EP0301372B1 - Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec - Google Patents

Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec Download PDF

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EP0301372B1
EP0301372B1 EP88111572A EP88111572A EP0301372B1 EP 0301372 B1 EP0301372 B1 EP 0301372B1 EP 88111572 A EP88111572 A EP 88111572A EP 88111572 A EP88111572 A EP 88111572A EP 0301372 B1 EP0301372 B1 EP 0301372B1
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weight
value
paper
mol
dry strength
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EP0301372A1 (fr
Inventor
Andreas Dr. Stange
Hans-Juergen Dr. Degen
Werner Auhorn
Volkmar Dr. Weberndoerfer
Michael Dr. Kroener
Heinrich Dr. Hartmann
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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
    • 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
    • D21H17/28—Starch
    • 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
    • D21H17/41—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups
    • D21H17/44—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing ionic groups cationic
    • D21H17/45—Nitrogen-containing groups
    • D21H17/455—Nitrogen-containing groups comprising tertiary amine or being at least partially quaternised
    • 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

Definitions

  • the graft polymerization is preferably carried out in the presence of a redox catalyst.
  • a process for cationizing starch is known from US Pat. No. 4,097,427, in which the starch is boiled in an alkaline medium in the presence of water-soluble quaternary ammonium polymers and an oxidizing agent.
  • Quaternary ammonium polymers include quaternized diallyldialkylamine polymers or quaternized polyethyleneimines are also suitable.
  • the oxidizing agent used is, for example, ammonium persulfate, hydrogen peroxide, sodium hypochlorite, ozone or tert-butyl hydroperoxide.
  • the modified cationic starches which can be prepared in this way are added to the paper stock as dry strength agents in the production of paper. However, the wastewater is polluted by a very high COD value.
  • the invention has for its object to achieve an improvement in the dry strength of paper when using starch compared to the known methods.
  • the substantivity of the starch is increased when it is drawn onto the fibers in the paper stock, thereby reducing the COD load in the wastewater.
  • the mixtures to be used as dry strength agents according to the invention have good retention towards paper fibers in the paper stock.
  • the COD value in the white water is significantly reduced with the mixtures to be used according to the invention compared to a native starch or an enzymatically digested one.
  • the interfering substances contained in the water circuits of paper machines affect the effectiveness of the dry strength agents to be used according to the invention only slightly.
  • the pH of the pulp suspensions can be in the range from 4 to 9, preferably 6 to 8.5.
  • An essential component of the mixtures are enzymatically degraded starches.
  • All native starches can be considered for the preparation of the mixtures, for example native potato starch, wheat starch, corn starch, rice starch and tapioca starch.
  • the starches are broken down with the aid of enzymes, for example ⁇ -amylase from Aspergillus oryzae or from Bacillus lichemiformis or amyloglucosidase from Aspergillus niger, according to known methods, by first preparing an aqueous slurry of a native starch or a mixture of several native starches in water.
  • the slurry is prepared by applying 0.1 to 60 parts by weight of starch to 100 parts by weight of water.
  • starch slurries are then mixed, based on 100 parts by weight of the slurry, with 0.0001 to 1 part by weight of an enzyme customary for the degradation of native starch.
  • the aqueous slurries of starch and enzyme are heated to temperatures of about 100 ° C. with thorough mixing.
  • the starch is broken down enzymatically in the temperature range up to about 90 ° C.
  • the degree of degradation of the native starch depends on the heating rate of the reaction mixture, the residence time at a certain higher temperature and on the amount of the enzyme used.
  • the progress of the degradation of the native starch can easily be determined by taking samples from the batch and determining the viscosity of the samples. As soon as the desired degree of degradation of the starch is reached, the enzyme is deactivated.
  • the easiest way to deactivate is to heat the reaction mixture to temperatures above 90 ° C., for example 92 to 98 ° C. At these temperatures the enzymes lose their activity, so that the enzymatic breakdown then comes to a standstill.
