WO2017216767A1 - Compositions de revêtement micro-poreuses - Google Patents

Compositions de revêtement micro-poreuses Download PDF

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Publication number
WO2017216767A1
WO2017216767A1 PCT/IB2017/053593 IB2017053593W WO2017216767A1 WO 2017216767 A1 WO2017216767 A1 WO 2017216767A1 IB 2017053593 W IB2017053593 W IB 2017053593W WO 2017216767 A1 WO2017216767 A1 WO 2017216767A1
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Prior art keywords
micro
coating composition
porous coating
porous
recording medium
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PCT/IB2017/053593
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English (en)
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Incorporated Hercules
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HICKMAN, Stuart Roy
Lu, Yong
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Publication of WO2017216767A1 publication Critical patent/WO2017216767A1/fr

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    • 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

Definitions

  • the presently disclosed process(es), procedure(s), method(s), product(s), result(s), and/or concept(s) relate generally to a micro-porous coating composition. Additionally, the present disclosure relates generally to a substrate coated with the composition and its use in inkjet printers.
  • An inkjet printer has become highly popular due to its high performance, and ability to produce images comparable to those of a conventional silver halide
  • aqueous inks which contain a high amount of water and other solvents, are typically used.
  • the inkjet printer normally uses inkjet recording media comprising a porous image-receiving layer that is absorbent to the ink. This porous image-receiving layer is designed to absorb the liquid component in the ink quickly to reduce drying time.
  • micro-porous inkjet recording media are widely used today for producing high quality images with fast print-speed and rapid dry-time.
  • Polymer dispersions used as binders in dispersion paints, consist of particles finely distributed in a liquid carrier such as water and/or organic solvent(s).
  • Coalescing agents are generally used in dispersion paints for optimizing a film formation process for the polymeric binder particles.
  • the film formation process involves evaporation of the liquid carrier and formation of a continuous polymer film as well as the coalescence of the polymeric binder particles during and after the evaporation of the liquid carrier (e.g. , water), thereby permitting contact and fusion of adjacent polymeric dispersion particles.
  • the coalescing agents can reduce the formation temperature and as a consequence can optimize film coherence and properties such as scrub resistance, mechanical properties as well as appearance.
  • the outer, aqueous phase of the inkjet fluid is separated from the internal phase by both capillary action onto the hydrophilic media surface, and by evaporation, leaving the relatively high-viscosity internal phase of the dispersion which coalesces to give a smooth sharp print image on the printing media.
  • a coalescing agent such as boric acid or sodium borate (SVHC), which is toxic.
  • the designated value may vary by plus or minus twelve percent, or eleven percent, or ten percent, or nine percent, or eight percent, or seven percent, or six percent, or five percent, or four percent, or three percent, or two percent, or one percent.
  • the use of the term "at least one” will be understood to include one as well as any quantity more than one, including but not limited to, 1 , 2, 3, 4, 5, 10, 15, 20, 30, 40, 50, 100, etc.
  • the term "at least one” may extend up to 100 or 1000 or more depending on the term to which it is attached. In addition, the quantities of 100/1000 are not to be considered limiting as lower or higher limits may also produce satisfactory results.
  • the words “comprising” (and any form of comprising, such as “comprise” and “comprises”), “having” (and any form of having, such as “have” and “has”), “including” (and any form of including, such as “includes” and “include”) or “containing” (and any form of containing, such as “contains” and “contain”) are inclusive or open-ended and do not exclude additional, unrecited elements or method steps.
  • the terms “or combinations thereof and “and/or combinations thereof” as used herein refer to all permutations and combinations of the listed items preceding the term.
  • A, B, C, or combinations thereof is intended to include at least one of: A, B, C, AB, AC, BC, or ABC and, if order is important in a particular context, also BA, CA, CB, CBA, BCA, ACB, BAC, or CAB.
  • expressly included are combinations that contain repeats of one or more items or terms, such as BB, AAA, AAB, BBC, AAABCCCC, CBBAAA, CABABB, and so forth.
