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WO1992014881A1 - Boues aqueuses de matieres de charge finement pulverisees et leur utilisation pour produire du papier contenant des charges - Google Patents

Boues aqueuses de matieres de charge finement pulverisees et leur utilisation pour produire du papier contenant des charges Download PDF

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Publication number
WO1992014881A1
WO1992014881A1 PCT/EP1992/000328 EP9200328W WO9214881A1 WO 1992014881 A1 WO1992014881 A1 WO 1992014881A1 EP 9200328 W EP9200328 W EP 9200328W WO 9214881 A1 WO9214881 A1 WO 9214881A1
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WO
WIPO (PCT)
Prior art keywords
paper
fillers
weight
aqueous
filler
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.)
Ceased
Application number
PCT/EP1992/000328
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German (de)
English (en)
Inventor
Sigberg Pfohl
Werner Auhorn
Andreas Stange
Friedrich Linhart
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BASF SE
Original Assignee
BASF SE
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BASF SE filed Critical BASF SE
Priority to DE59202742T priority Critical patent/DE59202742D1/de
Priority to EP92904667A priority patent/EP0573458B1/fr
Publication of WO1992014881A1 publication Critical patent/WO1992014881A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • D21H17/46—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
    • 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
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/69—Water-insoluble compounds, e.g. fillers, pigments modified, e.g. by association with other compositions prior to incorporation in the pulp or paper

