MX169974B - Fibras de poliimida resistentes a altas temperaturas de combustion lenta - Google Patents

Fibras de poliimida resistentes a altas temperaturas de combustion lenta

Info

Publication number
MX169974B
MX169974B MX015044A MX1504489A MX169974B MX 169974 B MX169974 B MX 169974B MX 015044 A MX015044 A MX 015044A MX 1504489 A MX1504489 A MX 1504489A MX 169974 B MX169974 B MX 169974B
Authority
MX
Mexico
Prior art keywords
fibers
high temperatures
polyimide fibers
heat treatment
slow combustion
Prior art date
Application number
MX015044A
Other languages
English (en)
Inventor
Klaus Dr Weinrotter
Robert Dipl Ing Vodiunig
Original Assignee
Chemiefaser Lenzing 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 Chemiefaser Lenzing Ag filed Critical Chemiefaser Lenzing Ag
Publication of MX169974B publication Critical patent/MX169974B/es

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/006—Pressing and sintering powders, granules or fibres
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/24—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 characterised by the choice of material
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/74—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polycondensates of cyclic compounds, e.g. polyimides, polybenzimidazoles
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/04—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres
    • D04H1/06—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres having existing or potential cohesive properties, e.g. natural fibres, prestretched or fibrillated artificial fibres by treatment to produce shrinking, swelling, crimping or curling of fibres
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4326—Condensation or reaction polymers
    • D04H1/4334—Polyamides
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/50—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by treatment to produce shrinking, swelling, crimping or curling of fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2079/00—Use of polymers having nitrogen, with or without oxygen or carbon only, in the main chain, not provided for in groups B29K2061/00 - B29K2077/00, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25—Solid
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S264/00—Plastic and nonmetallic article shaping or treating: processes
    • Y10S264/71—Processes of shaping by shrinking
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3472—Woven fabric including an additional woven fabric 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3976—Including strand which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous composition, water solubility, heat shrinkability, etc.]
    • Y10T442/3984—Strand is other than glass and is heat or fire resistant
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • 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.]
    • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
    • Y10T442/488—Including an additional knit fabric 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
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/659—Including an additional nonwoven fabric
    • Y10T442/671—Multiple nonwoven fabric layers composed of the same polymeric strand or fiber material
    • 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.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/682—Needled nonwoven fabric
    • Y10T442/684—Containing at least two chemically different strand or fiber materials
    • Y10T442/688—Containing polymeric strand or fiber material
    • 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.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/69—Autogenously bonded nonwoven 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.]
    • Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
    • Y10T442/696—Including strand or fiber material which is stated to have specific attributes [e.g., heat or fire resistance, chemical or solvent resistance, high absorption for aqueous compositions, water solubility, heat shrinkability, etc.]

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Nonwoven Fabrics (AREA)
  • Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
  • Reinforced Plastic Materials (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Inorganic Fibers (AREA)
  • Insulated Conductors (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)

Abstract

La presente invención se refiere a fibras de poliimida resistentes a altas temperaturas, de combustión lenta, sobre la base de unidades estructurales de la fórmula general: caracterizadas porque bajo la acción del calor desarrollan una fuerza de retracción de 0,3 a 1,1 cN; porque bajo la acción del calor presentan una retracción de las fibras del 20 al 60 por ciento y porque contienen componentes de bajo peso molecular del grupo que comprende disolventes y oligómeros en una cantidad del 0,5 al 3 por ciento, produciendose, bajo la acción del calor, uniones cohesivas entre fibras individuales.
MX015044A 1988-02-26 1989-02-23 Fibras de poliimida resistentes a altas temperaturas de combustion lenta MX169974B (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0049588A AT391710B (de) 1988-02-26 1988-02-26 Schwer entflammbare hochtemperaturbestaendige polyimidfasern und formkoerper daraus

Publications (1)

Publication Number Publication Date
MX169974B true MX169974B (es) 1993-08-03

Family

ID=3492117

Family Applications (1)

Application Number Title Priority Date Filing Date
MX015044A MX169974B (es) 1988-02-26 1989-02-23 Fibras de poliimida resistentes a altas temperaturas de combustion lenta

Country Status (22)

Country Link
US (2) US5271889A (es)
EP (1) EP0362312B1 (es)
JP (1) JP2935864B2 (es)
KR (1) KR900700668A (es)
AT (2) AT391710B (es)
AU (1) AU629815B2 (es)
BR (1) BR8905705A (es)
CA (1) CA1335149C (es)
DK (1) DK534389A (es)
ES (1) ES2013663A6 (es)
FI (1) FI95727C (es)
HU (1) HU891285D0 (es)
IE (1) IE62061B1 (es)
IL (1) IL89399A (es)
MX (1) MX169974B (es)
NO (1) NO176148C (es)
NZ (1) NZ228126A (es)
PT (1) PT89840B (es)
RU (1) RU2075563C1 (es)
TR (1) TR26459A (es)
WO (1) WO1989008161A1 (es)
ZA (1) ZA891414B (es)