  • BB BB
  • AAA AAA
  • AAB BBC
  • AAABCCCCCC CBBAAA
  • CABABB CABABB
  • the term "substantially” means that the subsequently described circumstance completely occurs or that the subsequently described circumstance occurs to a great extent or degree.
  • coalescing agent is understood in a broad sense, in particular covering the functions of solvent, co-solvent, crystallization inhibitor and stripping agent.
  • the term coalescing agent may especially denote a product that is liquid at the usage temperature, which may contribute to rendering a solid substance liquid, or to preventing or retarding the solidification or the crystallization of material in a liquid medium.
  • binder refers to a compound that helps facilitate adherence of a micro-porous coating composition to a substrate.
  • binder and binder latex may be interchangeably used in the present disclosure.
  • pigment refers to insoluble particles that remain suspended or dispersed when introduced into a coating composition.
  • wetting agent refers to anionic, cationic, and nonionic surfactants.
  • gloss refers generally to the amount of light reflected by an object's surface, such as an inkjet media surface. Gloss can be quantified, as is common in the art, and is measured relative to specific specular angles from an object surface. The specular angle is the angle equal to but opposite the angle of incidence. This specular light is responsible for the highlights visible on shiny materials. When quantifying specular gloss, it can be measured at angles of 20°, 45°, 60°, and 85° from the normal. In the present disclosure gloss is measured at 60° according to ASTM D523 using a Tri-Glossmaster (Sheen Instruments)
  • the present disclosure relates to a micro-porous coating composition
  • a micro-porous coating composition comprising: a) a coalescing agent; b) a binder; and c) a crosslinking agent.
  • the coalescing agent can be an esteramide compound and/or a glycol ether compound.
  • the micro-porous coating composition is suitable for coating onto a substrate.
  • esteramide compound may be represented by the general formula (I)
  • R 1 OOC-M-CONR 2 R 3 (I) where R 1 is a saturated or unsaturated, linear or branched, optionally cyclic, or optionally aromatic, hydrocarbon-based radical, having from 1 to 36 carbon atoms; R 2 and R 3 are identical or different radicals and each is independently selected from saturated or unsaturated, linear or branched, optionally cyclic, optionally aromatic, or optionally substituted, hydrocarbon-based radicals, having from 1 to 36 carbon atoms, with the proviso that R 2 and R 3 optionally form a ring member that is optionally substituted or that optionally contains a heteroatom; and M is a linear or a branched divalent alkyl radical having from 2 to 12 carbon atoms.
  • R 1 , R 2 and R 3 may be identical or different radicals independently selected from the group consisting of C 1 -C 12 alkyl, aryl, alkylaryl, and arylalkyl radicals; and R 2 or R 3 is optionally substituted.
  • R 1 may be selected from the group consisting of methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, n-pentyl, isopentyl, isoamyl, n-hexyl, cyclohexyl, 2-ethylbutyl, n-octyl, isooctyl, 2-ethylhexyl, and tridecyl radicals.
  • R 2 and R 3 may be identical or different and independently selected from the group consisting of methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, n-pentyl, amyl, isoamyl, hexyl, cyclohexyl, hydroxyethyl, morpholine, piperazine and piperidine radicals.
  • the esteramide compound may be selected from the group consisting of CH 3 — CH 2 — CH 2 — CH 2 — CH(CH 2 CH 3 )— CH 2 — OOC— CONMe 2 , CH 3 — (CH 2 )1 -1 1— OOC— CONMe 2 , and
  • the esteramide compound is selected from the group consisting of methyl-5-(dimethylamino)-2-methyl-5-oxopentanoate, methyl 2- (dimethylamino)-2-oxoacetate, ethyl 2-(dimethylamino)-2-oxoacetate, 2-ethyl-hexyl 2- (dimethylamino)-2-oxoacetate, (n-decyl 2-(dimethylamino)-2-oxoacetate, and cyclohexyl 2-(dimethylamino)-2-oxoacetate, and combinations thereof.
