EP1809712A1 - Composition pigmentaire sous forme de dispersion aqueuse - Google Patents

Composition pigmentaire sous forme de dispersion aqueuse

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Publication number
EP1809712A1
EP1809712A1 EP05794244A EP05794244A EP1809712A1 EP 1809712 A1 EP1809712 A1 EP 1809712A1 EP 05794244 A EP05794244 A EP 05794244A EP 05794244 A EP05794244 A EP 05794244A EP 1809712 A1 EP1809712 A1 EP 1809712A1
Authority
EP
European Patent Office
Prior art keywords
pigment
paper
particles
silica
meq
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.)
Withdrawn
Application number
EP05794244A
Other languages
German (de)
English (en)
Inventor
Kjell Rune Andersson
Joakim CARLÉN
Erik Lindgren
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.)
Akzo Nobel NV
Nouryon Pulp and Performance Chemicals AB
Original Assignee
Akzo Nobel NV
Eka Chemicals AB
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 Akzo Nobel NV, Eka Chemicals AB filed Critical Akzo Nobel NV
Priority to EP05794244A priority Critical patent/EP1809712A1/fr
Publication of EP1809712A1 publication Critical patent/EP1809712A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • C09D17/004—Pigment pastes, e.g. for mixing in paints containing an inorganic pigment
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D17/00—Pigment pastes, e.g. for mixing in paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds

Definitions

  • the present invention relates to a process for the production of coated paper or paperboard pigment, paper or paper board obtainable by the process, a novel pigment composition useful therefore and a process for its production.
  • the development of ink-jet printers has led to a demand for paper that is suitable for that purpose. Particularly, there is a demand for paper that is simple to produce but still enables ink-jet printing of high quality.
  • US Patent 4554181 discloses a recording surface including a combination of a water soluble polyvalent metal and a cationic polymer.
  • US Patent Application Publication 2004/0255820 discloses a pigment that is surface treated with a water-soluble polyvalent metal salt.
  • US Patent Application Publication 2005/0106317 discloses a method for preparing an ink-jet recording material comprising the steps of forming at least one porous layer containing silica particles with an average secondary particle size of 500 nm or less, and coating a coating solution for preparing an inorganic particles-containing layer so that a solid content of the coated inorganic particles became 0.33 g/m 2 or less on the porous layer.
  • US Patent 6797347 discloses an ink-jet paper comprising a base paper and a coating thereon, wherein said coating contains an inorganic pigment modified with a positively charged complex and a binder.
  • the positively charged complex contains a polyvalent metal ion and an organic ligand.
  • US Patent Application Publication 2003/0099816 discloses an ink jet-recording material comprising a substrate and a transparent ink-receiving layer comprising a binder and a plurality of particles formed by dispersing amorphous silica particles and applying a strong mechanical stress to divide the particles.
  • the present invention concerns a process for the production of coated paper or paperboard comprising a step of applying a pigment composition as a coating to at least one side of a paper or paperboard web, said pigment composition being an aqueous dispersion comprising as pigment particles optionally aggregated colloidal particles of silica or aluminosilicate prepared from alkali metal silicate by ion exchange or pH-reduction and having a surface area from about 30 m 2 /g to about 450 m 2 /g, and at least one cationic component selected from the group consisting of water soluble aluminium salts and cationic polymers with a molecular weight from about 2000 to about 1000000 and a charge density from about 0.2 meq/g to about 12 meq/g, wherein at least about 0.4 g pigment particles from the pigment composition are applied per m 2 coated side of the paper or paper board web.
  • a pigment composition being an aqueous dispersion comprising as pigment particles optionally aggregated colloidal particles of silica or alum
  • the pigment composition applied to the paper or paper board is substantially free from or comprises, based on the total amount of pigment particles, less than about 3 wt%, preferably less than about 2 wt%, most preferably less than about 1 wt% of organic coating binders.
