EP1819877B1 - Procede pour produire du papier, du carton, du carton blanchi presentant une resistance elevee a sec - Google Patents

Procede pour produire du papier, du carton, du carton blanchi presentant une resistance elevee a sec Download PDF

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EP1819877B1
EP1819877B1 EP05811227A EP05811227A EP1819877B1 EP 1819877 B1 EP1819877 B1 EP 1819877B1 EP 05811227 A EP05811227 A EP 05811227A EP 05811227 A EP05811227 A EP 05811227A EP 1819877 B1 EP1819877 B1 EP 1819877B1
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mol
units
monoethylenically unsaturated
process according
polymer
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EP1819877A1 (fr
Inventor
Anton Esser
Hans-Joachim HÄHNLE
Martin Rübenacker
Norbert Schall
Jacques Dupuis
Josef Neutzner
Manfred Niessner
Berthold Sturm
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BASF SE
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BASF SE
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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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/18—Reinforcing agents
    • 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
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/46—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/55—Polyamides; Polyaminoamides; Polyester-amides
    • 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
    • D21H17/54—Synthetic macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen
    • D21H17/56—Polyamines; Polyimines; Polyester-imides

Definitions

  • the invention relates to a process for the production of paper, paperboard and cardboard with high dry strength by separately adding a polymer containing vinylamine units and a polymeric anionic compound to a pulp, dewatering the pulp and drying the paper products.
  • a method for the production of paper with high dry strength is known in which the paper stock is first a water-soluble cationic polymer, z.
  • a water-soluble cationic polymer such as a hydrolyzed polyacrylamide
  • the anionic polymers contain up to 30 mol% of copolymerized acrylic acid.
  • From the DE-A 35 06 832 discloses a process for the production of paper with high dry strength, in which one adds to the stock first a water-soluble cationic polymer and then a water-soluble anionic polymer.
  • Suitable anionic polymers are, for example, homopolymers or copolymers of ethylenically unsaturated C 3 -C 5 -carboxylic acids.
  • the copolymers contain at least 35 wt .-% of an ethylenically unsaturated C 3 - C 5 carboxylic acid (eg acrylic acid) in copolymerized form.
  • polyethyleneimine polyvinylamine, polydiallyldimethylammonium chloride and epichlorohydrin crosslinked condensation products of adipic acid and diethylenetriamine are described.
  • the use of partially hydrolyzed homo- and Copolymers of N-vinylformamide have been considered.
  • the degree of hydrolysis of the N-vinylformamide polymers is at least 30 mol% and is preferably 50 to 100 mol%.
  • the JP-A 1999-140787 relates to a process for the production of corrugated board, wherein to improve the strength properties of a paper product to the pulp 0.05 to 0.5 wt .-%, based on dry pulp, of a polyvinylamine obtained by hydrolysis of polyvinylformamide having a degree of hydrolysis of 25 to 100 %, in combination with an anionic polyacrylamide, the pulp is then dewatered and dried.
  • a paper product having improved strength properties obtainable by applying to the surface of a paper product a polyvinylamine and a polymeric anionic compound which can form a polyelectrolyte complex with polyvinylamine, or a polymeric compound having aldehyde functions such as aldehyde group-containing polysaccharides.
  • a polyvinylamine and a polymeric anionic compound which can form a polyelectrolyte complex with polyvinylamine or a polymeric compound having aldehyde functions such as aldehyde group-containing polysaccharides.
  • WO 04/061235 a method for the production of paper, especially tissue, with particularly high wet and / or dry strengths is known, in which one first admits to the paper a water-soluble cationic polymer that contains at least 1.5meq / g polymer of primary amino functionalities and a molecular weight of at least 10,000 daltons. Particular emphasis is placed here partially and fully hydrolyzed homopolymers of N-vinylformamide. Subsequently, a water-soluble anionic polymer is added which contains anionic and / or aldehydic groups.
  • the advantage of this method is mainly the variability of the two-component systems described in terms of various paper properties, including wet and dry strength, exposed.
