WO2001044384A1 - Ensemble d'encres pour impression a jet d'encre, son procede de production, procede d'impression d'image et impression - Google Patents
Ensemble d'encres pour impression a jet d'encre, son procede de production, procede d'impression d'image et impression Download PDFInfo
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- WO2001044384A1 WO2001044384A1 PCT/JP2000/008867 JP0008867W WO0144384A1 WO 2001044384 A1 WO2001044384 A1 WO 2001044384A1 JP 0008867 W JP0008867 W JP 0008867W WO 0144384 A1 WO0144384 A1 WO 0144384A1
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- ink set
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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
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/40—Ink-sets specially adapted for multi-colour inkjet printing
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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
- B41M5/0023—Digital printing methods characterised by the inks used
Definitions
- the present invention relates to an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water, a method for producing the same, and an image recording method using the same.
- the ink composition shows good ejection stability by adjusting the flow characteristics or dynamic viscoelasticity at 20 ° C of the ink composition within a specific range.
- the present invention relates to an ink jet recording ink set capable of achieving high-precision suppression of variation in amount and obtaining a high-quality image, a method of manufacturing the same, and an image recording method and a recorded matter using the same.
- the ink jet recording method is a printing method in which small droplets of an ink composition (also simply referred to as ink in the present specification) are made to fly and adhere to a recording medium such as paper to perform printing.
- This printing method is capable of printing high-resolution, high-quality images at high speed and easily, and in recent years, in particular, has recently become an image forming method that can replace photographs in color printing.
- the ink used in the ink jet recording method generally contains a coloring agent, a wetting agent such as glycerin, water, and the like.
- colorants used in inkjet recording inks include high image quality such as colorant saturation and color reproducibility, a wide variety of available colorants, and solubility in water.
- Water-soluble dyes have been used from the viewpoint of reliability such as clogging.
- water-soluble dyes are sometimes poor in water fastness and light fastness, and printed matter printed with the water-soluble dye ink is poor in water fastness and light fastness. Therefore, in recent years, it has been studied to use a pigment having excellent fastness such as water resistance and light resistance or a dye insoluble or hardly soluble in water instead of the conventional water-soluble dye.
- a pigment having excellent fastness such as water resistance and light resistance or a dye insoluble or hardly soluble in water instead of the conventional water-soluble dye.
- unlike water-soluble dyes do not have solubility in water, so they need to be stably dispersed in water to prevent sedimentation of pigment particles and dyes that are insoluble or hardly soluble in water.
- a method for preventing clogging a method of dispersing pigment particles or a water-insoluble or hardly-soluble dye in an aqueous medium using various surfactants or dispersants such as aqueous resins is known.
- the ink jet recording method is a method in which ink is ejected as fine droplets from fine nozzles to record characters and figures on the surface of a recording medium.
- the ink jet recording method uses an electrostrictive element to convert electrical signals into mechanical signals, and intermittently ejects the ink stored in the nozzle head to record characters and symbols on the surface of the recording medium.
- the ink stored in the nozzle head portion is heated rapidly at a location very close to the discharge portion to generate bubbles, and the bubbles expand intermittently due to the volume expansion caused by the bubbles.
- a method for recording such information has been developed and put into practical use.
- the ink used for such ink jet recording has good ejection properties, no disturbance of printing due to satellite, good printing on various recording media, and a nozzle head using an electrostrictive element. In such a case, stable driving frequency characteristics of the ink discharge amount and the like are required.
- the ejection stability is not sufficient, and an ink having more excellent ejection stability is desired.
- Japanese Patent Application Laid-Open No. Sho 62-95366 discloses a method of using a microcapsule in which a dye ink is included in one polymer particle as a recording liquid. The method is disclosed in Japanese Patent Application Laid-Open No. H11-77072, in which a dye is dissolved or dispersed in a solvent substantially insoluble in water, and this is emulsified and dispersed using a surfactant in water.
- JP-A-5-39447 discloses a method of using a dye encapsulated in a microphone opening as a recording liquid by the method described in Japanese Patent Application Laid-Open No. HEI 5-39447, in which at least one of water, a water-soluble solvent and a polyester resin is sublimable.
