EP3728734A1 - Composition pour sauce de couchage papetière - Google Patents

Composition pour sauce de couchage papetière

Info

Publication number
EP3728734A1
EP3728734A1 EP18833952.7A EP18833952A EP3728734A1 EP 3728734 A1 EP3728734 A1 EP 3728734A1 EP 18833952 A EP18833952 A EP 18833952A EP 3728734 A1 EP3728734 A1 EP 3728734A1
Authority
EP
European Patent Office
Prior art keywords
monomer
weight
acrylate
methacrylate
composition according
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.)
Pending
Application number
EP18833952.7A
Other languages
German (de)
English (en)
French (fr)
Inventor
Francis Bony
Clémentine CHAMPAGNE
François DUPONT
Laurie PARRENIN
Jean-Marc Suau
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.)
Coatex SAS
Original Assignee
Coatex SAS
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 Coatex SAS filed Critical Coatex SAS
Publication of EP3728734A1 publication Critical patent/EP3728734A1/fr
Pending legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
    • 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
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/16—Solid spheres
    • C08K7/18—Solid spheres inorganic
    • 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
    • C08L33/02—Homopolymers or copolymers of acids; Metal or ammonium salts thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L71/00—Compositions of polyethers obtained by reactions forming an ether link in the main chain; Compositions of derivatives of such polymers
    • C08L71/02—Polyalkylene oxides
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L99/00—Compositions of natural macromolecular compounds or of derivatives thereof not provided for in groups C08L89/00 - C08L97/00
    • 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
    • C09D133/08—Homopolymers or copolymers of acrylic acid esters
    • 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
    • C09D133/10—Homopolymers or copolymers of methacrylic acid esters
    • 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
    • C09D133/14—Homopolymers or copolymers of esters of esters containing halogen, nitrogen, sulfur or oxygen atoms in addition to the carboxy oxygen
    • 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
    • C09D171/00—Coating compositions based on polyethers obtained by reactions forming an ether link in the main chain; Coating compositions based on derivatives of such polymers
    • C09D171/02—Polyalkylene oxides
    • 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
    • D21H19/385—Oxides, hydroxides or carbonates
    • 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
    • D21H19/60—Polyalkenylalcohols; Polyalkenylethers; Polyalkenylesters
    • 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
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • 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
    • D21H23/22—Addition to the formed paper
    • D21H23/30—Pretreatment of the paper
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/54—Aqueous solutions or dispersions
    • 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

