WO2002074549A1 - Composition de revetement pour support d'impression a jet d'encre et support d'impression a jet d'encre - Google Patents
Composition de revetement pour support d'impression a jet d'encre et support d'impression a jet d'encre Download PDFInfo
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- WO2002074549A1 WO2002074549A1 PCT/JP2002/002558 JP0202558W WO02074549A1 WO 2002074549 A1 WO2002074549 A1 WO 2002074549A1 JP 0202558 W JP0202558 W JP 0202558W WO 02074549 A1 WO02074549 A1 WO 02074549A1
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- jet recording
- recording medium
- ink
- ink jet
- coating composition
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Classifications
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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
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
- C09D201/02—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups
- C09D201/10—Coating compositions based on unspecified macromolecular compounds characterised by the presence of specified groups, e.g. terminal or pendant functional groups containing hydrolysable silane groups
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/502—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording characterised by structural details, e.g. multilayer materials
- B41M5/506—Intermediate layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/529—Macromolecular coatings characterised by the use of fluorine- or silicon-containing organic compounds
Definitions
- the present invention relates to a coating composition for a recording medium used for ink jet printing corresponding to a high gloss photographic image, and more particularly, to a cast layer formed for imparting gloss to an ink fixing layer. It relates to the coating composition used.
- the present invention also relates to an ink jet recording medium coated with such a coating composition.
- the ink jet recording medium coated with the composition of the present invention is excellent in that it has high gloss, weather resistance, ability to follow a change in stress due to bending, and high ink receptivity.
- the image formation and fixing mechanism of the inkjet recording medium is such that anionic ink is printed on a base material containing a cationic drug or pigment, and the ink is fixed by aggregation of the anionic component and the cationic component. Is common.
- glossy gloss the glossy layer applied on the ink fixing layer containing the cationic component has fine pores and cracks, and the ink penetrates the ink to form an image by the action between the ink fixing layer below and the ink.
- Japanese Patent Application Laid-Open No. 7-149038 discloses that a polymer containing a pigment such as colloidal silica is applied to a polymer having a glass transition point (T g) of 40 ° C. or higher, which is obtained by polymerizing a monomer having an ethylenically unsaturated bond. Applying a surface gloss treatment by cast coating at a temperature below the glass transition point in a state where the polymer does not completely form a film, and forming a layer with poor film formation with gloss on the paper surface It has been proposed to promote the penetration of ink and transport the ink to the ink-depositing layer below it.
- T g glass transition point
- the glass transition point The glossy layer is very brittle because it is higher than room temperature (more than 40 ° C) and it actively causes film formation defects.
- room temperature more than 40 ° C
- this inkjet paper is rolled or folded, a large number of glossy layers can easily be formed. Problems such as cracks were observed.
- an ink jet gloss layer is formed by using a water-soluble resin having a relatively good film formation as an adhesive and mixing a large amount of pigment to deteriorate the film formation.
- Resins have problems with water resistance, Tg cannot be changed freely like monomers having ethylenically unsaturated bonds, so there is little design freedom, and water-soluble resins are low Problems such as being unsuitable for high-concentration and high-concentration paint formulations were observed.
- a radically polymerizable unsaturated monomer having a silyl group (A) and another copolymerizable radically polymerizable unsaturated monomer (B) are used in the presence of a radically polymerizable surfactant. It has been found that the above-mentioned problems can be solved by using a composition comprising a synthetic resin emulsion having two or more different glass transition points, which are simultaneously or separately emulsion-polymerized and having different glass transition points, and colloidal silica for the gloss layer.
- the surfactant does not bleed out on the film surface, does not adversely affect the ink permeability, and has a silyl group-containing radically polymerizable surfactant. Scratch resistance of the film surface is improved by copolymerization of the saturated monomer (A). Furthermore, a synthetic resin component having a high glass transition point, which easily forms a discontinuous film, exhibits high ink permeability, and a component of a synthetic resin having a low Tg that generates a uniform film improves gloss, In addition, the ability to follow a change in stress due to bending can be improved, and the brittleness of the film can be improved.
- a synthetic resin obtained by polymerizing a monomer having a radical polymerizable unsaturated bond can freely design Tg, can design an arbitrary temperature, and perform a polymerization reaction under various conditions. It is possible to obtain a synthetic resin emulsion with a T g curve with an inflection point.