  • EP-A 438 744 is the use of copolymers of, for example, N-vinylformamide and acrylic acid, methacrylic acid and / or maleic acid having a K value of 8 to 50 (determined according to H. Fikentscher in 1% aqueous solution at pH 7 and 25 ° C) and the from them by partial or complete removal of formyl groups from the copolymerized vinylformamide with the formation of vinylamine units polymers available as anti-scale agents in water-bearing systems such as boilers or pipes, known.
  • copolymers obtainable by copolymerizing N-vinylcarboxamides, monoethylenically unsaturated carboxylic acids and optionally other ethylenically unsaturated monomers and subsequent hydrolysis of the vinylcarboxylic acid units contained in the copolymers to the corresponding amine or ammonium units are used as additives in papermaking to paper stock to increase the drainage rate and the retention and the dry and wet strength of the paper can use, see. EP-B 672 212 ,
  • the present invention has for its object to provide a further process for the production of paper with high dry strength and lowest possible wet strength available.
  • the increase in dry strength, in particular in packaging papers (for example testliner) should be further improved compared with the previously known processes.
  • the wet strength or the ratio of wet to dry strength should be further minimized.
  • Examples of monomers of group (a) are N-vinylformamide, N-vinyl-N-methylformamide, N-vinylacetamide, N-vinyl-N-methylacetamide, N-vinyl-N-ethylacetamide, N-vinyl-N-methylpropionamide and N -Vinylpropionamid.
  • the monomers of group (a) may be used alone or in admixture in the copolymerization with the monomers of the other groups.
  • Suitable monomers of group (b) are, in particular, monoethylenically unsaturated carboxylic acids having 3 to 8 carbon atoms and the water-soluble salts of these carboxylic acids.
  • This group of monomers includes, for example, acrylic acid, methacrylic acid, dimethacrylic acid, ethacrylic acid, maleic acid, fumaric acid, itoconic acid, mesaconic acid, citraconic acid, methylenemalonic acid, allylacetic acid, vinylacetic acid and crotonic acid.
  • monomers of group (b) are monomers containing sulfo groups, such as vinylsulfonic acid, acrylamido-2-methylpropanesulfonic acid and styrenesulfonic acid and vinylphosphonic acid.
  • the monomers of this group can be used alone or in admixture with each other, in partially or completely neutralized form in the copolymerization.
  • neutralization for example, alkali metal or alkaline earth metal bases, ammonia, amines and / or alkanolamines are used.
  • the monomers of group (b) are preferably used in the copolymerization in partially neutralized form.
  • the copolymers may optionally contain monomers of group (c) in copolymerized form, for example esters of ethylenically unsaturated C 3 to C 5 carboxylic acids such as methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, isobutyl methacrylate, methyl methacrylate, ethyl methacrylate and vinyl esters such as vinyl acetate or Vinyl propionate, or other monomers such as N-vinylpyrrolidone, N-vinylimidazole, acrylamide and / or methacrylamide.
  • esters of ethylenically unsaturated C 3 to C 5 carboxylic acids such as methyl acrylate, ethyl acrylate, n-butyl acrylate, isobutyl acrylate, isobutyl methacrylate, methyl methacrylate, ethyl methacrylate and vinyl est
  • copolymers (d) which contain at least two double bonds in the molecule, for example methlenebisacrylamide, glycol diacrylate, glycol dimethacrylate, glyceryl triacrylate, triallylamine, pentaerythritol triallyl ether, esterified at least twice with acrylic acid and / or methacrylic acid
  • polyalkylene glycols or polyols such as pentaerythritol, Sobit or glucose. If at least one monomer of group (d) is used in the copolymerization, the amounts used are up to 2 mol%, for example 0.001 to 1 mol%.
  • the copolymerization of the monomers takes place in a known manner in the presence of free-radical polymerization initiators and optionally in the presence of polymerization regulators, cf. EP-B 672 212 , Page 4, lines 13 - 37 or EP-A 438 744 , Page 2, line 26 to page 8, line 18.
  • the hydrolysis of the anionic copolymers can be carried out in the presence of acids or bases or else enzymatically.
  • the vinylamine groups formed from the vinylcarboxamide units are present in salt form.
  • the hydrolysis of vinylcarboxylic acid amide copolymers is described in U.S. Pat EP-A 438 744 , Page 8, line 20 to page 10, line 3, described in detail. The remarks made there apply correspondingly to the preparation of the amphoteric polymers to be used according to the invention.