Definitions

  • the invention relates to a composition for a paper coating sauce comprising a thickening acrylic acid copolymer, a particulate mineral material, a binder and water.
  • the invention also relates to the use of this composition for the preparation of paper or board by improving the water retention of the coating color.
  • the copolymer of the composition according to the invention makes it possible to improve the viscosity under a low shear gradient, while improving the retention of water within the composition used.
  • Thickening copolymers used for the preparation of papermaking coatings are known.
  • compositions must have viscosities under different shear gradients that allow them to be used effectively, especially when applied to the surface of a paper sheet.
  • These compositions must have an apparent viscosity, therefore under a low shear rate, which is well suited to effective application.
  • compositions must be controlled and allow them to be pumped or filtered easily, especially in the feed circuits of paper coating processes.
  • These compositions must also make it possible to limit or even prevent the formation of foams or splashes. They must also limit or prevent the sedimentation of the particles used.
  • the compatibility of the various constituents of a paper coating sauce must also be taken into account.
  • compositions for preparing paper coating coatings that do not include or little methacrylic acid, while offering maintained or improved performance compared to the compositions.
  • methacrylic acid especially methacrylic acid mainly prepared from acetone cyanohydrin which is a highly toxic compound, should be limited as much as possible.
  • EP 2585503 relates to alkali-swellable thickening emulsions, free of methacrylic acid, which are prepared in the absence of surfactant. They serve to thicken aqueous media.
  • FR 2961816 also relates to inflatable alkali thickening emulsions, comprising AMPS and free of methacrylic acid, which are prepared in the absence of surfactant.
  • EP 1134263 discloses a composition comprising a binder copolymer and an alkali-soluble emulsion polymer which is hydrophobically modified (HASE).
  • EP 2534205 discloses a composition useful for increasing the viscosity of a fluid, particularly when used for hydraulic fracturing, and which comprises in particular an anionic polysaccharide.
  • FR 2894998 relates to a method of manufacturing coating colors which comprises a comb polymer.
  • FR 2796403 relates to the use of water-soluble copolymers for the preparation of paper sheets.
  • EP 2556192 discloses a paper coating color which comprises a styrene latex as a rheology modifier.
  • the aqueous composition for preparing a paper coating sauce according to the invention makes it possible to provide a solution to all or part of the problems of the compositions of the state of the art.
  • the invention provides an aqueous composition for preparing a paper coating sauce comprising:
  • (a2) at least one ester of an acid (a2) selected from acrylic acid, methacrylic acid, itaconic acid, crotonic acid, maleic acid, maleic anhydride and
  • (a3) at least one compound (a3) selected from 2-acrylamido-2-methylpropanesulphonic acid, 2-sulfoethyl methacrylate, sodium methallyl sulfonate, styrene sulfonate, their salts and combinations thereof,
  • the monomer (a1) is the only monomer (al-1), in particular the only acrylic acid.
  • the preferred (al-1) monomer is also acrylic acid.
  • the preferred monomer (a1-2) according to the invention is methacrylic acid.
  • the proportion by weight (Al-1) / (Al-2) is greater than 0.2 or 0.5, more preferably greater than 1 or 2.
  • the proportion by weight (al-1) / (al-2) is greater than 5 or 8, still more preferably greater than 10 or 15.
  • the proportion by weight (al-1) / (al-2) is greater than 20 or 35, also more preferably greater than 50 or 80.
  • the proportion by weight ( ⁇ -1) / ( ⁇ -2) can range from 0.2 to 80, preferably from 0.5 to 50, more preferably from 1 to 35, more preferably from 2 to at 20, still more preferably 5 to 15 or 8 to 10.
  • the amount by weight of monomer (a1-l) is greater than the amount by weight of monomer (a1-2), preferably the amount by weight of monomer (a1-l) is at less than 1.5 times, twice, 3 times, 4 times, 5 times, 8 times, 10 times more than the amount by weight of monomer (a-2).
  • the monomer (a2) which is preferred according to the invention is chosen from styrene, vinylcaprolactam and alkyl acrylate, in particular C 1 -C 10 alkyl acrylate, preferentially C 1 -C 4 alkyl acrylate, more preferably methyl acrylate, acrylate.
  • the more preferred monomer (a2) according to the invention is chosen from methyl acrylate, ethyl acrylate, isobutyl acrylate, n-butyl acrylate and methyl methacrylate, more preferably methyl acrylate or ethyl acrylate.
  • Preferred monomer (a3) salts are sodium and ammonium salts.
  • the preferred monomer (a3) according to the invention is 2-acrylamido-2-methylpropanesulphonic acid (AMPS) or its sodium or ammonium salts.
  • AMPS 2-acrylamido-2-methylpropanesulphonic acid
  • the copolymer (a) can be prepared by a polymerization reaction also implementing at least one monomer (a4) which is a compound of formula
  • n and n identical or different, independently represent 0 or an integer or decimal number less than 150, m or n is not equal to 0,
  • - OE represents a group CH2CH2O
