FI114321B - Fiberbindemedel för torrbindning av fibermaterial, dess användning vid framställning av formstycken och förfarande för torkning av fibermaterial - Google Patents

Fiberbindemedel för torrbindning av fibermaterial, dess användning vid framställning av formstycken och förfarande för torkning av fibermaterial Download PDF

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Publication number
FI114321B
FI114321B FI954129A FI954129A FI114321B FI 114321 B FI114321 B FI 114321B FI 954129 A FI954129 A FI 954129A FI 954129 A FI954129 A FI 954129A FI 114321 B FI114321 B FI 114321B
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Finland
Prior art keywords
fibers
fiber
meth
weight
vinyl
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FI954129A
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English (en)
Finnish (fi)
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FI954129A (sv
FI954129A0 (sv
Inventor
Joachim Schulze
Konrad Alfons Wierer
Johannes Kinkel
Gerhard Brink
Walter Ernet
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Wacker Chemie Gmbh
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Publication of FI954129A0 publication Critical patent/FI954129A0/sv
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Publication of FI114321B publication Critical patent/FI114321B/sv

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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
    • D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/587—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B26/00—Compositions of mortars, concrete or artificial stone, containing only organic binders, e.g. polymer or resin concrete
    • C04B26/02—Macromolecular compounds
    • C04B26/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B26/06—Acrylates
    • 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
    • D04H1/4209—Inorganic fibres
    • D04H1/4218—Glass 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
    • D04H1/4266—Natural fibres not provided for in group D04H1/425
    • 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
    • D04H1/435—Polyesters
    • 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
    • D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • 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
    • D04H1/58—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/60—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 by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/263—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acids; Salts or esters thereof
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/285—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides
    • D06M15/29—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated carboxylic acid amides or imides containing a N-methylol group or an etherified N-methylol group; containing a N-aminomethylene group; containing a N-sulfidomethylene group
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
    • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
    • D06M15/21—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06M15/327—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof
    • D06M15/333—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds of unsaturated alcohols or esters thereof of vinyl acetate; Polyvinylalcohol
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M23/00—Treatment of fibres, threads, yarns, fabrics or fibrous goods made from such materials, characterised by the process
    • D06M23/08—Processes in which the treating agent is applied in powder or granular form
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/0045—Polymers chosen for their physico-chemical characteristics
    • C04B2103/0057—Polymers chosen for their physico-chemical characteristics added as redispersable powders

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Textile Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Nonwoven Fabrics (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Adhesives Or Adhesive Processes (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Chemical Treatment Of Fibers During Manufacturing Processes (AREA)
  • Artificial Filaments (AREA)
  • Reinforced Plastic Materials (AREA)

Claims (8)

