EP0509878A1 - Alkaliquellende, ziemlich unlöslichen Latex enthaltende wässerige Zusammensetzung zur Beschichtung von Papier - Google Patents

Alkaliquellende, ziemlich unlöslichen Latex enthaltende wässerige Zusammensetzung zur Beschichtung von Papier Download PDF

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Publication number
EP0509878A1
EP0509878A1 EP92400961A EP92400961A EP0509878A1 EP 0509878 A1 EP0509878 A1 EP 0509878A1 EP 92400961 A EP92400961 A EP 92400961A EP 92400961 A EP92400961 A EP 92400961A EP 0509878 A1 EP0509878 A1 EP 0509878A1
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EP
European Patent Office
Prior art keywords
latex
weight
composition according
acid
carboxylic acid
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.)
Granted
Application number
EP92400961A
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English (en)
French (fr)
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EP0509878B1 (de
Inventor
Mathieu Joanicot
Jean-Pierre Lavallee
Roland Reeb
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Ciba Specialty Chemicals Oy
Original Assignee
Rhone Poulenc Chimie SA
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.)
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Application granted granted Critical
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Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof

Definitions

  • the present invention relates to an aqueous composition for coating paper comprising an alkalinating latex substantially insoluble in water.
  • composition for coating of paper one generally indicates an aqueous coating composition essentially containing a filler (pigment), a binder and possibly various adjuvants.
  • Such a composition is applied to paper in order to modify the surface properties, in particular the whiteness, the gloss, the printability, etc.
  • a hydrocolloid or a natural thickening agent such as carboxymethylcellulose, or synthetic such as polyvinyl alcohol and alkali-soluble latexes is usually used.
  • Water retention of a paper coating composition is defined as the ability of the composition to resist this transfer of water.
  • alkaline swelling latex is meant according to the invention, a swelling latex with alkalis (in particular, soda, potash, ammonia) contained or added in the aqueous emulsion.
  • alkalis in particular, soda, potash, ammonia
  • These latexes allow producing coating compositions whose viscosities increase with the pH in the alkaline range.
  • alkalinating latex improves the water retention and the rheological properties of the coating composition.
  • Such insoluble alkali-swelling latexes are for example described by FR-A 2,444,114 from a styrene / butadiene / acrylic acid copolymer whose viscosity of the coating bath is stabilized by addition of a polyalkylene glycol as well as in the patent.
  • US-A 3,793,244 where acrylic acid is replaced by itaconic acid.
  • 1,3-butadiene is very hydrophobic, which requires the use of large quantities of acidic monomers which are the cause of the passage into polymer solution, which has the consequence of greatly increasing the viscosity of the bath and of degrading. the binding power.
  • this patent teaches neither the size of the latex particles nor the fact that the pigment must necessarily contain at least 40% CaCO3.
  • the present invention aims to provide a coating composition for paper having better water retention and better machinability.
  • composition of the above type the pigment of which comprises at least 40% CaCO3, having acceptable gloss while exhibiting suitable water retention and a high dry extract.
  • composition of the above type the binder part of which is a mixture of two water-insoluble latexes, one of which is alkaline, said mixture being stable on storage at a neutral or slightly acidic pH.
  • the ratio ⁇ A / ⁇ B measured at a pH between 2 and 4 is between 1.4 and 6, preferably between 1.8 and 3.0 even more preferably this ratio is close to 2.
  • Latex A is a film-forming latex which is substantially insoluble and non-alkalinizing in alkaline solutions with a pH greater than 8, preferably greater than 9 and less than 13.
  • Latex A can in fact be an organic polymer latex used usually for coating paper, insofar as it is a film-forming latex, substantially insoluble and non-alkalinizing, the diameter ⁇ A of the polymer particles of which is between 60 and 300 nm.
