EP0753624B1 - Imprägnierte Folien für die Beschichtung von Holzwerkstoffen - Google Patents
Imprägnierte Folien für die Beschichtung von Holzwerkstoffen Download PDFInfo
- Publication number
- EP0753624B1 EP0753624B1 EP96110652A EP96110652A EP0753624B1 EP 0753624 B1 EP0753624 B1 EP 0753624B1 EP 96110652 A EP96110652 A EP 96110652A EP 96110652 A EP96110652 A EP 96110652A EP 0753624 B1 EP0753624 B1 EP 0753624B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- impregnated
- weight
- substrate material
- aqueous solution
- films
- 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 - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
- D21H17/375—Poly(meth)acrylamide
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/47—Condensation polymers of aldehydes or ketones
- D21H17/49—Condensation polymers of aldehydes or ketones with compounds containing hydrogen bound to nitrogen
- D21H17/51—Triazines, e.g. melamine
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
- D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
- D21H23/22—Addition to the formed paper
- D21H23/70—Multistep processes; Apparatus for adding one or several substances in portions or in various ways to the paper, not covered by another single group of this main group
- D21H23/72—Plural serial stages only
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/18—Paper- or board-based structures for surface covering
- D21H27/22—Structures being applied on the surface by special manufacturing processes, e.g. in presses
- D21H27/26—Structures being applied on the surface by special manufacturing processes, e.g. in presses characterised by the overlay sheet or the top layers of the structures
Definitions
- the invention relates to impregnated films which this method are available and their use for coating of laminates.
- foils are needed that can for coating wood-based materials such as chipboard, plywood and wood fiber boards are suitable and this a protective and decorative Give surface.
- the melamine-formaldehyde condensation product with which the foils are impregnated are cured to a highly cross-linked polymer.
- the impregnated films are generally cured at elevated temperature and is said to allow the processing of the impregnated Foils can be carried out as economically as possible, take only a short time.
- the Melamine-formaldehyde condensation products with which the carriers be impregnated, hardener added are added.
- DE-A-2135072 proposes mixtures of polymer dispersions from acrylic esters and acrylamides for the production of use elasticized foils.
- the object of the present invention was therefore to impregnate new ones To provide films and processes for their production, with which hard and at the same time elastic surface coatings can be produced and in particular the graying effect described does not occur.
- Acrylamide is capable of carrying a hydroxyl group, a carboxyl group, a sulfonic acid group, optionally mono- or disubstituted carbamoyl groups with C 1 -C 4 -alkyl groups or a carbonyldioxy group, and preferably 0 to 20, particularly preferably 0 to 10% by weight of the monomers (a1) and (b1.1) different monomers (monomers b1.2) which are copolymerizable with acrylamide.
- the monomers (b1.1) also include those monomers in which the carboxyl group or the sulfonic acid group in the salt form is transferred.
- the cations here include, for example Alkali metal ions prefer sodium and potassium and that Ammonium ion into consideration.
- monomers (b1.1) which have a solubility of at least 100 g / l in water (measured at 25 ° C).
- the monomers (b1.2) are, above all, styrene, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate, the (C 1 -C 4 -alkyl) esters of acrylic acid, the (C 1 -C 4 -alkyl) esters of methacrylic acid and the (C 1 - to C 4 alkyl) mono- and diesters of maleic and fumaric acid into consideration.
- the K value of the polymers (P) is usually 6 to 300, preferably 7 to 150, particularly preferably 8 to 50, the K values on those in Encyclopedia of Chemical Technology, Third Edition, John Wiley and Sons, Inc 1983, Volume 23, pages 967 and Obtain the specified measurement method.
- K kx 10 3 . Measurements are made in the K value range from 6 to 20 as 5% by weight, in the K value range from 20 to 100 as 1% by weight and with K values of more than 100 than 0.1 % solutions.
- the polymers (P) are generally prepared by known methods Radical polymerization processes, e.g. of the Solution, precipitation, emulsion or suspension polymerization, solution polymerization in water is preferred.
- radical donors e.g. Per compounds, azo compounds as well as redox systems.
- Initiators such as hydrogen peroxide, sodium, potassium and ammonium persulfates and all water-soluble azo initiators used.
- Soluble iron, copper, Vanadium salts and reducing agents such as sodium hydrogen sulfite, Sodium dithionite, ascorbic acid and glucose, for example in Consideration.
