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WO2001000713A1 - Pigment polymere applicable a sec - Google Patents

Pigment polymere applicable a sec Download PDF

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Publication number
WO2001000713A1
WO2001000713A1 PCT/FI2000/000564 FI0000564W WO0100713A1 WO 2001000713 A1 WO2001000713 A1 WO 2001000713A1 FI 0000564 W FI0000564 W FI 0000564W WO 0100713 A1 WO0100713 A1 WO 0100713A1
Authority
WO
WIPO (PCT)
Prior art keywords
pigment
plastic
dry
applicable
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.)
Ceased
Application number
PCT/FI2000/000564
Other languages
English (en)
Inventor
Mikael Skrifvars
Toivo Kärnä
Timo Nyberg
Kaisa Putkisto
Veli KÄSMÄ
Juha Maijala
Harri Vuolle
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.)
Neste Chemicals Oy
Dynea Chemicals Oy
Original Assignee
Neste Chemicals Oy
Dynea Chemicals Oy
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
Priority claimed from FI991438A external-priority patent/FI991438L/fi
Application filed by Neste Chemicals Oy, Dynea Chemicals Oy filed Critical Neste Chemicals Oy
Priority to EP00940439A priority Critical patent/EP1200508A1/fr
Priority to CA002377231A priority patent/CA2377231A1/fr
Priority to EA200200074A priority patent/EA200200074A1/ru
Priority to BR0011922-9A priority patent/BR0011922A/pt
Priority to JP2001506720A priority patent/JP2003503606A/ja
Priority to AU55376/00A priority patent/AU5537600A/en
Publication of WO2001000713A1 publication Critical patent/WO2001000713A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C08J3/16—Powdering or granulating by coagulating dispersions
    • 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
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C09D133/04—Homopolymers or copolymers of esters
    • C09D133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C09D133/062—Copolymers with monomers not covered by C09D133/06
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/65—Additives macromolecular
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/67—Particle size smaller than 100 nm
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/68—Particle size between 100-1000 nm
    • 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
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/66—Additives characterised by particle size
    • C09D7/69—Particle size larger than 1000 nm
    • 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
    • D21H19/38—Coatings with pigments characterised by the pigments
    • D21H19/42—Coatings with pigments characterised by the pigments at least partly organic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
    • C08J2325/02—Homopolymers or copolymers of hydrocarbons
    • C08J2325/04—Homopolymers or copolymers of styrene
    • C08J2325/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
    • C08J2333/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters
    • C08J2333/06—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers esters of esters containing only carbon, hydrogen, and oxygen, the oxygen atom being present only as part of the carboxyl radical
    • C08J2333/10—Homopolymers or copolymers of methacrylic acid esters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/18—Spheres
    • C08L2205/20—Hollow spheres
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
    • C08L25/02—Homopolymers or copolymers of hydrocarbons
    • C08L25/04—Homopolymers or copolymers of styrene
    • C08L25/06—Polystyrene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • C08L33/04—Homopolymers or copolymers of esters
    • C08L33/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, which oxygen atoms are present only as part of the carboxyl radical
    • C08L33/10—Homopolymers or copolymers of methacrylic acid esters
    • 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
    • D21H23/00—Processes or apparatus for adding material to the pulp or to the paper
    • D21H23/02—Processes or apparatus for adding material to the pulp or to the paper characterised by the manner in which substances are added
    • D21H23/04—Addition to the pulp; After-treatment of added substances in the pulp
    • D21H23/20—Apparatus therefor

