EP1809711A1 - Composition pigmentaire sous forme de dispersion aqueuse - Google Patents

Composition pigmentaire sous forme de dispersion aqueuse

Info

Publication number
EP1809711A1
EP1809711A1 EP05793349A EP05793349A EP1809711A1 EP 1809711 A1 EP1809711 A1 EP 1809711A1 EP 05793349 A EP05793349 A EP 05793349A EP 05793349 A EP05793349 A EP 05793349A EP 1809711 A1 EP1809711 A1 EP 1809711A1
Authority
EP
European Patent Office
Prior art keywords
composition
particles
silica
pigment
paper
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Withdrawn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
EP05793349A
Other languages
German (de)
English (en)
Inventor
Kjell Rune Andersson
Joakim Carlen
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 EP05793349A priority Critical patent/EP1809711A1/fr
Publication of EP1809711A1 publication Critical patent/EP1809711A1/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Withdrawn legal-status Critical Current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 pigment composition and a process for its production, use thereof, a process for coating paper or paper board and paper or paper board obtainable by the process.
  • 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.
  • one aspect of the invention concerns a pigment composition in the form of an aqueous dispersion comprising:
  • the pigment particles of synthetic amorphous 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 30 m 2 /g to about 600 m 2 /g, more preferably from about 30 to about 450 m 2 /g, most preferably 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.
  • the term diameter as used herein refers to the equivalent spherical diameter.
  • the pigment particles of synthetic amorphous silica or aluminosilicate may, for example, be precipitated silica, gel-type silica, fumed silica, 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 one or more of the above kinds of particles.
  • Precipitated silica refers to silica formed when ultimate silica particles in an aqueous medium are coagulated as loose aggregates, recovered, washed, and dried. Precipitated silica is commercially available, for example under the trademark TixosilTM.
  • Gel-type silica refers to particles formed from a silica gel (usually described as a coherent, rigid three-dimensional network of contiguous particles of colloidal silica).
  • Gel- type silica is commercially available, for example under the trademark SylojetTM.
  • Fumed silica refers to silica prepared by a flame hydrolysis method. Fumed silica is commercially available, for example under the trademarks CabosilTM and AerosilTM.
  • 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 600 m 2 /g, more preferably from about 30 to about 450 m 2 /g, most preferably 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 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.
  • a sol formed by dispersing a powder of e.g. precipitated silica, gel-type silica or fumed silica 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 or gel-type 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. Her, "The Chemistry of Silica” 1979, pages 364-407.
  • the degree of aggregation can be followed by measuring the viscosity and applying the Einstein and Mooney equations (see e.g. R.K. Her, "The Chemistry of Silica” 1979, pages 360-364).
  • 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.
  • CMC carboxymethyl cellulose
  • PAM polyacrylamides
  • polyDADMAC poly diallyl dimethyl ammoniumchloride
  • polyallyl amines polyamines
  • starch 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.
  • the pigment particles of synthetic amorphous silica or aluminosilicate is a mixture of colloidal particles in a sol prepared from alkali metal silicate by ion exchange or pH-reduction, optionally partially or fully aggregated, with particles of one or more of precipitated silica, gel-type silica or fumed silica.
  • the water soluble aluminium salt 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 O 3 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.
  • the pigment composition may also comprise additional aluminium salt.
  • the cationic polymer 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 30 wt%, more preferably from about 0.5 wt% to about 20 wt%, most preferably from about 1 wt% to about 15 wt%, based on the amount of dry pigment particles.
  • Suitable cationic polymers include synthetic 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.
  • the composition further comprises other kinds of pigment particles such as kaolinites, smectites, talcites, calcium carbonate minerals, precipitated calcium carbonate, and mixtures thereof.
  • the content of synthetic amorphous silica or aluminosilicate particles is preferable from about 10 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 synthetic amorphous silica or aluminosilicate 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 a coating binder suitable for paper coating, preferably in an amount 0 to about 70 wt%, most preferably from 0 to about 50 wt%, based on total amount of pigment particles.