- the present invention provides a method for preparing a radically polymerizable unsaturated monomer having a silyl group (A) and another copolymerizable radically polymerizable unsaturated monomer (B) in the presence of a radically polymerizable surfactant.
- Coating composition for ink jet recording media comprising synthetic resin emulsion having two or more different glass point transition points (Tg) obtained by emulsion polymerization and colloidal silica, and such coating composition for ink jet recording media
- Tg glass point transition points
- the synthetic resin emulsion constituting the coating composition of the present invention comprises a radically polymerizable unsaturated monomer having a silyl group (A) and another radically polymerizable unsaturated monomer copolymerizable (B). It can be obtained by emulsion polymerization simultaneously or separately in the presence of a radical polymerizable surfactant.
- a radical polymerizable surfactant in order to produce a synthetic resin having two or more different glass transition points, two or more emulsion particles having different glass transition points, which are separately emulsion-polymerized, are mixed or polymerized stepwise.
- the radically polymerizable unsaturated monomer (A) having a silyl group of the present invention not only improves the scratch resistance of the film surface because the silyl group is hydrolyzed to form a crosslinked structure, but also an inorganic component such as silicon.
- an inorganic component such as silicon.
- colloidal silica the effect of coupling the polymer with the colloidal silica can be expected.
- a film is formed that takes advantage of the characteristics of both inorganic and organic materials. Specifically, a flexible, water- and heat-resistant film is formed.
- the radical polymerizable unsaturated monomer (A) having a silyl group used in the present invention is represented by the following general formula (1) or (2) having a radical polymerizable unsaturated bond. Compound.
- R represents an organic group having a vinyl group, a (meth) acryloxy group, an epoxy group, a mercapto group, an amino group or an isocyanate group.
- R ′ represents a lower alkyl group having 1 to 3 carbon atoms.
- X represents a methoxy group or an ethoxy group having a radically polymerizable unsaturated bond.
- Examples of monomers having an alkoxysilyl group in the side chain include vinyl trimethoxysilane, vinyl methyl dimethoxy silane, vinyl dimethyl methoxy silane, vinyl triethoxy silane, vinyl (2-methoxyethoxy) silane, vinyl triacetoxy silane, and the like.
- these unsaturated monomers (A) may be used alone or in combination of two or more.
- vinyltriethoxysilane and 3-methacryloxypropyltriethoxysilane are particularly preferred from the viewpoint of polymerizability.
- the amount of the radically polymerizable unsaturated monomer having a silyl group (A) to be used is suitably from 0.1 to 15 parts by weight based on all the radically polymerizable unsaturated monomers used. And preferably 0.5 to 10 parts by weight.
- the amount of the radically polymerizable unsaturated monomer having a silyl group is less than 0.1% by weight, complexing with colloidal silica becomes insufficient, and water resistance may decrease. If the content is more than 10% by weight, destabilization of polymerization, multiple generation of aggregates, increase in viscosity, etc. may occur.
- the other copolymerizable radically polymerizable unsaturated monomer (B) used in the present invention can be used without any particular limitation as long as it can be used for ordinary emulsion polymerization. These consist of a main monomer (B-1), which is a main component of the synthetic resin, and a functional monomer (B-2), which modifies the synthetic resin to provide further functions.
- alkyl (meth) acrylate alkyl (meth) acrylate, cycloalkyl ester (meth) acrylate, vinyl olefin, vinyl ester, aromatic And vinyl compounds.
- alkyl (meth) acrylates and cycloalkyl (meth) acrylates include alkyl groups such as methyl, ethyl, n-butyl, t-butyl, propyl, 2-ethylhexyl, and octyl. And alkyl groups of (meth) acrylic acid having 1 to 12 carbon atoms, cyclohexyl acrylate, cyclohexyl methacrylate and the like.
- Examples of the olefin include ethylene, propylene, and vinyl esters such as vinyl acetate, vinyl esters of branched carboxylic acids, and vinyl laurate.
- Examples of the aromatic vinyl compounds include styrene and ⁇ -methylstyrene.
- Functional monomers ( ⁇ -2) that modify the synthetic resin to provide functions such as storage stability, water resistance, chemical resistance, weather resistance, and adhesiveness include, for example, storage stability and adhesion.
