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FR2416794A1 - Matieres denses et flexibles en feuilles composites impregnees d'elastomeres de polyurethane - Google Patents

Matieres denses et flexibles en feuilles composites impregnees d'elastomeres de polyurethane

Info

Publication number
FR2416794A1
FR2416794A1 FR7830659A FR7830659A FR2416794A1 FR 2416794 A1 FR2416794 A1 FR 2416794A1 FR 7830659 A FR7830659 A FR 7830659A FR 7830659 A FR7830659 A FR 7830659A FR 2416794 A1 FR2416794 A1 FR 2416794A1
Authority
FR
France
Prior art keywords
formula
alkyl group
molecular weight
dense
represent hydrogen
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
FR7830659A
Other languages
English (en)
Other versions
FR2416794B1 (fr
Inventor
Minoru Tanaka
Kenkichi Yagi
Shunji Mizuguchi
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.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
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 Toray Industries Inc filed Critical Toray Industries Inc
Publication of FR2416794A1 publication Critical patent/FR2416794A1/fr
Application granted granted Critical
Publication of FR2416794B1 publication Critical patent/FR2416794B1/fr
Granted legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/147—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the isocyanates used
    • D06N3/148—(cyclo)aliphatic polyisocyanates
    • 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
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • 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
    • C08G18/10—Prepolymer processes involving reaction of isocyanates or isothiocyanates with compounds having active hydrogen in a first reaction step
    • C08G18/12—Prepolymer 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
    • 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
    • C08G18/4009—Two or more macromolecular compounds not provided for in one single group of groups C08G18/42 - C08G18/64
    • C08G18/4018—Mixtures of compounds of group C08G18/42 with compounds of group C08G18/48
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/146—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the macromolecular diols used
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
    • D06N3/147—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes characterised by the isocyanates used
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31562—Next to polyamide [nylon, etc.]
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
    • Y10T428/31565—Next to polyester [polyethylene terephthalate, etc.]
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2369—Coating or impregnation improves elasticity, bendability, resiliency, flexibility, or shape retention of the fabric
    • Y10T442/2393—Coating or impregnation provides crease-resistance or wash and wear characteristics
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
    • Y10T442/2861—Coated or impregnated synthetic organic fiber fabric
    • Y10T442/2893—Coated or impregnated polyamide fiber fabric

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Medicinal Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)
  • Laminated Bodies (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

Matières en feuilles composites. Ces matières comprennent une feuille fibreuse imprégnée par un élastomère de polyuréthane, comprenant le produit réactionnel de A (a-1) un mélange de diols polymères contenant un polyétherglycol à poids moléculaire d'environ 800-4.000 et un polyesterglycol à poids moléculaire d'environ 800-4.000, (b-1) un diisocyanate organique de formule I (où R** 1 et R**2 représentent l'hydrogène ou un groupe alkyle) et (c-1) une diamine organique en tant que produit d'extension de chaînes, de formule II (où R**1 et R**2 représentent l'hydrogène ou un groupe alkyle) où B (a-2) un diol polymère à poids moléculaire d'environ 800-4.000, (b-2) un diisocyanate de formule I (où R**1 et R**2 représentent l'hydrogène ou un groupe alkyle à 1-5 atomes de carbone) et (c-2) un mélange de produits d'extension de chaînes comprenant une diamine organique de formule II (où R**1 et R**2 sont l'hydrogène ou un groupe alkyle ayant 1-5 atomes de carbone) et d'un dihydrazide d'acide phtalique de formule III :
FR7830659A 1978-02-13 1978-10-27 Matieres denses et flexibles en feuilles composites impregnees d'elastomeres de polyurethane Granted FR2416794A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP53014047A JPS602429B2 (ja) 1978-02-13 1978-02-13 複合シ−ト状物

Publications (2)

Publication Number Publication Date
FR2416794A1 true FR2416794A1 (fr) 1979-09-07
FR2416794B1 FR2416794B1 (fr) 1981-09-11

Family

ID=11850174

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7830659A Granted FR2416794A1 (fr) 1978-02-13 1978-10-27 Matieres denses et flexibles en feuilles composites impregnees d'elastomeres de polyurethane

Country Status (7)