- a method in which microcapsules having inclusions in which a dye is dissolved or dispersed is used as a recording liquid is disclosed in Japanese Patent Application Laid-Open No. Hei 6-313131.
- Japanese Patent Application Laid-Open Publication No. H11-163,086 discloses an aqueous ink composition comprising colored emulsion polymerized particles and various aqueous materials.
- the ink used for ink jet recording has no bleeding, has good drying properties, can be printed uniformly on all the recording medium surfaces, and is multicolored, such as color printing, when printing on paper as a recording medium. Characteristics such as that adjacent colors are not mixed in system printing are required. A particular problem here is the occurrence of bleeding when paper is used as the recording medium.
- inks that use pigments as colorants mainly by suppressing the permeability, suppress the ink wetting on the paper surface and keep the ink droplets close to the paper surface to improve the print quality. Consideration has been given to securing it and it has been put into practical use.
- ink that suppresses wetting on paper the difference in bleeding due to the difference in paper type is large, especially in recycled paper that contains various paper components, due to the difference in ink wetting characteristics for each component. Bleeding occurred.
- such an ink has a problem that it takes time to dry a character, and that adjacent colors are mixed in multicolor printing such as color printing, and a pigment is used as a coloring agent. In the used ink, the pigment remains on the surface of paper or the like, so that there was a problem that the rubbing property was deteriorated.
- No. 2,083,372 discusses the use of diethylene glycol ethers for the ink.
- the combination of glycol ether and pigment is based on the use of triethylene glycol monomethyl ether as the pigment as disclosed in JP-A-56-147681.
- inks using a pigment as a colorant often have problems in ejection stability such as flight bending.
- An ink set has been proposed in which the aforementioned inks having a plurality of different colors are combined.
- ink jet recording ink sets having an ink composition using a pigment as a coloring agent, which can not be said to sufficiently suppress variations in the amount of ink discharged between the colors, can provide high-quality images. Coveted.
- an ink jet recording ink set comprising: an ink jet recording ink set capable of obtaining a high-quality image by achieving high-precision ejection stability of each ink and suppression of variation in ink ejection amount between colors; It is an object of the present invention to provide an ink set for recording and a method of manufacturing the same, and an image recording method and a high-quality recorded matter capable of obtaining high-quality images.
- the present inventor has found that, in an ink jet recording ink set having a plurality of ink compositions, the ink composition has a flow characteristic at 20 ° C. (hereinafter also referred to as a static viscoelasticity property.
- a static viscoelasticity property Surprisingly, by adjusting the dynamic viscoelastic properties within a specific range, it shows good ejection stability and achieves highly accurate control of the variation in ink ejection amount between each color, and extremely high image quality That the image of the present invention can be obtained. It is completed. That is, the present invention is as follows. ⁇ First ink jet recording ink set of the present invention>
- a first ink jet recording ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing a colorant, a water-soluble organic solvent, and water at least. The mouth of each of the ink compositions
- the viscosity of the ring pole type at a temperature of 20 ° C while changing the tilt angle ⁇ ⁇ by a predetermined angle, measure the viscosity at a predetermined angle set in advance, set the horizontal axis to sin0, and
- the difference between the slopes of the curves is within 0.04.
- the zero shear viscosity is 3-1 OmPa's, and the gradient is in the range of 0.1-0.
- a second ink jet recording ink set according to the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- the ink composition is characterized in that the flow characteristics at 20 ° C. of each of the ink compositions are set so as to satisfy the following formula (I).
- Shear rate of ink is 3 (seconds- 1 ) Shear stress at CD (Pa),
- the flow characteristics of each of the plurality of ink compositions at 20 ° C. are set so as to satisfy the following formula (III). ⁇ 1...
- the third ink jet recording ink set of the present invention >
- a third ink jet recording ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- the ink composition is characterized in that the flow characteristics at 20 ° C. of each of the ink compositions are set so as to satisfy the following formula (IV).
- Iog (4xl0 4) -log (3xl0 4) shear rate of the ink is, 3 x 1 o 4 (sec - 'when shear stress (Pa),
- the shear rate of the ink is 4 x 10 4 (seconds-hour shear stress (Pa>
- the flow characteristics at 20 ° C. of each of the plurality of ink compositions are set so as to satisfy the following formula (V). l 0 3 ⁇ 4 ⁇ 3 ⁇ 4 ⁇ _ ⁇ 1 ... ( ⁇ )
- the shear rate is 4x10 4 (sec- '
- the flow characteristics at 20 ° C. of each of the plurality of ink compositions are set so as to satisfy the following formula (VI).