  • the aqueous solution of the enzymatically degraded starch thus obtained is then cooled, for example to 70 ° C. and, if appropriate after being diluted with water, mixed with the cationic polymers, the dry strength agent for the production of paper being obtained.
  • the concentration of the enzymatically degraded starch in the aqueous solution, which is then combined with the is mixed cationic polymer is 40 to 0.5 wt .-%.
  • the enzymatic degradation is carried out so far that aqueous solutions of enzymatically degraded starch with a viscosity of 20 to 2,000, preferably 25 to 1,500 mPa.s (measured in 7.5% aqueous solution at 45 ° C.) are obtained.
  • the aqueous solution of the enzymatically degraded starches is then combined with the cationic polymers described above.
  • the simplest way to do this is to mix the aqueous solution of the enzymatically degraded starches immediately after the enzymatic degradation with the cationic polymers in question in the form of an aqueous solution.
  • the enzymatically degraded starch can be mixed with the cationic polymers at temperatures in the range from 15 to 170 ° C., the reaction being carried out in pressure-tight apparatus at temperatures above 100 ° C.
  • the two components are preferably mixed in the temperature range from 40 to 100 ° C. in a period from 1 min to 60 min.
  • the enzymatically degraded starch and the cationic polymers are mixed in all cases in the absence of oxidizing agents, initiators and alkali. Only homogeneous mixing is desirable. 1 to 20, preferably 5 to 15 parts by weight of at least one cationic polymer are used per 100 parts by weight of an enzymatically degraded starch or a mixture of enzymatically degraded starches. For example, a 25% by weight aqueous solution of the mixture of enzymatically degraded starch and cationic polymer to be used as a dry strength agent has a viscosity in the range from 10 to 10,000 mPa.s (measured according to Brookfield at 20 revolutions and 80 ° C.) .
  • Cationic copolymers of group a) include, for example, polymers of diallyldimethylammonium chloride. Polymers of this type are known.
  • Polymers of diallyldimethylammonium chloride should primarily be understood to mean the homopolymers and the copolymers with acrylamide and / or methacrylamide.
  • the copolymerization can be carried out in any monomer ratio.
  • the K value of the homopolymers and copolymers of diallyldimethylammonium chloride is at least 30, preferably 95 to 180.
  • the substituent X ⁇ in the formulas I and II can in principle be any acid residue of an inorganic and an organic acid.
  • the monomers of formula I are obtained by using the free base, i.e. 1-vinyl-2-imidazoline, neutralized with the equivalent amount of an acid.
  • the vinylimidazolines can also be neutralized, for example, with trichloroacetic acid, benzenesulfonic acid or toluenesulfonic acid.
  • quaternized 1-vinyl-2-imidazolines can also be used.
  • quaternizing agents are, for example, C1 to C18 alkyl chlorides or bromides, benzyl chloride, benzyl bromide, epichlorohydrin, dimethyl sulfate and diethyl sulfate. Epichlorohydrin, benzyl chloride, dimethyl sulfate and methyl chloride are preferably used as quaternizing agents.
  • the compounds of the formula I or II are preferably polymerized in an aqueous medium.
  • the copolymers are obtained by polymerizing the monomers of the compound of the formulas I and II with acrylamide and / or methacrylamide.
  • the monomer mixture used in the polymerization contains at least 1% by weight of a monomer of the formula I or II, preferably 10 to 40% by weight.
  • Copolymers containing 60 to 85% by weight of acrylamide and / or methacrylamide and 15 to 40% by weight of N-vinylimidazoline or N-vinyl-2-methylimidazoline in copolymerized form are particularly suitable for the modification of enzymatically degraded starch.
  • the copolymers can also by copolymerizing other monomers, such as styrene, vinyl acetate, vinyl propionate, N-vinylformamide, C1- to C4-alkyl vinyl ether, N-vinylpyridine, N-vinylpyrrolidone, N-vinylimidazole, acrylic acid esters, methacrylic acid esters, ethylenically unsaturated C3- to C5 -Carboxylic acids, sodium vinyl sulfonate, acrylonitrile, methacrylonitrile, vinyl chloride and vinylidene chloride can be modified in amounts up to 25% by weight.
  • other monomers such as styrene, vinyl acetate, vinyl propionate, N-vinylformamide, C1- to C4-alkyl vinyl ether, N-vinylpyridine, N-vinylpyrrolidone, N-vinylimidazole, acrylic acid esters, methacrylic acid esters
  • polymerization in aqueous solution it is possible, for example, to prepare the homopolymers and copolymers in a water-in-oil emulsion.
  • the monomers can also be polymerized by the reverse suspension polymerization method, in which bead-like polymers are obtained.
  • the polymerization is initiated with the aid of conventional polymerization initiators or by the action of high-energy radiation.