  • binders include polyvinyl alcohols, optionally modified starches, gums, protein binders (e.g. caseins and soy protein binders), latices and mixtures thereof.
  • Latices can, for example, be based on styrene butadien, acrylates, vinyl acetate, co ⁇ polymers of ethylene and vinyl acetates, styrene acrylic esters etc.
  • the pigment particles of optionally aggregated colloidal particles of silica or aluminosilicate preferably have a mean diameter from about 0.005 ⁇ m to about 25 ⁇ m, more preferably from about 0.007 ⁇ m to about 15 ⁇ m, most preferably from about 0.01 ⁇ m to about 10 ⁇ m.
  • the particles preferably have a surface area from about 40 m 2 /g to about 400 m 2 /g particularly most preferably from about 50 m 2 /g to about 300 m 2 /g.
  • the net surface charge of the pigment particles in the composition is preferably positive, the dispersion thus being regarded as predominantly cationic.
  • Preferred pigment particles are colloidal primary particles of silica, aluminosilicate or a mixture thereof, or porous aggregates formed by aggregation of colloidal primary particles of silica, aluminosilicate or a mixture thereof in an aqueous sol, or a mixture of the above kinds of particles.
  • Colloidal primary particles of silica or aluminosilicate have preferably been formed from an aqueous solution of alkali metal silicate where alkali metal ions are removed through an ion exchange process or where the pH of the alkali metal silicate solution has been reduced by the addition of an acid.
  • a process based on ion exchange follows the basic principles described in R.K. Her, "The Chemistry of Silica” 1979, pages 333-334 and results in an aqueous sol comprising colloidal negatively or positively charged particles of silica or aluminosilicate.
  • a process based on pH-reduction of alkali metal silicate follows the basic principles described in e.g. US patents 5176891 , 5648055, 5853616, 5482693, 6060523 and 6274112.
  • sols comprise colloidal primary particles of silica that may or may not be surface modified, for example with a metal oxide such as oxide of aluminium, titanium, chromium, zirconium, boron or any other suitable metal.
  • a metal oxide such as oxide of aluminium, titanium, chromium, zirconium, boron or any other suitable metal.
  • the surface area of the primary particles is from about 30 m 2 /g to about 450 m 2 /g, preferably from about 40 m 2 /g to about 400 m 2 /g most preferably from about 50 m 2 /g to about 300 m 2 /g.
  • the dry content of the aqueous sol of primary particles is preferably from about 0.5 wt% to about 60 wt%, most preferably from about 1 wt% to about 50 wt%.
  • Suitable aqueous sols of colloidal primary particles of silica or aluminosilicate are commercially available, for example under the trademarks LudoxTM, SnowtexTM, BindzilTM, NyacolTM, VinnsilTM or FennosilTM.
  • the colloidal particles in a sol prepared from alkali metal silicate by ion exchange or pH-reduction have never been dried to a powder, such as in the case for e.g. precipitated silica, gel-type silica or fumed silica.
  • the mean particle diameter of these primary particles is preferably from about 5 nm to about 125 nm, most preferably from about 7 nm to about 100 nm.
  • the colloidal primary particles are preferably in the form of an aqueous sol as described above.
  • Aggregation of primary particles in a sol to form a dispersion of porous aggregates may be performed with any suitable method, such as those described in R.K.
  • the aggregation may be performed as a separate step or in a mixture also comprising other pigment particles.
  • an anionic sol comprising negatively charged colloidal primary particles
  • a cationic sol comprising positively charged colloidal primary particles
  • a salt preferably selected from divalent, multivalent or complex salts, is added to an anionic or cationic sol also resulting in the formation of porous aggregates.
  • salts are aluminium chloride, poly aluminium chloride, poly aluminium silicate sulfate, aluminium sulfate, zirconium carbonates, zirconium acetates, alkali metal borates, and mixtures thereof.
  • a bridging substance is used to form the aggregates from the primary particles.