- the fourth ink jet recording ink set of the present invention >
- a fourth ink jet recording ink set of the present invention is an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water,
- the dynamic viscoelasticity at 20 ° C. of each of the plurality of ink compositions is set so as to satisfy the following formula (VIII).
- the applied frequency ( ⁇ ) for the ink composition is
- the dynamic viscoelasticity at 20 ° C. of each of the plurality of ink compositions is set so as to satisfy the following formula (IX).
- the applied frequency ( ⁇ ) for the ink composition is
- the colorant is a pigment.
- the colorant is a self-dispersion pigment having a surface subjected to a hydrophilic treatment, preferably a self-dispersion pigment.
- the type pigment is obtained by hydrophilizing the surface with a functional group selected from the group consisting of a carbonyl group, a carbonyl group, a hydroxyl group, a sulfone group, a sulfonic acid group and salts thereof.
- the colorant is a microencapsulated pigment, and preferably, the microencapsulated pigment is It was coated with a compound.
- the polymer compound is selected from the group consisting of vinyl polymer compounds, polyesters, polyamides, polyimides, polyurethanes, amino polymer compounds, silicon-containing polymers, sulfur-containing polymers, fluorine-containing polymers, and epoxy resins. It is obtained by performing a crosslinking reaction after including a pigment in an organic phase containing at least a selected one or more as a main component or a polymer compound having a crosslinking reactive group and a hydrophilic group and a crosslinking agent at least. Preferred examples include those having a cross-linked structure.
- polymer compound a polymer compound obtained by polymerizing a monomer with a polymerizable surfactant having a polymerizable group, a hydrophobic group, and a hydrophilic group can be preferably exemplified.
- the polymerizable group is preferably an unsaturated hydrocarbon group, and is specifically selected from the group consisting of a vinyl group, an aryl group, an acryloyl group, a methacryloyl group, a propenyl group, a vinylidene group, and a vinylene group. More preferably, it is at least one.
- the hydrophilic group of the polymerizable surfactant is preferably at least one selected from the group consisting of a sulfone group, a sulfonic acid group, a carboxyl group, a carbonyl group, a hydroxyl group and a salt thereof.
- the monomer preferably contains a crosslinkable monomer.
- the colorant is a water-insoluble or poorly-soluble dye selected from disperse dyes and oil-soluble dyes.
- the colorant is dispersed in an aqueous medium by a dispersant, and preferably, the dispersant is a polymer Dispersants or surfactants.
- the above-mentioned polymer dispersant has a polymer having at least a moiety having an aromatic ring and a Z or aliphatic ring in the molecule and a moiety having a carboxyl group and / or a sulfonic acid group. And / or a polymer dispersant comprising a salt thereof.
- the ink compositions each include polymer fine particles.
- the polymer fine particles are fine particles having a film-forming property, having a hydrophilic group on the surface thereof, and having a particle diameter of 50 to 200 nm. And sulfonic acid groups and salts thereof.
- the polymer fine particles are preferably added to the ink composition in the form of a polymer emulsion having water as a continuous phase.
- the ink compositions each include a polar solvent.
- the polar solvent is composed of 2-pyrrolidone, N-methylpyrrolidone, ⁇ -force prolactam, dimethyl sulfoxide, sulfolane, morpholine, diethyl morpholine, and 1,3-dimethyl-12-imidazolidinone. It is preferable to include at least one selected from the group.
- the ink compositions each include an anionic surfactant and / or a nonionic surfactant. .
- each of the ink compositions contains an acetylene glycol compound as a nonionic surfactant.
- each of the ink compositions contains a glycol ether.
- the ink compositions each include a 1,2-alkyldiol.
- the surface tension of the ink composition is 20 to 45 mN / m, respectively.
- the first ink set for ink jet recording of the present invention is a method for producing an ink set for ink jet recording comprising a plurality of ink compositions each containing at least a colorant, a water-soluble organic solvent, and water.