Definitions

  • the present invention relates to dry polymer pigments, particularly to plastic pigments applicable in dry form which pigments may be used in a dry coating method of paper and board, and to a method for producing polymer pigments applicable in dry form.
  • This invention is further directed to a method for dry coating of paper and board with a polymer pigment by ionic blasting, and to dry coated paper and board.
  • Synthetic plastic pigments are increasingly used in coating of paper, to partly or totally replace conventional inorganic pigments, such as calcium carbonate and kaolin.
  • Plastic pigments are commonly used as aqueous dispersions, i.e. latexes, with dry matter contents varying between 20 and 60 wt%.
  • Synthetic plastic pigments may either have a solid core, or they may be hollow. Chemically these plastic pigments are based on polyacrylate, polymethacrylate, or polystyrene, or the copolymers thereof and further pigments based on urea-formaldehyde and melamin-formaldehyde are used.
  • a plastic pigment, particularly a hollow particle pigment endows the product made thereof with opacity and brightness.
  • a problem related to the aqueous dispersions of plastic pigments is, however, limited storage stability, and solid polymer particles tend to settle on the bottom of the container during extended storage.
  • plastic pigments do not usually tolerate freezing and thawing, and the polymer pigment also coagulates easily when freezing. Accordingly, the storage temperature restricts the storage thereof.
  • the aqueous dispersions of plastic pigments are liable to microbial growth. For these reasons, a plastic pigment easily turns into a useless product.
  • the water content of the aqueous dispersions of plastic pigments being normally from 40 to 80 %, significant extra expenses are caused by the transportation of water.
  • Coating of paper is conventionally carried out by applying on a paper web a pigment dispersion or paste, typically containing from 30 to 40 % of water. Drying of the coated paper is an energy consuming process, since the water must be removed with for instance IR-dryers. This water pollutes the environment, and must accordingly be treated carefully before releasing it into surface waters. Moreover, the coating line of a paper machine with its paste kitchen is a relatively large unit requiring lots of space, and further, the coating line of a paper machine is a very significant investment.
  • the paste is applied onto the web without contacting it, by means of ionic blasting provided by high voltage, wherein the particles are charged by the ions formed by corona discharge. Thereafter, an electric field transfers the charged particles onto the paper web.
  • Many quality properties of the paper are also improved, since the paper substrate is no longer wetted and redryed.
  • An object of the present invention is a plastic polymer pigment applicable in dry form, a method for producing such a plastic polymer pigment, applicable in dry form, and the use of a plastic polymer pigment, applicable in dry form, in a method for dry coating of paper or board.
  • another object of the inven- tion is a method for dry coating of paper or board by ionic blasting with a polymer pigment, and dry coated paper or board.
  • the characteristic features of the plastic polymer pigment, applicable in dry form, the method for producing such a plastic polymer pigment, applicable in dry form, the use of a plastic polymer pigment, applicable in dry form, in a method for dry coating of paper or board, the method for dry coating of paper or board by ionic blasting with a polymer pigment, and the dry coated paper or board of the invention are presented in the claims.
  • paper and board may be coated with a dry coating method by using plastic polymer pigments applicable in dry form.
  • Plastic polymer pigments may be dryed with a suitable method, preferably by using spray drying technique to produce finely divided pigment powder.
  • Suit- able polymer pigments are at least plastic pigments based on polystyrene, polyacrylate, and polymethacrylate, poly(styrene-acrylate)copolymers, plastic pigments based on melamin-formaldehyde and urea-formaldehyde, or combinations thereof.
  • the plastic pigment is dryed from an aqueous dispersion having a dry matter content from 1 to 85 wt%, preferably from 5 to 60 wt%, by weight.
  • the particle size of the plastic pigment to be dryed is in the range of 10 - 2000 nm, preferably
  • the plastic pigment to be dryed is hydrophobic or hydrophilic, and it may contain various reactive groups allowing the modification of its properties.
  • the bulk density of the plastic pigment to be dryed is between 100 and 2000 g/1, and the glass transition temperature thereof is from 80 to 160 °C.
  • the plastic pigment may be either hollow or solid.
  • the polymer dispersion is pumped to a nozzle of a cyclone.
  • the nozzle may be stationary or rotating, and the dispersion is quickly heated therein by means of hot air, having a temperature from 150 to 250 °C.
  • the dispersion is then blown into the cyclone, wherein droplets are formed and at the same time, water is immediately evaporated.
  • the temperature in the cyclone is in the range of about 80 - 100 °C.
  • the dryed pigment powder is collected in the receptable of the cyclone. Any suitable spray drying apparatus may be used as the spray dryer.
  • the properties of the plastic pigment may further be modified in several ways, both chemically and physically.
  • rheological properties thereof may be controlled, including: a) the viscosity in the softening range, b) the elasticity that lowers the penetration and prevents excessive flowing, and c) the degree of crosslinking that influences the elasticity and viscosity.