  • binders conventionally used in paper coating are polyvinyl alcohols, optionally modified starches, gums, protein binders (e.g. caseins and soy protein binders), latices and mixtures thereof. Latices can be based on styrene butadien, acrylates, vinyl acetate, co-polymers of ethylene and vinyl acetates, styrene acrylic esters etc. If one or more binders are included, polyvinyl alcohols are particularly preferred.
  • 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 (apart from optional binders) 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. It has been found that a composition comprising pigment particles of optionally aggregated primary particles of silica or aluminosilicate with a low surface area, preferably below 450 m 2 /g, and prepared from alkali metal silicate by ion exchange or pH- reduction as earlier described, satisfactory results can be obtained by coating paper or paperboard with a pigment composition comprising no or only low amounts of a binder as mentioned above, for example less than about 3 wt%, preferably less than about 2 wt% on dry pigment, most preferably less than about 1 wt% binder of the total amount of pigment particles.
  • the invention further relates to a process for the production of a pigment composition as described above comprising mixing particles of synthetic amorphous silica or aluminosilicate, a water soluble aluminium salt and 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 12 meq/g to an aqueous dispersion in a way so substantial gelling or precipitation is avoided.
  • This can be achieved by several alternative process embodiments.
  • One alternative process embodiment comprises a step of adding particles of synthetic amorphous silica or aluminosilicate 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 or binders may be added at any stage in the form of solids, liquids or dispersions.
  • the silica or aluminium silicate particles may be in the form of a solid powder or 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 particles of synthetic amorphous silica or aluminosilicate to an aqueous solution of a cationic polymer as described above followed by adding a water soluble aluminium salt.
  • Other components such as other pigment particles or binders may be added at any stage in the form of solids, liquids or dispersions.
  • the silica or aluminium silicate particles may be in the form of a solid powder or 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 or binders may be added at any stage in the form of solids, liquids or dispersions. Regarding suitable and preferred amounts and kinds of the components, the above description of the pigment composition is referred to.
  • the invention also concerns the use of a pigment composition as described above for coating paper or paper board.
  • the invention further concerns a process for the production of coated paper or paperboard comprising a step of applying a pigment composition as described above as a coating to at least one side of a paper or paperboard web.
  • the coating is preferably applied in an amount sufficient to yield from about 0.4 g/m 2 to about 40 g/m 2 , more 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 of pigment particles of synthetic amorphous silica or aluminosilicate and optionally other pigment particles from the pigment composition per coated side of the paper or paper board web.
  • the dry amount of coating applied per coated side of the paper or paper board is preferably from about 0.7 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 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 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 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 softwood bleached or un
  • the invention finally 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 0.7 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.
  • 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. It is a particular advantage that such good properties can be obtained in a simple manner by applying only small amounts of the coating and without the need to apply numerous different coating layers on the paper or paper board. This also enable the coating to be applied with a size press, such as a film press, which for practical reasons is advantageous. Furthermore, the main components of the pigment composition can be made from readily available raw materials.
  • Example 1 Three coating formulations with a gel-type silica pigment, SylojetTM