- a single-ring-pole viscosity measurement of each of the plurality of ink compositions is performed under a temperature condition of 20 ° C. while changing the inclination angle S by a predetermined angle, and the viscosity at a predetermined predetermined angle is measured.
- the ink composition is prepared so as to be 2 mPa-s or less, and so that the difference in the slope of the sin0-viscosity curve is within 0.04.
- the ink composition is prepared such that the zero shear viscosity is in the range of 3 to 10 mPa's and the gradient is in the range of -0.1 to 0, respectively.
- a method for manufacturing the second ink jet recording ink set of the present invention >
- a second method for producing an ink jet recording ink set according to the present invention is directed to a method for producing an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- the method is directed to a method for producing an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- the flow characteristics at 20 ° C. of each of the plurality of ink compositions are represented by the following formula ( Preparing an ink composition so as to satisfy
- the shear rate of the ink is 5 (seconds—hourly shear stress (Pa) j
- the ink composition is prepared so that the flow characteristics at 20 ° C. of each of the plurality of ink compositions satisfy the following formula ( ⁇ ).
- the third method for producing an ink jet recording ink set of the present invention comprises a colorant.
- a method for producing an ink jet recording ink set comprising a plurality of ink compositions each containing at least a water-soluble organic solvent and water, wherein each of the plurality of ink compositions is at 20 ° C. It is characterized in that an ink composition is prepared so that the fluidity of the ink composition satisfies the following formula (IV).
- the ink composition is prepared such that the fluidity at 20 ° C. of each of the plurality of ink compositions satisfies the following formula (V). 7)
- the ink compositions are prepared such that the flow characteristics at 20 ° C. of each of the plurality of ink compositions satisfy the following formula (VI).
- the fourth method for producing an ink jet recording ink set of the present invention is directed to an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- a method for producing an ink composition characterized in that an ink composition is prepared such that dynamic viscoelastic properties at 20 ° C. of each of the plurality of ink compositions satisfy the following formula (VII): .
- the ink compositions are prepared such that the dynamic viscoelastic properties at 20 ° C. of each of the plurality of ink compositions satisfy the following formula (VIII).
- the ink composition is prepared such that the dynamic viscoelasticity at 20 of each of the plurality of ink compositions satisfies the following formula (IX).
- Image recording method of the present invention which is the storage rigidity (P a) at 0.8 rad / s>
- the image recording method of the present invention includes the first to fourth ink jet recording ink sets of the present invention or the ink jet recording ink sets obtained by the first to fourth manufacturing methods of the present invention. Use to form an image.
- the recorded matter of the present invention uses the first to fourth ink jet recording ink sets of the present invention or the ink jet recording ink sets obtained by the first to fourth manufacturing methods of the present invention. Thus, an image is formed.
- the ink set for ink jet recording according to the present invention is referred to as “ink set of the present invention” unless otherwise specified, and the first to fourth ink sets of the present invention are a plurality of ink compositions. Usually, it is configured by combining three or more ink compositions of different colors.
- the composition may be a composition in which the composition is combined.
- orange ink And Greenink can be combined.
- a first ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water,
- a single ring ball type viscosity measurement is performed under a temperature condition of 20 while changing the inclination angle 0 by a predetermined angle, measuring the viscosity at a predetermined angle set in advance, setting the horizontal axis to sin 0, and
- the viscosity measurement by the single-ring ring method can be carried out according to the method described in DIN 53015 or ISO / DIS 12058.
- the measurement can be carried out using an automatic fine particle viscometer (rolling ball type) “AMVn” (trade name) manufactured by Paar Physica.
- the “difference” means a difference between a largest one and a smallest one of a plurality of ink compositions having zero shear viscosity or gradient (sin 0-one viscosity curve). If the difference in the zero shear viscosity exceeds 0.2 mPa's, there will be a difference in the amount of ink ejected between the inks, and the amount of ink deposited on the recording medium will be different. There is a difference in diameter, and the desired image cannot be obtained. More specifically, since the dot diameter differs depending on the color, a color that cannot be filled occurs when printing under the same driving conditions in the printer. Also, when colors are reproduced by mixing colors, the desired color may not be obtained completely.