- Suitable regulators are, for example, 2-mercaptoethanol, Mercaptopropanol, thioglycolic acid, thiolactic acid, dodecyl mercaptan as well as sec. Alcohols such as isopropanol and sec.
- the controllers are usually in amounts of 0.1 to 50 wt .-%, based on the total amount of monomers (a1) and (b1) in the polymerization of the monomers added.
- Polymers (P) with a K value of 8 to 50 using a regulator are produced, particularly suitable.
- aqueous Solutions of the polymer (P) used preferably 5 to 25, particularly preferably contain 10 to 20% by weight of the polymer (P).
- the starting carrier (I) is usually preferred with 4 to 8.5 with 5.5 to 7.5 g of the polymer (P), per 100 grams of the Base material (I) impregnated by adding 100 g of base material (I) an aqueous solution containing the polymer (P) contains in the specified amounts, can act.
- the way of impregnation is not critical.
- the starting material (I) can, for example, in an aqueous solution of the polymer (P) are immersed or the aqueous solution of the Polymers (P) can be sprayed onto the starting material (I) will.
- aqueous solution of the polymer (P) impregnated starting material (I) has a water content of less than 4 wt .-%, based on the solids content of the the starting solution impregnated with the aqueous solution of the polymer (P) (I), if in the following step II impregnated with the melamine-formaldehyde condensation product becomes.
- the water content is preferably less than 3% by weight.
- the solids content can be determined, for example, by one from a sample of the with the aqueous solution of the polymer (P) impregnated starting carrier material (I) determines the weight, the sample dries in a forced air drying cabinet at 150 ° C for 1 hour, the dried sample weighs again and based on the weight difference calculated the water content.
- step I The carrier materials obtained in step I (starting carrier materials II) in a subsequent step II with a water-impregnated with a melamine-formaldehyde condensation solution.
- melamine-formaldehyde condensation products in the following text "condensation products” for short
- condensation products are generally known (cf. Ullmann's Encyclopedia of Technical Chemistry, 4th Edition, Volume 7, Pages 403 to 422 or Kunststoff-Handbuch, 2nd edition, 1988, Volume 10, pages 41 to 49.
- the amounts of components (a2), (b2), (c2) are chosen such that the molar ratio of the —NH 2 groups originally present in components (a1), (a3) and (a4) to component (a2) 0.1: 1 to 0.8: 1, preferably 0.4: 1 to 0.6: 1.
- the melamine (component a2) is preferably used in solid form.
- the formaldehyde (component b2) is preferably in the form of a 30 to 50% by weight aqueous solution or in the form of paraformaldehyde used.
- Component (c2) are urea and guanamines such as benzoguanamine and acetoguanamine.
- Bisguanamines such as adipo-, glutaro- or methylolglutarobisguanamine and compounds which contain several e.g. also contain condensed aminotriazine cores suitable.
- the urea is preferably in the form of a concentrated aqueous Solution of urea and formaldehyde (component a2), the from DE-A-2451990 and EP-A-0083427 are used.
- urea and formaldehyde component a2
- These solutions from 3.0 to 6.0, preferably 3.5 to 4.5 mol Formaldehyde per mole of urea, preferably have a solids content according to DIN 12605 from 50 to 85, preferably from 60 to 80 % By weight. They contain some of the urea and formaldehyde in free monomeric form, partly in the form of reaction products such as methylolureas or low molecular weight condensation products.
- the conversion of the starting compounds to the condensation products usually takes place at a pH of 7 to 10, preferably from 8.5 to 9.2 and a reaction temperature of 60 to 110, preferably from 90 to 100 ° C.
- the implementation can be finished by lowering the reaction mixture to temperatures below 50 ° C, preferably to 20 to 30 ° C cools. It will generally worked at normal pressure.
- Aqueous solutions of the condensation products with a solids content of 45 to 55% by weight and a viscosity of 20 to 80 mPas (based on a temperature of 20 ° C. and a shear rate of 100 s ) are particularly suitable for producing the impregnated films according to the invention . 1 ).
- the aqueous solutions of the condensation products are generally mixed with a component which accelerates the hardening.
- a component which accelerates the hardening are, for example, the generally known hardeners or reaction products of aliphatic amines such as dimethylethanolamine with SO 2 .
- the hardener is generally added to the aqueous solution of the condensation product in amounts of 0.1 to 1% by weight.
- the hardener is advantageous for them immediately before impregnation the carrier materials (I) added.