Definitions

  • the invention relates to aqueous slurries of finely divided fillers which are at least partially coated with polymers, and to the use of the aqueous slurries for the production of filler-containing paper or cardboard and filler-containing cardboard.
  • GB-A-2 125 838 discloses the treatment of fillers which are used for the production of paper with cationic polyelectrolytes and aluminum salts and, if appropriate, aluminates.
  • Suitable polyelectrolytes are, for example, cationic polyacrylamides, which are used in amounts of 0.1 to 6% by weight, based on the mixture.
  • the individual components are mixed in a dry state. When the filler mixture is introduced into a paper stock, the surfaces of the filler particles show a positive charge.
  • EP-A-278 602 discloses a process for the production of aqueous suspensions of fillers containing finely divided calcium carbonate, in which slurries containing at least 60% by weight of fillers are added an anionic and cationic polyelectrolyte in such a ratio that the filler particles carry a cationic charge.
  • Suitable cationic polyelectrolytes are, for example, polydiallyldimethylammonium chlorides with molecular weights of about 10,000 to 100,000.
  • the anionic polyelectrolytes are used in quantities of 0.01 to 0.1% by weight, based on filler, while the cationic polyelectrolytes in quantities of 0.01 to about 1.5 wt .-%, based on filler can be used.
  • These highly concentrated pigment slurries have a relatively low viscosity, however they cannot be used to produce papers with high dry strength.
  • DE-A-2 115 409 discloses the treatment of fillers which are used in the production of paper in aqueous slurry with water-soluble compounds which are deposited on the particulate fillers by adding aluminum sulfate, calcium chloride or borax.
  • Suitable water-soluble polymers are, for example, polyacrylates, which can be converted into a clear solution or into a clear gel by adding sodium hydroxide or ammonia, and also polyvinyl alcohol, casein or alginates. The treated like this
  • the anionic polymers contain up to 30 mol% of polymerized acrylic acid.
  • EP-B-0 193 111 describes a process for producing paper with high dry strength and as low as possible
  • wet strength is known, in which the paper stock is treated in succession with cationic polymers and then anionic polymers and dewatered to form sheets.
  • anionic See polymers include, for example, homopolymers of ethylenically unsaturated C 3 to C 5 carboxylic acids or copolymers of these carboxylic acids with amides, nitriles and / or esters of ethylenically unsaturated C 3 to C 5 carboxylic acids
  • the present invention has for its object to provide improved aqueous slurries of finely divided fillers for the production of filler-containing papers compared to the prior art.
  • the filler slurries should in particular be processable for the production of filled papers with high dry strength.
  • Another object is to make the fillers less sensitive to pH changes in paper manufacture and, in particular, to reduce the solubility of calcium sulfate pigments in water.
  • the object is achieved according to the invention with aqueous slurries of finely divided fillers, which are at least partially coated with polymers, for the production of filler-containing paper, which are obtainable by successive addition of
  • filler slurries are used for the production of filler-containing paper or cardboard or filler-containing cardboard by adding the aqueous slurry to a paper stock and dewatering the paper stock. This gives papers with high dry strength.
  • the coating of the fillers with the polymer has the effect that the fillers are incorporated into the fiber structure of the paper significantly better than untreated fillers, so that with the aqueous pigment slurries according to the invention, compared to known pigment slurries, significantly higher paper strengths can be achieved with the same filler content in the paper.
  • Suitable fillers are all those finely divided minerals that are usually used for the production of filler-containing paper. These are, for example, calcium carbonate, chalk, titanium dioxide, kaolin, china clay, satin white, calcium sulfate, barium carbonate and
  • the average particle size of the fillers is usually in the range from 0.1 to 5.0 ⁇ m.
  • the finely divided fillers are suspended in water.
  • the filler concentration of the aqueous slurry should be at least 10% by weight. Filler concentrations of up to 70% by weight are possible, but it is advisable to use a dispersant for more highly concentrated pigment slurries in order to be able to produce aqueous pigment slurries with a relatively low viscosity.
  • Suitable dispersants are, for example, polymers of acrylic acid with a K value of 8 to 40 or cationic dispersants such as low molecular weight polymers of diallyldimethylammonium chloride with average molecular weights of 1000 to 40,000.
  • the dispersants are used in quantities of 0.01 to 0.3, preferably 0.02 up to 0.05% by weight, based on the fillers. However, they are only used if the viscosity of the aqueous slurries of the finely divided pigments becomes too high.
  • aqueous pigment slurries described above are successively (a) with cationic strengthening agents and then (b) with nonionic or anionic strengthening agents, sizing agents or their mixtures or in reverse order, that is, first treated with the anionic component (b) and then with katicnic solidifiers (a).
  • the respective compounds in question are added to the pigment slurries in the form of an aqueous solution or an aqueous dispersion and are distributed as evenly as possible therein. This can be done, for example, with the aid of shaving units, such as ultraturrax devices, or in practice in a deliteur.
  • shaving units such as ultraturrax devices
  • Fillers are added, first add the other component (a) or (b) required for the treatment of the fillers, so that at least partially coated suspended filler particles are present. For example, people treated in this way