  • suitable bridging substances are synthetic and natural polyelectrolytes such as CMC (carboxymethyl cellulose), PAM (polyacrylamides), polyDADMAC (poly diallyl dimethyl ammoniumchloride), polyallyl amines, polyamines, starch, guar gums, and mixtures thereof.
  • Each porous aggregate is formed from at least three primary particles, which inherently gives at least some pores.
  • the mean particle diameter of the aggregates is preferably from about 0.03 to about 25 ⁇ m, more preferably from about 0.05 to about 10 ⁇ m, most preferably from about 0.1 ⁇ m to about 5 ⁇ m. It is to be understood that the average diameter of the porous aggregates is always larger than the average diameter of the primary particles they are formed from.
  • the surface area of the aggregates is usually essentially the same as of the primary particles.
  • a water soluble aluminium salt as cationic component in the pigment composition can be any aluminium containing salt and is preferably present in an amount from about 0.1 wt% to about 30 wt% most preferably from about 0.2 wt% to about 15 wt%, calculated as wt% AI 2 O3 on dry pigment particles.
  • salts include aluminium chloride, poly aluminium chloride, poly aluminium silicate sulfate, aluminium sulfate, zirconium carbonates, zirconium acetates , and mixtures thereof.
  • the aluminium may be present partly or fully on the surface of the particles of silica or aluminosilicate or in the aqueous phase.
  • the entire content of water soluble aluminium salt may originate from what is present in a cationic aluminium modified silica sol used for preparing the pigment composition, it thus being possible to use a pigment composition consisting essentially of a cationic silica sol as a coating.
  • the pigment composition may also comprise additional aluminium salt.
  • a cationic polymer as cationic component in the pigment composition has a molecular weight from about 2000 to about 1000000, preferably from about 2000 to about 500000, most preferably from about 5000 to about 200000.
  • the charge density is from about 0.2 meq/g to about 12 meq/g, preferably from about 0.3 meq/g to about 10 meq/g, most preferably from about 0.5 meq/g to about 8 meq/g.
  • the cationic polymer is preferably present in the pigment dispersion in an amount from about 0.1 wt% to about
  • cationic polymers include syntetic and natural polyelectrolytes such as PAM (polyacrylamides), polyDADMAC (poly diallyl dimethyl ammoniumchloride), polyallyl amines, polyamines, polysaccharides and mixtures thereof, provided that the molecular weight and charged density fulfil the above requirements.
  • the cationic polymer may be present partly or fully on the surface of the particles of silica or aluminosilicate or in the aqueous phase.
  • a preferred pigment composition comprises both at least one water soluble aluminium salt as described above and at least one cationic polymer as described above.
  • the composition further comprises other kinds of pigment particles such as kaolinites, smectites, talcites, calcium carbonate minerals, precipitated calcium carbonate, precipitated silica, gel-type silica, fumed silica, and mixtures thereof.
  • the content of optionally aggregated colloidal particles of silica or aluminosilicate prepared from alkali metal silicate by ion exchange or pH-reduction and having a surface area from about 30 m 2 /g to about 450 m 2 /g is preferable from about 10 wt% to 100 wt%, most preferable from about 30 wt% to 100 wt% of the total amount of pigment particles.
  • the total content of pigment particles of optionally aggregated colloidal silica or aluminosilicate as described above and optional other pigment particles in the composition is preferably from about 1 wt% to about 60 wt%, most preferably from about 5 wt% to about 50 wt%, particularly most preferably from about 10 wt% to about 50 wt%.
  • the pigment composition may also comprise other additives commonly used for paper coating such as stabilisers, rheology modifiers, optical brighteners, lubricants, insolubilizers, dyes, sizing agents etc, as well as various impurities from the raw materials.
  • the dry content of the pigment composition is preferably from about 2 wt% to about 75 wt%, most preferably from about 10 wt% to about 70 wt%.
