WO2023230372A1 - Compositions de couche de base et structures cellulosiques revêtues - Google Patents

Compositions de couche de base et structures cellulosiques revêtues Download PDF

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Publication number
WO2023230372A1
WO2023230372A1 PCT/US2023/023805 US2023023805W WO2023230372A1 WO 2023230372 A1 WO2023230372 A1 WO 2023230372A1 US 2023023805 W US2023023805 W US 2023023805W WO 2023230372 A1 WO2023230372 A1 WO 2023230372A1
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WO
WIPO (PCT)
Prior art keywords
pigment component
basecoat
particle size
coated cellulosic
pigment
Prior art date
Application number
PCT/US2023/023805
Other languages
English (en)
Inventor
Steven G. BUSHHOUSE
Gary P. Fugitt
Scott E. Ginther
Original Assignee
Westrock Mwv, Llc
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 Westrock Mwv, Llc filed Critical Westrock Mwv, Llc
Publication of WO2023230372A1 publication Critical patent/WO2023230372A1/fr

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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
    • 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
    • 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
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/02—Emulsion paints including aerosols
    • C09D5/024—Emulsion paints including aerosols characterised by the additives
    • C09D5/028—Pigments; Filters
    • 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
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate

Definitions

  • the present application relates to the field of basecoat compositions and coated cellulosic structures.
  • Coated cellulosic structures are used in various packaging applications. For example, aseptic liquid packaging coated cellulosic structures are used for packaging beverage cartons, boxes and the like. Customers often prefer coated cellulosic structures having a generally smooth surface with few imperfections to facilitate the printing of high quality text and graphics, thereby increasing the visual appeal of products packaged in cellulosic.
  • U.S. Patent Nos. 8,916,636 and 9,206,553 disclose basecoat compositions and coated cellulosic structures formed from basecoat compositions that include a pigment component having a median particle size between about 3 and about 8 micrometers, and wherein at most about 15 percent by weight of the pigment component has a particle size smaller than 1 micrometer. It was discovered that, for a pigment component having a median particle size range between about 3 and about 8 micrometers, that the presence of excess fine particles, i.e., above 15 percent of particles having a particle size smaller than 1 micrometer, had a detrimental effect on smoothness.
  • the disclosed basecoat composition includes: a carrier component; and a pigment component dispersed in the carrier component, the pigment component comprising all pigments in the basecoat composition.
  • the pigment component has a median particle size between about 1 and about 2.5 micrometers and at most about 20 percent by weight of the pigment component has a particle size smaller than half the median particle size of the pigment component
  • the disclosed coated cellulosic structure includes a cellulosic substrate comprising a first major surface and a second major surface and a basecoat applied to at least one of the first major surface and the second major surface.
  • the basecoat includes a pigment component, the pigment component comprising all pigments in the basecoat.
  • the pigment component has a median particle size between about 1 and about 2.5 micrometers and at most about 20 percent by weight of the pigment component has a particle size smaller than half the median particle size of the pigment component.
  • FIG. 1 is a cross-sectional view of one example of the disclosed cellulosic structure.
  • FIG. 2 is a graphical representation of the cumulative mass percentages of particles sizes for pigments considered for use as a pigment component of the present description.
  • FIG. 3 is a graphical representation of the mass frequency size distributions of particles sizes for pigments considered for use as a pigment component of the present description and showing steepness indexes for the pigment components.
  • FIG. 4 is a graphical representation of the sediment void volume for pigments considered for use as a pigment component of the present description.
  • FIG. 5 is a graphical representation of basecoat smoothness versus coat weight for pigments considered for use as a pigment component of the present description.
  • FIG. 6 is a graphical representation of uncalendered topcoat smoothness versus coat weight for pigments considered for use as a pigment component of the present description.
  • FIG. 7 is a graphical representation of calendered topcoat smoothness versus coat weight for pigments considered for use as a pigment component of the present description.
  • a basecoat composition comprises a carrier component and a pigment component dispersed in the carrier component.
  • the pigment component comprises all pigments in the basecoat composition.
  • the pigment component has a median particle size between about 1 and about 2.5 micrometers. If the median particle size is below about 1 micrometers, then the pigment component may pass through the pits and crevices in the substrate surface and therefore fail to achieve satisfactory smoothness. If the median particle size is above about 2.5, then a fine pigment component source may not utilized.