  • Quick heating and compressing steps of the dry coating method also have a beneficial effect on the rheological and thermal properties of the plastic pigment.
  • the thermal resistance of the plastic pigment may preferably be improved with a melamin-formaldehyde or urea-formaldehyde treatment, the melting temperature may be modified, pressure resistance may be improved, and charging properties and printability may be adjusted as desired.
  • Both solid and liquid adjuvants and additives may be added to the dispersion before, and in some cases even after spray drying.
  • Granulating additives, adhesives, optical brighteners, latex, agent that modify the electrical properties, and other conventional additives for paper and board may be added to the dispersion.
  • Suitable granulating additives include carboxy methyl cellulose (CMC), polyvinyl alcohol (PVA), styrene butadiene latex (SBS), polyethylene wax (PE), the suitable amount of an additive being from 0,5 to 5 wt% of the dispersion.
  • Suitable binders of the coating include SBS and PVA. Suitable additives may be used to improve the brightness of the paper or board.
  • Antimicrobial additives may be used in the manufacture of antibacterial paper or liquid packaging board. Further, inorganic additives such as kaolin, talc, titanium dioxide, satin white, precipitated calcium carbonate (PCC), ground calcium carbonate (GCC) or like may be used, beneficially influencing the properties of the plastic pigment, including chemical, physi- cal, printing and economic features thereof. These additives may also be used to adjust the charging, binding, and powdering properties of the plastic pigment, as well as the handling properties thereof when transporting and transferring the material to the coating unit.
  • inorganic additives such as kaolin, talc, titanium dioxide, satin white, precipitated calcium carbonate (PCC), ground calcium carbonate (GCC) or like may be used, beneficially influencing the properties of the plastic pigment, including chemical, physi- cal, printing and economic features thereof.
  • PCC precipitated calcium carbonate
  • GCC ground calcium carbonate
  • the drying of the plastic pigment either as such or combined with additives results in finely divided pigment particle agglomerates in dry form, with a particle size between 1 and 500 ⁇ m, the dry matter content thereof being in the range of 85 - 100 %.
  • These pigment particle agglomerates consist of individual spherical pigment particles bonded together with electrostatic forces. These particles may be either hollow or solid.
  • the dryed plastic pigment powder may optionally be treated with a refiner wherein the structure is partly crushed thus increasing porosity and opacity.
  • a refiner wherein the structure is partly crushed thus increasing porosity and opacity.
  • dry plastic polymer pigment include the ease of transportation and storage, and resistance to temperature changes.
  • a plastic pigment for instance affects the printing properties as follows: a) printing quality is improved since the gloss and smoothness are improved and are more uniform throughout the surface, b) plastic pigment is favourable to the setting and stability of the printing ink, since the surface is not too porous and the ink does not penetrate too deeply into the paper, c) since the surface of the plastic pigment particles is not porous, the printing ink will not spread too much, or form blurred outlines, and d) with the plastic pigments, sufficient surface strenght for printing is attained.
  • the hollow structure yields the particle elasticity under compression, and thus the surface of the coating will be compressed more that its middle layer during calendering or like finishing step, and binding.
  • the hollow core of the particle endows the coating with opacity as the ability to scatter light improves, and a wide particle size distribution results in dense packing that leads to superior hid- ing power.
  • the optical properties of the product depend on the size, shape, and topology of the pigment particles and the distribution thereof, allowing the adjustment of gloss, smoothness, opacity, brightness and hiding power.
  • a polymer pigment to be stored in a dry form is not liable to microbial contamination, for instance to bacterial contamination in contrast to prior aqueous disper- sions.
  • the particle may be compressed without losing its hollow structure.
  • a respective effect may be provided by adjusting the hollow volume between 10 and
  • a pigment with a narrow size distribution is charged more uniformly than a pigment with a wide size distribution.
  • Hollow polymer pigments generally increase the stiffness of paper or board, and they have a high hiding power.
  • the plastic pigment also acts as a binder for an inorganic pigment thus improving the binding thereof, and the smoothness of the coating.
  • the hollow agglomerate structure of the plastic pigment is retained in the coating, the plastic pigment in- creasing the binding power of other coating materials.
  • the plastic pigment may improve the opacity of coating blends by preventing the agglomeration of mineral components and by uniformly distributing the pigment.
  • the structure and the large scattering area of the plastic pigment particles and agglomerates are favorable for attaining a high opacity and a sufficient brightness in a dry coating layer.
  • the amount of a polymer acting as an adhesive needed for a known pigment volume is lower. With the plastic pigment, the shade of the coated product may be adjusted as desired.
  • the plastic pigments may be considered acting as additives for finishing the paper surface, since they make the surface mode adjustable. Thus the undesired com- pression of the paper substrate under pressure decreases.
  • the weight of the coated paper may be decreases by using pigments with a lower density.