  • Latex A is preferably a copolymer based on styrene / 1,3-butadiene. More particularly suitable are copolymers based on 25 to 60% by weight of butadiene, 40 to 75% by weight of styrene and 0 to 6% of ethylenically unsaturated monomers comprising at least one carboxylic acid function and their monoesters with an alkanol in C1 - C8.
  • Examples of monomeric carboxylic acids which can be used are acrylic acid, methacrylic acid or its dimer, fumaric acid, crotonic acid, itaconic acid, maleic acid and also the monoesters of the above acids. with C1 -C8 alkanols, such as methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethyl hexyl acrylate, methacrylate methyl, ethyl methacrylate and n-butyl methacrylate.
  • C1 -C8 alkanols such as methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethyl hexyl acrylate, methacrylate methyl, ethyl methacrylate and n-butyl methacrylate.
  • Latex B is preferably a copolymer: monoester of ethylenically unsaturated carboxylic acid / ethylenically unsaturated carboxylic acid / vinylaromatic and / or vinyl nitrile.
  • ethylenically unsaturated carboxylic acid monoester it is recommended to use the acrylates, methacrylates, fumarates and maleates of methyl, ethyl, isopropionic, propionic, isobutyl, n-butyl, tert-butyl and 2-ethylhexyl alcohol. .
  • an acid or a mixture of acids mentioned above can be used for latex A, namely preferably acrylic acid, methacrylic acid, itaconic acid, fumaric acid and maleic acid.
  • Latex B further comprises a third monomer chosen from a vinyl aromatic monomer such as styrene and methylstyrene and / or a vinyl nitrile such as acrylonitrile and methacrylonitrile.
  • a vinyl aromatic monomer such as styrene and methylstyrene
  • a vinyl nitrile such as acrylonitrile and methacrylonitrile.
  • Latex B also comprises a monomer comprising at least 2 ethylenic unsaturations and playing the role of crosslinking agent incorporated during the polymerization of the monomers.
  • This crosslinking agent can in particular be chosen from ethylene glycol di (meth) acrylate, tripolypropylene glycol diacrylate, trimethylolpropane tri (meth) acrylate, allyl (meth) acrylate, diallyl maleate, triallyl cyanurate, divinylbenzene and methylene-bis acrylamide.
  • crosslinking agents are used, preferably in an amount of 0.1 to 5%, preferably from 0.2 to 1% by weight relative to the total weight of monomer, the preferred crosslinking agents being ethylene glycol dimethacrylate and divinylbenzene .
  • a latex B which is more particularly suitable is a copolymer comprising 55 to 65% by weight of unsaturated carboxylic acid ester, preferably ethyl acrylate, 10 to 20% by weight of unsaturated carboxylic acid, preferably methacrylic acid, 20 to 32% by weight of styrene and 0.1 to 5% by weight of crosslinking agent.
  • a particularly suitable monomer mixture comprises 58 to 60% by weight of ethyl acrylate, 14 to 16% by weight of methacrylic acid and 25 to 27% by weight of styrene and 0.2% to 1% by weight of crosslinking agent.
  • the polymerization of latex B is carried out, in a manner known per se, in one or more stages.
  • the monomers can be preemulsified with water in the presence of an anionic or nonionic emulsifying agent, which usually uses about 0.01 to 10%, calculated based on the weight of total monomers.
  • a free radical generator type polymerization initiator such as ammonium or potassium persulfate, can be used alone or in combination with an accelerator, such as sodium metabisulfite or sodium thiosulfate, sodium formaldehyde sulphoxylate as well as metal ions (iron, cobalt, copper ).
  • free radical generators such as azo (2,2'-azobisisobutyronitrile, 4,4'-azobis (4-cyanopentanoic acid) ...) or peroxides such as hydrogen peroxide or tert-butyl hydroperoxide or cumene hydroperoxide in combination with a reducing agent.
  • the initiator and the accelerator constituting jointly what is usually called catalyst, can be used in an amount of 0.1 to 2% each based on the weight of monomers to be copolymerized.
  • the polymerization temperature can be between 30 ° C and 100 ° C, more favorably between 50 ° C and 90 ° C.
  • cross-linking agents which are monomers having several, that is to say at least 2 ethylenic unsaturations, are incorporated during the polymerization, in an amount ranging from 0.1 to 5%.
  • monomers include ethylene glycol di (meth) acrylate, tripopylene glycol diacrylate, trimethylolpropane tri (meth) acrylate, allyl (meth) acrylate, diallyl maleate, triallylcyanurate, divinylbenzene, methylene-bis acrylamide.