  • Calcium carbonate fillers also in the acidic pH range, e.g. at pH 5 to 6, practically without damage to the fillers used in papermaking.
  • Calcium sulfate fillers which have been provided with a coating in accordance with the invention therefore have a significantly reduced solubility in water in comparison with untreated calcium sulfate fillers.
  • the calcium sulfate pigments treated according to the invention are therefore of particular interest for the production of filled papers and paper products, such as cardboard and cardboard.
  • Calcium carbonate fillers and calcium sulfate fillers are preferably mixed with (a) cationic strengthening agents, e.g. Polyethyleneimine or water-soluble, crosslinked polyamidoamines followed by (b) alkydiketen emulsions, e.g.
  • the temperature of the aqueous suspensions of the fillers can be varied over a wide range of temperatures during the action of compounds (a) and (b), e.g. between 5 and 95 ° C.
  • the dry setting agents are brought together with the aqueous pigment slurries at temperatures in the range from 15 to 40 ° C.
  • Solidifiers (a) and (b) are all those polymers which reduce the dry strength of paper when added to the pulp in an amount of 0.5% by weight, based on dry fibers (for example bleached pine sulphate pulp as standard) increase at least 10%.
  • dry fibers for example bleached pine sulphate pulp as standard
  • wet strength of the paper can also be increased by the strengthening agents (a) or (b) which are considered according to the invention.
  • Suitable cationic hardeners (a) are, for example, polyethyleneimines which contain at least 5 ethyleneimine units. Both low molecular weight and very high molecular weight polyethyleneimines can be used.
  • the polyethyleneimines can be mixed with organic acids such as formic acid, acetic acid or propionic acid or also with inorganic acids such as hydrochloric acid.
  • Sulfuric acid or phosphoric acid can be neutralized.
  • Suitable polyethyleneimines in 10% by weight aqueous solution at 20 ° C have viscosities of 5 to 1500, preferably 25 to 700 mPas (Brookfield viscometer, 20 rpm).
  • Suitable cationic hardeners are also partially to completely hydrolyzed homopolymers and copolymers of N-vinylformamide.
  • the degree of hydrolysis of the N-vinylformamide in these polymers is at least 2 mol% and is preferably in the range from 50 to 100 mol%. For example, if one starts from a homopolymer of N-vinylformamide and hydrolyzes it to 100%, a polyvinylamine is obtained.
  • Copolymers of N-vinylformamide with other monomers for example vinyl acetate, vinyl propionate, acrylonitrile, methacrylonitrile, acrylamide and methacrylamide can also be hydrolyzed by the action of acids or bases.
  • the degree of hydrolysis which was given above, always refers to the N-vinylformamide content of the copolymer in the copolymer.
  • polymers are obtained which, in addition to the units of the monomers on which these polymers are based, also have units of vinylamine and vinyl alcohol.
  • Suitable homopolymers of N-vinylformamide and copolymers of N-vinylformamide with other ethylenically unsaturated monomers have a K value of 50 to 200, preferably 80 to 150. The K value of the hydrolyzed and the non-hydrolyzed N-vinylformamide polymers is correct within the error limits match.
  • Suitable hardeners (a) are also homopolymers and copolymers of N-vinylimidazole and N-vinylimidazole and their derivatives.
  • the cooo lers contain at least 30% by weight of N-vinylimi ⁇ azole or N-vinylimidazoline or their derivatives in the form of the salts polymerized with inorganic or organic acids or in the form of quaternization products.
  • Suitable comonomers for the preparation of the copolymers are, for example, acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, vinyl acetate, vinyl propionate and C 1 -C 4 -alkyl vinyl ether, for example vinyl methyl ether.
  • Suitable derivatives of N-vinyl imidazole and N-vinylimidazoline are, for example, the compounds which are substituted in the 2-position C 1 - to C 3 -alkyl or phenyl-substituted compounds, for example 1-vinyl-2-methylimidazoline in the form of the salt with hydrochloric acid.
  • water-soluble cationic strengthening agents (a) which increase both the dry strength and the wet strength of paper are polyamidoamines which are crosslinked with epichlorohydrin.
  • Suitable products of this type are known, for example, from US Pat. No. 2,926,116. They are made by combining a dicarboxylic acid such as adipic acid with a polyamine e.g.
  • Diethylenetriamine or tetraethylene pentamine condensed and the resin obtained crosslinked with epichlorohydrin to the extent that water-soluble reaction products are still obtained.
  • these polymers In 10% by weight aqueous solution at a temperature of 20 ° C., these polymers have a viscosity of 20 to 200 mPas (measured with a rotary viscometer at 20 rpm).
  • This group of cationic solidifiers also includes polyamidoamines grafted with ethyleneimine, which are crosslinked with epichlorohydrin or, according to DE-PS 24 34 816, with reaction products which, by reacting the terminal OH groups of
  • Polyalkylene oxides with 8 to 100 alkylene oxide units preferably polyethylene oxides
  • polyalkylene oxides end capped on both sides with epichlorohydrin.
  • the viscosity of the water-soluble products grafted and crosslinked with ethyleneimine - measured with a rotary viscometer at 20 rpm and a concentration of polycondensate of 10% by weight and 20 ° C. - is 300 to 2500 mPas.
  • homopolymers of diallyldi-C 1 -C 3 -alkylammonium compounds and diaikylmono-C 1 -C 3 -amines are suitable as cationic solidifiers (a). Either the free bases or the halides, in particular the chlorides or quaternized products can be used.
  • Homopolymers of diallyldimethylammonium chloride and diallyidiethylammonium chloride are particularly suitable.
  • Copolymers of acrylamide which have up to 45, preferably 2 to
  • C 4 alkyl (meth) acrylate copolymerized The basic acrylates are used in the form of the salts with inorganic or organic acids or in quaternized form.