  • the fiber proportion of the paper sub- strate may respectively be increased, thus increasing the strenght of the paper.
  • a paper coated with a plastic pigment is lighter than conventional paper.
  • the efficiency of the coating unit may respectively be improved by increasing the speed.
  • an advantage of the finely divided plastic pigment coating is the fact that it shrinks less than film forming latexes of prior art after thermal treatment and binding.
  • the use of the plastic pigment applicable in dry form provides several advantages in dry coating in comparison to conventional inorganic pigments, including the fact that the plastic pigments softens at about 100 - 120 °C, and thus the plastic pigment applied is well bound to the paper substrate during calender- ing, typically carried out above the glass transition temperature of the plastic pigment. Because of this softening, no extra binder is needed. If necessary, the composition of the coating may be taylored as desired by using other additives and components with the plastic pigments, thus making a wide variety of plastic pigments available.
  • the properties of the plastic pigments may be chemi- cally modified and taylored as desired.
  • the paper coated with the plastic pigment may be recycled by burning, since it does not contain any nonburning inorganic matter, or the plastic pigment may be chemically separated from the paper.
  • a plastic pigment, applicable in dry form, was prepared by spray drying from a plastic pigment dispersion based on polyacrylate and polystyrene, having a dry matter content of 30 %, by weight.
  • the temperature of the nozzle of the cyclone was 160 °C, and the temperature in the cyclone was 80 °C.
  • a rotating nozzle was used in the cyclone, rotating at the speed of 30 000 rpm.
  • the particle size of the dry plastic pigment obtained was 60 ⁇ m, the density was 0.26 g/cm 3 , and the wa- ter content was 0.05 %, by weight.
  • the paper substrate used was a yellowish, rather coarse paper from mechanical pulp, having following characteristics: grammage about 70 g/m 2 thickness 120 - 124 ⁇ m
  • the plastic pigment powder was applied onto the paper substrate by ionic blasting. After application, the powder was irreversibly bound to the paper by thermal compression.
  • the temperatures used in binding were: 100 °C, 120 °C, 150 °C, 170 °C and 200 °C.
  • Linear loads of the calender used at control points were 3.4 kN/m, 6.8 kN/m and 13.7 kN/m.
  • the total numer of the control points made using this plastic pigment was 15.
  • the binding of the pigment with IR heating was studied, the temperature being in this case about 110 °C.
  • the tensile strenght, the tearing and burst resistances, smoothness, gloss, opacity, and brightness of the coated paper were tested after thermal compression.
  • the opacity and brightness increased significantly compared to the paper sub- strate at the temperature range of 100 - 150 °C. Above 150 °C the opacity and brightness were comparable to those of the paper substrate.
  • high printability values were obtained by binding the coating at a low temperature (100 °C) with a high linear load (13.7 kN/m), or by using IR heating (110 °C) with a low linear load (3.4 kN/m).
  • a plastic pigment applicable in dry form was prepared as described in Example 1.
  • the temperature of the nozzle was 210 °C.
  • the particle size of the dry plastic pigment obtained was 70 ⁇ m, its density was 0.30 g/cnr, and the water content was 0.05 %, by weight.
  • the paper substrate was coated as in Example 1.
  • the opacity increased significantly compared to the paper substrate at the temperature range of 100 - 150 °C. Above 150 °C, the opacity was comparable to that of the paper substrate.
  • the tensile strenght of the coated paper was on an average by 5 - 10 kN/m higher than that of the paper substrate, and the tensile strenght improved as the temperature rose. • IR heating improved the tensile strenght on an average by 5 kN/m.
  • high printability values were obtained by binding the coating at a low temperature (100 °C) with a high linear load (13.7 kN/m), or by using IR heating (110 °C) with low linear load (3.4 kN/m).
  • a plastic pigment applicable in dry form was prepared from a plastic pigment dispersion of polyacrylate-polystyrene, added with 10 %, by weight, of calcium carbonate (PCC). The drying was carried out as in Example 1. The particle size was 30 ⁇ m, and the water content was 0,05 %, by weight.
  • the coating was carried out as in Example 1.
  • the properties of the paper were as follows: • The grammage of the paper was by 15 - 20 g/m 2 higher than that of the paper substrate.
  • the tensile strenght of the coated paper increased on an average by 5 kN/m. • At lower temperatures, the gloss of the coated paper was lower that that of the paper substrate. As the temperature rose, the gloss was approximately 10 % higher than that of the paper substrate.
  • printability values were high for a sample bound at a high temperature (200 °C) using a medium linear load (6.8 kN/m).
  • a plastic pigment, applicable in dry form, was prepared from a plastic pigment dispersion of polyacrylate-polystyrene, added with 10 %, by weight, of titanium dioxide. The drying was carried out as in Example 1. The particle size was 27 ⁇ m, and the water content was 0,05 %, by weight.
  • the dry coating was carried out as in Example 1.
  • examples 1 - 4 the coated paper substrates were studied with SEM and stereo microscopy. The images obtained revealed that the resulting surface was very smooth due to the dense packing of the pigment agglomerates deforming under pressure.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)
  • Paints Or Removers (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)