- Ethylenically unsaturated carboxylic acid (B-2a) to improve, monomer having two or more radical polymerizable unsaturated bonds to improve water resistance, weather resistance, chemical resistance, adhesiveness, etc.
- (B-2b) Amide group, nitrile group, hydroxyl group, glycidyl group, methylol group, carbonyl group, quaternary ammonium salt, ethylene oxide chain, chlorine in the side chain And the like (B-2 and others).
- Examples of the ethylenically unsaturated carboxylic acid (B-2a) include acrylic acid, methacrylic acid, crotonic acid, and maleic acid.
- Monomers having two or more radically polymerizable unsaturated bonds include divinyl compounds, di (meth) acrylate compounds, tri (meth) acrylate compounds, tetra (meth) acrylate compounds. And diaryl compounds, triaryl compounds, tetraaryl compounds, etc., and more specifically, dibibenzene, divinyl adipate, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, triethylene glycol di (meth) acrylate.
- Other functional monomers include monomers having a hydroxyl group, such as hydroxyethyl methacrylate, hydroxyethyl acrylate, hydroxypropyl methacrylate, hydroxypropyl acrylate, and hydroxybutyl methacrylate.
- amide group-containing monomers include acrylamide, methacrylamide; and nitrile group-containing monomers, acrylonitrile;
- Examples of the monomer having chlorine in the side chain include vinyl chloride and vinylidene chloride, and examples of the monomer having a glycidyl group include glycidyl methacrylate and dalicydyl acrylate, and a methylol group N-methyl It includes Lumpur acrylamide, and examples of the monomer having a carbonylation group, ⁇ Seto ⁇ Se Toki Chez chill main evening acrylate, and the like.
- the (B-1) main monomer is preferably an alkyl (meth) acrylate, a cycloalkyl (meth) acrylate, styrene, or a vinyl ester of a branched carboxylic acid.
- alkyl (meth) acrylate preferably an alkyl (meth) acrylate, a cycloalkyl (meth) acrylate, styrene, or a vinyl ester of a branched carboxylic acid.
- a combination of two or more alkyl (meth) acrylates, a combination of styrene, a combination of two or more alkyl (meth) acrylates, and a combination of a vinyl ester of a branched carboxylic acid and a pixis methacrylate It is preferable from the viewpoints of water resistance, weather resistance, polymerization stability and the like.
- the use of two or more (meth) acrylic acid acrylates in combination is convenient for adjusting the glass transition point and improving various physical properties.
- an ethylenically unsaturated carboxylic acid is preferable, and the ethylenically unsaturated carboxylic acid is easily oriented on the surface of the synthetic resin emulsion particles, and a part of the hydroxyl group is contained in the emulsion.
- the addition forms an electric double layer and contributes to the dispersion stability of the emulsion particles.
- At least one of them may be used, but it is selected from alkyl (meth) acrylates, cycloalkyl (meth) acrylates, styrene, and vinyl esters of branched carboxylic acids. It is preferable to use a combination of at least one or more and at least one selected from ethylenically unsaturated carboxylic acids as the functional monomer.
- the emulsion polymerization in the present invention is carried out in an aqueous medium with the addition of other known components, and a surfactant and a polymerization initiator are used as the other components.
- a protective colloid, a chain transfer agent, a pH adjuster, an ultraviolet absorber, a photooxidant, and the like may be used as desired.
- the surfactant functions as an emulsifier at the time of emulsion polymerization, and specific examples thereof include ordinary anionic, cationic and nonionic surfactants.
- a radically polymerizable surfactant having one radically polymerizable unsaturated group in the molecule is particularly used.
- the radically polymerizable surfactant is chemically bonded to the polymer component due to the presence of the polymerizable unsaturated bond, and may bleed out to the film surface as a free surfactant when a film is formed. Absent. This allows the ink to quickly penetrate into the fixing layer without causing bleeding in inkjet printing. If a radically polymerizable surfactant is not used, a free surfactant is applied to the film surface. Out and present, causing ink bleeding during printing.
- the radically polymerizable surfactant can be appropriately selected from known substances, and examples thereof include anionic and nonionic surfactants. Specific examples thereof include the following compounds 1) to 16).