  • latex B can be adjusted to a neutral or slightly acidic pH of between 4 and 7 using one or more bases such as alkali hydroxides, ammonia or water-soluble organic amines such as 2-amino 2-methylpropanol, diethylaminoethanol or alternatively quaternary ammoniums such as tetrabutylammonium hydroxide.
  • bases such as alkali hydroxides, ammonia or water-soluble organic amines such as 2-amino 2-methylpropanol, diethylaminoethanol or alternatively quaternary ammoniums such as tetrabutylammonium hydroxide.
  • the aqueous coating composition has a concentration of dry extracts, that is to say of solid materials (pigment plus latex particles A and B) preferably between 60 and 80% by weight, preferably between 65 and 75%.
  • Latex A can have a dry extract of 40 to 60% by weight, preferably between 50 and 55%.
  • Latex B advantageously has a dry extract of between 30 and 50% and preferably between 40 and 45% by weight.
  • pigment for 100 parts by weight of pigment, there are 5 to 20 parts of dry extracts of latex A and 8, preferably between 7 and 15 parts.
  • At least 40% by weight of the pigment consists of CaCO3, the rest being chosen from the mineral pigments usually chosen for coating paper such as natural or calcined clay, kaolin, barium sulphate, titanium oxide , talc, hydrated alumina, bentonite and calcium sulfoaluminate (satin white).
  • the pigment is constituted by ground CaCO3 and / or precipitation optionally treated with a fatty acid ester such as calcium stearate.
  • At least 50% by weight of the pigment has a particle size of less than 2 ⁇ m, preferably less than 1 ⁇ m, the rest having a particle size between 2 and 10 ⁇ m.
  • the fine-grained pigments can advantageously consist of precipitation CaCO3, kaolin, calcined clay or hydrated alumina, the coarser particle-size pigments generally consist of CaCO3 and baryte (crushed natural barium sulfate) .
  • the coating compositions according to the invention have, before the addition of alkali (preferably NH4 OH or NaOH so as to reach a pH between 8 and 13 preferably between 9 and 10), have an apparent viscosity between 50 and 1000 mPa.s at 25 ° C.
  • alkali preferably NH4 OH or NaOH
  • compositions after addition of alkali have an apparent viscosity generally between 4000 and 25000 mPas at 25 ° C. preferably between 5000 and 10000 mPa.s. (Brookfield 10 rpm).
  • the latex emulsion A the latex emulsion B are prepared and it is recommended to add, by homogenizing the latex emulsion B into the latex emulsion A, having first adjusted the pH of the latex A between 4 and 7, preferably between 5.5 and 6.5.
  • the mixture of latexes A and B is stable on storage at a pH preferably between 5 and 7 for at least several months.
  • stable on storage means mainly according to the invention that no appreciable change in the viscosity, the particle size of the emulsions and the pH of the mixture is observed.
  • a pigment mixture based on CaCO3 defined above is incorporated into this latex mixture by simple mixing and without particular precautions.
  • the pH is adjusted between 8 and 13 and preferably between 9 and 10 and the coating composition is ready for use.
  • the coating compositions according to the invention can be used as such without the addition of conventional natural binders such as casein, starch, carboxymethylcellulose or synthetic thickeners such as polyvinyl alcohol and alkali-soluble latexes as for example described by US-A 4,397,984; they are more particularly recommended for coated papers and are used more particularly for printing in roto offset, offset and lithography.
  • conventional natural binders such as casein, starch, carboxymethylcellulose or synthetic thickeners such as polyvinyl alcohol and alkali-soluble latexes as for example described by US-A 4,397,984; they are more particularly recommended for coated papers and are used more particularly for printing in roto offset, offset and lithography.
  • compositions according to the invention can be used in an amount of 5 to 30 g, preferably 10 to 20 g of composition per m2 (1 side) of paper.
  • the viscosities are Brookfield viscosities measured at 23 ° C. In addition, unless otherwise indicated, all% and parts are by weight.
  • the temperature of the reaction medium is kept constant at 82 ° C throughout the duration of the polymerization.