  • the total amount of other additives and possible impurities is preferably from 0 to about 50 wt%, most preferably from 0 to about 30 wt%, based on the dry content.
  • a pigment composition as described above is preferably storage stable for at least one week, most preferably at least one month.
  • the composition may be used directly for coating paper or paperboard or form an intermediate product for preparing a coating composition.
  • the coating is preferably applied in an amount sufficient to yield from about 0.5 g/m 2 to about 40 g/m 2 , most preferably from about 1 g/m 2 to about 20 g/m 2 of optionally aggregated colloidal particles of silica or aluminosilicate with a surface area from about 30 g/m 2 to about 450 g/m 2 and optionally other pigment particles from the pigment composition per coated side of the paper or paper board.
  • the dry amount of coating applied per coated side of the paper or paper board is preferably from about 0.5 g/m 2 to about 50 g/m 2 , most preferably from about 1 g/m 2 to about 25 g/m 2 .
  • the coating is preferably applied to a non-coated side of the paper or paper board but may also be applied on top of a previously applied coating layer with the same or another coating composition. It is preferred not to apply any further coating of other kind on top of the layer formed from the coating as described herein.
  • Applying the coating can be performed either on the paper or board machine or off the paper or board machine. In either case any type of coating methods can be used. Examples of coating methods are blade coating, air knife coating, roll coating, curtain coating, spray coating, size press coating (e.g. film press coating) and cast coating.
  • the paper After applying the coating the paper is dried, which in the case of on machine coating preferably is accomplished in a drying section of the machine. Any means of drying may be used, such as infra red radiation, hot air, heated cylinders or any combination thereof.
  • coating refers to any method in which pigments are applied to the surface of paper or paper board, thus including not only conventional coating but also other methods such as for example pigmenting.
  • the paper and paper board to be coated can be made from any kind of pulp, such as chemical pulp like sulfate, sulfite and organosolve pulps, mechanical pulp like thermo-mechanical pulp (TMP), chemo-thermo-mechanical pulp (CTMP), refiner pulp or ground wood pulp, from both hardwood and softwood bleached or unbleached pulp that is based on based on virgin or recycled fibres or any combination thereof. Paper and paper board from any other kind of pulp may also be coated in accordance with the invention.
  • pulp such as chemical pulp like sulfate, sulfite and organosolve pulps, mechanical pulp like thermo-mechanical pulp (TMP), chemo-thermo-mechanical pulp (CTMP), refiner pulp or ground wood pulp, from both hardwood and softwood bleached or unbleached pulp that is based on based on virgin or recycled fibres or any combination thereof.
  • TMP thermo-mechanical pulp
  • CMP chemo-thermo-mechanical pulp
  • refiner pulp or ground wood pulp from both hardwood and soft
  • the invention further concerns paper or paper board suitable for ink-jet printing obtainable by a process as described above.
  • Such paper or paper board comprises a substantially transparent or substantially non-transparent layer comprising pigment particles of synthetic amorphous silica or aluminosilicate and optionally other pigment particles from the coating composition, the pigment particles preferably forming a nano- structure.
  • the dry amount of coating is preferably from about 0.5 g/m 2 to about 50 g/m 2 , most preferably from about 1.0 g/m 2 to about 25 g/m 2 .
  • the amount of pigment particles from the above described pigment composition per coated side of the paper or paper board is preferably from about 0.5 g/m 2 to about 40 g/m 2 , most preferably from about 1 g/m 2 to about 20 g/m 2 . Preferably no other kind of coating has been applied on top of this layer. It has been found that the paper or paper board of the invention have particularly good properties for ink-jet printing, giving low line blurriness and mottling and high printing density for colours, but can advantageously also be used for other kinds of printing processes like toner, flexography, letter press, gravure, offset lithography and screen printing.