- R 1 , R 2 H, CH 3
- R 3 C 7 - 21 alkyl, an alkenyl group
- M alkali metal, aluminum group, amine
- R H, CH 3 , A: alkylene group, n: integer of 2 or more,
- R 1 H, CH 3
- R 2 an unsubstituted or substituted carbon group, etc.
- A an alkylene group, substituted alkylene group C 2 ⁇ 4,
- n 0, positive number
- CH2 iCcCHH2200CCH 2 iClHCH200CCHS: H, CH 3
- R 2 unsubstituted or substituted amino group such as R2 (AO) nOOC (!; H2
- A C 2 _4 alkylene group, n: 0 to; L 00, M: monovalent, divalent cation,
- R 1 C 6 - l3 Arukinore groups such,
- R 2 H, C 6 - alkyl group 18 or the like
- R 3 H, propenyl group
- A an alkylene group, substituted alkylene group C 2 ⁇ 4,
- M Alkali metal, etc.
- n 1 to 200
- R 1 H, CH 3
- R 2 C 8 - 2 hydrocarbon group
- Alkylene group 4, - C 2 A
- M H, alkali metal, alkaline earth metal, Ammonium group, etc.
- R hydrocarbon group having C 8 ⁇ 22,
- M Al-Li metal, ammonium base
- M Al-Li metal, ammonium base
- CHCOO (AO) mR R alkyl, alkylphenyl, A: ethylene, CHCOO M: ammonium, amine, alkali metal,
- R1 CH3 R 1, R 2: H. CH 3,: 0 ⁇ : L 00, CH2 ic00 (C2H4O) x (CHCH2O) y ⁇ C2H40) Z R2 y: 0 ⁇ 100, z: 0 ⁇ 100,
- R 1 alkyl group of C 6 , I8 , etc.
- R 2 an alkyl group such as H, Cs to ie ,
- R 3 H. propenyl group
- n 1 to 200
- compound 141 H. CH 3 , R 2 : a carbon hydride group of Ca- 24 , ⁇ : C 2 alkylene group,
- radically polymerizable surfactant examples include sodium alkylbenzenesulfonate, sodium alkylsulfonate, and polyoxyethylene alkyl ether sulfonate.
- nonionic surfactant examples include a polyoxyethylene alkyl ether type, a polyoxyethylene alkyl ether type, a polyoxyethylene or a propylene glycol type, and the like.
- surfactants are charged in their entirety at the beginning of the polymerization, at least a part of the surfactant is added dropwise, mixed with a monomer and used as an emulsion monomer in the polymerization, or used in combination. You. In the present invention, it is preferable to mix the monomer with the monomer and use it as an emulsified monomer in the polymerization in view of polymerization stability and control of particle diameter.
- the amount of the total surfactant used is about 0.1 to 20% by weight based on all monomers.
- it is essential to use a radically polymerizable surfactant, but the use amount is from 0.3 to 10% by weight, preferably from 0.5 to 5. Paper (Rule 2 $) 0% by weight.
- the reaction system may aggregate or the reaction may not be completed. If more is used than necessary, the surfactant is liberated on the surface of the coating layer and ink bleeding occurs. If it exceeds 10% by weight, the viscosity of the reaction system may be too high or the water resistance may decrease.
- the polymerization initiator radically decomposes by heat or a reducing substance to promote addition polymerization of monomers, and includes water-soluble or oil-soluble persulfates, peroxides, and avizopis compounds.
- water-soluble or oil-soluble persulfates, peroxides, and avizopis compounds include potassium persulfate, ammonium persulfate, peroxide at the butylhydrid, hydrogen peroxide, azobiszipoptyronitrile (AIBN), Rongalit, sodium metabisulfite, and the like. These may be used alone or in combination of two or more.
- a transition metal ion may be used in combination with these polymerization initiators.
- ferric sulfate, cupric chloride, ferric chloride and the like are preferable.
- the protective colloid can be used without any particular limitation as long as it is a known one used for emulsion polymerization, and examples thereof include polyvinyl alcohol and its derivatives, cell mouth water and its derivatives, and starch derivatives. Is used as an aqueous solution.
- the chain transfer agent is not particularly limited and may be appropriately selected from known ones.