  • the latex B obtained in Example 1 is neutralized with dilute ammonia (2%).
  • the evolution of the particle size as a function of the pH is measured by diffusion of quasielastic light using a NANO-SIZER® from the company COULTER.
  • buffer solutions In order to keep the pH of the latex constant, it is diluted in buffer solutions whose pH is identical to that of the latex. Buffer solutions are prepared according to the HANDBOOK OF CHEMISTRY AND PHYSICS Section D.
  • C1 and C2 are used in aqueous slip at 70% by weight of carbonate.
  • C1 has 90% of particles having a particle size less than 2 ⁇ m and 60% of particles having a particle size less than 1 ⁇ m.
  • C2 has 95% of particles having a particle size less than 2 ⁇ m and 78% of particles having a particle size less than 1 ⁇ m.
  • Carboxymethylcellulose : CMC is used in Comparative Examples 4 and 6 in place of latex B.
  • Dispex N40® sodium salt of a low molecular weight polyacrylate.
  • Example 3 To produce the coating composition of Example 3, the ingredients below are mixed, the parts by weight of which are calculated on a dry basis.
  • C1 is dispersed in water in a high speed mixer in the presence of D1 which serves as a dispersing agent for C1 and the mixture of latex A and latex B is added having previously adjusted the pH of latex A between 6 and 6.5.
  • the solid content is adjusted to 73.50% by weight, then the pH of the mixture is brought to 9-10 by addition of an ammonia solution and the viscosity and water retention of the mixture are measured.
  • Water retention is evaluated by conductimetric measurement of the speed of passage of a blotting paper by the water released by the coating bath. This test known as the Warren test is described in the review TAPPI, Volume 41, No. 2, page 77 of February 1958.
  • Paper is coated on a Bachofen® pilot machine which is a high speed doctor blade coating machine; the angle of the blade is 45 ° C; the coating speed is 300 m / min, the speed of the ink roller is 70 m / min, drying in dry air is carried out at 185 ° C; 11 g / m2 of dry matter are deposited.
  • the humidity relative to the coated paper is 4.5%.
  • the gloss of the paper (75 °) and the gloss of the ink (75 °) are measured using an ERICHSEN® glossmeter and a PRUFBAU® press, the printing force is set to 800 N.
  • LORILLEUX® 3805 or 3808 ink is used for this using an electric IGT press, the final speed of which is set at 2 m / s.
  • Resistance to wet peeling is done with LORILLEUX® 3801 ink on a PRUFBAU® press under a printing force of 800N at a speed of 0.5 m / s.
  • the optical density (OD) of the wet black inked area and the optical density (OD) of the torn off wet area are measured.
  • the wet tearing score is given by the ratio of the DO of the wet part to the OD of the dry part.
  • the ink refusal makes it possible to appreciate the repulsion of the ink by water during the offset printing of a wet coated paper.
  • a PRUFBAU® press fitted with a wetting device and HUBER® n ° 1 ink at a printing force of 800 N.
  • the OD of the inked non-wet area and the OD of the wet area are measured.
  • the ink refusal is then the ratio of the average optical density of the dry part to the average of the optical density of the wet part.
  • Example 5 To produce the coating compositions of Comparative Examples 4 and and of Example 5, the procedure is exactly as in Example 3 except that the coating composition is modified in accordance with the indications in Table 2. The results obtained are collated in the table 2 below.
  • a gain in gloss of the paper and ink is also obtained, in particular in the case of C1. Furthermore, the binding power of the coating composition is, in the case of Examples 3 and 5 at least equivalent if not greater (dry stripping) than that of the compositions of Comparative Examples 4 and 6 comprising CMC instead latex B.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Paints Or Removers (AREA)
  • Glass Compositions (AREA)
  • Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)
EP92400961A 1991-04-15 1992-04-07 Alkaliquellende, ziemlich unlöslichen Latex enthaltende wässerige Zusammensetzung zur Beschichtung von Papier Expired - Lifetime EP0509878B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9104565 1991-04-15
FR9104565A FR2675165B1 (fr) 1991-04-15 1991-04-15 Composition aqueuse pour couchage de papier comportant un latex alcaligonflant sensiblement insoluble.