  • OP represents independently a group chosen from CH (CH 3 ) CH 2 0 and CH 2 CH (CH 3 ) O,
  • R 1 represents a group comprising at least one polymerizable olefinic unsaturation, preferably a group selected from acrylate, methacrylate, acrylurethane, methacrylurethane, vinyl, allyl, methallyl and isoprenyl, more preferably a methacrylate group,
  • R 2 represents a linear, branched or cyclic, saturated, unsaturated or aromatic hydrocarbon group comprising from 6 to 40 carbon atoms, preferably a linear or branched C 6 -C 4 o-alkyl group, preferably a C 8 group; -C 3 o-alkyl, linear or branched, a C 6 -Gio-aryl group, preferably a C 8 -C 3 o-aryl group, for example a tristyrylphenyl group.
  • the monomer (a4) is a compound of formula (I) in which:
  • n represents an integer or decimal number ranging from 20 to 40 and n is zero or m and n independently represent an integer or decimal number ranging from 5 to 100 or
  • the mass ratio m / n ranges from 90/10 to 70/30.
  • the monomer (a4) is a compound of formula (I) in which:
  • n represents an integer or decimal number ranging from 20 to 40 and n is zero, m and n independently represent an integer or decimal number ranging from 5 to 100 and
  • the mass ratio m / n ranges from 90/10 to 70/30.
  • the copolymer (a) can be prepared by a polymerization reaction also implementing at least one monomer (a5) chosen from:
  • polyalkylene glycol acrylate preferably polyethylene glycol acrylate or polyethylene polypropylene glycol acrylate
  • polyalkylene glycol methacrylate preferably polyethylene glycol methacrylate or polyethylenepolypropylene glycol methacrylate, allylpolyalkyleneglycol, preferably allylpolyethyleneglycol or allylpolyethylenepolypropyleneglycol, methallylpolyalkyleneglycol, preferably methallylpolyethyleneglycol or methallylpolyethylenepolypropyleneglycol,
  • the preferred monomer (a5) according to the invention is a polyalkylene glycol methacrylate, more preferably polyethylene glycol methacrylate or polyethylene polypropylene glycol methacrylate.
  • the copolymer (a) can be prepared by a polymerization reaction also implementing at least one crosslinking monomer (a6) or at least one monomer comprising at least two olefinic unsaturations.
  • Examples of monomer (a6) according to the invention are unsaturated crosslinking monomers, for example polyunsaturated aromatic monomers such as divinylbenzene, divinyl naphthalene and trivinylbenzene, polyunsaturated alicyclic monomers eg 1,2,4-trivinylcyclohexane, phthalic acid esters difunctionals such as diallyl phthalate, polyalkenyl ethers such as triallyl pentaerythritol, diallyl pentaerythritol, diallyl sucrose, octaallyl sucrose and trimethylolpropane diallyl ether, polyunsaturated esters of polyalcohols or polyacids such as 1,6-hexanediol di (meth) acrylate, tetramethylene tri (meth) acrylate, allyl acrylate, diallyl itaconate, diallyl fumarate, diallyl maleate, tri
  • the proportions of the various monomers used in the preparation of the copolymer (a) can vary in fairly wide proportions.
  • the copolymer (a) comprises:
  • the copolymer (a) may also comprise: from 20 to 69% by weight of monomer (a1), from 29.5 to 78.5% by weight of monomer (a2), from 1 to 5% by weight of monomer (a3) ) and from 0.5 to 30% by weight of monomer (a4).
  • the copolymer (a) may also comprise: from 20 to 69% by weight of monomer (a1), from 29.5 to 78.5% by weight of monomer (a2), from 1 to 5% by weight of monomer (a3) ) and from 0.5 to 30% by weight of monomer (a5).
  • the copolymer (a) may also comprise: from 19.9 to 68.9% by weight of monomer (a1), from 30 to 79% by weight of monomer (a2), from 1 to 5% by weight of monomer (a3) ) and from 0.1 to 5% by weight of monomer (a6).
  • the copolymer (a) may also comprise: from 15 to 69% by weight of monomer (a1), from 29 to 83% by weight of monomer (a2), from 1 to 5% by weight of monomer (a3), from 0 5 to 30% by weight of monomer (a4) and from 0.5 to 30% by weight of monomer (a5).
  • the copolymer (a) may also comprise: from 19.9 to 68.9% by weight of monomer (a1), from 29.5 to 78.5% by weight of monomer (a2), from 1 to 5% by weight monomer (a3), from 0.5 to 30% by weight of monomer (a4) and from 0.1 to 5% by weight of monomer (a6).
  • the copolymer (a) may also comprise: from 19.9 to 68.9% by weight of monomer (a1), from 29.5 to 78.5% by weight of monomer (a2), from 1 to 5% by weight monomer (a3), from 0.5 to 30% by weight of monomer (a5) and
  • the copolymer (a) may also comprise:
  • composition according to the invention comprises at least one mineral material in the form of particles.
  • the particles of mineral material have a size less than 50 ⁇ m or a size ranging from 0.05 ⁇ m to 50 ⁇ m. More preferably according to the invention, the particles of mineral material have a size less than 10 ⁇ m or less than 5 ⁇ m. In a much more preferred manner according to the invention, the particles of mineral material have a size of less than 2 ⁇ m or less than 1 ⁇ m or even less than 0.5 ⁇ m.
  • the spherical equivalent diameter of the particles of mineral material for a size ranging from 0.05 ⁇ m to 50 ⁇ m or less than 50 ⁇ m, is equal to 60% by weight or equal to 70% by weight. weight.
  • the spherical equivalent diameter of the particles of mineral material for a size ranging from 0.05 ⁇ m to 50 ⁇ m or less than 50 ⁇ m, is equal to 80% by weight or equal to 90% by weight. weight.
