ES432480A1 - Un metodo de fabricar material en hoja autoportantes. - Google Patents

Un metodo de fabricar material en hoja autoportantes.

Info

Publication number
ES432480A1
ES432480A1 ES432480A ES432480A ES432480A1 ES 432480 A1 ES432480 A1 ES 432480A1 ES 432480 A ES432480 A ES 432480A ES 432480 A ES432480 A ES 432480A ES 432480 A1 ES432480 A1 ES 432480A1
Authority
ES
Spain
Prior art keywords
stratum
sensitive adhesive
pressure
release properties
organosilicone
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.)
Expired
Application number
ES432480A
Other languages
English (en)
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of ES432480A1 publication Critical patent/ES432480A1/es
Expired legal-status Critical Current

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
    • 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
    • C08G77/42—Block-or graft-polymers containing polysiloxane sequences
    • C08G77/458—Block-or graft-polymers containing polysiloxane sequences containing polyurethane sequences
    • 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
    • C08G18/61—Polysiloxanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/40—Adhesives in the form of films or foils characterised by release liners
    • C09J7/401—Adhesives in the form of films or foils characterised by release liners characterised by the release coating composition
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2475/00—Presence of polyurethane
    • C09J2475/005—Presence of polyurethane in the release coating
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2483/00—Presence of polysiloxane
    • C09J2483/005—Presence of polysiloxane in the release coating
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2839—Web or sheet containing structurally defined element or component and having an adhesive outermost layer with release or antistick coating
    • 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
    • Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
    • Y10T428/2848—Three or more layers
    • 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.]
    • 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.]
    • Y10T428/31598—Next to silicon-containing [silicone, cement, etc.] layer
    • 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]
    • Y10T428/31652—Of asbestos
    • Y10T428/31663—As siloxane, silicone or silane

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Adhesive Tapes (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Laminated Bodies (AREA)
  • Polyurethanes Or Polyureas (AREA)
  • Paints Or Removers (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
ES432480A 1973-12-11 1974-11-30 Un metodo de fabricar material en hoja autoportantes. Expired ES432480A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/423,706 US3957724A (en) 1973-12-11 1973-12-11 Stratum having release properties and method of making

Publications (1)

Publication Number Publication Date
ES432480A1 true ES432480A1 (es) 1976-11-16

Family

ID=23679899

Family Applications (1)

Application Number Title Priority Date Filing Date
ES432480A Expired ES432480A1 (es) 1973-12-11 1974-11-30 Un metodo de fabricar material en hoja autoportantes.

Country Status (11)

Country Link
US (2) US3957724A (es)
JP (1) JPS51125159A (es)
AU (1) AU7623474A (es)
BE (1) BE823170A (es)
BR (1) BR7410319A (es)
DE (1) DE2458858C3 (es)
ES (1) ES432480A1 (es)
FR (1) FR2253621B1 (es)
GB (1) GB1486618A (es)
IT (1) IT1024387B (es)
ZA (1) ZA745363B (es)