  • P612 from Grace Davison were prepared. In all three formulations a polyvinyl alcohol binder (ERKOLTM 26/88 from ACETEX Co., Spain) was used as the binder. The polyvinyl alcohol (PVA) was dissolved in water at 9O 0 C to a concentration of 10 wt% and was added in an amount to give 20 parts binder (dry) to 100 parts silica pigment (dry). The total content of pigment particles in the three coating formulations were 20 wt%.
  • ERKOLTM 26/88 from ACETEX Co., Spain
  • LocronTM was diluted with 3.5 g water and SylojetTM-PVA slurry was mixed with the
  • the three coating formulations 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. After the coating the paper was dried with an IR-dryer (Hedson Technologies AB, Sweden). The dried sheets of papers were evaluated on two inkjet printers, HP DeskjetTM 5850 from Hewlett-Packard and Epson StylusTM C86 from Epson.
  • the print results were 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:
  • coating formulation C gave the best over-all colour gamut.
  • a visual judgement also revealed good line sharpness and no tendency of colour mottling.
  • Example 2 In these formulation pigment blends with equal parts (dry/dry) of the gel-type silica used was SylojetTM P612 (same as in Example 1) and an anionic silica sol, NyacolTM 9950 from Eka Chemicals, a 50 wt% sol with a mean particle size of 100 nm. As binder the same amount and the same kind of PVA as in Example 1 was used. Two coating formulations with a total pigment content of 20 wt% were prepared. A) 5 g dry silica gel (SylojetTM P612) was dispersed in solution containing 10 g NyacolTM 9950., 20 g 10 wt% PVA and 15 g water under UltraTurraxTM mixing (lO OOOrpm).
  • Example 2 Following the same procedure as in Example 1 , the coatings were applied to paper and dried and evaluated on two printers. The results are shown in the table below:
  • coating formulation B gave better print quality on both the printers.
  • 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. A) BindzilTM 50/80 diluted to 30 wt%. B) 6 g LocronTM was diluted with 20 g water and 60 g of BindzilTM 50/80 was added under vigorous mixing (UltraTurraxTM). The mixing continued during the addition of 3 g polyDADMAC (same as in example 1) and 11 g water. The final concentration of silica became 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 two printers. The results are shown in the table below:
  • Epson, formulation B was significantly better on HP and therefore can be considered as giving best over-all result. A visual judgement also revealed good line sharpness and no tendency of colour mottling.
  • 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 (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%.
  • 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 two printers. The results are shown in the table below:
  • coating formulation D containing both an aluminium salt and a cationic low-molecular polymer, gave best results on both the printers.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Polymers & Plastics (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)
  • Ink Jet (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne une composition de pigment sous forme de dispersion aqueuse qui comprend: (a) des particules de pigment en silice synthétique amorphe ou aluminosilicate; (b) au moins un sel d'aluminium hydrosoluble; et (c) au moins un polymère cationique de poids moléculaire compris entre environ 2 000 et environ 1 000 000 et de densité de charge comprise entre environ 0,2 et environ 12 meq/g. On décrit aussi un procédé pour la fabrication de cette composition, l'utilisation correspondante de la composition telle que décrite, et enfin un procédé de revêtement de papier ou de carton, et du papier ou du carton ainsi revêtu.
EP05793349A 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse Withdrawn EP1809711A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05793349A EP1809711A1 (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
PCT/SE2005/001523 WO2006049546A1 (fr) 2004-11-08 2005-10-13 Composition de pigment sous forme de dispersion aqueuse
EP05793349A EP1809711A1 (fr) 2004-11-08 2005-10-13 Composition pigmentaire sous forme de dispersion aqueuse

Publications (1)

Publication Number Publication Date
EP1809711A1 true EP1809711A1 (fr) 2007-07-25

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

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Country Status (16)

Country Link
EP (3) EP1809712A1 (fr)
JP (3) JP4897694B2 (fr)
KR (3) KR100948121B1 (fr)
CN (3) CN101426865B (fr)
AR (3) AR051614A1 (fr)
AU (3) AU2005301349B2 (fr)
BR (3) BRPI0517258A (fr)
CA (3) CA2586207C (fr)
MX (3) MX2007004959A (fr)
MY (3) MY145836A (fr)
NO (3) NO20072909L (fr)
NZ (1) NZ554297A (fr)
RU (3) RU2392223C2 (fr)
TW (3) TWI298081B (fr)
WO (3) WO2006049546A1 (fr)
ZA (3) ZA200704420B (fr)

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US8758886B2 (en) 2005-10-14 2014-06-24 International Paper Company Recording sheet with improved image dry time
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