  • the spherical equivalent diameter of the particles of mineral material is equal to 60% by weight or equal to 70% by weight.
  • the spherical equivalent diameter of the particles of mineral material is equal to 80% by weight or equal to 90% by weight.
  • the spherical equivalent diameter of the particles of mineral material for a size less than 2 ⁇ m or less than 1 ⁇ m or even less than 0.5 ⁇ m, is equal to 60% by weight or equal to 70% by weight.
  • the equivalent diameter spherical particles of mineral material for a size less than 2 pm or less than 1 pm or even less than 0.5 pm, is equal to 80% by weight or equal to 90% by weight.
  • composition according to the invention may comprise a single mineral material (b) or two or three mineral materials (b).
  • composition according to the invention comprises one or two inorganic materials (b).
  • the mineral material (b) is synthetic or of natural origin. More preferably, it is chosen from alkaline earth metal carbonates, preferably calcium carbonate (natural calcium carbonate or precipitated calcium carbonate), strontium carbonate, magnesium carbonate, barium carbonate, dolomite, kaolin, titanium dioxide, talc, lime, calcium sulphate, barium sulphate, silicas.
  • alkaline earth metal carbonates preferably calcium carbonate (natural calcium carbonate or precipitated calcium carbonate), strontium carbonate, magnesium carbonate, barium carbonate, dolomite, kaolin, titanium dioxide, talc, lime, calcium sulphate, barium sulphate, silicas.
  • the mineral material (b) is calcium carbonate (natural calcium carbonate or precipitated calcium carbonate) or kaolin or combinations thereof.
  • the composition according to the invention comprises at least one binding agent (c).
  • the binding agent (c) is a natural binder such as starch, carboxymethyl cellulose (CMC), hydroxyethyl celluloses, polyvinyl alcohol (PV-OH), casein, proteins, alginates .
  • the binding agent (c) is a synthetic binder agent such as a latex, preferably chosen from a styrene-butadiene polymer, a styrene-acrylic polymer, a styrene-acetate polymer, more preferably a styrene-butadiene polymer.
  • the binding agent (c) is a combination of at least one natural binder and at least one synthetic binder.
  • composition according to the invention comprises:
  • binding agent (c) from 2 to 25% by weight of binding agent (c) and
  • composition according to the invention may also comprise at least one adjuvant, in particular at least one adjuvant chosen from dispersing agents, defoamers, biocides, coloring agents, lubricating agents and optical brighteners.
  • adjuvant chosen from dispersing agents, defoamers, biocides, coloring agents, lubricating agents and optical brighteners.
  • the composition according to the invention has several advantageous properties for the preparation of papermaking coatings. These properties are particularly effective for the preparation of paper or cardboard.
  • the invention also provides a method of preparing paper or board comprising the use of an aqueous composition according to the invention.
  • this composition is implemented during one or more paper or paperboard coating steps.
  • the papermaking coatings prepared according to the invention are particularly advantageous when preparing a primary coating layer (pre-coat) or when preparing a final coating layer of paper (topcoat) or even of a single layer.
  • the water retention of the composition during the coating of the paper is improved.
  • the water retention of the composition is improved by 50 to 400% by volume relative to the absence of copolymer (a).
  • the viscosity of the composition is controlled thanks to the properties of the copolymer (a).
  • the method according to the invention comprises the use of a composition according to the invention which has a low shear viscosity (Brookfield viscosity at 100 rev / min) sufficient and compatible for the coating process and greater than that of the composition in the absence of copolymer. More preferably, the low shear viscosity (Brookfield viscosity at 100 rpm) is from 150 to 3500 mPa.s.
  • the composition is deposited on the surface of the paper or cardboard during at least one coating step with a removal after drying from 5 to 50 g / m 2 , more preferably from 8 to 40 g / m 2 .
  • the removal can be provided by a coating method with a blade or pencil, a film transfer press, an air knife, a gluing press or a curtain coating.
  • the dry extract of the synthesized products is measured. 1 g of product is placed in the oven for 1 hour. The mass difference before and after drying makes it possible to determine the dry extract.
  • glass beaker type 136.43 g of monomer (a-1) are weighed in the proportions shown in Table 1 and 204.99 g of ethyl acrylate (a2).
  • glass beaker type weigh 1.0 g of ammonium persulfate which is dissolved in 10 g of deionized water.
  • disposable syringe type weigh 7.5 g of sodium salt of 2-acrylamido-2-methylpropanesulfonic acid (a3) to 50% by weight in water.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P1) containing 28.4% by weight of dry extract the composition of which is detailed in Table 1.
  • an initial charge consisting of 440 g of deionized water, 3.45 g of sodium dodecyl sulfate and 0.43 g of sodium bicarbonate is introduced.
  • glass beaker type weigh 116 g of monomer (a-1) in the proportions shown in Table 1, 198 g of ethyl acrylate (a2), 1.12 g of sodium dodecyl sulfate, 0.14 g of sodium bicarbonate and 150 g of deionized water.