  • the average molecular weights M.sub.w of the anionic or amphoteric polymers are, for example, 30,000 D to 10 million D, preferably 100,000 D to 1 million D.
  • These polymers have, for example, K values (determined according to H. Fikentscher in 5% aqueous sodium chloride solution pH 7, a polymer concentration of 0.5% by weight and a temperature of 25 ° C) in the range of 20 to 250, preferably 50 to 150.
  • a polymeric cationic component which is exclusively polymer containing vinylamine units is first added to the paper stock. All polymers suitable for this purpose, for example those cited in the prior art, are suitable for this purpose WO 04/061235 , Page 12, line 28 to page 13, line 21 and in Figure 1 are indicated.
  • the molecular weight M w of the polymers containing vinylamine units is, for example, 1000 to 5 million, and is usually in the range of 5,000 to 500,000, preferably 40,000 D to 400,000 D.
  • R 1 , R 2 H or C 1 - to C 6 -alkyl
  • amidine units can form from vinylamine units and adjacent vinylsamide units.
  • the indication of vinylamine units comprises the sum of vinylamine and amidine units in the polymer.
  • polymer containing vinylamine units for example, a homopolymer of N-vinylformamide hydrolyzed to at least 10 mol% is used.
  • Polyvinylamine and / or at least 50 mol% of hydrolyzed homopolymers of N-vinylformamide are preferably used in the inventive method as a cationic component.
  • This group of polymers contains, for example, up to a maximum of 35 mol%, preferably up to a maximum of 10 mol%, of at least one acid group-containing monomer of group (b).
  • Wood pulp includes, for example, groundwood, thermomechanical pulp (TMP), chemo-thermo-mechanical pulp (CTMP), pressure groundwood, semi-pulp, high yield pulp, and refiner mechanical pulp (RMP).
  • TMP thermomechanical pulp
  • CMP chemo-thermo-mechanical pulp
  • RMP refiner mechanical pulp
  • pulp for example, sulphate, sulphite and soda pulps come into consideration.
  • unbleached pulp also referred to as unbleached kraft pulp
  • Suitable annual plants for the production of pulps are, for example, rice, wheat, sugar cane and kenaf.
  • waste paper is usually used, which is used either alone or in admixture with other pulps or one starts from fiber blends of a primary material and recycled coated broke, e.g. bleached pine sulfate mixed with recycled coated board.
  • the method according to the invention has particular significance for the production of paper and board from waste paper, because it significantly increases the strength properties of the recycled fibers.
  • the pH of the stock suspension is, for example, in the range of 4.5 to 8, most 6 to 7.5.
  • an acid such as sulfuric acid or aluminum sulphate.
  • the polymers comprising vinylamine units, ie the cationic component of the polymers to be metered into the paper stock, are added in the method according to the invention to the thick stock or preferably to a thin stock.
  • the point of addition is preferably in front of the screens, but may also be between a shearing stage and a screen or afterwards.
  • the anionic component is usually only after addition of the cationic component added to the pulp, but can also be dispensed simultaneously but separately from the cationic component to the pulp. Furthermore, it is also possible first to add the anionic and subsequently the cationic component.
  • the vinylamine units-containing polymer and the polymeric anionic compound are used, for example, each in an amount of 0.1 to 2.0 wt .-%, preferably 0.3 to 1 wt .-%, based on dry pulp.
  • the ratio of vinylamine units-containing polymer to polymeric anionic compound is, for example, 5: 1 to 1: 5, and is preferably in the range of 2: 1 to 1: 2.
  • the process according to the invention gives paper products which, compared with the processes of the prior art, have a higher level of dry strength with simultaneously low wet strength.
  • the parts given in the following examples are parts by weight, the percentages are based on the weight of the substances.
  • the K value of the polymers was determined by Fikentscher, Cellulose-Chemie, Vol. 13, 58-64 and 71-74 (1932 ) at a temperature of 20 ° C in 5 wt .-% aqueous saline solutions at a pH of 7 and a polymer concentration of 0.5%.
  • K k * 1000.
  • a 0.5% aqueous pulp suspension was prepared.
  • the pH of the suspension was 7.1, the freeness of the substance 50 ° Schopper-Riegler (° SR).
  • the stock suspension was then divided into 36 equal parts and processed into sheets of a basis weight of 120 g / m 2 in Comparative Examples 1 to 26 and Examples 27 to 36 under the following conditions.