  • copolymers of acrylic amide and diethyl aminoethyl acrylate or diethylaminoethyl methacrylate in the form of the hydrochloride or in the form quaternized with methyl chloride copolymers of acrylamide and diethylaminoethyl acrylate as sulfate, chloride and methosulfate, copolymers of acrylamide and dimethylaminopropyl sulfate as or methochloride, copolymers of acrylamide and aminoethyl acrylate hydrochloride, copolymers of acrylamide and diethylaminoethyl methacrylate sulfate and copolymers of acrylamide and diethylaminopropylacrylate hydrochloride.
  • Copolymers of acrylamide and dialkylaminoalkylacrylamides are also of interest as cationic hardeners (a), e.g. Copolymers of acrylamide which contain up to 30% by weight of polymerized dimethylaminoethyl acrylamide, dimethylaminoethyl methacrylamide, dimethylaminopropylacrylamide, dimethylaminobutylacrylamide or aminoethyl acrylamide. These hardeners are also used in salt form or in quaternized form.
  • the homopolymers and copolymers described above are known as strengthening agents for paper. They have K values of 50 to 200, preferably 80 to 150 (measured according to H. Fikentscher in a 1% strength aqueous solution of the polymer at 25 ° C. and pH 7).
  • polyamidoamines grafted with ethyleneimine which are crosslinked are used in practice predominantly as retention aids.
  • the quantities of polymers used are these compounds, strengthening agents which, for example, increase the dry and wet strength of the paper.
  • cationic solidifiers preference is given to polyethyleneimine with at least 5 polymerized ethylene lenimine units, water-soluble polyamidoamines onto which ethyleneimine is optionally grafted and which are crosslinked with epichlorohydrin or with a polyalkylene oxide which is closed on both sides with epichlorohydrin end groups, or copolymers of acrylamide and dimethylaminoethylacrylacrylate quaternized form with K values from 50 to 200.
  • an increase in filler retention can be achieved if mixtures of strengthening agents are used, e.g. a mixture of polyethyleneimine that contains 500 ethyleneimine units and a copolymer of acrylamide and 20% by weight dimethylaminoethyl acrylate methochloride with a K value of 190.
  • the cationic solidifiers are added to the aqueous slurries of the finely divided fillers in amounts of 0.1 to 5, preferably 1 to 2,% by weight. It is essential that they are used in such an amount that the finely divided fillers treated with them still carry a cationic charge even after the addition of the dry strength agent (b).
  • the charge of fillers which have been treated according to the invention can be determined, for example, by isolating the fillers from the aqueous slurry and determining the charge in the filtrate using electrolyte titration, cf. D.
  • Suitable anionic hardeners (b) are, for example, homopolymeric seeds of ethylenically unsaturated C 3 to C 5 carboxylic acids. These include, for example, homopolymers
  • the ethylenically unsaturated carboxylic acids mentioned can be copolymerized with other monomers.
  • anionic solidifying copolymers of 1 to 99% by weight of ethylenically unsaturated C 3 to C 5 carboxylic acids, 99 to 1% by weight of an amide, nitrile and / or an ester of an ethylenically unsaturated C 3 -bis are suitable C 5 carboxylic acid and 0 to
  • the copolymers preferably contain 5 to 20% by weight of an ethylenically unsaturated C 3 to C 5 carboxylic acid, 95 to
  • esters of ethylenically unsaturated C 3 to C 5 carboxylic acids of the copolymers are preferably derived from monohydric alcohols having 1 to 4 carbon atoms.
  • Particularly preferred as component (b) are terpolymers made from (1) 5 to 30% by weight of acrylic acid, (2) 90 to 65% by weight of acrylamide and (3) 5 to 30% by weight of acrylonitrile.
  • the anionic water-soluble polymers (b) have a K value (according to H. Fikentscher) from 50 to 200 and preferably from 80 to 150.
  • the K value for the copolymers is determined in 1% strength aqueous solution at 25 ° C.
  • the pH when determining the K values is 7.
  • Dry strength agents (b) can be used in the form of the free acids or in partially or completely neutralized form with bases. It is only important here that the partially or completely neutralized polymers are soluble in water.
  • Suitable bases are alkali and alkaline earths, ammonia and amines, e.g. Sodium hydroxide solution, potassium hydroxide solution, calcium hydroxide, barium hydroxide, ammonia, trimethylamine,
  • Nonionic hardeners (b) are polyvinyl alcohols which can be obtained, for example, by polymerizing vinyl acetate and saponifying the polymers.
  • Other suitable nonionic solidifiers are polyacrylamides, which are obtained by polymerizing
  • Acrylamide can be produced.
  • the nonionic hardeners have K values in the range from 50 to 200, preferably 80 to 150.
  • the hardeners (b) can be used individually or in a mixture, for example a mixture of polyacrylamide and a copolymer can be used as the dry hardener made of acrylamide and 20 wt .-% acrylic acid or a Use a mixture of an acrylamide homopolymer and acrylic acid homopolymer.
  • the dry strength agents (b) are added to the aqueous suspension of fillers in amounts of 0.1 to 5, preferably 1 to 3,% by weight.
  • the finely divided fillers are at least partially coated on the surface with polymers.
  • the opposite charge of the compounds of (a) and (b) causes polymers to deposit on the filler particles and adhere to them.
  • aluminum sulfate (alum) can optionally also be added in amounts of 0.1 to 3% by weight, based on the filler.
  • Non-ionic and / or anionic sizing agents for paper can also be used as component (b) in amounts of 0.1 to 5% by weight, based on the fillers. If the aqueous slurries of finely divided fillers obtainable in this way are used in the production of filler-containing papers, a markedly reduced water absorption is found compared to such filler-containing papers, which can be obtained using glue-free aqueous slurries of fillers, which are subsequently treated with a hardener (a) and ( b) have been treated.