- the difference between the gradients is greater than 0.04, there will be a difference in the ejection properties between the inks, specifically in flight stability, and the ink droplets will not land at the target landing position. Because of this, No hue, poor image quality. Specifically, the desired color mixture may not be obtained, or an unintended mixed color may occur.
- the rolling pole type viscosity measurement will be described in further detail.For example, the measurement is performed by introducing a sample into a glass cavity controlled at a constant temperature, dropping a gold-plated steel ball, and using an optical sensor. The drop speed is measured, and after several measurements, the viscosity is calculated according to the following formula.
- V viscosity (mPa's)
- Measurement temperature 10 to 70 ° C. Specific measurement conditions can be as follows. In the production examples described later, measurement was performed under these conditions.
- Measurement temperature 20 ° C
- the meaning of measuring the viscosity at each tilt angle of 0 is as follows. That is, when the inclination angle ⁇ ⁇ ⁇ ⁇ is replaced by the shear rate, it can be said that the shear rate is lower as 0 is smaller, and the shear rate is higher as 0 is larger. Therefore, a change in the viscosity of the sample liquid with respect to 0 indicates a shear rate dependence of the viscosity of the liquid. Also, the shear rate referred to here indicates a low shear rate region.
- the viscosity of a Newtonian liquid such as water, does not depend on 0, whereas the viscosity of a non-Duton liquid depends on 0. Therefore, it is meaningful to measure the viscosity at the inclination angle ⁇ ⁇ .
- the ink composition used in the present invention is not particularly limited as long as the difference of the zero shear viscosity and the difference of the gradient in the plurality of ink compositions included in the ink set of the present invention are within the aforementioned ranges.
- those preferably used include at least a colorant, a water-soluble organic solvent, and water, and the zero shear viscosity is preferably 3 to 1 OmPa-s, and Preferably, the viscosity is 3 to 5 mPa's, and the gradient of the sin0-viscosity curve is preferably in the range of 0.1 to 0, more preferably 10.5 to 0. .
- the zero shear viscosity is less than 3 mPa's, small-diameter droplets, that is, satellites may be generated, and print quality may be degraded.
- it exceeds 1 O mPa's it becomes difficult to discharge, or even if it is discharged, the discharge speed becomes slow, so that the print quality may also deteriorate.
- the flight stability of the ink droplets cannot be obtained, so that the print quality may be degraded.
- it exceeds a problem may occur in the ejection stability such as ejection failure.
- a second ink set of the present invention is an ink jet recording ink set comprising a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- Shearing speed of ink is 3 (sec- 1 ) ⁇ shear stress (Pa),
- Shear rate of the ink is 5 (seconds—shear stress at time (Pa) j
- FIG. 1 is a schematic diagram of a flow characteristic curve (also referred to as a static viscoelastic characteristic curve) of the ink composition at 20 ° C.
- the abscissa represents the common logarithm of the shear rate (second— 1 ), and The common logarithm of the shear stress (Pa) is taken on the shaft.
- Equation (1-1) in the equation (I) can be expressed by the slope of the line segment AB in FIG. 1 if the points A and B are determined as in the following equation (1-2). Equation (I) indicates that the slope of the line segment AB is 0.6 (Pa / sec— 1 ) to 1 (PaZ second— 1 ).
- second Inkuse' bets of the invention contains at least a colorant, a water-soluble organic solvent, and water In an ink set for ink jet recording comprising a plurality of compositions, the flow characteristics at 20 ° C. of each of the plurality of ink compositions are set so as to satisfy the following formula (II).
- the shear rate of the ink is 5 (second-hour shear stress (Pa) j
- Equation (II-1) in the equation (II) can be expressed by the following equation (1) when the points A and B are determined as described above, as in the description of the equation (I). Equation (II) indicates that the slope of the line segment AB is 0.8 (Pa / sec- 1 ) to 1 (PaZsec- 1 ).
- the second ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing a colorant, a water-soluble organic solvent, and water at least. 20 ° C. for each of the plurality of ink compositions Is set so as to satisfy the following equation (III).
- Equation (III) indicates that the slope of the line segment AB is 0.9 (Pa / sec- 1 ) to 1 (Pa / sec- 1 ).