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JP2662735B2 (ja) * 1988-09-10 1997-10-15 市川毛織株式会社 耐熱性フェルト
AT392280B (de) * 1989-02-15 1991-02-25 Chemiefaser Lenzing Ag Verfahren zur herstellung von neuen, schwer entflammbaren, thermostabilen homopolyimiden, homopolyimiden, formkoerper und fasern daraus
AT391446B (de) * 1989-04-06 1990-10-10 Chemiefaser Lenzing Ag Hochtemperaturbestaendige stapelauflage, verfahren zu ihrer herstellung und ihre verwendung
AT394589B (de) * 1989-04-13 1992-05-11 Chemiefaser Lenzing Ag Verfahren zur herstellung schwer entflammbarer, hochtemperaturbestaendiger formkoerper auf basis von polyimiden
AT394050B (de) * 1990-07-24 1992-01-27 Chemiefaser Lenzing Ag Schwer entflammbarer, hochtemperaturbestaendiger formkoerper auf basis von polyimidfasern, sowie verfahren zu seiner herstellung
JP3300529B2 (ja) * 1994-03-31 2002-07-08 日鉄鉱業株式会社 帯電防止性のある濾過材とその製造方法
CA2144298A1 (en) * 1994-07-12 1996-01-13 Hiroyuki Yanagihara Reinforced filter element
US6784234B2 (en) * 1998-10-07 2004-08-31 General Electric Company High performance plastic pallets
US6610242B1 (en) * 2000-11-13 2003-08-26 Malcolm Swanson Method for treating polymeric fiber mats and for making filters from such treated fiber mats
US6946412B2 (en) * 2001-05-09 2005-09-20 Glen Raven, Inc. Flame-resistant, high visibility, anti-static fabric and apparel formed therefrom
US6706650B2 (en) 2001-05-09 2004-03-16 Glen Raven, Inc. Flame-resistant and high visibility fabric and apparel formed therefrom
US7419922B2 (en) * 2001-05-09 2008-09-02 Gibson Richard M Flame-resistant, high visibility, anti-static fabric and apparel formed therefrom
US6787228B2 (en) * 2001-05-09 2004-09-07 Glen Raven, Inc. Flame-resistant and high visibility fabric and apparel formed therefrom
AT501730B1 (de) * 2002-10-14 2006-11-15 Miba Frictec Gmbh Reibbelag
US9617669B2 (en) 2007-10-26 2017-04-11 Kaneka Corporation Method of making polyimide fiber assembly
JP7141334B2 (ja) * 2016-03-30 2022-09-22 株式会社クラレ 耐熱性繊維構造体
JP2019218659A (ja) * 2018-06-20 2019-12-26 株式会社ダイセル 超耐熱性を有する繊維、及び布
CN111501200B (zh) * 2020-01-03 2021-05-07 北京化工大学 一种聚硅氧烷酰亚胺微纳多孔纤维无纺布的制备方法
KR102500606B1 (ko) * 2022-04-11 2023-02-16 피아이첨단소재 주식회사 폴리이미드 분말의 제조방법 및 이에 의해 제조된 폴리이미드 분말
CN115652574A (zh) * 2022-10-11 2023-01-31 中国人民解放军93114部队 用于提高絮料蓬松度的方法及絮料和飞行服

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Also Published As

Publication number Publication date
IE890611L (en) 1989-08-26
US5486412A (en) 1996-01-23
IL89399A0 (en) 1989-09-10
FI95727B (fi) 1995-11-30
EP0362312B1 (de) 1993-05-12
WO1989008161A1 (en) 1989-09-08
BR8905705A (pt) 1990-11-20
ZA891414B (en) 1989-11-29
NO894253D0 (no) 1989-10-25
DK534389D0 (da) 1989-10-26
RU2075563C1 (ru) 1997-03-20
DK534389A (da) 1989-10-26
AU629815B2 (en) 1992-10-15
TR26459A (tr) 1994-02-16
FI894987A0 (fi) 1989-10-19
FI95727C (fi) 1996-03-11
ES2013663A6 (es) 1990-05-16
CA1335149C (en) 1995-04-11
NO176148B (no) 1994-10-31
IE62061B1 (en) 1994-12-14
NO894253L (no) 1989-12-21
JPH02503333A (ja) 1990-10-11
HU891285D0 (en) 1990-04-28
PT89840A (pt) 1989-10-04
NO176148C (no) 1995-02-08
IL89399A (en) 1993-06-10
PT89840B (pt) 1994-01-31
US5271889A (en) 1993-12-21
NZ228126A (en) 1991-02-26
ATA49588A (de) 1990-05-15
JP2935864B2 (ja) 1999-08-16
EP0362312A1 (de) 1990-04-11
KR900700668A (ko) 1990-08-16
ATE89341T1 (de) 1993-05-15
AU3061789A (en) 1989-09-22
AT391710B (de) 1990-11-26

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