1. Fiberbindemedel för torrbindning av fibermaterial, som innehäller pä vinylester-kopolymerater eller (met)akrylsyraesterkopolymerater baserade tvärbundna, redis- 5 pergerande dispersionspulver, kännetecknat därav, att vinylesterkopolymeraterna innehäller en eller flera monomerer, som utgörs av oförgrenade eller förgrenade, 1-15 C-atomer innehlllande alkylkarboxylsyrors vinylestrar, eller (met)akrylsyraester-kopolymerat av en eller flera monomerer, som utgörs av 1-10 C-atomer innehällan-de alkoholers metakrylsyraestrar och akrylsyraestrar, varvid vinylester- och 10 (met)akrylsyraesterkopolymeraten innehäller respektive 0,1-10 vikt-%, baserad pä kopolymeratets totalvikt, en eller flera etyleniskt omättad, tvärbindande verkande komonomer.
2. Fiberbindemedel enligt patentkravet 1, kännetecknat därav, att det innehäller 15 en eller flera tvärbindnade verkande komonomerer ur gruppen akrylamidoglykolsyra (AGA), metylakrylamidoglykolatmetyleter (MAGME), N-metylolakrylamid (NMAA), N-metylolmetakrylamid, N-metylolallylkarbamat, alkyletrar, säsom isobutyleter eller estrar av N-metylolakrylamid, N-metylolmetakrylamid eller N-metylolallylkarbamat.
3. Fiberbindemedel enligt patentkravet 1, kännetecknat därav, att vinylesterko- polymeraten innehäller 70-95 vikt-% vinylacetat, 5-25 vikt-% etylen och/eller : : 5-30 vikt-% di-isopropylfumarat och 0,1-10,0 vikt-% N-metylol(met)akrylamid, eller ; ’1,: 50-70 vikt-% vinylacetat, 10-30 vikt-% VeoVa9R och/eller VeoVal0R, 5-25 vikt-% : · i etylen och 0,1-10,0 vikt-% N-metylol(met)akrylamid, eller : · 25 15-50 vikt-% vinylacetat, 30-65 vikt-% vinylklorid och/eller di-isopropylfumarat, :5-25 vikt-% etylen och 0,1-10 vikt-% N-metylol(met)akrylamid, eller i'; 50-70 vikt-% vinylacetat, 1-30 vikt-% n-butylakrylat eller 2-etylhexylakrylat, 5-25 vikt-% etylen och 0,1-10,0 vikt-% N-metylol(met)akrylamid. ;‘ : 30
4. Fiberbindemedel enligt patentkravet 1, kännetecknad därav, att (met)akryl- . \ syraester-kopolymeraten innehäller 30-70 vikt-% metylmetakrylat, 70-30 vikt-% M n-butylakrylat och/eller 2-etylhexylakrylat och 0,1-10 vikt-% N-metylol(met)akryl- • * amid, eller 4 a v.: 30-70 vikt-% styren och 70-30 vikt-% n-butylakrylat och/eller 2-etylhexylakrylat och 35 0,1-10 vikt-% N-metylol(met)akrylamid. 15 114321
5. Förfarande för torkning av fibermaterial, kännetecknat därav, att 5-50 vikt-%, av fiberns vikt, fiberbindemedel enligt patentkravet 1-4 strös, utbreds eller skakas, eventuellt i mekaniskt förhärdat fibermaterial eller blandas direkt med fibrerna, fuk-tas, före ströandet eller därefter, med 5-60 vikt-% vatten, baserad pä totalvikten av 5 fibrernas och bindemedlets torrblandning, och ytformationen eller formstycket upp-värms för att binda fibrerna under tryck av högst 10 MPa (100 bar) vid 100-200°C.
6. Förfarande enligt av patentkraven 5, kännetecknat därav, att efter ströandet av fiberbindemedel pä de fuktiga fibrerna, avlägsnas vatten genom uppvärmning av 10 fiberformationen i en luftström vid 80-100°C, och att fibern sprutas pä nytt med angiven vattenmängd före den termiska tvärbindningen.
7. Förfarande enligt av patentkravet 5 eller 6, kännetecknat därav, att som fibermaterial används träfiber, cellulosafibrer, ull, bomull, mineralfiber, keramikfibrer, pä 15 fibrer bildande polymerer baserade syntetfibrer slsom viskosfibrer, polyetylen-, po-lypropylen-, polyester-, polyamid-, polyakrylnitril- eller kolfibrer, fibrer av vinylklorids homo- och kopolymerater eller tetrafluoretylens homo- eller kopolymeraters fibrer.
8. Användningen av fiberbindemedel enligt patentkrav 1-4 för framställning av 20 formdelar av fibermaterial, bindning av glasfibret, bindning av vaddar, framställning av fibermattor av fibrer, och framställning av nälade filtar. > · : · * · « · • 1 « > » » 1 f I t f t | • ll|‘ • < t • 4 • 1 t I I • I • 1 · • > · • t • i i » i • · • f » • » > > · • I · • I I I I f » » ·
FI954129A 1993-03-04 1995-09-04 Fiberbindemedel för torrbindning av fibermaterial, dess användning vid framställning av formstycken och förfarande för torkning av fibermaterial FI114321B (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4306808 1993-03-04
DE4306808A DE4306808A1 (de) 1993-03-04 1993-03-04 Vernetzbare Dispersionspulver als Bindemittel für Fasern
PCT/EP1994/000625 WO1994020661A1 (de) 1993-03-04 1994-03-03 Vernetzbare dispersionspulver als bindemittel für fasern
EP9400625 1994-03-03

Publications (3)

Publication Number Publication Date
FI954129A FI954129A (sv) 1995-09-04
FI954129A0 FI954129A0 (sv) 1995-09-04
FI114321B true FI114321B (sv) 2004-09-30

Family

ID=6481951

Family Applications (1)

Application Number Title Priority Date Filing Date
FI954129A FI114321B (sv) 1993-03-04 1995-09-04 Fiberbindemedel för torrbindning av fibermaterial, dess användning vid framställning av formstycken och förfarande för torkning av fibermaterial

Country Status (20)

Country Link
US (2) US5668216A (sv)
EP (1) EP0687317B1 (sv)
JP (1) JP2739611B2 (sv)
KR (2) KR960700627A (sv)
CN (1) CN1094145C (sv)
AT (1) ATE145258T1 (sv)
AU (1) AU675704B2 (sv)
BR (1) BR9405880A (sv)
CA (1) CA2161119C (sv)
CZ (1) CZ287541B6 (sv)
DE (2) DE4306808A1 (sv)
ES (1) ES2094054T3 (sv)
FI (1) FI114321B (sv)
HU (1) HU214051B (sv)
NO (1) NO180805C (sv)
PL (1) PL173357B1 (sv)
RU (1) RU2101404C1 (sv)
SK (1) SK281475B6 (sv)
UA (1) UA40610C2 (sv)
WO (1) WO1994020661A1 (sv)

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AU6257694A (en) 1994-09-26
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US5668216A (en) 1997-09-16
US5886121A (en) 1999-03-23
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CN1094145C (zh) 2002-11-13
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NO180805B (no) 1997-03-24
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FI954129A (sv) 1995-09-04
ATE145258T1 (de) 1996-11-15
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HU9501513D0 (en) 1995-07-28
FI954129A0 (sv) 1995-09-04
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HU214051B (en) 1997-12-29

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