Publications (2)

Publication Number Publication Date
EP0509878A1 true EP0509878A1 (de) 1992-10-21
EP0509878B1 EP0509878B1 (de) 1998-07-01

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EP92400961A Expired - Lifetime EP0509878B1 (de) 1991-04-15 1992-04-07 Alkaliquellende, ziemlich unlöslichen Latex enthaltende wässerige Zusammensetzung zur Beschichtung von Papier

Country Status (7)

Country Link
US (1) US5563201A (de)
EP (1) EP0509878B1 (de)
AT (1) ATE167909T1 (de)
BR (1) BR9201346A (de)
ES (1) ES2121831T3 (de)
FI (1) FI110386B (de)
FR (1) FR2675165B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700329A1 (fr) * 1993-01-13 1994-07-13 Rhone Poulenc Chimie Compositions pour ciment comprenant un latex alcaligonflant et ciments obtenus à partir de ces compositions.
EP0724663B1 (de) * 1993-10-19 1998-09-23 Basf Aktiengesellschaft Verwendung von mit bestimmten bindemittelmischungen beschichtetem papier für den offsetdruck
WO2002044471A1 (en) * 2000-11-24 2002-06-06 Metso Paper, Inc. Method for coating paper
US6521701B2 (en) 1998-11-10 2003-02-18 Coatex S.A.S. Water-retaining and optical-brightener-activating polymer composition, paper coating colors and sheets of coated paper thus obtained
WO2007069037A1 (fr) 2005-12-16 2007-06-21 Coatex S.A.S. Procede de fabrication de sauces de couchage a la retention d'eau et a la viscosite brookfieldtm ameliorees mettant en oeuvre un polymere peigne avec au moins une fonction greffee oxyde de polyalkylene
EP2075374A1 (de) 2007-12-17 2009-07-01 Omya Development AG Verfahren zur Herstellung einer Streichmasse unter Einbringung eines acrylischen Verdickers mit verzweigter wasserabweisender Kettenstruktur und so erhaltene Streichmasse
US7972386B2 (en) 2005-10-12 2011-07-05 Conopco, Inc. Bleaching of substrates
US7976582B2 (en) 2007-01-16 2011-07-12 Conopco, Inc. Bleaching of substrates
US8455423B2 (en) 2005-05-27 2013-06-04 Conopco, Inc. Process of bleaching
US9469666B2 (en) 2010-03-03 2016-10-18 Catexel Limited Preparation of bleaching catalysts

Families Citing this family (16)

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Publication number Priority date Publication date Assignee Title
US5981668A (en) * 1996-10-31 1999-11-09 Sanyo Chemical Industries, Ltd. Anti-bacterial water absorbing agent and anti-bacterial water absorbent material
DE10008276A1 (de) * 2000-02-23 2001-08-30 Basf Ag Papierstreichmassen auf Basis von gering vernetzten Bindemitteln
US6547929B2 (en) * 2000-04-12 2003-04-15 Rohm And Haas Company Paper having improved print quality and method of making the same
US6951250B2 (en) * 2003-05-13 2005-10-04 Halliburton Energy Services, Inc. Sealant compositions and methods of using the same to isolate a subterranean zone from a disposal well
US6884468B1 (en) 2003-10-27 2005-04-26 Basf Ag Method of making a paper coating using a blend of a vinyl aromatic-acrylic polymer dispersion with a vinyl aromatic-diene polymer dispersion
US7607483B2 (en) * 2004-04-19 2009-10-27 Halliburton Energy Services, Inc. Sealant compositions comprising colloidally stabilized latex and methods of using the same
US20070111900A1 (en) * 2005-11-11 2007-05-17 Reddy B R Sealant compositions comprising solid latex
US20070111901A1 (en) * 2005-11-11 2007-05-17 Reddy B R Method of servicing a wellbore with a sealant composition comprising solid latex
US7488705B2 (en) * 2004-12-08 2009-02-10 Halliburton Energy Services, Inc. Oilwell sealant compositions comprising alkali swellable latex
US8703659B2 (en) 2005-01-24 2014-04-22 Halliburton Energy Services, Inc. Sealant composition comprising a gel system and a reduced amount of cement for a permeable zone downhole
US20060167133A1 (en) * 2005-01-24 2006-07-27 Jan Gromsveld Sealant composition comprising a crosslinkable material and a reduced amount of cement for a permeable zone downhole
US7267174B2 (en) * 2005-01-24 2007-09-11 Halliburton Energy Services, Inc. Methods of plugging a permeable zone downhole using a sealant composition comprising a crosslinkable material and a reduced amount of cement
US7576042B2 (en) * 2006-02-28 2009-08-18 Halliburton Energy Services, Inc. Salt water stable latex cement slurries
CN107428787A (zh) 2011-09-08 2017-12-01 卡特克塞尔科技有限公司 催化剂
US20140162910A1 (en) 2012-12-10 2014-06-12 Halliburton Energy Services, Inc. Wellbore Servicing Compositions and Methods of Making and Using Same
US10066146B2 (en) 2013-06-21 2018-09-04 Halliburton Energy Services, Inc. Wellbore servicing compositions and methods of making and using same