- the slope of the line segment AB is smaller than 0.6 (Pa / sec- 1 ), the interaction (attraction) between the ink compositions increases, the dispersibility decreases, and the ejection of each ink composition decreases. Since the output stability is reduced and the variation in the amount of ink ejected between the colors becomes remarkable, it is difficult to obtain a high-quality image. If the slope is 1 (P aZ sec- 1 ), it indicates Newtonian flow, so the slope of line segment AB may not exceed 1 (P a / sec- 1 ). Absent.
- the flow characteristics (the relationship between shear rate and shear stress) of the ink composition at 20 ° C. are measured using a rotational viscometer.
- Rotational viscometers are classified according to the shape of the measuring unit into a double cylindrical type, a conical single disk type, a parallel disk type and the like, and it is particularly preferable to use a double cylindrical type and a conical single disk type.
- the flow characteristics of the ink composition are as follows. It is obtained from the torque generated when rotating the cylinder at.
- the flow characteristics of the ink composition in the case of using a conical-one-disc type are as follows. It is obtained from the torque generated when a plate or conical plate is rotated at a constant angular velocity.
- the shear rate of interest in the second ink set of the present invention is in the range of 3 (seconds- 1 ) to 5 (seconds- 1 ), it is necessary to use a viscometer with high accuracy in that range. Is preferred.
- a viscometer include F1 uids Spectrometer RFS-2 manufactured by Rheometrics, and PHYS I CA MCR300 manufactured by Paar Physica.
- the shear rate of interest is 3 (sec- 1 ) to 5 (sec- 1 ). In range.
- a third ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water, wherein the ink composition comprises a plurality of the ink compositions.
- the flow characteristics at 20 ° C are set so as to satisfy the following formula (IV). Force (Pa)
- Fig. 2 is a schematic diagram of the flow characteristic curve (also called static viscoelastic characteristic curve) of the ink composition at 20 ° C. Similar to Fig. 1, the horizontal axis indicates the shear rate (seconds- 1 ). And the vertical axis represents the common logarithm of the shear stress (Pa).
- Equation (IV-1) in the equation (IV) can be obtained by defining the points C and D as shown in the following equation (IV-2). Equation (IV) indicates that the slope of the line segment CD is 0.6 (Pa / sec- 1 ) to 1 (Pa / sec- 1 ).
- the third ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water,
- the flow characteristics at 20 ° C. of each of the compositions are set so as to satisfy the following formula (V).
- Equation (V) indicates that the slope of the line segment CD is ⁇ .8 (Pa / sec- 1 ) to 1 (Pa / sec- 1 ).
- Shear rate of interest Te is, 3 X 1 0 4 (sec - 1) to 4 X 1 0 4 (sec - 1) in the range of, as such viscometer, for example, Anton Paar high pressure capillary Type viscometer HVA6 and the like.
- the third ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions each containing at least a colorant, a water-soluble organic solvent, and water.
- the flow characteristics at 20 ° C. of each of the compositions are set so as to satisfy the following formula (VI).
- the shear rate of the ink is 4x10 4 (second-hour shear stress (Pa)
- Equation (VI) the following equation (VI-1) can be obtained by defining the points C and D as described above, as in the description of the equation (IV). Equation (VI) indicates that the slope of the line segment CD is 0.9 (Pa / sec- 1 ) to 1 (Pa / sec- 1 ).
- a fourth ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water, wherein the plurality of ink compositions are provided.
- FIG. 3 is a schematic diagram of a dynamic viscoelasticity characteristic curve of the ink composition at 20 ° C.
- the abscissa indicates the common logarithm of the applied frequency ⁇ (rad / sec), and the ordinate indicates the storage rigidity G ′.
- the common logarithm of (P a) is used.
- Equation (VII) indicates that the slope of the line segment EF is 1.2 (Pa-sec / rad) to 2 (Pa-sec / rad).
- (VII-1) logG 8 -logG w 0.6 log0.8-log 0.6
- the fourth ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water,
- the dynamic viscoelastic properties at 20 ° C. of each of the compositions is set so as to satisfy the following formula (VIII).
- the fourth ink set of the present invention is an ink jet recording ink set including a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- the dynamic viscosity at 20 ° C. of each of the compositions is set so as to satisfy the following formula (IX).