  • Suitable polymerization initiators are, for example, hydrogen peroxide, inorganic and organic peroxides, and hydroperoxides and azo compounds. Mixtures of polymerization initiators can be used as well as so-called redox polymerization initiators, e.g.
  • the polymerization is carried out at temperatures in the range from 0 to 100 ° C., preferably 15 to 80 ° C. It is of course also possible to polymerize at temperatures above 100 ° C., but it is then necessary to carry out the polymerization under pressure. For example, temperatures up to 150 ° C are possible.
  • the reaction time depends on the temperature. The higher the temperature during the polymerization, the shorter the time required for the polymerization.
  • the mixtures of the cationic polymers and enzymatically degraded starch to be used according to the invention are added to the paper stock in an amount of 0.5 to 5.0, preferably 1.5 to 3.5% by weight, based on dry paper stock.
  • the pH of the mixture is 2.0 to 9.0, preferably 2.5 to 8.0.
  • the solution of the dry strength agent in water at a solids concentration of 7.5% by weight has a viscosity of 20 to 10,000, preferably 30 to 4,000 mPas, measured in a Brookfield viscometer at 20 rpm and a temperature of 45 ° C.
  • the dry strength agents to be used according to the invention can be used in the production of all known grades of paper, cardboard and cardboard, e.g. Writing, printing and packaging papers.
  • the papers can be made from a variety of different fiber materials, for example from sulfite or sulfate pulp in the bleached or unbleached state, wood pulp, waste paper, thermomechanical material (TMP) and chemothermomechanical material (CTMP).
  • TMP thermomechanical material
  • CMP chemothermomechanical material
  • the pH of the stock suspension is between 4.0 and 10, preferably between 6.0 and 8.5.
  • the dry strength agents can be used both in the production of base paper for papers with low basis weight (LWC papers) and for cardboard.
  • the basis weight of the papers is between 30 and 200, preferably 35 and 150 g / m2, while it can be up to 600 g / m2 for cardboard.
  • the paper products produced according to the invention have a noticeably improved strength compared to those papers which were produced in the presence of an equal amount of native potato starch, which strength can be quantified, for example, on the basis of the tear length, the burst pressure, the CMT value and the tear resistance.
  • the parts given in the examples are parts by weight, the percentages relate to the weight.
  • the viscosities of the solidifiers were determined in an aqueous solution at a solids concentration of 7.5% by weight and a temperature of 45 ° C. in a Brookfield viscometer at 20 rpm; the viscosities of the enzymatically degraded starches were also determined in water at a concentration of 7.5% by weight and at a temperature of 45 ° C. in a Brookfield viscometer at 20 rpm.
  • the sheets were made in a Rapid-Köthen laboratory sheet former.
  • the dry tear length was determined according to DIN 53 112, sheet 1, the dry burst pressure according to Mullen, DIN 53 141, the CMT value according to DIN 53 143 and the tear propagation resistance according to Brecht-Inset according to DIN 53 115.
  • the leaves were tested after 24-hour air conditioning at a temperature of 23 ° C and a relative humidity of 50%.
  • the COD value was determined using the COD tester A from Grove Analysentechnik GmbH.
  • a 25% slurry of native potato starch in water is mixed with such an amount of enzyme ( ⁇ -amylase from Aspergillus oryzae) that the resulting mixture contains 0.01% enzyme, based on the native potato starch used.
  • This mixture is then heated to a temperature in the range from 90 to 95 ° C. with stirring within 15 minutes and then cooled to 70 ° C.
  • the viscosity of the enzymatically degraded native potato starch is 24 mPa.s, measured at 45 ° C in 7.5% aqueous solution.
  • polymer 1 aqueous solution is added to the aqueous solution of the enzymatic potato starch cooled to 70.degree. C. such that the resulting mixture contains 10% polymer 1, based on the enzymatically degraded potato starch used.
  • the mixture is then stirred for a further 10 minutes at 70 ° C. and used according to the invention as a dry strength agent for paper by adding it to a stock suspension before sheet formation.
  • the viscosity of the mixture is 82 mPa.s.
  • a dry strength agent for paper is prepared by using a 25% aqueous solution of enzymatically degraded potato starch (viscosity of a 7.5% aqueous solution at 45 ° C 24 mPa.s) with that described above Polymer 2 mixes. A dry strength agent is obtained which has a viscosity of 108 mPa.s.
  • a dry strength agent for paper is produced from the enzymatically digested starch and polymer 3 specified therein.