- examples include alcohols such as methanol, ethanol, propanol, and butanol, acetone, methyl ethyl ketone, cyclohexane, and acetophene.
- C2-C8 carboxylic acids such as acetate aldehyde, propionaldehyde, ⁇ -butyraldehyde, furfural, benzaldehyde, dodecyl mercaptan, lauryl mercaptan, normal mecaptan, thioglycolic acid, octyl thioglycolate, and thiol.
- mercaptans such as glycerol. These may be used alone or in combination of two or more.
- pH adjusters include ammonia, sodium hydroxide, potassium hydroxide and the like.
- UV absorber benzophenone derivatives, benzotrione An azole derivative is suitably used. Some of these have radically polymerizable unsaturated bonds, and are preferably copolymerized with the synthetic resin component.
- Preferred examples of the antioxidant include hindered phenol and hindered piperidine.
- some photooxidants have radically polymerizable unsaturated bonds, which are preferred because they are copolymerized with the synthetic resin component.
- the present invention is characterized in that the synthetic resin emulsion obtained by emulsion polymerization has at least two or more glass transition points.
- the glass transition point (T g) of the polymer of the synthetic resin emulsion at least one point is 30 ° C or less, especially ⁇ 50 to 30 ° (and at least another point is higher than 30 ° C,
- the temperature is particularly preferably 100 ° C or lower, and more preferably at least one point is ⁇ 30 to 30 ° C, and at least one other point is 50 to 90 ° C.
- the resin component of the present invention can have the excellent properties of both components at the same time, and when combined with other requirements, provide a very excellent coating composition.
- the glass transition point refers to a temperature at which the synthetic resin particles in the synthetic resin emulsion undergo a phase change from a hard and brittle glass state to a soft rubber state.
- the emulsion glass transition point in the present invention means that at least two or more temperatures at which this phase change occurs exist.
- the glass transition point can be easily confirmed by measuring with an analyzer such as a differential scanning calorimeter (DSC).
- DSC differential scanning calorimeter
- a synthetic resin emulsion separately emulsion-polymerized may be mixed, or a monomer set in a polymerization step may be mixed. It is necessary to use a multi-stage polymerization in which the composition is changed stepwise, a power feed polymerization method in which the monomer composition is changed as needed, and a seed polymerization method.
- the synthetic resin emulsion film obtained by these polymerization methods behaves differently from a synthetic resin emulsion obtained by polymerizing with a uniform monomer composition.
- a synthetic resin emulsion for example, an acrylate copolymer emulsion or a styrene-acrylate copolymer emulsion having a glass transition point of 30 ° C or less and a glass transition point of 50 or more are used. It is preferable to mix the acrylic ester copolymer emulsion or the styrene-acrylate copolymer emulsion in a ratio of 10:90 to 90:10 (parts by weight) in terms of nonvolatile components.
- the synthetic resin emulsion of the present invention is obtained by a multi-stage polymerization method, for example, a monomer mainly composed of acrylic acid acrylate whose composition is adjusted so that the glass transition point becomes a desired temperature or lower is emulsion-polymerized, It is preferable to carry out emulsion polymerization of a monomer mainly composed of acrylacrylic ester whose composition has been changed so that the glass transition point becomes a desired temperature or higher. As a result, emulsion particles having a core-shell shape, a complex shape, a snow-like shape or the like can be formed.
- the ratio of the composition having a low glass transition point to the composition having a high glass transition point is preferably 10:90 to 90:10 (parts by weight) in terms of nonvolatile components.
- the resin component having a low glass transition point is less than 10 parts by weight, sufficient gloss cannot be obtained, and stress relaxation at the time of bending becomes insufficient.
- the amount is more than 90 parts by weight, the film formation is too uniform, and the fine holes and cracks to absorb the ink are insufficient, and the printing is performed. Aptitude worsens.
- the present invention is characterized in that colloidal silica is used together with the synthetic resin emulsion.
- Colloidal silica is an ultrafine silica sol that is colloidally dispersed in water.
- the particle size of the primary particles is usually in the range of 5 to 100 nm.
- the colloidal silica may be a commercially available product, may be surface-treated with a metal ion such as metaaluminate ion, may be monodispersed, or may be a bead by special treatment. They may be connected in a shape or branched and connected.