- aqueous solution of the condensation products also commonly used auxiliaries of the prior art become, e.g. Antifoam and wetting agents, e.g. polyethoxylated alcohols.
- the impregnation of the carrier materials (I) is advantageously taken following a procedure like that for impregnation the starting support materials (I) with the aqueous solution of the polymer (P) is described.
- the starting carrier material (II) is usually 100 to 130, preferably with 110 to 120 g of the condensation product, per 100 Grams of the starting carrier (II) impregnated by each 100 g of starting material (II) an aqueous solution that the Contains condensation product in the specified amounts leaves.
- impregnated films according to the invention provided they have a water content of more than 7.0% by weight have their solids content before further processing to dry.
- Impregnated have particularly favorable processing properties Films with a water content of 5 to 7 and especially 5.5 to 6.5% by weight.
- the films impregnated according to the invention are suitable for the Coating of laminated materials such as chipboard, wood fiber board, Blockboards and for coating wood and Plastic.
- the impregnated foils optionally in several layers on top of each other, at an elevated temperature Pressed on materials.
- the temperature is usually 120 up to 220 ° C, the pressure 8 to 22 bar and the pressing time 8 to 55 sec.
- a white decorative paper with a weight of 80 g / m 2 was impregnated with a 15% strength by weight aqueous solution of polyacrylamide with a K value of 17 by dipping and dried at 140 ° C. after excess polymer solution had previously been removed by knife coating was.
- the dried paper (carrier material) had a water content of 3.5% by weight and contained 7.5 g of polyacrylamide per m 2 .
- the paper treated in this way was then impregnated with an aqueous solution of a melamine resin (molar ratio melamine: formaldehyde 1: 1.6), which had a viscosity of 42 mPa ⁇ s (20 ° C), and at 140-160 ° C in one Non-contact drying duct dried on air cushions.
- the resulting decorative film contained 98 g of solid melamine resin per m 2 and had a water content of 6.5% by weight. To determine the solids content, the materials were dried for 2 hours at 120 ° C. in a forced
- test results are listed in Table 1 below.
- example 1 2nd 3 (V) without PAA Degree of hardening a) 190 ° C / 35 s 2nd 2nd 2nd b) 230 ° C / 11 s 1 1 1 Gloss ⁇ 20 ° a) 190 ° C / 35 s 72 70 54 b) 230 ° C / 11 s 78 74 58 Crack resistance at 170 ° C / 6 min 1 0 6
- a black decorative paper with a weight of 90 g / m 2 was impregnated with a 15% strength by weight aqueous solution of polyacrylamide with a K value of 11 by dipping and dried at 140 ° C. after excess polymer solution had been removed by doctor blade .
- the dried paper (carrier material) had a water content of 3.7% by weight and contained 7.5 g of polyacrylamide per square meter.
- the paper treated in this way was treated with an aqueous solution of a melamine resin (molar ratio melamine: formaldehyde 1: 1.6, solids content 55%, viscosity 48 mPa ⁇ s (20 ° C)), which additionally contains 0.2% by weight of wetting agent ( a polyethoxylated alcohol (Kauropal (R) 930/931)) and 0.5 wt .-% hardener (dimethylethanolamine with SO 2 (hardener 529 / BASF Aktiengesellschaft)), impregnated.
- wetting agent a polyethoxylated alcohol (Kauropal (R) 930/931)
- hardener dimethylethanolamine with SO 2 (hardener 529 / BASF Aktiengesellschaft)
- the films thus obtained were as in Example 1, point 1.1. and 1.2. processed.
- Example 4 The procedure was analogous to Example 4, but the black one Decorative paper with a mixture of polyacrylamide aqueous solution and impregnated with the melamine resin. The dosage was done so that the impregnated film is the same per square meter Amounts of polyacrylamide and melamine resin contained, such as those in Example 4 described.
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Phenolic Resins Or Amino Resins (AREA)
Description
190°C, 20 kp/cm2, 35 sec. Preßzeit
230°C, 20 kp/cm2, 11 sec. Preßzeit
170°C, 20 kp/cm2, 6 min. Preßzeit bei Rückkühlung.
