DE102013114420A1 - Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer - Google Patents
Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer Download PDFInfo
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- DE102013114420A1 DE102013114420A1 DE102013114420.9A DE102013114420A DE102013114420A1 DE 102013114420 A1 DE102013114420 A1 DE 102013114420A1 DE 102013114420 A DE102013114420 A DE 102013114420A DE 102013114420 A1 DE102013114420 A1 DE 102013114420A1
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- Prior art keywords
- styrene
- impregnated
- acrylate copolymer
- aqueous dispersion
- impregnated paper
- 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.)
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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
-
- 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
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/31—Gums
-
- 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
- D21H17/36—Polyalkenyalcohols; Polyalkenylethers; Polyalkenylesters
-
- 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
-
- 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
- D21H27/28—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 treated to obtain specific resistance properties, e.g. against wear or weather
Abstract
Description
Die Erfindung betrifft eine Imprägnierflotte zur Imprägnierung eines Rohpapieres innerhalb oder außerhalb der Papiermaschine, das nach entsprechender dekorativer Bedruckung zum Beschichten von Paneelen und Möbeln Verwendung finden soll und somit als Substitut für echte Holzfurniere dient. Das so erhaltene imprägnierte Papier wird auch als Vorimprägnat bezeichnet.The invention relates to an impregnating liquor for impregnating a base paper inside or outside the paper machine, which should be used for appropriate decorative printing for coating panels and furniture use and thus serves as a substitute for real wood veneers. The impregnated paper thus obtained is also referred to as prepreg.
Bekannt sind mehrere Verfahren und Imprägnierflotten, die diese Anwendung erfüllen, jedoch nicht allen Ansprüchen ausreichend gerecht werden. Das Verfahren nach
In der Schrift
In der
In
Weiterhin sind in den Patentschriften
Schließlich sind seit längerem Flottenformulierungen bekannt, die neben einer Polymerdispersion weiterhin Harnstoff-Formaldehydharz oder ein Melaminformaldehydharz enthalten. Die damit imprägnierten Papiere tragen den Makel der Formaldehydausgasung in sich und sind ebenfalls nicht recyclebar. Ihr Vorteil besteht hingegen in einer ausgeprägten Oberflächenfestigkeit.Finally, liquor formulations have been known for some time which, in addition to a polymer dispersion, also contain urea-formaldehyde resin or a melamine-formaldehyde resin. The papers impregnated therewith carry the blemish of formaldehyde outgassing and are likewise not recyclable. Their advantage, however, is a pronounced surface strength.
Die Erfindung hat sich die Aufgabe gestellt, den sich im Stand der Technik durchziehenden Mangel der Nichtwiederauflösbarkeit des imprägnierten Materials zu lösen, dabei weiterhin die Abriebfestigkeit und die Härte der Oberfläche gegenüber dem Stand der Technik zu erhöhen. Alle anderen Anforderungen an ein Vorimprägnat sollen dabei erhalten bleiben.It is an object of the invention to overcome the deficiency of non-repulpability of the impregnated material which has been achieved in the prior art while continuing to increase the abrasion resistance and the hardness of the surface compared with the prior art. All other requirements for a pre-impregnate should be preserved.
Erfindungsgemäß wird die Aufgabe mit einer Flottenkomponente gelöst, die dadurch gekennzeichnet ist, dass sie kaltwasserlöslich ist. Das Rohpapier wird demnach mit einer Imprägnierflotte imprägniert, die sich zusammensetzt aus zwei unterschiedlichen wässrigen Dispersionen, nämlich einer Styrol-Acrylat-Copolymerdispersion und einer Styrol-Ethyl/Butylacrylat-Copolymerdispersion sowie als dritte Komponente die wässrige Lösung eines hydrophob modifizierten Polymers, das kaltwasserlöslich ist. Bei diesem hydrophob modifizierten Polymer handelt es sich um Polyvinylbutyral als 17 prozentiger Anteil in 83% Polyvinylalkohol, der bis zur Grenze der Wasserlöslichkeit mit Maleinsäure reacetalisiert wurde. According to the invention the object is achieved with a liquor component, which is characterized in that it is cold water soluble. The base paper is thus impregnated with an impregnating liquor which is composed of two different aqueous dispersions, namely a styrene-acrylate copolymer dispersion and a styrene-ethyl / butyl acrylate copolymer dispersion and, as a third component, the aqueous solution of a hydrophobically modified polymer which is cold water-soluble. This hydrophobically modified polymer is polyvinyl butyral as a 17 percent in 83 percent polyvinyl alcohol that has been reacetalized with maleic acid to the limit of water solubility.