  • esteramide compounds are disclosed in U.S. Pat. No. 8735324B2, which is hereby incorporated by reference herein in its entirety.
  • glycol ether compound can be represented by a general formula (I I)
  • R 4 is a CrC 6 aliphatic or aromatic group
  • R 5 is H, CH 3 , or C 2 H 5
  • n has a value of at least 1
  • A comprises at least one of an ester, an amide, a hydroxyl and an ether.
  • the value of n may be 1 , 2, 3 or 4, or the value of n may be 1 , 2 or 3.
  • the exemplary glycol ethers can include, but are not limited to, Ci-C 6 alkylene glycol ethers such as propylene glycol butyl ether, dipropylene glycol propyl ether, ethylene glycol butyl ether, diethylene glycol propyl ether, and triethylene glycol methyl ether.
  • glycol ethers are commercially available under the name Dowanol® from The Dow Chemical Company.
  • n-propoxypropanol is available under the name Dowanol® PnP.
  • exemplary derivatives of glycol ethers include those glycol ethers modified to include an additional group or functionality such as an ester group.
  • the glycol ether compound may be selected from the group consisting of propylene glycol butyl ether, dipropylene glycol methyl ether, dipropylene glycol propyl ether, ethylene glycol butyl ether, diethylene glycol propyl ether, triethylene glycol methyl ether, and combinations thereof.
  • the glycol ether may be an aromatic glycol ether such as ethylene glycol phenyl ether.
  • the glycol ether compound may be selected from the group consisting of propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, dipropylene glycol monomethyl ether acetate, dipropylene glycol monoethyl ether acetate, 3-methoxybutanol acetate, tetrahydrofurfuryl acetate, cyclohexanol acetate, and combinations thereof.
  • glycol ether compounds are disclosed in U.S. Pat. No 7879785B2, which is hereby incorporated by reference herein in its entirety.
  • binders can include polymers or resin, such as, without limitation, water-soluble or water-dispersible film-forming polymers and/or latex polymers such as cellulose derivatives (for instance selected from hydroxyethyl cellulose, methyl cellulose and carboxy methyl cellulose), casein, gelatin, protein, starch (e.g. oxidized, esterified, or other modified types of starch), gum arabic, polyethylene glycol, polypropylene glycol, vinyl polymers (e.g.
  • polyvinyl alcohol polymers and copolymers of vinyl pyrrolidine (PVP), polymers and copolymers of vinyl acetate (including ethylene vinyl acetate), styrene butadiene and derivatives (including styrene butadiene rubbers (SBR)), styrene maleic anhydride (SMA), styrene acrylonitrile (SAN)), acrylic polymers and lattices of acrylic polymers (including acrylates and methacrylates, such as acrylate and methacrylate esters (for instance polymethyl methacrylate) and styrene-acrylic esters), polyesters, polycarbonate polymers, polyamides, polyimides, epoxy polymers, phenolic polymers, polyolefins, polyacrylamide, polyketone resins, polyurethane copolymers, and mixtures thereof.
  • the binder is preferably not a fluoropolymer.
  • the composition may also comprise a UV-curable binder, typically in low concentrations.
  • the binder may be modified to obtain desired coating characteristics, such as flexibility and durability.
  • a UV-cured binder can be employed for increased durability, while a flexible, solvent-based polymer system, such as
  • the crosslinking agents may be organic or inorganic materials.
  • the crosslinking agents may be organic materials selected from, for instance, glyoxal, glutaralaldehyde, 2,3-dihydroxy-1 ,4-dioxane, sodium bisulfate complex, bis(vinyl) sulfone, bis(vinyl) sulfone methyl ether, adipoyl dihydrazide, epichlorohydrin polyamide resins, urea-formaldehyde resins, epoxy compounds, polyepoxy compounds, aziridines, polyaziridines, melamine/formaldehyde, oxazolines, triazines,
  • examples of the inorganic crosslinking agents can include, but are not limited to, ammonium zirconium carbonate, a borate, zinc oxides, zinc ammonium carbonate, zirconium carbonate, etc.