Families Citing this family (82)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4002794A (en) * 1975-07-18 1977-01-11 Nashua Corporation Adhesive material and articles incorporating same
DE2629535C3 (de) * 1976-07-01 1979-10-11 Beiersdorf Ag, 2000 Hamburg Verfahren zur Herstellung von blatt- oder bahnförmigen Materialien, die mindestens auf einer Seite eine beschriftbare klebstoffabweisende Beschichtung tragen
JPS5374539A (en) * 1976-12-15 1978-07-03 Nitto Electric Ind Co Ltd Pressure sensitive adhesive
GB1589680A (en) * 1977-12-14 1981-05-20 Suzuka Paint Mfg Co Ltd Film material for forming blackboards
US4171397A (en) * 1978-04-17 1979-10-16 Minnesota Mining And Manufacturing Company Sheet material having composite fluorochemical-silicone release coatings
US4313988A (en) * 1980-02-25 1982-02-02 Minnesota Mining And Manufacturing Company Epoxypolysiloxane release coatings for adhesive materials
EP0046796B1 (en) * 1980-02-25 1984-08-01 Minnesota Mining And Manufacturing Company Epoxypolysiloxane release coatings for adhesive materials
US4985473A (en) * 1980-05-20 1991-01-15 Minnesota Mining And Manufacturing Company Compositions for providing abherent coatings
US4448939A (en) * 1982-07-30 1984-05-15 Air Products And Chemicals, Inc. Polyurethanes prepated using poly(silyldiamines)
US4511696A (en) * 1983-06-29 1985-04-16 Shell Oil Company Method for protectively coating a polymer
US4595615A (en) * 1984-10-05 1986-06-17 Venture Tape Corp. Pipe insulation for cold weather applications
US4728571A (en) * 1985-07-19 1988-03-01 Minnesota Mining And Manufacturing Company Polysiloxane-grafted copolymer release coating sheets and adhesive tapes
CH666899A5 (de) * 1986-05-09 1988-08-31 Sika Ag Reaktiver schmelzklebstoff.
US5214119A (en) * 1986-06-20 1993-05-25 Minnesota Mining And Manufacturing Company Block copolymer, method of making the same, dimaine precursors of the same, method of making such diamines and end products comprising the block copolymer
US4946732A (en) * 1987-09-15 1990-08-07 Venture Tape Corp. Insulation with tape adhering surface
CA1312408C (en) * 1987-10-09 1993-01-05 Peter W. Merz Reactive, thixotropic hot-melt adhesive on silane basis
US4832009A (en) * 1987-12-23 1989-05-23 Bio Med Sciences, Inc. Semi-interpenetrating network polymer backsheet bandage
US4822687A (en) * 1988-01-22 1989-04-18 Minnesota Mining And Manufacturing Company Silicone release compositions
GB8811868D0 (en) * 1988-05-19 1988-06-22 Ici Plc Release film
JPH0689273B2 (ja) * 1988-09-28 1994-11-09 関西ペイント株式会社 塗膜補修材料
US5089336A (en) * 1989-08-14 1992-02-18 Minnesota Mining And Manufacturing Company General purpose siloxane release coatings
US5202190A (en) * 1989-08-14 1993-04-13 Minnesota Mining And Manufacturing Company Method of making vinyl-silicone copolymers using mercapto functional silicone chain-transfer agents and release coatings made therewith
US5032460A (en) * 1989-08-14 1991-07-16 Minnesota Mining And Manufacturing Company Method of making vinyl-silicone copolymers using mercapto functional silicone chain-transfer agents and release coatings made therewith
US5225480A (en) * 1990-03-21 1993-07-06 Minnesota Mining And Manufacturing Company Water-borne low adhesion backsize and release coating compositions, methods of making the compositions, and sheet materials coated therewith
JPH0732042Y2 (ja) * 1990-03-28 1995-07-26 株式会社ピラミッド 離型性シート
KR100219954B1 (ko) * 1991-09-12 1999-09-01 스프레이그 로버트 월터 문양화된 압감접착제 전이 테이프
US5217805A (en) * 1991-10-15 1993-06-08 Minnesota Mining And Manufacturing Company Uv-curable silicon release compositions
EP0614472B1 (en) * 1991-11-27 1999-07-28 Minnesota Mining And Manufacturing Company Radiation curable saturated polyolefin pressure-sensitive adhesive
US5330840A (en) * 1992-05-28 1994-07-19 Eastman Kodak Company Polysiloxane containing polyurethane and coated articles useful as toner fusing members
US5859088A (en) * 1993-04-13 1999-01-12 Minnesota Mining And Manufacturing Company Radiation-curable poly(α-olefin) adhesives
CA2141527C (en) * 1994-03-24 2001-03-13 Dennis G. Fontanilla Butt strip tape for insulation application
US5853642A (en) * 1994-07-29 1998-12-29 Minnesota Mining And Manufacturing Company Process for the in-line polymerization of olefinic monomers
US5589246A (en) * 1994-10-17 1996-12-31 Minnesota Mining And Manufacturing Company Heat-activatable adhesive article
US5756572A (en) * 1995-07-24 1998-05-26 Dow Corning Corporation Silicone pressure sensitive adhesive composition containing thermoplastic multi-segmented copolymer
US6586082B1 (en) 1995-11-15 2003-07-01 3M Innovative Properties Company Polymer-saturated paper articles
US5910370A (en) * 1995-11-21 1999-06-08 Ici Americas Inc Polymeric film
US6507413B1 (en) * 1996-06-14 2003-01-14 3M Innovative Properties Company Display unit and method of displaying an image
US20030118771A1 (en) * 1997-02-06 2003-06-26 Downs John P. Roll of adhesive segments for use in an adhesive segment applicator apparatus and method of making the same
US20030164220A1 (en) * 1997-02-06 2003-09-04 Downs John P. Stand and pneumatic actuator for adhesive segment applicator apparatus