  • the median particle size may be between about 1 and about 2 micrometers. In another aspect, the median particle size may be between about 1.5 and about 2.5 micrometers. In another aspect, the median particle size may be between about 1 and about 1.5 micrometers. In another aspect, the median particle size may be between about 1.5 and about 2 micrometers. In another aspect, the median particle size may be between about 2 and about 2.5 micrometers.
  • the pigment component at most about 20 percent by weight of the pigment component has a particle size smaller than half the median particle size of the pigment component. If an excessive amount of pigment component has a particle size smaller than half the median particle size of the pigment component, then there may be a detrimental effect on smoothness of the resulting base coat.
  • the pigment component may have a steepness index of at most about 1.3, preferably at most about 1.2, more preferably at most about 1.1, more preferably at most about 1.0, more preferably at most about 0.9. If the steepness index is too high, then there is a detrimental effect on smoothness of the resulting base coat.
  • the pigment component may include inorganic pigments, such as calcium carbonate.
  • the pigment component includes ground calcium carbonate.
  • the pigment component may have a sediment void volume of at least 40%, more preferably at least 41%, more preferably at least 42%, more preferably at least 43%, more preferably at least 44%, more preferably at least 45%, more preferably at least 46%.
  • a high sediment void volume increases a bulk property of the basecoat and has a beneficial effect on smoothness of the resulting base coat.
  • the basecoat composition may include a binder, such as a latex binder, in admixture with the carrier component and the pigment component
  • the basecoat composition may include a dispersant in admixture with the carrier component and the pigment component.
  • a coated cellulosic structure includes a cellulosic substrate comprising a first major surface and a second major surface and a basecoat applied to at least one of the first major surface and the second major surface.
  • the basecoat includes the pigment component described above.
  • the cellulosic substrate may have a basis weight of at least 85 pounds per 3000 ft 2 .
  • the base coat of the present description may be particularly suitable for paperboard and other substrates having a high basis weight.
  • the uncoated cellulosic substrate may have a high roughness before coating.
  • the uncoated cellulosic substrate may have a PPS roughness of at least 4 microns.
  • the uncoated cellulosic substrate may have a PPS roughness of at least 5 microns.
  • the uncoated cellulosic substrate may have a PPS roughness of at least 6 microns.
  • the uncoated cellulosic substrate may have a PPS roughness of at least 8 microns.
  • the base coat of the present description may be particularly suitable for a cellulosic substrate may have a high roughness.
  • the basecoat is applied at a coat weight of about 1 to about 20 pounds per 3000 ft 2 , preferably about 3 to about 15 pounds per 3000 ft 2 , more preferably about 6 to about 11 pounds per 3000 ft 2 .
  • the basecoat has a Parker Print Surf smoothness (PPS 1 OS) of at most about 6 microns, preferably at most about 5.9 microns, more preferably at most about 5.8 microns, more preferably at most about 5.7 microns, more preferably at most about 5.6 microns, more preferably at most about 5.5 microns, more preferably at most about 5.4 microns, more preferably at most about 5.3 microns.
  • PPS 1 OS Parker Print Surf smoothness
  • the Parker Print Surf smoothness (PPS 10S) may depend on a roughness of the uncoated substrate.
  • the basecoat may have a Parker Print Surf smoothness (PPS 10S) of at least 0.5 microns less than the Parker Print Surf smoothness (PPS 10S) of the uncoated substrate.
  • the basecoat may have a Parker Print Surf smoothness (PPS 10S) of at least 1.0 microns less than the Parker Print Surf smoothness (PPS 10S) of the uncoated substrate.
  • the basecoat may have a Parker Print Surf smoothness (PPS 10S) of at least 1.5 microns less than the Parker Print Surf smoothness (PPS 10S) of the uncoated substrate.
  • the basecoat may have a Parker Print Surf smoothness (PPS 10S) of at least 2.0 microns less than the Parker Print Surf smoothness (PPS 10S) of the uncoated substrate.
  • the coated cellulosic structure further includes an uncalendered topcoat positioned over the basecoat.
  • the uncalendered topcoat may have a Parker Print Surf smoothness (PPS 10S) of at most about 3.1 microns, preferably at most about 3.0 microns, more preferably at most about 2.9 microns, more preferably at most about 2.8 microns.
  • the Parker Print Surf smoothness (PPS 10S) may depend on a roughness of the basecoat.
  • the uncalendered topcoat may have a Parker Print Surf smoothness (PPS 10S) of at least 0.5 microns less than the Parker Print Surf smoothness (PPS 10S) of the basecoat.
  • the uncalendered topcoat may have a Parker Print Surf smoothness (PPS IOS) of at least 1.0 microns less than the Parker Print Surf smoothness (PPS 10S) of the basecoat. In another aspect, the uncalendered topcoat may have a Parker Print Surf smoothness (PPS 10S) of at least 1.5 microns less than the Parker Print Surf smoothness (PPS 10S) of the basecoat. In another aspect, the uncalendered topcoat may have a Parker Print Surf smoothness (PPS 10S) of at least 2.0 microns less than the Parker Print Surf smoothness (PPS 10S) of the basecoat.
  • the coated cellulosic structure further includes a calendered topcoat positioned over the basecoat. The calendered topcoat may have a Parker Print Surf smoothness (PPS 10S) of at most about 2.8 microns, preferably at most about 2.7 microns, more preferably at most about 2.6 microns.