  • Polyaziridines can be derived from aziridines which are trifunctional amine compounds which may be derived from ethyleneimine.
  • Examples of commercially available polyaziridine include NeoCryl® CX 100 commercially available from DSM Coating Resins LLC and XAMA® 7 commercially available from lchemco srl.
  • An example of a commercially available carbodimide crosslinking agent is UCARLINK XL- 29SE from Angus Chemical Co.
  • epoxy compounds can also be used as crosslinking agents.
  • examples can include, but are not limited to, epoxy modified bisphenol A and epichlorohydrin epoxy resins.
  • Aliphatic and aromatic polyisocyanates may be used as crosslinking agents in the coating compositions.
  • crosslinking agents are commercially available from Bayer under Desmodur®.
  • Desmodur® N3300 is an aliphatic hexamethylene diisocyanate
  • Desmodur® CB-75N is an oligomeric toluene diisocyanate.
  • Melamine formaldehyde resins are also useful crosslinking agents.
  • An example of commercially available melamine formaldehyde is Cymel® 303 from Cytec.
  • a micro-porous coating composition can further comprise inorganic or organic particles, suitably bonded together by binder.
  • the amount of particles in this type of coating is often far above the critical particle volume concentration, which results in high porosity in the coating.
  • the micro-porous coating composition may comprise from about 20% to about 100% of particles and from about 1 % to about 80% of binder, or from about 80% to about 95% of particles and from about 20% to about 5% of binder. These amounts refer to the weight % of the particles or binder by weight of the total combined weight of the particles and binder.
  • the particles may be in granular form or incorporated into the composition in the form of a dispersion. The particles may be dispersed into the composition using any conventional method.
  • the average particle size of the particles in the composition is from about 1 nanometer to about 1 .5 microns, preferably no more than about 500 nm, preferably no more than about 250 nm, and typically at least about 10 nm, and typically from about 50 nm to about 200 nm.
  • the particles are selected from about 1 nanometer to about 1 .5 microns, preferably no more than about 500 nm, preferably no more than about 250 nm, and typically at least about 10 nm, and typically from about 50 nm to about 200 nm.
  • the term "average particle size" refers to the D 50 parameter, which is well-known in the art.
  • the D 50 is suitably a volume parameter, i.e. a D (v ,50)-
  • the method of establishing the D 50 is preferably by laser diffraction (Fraunhofer diffraction), for instance using a Mastersizer 3000 (Malvern).
  • the particles can be pigment particles.
  • inorganic particles include, but are not limited to, silica including porous silica, synthetic amorphous silica, precipitated silica, fumed silica, colloidal silica and silica gels such as silica hydrogels, aerogels, xerogels, and cogels; alumina including porous alumina, fumed alumina, colloidal alumina, pseudo-boehmite, aluminum hydroxide and modified alumina; titanium dioxide; clay; kaolin; talc; glass beads; calcium carbonate (including precipitated calcium carbonate and ground calcium carbonate); calcium sulfate; barium sulfate; zinc oxide; zinc sulfide; zinc carbonate; magnesium carbonate; magnesium hydroxide; silicates, including magnesium silicate, aluminum silicate and calcium silicate; diatomaceous earth; satin white; lithopone;
  • the inorganic pigments may be non-porous or porous. Inorganic particles having pore volumes of 0.6 cc/g or above can be used, or pore volumes of 0.6 to 3.00 cc/g can be used.
  • organic pigments can include, but are not limited to, crosslinked styrene butadiene rubber (SBR) latexes, micronized polyethylene wax, micronized polypropylene wax, polystyrene, polymethyl methacrylate,
  • SBR crosslinked styrene butadiene rubber
  • the micro-porous coating composition preferably also comprises a wetting agent.
  • a wetting agent Any suitable wetting agent conventional in the art may be used.