Diese Komponente verleiht dem mit der erfindungsgemäßen Imprägnierflotte imprägnierten Papier eine gute Flexibilität und Oberflächenfestigkeit, die durch einen geringen Anteil an Xanthan-Gummi noch unterstützt wird. Der Xanthan-Gummi hat in der Gesamtformulierung der Imprägnierflotte die Aufgabe, deren Wasserrückhaltevermögen so zu steigern, dass ihre Verarbeitbarkeit auf einer Leimpresse oder auf einer Filmpresse ohne Strichspaltung ermöglicht bzw. gewährleistet wird.This component gives the paper impregnated with the impregnating liquor according to the invention good flexibility and surface strength, which is still aided by a small proportion of xanthan gum. The xanthan gum in the overall formulation of the impregnating liquor has the task of increasing its water retention capacity so that its processability on a size press or on a film press without line splitting is made possible or guaranteed.
Die Imprägnierflotte wird bevorzugt so zubereitet, indem zunächst der schwer wasserlösliche Xanthan-Gummi dem Wasseranteil zugefügt und gelöst wird. Danach werden die weiteren Komponenten hinzugesetzt. Im Bedarfsfalle kann eine kleine Menge Entschäumer schließlich noch beigefügt werden.The impregnating liquor is preferably prepared by first adding the sparingly water-soluble xanthan gum to the water portion and dissolving it. Thereafter, the other components are added. If necessary, a small amount of defoamer can finally be added.
Die Mengenanteile der einzelnen Komponenten sind dabei variabel. Dabei gelten erfindungsgemäß die folgenden Grenzen:The proportions of the individual components are variable. The following limits apply according to the invention:
Komponente 1: WasserComponent 1: Water
- Anteil von 0 bis 60 Vol.-%. Vorzugsweise von 20 bis 40 Vol.-%.Proportion of 0 to 60% by volume. Preferably from 20 to 40% by volume.
Komponente 2: Styrol-Ethyl/Butylacrylat-CopolymerisatComponent 2: styrene-ethyl / butyl acrylate copolymer
- Anteil von 40 bis 70 Vol.-%;Proportion of 40 to 70% by volume;
- Vorzugsweise von 50 bis 60 Vol.-%Preferably from 50 to 60% by volume
Komponente 3: Styrol-Acrylat-Copolymerisat Component 3: styrene-acrylate copolymer
- Anteil von 0 bis 15 Vol.-%Proportion of 0 to 15 vol.%
- Vorzugsweise von 2 bis 6 Vol.-%Preferably from 2 to 6% by volume
Komponente 4: PolyvinylbutyralComponent 4: polyvinyl butyral
- Anteil von 3 bis 15 Vol.-%Proportion of 3 to 15 vol.%
- Vorzugsweise von 5 bis 12 Vol.-%Preferably from 5 to 12% by volume
Komponente 5: Xanthan-GummiComponent 5: Xanthan gum
- (befindet sich mit 0,2 bis 0,5 Masse % in Komponente 1)(located at 0.2 to 0.5% by weight in component 1)
Die nachstehende Tabelle 1 soll die erfindungsgemäße Rezeptur für den Fachmann nachvollziehbar beschreiben.
Die einzelnen Volumenprozentangaben addieren sich in jedem Falle auf 100 Volumenprozent.The individual volume percentages add up in each case to 100 percent by volume.