- Bestimmung des Härtungsgrades
Eine mit Rhodamin B (0,05 g/l) angefärbte 0,1 n HCL wird in
eine Glaskalotte, deren Auflagerand plangeschliffen ist, eingefüllt.Die mit Lösung gefüllte Kalotte läßt man 15 h auf die Grenzfläche
des zu prüfenden Körpers einwirken.Nach Entfernen der Glaskalotte wird die Oberfläche des Prüfkörpers
mit Wasser abgespült und der restliche Wasseranteil
mit einem Tuch abgetrocknet. Beurteilt wird visuell nach
Säureangriff und Farbstoffaufzug.Die Beurteilungsskala für Säureangriff und Farbaufzug ist gesondert
herzustellen und richtet sich nach dem zu prüfenden
Oberflächentyp.Klassifiziert wird nach Bewertungsstufen von 0-6.
- 0 =
- kein Säureangriff; kein Farbstoffaufzug
- 1 =
- Veränderung im Glanz
- 2 =
- geringe Anfärbung
- 3 =
- starke Anfärbung, aber keine Strukturänderung
- 4 =
- Aufquellung der Oberfläche
- 5 =
- Blasenbildung
- 6 =
- Ablösen des Harzes
- Bestimmung des Glanzgrades Die Bestimmung des Glanzgrades erfolgt mit einem Lange REFO 3/REFO 3-M Glanzmeßgerät bei einem Einfallswinkel von 20°. Der Glanzgrad der Oberfläche wird ausgedrückt in % des reflektierten Lichteinfalls.
- Rißbeständigkeit Die Rißprüfung erfolgt an Oberflächen, die durch Pressen von zwei Dekorpapierlagen auf eine Spanplatte bei 170°C und einem Druck von 20 kp/cm2 entwickelt werden. Die Preßzeit beträgt 6min bei anschließender Rückkühlung auf Raumtemperatur. Die Beschichtete Spanplatte wird zur Erzeugung von Spannungen 15 Stunden bei 80°C im Umlufttrockenschrank gelagert und nach dem Abkühlen auf Rißbildung beurteilt.
Beispiel | 1 | 2 | 3 (V) ohne PAA | |
Härtungsgrad | a) 190°C / 35 s | 2 | 2 | 2 |
b) 230°C / 11 s | 1 | 1 | 1 | |
Glanz < 20° | a) 190°C / 35 s | 72 | 70 | 54 |
b) 230°C / 11 s | 78 | 74 | 58 | |
Rißbeständigkeit bei 170°C / 6 min | 1 | 0 | 6 |
- 1 =
- ohne jegliche Beeinträchtigung des brillanten tiefschwarzen Farbtons
- 2 =
- Brillanz leicht gedämpft
- 3 =
- leichte Vergrauung
- 4 =
- starke Vergrauung
- 5 =
- Bildung weißer Inseln
Beispiel 4 5 (V) Vergrauung 2 4
Claims (9)
- Verfahren zur Herstellung von imprägnierten Folien, gekennzeichnet durchI Imprägnieren eines Ausgangsträgerstoffs (I) mit einer wässerigen Lösung eines Polymeren (P) aufgebaut ausa1) 50 bis 100 Gew.-% Acrylamid, Methacrylamid und/ oder einem Derivat des Acrylamids bzw. Methacrylamids, bei dem eines oder beide Wasserstoffatome am Stickstoffatom durch eine Hydroximethylgruppe substituiert sind (Monomere a1)b1) 0 bis 50 Gew.-% eines weiteren mit Acrylamid copolymerisierbaren Monomeren (Monomere b1)
und gegebenenfalls anschließender Trocknung des imprägnierten Ausgangsträgerstoffs (I) bis zu einem Wassergehalt von weniger als 4 Gew.-%, bezogen auf den Feststoffgehalt des imprägnierten Ausgangsträgerstoffs (I), falls dessen Wassergehalt höher ist,II Imprägnieren des in Schritt I erhaltenen imprägnierten und gegebenenfalls getrockneten Trägerstoffs (I) (Ausgangsträgerstoff II) mit einer wässerigen Lösung, enthaltend ein Kondensationsprodukt ausa2) Melaminb2) 1,4 bis 2,5 mol Formaldehyd pro Mol Melamin undc2) 0 bis 0,2 mol einer weiteren Verbindung, die mit Formaldehyd in einer Additions- oder Kondensationsreaktion reagieren kann, pro Mol Melamin. - Verfahren zur Herstellung von imprägnierten Folien nach Anspruch 1, dadurch gekennzeichnet, daß man als Monomere (bl)b1.1) 75 bis 100 Gew.-% eines mit Acrylamid copolymerisierbaren Monomeren, welches eine Hydroxylgruppe, eine Carboxylgruppe, eine Sulfonsäuregruppe gegebenenfalls mit C1- bis C4-Alkylgruppen mono- oder disubstituierte Carbamoylgruppen, eine Carbonyldioxygruppe oder eine (C1- bis C4-Alkoxy)-carbonylgruppe trägt undb1.2) 0 bis 25 Gew.-% bevorzugt mit Acrylamid copolymerisierbare Monomere einsetzt.