  • the wetting agents may be selected from hyper branched polymers, polyether-modified polysiloxanes (particularly polyether-modified polydimethylsiloxanes), ionic and nonionic (meth)acrylate copolymers, high molecular mass block copolymers containing groups having pigment affinity, dialkyl sulfosucci nates, and combinations thereof.
  • the micro-porous coating composition of the present disclosure preferably further comprises water or a mixed water-organic solvent system (for instance water and ethanol).
  • the micro-porous coating composition is preferably an aqueous micro-porous coating composition. It will be appreciated that an aqueous micro-porous coating composition is formed before applying onto the substrate.
  • the aqueous micro-porous coating composition may comprise a coalescing agent in an amount of about 0.1 -50 wt%; the binder in an amount of about 0.1 -10 wt%; and the crosslinking agent in an amount of about 0.1 -5 wt%.
  • the aqueous micro-porous coating composition may comprise a coalescing agent in an amount of 1 -30 wt%; the binder in an amount of 0.1 -7 wt%; and the crosslinking agent in an amount of 0.1 -3 wt%.
  • the aqueous micro-porous coating composition comprises a coalescing agent in an amount of 2-15 wt%; the binder in an amount of 0.1 - 4 wt%; and the crosslinking agent in an amount of 0.1 -1 wt%.
  • wt% ranges described immediately hereinabove refer to the weight % of the coalescing agent or binder or crosslinking agent by weight of the total weight of the micro-porous coating composition.
  • the micro-porous coating composition suitably comprises a solids content of from about 8 wt% to about 50 wt%, typically at least about 10 wt% and typically no more than about 40 wt% or no more than about 35 wt%, by total weight of the micro-porous coating composition.
  • the solids content of the composition is the dry weight of the final coating, i.e. the coating after the composition has been coated and dried onto a substrate (i.e. after the volatile components such as the water or a water/organic solvent system have been removed), expressed as a percentage of the total weight of the micro-porous coating composition.
  • micro-porous coating compositions of the present disclosure can be applied to any suitable substrate by any of the conventional coating techniques known to those skilled in the art.
  • a solution containing the micro-porous compositions can be coated on a surface of a substrate using a commonly known Meyer bar method, in which the solution is moved under a helically wire-wound cylindrical metal bar which remains stationary.
  • the solution can also be coated on a surface of a substrate by any other conventional coating techniques such as rod coating, dipping, gravure coating, blade coating, slide hopper coating, slot coating or curtain coating.
  • the substrate suitably comprises any material capable of forming a self- supporting opaque, or transparent, film or sheet.
  • a self-supporting film or sheet as referred to herein is meant a film or sheet capable of independent existence in the absence of a supporting base.
  • the substrate is typically a polymeric material, but may alternatively comprise paper, cardboard or other similar materials.
  • the paper can be an uncoated raw paper or a pre-coated paper.
  • the raw paper may be manufactured from cellulose fibers. More specifically, the raw paper may be produced from chemical pulp, mechanical pulp, thermal mechanical pulp and/or the combination of chemical and mechanical pulp.
  • the raw paper may also include conventional additives such as internal sizing agents and fillers.
  • the sizing agents are added to the pulp before it is converted into a paper web or substrate. They may be chosen from conventional internal sizing agents for printing papers.
  • the fillers may be any particular types used in conventional paper making. As non-limiting examples, the fillers may be selected from calcium carbonate, talc, clay, kaolin, titanium dioxide and combinations thereof.
  • pre-coated paper examples include, but are not limited to, inorganic pigment-coated papers and resin-coated papers.
  • the resin coatings on resin-coated papers may be formed from polyethylene, polypropylene, polyethylene terephthalate, or other extrudable polymers. Such resin-coated papers are widely used for photographic printing.