  • one example of the disclosed cellulosic structure may include a cellulosic substrate 12, a basecoat 14 and, optionally, a topcoat 16.
  • the cellulosic substrate 12 may include a first major surface 18 and a second major surface 20.
  • the basecoat 14 may be applied only to the first major surface 18 (CIS) or to both the first major surface 18 and the second major surface 20 (C2S).
  • the topcoat 16 may be applied over the basecoat 14 to present an outermost coating surface 22. Additional coating layers (not shown) may be positioned between the basecoat 14 and the topcoat 16 without departing from the scope of the present disclosure.
  • the cellulosic substrate 12 may be any web of fibrous material that is capable of being coated with the disclosed basecoat 14.
  • the cellulosic substrate 12 may be bleached or unbleached.
  • the cellulosic substrate 12 may be paper or paperboard.
  • the cellulosic substrate 12 may have an uncoated basis weight of about 85 pounds per 3000 ft 2 or more.
  • Examples of appropriate cellulosic substrates 12 include corrugating medium, linerboard, solid bleached sulfate (SBS) and aseptic liquid packaging paperboard
  • the basecoat 14 may be applied to the first major surface 18 of the cellulosic substrate 12 in a quantity sufficient to fill the pits and crevices in the first major surface 18 without the need for coating the entire first major surface 18 of the cellulosic substrate 12, thereby forming a discontinuous film on the first major surface 18.
  • the basecoat 14 may be applied using a blade coater such that the blade coater urges the basecoat 14 into the pits and crevices in the first major surface 18 while removing the basecoat 14 from the first major surface 18.
  • the basecoat 14 may be applied in a manner that is akin to spackling, wherein substantially all of the basecoat 14 resides in the pits and crevices in the first major surface 18 of the cellulosic substrate 12 rather than on the first major surface 18 of the cellulosic substrate 12.
  • the spacing between the moving cellulosic substrate 12 and the blade of the coater may be minimized to facilitate filling the pits and crevices in the first major surface 18 without substantially depositing the basecoat 14 on the first major surface 18 of the cellulosic substrate 12 (i.e., forming a discontinuous film on the first major surface 18 of the cellulosic substrate 12).
  • the blade of the coater may be positioned sufficiently close to the first major surface 18 of the moving cellulosic substrate 12 such that the blade of the coater urges the basecoat 14 into the pits and crevices in the first major surface 18 of the cellulosic substrate 12, while removing excess basecoat 14 from the first major surface 18 of the cellulosic substrate 12.
  • the topcoat 16 may be any appropriate topcoat.
  • the topcoat 16 may include calcium carbonate, clay and various other components and may be applied over the basecoat 14 as a slurry.
  • Topcoats are well known by those skilled in the art and any conventional or non-conventional topcoat composition may be used without departing from the scope of the present disclosure.
  • the basecoat 14 may include a pigment component having an engineered particle size distribution, as discussed in greater detail herein.
  • the basecoat 14 may be initially prepared as a basecoat composition that includes a pigment component and a carrier component.
  • the carrier component may include any suitable carrier, such as water.
  • the pigment component may be dispersed in the carrier component to facilitate application of the basecoat 14 to the cellulosic substrate 12.
  • the basecoat composition may have a solids content of at most about 70 percent by weight though those skilled in the art will appreciate that the appropriate solids content may depend on various factors, such as the technique being used to apply the basecoat composition to the cellulosic substrate 12. Additional components, such as binders (e.g., latex, starch, etc.), thickeners, stabilizers, dispersing agents and the like, may be included in the basecoat composition without departing from the scope of the present disclosure.
  • binders e.g., latex, starch, etc.
  • thickeners e.g., stabilizers,
  • the pigment component of the basecoat 14 refers to all of the pigments within the basecoat 14 (or the basecoat composition).
  • the pigment component may include a single type of pigment or, alternatively, may be a blend of two or more different pigments.
  • the “particle size” of a pigment refers to the equivalent spherical diameter of the pigment, which may be measured using a particle size analyzer regardless of whether the particles are spherical (or near spherical) or non- spherical.
  • the particle size data can be collected, for instance, using a SEDIGRAPH® particle size analyzer.
  • median particle size refers to the particle size at which 50 percent (by weight) of the pigment particles are less than that particle size.
  • the steepness index of the disclosed pigment component may be less than a threshold value, which may correspond to a relatively narrow particle size distribution.
  • the disclosed pigment component particle size distribution may be obtained by selecting a single pigment for use as the entire pigment component, wherein the single pigment provides the desired particle size distribution. It is also contemplated that pigments and pigment blends may be engineered to have the disclosed pigment component particle size distribution. The disclosed particle size distribution may be achieved by mixing together various pigments in appropriate proportions or an existing pigment or pigment blend may be processed to achieve the disclosed particle size distribution.