Abstract

Cette invention concerne des pigments polymère secs, en particulier des pigments plastiques applicables sous forme sèche qui peuvent être utilisés pour le couchage de papier et de carton, ainsi qu'un procédé de fabrication de pigments applicables sous forme sèche. Le pigment polymère plastique applicable à sec comprend des particules de pigment plastique d'une taille comprise entre 10 et 2000 nm. La matière sèche du pigment représente de 85 à 100 % en poids dudit pigment, et les particules de pigment plastique constituent des agglomérats d'une taille allant de 1 à 500 νm.
PCT/FI2000/000564 1999-06-24 2000-06-22 Pigment polymere applicable a sec Ceased WO2001000713A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP00940439A EP1200508A1 (fr) 1999-06-24 2000-06-22 Pigment polymere applicable a sec
CA002377231A CA2377231A1 (fr) 1999-06-24 2000-06-22 Pigment polymere applicable a sec
EA200200074A EA200200074A1 (ru) 1999-06-24 2000-06-22 Полимерный пигмент, применяемый в сухом виде
BR0011922-9A BR0011922A (pt) 1999-06-24 2000-06-22 Pigmento de polìmero aplicável em forma seca
JP2001506720A JP2003503606A (ja) 1999-06-24 2000-06-22 ドライ形態に適用できるポリマー顔料
AU55376/00A AU5537600A (en) 1999-06-24 2000-06-22 Polymer pigment applicable in dry form

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
FI991438A FI991438L (fi) 1999-06-24 1999-06-24 Orgaaninen pigmenttigranulaatti paperin päällystystä varten
FI991438 1999-06-24
FI19991742A FI19991742A7 (fi) 1999-06-24 1999-08-17 Kuivana applikoituva polymeeripigmentti
FI19991742 1999-08-17

Publications (1)