  • glass beaker type weigh 1.0 g of ammonium persulfate which is dissolved in 10 g of deionized water.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P2) at 32.7% by weight of dry extract is obtained, the composition of which is detailed in Table 1.
  • glass beaker type weigh 116 g of monomer (a-1) in the proportions shown in Table 1, 198 g of ethyl acrylate (a2), 1.12 g of sodium dodecyl sulfate and 150 g of deionized water.
  • glass beaker type weigh 1.0 g of ammonium persulfate which is dissolved in 10 g of deionized water.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the four containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P3) at 32.5% by weight of dry extract is obtained, the composition of which is detailed in Table 1.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P5) containing 31.7% by weight of solids is obtained, the composition of which is detailed in Table 1.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P6) containing 30.1% by weight of solids is obtained, the composition of which is detailed in Table 1.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P7) at 30.1% by weight of dry extract is obtained, the composition of which is detailed in Table 1.
  • a fourth container of the disposable syringe type, 5.28 g of sodium salt of 2-acrylamido-2-methylpropanesulphonic acid (a3) at 50% by weight in water is weighed. The reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a copolymer (P8) containing 30.4% by weight of solids is obtained, the composition of which is detailed in Table 1.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 3 containers are introduced into the polymerization reactor.
  • the reaction medium is then maintained at 76 ° C. ⁇ 2 ° C. for 2 hours.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 3 containers are introduced into the polymerization reactor.
  • the reaction medium is then maintained at 76 ° C. ⁇ 2 ° C. for 2 hours.
  • 116.04 g of monomer (a-2) are weighed in the proportions shown in Table 2, 198.55 g of ethyl acrylate (a2), 1.12 g. of sodium dodecyl sulfate and 161.01 g of deionized water.
  • the reactor contents are heated to a temperature of 76 ° C ⁇ 2 ° C.
  • the reagents of the 4 containers are introduced into the polymerization reactor at a temperature of 76 ° C. ⁇ 2 ° C.
  • a comparative copolymer (PC3) at 31.0% by weight of dry extract is obtained, the composition of which is detailed in Table 2.
  • pigment CaC0 3 as mineral material: Hydrocarb 60, Hydrocarb 90 or Hydrocarb 95 (Omya) products, 78% by weight in water,
  • binding agent latex DL 1066 (Trinseo), 55% by weight in water,
  • binding agent Starch Stabilys A30 (Rocket), 25% by weight in water, polyvinyl alcohol as optical azurizing activator:
  • the dry extract of paper coating coatings is measured dry using a CEM brand microwave scale. We put on a sandpaper a mass determined between 1 and 4 g of coating color. Then, the balance dries this mass by microwaves. The scale stops drying when the weight no longer varies for 10 s. The difference in weight is expressed in% which determines the dry extract.
  • the pH is measured at 25 ° C using a WTW brand pH meter equipped with a conventional electrode coupled to a temperature probe.
  • the Brookfield viscosity of the compositions prepared at 100 rpm and 25 ° C. is measured.
  • the mobile is chosen according to the viscosity of the composition considered to be in the optimal range of the rheometer.
  • the ACAV capillary viscosity at 10 6 s 1 is measured by means of an ACA A2 ACA capillary viscometer.
  • Water retention is determined by an AAGWR Gradek device. It includes a measuring chamber in which a test paper (Test Blotter Paper Gradek) is placed, covered by a perforated plastic cloth (Test Filter PCTE Gradek - 2 pm). 10 mL of coating color are then introduced into the chamber.
  • the apparatus AAGWR allows to exert a pressure (1,5 bar) on the coating sauce, driving all or part of the water and water-soluble substances contained in the sauce to cross the perforated plastic cloth and to migrate in the paper test. A pressure of 1.5 bar is applied for 90 s.
  • the difference between the test paper weight before the measurement (PO) and after the measurement (Pl) gives the amount of water and water-soluble substances in the coating that migrated into the test paper during the measurement.
  • the relative value of increase in water retention is 1250 x (P 1 - PO) / PO.
  • the presence of the polymer (P1) in a small amount in the composition (C1) according to the invention makes it possible to control the viscosity at high shear rate as well as low shear rate viscosity.
  • the polymer (P1) also provides good water retention to the paper coating sauce.
  • the presence of the polymers (P2) and (P3) also makes it possible to improve these properties.
  • the presence of the polymers (P6) and (P7) also makes it possible to provide good properties.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Paper (AREA)
EP18833952.7A 2017-12-18 2018-12-17 Composition pour sauce de couchage papetière Pending EP3728734A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1762325A FR3075230B1 (fr) 2017-12-18 2017-12-18 Composition pour sauce de couchage papetiere
PCT/FR2018/053317 WO2019122640A1 (fr) 2017-12-18 2018-12-17 Composition pour sauce de couchage papetière