  • the pigment component may be substantially entirely comprised of inorganic pigments.
  • the pigment component may include both inorganic and organic pigments.
  • the pigment component may be substantially free of platy pigments, e.g., having an average shape factor less than 60, preferably less than 50, preferably less than 40.
  • Examples of pigments that may be used to design a pigment component having the disclosed particle size distribution include, but are not limited to, precipitated calcium carbonate, ground calcium carbonate, talc and clay (e.g., kaolin).
  • H60 and H90 are control pigments.
  • the pigment from Omya called Primefdl was used as the broader fine NPS experimental pigment, and the other three experimental pigments were ones made in the pilot plant.
  • Table 1 above and graphs of FIGS. 2 and 3 show the characterizations of the pigments chosen for the pilot coater trial. Sediment void volumes are on FIG. 4. The pigment properties are best explained using the graph on FIG. 3. The characterizations for each pigment are shown on the graph.
  • Each of these pigments were used as basecoat pigments for the pilot coater trial.
  • a paperboard having an uncoated roughness of about 7.5 microns was used as a substrate.
  • the basecoats were topcoated with the same topcoat.
  • the coating formulations used are shown in Tables 2 and 3, below.
  • Styrene acrylic latex binder was used as a binder.
  • Fennoflow L29 is an alkali swellable thickener that was used for viscosity control. Enough was added to get a coating Brookfield viscosity of about 3000 centipoise at 20 rpm. It was added at roughly 0.5%, but varies for each coating based on viscosity.
  • the test results are summarized in the three PPS smoothness graphs of FIGS. 5 to 7. All three graphs are similar.
  • the first graph of FIG. 5 contains the basecoat-only data.
  • the second graph of FIG. 6 shows uncalendered topcoated smoothness.
  • the third graph of FIG. 7 shows calendered topcoated smoothness. All three graphs demonstrate the effectiveness of the NPS carbonates to reduce surface roughness. It appears that the smoothness results correlate more closely to the % fines than the steepness index. However, the low steepness index is expected to be supportive of reduce surface roughness.
  • a basecoat composition comprising: a carrier component; and a pigment component dispersed in the carrier component, the pigment component comprising all pigments in the basecoat composition, wherein the pigment component has a median particle size between about 1 and about 2.5 micrometers, wherein at most about 20 percent by weight of the pigment component has a particle size smaller than half the median particle size of the pigment component.
  • Clause 2 The basecoat composition of Clause 1 wherein the median particle size is between about 1 and about 2 micrometers.
  • Clause 3 The basecoat composition of Clause 1 wherein the median particle size is between about 1.5 and about 2.5 micrometers.
  • Clause 4 The basecoat composition of Clause 1 wherein the median particle size is between about 1 and about 1.5 micrometers.
  • Clause 5 The basecoat composition of Clause 1 wherein the median particle size is between about 1.5 and about 2 micrometers.
  • Clause 6 The basecoat composition of Clause 1 wherein the median particle size is between about 2 and about 2.5 micrometers.
  • Clause 7 The basecoat composition of any one of Clauses 1-6 wherein the pigment component has a steepness index of at most about 1.3.
  • Clause 8 The basecoat composition of any one of Clauses 1-6 wherein the pigment component has a steepness index of at most about 1.2.
  • Clause 9 The basecoat composition of any one of Clauses 1-6 wherein the pigment component has a steepness index of at most about 1.1.
  • Clause 10 The basecoat composition of any one of Clauses 1-6 wherein the pigment component has a steepness index of at most about 1.0.
  • Clause 11 The basecoat composition of any one of Clauses 1-6 wherein the pigment component has a steepness index of at most about 0.9.
  • Clause 12 The basecoat composition of any one of Clauses 1-11 wherein the pigment component comprises inorganic pigments.
  • Clause 13 The basecoat composition of any one of Clauses 1-11 wherein the pigment component comprises calcium carbonate.
  • Clause 14 The basecoat composition of any one of Clauses 1-11 wherein the pigment component comprises ground calcium carbonate.
  • Clause 15 The basecoat composition of any one of Clauses 1-14 further comprising a binder in admixture with the carrier component and the pigment component.
  • Clause 16 The basecoat composition of any one of Clauses 1-14 further comprising a latex binder in admixture with the carrier component and the pigment component.
  • Clause 17 The basecoat composition of any one of Clauses 1-16 further comprising a dispersant in admixture with the carrier component and the pigment component.
  • Clause 18 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 40%.
  • Clause 19 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 41%.
  • Clause 20 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 42%.
  • Clause 21 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 43%.
  • Clause 22 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 44%.
  • Clause 23 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 45%.
  • Clause 24 The basecoat composition of any one of Clauses 1-17 wherein the pigment component has a sediment void volume of at least 46%.