  • Suitable polymeric materials for the substrate include thermoplastics materials, for instance including a cellulose ester, e.g. cellulose acetate; polystyrene; a polymer or copolymer of vinyl chloride; polysulphone; a homopolymer or copolymer of a 1 -olefin, such as ethylene, propylene and buty-1 -ene; a polyamide; a polycarbonate; and, particularly, a synthetic linear polyester which may be obtained by condensing one or more dicarboxylic acids or their lower alkyl (up to 6 carbon atoms) diesters, e.g.
  • terephthalic acid isophthalic acid, phthalic acid, 2,5- 2,6- or 2,7-naphthalenedicarboxylic acid, succinic acid, sebacic acid, adipic acid, azelaic acid, 4,4'-diphenyldicarboxylic acid, hexahydroterephthalic acid or 1 ,2-bis-p-carboxyphenoxyethane (optionally with a monocarboxylic acid, such as pivalic acid) with one or more glycols, particularly an aliphatic glycol, e.g. ethylene glycol, 1 ,3-propanediol, 1 ,4-butanediol, neopentyl glycol and 1 ,4-cyclohexanedimethanol.
  • aliphatic glycol e.g. ethylene glycol, 1 ,3-propanediol, 1 ,4-butanediol, neopentyl glyco
  • thermoplastic polymeric materials which are suitable substrates include polyethylene, high density polyethylene, low density polyethylene, polypropylene, polyvinyl chloride), saran, polystyrene, high impact polystyrene, nylons, polyesters such as poly(ethylene terephthalate), copolymers of ethylene and acrylic acid, copolymers of ethylene and methacrylic acid, and mixtures thereof. If desired, all or a portion of the carboxyl groups of carboxyl-containing copolymers can be
  • a non-limiting example of a metalized thermoplastic polymeric material is aluminized poly(ethylene terephthalate).
  • Polyester (typically polyethylene terephthalate) film is used as the substrate, especially such a film which has been biaxially oriented by sequential stretching in two mutually perpendicular directions, typically at a temperature in a range of 70 to 125° C , and preferably heat set, typically at a temperature in a range of 150 to 200° C, for example as described in GB-A-838708, which is hereby incorporated by reference herein in its entirety.
  • Suitable polymeric materials for the substrate also include thermoset resin materials, for instance including addition-polymerization resins such as acrylics, vinyls, bis-maleimides and unsaturated polyesters: formaldehyde condensate resins such as condensates with urea, melamine or phenols; cyanate resins; functionalized polyesters; polyamides or polyimides.
  • addition-polymerization resins such as acrylics, vinyls, bis-maleimides and unsaturated polyesters: formaldehyde condensate resins such as condensates with urea, melamine or phenols; cyanate resins; functionalized polyesters; polyamides or polyimides.
  • the substrate is substantially non-porous.
  • a substantially non-porous substrate may be selected from polyvinyl chloride, propylene or oriented propylene.
  • the substrate suitably has a thickness in a range of 25 to 300 pm, or in a range of 50 to 175 pm, or in a range of 75 to 130 pm.
  • a printable recording medium comprising a substrate and a porous image-receiving layer wherein said porous image-receiving layer is a layer derived from a coating composition as described hereinabove.
  • the printable recording medium is an inkjet recording medium.
  • micro-porous coating composition described hereinabove as a porous image- receiving layer in a printable recording medium comprising said porous image-receiving layer disposed on a substrate, particularly wherein said printable recording medium is an inkjet recording medium, and particularly when said inkjet recording medium is suitable for producing glossy images.
  • the use of the micro-porous coating composition described hereinabove for improving the gloss of a printable recording medium comprising a porous image-receiving layer disposed on a substrate, particularly wherein said printable recording medium is an inkjet recording medium, and particularly for improving the gloss of an image printed on said porous image-receiving layer of said printable recording medium, wherein said porous image-receiving layer comprises or is derived from said micro-porous coating composition.
  • the term "improving the gloss” refers to the improvement in gloss provided by the micro-porous coating composition described herein, relative to a coating composition of the prior art.
  • micro-porous coating composition for improving the processability of an printable recording medium comprising a porous image-receiving layer disposed on a substrate, particularly wherein said printable recording medium is an inkjet recording medium, wherein said porous image-receiving layer comprises or is derived from said micro-porous coating composition.