US7837815B2 (en) 1997-02-06 2010-11-23 Glue Dots International Llc Adhesive segment indexing method and apparatus and roll of adhesive segments for use therewith
US5935670A (en) 1997-02-06 1999-08-10 All-Pak Sales, Inc. Thermoplastic adhesive dispensing method and apparatus
US7195049B2 (en) * 1997-02-06 2007-03-27 Glue Dots International, Llc Handheld mechanical adhesive segment applicator apparatus and method
US6114022A (en) * 1997-08-11 2000-09-05 3M Innovative Properties Company Coated microporous inkjet receptive media and method for controlling dot diameter
BR9910015A (pt) 1998-04-29 2001-01-09 3M Innovative Properties Co Meio receptor e processos de fabricação de um meio receptor e de produção de uma imagem
US6221198B1 (en) 1998-06-09 2001-04-24 3M Innovative Properties Company Method of stabilizing films or membranes using adhesive as a reservoir
DE69909101T2 (de) 1998-06-15 2004-04-29 Minnesota Mining & Manufacturing Company, St. Paul Unidirektionaler graphischer mehrkomponentengegenstand
US6381212B1 (en) 1998-06-17 2002-04-30 Radio Frequency Systems, Inc. Power sharing amplifier system for amplifying multiple input signals with shared power amplifiers
US6352768B1 (en) 1999-03-02 2002-03-05 Avery Dennison Corporation Printable release coatings and stamp constructions
US6637124B2 (en) 1999-04-20 2003-10-28 3M Innovative Properties Company Adhesive measuring tape
US6524675B1 (en) 1999-05-13 2003-02-25 3M Innovative Properties Company Adhesive-back articles
CN1170693C (zh) * 1999-06-01 2004-10-13 3M创新有限公司 喷墨接受介质及其制法、成象喷墨接受介质、图象的制法
ATE246096T1 (de) 1999-06-01 2003-08-15 3M Innovative Properties Co Zufällig mikrogeprägte aufnahmemedien
US6824820B1 (en) 1999-06-07 2004-11-30 3M Innovative Properties Company Polyurea-based adhesives, articles therefrom and methods of their preparation and use
US6541089B1 (en) * 1999-08-24 2003-04-01 3M Innovative Properties Company Stretch releasing adhesive tape with integral pull tab
CA2398147A1 (en) * 2000-02-08 2001-08-16 3M Innovative Properties Company Ink fixing materials and methods of fixing ink
US20010031342A1 (en) * 2000-02-08 2001-10-18 Engle Lori P. Media for cold image transfer
US20020052439A1 (en) * 2000-08-08 2002-05-02 3M Innovative Properties Company Ink receptive compositions and articles for image transfer
US6874421B2 (en) 2001-04-20 2005-04-05 3M Innovative Properties Company Ink jet transfer printing process
US20040202812A1 (en) * 2001-09-07 2004-10-14 Congard Pierre M. Photoluminescent adhesive tape
EP1438196A1 (en) * 2001-10-22 2004-07-21 3M Innovative Properties Company Transfer printing process and transfer printing sheet
US6753080B1 (en) * 2002-01-29 2004-06-22 3M Innovative Properties Company Receptor medium having a microfibrillated surface
US20030219552A1 (en) * 2002-02-19 2003-11-27 Graham Paul D. Polyvinylpyridine image receptive material
US20030221770A1 (en) * 2002-05-28 2003-12-04 3M Innovative Properties Company Segmented curable transfer tapes
TW591047B (en) * 2002-11-19 2004-06-11 Chung Shan Inst Of Science Process for preparing poly(urea-urethane)
US20050126692A1 (en) * 2003-12-09 2005-06-16 Hajny Roger V. System and method for advancing thermoplastic adhesive segment dispensing tape and applying adhesive segments thereby
US8006734B2 (en) 2003-12-09 2011-08-30 Glue Dots International Llc System and method for advancing thermoplastic adhesive segment dispensing tape and applying adhesive segments thereby
US20050130527A1 (en) * 2003-12-11 2005-06-16 3M Innovative Properties Company UV stabilized fibrous articles and method of making the same
CN200957678Y (zh) * 2004-01-08 2007-10-10 艾利丹尼森公司 复合制品及冲切标签
US20050186416A1 (en) * 2004-02-25 2005-08-25 3M Innnovative Properties Company Hydrophilic articles
US20050249791A1 (en) * 2004-05-07 2005-11-10 3M Innovative Properties Company Antimicrobial articles
US20050255275A1 (en) * 2004-05-14 2005-11-17 Downs John P Adhesive dispensing tape including a transparent carrier material
US20060013983A1 (en) * 2004-07-15 2006-01-19 3M Innovative Properties Company Adhesive delivery of oil and water repellents
US20060029799A1 (en) * 2004-08-03 2006-02-09 3M Innovative Properties Company Adhesive delivery of fluoroether repellents
CA2613447C (en) * 2005-06-20 2012-10-16 Bridgestone Firestone Diversified Products, Llc Method of manufacturing thermoplastic membrane articles and methods of use
US20070014955A1 (en) * 2005-07-14 2007-01-18 Green Bay Packaging Inc. Printable polylactide film material, methods and labels made therefrom
MX2008002466A (es) * 2005-08-22 2008-09-18 Bridgestone Firestone Diversif Sistema de cubierta resistente a incendios.
EP1984417A2 (de) * 2006-02-03 2008-10-29 Basf Se Durch energieeintrag reparable beschichtungen
US20080092457A1 (en) * 2006-03-31 2008-04-24 Marilyn Malone Articles for Selecting Colors for Surfaces
KR20140002619A (ko) 2010-08-27 2014-01-08 쓰리엠 이노베이티브 프로퍼티즈 컴파니 레이저 인쇄가능한 매체 및 이를 사용하기 위한 방법
USD708666S1 (en) 2011-11-18 2014-07-08 Glue Dots International, Llc Dispenser
US10889736B2 (en) 2014-03-30 2021-01-12 Omnova Solutions Inc. Low VOC polymers with release properties
KR102280585B1 (ko) * 2021-01-15 2021-07-23 씰테크 주식회사 반도체 패키지용 이형 필름 및 그 제조 방법