  • the hardener has a viscosity of 122 mPa.s.
  • a dry hardening agent is produced from the enzymatically degraded potato starch and the polymer 4.
  • the viscosity of the hardener is 61 mPa.s.
  • a dry hardening agent is produced by mixing the enzymatically degraded potato starch with the polymer 5.
  • a dry strength agent is obtained which has a viscosity of 36 mPa.s.
  • a hardening agent is produced by mixing the enzymatically degraded potato starch with the polymer 6.
  • the solidifying agent has a viscosity of 28 mPa.s.
  • the enzymatically degraded potato starch is mixed with the polymer 7. In this way, a dry strength agent with a viscosity of 31 mPa.s.
  • the enzymatically degraded potato starch is mixed with the polymer 8.
  • native potato starch is broken down with a quarter of the amount of ⁇ -amylase (enzyme) given above, an aqueous strong solution having a viscosity (measured at 45 ° C. in 7.5% aqueous solution) of 190 mPa.s results.
  • the aqueous solution of the degraded starch is then mixed with the polymer 5 at 45 ° C. and used in the form of the aqueous solution of the mixture as a dry strength agent for paper.
  • the viscosity is 210 mPa.s.
  • native potato starch is broken down with only one tenth of the amount of enzyme specified there.
  • the viscosity of the enzymatically degraded potato starch is 443 (measured in 7.5% aqueous solution at 45 ° C).
  • the same amount of polymer 5 is then added to the solution of the enzymatically degraded potato starch, which has cooled to 45 ° C., instead of the polymer 1 used there.
  • a dry strength agent for paper is obtained which has a viscosity of 476 mPa.s.
  • Sheets with a weight of 120 g / m2 are produced in a Rapid Köthen sheet former.
  • the paper stock consists of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR (Schopper-Riegler) and to which the solidifier 1 described above is added in an amount such that the solids content of solidifier 1, based on dry Paper stock, 3.3%.
  • the pH of the stock suspension is adjusted to 7.5.
  • the leaves made from this fabric model are air-conditioned and then the CMT value, the dry burst pressure and the dry tear length are measured using the methods specified above. The results are shown in Table 1.
  • Example 1 is repeated in each case with the exception that the hardeners given in Table 1 are used instead of the hardeners 1 used in Example 1. The results thus obtained are shown in Table 1.
  • Example 1 is repeated without adding a dry strength agent, i.e. a fabric of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR, is dewatered in a Rapid-Köthen sheet former, whereby sheets with a basis weight of 120 g / m2 are obtained.
  • a dry strength agent i.e. a fabric of 80% mixed waste paper and 20% bleached beech sulfite pulp, which is ground to 50 ° SR
  • a Rapid-Köthen sheet former whereby sheets with a basis weight of 120 g / m2 are obtained.
  • Comparative example 1 is repeated with the exception that 3% native potato starch, based on dry fiber material, is added to the paper stock.
  • the strength values of the paper sheets thus obtained are given in Table 1.
  • Comparative example 2 is repeated with the exception that the native potato starch is replaced by the same amount of hardener 11.
  • the strength values of sheets thus obtained are given in Table 1.
  • Paper with a basis weight of 120 g / m 2 and a width of 68 cm is produced on a test paper machine at a speed of the paper machine of 50 m / min.
  • 80% mixed waste paper and 20% bleached sulfite pulp with a freeness of 56 ° SR are used as paper stock.
  • hardener 9 is added in an amount of 3.3%, based on dry paper stock.
  • the white water has a pH of 7.3.
  • the strength values of the paper so produced are given in Table 2.
  • Example 11 is repeated except that the same amount of hardener 10 is used.
  • the strength values of the paper produced in this way are given in Table 2.
  • paper with a basis weight of 120 g / m 2 is produced from a paper stock which consists of 80% mixed waste paper and 20% bleached beech sulfite pulp with a freeness of 56 ° SR.
  • the speed of the paper machine is set to 50 m / min, the pH of the white water is 7.3.
  • the difference to example 11 is that no dry strength agent is used.
  • the strength values of the paper thus obtained are given in Table 2.
  • Comparative example 4 is repeated with the exception that 3% native potato starch, based on dry fiber, is additionally added to the paper stock described there before dewatering.
  • the strength values of the paper thus obtained are given in Table 2.
  • Comparative example 4 is repeated with the exception that 3% strengthening agent 11, based on dry fiber material, is additionally added to the paper stock described there before dewatering.
  • the strength values of the paper thus obtained are given in Table 2.