Publication Number Publication Date
WO2001000713A1 true WO2001000713A1 (fr) 2001-01-04

Family

ID=26160757

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2000/000564 Ceased WO2001000713A1 (fr) 1999-06-24 2000-06-22 Pigment polymere applicable a sec

Country Status (9)

Country Link
EP (1) EP1200508A1 (fr)
JP (1) JP2003503606A (fr)
CN (1) CN1358210A (fr)
AU (1) AU5537600A (fr)
BR (1) BR0011922A (fr)
CA (1) CA2377231A1 (fr)
EA (1) EA200200074A1 (fr)
FI (1) FI19991742A7 (fr)
WO (1) WO2001000713A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002045869A1 (fr) 2000-12-07 2002-06-13 Metso Paper, Inc. Procede d'application a sec de matieres adhesives et a effet barriere sur des bandes et utilisation dudit procede
WO2001090260A3 (fr) * 2000-05-19 2002-06-13 Ppg Ind Ohio Inc Compositions de revetement a matrice ordonnee de maniere geometrique de particules polymeres et substrats revetus par ces compositions
WO2006008657A2 (fr) 2004-07-13 2006-01-26 Omya Development Ag Procede de fabrication de particules pigmentaires auto-liantes, seches ou en suspension ou dispersion aqueuses, contenant des matieres inorganiques et des liants
WO2006050873A1 (fr) * 2004-11-12 2006-05-18 Basf Aktiengesellschaft Pate a papier de couchage a base d'hybrides pigments-polymeres
WO2006050871A3 (fr) * 2004-11-12 2006-07-06 Basf Ag Pate a papier de couchage aqueuse contenant des hybrides pigments-polymeres
EP2447328A1 (fr) 2010-10-29 2012-05-02 Omya Development AG Procédé pour améliorer la maniabilité de matériaux contenant du carbonate de calcium

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI121087B (fi) * 2002-11-14 2010-06-30 Metso Paper Inc Päällystysmenetelmä
CN109942844A (zh) * 2019-03-29 2019-06-28 广东榕泰实业股份有限公司 一种氨基塑料再造粒生产工艺及生产装置

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GB2175591A (en) * 1985-05-09 1986-12-03 Mitsubishi Rayon Co Fine powder of an acrylonitrile-type polymer and method for its production
US4997870A (en) * 1988-11-25 1991-03-05 Wacker-Chemie Gmbh Process for the preparation of polyvinyl alcohols which are soluble in cold water and have been absorbed onto pigments
US5279708A (en) * 1990-08-03 1994-01-18 Imperial Chemical Industries Plc Spray drying process with spinning atomizer
JPH07233303A (ja) * 1994-02-23 1995-09-05 Mitsubishi Rayon Co Ltd アクリル系重合体粒子、およびそれを用いたアクリルゾル
EP0751192A1 (fr) * 1994-03-15 1997-01-02 Nippon Carbide Kogyo Kabushiki Kaisha Peinture pulverulente, son procede de fabrication et son mode d'utilisation
WO1999002572A1 (fr) * 1997-07-07 1999-01-21 Shin Dai-Ichi Vinyl Corporation Granules de chlorure de vinyle pour le traitement de pate et leur procedes de production

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US4087581A (en) * 1974-09-23 1978-05-02 Champion International Corporation Opacifying super-particles
US4582756A (en) * 1983-07-12 1986-04-15 Matsumoto Yushi-Seiyaku Co., Ltd. Organic microballoon
GB2175591A (en) * 1985-05-09 1986-12-03 Mitsubishi Rayon Co Fine powder of an acrylonitrile-type polymer and method for its production
US4997870A (en) * 1988-11-25 1991-03-05 Wacker-Chemie Gmbh Process for the preparation of polyvinyl alcohols which are soluble in cold water and have been absorbed onto pigments
US5279708A (en) * 1990-08-03 1994-01-18 Imperial Chemical Industries Plc Spray drying process with spinning atomizer
JPH07233303A (ja) * 1994-02-23 1995-09-05 Mitsubishi Rayon Co Ltd アクリル系重合体粒子、およびそれを用いたアクリルゾル
EP0751192A1 (fr) * 1994-03-15 1997-01-02 Nippon Carbide Kogyo Kabushiki Kaisha Peinture pulverulente, son procede de fabrication et son mode d'utilisation
WO1999002572A1 (fr) * 1997-07-07 1999-01-21 Shin Dai-Ichi Vinyl Corporation Granules de chlorure de vinyle pour le traitement de pate et leur procedes de production