  • Suitable sizing agents are, for example, aqueous emulsions of alkyldiketenes, e.g.
  • Acrylic acid in which the maleic anhydride is also hydrolyzed and at least partially neutralized with sodium hydroxide solution or ammonia, and copolymers of butyl acrylate and acrylonitrile, which are obtained by polymerizing the monomers in aqueous
  • the aqueous slurries of the finely divided fillers which have been treated in succession with components (a) and (b) or in reverse order and which carry a cationic charge, are used to produce filler-containing paper or cardboard and filler-containing cardboard.
  • the aqueous slurries become a paper stock which, in addition to the
  • Slurrying the fibers in water may also contain other additives customary in paper production, for example retention aids, defoamers or dyes, and added and mixed.
  • the paper stock mixed with the aqueous slurries of finely divided fillers is then dewatered in the customary manner on the paper machine.
  • the aqueous slurries of the pigments are added to the paper stock in such an amount that papers with filler contents of 5 to 70, preferably 20 to 40,% by weight are obtained.
  • the aqueous pigment slurries are also used for the production of filler-containing cardboard and of filler-containing cardboard.
  • the pigment slurries according to the invention can be used for the production of all filler-containing papers and paper products, for example for the production of writing, printing and packaging papers.
  • the papers can consist of a large number of different types of fiber materials, for example of sulfite or sulfate pulp in the bleached or unbleached state, wood pulp, thermomechanical material (TMP), chemo-thermomechanical material (CTMP) and waste paper.
  • TMP thermomechanical material
  • CMP chemo-thermomechanical material
  • waste paper waste paper.
  • the papermaking takes place in the pH range from 4 to 9, preferably at pH values from 6 to 7.
  • sulfuric acid or aluminum sulfate can be added to the stock suspension.
  • the percentages in the examples mean percent by weight.
  • the dry tear length was determined according to DIN 53 112, sheet 1.
  • the whiteness of the paper was determined at 457 ⁇ m with a conventional color measuring device.
  • the charge density was determined using an electrolyte titration with a Mütek PCD device, Mütek laser and optoelectronic devices GmbH, D-8036 Herrsching.
  • the K values of the polymers were determined according to H. Fikentscher,
  • Example 1 Aqueous suspension of china clay
  • aqueous solution has a viscosity of 30 mPas.
  • the slurry is then stirred for 5 minutes and mixed with 1.8%, based on china clay, of a copolymer of 80% acrylamide and 20% acrylic acid, which in the form of
  • Sodium salt has a K value of 120 (anionic dry strength agent).
  • the solid particles contained in the slurry had a polymer coating and had a positive charge.
  • a paper made from 85% bleached wood pulp and 15% bleached pine sulfate pulp with a basis weight of 80 g / m 2 was produced on a test paper machine with a working width of 75 cm at a speed of 60 m / min.
  • the pH of the stock suspension was 7.5, the freeness 60 ° Schopper-Riegler (° SR).
  • the aqueous suspension of china clay according to a) was metered in continuously in an amount such that the mixture prepared from the mixture was added to the fibrous suspension described above Paper had an ash content of about 30%.
  • Example 1b Comparative Example 1 Example 1b) was repeated with the exception that an untreated 20% aqueous suspension of china clay was used instead of the aqueous slurry a) treated with dry strength agents to produce paper.
  • the properties of paper made therefrom are given in Table 1.
  • Example 2 aqueous slurry of china clay
  • a 20% aqueous slurry is first prepared and with vigorous stirring with 1.2%, based on china clay, with a copolymer of 80% acrylamide and 20% dimethylaminoethyl acrylate methochloride with a K value of 130 (cationic dry strength agent) added. After stirring for 5 minutes, 0.6%, based on, is added to the filler slurry
  • Example 2a Paper was produced in accordance with the instructions given in Example 1b), with the only exception that the China Clay slurry used in Example 2a) was used instead of the treated China clay slurry used therein, The properties of the paper thus obtainable are given in Table 2.
  • Example 3 Aqueous suspension of china clay Sufficient china clay with an average particle size of 1 to 3 ⁇ m is introduced into water with vigorous stirring that a 20% aqueous suspension of china clay is formed. Then, with vigorous stirring, 1.2%, based on china clay, of a copolymer of 80% acrylamide and 20% dimethylaminoethyl acrylate methochloride with a K value of 130 (cationic dry strength agent) is added, the suspension is stirred for 5 minutes and mixed then with 0.6%, based on china clay, of a copolymer of 90% acrylamide and 10% acrylic acid in the form of the sodium salt with a K value of 100 (anionic dry strength agent). The solid particles are then covered with a polymer film and carry a positive charge. Aluminum sulfate was then added to the slurry until the pH was 4.5. b) Production of paper
  • Example 1b was repeated with the only exception that the china clay slurry obtained according to example 3a) was now used instead of the aqueous slurry used there.
  • the properties of the paper thus obtained are shown in Table 3. Comparative Example 5 Comparative Example 1 was repeated.
  • the properties of the paper obtained are given in Table 3.
  • Comparative Example 6 (comparison according to DE-A-32 43 904) A 20% aqueous slurry of china clay was mixed with 1.8% of a copolymer of 80% acrylamide and 20% dimethylaminoethyl acrylate methochloride with a K value of 130 and then adjusted to pH 4.5 by adding aluminum sulfate. This filler suspension was then used instead of the suspension la) specified in Example 1b) for the production of paper. The properties of the paper thus obtainable are given in Table 3.