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EP3728734A1 true EP3728734A1 (fr) 2020-10-28

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EP (1) EP3728734A1 (zh)
CN (1) CN111417755B (zh)
BR (1) BR112020008107B1 (zh)
FR (1) FR3075230B1 (zh)
WO (1) WO2019122640A1 (zh)

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CN112538169B (zh) * 2020-12-30 2023-12-29 杭州诺莘科技有限责任公司 同时含有负电荷及疏水基团的聚合物超分子体系及其应用

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2796403B1 (fr) 1999-07-16 2001-09-28 Coatex Sa Nouvel agent de retention d'eau hydrosoluble en milieu neutre ou alcalin de type copolymere vinylique-acrylique, applications aux sauces de couchage pour papier et carton, et sauces de couchage et papiers et cartons ainsi obtenus
US20040151886A1 (en) * 2000-03-06 2004-08-05 Bobsein Barrett Richard Binder composition
FR2894998A1 (fr) * 2005-12-16 2007-06-22 Coatex Sas Procede de fabrication de sauces de couchage a la retention d'eau et a la viscosite brookfield ameliorees mettant en oeuvre un polymere peigne avec au moins une fonction greffee oxyde de polyalkylene.
US8969261B2 (en) 2010-02-12 2015-03-03 Rhodia Operations Rheology modifier compositions and methods of use
FR2958664B1 (fr) * 2010-04-07 2012-10-26 Coatex Sas Utilisation d'un latex de styrene et de taille de 100 nm comme agent rheologique dans une sauce de couchage papetiere, sauce et son procede d'obtention
FR2961815B1 (fr) * 2010-06-25 2013-05-10 Coatex Sas Emulsions acryliques alkali gonflables a l'acide acrylique, leur utilisation dans des formulations aqueuses et formulations les contenant.
FR2961816B1 (fr) * 2010-06-25 2012-07-06 Coatex Sas Emulsions acryliques alkali gonflables sans tensio-actif, leur utilisation dans des formulations aqueuses et formulations les contenant.

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BR112020008107A2 (pt) 2020-11-03
WO2019122640A1 (fr) 2019-06-27
FR3075230A1 (fr) 2019-06-21
US11661705B2 (en) 2023-05-30
FR3075230B1 (fr) 2020-05-22
BR112020008107B1 (pt) 2024-02-15
CN111417755A (zh) 2020-07-14
US20200370245A1 (en) 2020-11-26
CN111417755B (zh) 2022-08-30

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