  • An aspect of the invention thus also concerns a pigment composition in the form of an aqueous dispersion as pigment particles optionally aggregated colloidal particles of silica or aluminosilicate prepared from alkali metal silicate by ion exchange or pH-reduction and having a surface area from about 30 m 2 /g to about 450 m 2 /g, and at least one cationic polymer having a molecular weight from about 2000 to about 1000000 and a charge density from about 0.2 meq/g to about 12 meq/g, said composition being substantially free from or comprising, based on the total amount of pigment particles, less than about 3 wt%, preferably less than about 2 wt%, most preferably less than about 1 wt% of organic coating binders.
  • the composition also comprises a water soluble aluminium salt.
  • Organic coating binders include polyvinyl alcohols, optionally modified starches, gums, protein binders (e.g. caseins and soy protein binders), latices and mixtures thereof.
  • Latices can, for example, be based on styrene butadien, acrylates, vinyl acetate, co ⁇ polymers of ethylene and vinyl acetates, styrene acrylic esters etc.
  • suitable and preferred amounts and kinds of the components the above description of the pigment composition in connection with the process for the production of coated paper or paperboard is referred to.
  • the invention further relates to a process for the production of a pigment composition as described above comprising mixing a sol of optionally aggregated colloidal particles of silica or aluminosilicate prepared from alkali metal silicate by ion exchange or pH-reduction and having a surface area from about 30 m 2 /g to about 450 m 2 /g with a cationic polymer having a molecular weight from about 2000 to about 1000000 and a charge density from about 0.2 meq/g to about 12meq/g and optionally a water soluble aluminium salt to an aqueous dispersion in a way so substantial gelling or precipitation is avoided.
  • a sol of optionally aggregated colloidal particles of silica or aluminosilicate prepared from alkali metal silicate by ion exchange or pH-reduction and having a surface area from about 30 m 2 /g to about 450 m 2 /g with a cationic polymer having a molecular weight from about 2000 to about 1000
  • One alternative process embodiment comprises a step of adding a sol of colloidal particles of silica or aluminosilicate having a surface area from about 30 m 2 /g to about 450 m 2 /g to an aqueous solution of a water soluble aluminium salt, followed by adding a cationic polymer as described above.
  • Other components such as other pigment particles may be added at any stage in the form of solids, liquids or dispersions.
  • the silica or aluminium silicate particles are preferably in the form of an aqueous sol of colloidal particles, that may be anionic or cationic. Unless a cationic sol is used, the aluminium salt is preferably in such an excess that it is sufficient for rendering the resulting dispersion predominantly cationic. At least if an anionic sol is used, there may be at least some aggregation of the colloidal particles.
  • Another alternative process comprises a step of adding a sol of colloidal particles of silica or aluminosilicate having a surface area from about 30 m 2 /g to about 450 m 2 /g to an aqueous solution of a cationic polymer as described above, optionally followed by adding a water soluble aluminium salt.
  • Other components such as other pigment particles may be added at any stage in the form of solids, liquids or dispersions.
  • the silica or aluminium silicate particles are preferably in the form of an aqueous sol of colloidal particles, that may be anionic or cationic. Unless a cationic sol is used, the cationic polymer is preferably in such an excess that it is sufficient for rendering the resulting dispersion predominantly cationic. At least if an anionic sol is used, there may be at least some aggregation of the colloidal particles.
  • Still another process embodiment comprises a step of mixing a cationic aluminium modified aqueous sol of colloidal silica or aluminosilicate with a cationic polymer.
  • a cationic aluminium modified aqueous sol of colloidal silica or aluminosilicate with a cationic polymer.
  • Other components such as other pigment particles may be added at any stage in the form of solids, liquids or dispersions.
  • the above description of the pigment composition is referred to.
  • Example 1 Three pigment compositions were prepared.
  • BindzilTM CAT from Eka Chemicals, a silica sol cationised by incorporation of a polyaluminium salt, having a surface area of about 500 m 2 /g and a concentration of 15 wt% SiO2, used as is in the coating.