Claims (7)

  1. Procédé de fabrication de papier, de carton et de carte à solidité à sec élevée, par l'addition d'un agent de renforcement à sec à la pâte à papier et égouttage subséquent de la pâte à papier sous formation d'une feuille, caractérisé en ce que l'on met en oeuvre, à titre d'agent de renforcement à sec, des solutions aqueuses de mélanges d'amidons dégradés par voie enzymatique, d'une viscosité de 20 à 2.000 mPa.s (telle que mesurée en solution aqueuse à 7,5% et à 45°C) et des polymères cationiques, qui, à titre de monomères caractéristiques, contiennent, incorporés par polymérisation,
    a) du chlorure de diallyldiméthylammonium,
    b) de la N-vinylamine ou
    c) des N-vinylimidazolines de la formule
    Figure imgb0016
     dans laquelle
    R¹ = H, alkyle en C₁ à C18
    Figure imgb0017
     R⁵, R⁶ = H, alkyle en C₁ à C₄, Cl, R² = H, alkyle en C₁ à C18
    Figure imgb0018
     R³, R⁴ = H, alkyle en C₁ à C₄, et X représente un reste d'acide,


    et qui possèdent une valeur K d'au moins 30 (comme déterminée selon H. Fikentscher en solution aqueuse à 5% de sel de cuisine, à 25°C et une concentration en polymère de 0,5% en poids).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on met en oeuvre de 1 à 20 parties en poids d'au moins un polymère cationique par 100 parties en poids d'amidon dégradé par voie enzymatique.
  3. Procédé suivant les revendications 1 et 2, caractérisé en ce que l'on met en oeuvre, à titre de polymère cationique, des homopolymères du chlorure de diallyldiméthylammonium, d'une valeur K de 60 à 180.
  4. Procédé selon les revendications 1 et 2, caractérisé en ce que l'on met en oeuvre, à titre de polymère cationique, des homopolymères hydrolysés du N-vinylformamide, où les radicaux formyle des polymères sont scindés ou séparés à raison de 70 à 100% molaires sous formation d'unités N-vinylamine et les polymères hydrolysés possèdent une valeur K de 75 à 170.
  5. Procédé selon les revendications 1 et 2, caractérisé en ce que l'on met en oeuvre, à titre de polymère cationique, des copolymères hydrolysés constitués de
    b1) 95 à 10% molaires de N-vinylformamide et
    b2) 5 à 90% molaires d'acétate de vinyle ou de propionate de vinyle, où les radicaux vinyle du polymère sont scindés ou séparés & raison de 70 à 100% molaires sous formation d'unités N-vinylamine et les radicaux acétyle et propionyle sont scindés ou séparés à raison de 70 à 100% molaires sous formation d'unités alcool vinylique et les copolymères hydrolysés possèdent une valuer K de 70 à 170.
  6. Procédé selon les revendications 1 et 2, caractérisé en ce que l'on met en oeuvre, à titre de polymères cationiques, des homopolymères d'une N-vinylimidazoline, éventuellement substituée, ou un copolymère de cette dernière avec l'acrylamide et/ou le méthacrylamide, d'une valeur K de 80 à 220.
  7. Procédé suivant les revendications 1 et 2, caractérisé en ce que l'on met en oeuvre, à titre de polymères cationiques, des copolymères constitués de
    c1) 70 & 96,5% en poids d'acrylamide et/ou de méthacrylamide,
    c2) 2 à 20% en poids de N-vinylimidazoline ou de N-vinyl-2-méthylimidazoline et
    c3) 1,5 à 10% en poids de N-vinylimidazole,
    possédant une valeur K de 80 à 220.
EP88111572A 1987-07-25 1988-07-19 Procédé de fabrication de papier et de carton ayant une résistance élevée à l'état sec Expired - Lifetime EP0301372B1 (fr)

