301225A (de)
CH366672A (de) 1963-01-15
US3016365A (en) 1962-01-09
FR1171552A (fr) 1959-01-28
NL108528C (de)
DE1026072B (de) 1958-03-13
CH398975A (de) 1966-03-15
DE959948C (de) 1957-03-14
GB795276A (en) 1958-05-21
US3005803A (en) 1961-10-24

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