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DATABASE WPI Week 199609, Derwent World Patents Index; AN 1996-080106, XP002951406, MITSUBISHI RAYON CO LTD: "Acrylic polymer particles prodn. for acrylic sols - by emulsion polymerising acrylic monomer and spray drying emulsion obtd." *
DATABASE WPI Week 199910, Derwent World Patents Index; AN 1999-120793, XP002951405, SHIN DAI-ICHI VINYL CORP: "Vinyl chloride resin granules for paste processing - produced by spray-drying aqueous vinyl chloride polymer dispersion with removal of fine particles" *

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7217746B2 (en) 2000-05-19 2007-05-15 Ppg Industries Ohio, Inc. Coating compositions having a geometrically ordered array of polymeric particles and substrates coated therewith
WO2001090260A3 (fr) * 2000-05-19 2002-06-13 Ppg Ind Ohio Inc Compositions de revetement a matrice ordonnee de maniere geometrique de particules polymeres et substrats revetus par ces compositions
WO2002045869A1 (fr) 2000-12-07 2002-06-13 Metso Paper, Inc. Procede d'application a sec de matieres adhesives et a effet barriere sur des bandes et utilisation dudit procede
EP1409152B1 (fr) * 2000-12-07 2009-07-29 Metso Paper, Inc. Procede d'application a sec de matieres adhesives et a effet barriere sur des bandes et utilisation dudit procede
WO2006008657A2 (fr) 2004-07-13 2006-01-26 Omya Development Ag Procede de fabrication de particules pigmentaires auto-liantes, seches ou en suspension ou dispersion aqueuses, contenant des matieres inorganiques et des liants
WO2006050873A1 (fr) * 2004-11-12 2006-05-18 Basf Aktiengesellschaft Pate a papier de couchage a base d'hybrides pigments-polymeres
WO2006050871A3 (fr) * 2004-11-12 2006-07-06 Basf Ag Pate a papier de couchage aqueuse contenant des hybrides pigments-polymeres
AU2005303977B2 (en) * 2004-11-12 2010-05-13 Omya International Ag Aqueous paper coating slip containing pigment-polymer hybrids
US7858154B2 (en) 2004-11-12 2010-12-28 Basf Aktiengesellschaft Paper coating slip based on pigment-polymer hybrids
EP2447328A1 (fr) 2010-10-29 2012-05-02 Omya Development AG Procédé pour améliorer la maniabilité de matériaux contenant du carbonate de calcium
WO2012055739A1 (fr) 2010-10-29 2012-05-03 Omya Development Ag Procédé pour l'amélioration du caractère manipulable de matériaux contenant du carbonate de calcium
US8999055B2 (en) 2010-10-29 2015-04-07 Omya International Ag Method for improving handleability of calcium carbonate containing materials
US9243122B2 (en) 2010-10-29 2016-01-26 Omya International Ag Method for improving handleability of calcium carbonate containing materials
EP3284789A1 (fr) 2010-10-29 2018-02-21 Omya International AG Procédé pour l'amélioration du caractère manipulable de matériaux contenant du carbonate de calcium

Also Published As

Publication number Publication date
CA2377231A1 (fr) 2001-01-04
FI19991742L (fi) 2000-12-24
FI19991742A7 (fi) 2000-12-24
JP2003503606A (ja) 2003-01-28
CN1358210A (zh) 2002-07-10
EP1200508A1 (fr) 2002-05-02
BR0011922A (pt) 2002-03-19
AU5537600A (en) 2001-01-31
EA200200074A1 (ru) 2002-04-25

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