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Application Number Priority Date Filing Date Title
AT88111572T ATE67538T1 (de) 1987-07-25 1988-07-19 Verfahren zur herstellung von papier, pappe und karton mit hoher trockenfestigkeit.

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DE3724646 1987-07-25
DE19873724646 DE3724646A1 (de) 1987-07-25 1987-07-25 Verfahren zur herstellung von papier, pappe und karton mit hoher trockenfestigkeit

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EP0301372A1 EP0301372A1 (fr) 1989-02-01
EP0301372B1 true EP0301372B1 (fr) 1991-09-18

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US (1) US4940514A (fr)
EP (1) EP0301372B1 (fr)
JP (1) JP2596593B2 (fr)
KR (1) KR890002493A (fr)
AT (1) ATE67538T1 (fr)
AU (1) AU593422B2 (fr)
CA (1) CA1302021C (fr)
DE (2) DE3724646A1 (fr)
DK (2) DK170826B1 (fr)
ES (1) ES2024596B3 (fr)
FI (1) FI92083C (fr)
NO (1) NO172402C (fr)
NZ (1) NZ225536A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0470871A1 (fr) * 1990-08-10 1992-02-12 Alko Group Ltd. Additifs pour papier, et utilisation de ceux-ci
US5354424A (en) * 1989-02-10 1994-10-11 Rha Chokyun Paper composition and methods therefor
EP0685591A1 (fr) * 1992-06-17 1995-12-06 Nicca Chemical Co., Ltd. Agent de fixation de colorant
US5851300A (en) * 1994-10-29 1998-12-22 Basf Aktiengesellschaft Cationic modification of starch and use of the cationically modified starch
US6746542B1 (en) 1999-04-01 2004-06-08 Basf Aktiengesellschaft Modifying starch with cationic polymers and use of the modified starches as dry-strength agent