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  • Chemical Kinetics & Catalysis (AREA)
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Abstract

On produit des boues aqueuses de matières de charge finement pulvérisées et, au moins partiellement, enrobées de polymères, en ajoutant successivement à une boue aqueuse de matières de charge 0,1 à 5 % en poids d'un agent cationique de consolidation du papier et/ou 0,1 à 5 % en poids d'un agent non ionique et/ou anionique de consolidation et/ou d'encollage du papier, par rapport au poids des matières de charge. On utilise une quantité d'agent cationique de consolidation, par rapport aux agents anioniques de consolidation et/ou d'encollage, telle que les matières de charge finement pulvérisées présentent une charge cationique. L'invention concerne également l'utilisation des boues aqueuses de matières de charge finement pulvérisées ainsi obtenues pour produire du papier, du carton ou du carton-pâte contenant des charges par adjonction des boues aqueuses à la pâte à papier et par déshydratation de la pâte à papier.
PCT/EP1992/000328 1991-02-26 1992-02-17 Boues aqueuses de matieres de charge finement pulverisees et leur utilisation pour produire du papier contenant des charges Ceased WO1992014881A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE59202742T DE59202742D1 (de) 1991-02-26 1992-02-17 Wässrige anschlämmungen von feinteiligen füllstoffen und ihre verwendung zur herstellung von füllstoffhaltigem papier.
EP92904667A EP0573458B1 (fr) 1991-02-26 1992-02-17 Boues aqueuses de matieres de charge finement pulverisees et leur utilisation pour produire du papier contenant des charges