  • BindzilTM CAT 80 from Eka Chemicals a silica sol cationised by incorporation of a polyaluminium salt, having a surface area of about 80 m 2 /g and a concentration of 40 wt% SiO2, was diluted to a concentration of 15 wt% SiO2 prior to the coating application.
  • the three pigment compositions were applied on surface of an uncoated copy paper (A4 sized Data Copy from M-real) by a drawdown method with a wired rod as commonly used in laboratory coating tests. No organic coating binder was added. After the coating the paper was dried with an IR-dryer (Hedson Technologies AB, Sweden). The dried sheets of papers were evaluated on three inkjet printers, HP DeskjetTM 5850 from Hewlett-Packard, Epson StylusTM C86 from Epson and Canon iP 4000.
  • the print result was evaluated using a print picture with seven colour blocs, cyan, magenta, yellow, red, green, blue and black.
  • the printed blocs and the unprinted paper were measured with a spectrophotometer (Color Touch 2 from Technidyne) and the colour gamut volume was calculated.
  • the gamut volume is approximated with a dodecahedral in the CEI L*a*b* colour space and the measurements of the colours give the corners in the dodecahedral (see "Rydefalk Staffan, Wedin Michael; Litterature review on the colour Gamut in the Printing Process-Fundamentals, PTF-report no 32, May 1997").
  • the results are shown in the table below:
  • Example 2 In this example five pigment composition were evaluated.
  • a 15 wt% pigment slurry was prepared by dispersing a kaolin coating clay (SPSTM, Imerys, UK) in water by using intensive mixing in an UltraTurraxTM.
  • SPSTM kaolin coating clay
  • a 15 wt% pigment slurry was prepared by dispersing a gel-type silica, SylojetTM P612 from Grace Davison in water by using intensive mixing in an UltraTurraxTM.
  • BindzilTM 50/80 from Eka Chemicals, an anionic silica sol with a concentration of 50 wt% (SiO2) and a surface area of 80 m 2 /g, was mixed with 15 g of kaolin coating clay (SPSTM) and 55 g water in an UltraTurraxTM. Before use the composition was further diluted to 15 wt% pigment concentration.
  • SPSTM kaolin coating clay
  • BindzilTM 50/80 15 g of kaolin coating clay (SPSTM) and 31 g water were mixed in an UltraTurraxTM and transferred into a solution containing 6 g of aluminium chlorohydrate ( LocronTM from Clariant, 25 wt% AI 2 O 3 ) and 18 g water under vigorous stirring (UltraTurraxTM).
  • the resulting composition had a pigment concentration of 30 % and was then further diluted to 15 wt%.
  • BindzilTM 50/80 15 g of kaolin coating clay (SPSTM) and 31 g water were mixed in an UltraTurraxTMand transferred into a solution containing 3 g of polyDADMAC ( 40 wt%, average molecular weight of about 20 000 and cationic charge density of 7.2 meq/g) and 21 g water under vigorous stirring (UltraTurraxTM).
  • the resulting composition had a pigment concentration of 30 wt% and was then further diluted to15 wt%.
  • compositions G and H containing a cationic component gave an over ⁇ all better print quality compared to F being a sole blend of silica sol and clay.
  • composition E being a gel-type silica, gave the highest gamut volume, it was, however, noted that the coated layer on this paper as well as the clay coating m from D were very poorly adhered to the paper surface. This resulted in extensive chalking when touching the coated surfaces with the finger tips. It was therefore evident that these two pigment compositions could not give a paper useful for printing unless combined with a coating binder.
  • a dusting test on the non printed coated papers were also conducted.
  • a strip of a low-tack tape, 5 x15 cm was pressed for 1 minute on the coated paper surface and thereafter removed from the paper.
  • the tape was weighted before and after the contact with the paper surface and the weight difference gives the amount of dust removed from the coated layer.
  • compositions C and G had much lower tendency to dust compared to paper with the conventional pigments D and E when no organic binder coating binder was used.