Der im getrockneten Zustand des mit der Imprägnierflotte in Tabelle 1 imprägnierten Papieres notwendige, ebenfalls getrocknete, Substanzeintrag beträgt 10 bis 30 Gewichtsprozent, vorzugsweise 15 bis 25 Gewichtsprozent, bezogen auf das Gesamtgewicht.The dried substance in the dried state of impregnated with the impregnating liquor in Table 1 impregnated paper, substance entry is 10 to 30 weight percent, preferably 15 to 25 weight percent, based on the total weight.
Dabei ist hier unter der Bezeichnung „getrockneter Zustand“ das Gewicht eines Bogens nach mindestens zweistündiger Lagerung im Normklima von 50% relativer Luftfeuchte bei 23 Grad C zu verstehen.Here, the term "dried state" is to be understood as meaning the weight of a sheet after storage for at least two hours in the standard atmosphere of 50% relative humidity at 23 ° C.
Wird nun ein holzfreies Rohpapier in einer Zusammensetzung wie im nachfolgenden Beispiel imprägniert, so verfügt es anschließend über folgende Eigenschaften, die seine Eignung in der Anwendung als Vorimprägnat dokumentieren.If a wood-free base paper is impregnated in a composition as in the following example, it then has the following properties, which document its suitability in the application as a preimpregnate.
Das imprägnierte Papier ist abriebfest, temperaturbeständig, lichtecht, flexibel, verfügt über eine gute Wasserbeständigkeit, gute Oberflächenfestigkeit, gute Spaltfestigkeit, ist formaldehydfrei und ist mit herkömmlichen Methoden wie ein nassfestes Papier recyclebar.The impregnated paper is abrasion-resistant, temperature-resistant, light-fast, flexible, has good water resistance, good surface strength, good splitting resistance, is formaldehyde-free and can be recycled with conventional methods such as wet-strength paper.
Die Wiederauflösbarkeit wurde im Labor mit „gut“ bewertet. Sie wurde folgendermaßen geprüft:The re-solubility was rated "good" in the laboratory. It has been tested as follows:
Lösebeispiel 1:Solution Example 1:
In einem Laboraufschläger wurden 4000 ml Wasser und 10 ml einer 50 prozentigen NaOH-Lösung eingetragen. Danach wurden 210 g erfindungsgemäßes Rohpapier in Stücke gerissen von etwa 50 × 50 mm und ebenfalls eingetragen. Danach wurde mit einer Drehzahl von 600 min–1 über 1 Stunde das eingetragene Papier redispergiert. Im Ergebnis entstand ein völlig stippenfreier recyclebarer Stoff, wie daraus gebildete Blätter in der Durchsicht zeigten.In a laboratory coiler 4000 ml of water and 10 ml of a 50 percent NaOH solution were added. Thereafter, 210 g of raw paper according to the invention were torn into pieces of about 50 × 50 mm and also registered. Thereafter, the registered paper was redispersed at a speed of 600 min -1 for 1 hour. The result was a completely speck-free recyclable fabric, as it showed leaves formed in the review.
Marktübliche Vorimprägnate erreichen auf die oben beschriebene Weise nach 6 Stunden noch keine Stippenfreiheit.Commercially available prepregs in the manner described above still have no speckle freedom after 6 hours.
Im Folgenden ein praktisches Beispiel der Herstellung eines erfindungsgemäßen Vorimprägnates.Below is a practical example of the preparation of a prepreg according to the invention.
Auf einer Langsiebpapiermaschine mit integrierter Leimpresse wurde ein Rohpapier von 50 g/m2 hergestellt, das aus 80% elementar chlorfrei gebleichten Eukalyptussulfatzellstoff und 20% ebensolchem Kiefersulfatzellstoff bestand. Diese beiden Zellstoffkomponenten wurden in einer vorgelagerten Mahlstraße auf 32 Grad SR (Schopper-Riegler) ausgemahlen. In der folgenden kontinuierlich arbeitenden Mischzentrale wurden dem Faserstoffgemisch weitere 10 Vol.-% Nassausschuss, 3 Masseprozent Epichlorhydrinharz (trocken gerechnet und auf das trockene Papier bezogen) und eine dem Zielfarbort zugeordnete Menge an Eisenoxidfarbpigmenten in Slurryform zugesetzt. Der Dickstoff verfügte zu diesem Zeitpunkt über eine Stoffdichte von 2,7%.On a fourdrinier machine with integrated size press, a raw paper of 50 g / m 2 was produced, which consisted of 80% elemental chlorine-free bleached eucalyptus sulphate pulp and 20% of the same pine sulphate pulp. These two pulp components were ground in an upstream mill to 32 degrees SR (Schopper-Riegler). In the following continuously operating mixing center, an additional 10% by volume of wet broke, 3% by weight of epichlorohydrin resin (calculated dry and based on the dry paper) and an amount of iron oxide color pigments in slurry form assigned to the target color location were added to the pulp mixture. The thick material at this time had a consistency of 2.7%.