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DE1919379A1 (de) * 1968-04-16 1969-10-23 Ici Ltd Waessrige UEberzugsmasse
US3963843A (en) * 1972-12-20 1976-06-15 Domtar Limited Production of coated paper
FR2444114A1 (fr) * 1978-12-14 1980-07-11 Polysar Ltd Procede pour elever la viscosite d'une composition de couchage de papier, composition obtenue par ce procede et papier couche au moyen de cette composition
EP0244250A1 (de) * 1986-05-02 1987-11-04 The Dow Chemical Company Latex eines synthetischen Polymers und Verfahren zur Herstellung eines beschichteten Papiers mit niedrigem Glanz unter Anwendung des Latex

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DE1919379A1 (de) * 1968-04-16 1969-10-23 Ici Ltd Waessrige UEberzugsmasse
US3963843A (en) * 1972-12-20 1976-06-15 Domtar Limited Production of coated paper
FR2444114A1 (fr) * 1978-12-14 1980-07-11 Polysar Ltd Procede pour elever la viscosite d'une composition de couchage de papier, composition obtenue par ce procede et papier couche au moyen de cette composition
EP0244250A1 (de) * 1986-05-02 1987-11-04 The Dow Chemical Company Latex eines synthetischen Polymers und Verfahren zur Herstellung eines beschichteten Papiers mit niedrigem Glanz unter Anwendung des Latex

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2700329A1 (fr) * 1993-01-13 1994-07-13 Rhone Poulenc Chimie Compositions pour ciment comprenant un latex alcaligonflant et ciments obtenus à partir de ces compositions.
EP0607074A1 (de) * 1993-01-13 1994-07-20 Rhone-Poulenc Chimie Alkaliquellenden Latex enthaltende Zementmassen und über diese Zusammensetzungen hergestellte Zemente
EP0724663B1 (de) * 1993-10-19 1998-09-23 Basf Aktiengesellschaft Verwendung von mit bestimmten bindemittelmischungen beschichtetem papier für den offsetdruck
US6521701B2 (en) 1998-11-10 2003-02-18 Coatex S.A.S. Water-retaining and optical-brightener-activating polymer composition, paper coating colors and sheets of coated paper thus obtained
WO2002044471A1 (en) * 2000-11-24 2002-06-06 Metso Paper, Inc. Method for coating paper
US8455423B2 (en) 2005-05-27 2013-06-04 Conopco, Inc. Process of bleaching
US8722608B2 (en) 2005-05-27 2014-05-13 Conopco, Inc. Process of bleaching
US7972386B2 (en) 2005-10-12 2011-07-05 Conopco, Inc. Bleaching of substrates
WO2007069037A1 (fr) 2005-12-16 2007-06-21 Coatex S.A.S. Procede de fabrication de sauces de couchage a la retention d'eau et a la viscosite brookfieldtm ameliorees mettant en oeuvre un polymere peigne avec au moins une fonction greffee oxyde de polyalkylene
US7976582B2 (en) 2007-01-16 2011-07-12 Conopco, Inc. Bleaching of substrates
EP2075374A1 (de) 2007-12-17 2009-07-01 Omya Development AG Verfahren zur Herstellung einer Streichmasse unter Einbringung eines acrylischen Verdickers mit verzweigter wasserabweisender Kettenstruktur und so erhaltene Streichmasse
US8563643B2 (en) 2007-12-17 2013-10-22 Omya International Ag Method for manufacturing a coating slip, using an acrylic thickener with a branched hydrophobic chain, and the slip obtained
US9469666B2 (en) 2010-03-03 2016-10-18 Catexel Limited Preparation of bleaching catalysts

Also Published As

Publication number Publication date
FI110386B (fi) 2003-01-15
FI921674A0 (fi) 1992-04-14
BR9201346A (pt) 1992-12-01
ATE167909T1 (de) 1998-07-15
ES2121831T3 (es) 1998-12-16
US5563201A (en) 1996-10-08
FR2675165A1 (fr) 1992-10-16
FI921674A (fi) 1992-10-16
FR2675165B1 (fr) 1993-08-06
EP0509878B1 (de) 1998-07-01

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