  • said printable recording medium is an inkjet recording medium
  • said porous image-receiving layer comprises or is derived from said micro-porous coating composition.
  • improving the processability refers to the improvement in print speed and/or ink drying time provided by the micro-porous coating composition described herein, relative to a coating composition of the prior art.
  • a method for improving the gloss of a printable recording medium comprising a porous image-receiving layer disposed on a substrate, particularly wherein said printable recording medium is an inkjet recording medium, and particularly for improving the gloss of an image printed on said porous image-receiving layer of said printable recording medium, and/or improving the processability of said printable recording medium.
  • the method comprises providing said porous image-receiving layer as a porous image- receiving layer which comprises or is derived from the micro-porous coating
  • the micro-porous coating composition is coated onto the substrate such that the dry coat weight of the coating may be no more than 50 g/m 2 , or no more than 40 g/m 2 , or no more than 35 g/m 2 , or no more than 20 g/m 2 , or no more than 15 g/m 2 .
  • the dry coat weight may be from 10 to 30 g/m 2 , or from 12 to 15 g/m 2 .
  • the term "dry coat weight" refers to the amount of coating composition per unit area of the finished coated substrate, i.e. preferably the inkjet recording medium comprising a porous image-receiving layer on a printable substrate wherein the porous image-receiving layer is derived from the micro-porous coating composition.
  • the substrate may be coated at ambient temperature, for instance from about 18-19 °C to about 40 °C.
  • the coating is typically conducted at a speed of at least 1 meter per minute, or in a range of 10 to 250 meters per minute, or in a range of 20 to 200 meters per minute.
  • the coating is optionally dried at a temperature of about 40 to about 220 °C, or about 60 to about 180 °C, or about 80 to about 120 °C.
  • the drying time depends on the drying temperatures and can be varied form about 1 to about 30,000 seconds, or from about 5 to about 1000 seconds, or from about 10 to about 60 seconds.
  • the coated substrate is particularly suitable for use as an image-receiving medium, particularly an inkjet recording medium, particularly wherein the ink is a water- based ink.
  • the performance of the coated substrate as an image-receiving medium is preferably assessed by taking gloss measurements, as is conventional in the art, preferably 60° gloss measurements.
  • gloss readings are taken in the non- imaged areas and also in the secondary colors (red, green, blue) of imaged areas.
  • Samples 1 -6 were prepared by mixing the ingredients listed in the tables as shown below. Sample 1
  • Rhodiasolv® Polarclean - commercially available from Solvay
  • Samples 1 -6 were wet-coated on oriented polypropylene (OPP),
  • the micro-porous coating composition provides good gloss levels and ink absorption.

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Abstract

La présente invention concerne une composition pour former un revêtement micro-poreux brillant sur un substrat, la composition comprenant un agent de coalescence, un liant; un agent de réticulation. L'invention concerne également un support d'enregistrement imprimable, en particulier un support d'enregistrement à jet d'encre, comprenant un substrat et une couche de réception d'image, ladite couche de réception d'image étant une couche dérivée d'une telle composition de revêtement.
PCT/IB2017/053593 2016-06-17 2017-06-16 Compositions de revêtement micro-poreuses WO2017216767A1 (fr)

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GBGB1610602.3A GB201610602D0 (en) 2016-06-17 2016-06-17 Micro-porous coating compositions
GB1610602.3 2016-06-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110205868A (zh) * 2019-07-22 2019-09-06 玉溪接装纸制造有限公司 一种镀铝型接装纸用防脱落、防粘连光油及其制备方法
WO2020038496A3 (fr) * 2019-11-06 2020-07-16 Rhodia Operations Composition pour la terminaison immédiate d'une polymérisation radicalaire et ses utilisations
CN113039252A (zh) * 2018-09-13 2021-06-25 艾利丹尼森公司 用于图形的通用可印刷面涂层

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