  • Example 3 In the test an anionic silica sol, BindzilTM 50/80 from Eka Chemicals was used as pigment, a 50 wt% sol with a mean particle size of 40 nm. Two formulations were prepared without any PVA-binder. I) BindzilTM 50/80 diluted to 30 wt%.
  • Example 2 Following the same procedure as in Example 1, the coatings were applied to paper and dried (coat weight 8-9 g/m 2 ) and evaluated on the Epson and HP-printers. The results are shown in the table below:
  • Example 4 Four coating formulations were prepared. A pigment composition of equal parts (dry/dry) of anionic silica sol, BindzilTM 50/80 and kaolin a coating clay (SPSTM, Imerys, UK) were used in all formulations. As in Example 3 no external binder such as PVA was used in any of the formulations.
  • BindzilTM 50/80, SPSTM clay and water were mixed in UltraTurraxTM to a pigment concentration of 30 wt%.
  • polyDADMAC 3 g polyDADMAC (same as in example 1 ) was diluted with water and added to a pigment slurry containing 15 g of BindzilTM (as dry) and 15 g SPSTM clay under Ultra- TurraxTM mixing to a pigment solids of 30 wt %.
  • a pigment slurry was mixed with LocronTM solution as in A.
  • the UltraTurrax mixing continued and 3 g polyDADMAC (same as in Example 1) was diluted with water and ' added to a Locron treated pigment slurry to obtain a final pigment content of 30 wt%.
  • compositions containing an aluminium salt or/and a low cationic molecular weight polymer L 1 M and N.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Materials Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Polymers & Plastics (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Paper (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Ink Jet Recording Methods And Recording Media Thereof (AREA)
  • Paints Or Removers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention concerne un processus de production de papier couché ou de carton comprenant une étape d'application d'une composition pigmentaire sous forme de revêtement sur au moins un côté de la bande de papier ou de carton, cette composition pigmentaire pouvant être une dispersion aqueuse comprenant comme particules pigmentaires des particules colloïdales éventuellement agrégées de silice ou d'aluminosilicates préparés à partir de silicate métallique alcalin par échange d'ions ou par réduction de pH et possédant une zone de surface comprise entre environ 30 m2/g et environ 450 m2/g, et au moins un composant cationique sélectionné dans le groupe constitué de sels d'aluminium soluble dans l'eau et polymères cationiques avec une masse moléculaire comprise entre environ 2000 et environ un million et une densité de charge comprises entre environ 0.2 meq/g et environ 12 meq/g, au moins environ 0,4 g de particules pigmentaires issues de la composition pigmentaire étant appliquées par mètre carré de côté revêtu de cette bande de papier ou de carton. Cette invention concerne aussi un papier ou à carton qu'on peut obtenir par ce processus, une nouvelle composition pigmentaire qui convient pour ceux-ci et un processus de production de cette composition.
EP05794244A 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse Withdrawn EP1809712A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05794244A EP1809712A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04105595 2004-11-08
EP05794244A EP1809712A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse
PCT/SE2005/001524 WO2006049547A1 (fr) 2004-11-08 2005-10-13 Processus de production de papier couche

Publications (1)

Publication Number Publication Date
EP1809712A1 true EP1809712A1 (fr) 2007-07-25

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Family Applications (3)

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EP05793317A Withdrawn EP1809710A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse
EP05793349A Withdrawn EP1809711A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse
EP05794244A Withdrawn EP1809712A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse

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EP05793349A Withdrawn EP1809711A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse

Country Status (16)

Country Link
EP (3) EP1809710A1 (fr)
JP (3) JP5159312B2 (fr)
KR (3) KR100948121B1 (fr)
CN (3) CN101056956B (fr)
AR (3) AR055816A1 (fr)
AU (3) AU2005301350B2 (fr)
BR (3) BRPI0517264A (fr)
CA (3) CA2586202C (fr)
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