- those that have been surface-treated with metal ions such as metaaluminate ions are preferable because of their excellent miscibility.
- the coating composition of the present invention can be used in a water-based coating composition to adjust or supplement whiteness, viscosity, fluidity, miscibility, preservability, weatherability, workability, etc., if necessary.
- Various pigments, dyes, coloring pigment thickeners, pH adjusters, surfactants, dispersants, defoamers, antifreeze agents, release agents, ultraviolet absorbers, photooxidants, etc. can be added. .
- An ink jet recording medium is obtained by applying the coating composition of the present invention as a gloss layer and drying.
- the material and structure of the substrate to the ink coating layer are not particularly limited as long as the substrate to the ink coating layer are generally used for an ink jet recording medium.
- the gloss layer of the present invention is coated with a known coating method (commaco one-blade, blade co-one). Coat, air knife coater, etc.) and dry and give gloss.
- An ink-fixing layer may be applied to the base material so that the ink-receiving function is provided by coating a composition comprising a pigment, a binder, and a cationic substance having an ink-fixing ability.
- a composition comprising a pigment, a binder, and a cationic substance having an ink-fixing ability.
- a pigment, a binder, and a cationic substance having an ink-fixing ability In the case of paper, cloth, or the like, at least a part or all of them can be incorporated by impregnating a pigment, a binder, a cationic substance having an ink fixing ability, or the like at the paper making stage.
- pigments include inorganic pigments such as zinc oxide, titanium oxide, calcium carbonate, silicic acid, silicate, clay, talc, mai, calcined clay, aluminum hydroxide, barium sulfate, lithobon, silica, colloidal silica, polystyrene, and polyethylene.
- examples include spheres such as ren, polypropylene, epoxy resin, acrylic resin, and acryl-styrene copolymer, hollow, or plastic pigments processed into various shapes and structures.
- binder examples include polyvinyl alcohol, modified polyvinyl alcohol, starch and its derivatives, cellulose ether and its derivatives, polysodium acrylate, polyvinylpyrrolidone, acrylamide copolymer, (meth) acrylic acid copolymer, and polyethylene glycol.
- the coating amount (cast coating amount) of the coating composition for the glossy layer according to the present invention is preferably 5 to 50 g / m 2 (in terms of nonvolatile components), and 7 to
- Drying after coating may be performed by means of hot air drying, calendering, casting or the like. More specifically, after coating, it is preferable to perform casting by setting the temperature of the cast roll to 60 to 100 while the coating composition is still wet.
- the ink jet recording medium obtained in this way has extremely high performance in that it has high gloss, weather resistance, ability to follow stress changes due to bending, and high ink receptivity. .
- the glass transition point of the obtained synthetic resin emulsion particles was determined to be an inflection point in a temperature range of 15 ° C or less by a measurement of DSC (manufactured by Parkin Elma).
- the point of inflection is less than or equal to O or lower or lower or lower or lower or higher
- the synthetic resin emulsion of Production Example 1 was mixed with 30 parts by weight of non-volatile content, and the synthetic resin emulsion of Production Example 3 was mixed with 70 parts by weight of non-volatile content.
- two inflection points were observed, one in the temperature range below 15 ° C and one in the temperature range above 70 ° C.
- a coating comprising 5 parts by weight of a thickener and 2 parts by weight of a polyethylene wax as a mold release agent by combining 120 parts by weight of non-volatile content with colloidal silica of 100 parts by weight of non-volatile content of the above synthetic resin emulsion.
- the composition was prepared.
- This coating liquid is coated on a paper substrate with an ink fixing layer composed of a pigment, a binder, and a cationic substance, and immediately after the upper layer is coated using a barco, the surface temperature becomes 80 °. C was pressed against a cast drum having a mirror surface, dried, and then released to obtain glossy inkjet recording paper. At this time, the cast coating amount was 10 g / m 2 in terms of nonvolatile components.
- Example 1 was carried out in the same manner as in Example 1 except that the kind and amount of the synthetic resin emulsion and the amount of colloidal silica were changed as shown in Table-3. Evaluation
- the glossy ink jet recording paper thus obtained was evaluated for white paper gloss, printability, and bending resistance.
- the results are shown in Table 1.