Country Link
US (1) US4212916A (fr)
JP (1) JPS602429B2 (fr)
CA (1) CA1111726A (fr)
DE (1) DE2905185A1 (fr)
FR (1) FR2416794A1 (fr)
GB (1) GB2014593B (fr)
IT (1) IT1108794B (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412022A (en) * 1981-05-19 1983-10-25 Kuraray Co., Ltd. Polyurethane coating compositions prepared from a polymeric diol, an alicyclic diisocyanate, an alicyclic diamine and either hydrazine or isophthalic acid dihydrazide
US4390679A (en) * 1981-12-17 1983-06-28 Ciba-Geigy Corporation Latent urethane resin systems
GB2141722A (en) * 1983-06-20 1985-01-03 Secretary Industry Brit Urethane composites
US4581433A (en) * 1985-04-29 1986-04-08 Mobay Corporation Elastomer polyurethane-polyurea coatings based on bis(4-isocyanatocyclohexyl)methane
JPH0420363Y2 (fr) * 1986-03-31 1992-05-11
US4975515A (en) * 1987-10-21 1990-12-04 Ethyl Corporation Polyurethanes
JPH021718A (ja) * 1988-02-01 1990-01-08 Asahi Chem Ind Co Ltd ウレタンプレポリマー及びポリウレタン塗料組成物
IT216763Z2 (it) * 1989-07-19 1991-10-03 Alcantara Spa Articolo accoppiato, comprendente uno strato di materiale non tessuto microfibroso, utile nel settore dell'arredamento e del rivestimento.
EP1297045B1 (fr) * 2000-05-29 2006-11-08 Resin Systems Inc. Matrice de resine composite thermodurcissable par voie chimique a deux constituants a utiliser dans des processus de fabrication de composites
CN101545207B (zh) * 2009-04-01 2011-02-16 江南大学 一种纯棉针织物抗起毛起球整理剂及其制备方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1486735A (fr) * 1965-07-14 1967-06-30 Du Pont Polyuréthanes segmentés
GB1247634A (en) * 1969-04-01 1971-09-29 Du Pont Microporous synthetic sheet materials and coating compositions used in the production thereof
JPS4829559A (fr) * 1971-08-16 1973-04-19
JPS4831298A (fr) * 1971-08-27 1973-04-24
FR2183274A1 (fr) * 1972-05-04 1973-12-14 Bayer Ag
FR2183271A1 (fr) * 1972-05-04 1973-12-14 Bayer Ag
FR2204735A1 (fr) * 1972-10-25 1974-05-24 Bayer Ag
US3899292A (en) * 1972-03-23 1975-08-12 Toray Industries Process for crumpling synthetic suede

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3100721A (en) * 1961-02-21 1963-08-13 Du Pont Process for producing microporous films and coatings
DE1123467B (de) 1960-08-12 1962-02-08 Bayer Ag Verfahren zur Herstellung von Urethan- und Semicarbazid-Gruppierungen aufweisenden, aus der Loesung verformbaren, hochelastischen Polymeren
US3379683A (en) * 1963-04-17 1968-04-23 Du Pont Polyurethanes prepared from m-xylylenediamine
GB1110868A (en) 1965-07-14 1968-04-24 Du Pont Elastic segmented polymers
US3531368A (en) 1966-01-07 1970-09-29 Toray Industries Synthetic filaments and the like
GB1241382A (en) * 1968-01-13 1971-08-04 Toray Industries Method for producing composite sheet substance composed of fibres and elastic materials
GB1300268A (en) 1970-06-04 1972-12-20 Toray Industries A pile sheet material and a process of manufacturing the same
US3899623A (en) * 1972-04-10 1975-08-12 Toray Industries Synthetic leather combination of needle-punched fabric and polyetherester polyurethane

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1486735A (fr) * 1965-07-14 1967-06-30 Du Pont Polyuréthanes segmentés
GB1247634A (en) * 1969-04-01 1971-09-29 Du Pont Microporous synthetic sheet materials and coating compositions used in the production thereof
JPS4829559A (fr) * 1971-08-16 1973-04-19
JPS4831298A (fr) * 1971-08-27 1973-04-24
US3899292A (en) * 1972-03-23 1975-08-12 Toray Industries Process for crumpling synthetic suede
FR2183274A1 (fr) * 1972-05-04 1973-12-14 Bayer Ag
FR2183271A1 (fr) * 1972-05-04 1973-12-14 Bayer Ag
FR2204735A1 (fr) * 1972-10-25 1974-05-24 Bayer Ag

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
CA1973 *
CA1974 *
NV1236/72 *

Also Published As

Publication number Publication date
IT7869603A0 (it) 1978-10-15
DE2905185A1 (de) 1979-08-23
FR2416794B1 (fr) 1981-09-11
CA1111726A (fr) 1981-11-03
GB2014593A (en) 1979-08-30
GB2014593B (en) 1982-09-15
DE2905185C2 (fr) 1988-10-13
JPS54107504A (en) 1979-08-23
IT1108794B (it) 1985-12-09
JPS602429B2 (ja) 1985-01-21
US4212916A (en) 1980-07-15

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