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4105919A DE4105919A1 (de) 1991-02-26 1991-02-26 Waessrige anschlaemmungen von feinteiligen fuellstoffen und ihre verwendung zur herstellung von fuellstoffhaltigem papier
DEP4105919.0 1991-02-26

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WO1992014881A1 true WO1992014881A1 (fr) 1992-09-03

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PCT/EP1992/000328 Ceased WO1992014881A1 (fr) 1991-02-26 1992-02-17 Boues aqueuses de matieres de charge finement pulverisees et leur utilisation pour produire du papier contenant des charges

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EP (1) EP0573458B1 (fr)
AT (1) ATE124484T1 (fr)
DE (2) DE4105919A1 (fr)
WO (1) WO1992014881A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020681A1 (fr) * 1993-03-03 1994-09-15 Basf Aktiengesellschaft Boues pigmentees aqueuses, leur procede de production et leur utilisation dans la production de papier contenant des charges
WO1995010662A1 (fr) * 1993-10-15 1995-04-20 Basf Aktiengesellschaft Dispersions de pigment aqueuses et leur utilisation dans la production de papier charge
WO1996024721A1 (fr) * 1995-02-08 1996-08-15 Diatec Environmental Company Compositions a base de matiere de remplissage pigmentaire et leurs procedes de preparation et d'utilisation
WO2003074786A3 (fr) * 2002-03-05 2004-03-25 Basf Ag Boues aqueuses de charges a fines particules, procede de production et utilisation desdites boues aqueuses dans la fabrication de papiers charges
WO2006128814A1 (fr) * 2005-05-31 2006-12-07 Basf Aktiengesellschaft Hybrides polymere/pigment destines a la fabrication de papier
WO2009004079A1 (fr) * 2007-07-05 2009-01-08 Basf Se Procédé pour préparer des suspensions de charges en fines particules et leur utilisation pour produire des papiers à teneur en charges et à résistance à sec élevées
WO2012168398A1 (fr) 2011-06-10 2012-12-13 Basf Se Composition pulvérulente et utilisation de ladite composition pour la production de papier
US8753481B2 (en) 2011-06-10 2014-06-17 Basf Se Powder composition and use thereof for paper production