- Verfahren zur Herstellung von imprägnierten Folien nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß man ein Polymer (P) mit einem K-Wert von 6 bis 300 einsetzt.
- Verfahren zur Herstellung von imprägnierten Folien nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß man in Schritt I eine wässerige Lösung, enthaltend 5 bis 25 Gew.-% des Polymeren (P), einsetzt.
- Verfahren zur Herstellung von imprägnierten Folien nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß man den Ausgangsträgerstoff (I) pro 100 Gramm Ausgangsträgerstoff (I) mit 4 bis 8,5 g des Polymeren (P), in Form seiner wässerigen Lösung, imprägniert.
- Verfahren zur Herstellung von imprägnierten Folien nach den Ansprüchen 1 bis 5, dadurch gekennzeichnet, daß man in Schritt II eine wässerige Lösung, enthaltend 45 bis 55 Gew.-% des Kondensationsproduktes, einsetzt.
- Verfahren zur Herstellung von imprägnierten Folien nach den Ansprüchen 1 bis 6, dadurch gekennzeichnet, daß man den Ausgangsträgerstoff (II) pro 100 g Ausgangsträgerstoff (II) mit 100 bis 130 g des Kondensationsproduktes, in Form seiner wässerigen Lösung, imprägniert.
- Imprägnierte Folien, erhältlich nach einem Verfahren der Ansprüche 1 bis 7.
- Verwendung der imprägnierten Folien nach Anspruch 8 zur Beschichtung von Schichtpreßstoffen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19525300A DE19525300A1 (de) | 1995-07-12 | 1995-07-12 | Imprägnierte Folien für die Beschichtung von Holzwerkstoffen |
DE19525300 | 1995-07-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0753624A1 EP0753624A1 (de) | 1997-01-15 |
EP0753624B1 true EP0753624B1 (de) | 1998-06-10 |
Family
ID=7766579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96110652A Expired - Lifetime EP0753624B1 (de) | 1995-07-12 | 1996-07-02 | Imprägnierte Folien für die Beschichtung von Holzwerkstoffen |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0753624B1 (de) |
AT (1) | ATE167248T1 (de) |
DE (2) | DE19525300A1 (de) |
ES (1) | ES2117464T3 (de) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2049378A1 (de) * | 1970-10-08 | 1972-04-13 | Basf Ag | Melamin-Tränkharze zum Imprägnieren von Trägerstoffen |
DE2460994B2 (de) * | 1974-12-21 | 1980-10-16 | Cassella Ag, 6000 Frankfurt | Wäßrige Tränkharzlösung und Verfahren zu ihrer Herstellung |
DE2752159A1 (de) * | 1977-11-23 | 1979-06-07 | Basf Ag | Mittel zum traenken von cellulosehaltigen faserstoffen |
DE2851760A1 (de) * | 1978-11-30 | 1980-06-12 | Cassella Ag | Melaminharz, verfahren zu seiner herstellung und seine verwendung zur herstellung von beschichteten holzwerkstoffen und schichtpresstoffen |
DE3700344A1 (de) * | 1986-10-24 | 1988-04-28 | Cassella Ag | Verfahren zur herstellung von melaminharzfolien |
-
1995
- 1995-07-12 DE DE19525300A patent/DE19525300A1/de not_active Withdrawn
-
1996
- 1996-07-02 EP EP96110652A patent/EP0753624B1/de not_active Expired - Lifetime
- 1996-07-02 ES ES96110652T patent/ES2117464T3/es not_active Expired - Lifetime
- 1996-07-02 DE DE59600264T patent/DE59600264D1/de not_active Expired - Fee Related
- 1996-07-02 AT AT96110652T patent/ATE167248T1/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2117464T3 (es) | 1998-08-01 |
ATE167248T1 (de) | 1998-06-15 |
DE59600264D1 (de) | 1998-07-16 |
DE19525300A1 (de) | 1997-01-16 |
EP0753624A1 (de) | 1997-01-15 |
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