  • a coated cellulosic structure comprising: a cellulosic substrate comprising a first major surface and a second major surface; and a basecoat applied to at least one of the first major surface and the second major surface, the basecoat comprising: a pigment component, the pigment component comprising all pigments in the basecoat, wherein the pigment component has a median particle size of less than about 3 micrometers, and wherein at most about 20 percent by weight of the pigment component has a particle size smaller than half the median particle size of the pigment component.
  • Clause 26 The coated cellulosic structure of Clause 25 wherein the median particle size is between about 1 and about 2 micrometers.
  • Clause 27 The coated cellulosic structure of Clause 25 wherein the median particle size is between about 1.5 and about 2.5 micrometers.
  • Clause 28 The coated cellulosic structure of Clause 25 wherein the median particle size is between about 1 and about 1.5 micrometers.
  • Clause 29 The coated cellulosic structure of Clause 25 wherein the median particle size is between about 1.5 and about 2 micrometers.
  • Clause 30 The coated cellulosic structure of Clause 25 wherein the median particle size is between about 2 and about 2.5 micrometers.
  • Clause 31 The coated cellulosic structure of any one of Clauses 25-30 wherein the pigment component has a steepness index of at most about 1.3.
  • Clause 32 The coated cellulosic structure of any one of Clauses 25-30 wherein the pigment component has a steepness index of at most about 1.2.
  • Clause 33 The coated cellulosic structure of any one of Clauses 25-30 wherein the pigment component has a steepness index of at most about 1.1.
  • Clause 34 The coated cellulosic structure of any one of Clauses 25-30 wherein the pigment component has a steepness index of at most about 1.0.
  • Clause 35 The coated cellulosic structure of any one of Clauses 25-30 wherein the pigment component has a steepness index of at most about 0.9.
  • Clause 36 The coated cellulosic structure of any one of Clauses 25-35 wherein the pigment component comprises inorganic pigments.
  • Clause 37 The coated cellulosic structure of any one of Clauses 25-35 wherein the pigment component comprises calcium carbonate.
  • Clause 38 The coated cellulosic structure of any one of Clauses 25-35 wherein the pigment component comprises ground calcium carbonate.
  • Clause 39 The coated cellulosic structure of any one of Clauses 25-38 further comprising a binder in admixture with the pigment component.
  • Clause 40 The coated cellulosic structure of any one of Clauses 25-39 further comprising a thickener in admixture with the pigment component.
  • Clause 41 The coated cellulosic structure of any one of Clauses 25-40 wherein the cellulosic substrate has a basis weight of at least 85 pounds per 3000 ft2.
  • Clause 42 The coated cellulosic structure of any one of Clauses 25-41 wherein the basecoat is applied at a coat weight of about 1 to about 20 pounds per 3000 ft2.
  • Clause 43 The coated cellulosic structure of any one of Clauses 25-41 wherein the basecoat is applied at a coat weight of about 3 to about 15 pounds per 3000 ft2.
  • Clause 44 The coated cellulosic structure of any one of Clauses 25-41 wherein the basecoat is applied at a coat weight of about 6 to about 11 pounds per 3000 ft2.
  • Clause 45 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 6 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 46 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.9 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 47 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.8 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 48 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.7 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 49 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.6 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 50 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.5 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 51 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.4 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 52 The coated cellulosic structure of any one of Clauses 25-44 wherein the basecoat has a Parker Print Surf smoothness (PPS 10S) of at most about 5.3 microns.
  • Clause 53 The coated cellulosic structure of any one of Clauses 25-52 further comprising an uncalendered topcoat positioned over the basecoat.
  • Clause 54 The coated cellulosic structure of Clause 53 wherein the uncalendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 3.1 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 55 The coated cellulosic structure of Clause 53 wherein the uncalendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 3.0 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 56 The coated cellulosic structure of Clause 53 wherein the uncalendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 2.9 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 58 The coated cellulosic structure of any one of Clauses 25-52 further comprising a calendered topcoat positioned over the basecoat.
  • Clause 59 The coated cellulosic structure of Clause 58 wherein the calendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 2.8 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 60 The coated cellulosic structure of Clause 58 wherein the calendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 2.7 microns.
  • PPS 10S Parker Print Surf smoothness
  • Clause 61 The coated cellulosic structure of Clause 58 wherein the calendered topcoat has a Parker Print Surf smoothness (PPS 10S) of at most about 2.6 microns.
  • PPS 10S Parker Print Surf smoothness