Families Citing this family (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4311598A1 (de) * 1993-04-08 1994-10-13 Henkel Kgaa Verfahren zur Kontrolle des Absetzens klebender Verunreinigungen aus Papierstoff-Suspensionen
US5382324A (en) * 1993-05-27 1995-01-17 Henkel Corporation Method for enhancing paper strength
US5700893A (en) * 1993-11-12 1997-12-23 Betzdearborn Inc. Water-soluble cationic copolymers and their use as flocculants and drainage aids
US5720888A (en) * 1993-11-12 1998-02-24 Betzdearborn Inc. Water-soluble cationic copolymers and their use as flocculants
US5516852A (en) * 1993-11-12 1996-05-14 W. R. Grace & Co.-Conn. Method of producing water-soluble cationic copolymers
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DE19515943A1 (de) * 1995-05-02 1996-11-07 Basf Ag Pfropfpolymerisate aus Alkylenoxideinheiten enthaltenden Polymerisaten und ethylenisch ungesättigten Verbindungen, Verfahren zu ihrer Herstellung und ihre Verwendung
NL1001218C2 (nl) * 1995-09-15 1997-03-20 Roermond Papier Bv Papier en karton omvattende eiwitmateriaal.
WO1997014729A1 (fr) * 1995-10-20 1997-04-24 Drexel University Derives polyaniline et revetements realises avec ces derives
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DE19713755A1 (de) * 1997-04-04 1998-10-08 Basf Ag Verfahren zur Herstellung von Papier, Pappe und Karton mit hoher Trockenfestigkeit
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US6315866B1 (en) * 2000-02-29 2001-11-13 Nalco Chemical Company Method of increasing the dry strength of paper products using cationic dispersion polymers
US6710175B2 (en) * 2001-08-31 2004-03-23 Kevin Ray Anderson Compositions suitable as additives in the paper industry, preparation; use; and, paper comprising such
DE10164659C2 (de) * 2001-12-21 2003-10-30 Univ Dresden Tech Bindemittelfreier Faserdämmstoff und Verfahren zu dessen Herstellung
DE10233524B4 (de) * 2002-07-23 2006-02-09 Mühle Rüningen GmbH & Co. KG Mittel zur Erhöhung der Aufnahmefähigkeit von Papiermasse für Stärke, Verfahren zur Herstellung, Verwendung sowie Verfahren zur Herstellung von Papier
US7494566B2 (en) * 2002-09-13 2009-02-24 University Of Pittsburgh - Of The Commonwealth System Of Higher Education Composition for increasing cellulosic product strength and method of increasing cellulosic product strength
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US7347263B2 (en) * 2004-02-27 2008-03-25 University of Pittsburgh - of the Commonwealth of Higher Education Networked polymeric gels and use of such polymeric gels in hydrocarbon recovery
WO2010089334A1 (fr) * 2009-02-05 2010-08-12 Basf Se Procédé de fabrication de papier, de carton-pâte et de carton présentant une grande résistance à sec
PT2556191T (pt) 2010-04-07 2016-07-14 Solenis Technologies Cayman Lp Composições aquosas e estáveis de polivinilaminas com amido catiónico e sua utilidade para o fabrico de papel
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EP0470871A1 (fr) * 1990-08-10 1992-02-12 Alko Group Ltd. Additifs pour papier, et utilisation de ceux-ci
EP0685591A1 (fr) * 1992-06-17 1995-12-06 Nicca Chemical Co., Ltd. Agent de fixation de colorant
US5851300A (en) * 1994-10-29 1998-12-22 Basf Aktiengesellschaft Cationic modification of starch and use of the cationically modified starch
EP0788516B2 (fr) † 1994-10-29 2002-10-30 Basf Aktiengesellschaft Procede de modification cationique d'amidon et utilisation d'amidon cationiquement modifie
US6746542B1 (en) 1999-04-01 2004-06-08 Basf Aktiengesellschaft Modifying starch with cationic polymers and use of the modified starches as dry-strength agent

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DK407888D0 (da) 1988-07-21
AU593422B2 (en) 1990-02-08
NO172402C (no) 1993-07-14
JP2596593B2 (ja) 1997-04-02
NZ225536A (en) 1989-09-27
FI883504A0 (fi) 1988-07-25
DK407888A (da) 1989-01-26
AU1929488A (en) 1989-01-27
KR890002493A (ko) 1989-04-10
NO883274L (no) 1989-01-26
NO883274D0 (no) 1988-07-22
NO172402B (no) 1993-04-05
DE3864938D1 (de) 1991-10-24
DK170826B1 (da) 1996-01-29
ES2024596B3 (es) 1992-03-01
FI92083C (fi) 1994-09-26
CA1302021C (fr) 1992-06-02
FI883504A (fi) 1989-01-26
JPS6440694A (en) 1989-02-10
DE3724646A1 (de) 1989-02-02
EP0301372A1 (fr) 1989-02-01
ATE67538T1 (de) 1991-10-15
US4940514A (en) 1990-07-10
FI92083B (fi) 1994-06-15

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