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US6294645B1 (en) 1997-07-25 2001-09-25 Hercules Incorporated Dry-strength system
DE19939060B4 (de) * 1999-08-18 2006-09-14 Papierfabrik Schoeller & Hoesch Gmbh & Co. Kg Verfahren zum Herstellen eines Papiers, Papier und Verwendung eines Papiers
CN101397766B (zh) 2007-07-05 2013-05-22 巴斯夫欧洲公司 细碎填料水浆的制备及其用于制造高填料含量和高干强度纸的用途
CA2729498A1 (fr) 2008-07-03 2010-01-07 Basf Se Suspensions aqueuses de fines matieres de charge, leur procede de production et leur utilisation pour fabriquer des papiers contenant des matieres de charge
PT2300664E (pt) 2008-07-03 2013-12-24 Basf Se Suspensões aquosas de agentes de enchimento de partículas finas, método para a sua preparação e uso das mesmas para o fabrico de papéis contendo agentes de enchimento
WO2010020551A1 (fr) * 2008-08-18 2010-02-25 Basf Se Procédé pour améliorer la résistance à sec du papier, du carton-pâte et du carton

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WO1982002730A1 (fr) * 1981-02-11 1982-08-19 Jozsef Erdelyi Composition d'agent de remplissage inorganique de grande retention pour l'industrie du papier
EP0193111A2 (fr) * 1985-02-27 1986-09-03 BASF Aktiengesellschaft Procédé de fabrication de papier à résistance élevée à l'état sec
EP0278602A1 (fr) * 1987-01-23 1988-08-17 Ecc International Limited Suspensions aqueuses des charges contenant du calcium

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CA1110019A (fr) * 1978-04-24 1981-10-06 Kenichi Honma Methode de fabrication de papier a resistance amelioree a l'etat sec
WO1982002730A1 (fr) * 1981-02-11 1982-08-19 Jozsef Erdelyi Composition d'agent de remplissage inorganique de grande retention pour l'industrie du papier
EP0193111A2 (fr) * 1985-02-27 1986-09-03 BASF Aktiengesellschaft Procédé de fabrication de papier à résistance élevée à l'état sec
EP0278602A1 (fr) * 1987-01-23 1988-08-17 Ecc International Limited Suspensions aqueuses des charges contenant du calcium

Cited By (10)

* Cited by examiner, † Cited by third party
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WO1994020681A1 (fr) * 1993-03-03 1994-09-15 Basf Aktiengesellschaft Boues pigmentees aqueuses, leur procede de production et leur utilisation dans la production de papier contenant des charges
WO1995010662A1 (fr) * 1993-10-15 1995-04-20 Basf Aktiengesellschaft Dispersions de pigment aqueuses et leur utilisation dans la production de papier charge
WO1996024721A1 (fr) * 1995-02-08 1996-08-15 Diatec Environmental Company Compositions a base de matiere de remplissage pigmentaire et leurs procedes de preparation et d'utilisation
WO2003074786A3 (fr) * 2002-03-05 2004-03-25 Basf Ag Boues aqueuses de charges a fines particules, procede de production et utilisation desdites boues aqueuses dans la fabrication de papiers charges
WO2006128814A1 (fr) * 2005-05-31 2006-12-07 Basf Aktiengesellschaft Hybrides polymere/pigment destines a la fabrication de papier
US8343312B2 (en) 2005-05-31 2013-01-01 Basf Aktiengesellschaft Polymer-pigment hybrids for use in papermaking
WO2009004079A1 (fr) * 2007-07-05 2009-01-08 Basf Se Procédé pour préparer des suspensions de charges en fines particules et leur utilisation pour produire des papiers à teneur en charges et à résistance à sec élevées
US8197641B2 (en) 2007-07-05 2012-06-12 Basf Se Preparation of aqueous slurries of finely divided fillers and their use for the production of papers having a high filler content and high dry strength
WO2012168398A1 (fr) 2011-06-10 2012-12-13 Basf Se Composition pulvérulente et utilisation de ladite composition pour la production de papier
US8753481B2 (en) 2011-06-10 2014-06-17 Basf Se Powder composition and use thereof for paper production

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EP0573458B1 (fr) 1995-06-28
ATE124484T1 (de) 1995-07-15
DE59202742D1 (de) 1995-08-03
EP0573458A1 (fr) 1993-12-15
DE4105919A1 (de) 1992-08-27

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