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US2907782A (en) * 1956-10-12 1959-10-06 Union Carbide Corp Organosilicon ureas and processes for producing the same
US3178391A (en) * 1958-10-31 1965-04-13 Bayer Ag Isocyanates and isothiocyanates and a process for producing the same
US3179622A (en) * 1962-03-26 1965-04-20 Dow Corning Polysiloxane isocyanates
US3246048A (en) * 1962-09-14 1966-04-12 Dow Corning Organosiloxane-polyether urethanes
DE1619030A1 (de) * 1966-09-24 1969-08-21 Bayer Ag Verfahren zur Veredlung von Textilmaterialien
DE1745526B2 (de) * 1967-03-16 1980-04-10 Union Carbide Corp., New York, N.Y. (V.St.A.) Verfahren zur Herstellung vulkanisierbarer, unter wasserfreien Bedingungen beständiger Polymerisate
US3503782A (en) * 1967-05-29 1970-03-31 Phillips Petroleum Co Differential release paper
US3565750A (en) * 1969-05-19 1971-02-23 Minnesota Mining & Mfg Pressure-sensitive adhesive article with dry-strippable liner
US3624010A (en) * 1970-02-12 1971-11-30 Gen Electric Silicone foams
US3690924A (en) * 1970-10-05 1972-09-12 Grace W R & Co Pressure sensitive adhesive articles having a release coating
US3749593A (en) * 1971-09-24 1973-07-31 Phillips Petroleum Co Laminated materials and method of preparation

Also Published As

Publication number Publication date
DE2458858B2 (de) 1978-06-29
BE823170A (fr) 1975-06-10
US3957724A (en) 1976-05-18
JPS51125159A (en) 1976-11-01
DE2458858A1 (de) 1975-06-12
AU7623474A (en) 1976-06-10
BR7410319A (pt) 1976-06-29
GB1486618A (en) 1977-09-21
IT1024387B (it) 1978-06-20
FR2253621A1 (es) 1975-07-04
ZA745363B (en) 1975-08-27
FR2253621B1 (es) 1977-03-25
JPS5427868B2 (es) 1979-09-12
US3997702A (en) 1976-12-14
DE2458858C3 (de) 1979-03-22

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