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Nanotechnology (AREA)
  • Inorganic Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Paper (AREA)

Abstract

Composition de couche de base comprenant : un composant de support; et un composant de pigment dispersé dans le composant de support, le composant de pigment représentant l'intégralité des pigments dans la composition de couche de base. Le composant de pigment a une taille de particule médiane comprise entre environ 1 et environ 2,5 micromètres et au plus environ 20 pour cent en poids du composant de pigment ont une taille de particule inférieure à la moitié de la taille de particule médiane du composant de pigment.
PCT/US2023/023805 2022-05-27 2023-05-30 Compositions de couche de base et structures cellulosiques revêtues WO2023230372A1 (fr)

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US63/346,366 2022-05-27

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006328595A (ja) * 2005-05-27 2006-12-07 Oji Paper Co Ltd 印刷用塗被紙およびその製造方法
US20090236062A1 (en) * 2008-03-21 2009-09-24 Fugitt Gary P Method For Coating Dry Finish Paperboard
US20100330279A1 (en) * 2007-04-05 2010-12-30 Yki, Ytkemiska Insitutet Ab Aqueous dispersion, a coated subject and use of an aqueous dispersion
US20140272299A1 (en) * 2013-03-14 2014-09-18 Meadwestvaco Corporation Basecoat Composition and Associated Paperboard Structure
US8916636B2 (en) 2013-03-14 2014-12-23 Meadwestvaco Corporation Basecoat composition and associated paperboard structure
EP2970685A1 (fr) * 2013-03-14 2016-01-20 MeadWestvaco Corporation Composition de couche de fond et structure de carton correspondante

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006328595A (ja) * 2005-05-27 2006-12-07 Oji Paper Co Ltd 印刷用塗被紙およびその製造方法
US20100330279A1 (en) * 2007-04-05 2010-12-30 Yki, Ytkemiska Insitutet Ab Aqueous dispersion, a coated subject and use of an aqueous dispersion
US20090236062A1 (en) * 2008-03-21 2009-09-24 Fugitt Gary P Method For Coating Dry Finish Paperboard
US20140272299A1 (en) * 2013-03-14 2014-09-18 Meadwestvaco Corporation Basecoat Composition and Associated Paperboard Structure
US8916636B2 (en) 2013-03-14 2014-12-23 Meadwestvaco Corporation Basecoat composition and associated paperboard structure
US9206553B2 (en) 2013-03-14 2015-12-08 Westrock Mwv, Llc Basecoat composition and associated paperboard structure
EP2970685A1 (fr) * 2013-03-14 2016-01-20 MeadWestvaco Corporation Composition de couche de fond et structure de carton correspondante

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