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  • Paper (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)

Claims (14)

  1. Procédé de fabrication de papier, de bristol et de carton présentant une résistance à sec élevée par ajout séparé d'un polymère convenant des unités vinylamine et d'un composé anionique polymère à une pâte à papier, déshydratation de la pâte à papier et séchage des produites de papier, caractérisé en ce qu'au moins un copolymère qui peut être obtenu par copolymérisation de (a) au moines un amide d'acide N-vinylcarboxylique de formule
    Figure imgb0013
     dans laquelle R1, R2 = H ou alkyle en C1 à C6,
    (b) au moins un monomère monoéthyléniquement insaturé contenant des groupes acides et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et éventuellement
    (c) d'autres monomères monoéthyléniquement insaturés, et éventuellement
    (d) des composés comprenant au soins deux doubles liaisons éthyléniquement insaturée par molécule,
    est utilisé en tant que composé anionique polymère.
  2. Procédé selon la revendication 1, caractérisé en ce qu'un copolymère qui peut être obtenu par copolymérisation de
    (a) du N-vinylformamide,
    (b) de l'acide acrylique, de l'acide méthacrylique et/ou leurs sels d'alcali ou d'ammonium, et éventuellement
    (c) d'autres monomères monoéthyléniquement insaturés, est utilisé.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le composé anionique polymère contient sous forme copolymérisée
    (a) 10 à 95 % en moles d'unités de formule I
    (b) 5 à 90 % en moles d'unités d'un acide carboxylique monoéthyléniquement insaturé contenant 3 à 8 atones C par molécule et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et
    (c) 0 à 30 % en moles d'unités d'au mains un autre monomères monoéthyléniquement insaturé.
  4. Procédé selon la revendication 4, caractérisé en ce que le composé anionique polymère contient sous forme copolymérisée
    (a) 10 à 95 % en moles d'unités de formule I
    (b) 5 à 90 % en moles d'unités d'un monomètre monoéthyléniquement insaturé contenant des groupes acides et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et
    (c) 0 à 30 % en moles d'unités d'au moins un autre monomères monoéthyléniquement insaturé, et
    (d) 0 à 2 % en moles, de préférence 0,001 à 1 % en moles, d'au moins un composé comprenant au moins deux doubles liaisons éthyléniquement insaturées.
  5. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que le composé anionique polymère peut être obtenu par copolymérisation de
    (a) au moins un amide d'acide N-vinylcarboxylique de formule
    Figure imgb0014
     dans laquelle R1, R2 = H ou alkyle en C1 à C6,
    (b) au moins un acide carboxylique monoéthyléniquement insaturé contenant 3 à 8 atomes C par molécule, et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et éventuellement
    (c) d'autres monomères monoéthyléniquement insaturés, et éventuellement
    (d) des composés comprenant au moins deux doubles liaisons éthyléniquement insaturée par molécule,
    puis clivage partiel de groupes -CO-R1 à partir des monomères de formule I copolymérisés dans le copolymère avec formation de groupes amino, la teneur en groupes amine dans le copolymère étant intérieure d'au moins 5 % en moles à la teneur en monomètres (b) convenant des groupes acides copolymérisés.
  6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce que le composé anionique polymère contient sous forme copolymérisée
    (a) 10 à 95 % en moles d'unités de formule I
    (b) 5 à 90 % en moles d'unités d'un monomère monoéthyléniquement insaturé contenant des groupes acides et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et
    (c) 0 à 30 % en moles d'unités d'au moins un autre monomère monoéthyléniquement insaturé,
    (d) 0 à 2 % en moles d'unités d'au moins un composé comprenant au moins deux doubles liaisons éthyléniquement insaturés par molécule, et
    (e) 0 à 42 % en moles d'unités vinylamine, la teneur en groupes amino dans le copolymère était inférieure d'au moins 5 % en moles à la tenseur en monomères (b) contenant des groupes acides copolymérisés.
  7. Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que le composé anionique polymère contient sous forme copolymérisée
    (a) 50 à 90 % en moles de N-vinylformamide,
    (b) 10 à 50 % en moles d'acide acrylique, d'acide méthacrylique et/ou leurs sels d'alcali ou d'ammonium, et éventuellement
    (c) 0 à 30 % en moles d'au moins un autre monomère monoéthyléniquement insaturé.
  8. Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce qu'au moins un composé qui peut être obtenu par polymérisation d'au moins un monomère de formule
    Figure imgb0015
     dans laquelle R1, R2 = H ou alkyle en C1 à C6,
    puis clivage partiel ou total des groupes -CO-R1 à partir des unités des monomères I copolymérisées dans le polymère avec formation de groupes amino,
    est utilisé en tant que polymère contenant des unités vinylamine.
  9. Procédé selon l'une quelconque des revendication 1 à 8, caractérisé en ce qu'un homopolymère de N-vinylformamide hydrolysé à hauteur d'au moins 10 % en moles est utilisé en tant que polymère contentant des usités vinylamine.
  10. Procédé selon l'une quelconque des revendication 1 à 9, caractérisé en ce qu'un copolymère qui peut être obtenu par copolymérisation de
    (a) au moins un amide d'acide N-vinylcarboxylique de formule
    Figure imgb0016
     dans laquelle R1, R2 = H ou allyle en C1 à C6,
    (b) au moins un monomère monoéthyléniquement insaturé contenant des groupes acides et/ou ses sels de métal alcalin, de métal alcalino-terreux ou d'ammonium, et éventuellement
    (c) d'autres monomères monoéthyléniquement insaturés, et éventuellement
    (d) des composés comprenant au moins deux doubles liaisons éthyléniquement insaturées par molécule,
    puis clivage partiel ou total des groupes -CO-R1 à partir des unités des monomères I copolymérisées dans le polymère avec formation de groupes amino, la proportion des groupes amino dans le copolymère étant supérieure d'au moins 10 % en moles à la proportion d'unités de monomères monoéthyléniquement insaturées (b) contenant des groupes acides,
    est utilisé en tant que polymère contenant des unités vinylamine.
  11. Procédé selon l'une quelconque des revendications 1 à 10, caractérisé en ce que de la polyvinylamine et/ou des homopolymères de N-vinylformamide hydrolysés à hauteur d'au moins 50 % en moles sont utilisés en tant que polymère contenant des unités vinylamine.
  12. Procédé selon l'une quelconque des revendication 1 à 11, caractérisé en ce que le polymère contenant des unités vinylamine et le composé anionique polymère sont chacun utilisés en une quantité de 0,1 à 2,0 % en poids, par rapport à la pâte à papier sèche.
  13. Procédé selon l'une quelconque des revendications 1 à 12, caractérisé en ce que le rapport entre le polymère contenant des unités vinylamine et le composé anionique polymère est de 5:1 à 1:5.
  14. Procédé selon l'une quelconque des revendications 1 à 13, caractérisé en ce que le rapport entre le polymère contenant des unités vinylamine et le composé anionique polymère est de 2:1 à 1:2.
EP05811227A 2004-11-23 2005-11-21 Procede pour produire du papier, du carton, du carton blanchi presentant une resistance elevee a sec Active EP1819877B1 (fr)