Im weiteren technologischen Verlauf wurde die Dickstoffmischung in einer Mischpumpe mit Rückwasser auf eine Stoffdichte von 0,65% herunterverdünnt, wobei in die Saugleitung dieser Mischpumpe noch eine Titandioxid-Slurry zudosiert wurde in einer gesteuerten Menge, die im fertigen Endprodukt zu 19% Füllstoffgehalt führte.In the further technological course, the thick matter mixture was diluted down in a mixing pump with water back to a consistency of 0.65%, wherein in the suction of this mixing pump nor a titanium dioxide slurry was added in a controlled amount, which led to 19% filler content in the finished product.
In die Druckleitung dieser Mischpumpe wurden schließlich noch 0,5 Gewichtsprozent Polyaluminiumchlorid (bezogen auf fertiges Papier) und ebenso 0,15 Gewicht-% eines anionischen Polyacrylamides als Retentionsmittel zugefügt.Finally, 0.5% by weight of polyaluminum chloride (based on finished paper) and also 0.15% by weight of an anionic polyacrylamide as retention agent were added to the pressure line of this mixing pump.
In dieser Verdünnung und Zusammensetzung wurde der Stoff über Reinigungsanlagen der Papiermaschine zugeführt und eine Rohpapierbahn von 50 g/m2 auf einen Trockengehalt von 96% vorgetrocknet, in der integrierten Leimpresse mit der erfindungsgemäßen Rezeptur gemäß Tabelle 1 imprägniert. Das Flächengewicht des Fertigproduktes betrug 60,2 g/m. Es hatte einen Feuchtegehalt von 3%.In this dilution and composition, the material was supplied to the paper machine via cleaning systems and a base paper web of 50 g / m 2 pre-dried to a solids content of 96%, impregnated in the integrated size press with the inventive formulation according to Table 1. The basis weight of the finished product was 60.2 g / m. It had a moisture content of 3%.
In Tabelle 2 sind weitere Prüfergebnisse aufgeführt. Weitere für ein Vorimprägnat typische Merkmale, wie Lackstand, Lichtechtheit, Knitterfestigkeit usw. wurden ebenfalls geprüft und mit keinerlei negativem Befund registriert.Table 2 shows more test results. Other features typical of a prepreg, such as paint level, lightfastness, crease resistance, etc., were also tested and recorded with no negative result.
Des Weiteren wurden Verpressungen auf Spanplatten vorgenommen und im Vergleich zu marktüblichen Vorimprägnaten auf Lackierbarkeit, Lackstand und chemische Beständigkeit gegen Kaffee und Senf getestet. In addition, pressings were made on chipboard and tested for paintability, paint level and chemical resistance to coffee and mustard compared to commercially available prepregs.
Im Ergebnis wurden in keinen der genannten Merkmale schlechtere Ergebnisse erzielt als die marktüblichen Produkte leisten konnten.As a result, in none of the above-mentioned characteristics were worse results achieved than could be achieved by commercially available products.
Tabelle 2: Weitere ErgebnisseTable 2: Further results
- a) Imprägnierflotte pH-Wert: 5,1 Konzentration: 31,7% Viskosität Fordbecher Düse 4: 14 sec.a) impregnation liquor pH: 5.1 Concentration: 31.7% Viscosity Ford cup nozzle 4: 14 sec.