- the details of each test are as follows. Gloss on white paper: Gloss at 75 ° was measured in accordance with JIS—P8142, and evaluated according to the following criteria.
- ⁇ 60 or more and less than 65
- ⁇ 55 or more and less than 60
- Printability Ink jet printing (ISO / JIS—SCIDJISX 9201-1995: N5) was performed using an inkjet printer PM-7770 manufactured by Seiko Epson Corporation, and the printability was visually evaluated.
- ⁇ Slightly adjacent ink is mixed.
- X Ink flows and mixes, which is not practical.
- Folding resistance Visual evaluation of the surface condition when the obtained inkjet recording paper is folded at 90 °. did.
- Synthetic resin of Production Example 1 Synthetic resin emulsion was mixed with 100 parts by weight of non-volatile component and 120 parts by weight of non-volatile component to form colloidal silica, 5 parts by weight of thickener, polyethylene wax 2 as release agent A coating composition consisting of 38 parts by weight of nonvolatile components consisting of parts by weight was prepared.
- This coating composition was applied in the same manner as in Example 1 to obtain an ink jet recording paper. At this time, the cast coating amount was 10 g / m 2 in terms of nonvolatile components.
- Comparative Example 1 was carried out in the same manner as in Comparative Example 1, except that the type and amount of synthetic resin emulsion and the amount of colloidal silica were changed as shown in Table 4. '
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Ink Jet Recording Methods And Recording Media Thereof (AREA)
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Description
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Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02705305A EP1384596A4 (en) | 2001-03-19 | 2002-03-18 | COATING COMPOSITION FOR INKJET PRINTING MEDIUM AND INKJET PRINTING MEDIUM |
US10/471,929 US7144944B2 (en) | 2001-03-19 | 2002-03-18 | Coating composition for ink-jet recording medium and ink-jet recording medium |
BR0204498-6A BR0204498A (pt) | 2001-03-19 | 2002-03-18 | Composição de revestimento para meio de registro a jato de tinta e meio de registro a jato de tinta preparado com a mesma |
CA002441426A CA2441426A1 (en) | 2001-03-19 | 2002-03-18 | A coating composition for ink jet recording media and coated media |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2001-079186 | 2001-03-19 | ||
JP2001079186A JP3599677B2 (ja) | 2001-03-19 | 2001-03-19 | インクジェット記録媒体用コーティング組成物およびインクジェット記録媒体 |
Publications (1)
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WO2002074549A1 true WO2002074549A1 (fr) | 2002-09-26 |
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Family Applications (1)
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PCT/JP2002/002558 WO2002074549A1 (fr) | 2001-03-19 | 2002-03-18 | Composition de revetement pour support d'impression a jet d'encre et support d'impression a jet d'encre |
Country Status (7)
Country | Link |
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US (1) | US7144944B2 (ja) |
EP (1) | EP1384596A4 (ja) |
JP (1) | JP3599677B2 (ja) |
KR (1) | KR20030011850A (ja) |
BR (1) | BR0204498A (ja) |
CA (1) | CA2441426A1 (ja) |
WO (1) | WO2002074549A1 (ja) |
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WO2021112816A1 (en) * | 2019-12-02 | 2021-06-10 | Hewlett-Packard Development Company, L.P. | Inkjet overcoat composition |
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- 2002-03-18 KR KR1020027015512A patent/KR20030011850A/ko not_active Application Discontinuation
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1470928A1 (en) * | 2001-12-28 | 2004-10-27 | Clariant International Ltd. | Coating composition for ink-jet recording medium and ink-jet recording medium |
EP1470928A4 (en) * | 2001-12-28 | 2005-03-09 | Clariant Int Ltd | COATING COMPOSITION FOR INK RADIATION MEDIUM AND INK RADIATION MEDIUM |
Also Published As
Publication number | Publication date |
---|---|
US7144944B2 (en) | 2006-12-05 |
JP3599677B2 (ja) | 2004-12-08 |
EP1384596A4 (en) | 2006-09-13 |
BR0204498A (pt) | 2003-06-03 |
EP1384596A1 (en) | 2004-01-28 |
US20040077781A1 (en) | 2004-04-22 |
KR20030011850A (ko) | 2003-02-11 |
CA2441426A1 (en) | 2002-09-26 |
JP2002274014A (ja) | 2002-09-25 |
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