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PL05811227T PL1819877T3 (pl) 2004-11-23 2005-11-21 Sposób wytwarzania papieru, tektury i kartonu o dużej wytrzymałości w stanie suchym

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DE102004056551A DE102004056551A1 (de) 2004-11-23 2004-11-23 Verfahren zur Herstellung von Papier, Pappe und Karton mit hoher Trockenfestigkeit
PCT/EP2005/012429 WO2006056381A1 (fr) 2004-11-23 2005-11-21 Procede pour produire du papier, du carton, du carton blanchi presentant une resistance elevee a sec

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EP1819877A1 EP1819877A1 (fr) 2007-08-22
EP1819877B1 true EP1819877B1 (fr) 2013-01-09

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US (1) US8349134B2 (fr)
EP (1) EP1819877B1 (fr)
JP (1) JP4778521B2 (fr)
CN (1) CN101065538B (fr)
BR (1) BRPI0518485B1 (fr)
CA (1) CA2586076C (fr)
DE (1) DE102004056551A1 (fr)
ES (1) ES2400189T3 (fr)
PL (1) PL1819877T3 (fr)
PT (1) PT1819877E (fr)
WO (1) WO2006056381A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102004052957A1 (de) * 2004-10-29 2006-05-04 Basf Ag Verfahren zur Herstellung von gekrepptem Papier
DE102005029010A1 (de) * 2005-06-21 2006-12-28 Basf Ag Verfahren zur Herstellung von Papier, Pappe und Karton
EP1999314B1 (fr) * 2006-03-16 2017-02-22 Basf Se Procédé de fabrication de papier et de carton présentant une grande résistance à sec
US8088250B2 (en) 2008-11-26 2012-01-03 Nalco Company Method of increasing filler content in papermaking
WO2009138457A1 (fr) * 2008-05-15 2009-11-19 Basf Se Procédé de production de papier, de carton-pâte, et de carton présentant une résistance à sec élevée
US8404083B2 (en) 2008-08-18 2013-03-26 Basf Se Process for increasing the dry strength of paper, board and cardboard
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DE102004056551A1 (de) 2006-05-24
CN101065538A (zh) 2007-10-31
WO2006056381A1 (fr) 2006-06-01
JP4778521B2 (ja) 2011-09-21
PL1819877T3 (pl) 2013-05-31
CN101065538B (zh) 2011-10-12
CA2586076A1 (fr) 2006-06-01
ES2400189T3 (es) 2013-04-08
EP1819877A1 (fr) 2007-08-22
BRPI0518485B1 (pt) 2015-08-04
JP2008520844A (ja) 2008-06-19
BRPI0518485A2 (pt) 2008-11-18
PT1819877E (pt) 2013-03-12
CA2586076C (fr) 2016-03-15
US20090145566A1 (en) 2009-06-11
US8349134B2 (en) 2013-01-08

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