- b) Fertiges Papierb) Finished paper
ZITATE ENTHALTEN IN DER BESCHREIBUNG QUOTES INCLUDE IN THE DESCRIPTION
Diese Liste der vom Anmelder aufgeführten Dokumente wurde automatisiert erzeugt und ist ausschließlich zur besseren Information des Lesers aufgenommen. Die Liste ist nicht Bestandteil der deutschen Patent- bzw. Gebrauchsmusteranmeldung. Das DPMA übernimmt keinerlei Haftung für etwaige Fehler oder Auslassungen.This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.
Zitierte PatentliteraturCited patent literature
- EP 0889168 A2 [0002, 0002] EP 0889168 A2 [0002, 0002]
- DE 19758479 A1 [0002] DE 19758479 A1 [0002]
- EP 0223922 [0003] EP 0223922 [0003]
- WO 94/00523 [0004, 0005] WO 94/00523 [0004, 0005]
- EP 0739435 B1 [0005] EP 0739435 B1 [0005]
- DE 102008041296 A1 [0006] DE 102008041296 A1 [0006]
- DE 60025007 T2 [0007] DE 60025007 T2 [0007]
- EP 1214383 B1 [0007] EP 1214383 B1 [0007]
- DE 10134302 C1 [0008] DE 10134302 C1 [0008]
- DE 102007030102 A1 [0009] DE 102007030102 A1 [0009]
- DE 1972826 A1 [0010] DE 1972826 A1 [0010]
- DE 2903172 A1 [0010] DE 2903172 Al [0010]
- DE 10307966 A1 [0011] DE 10307966 A1 [0011]
- DE 10307966 C2 [0011] DE 10307966 C2 [0011]
- EP 1757731 A2 [0011] EP 1757731 A2 [0011]
- EP 1518024 B1 [0011] EP 1518024 B1 [0011]
Zitierte Nicht-PatentliteraturCited non-patent literature
- DIN EN ISO 536 [0035] DIN EN ISO 536 [0035]
- DIN EN 20535 [0035] DIN EN 20535 [0035]
- DIN 54370 [0035] DIN 54370 [0035]
- ISO 2471 [0035] ISO 2471 [0035]
- DIN 53107 [0035] DIN 53107 [0035]
- ISO 5627 [0035] ISO 5627 [0035]
- DIN 53120/1 [0035] DIN 53120/1 [0035]
- DIN 53121 [0035] DIN 53121 [0035]
- DIN 53121 [0035] DIN 53121 [0035]
- EN 12956/99 [0035] EN 12956/99 [0035]
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE102013114420.9A DE102013114420A1 (en) | 2012-12-23 | 2013-12-19 | Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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DE102012113079.5 | 2012-12-23 | ||
DE102012113079 | 2012-12-23 | ||
DE102013114420.9A DE102013114420A1 (en) | 2012-12-23 | 2013-12-19 | Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer |
Publications (1)
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DE102013114420A1 true DE102013114420A1 (en) | 2014-06-26 |
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DE102013114420.9A Withdrawn DE102013114420A1 (en) | 2012-12-23 | 2013-12-19 | Impregnated paper comprises base paper which is impregnated on one side with water-based impregnating solution comprising e.g. aqueous dispersion of styrene-ethyl-butyl acrylate copolymer and aqueous dispersion of styrene-acrylate copolymer |
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DE10307966C5 (en) | 2003-02-24 | 2009-05-28 | AHLSTROM OSNABRÜCK GmbH | Preimpregnate and process for its preparation |
DE102007030102A1 (en) | 2007-06-28 | 2009-01-02 | Technocell Dekor Gmbh & Co. Kg | prepreg |
DE102008041296A1 (en) | 2007-08-22 | 2009-03-19 | Basf Se | Aqueous impregnating agent, useful for impregnating raw or glued papers, comprises an urea derivative and an emulsion polymer, where the emulsion polymer contains ethylenically unsaturated monomer containing e.g. epoxide group |
Non-Patent Citations (9)
Title |
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DIN 53107 |
DIN 53120/1 |
DIN 53121 |
DIN 54370 |
DIN EN 20535 |
DIN EN ISO 536 |
EN 12956/99 |
ISO 2471 |
ISO 5627 |
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