- Equation (IX-1) in the equation (IX) is the slope of the line segment EF in FIG. 3 if the points E and F are defined, as in the description of the equation (VII).
- (IX) indicates that the slope of the line segment EF is 1.8 (Pa.sec / rad) to 2 (Pa.sec / rad).
- Such an ink composition can be obtained, for example, by measuring the dynamic viscoelastic properties of the ink composition using a viscoelasticity measuring device 1 shown in FIG.
- the measuring device 1 is provided with a precision measuring tube 5 having a radius a and a length L and containing the test liquid 2 and communicating with the test liquid reservoir 3 and surrounded by the constant temperature device 4.
- the test liquid 2 is subjected to vibration of frequency ⁇ via a thin film 6 by a vibration device (not shown).
- the pressure ⁇ and the volume flow U applied to the test liquid 2 oscillating and flowing by this vibration are measured by the sensor means 7.
- the shear stress r on the precision measurement tube wall is directly proportional to the pressure ⁇ , and the shear strain and shear rate a are directly proportional to the volume flow U. Therefore, the shear strain a and the shear rate a can be calculated from the pressure number P and the volume flow U from the shear stress of the sample liquid.
- the shear strain may be maintained at a constant value during the above measurement, and is typically within a range of about 0.1 to 10, preferably within a range of about 0.1 to 5. It should just be. If the shear strain is constant at a value within this range, the dynamic viscoelastic properties due to the shear strain have linearity. By having the linearity, it is possible to know only the frequency dependence of the purely dynamic viscoelastic function (G ', G'r?', 77 ", t & ⁇ ).
- the fourth ink set of the present invention In the preparation of the ink composition in the above, when the dynamic viscoelastic properties of the ink composition are measured under an applied frequency ( ⁇ ), the applied frequency is varied with a constant shear strain. Is in the range of about 0.01 to 10 rad / sec, preferably in the range of about 0.1 to 10 rad / sec. Vary within the box.
- the dynamic viscoelasticity of the ink composition is measured by varying the applied frequency ( ⁇ ) within the above range (low frequency), and the storage rigidity (G ') of the ink composition calculated from the measured value and the applied
- the relationship with the frequency ( ⁇ ) is represented on a two-dimensional coordinate axis, when there is an interaction between the colorant particles, the inclination tends to be flat as shown in FIG. Can be specified.
- the measurement of the dynamic viscoelastic properties of the ink composition can be performed by a conical-one-disk viscoelasticity measuring device other than the above-mentioned measuring device.
- the ink composition is placed in the gap between a cone and a disc placed horizontally up and down so that the center is on the same vertical axis.
- the torque generated during repetitive motion is detected, and the shear rate can be calculated from the following equation using the shear stress.
- a commercially available device for measuring the above dynamic viscoelastic properties can be used, and for example, PHYSICAM CR300 manufactured by Paar Physica can be used. The measurement is performed by stress control, and the frequency dependence of the dynamic viscoelastic functions (G ', G'',', 77 ''', tand) is obtained within the linear range.
- the device for measuring the dynamic viscoelastic properties is not particularly limited as long as the above basic principle is satisfied. However, devices for measuring the dynamic viscoelastic properties are commercially available, and these commercially available devices are used. It is also possible to do.
- SY STEM and DCR from Paar Physica can be used.
- first to fourth ink sets of the present invention have been described above.
- the flow characteristics or dynamic viscoelastic characteristics at 20 ° C. of each of the plurality of the ink compositions has been described above. Within the range, it can be achieved by appropriately adjusting the type and composition ratio of each component of the ink composition described in detail below.
- the ink set of the present invention includes a plurality of ink compositions containing at least a colorant, a water-soluble organic solvent, and water.
- a colorant e.g., a sodium bicarbonate
- a water-soluble organic solvent e.g., sodium bicarbonate
- water e.g., sodium bicarbonate
- the colorant examples include, first, pigments such as inorganic pigments and organic pigments, which can produce a desired color, and water-insoluble or hardly-soluble dyes such as disperse dyes and oil-soluble dyes.
- Organic pigments include azo pigments (including azo lakes, insoluble azo pigments, condensed azo pigments, chelate azo pigments, etc.), and polycyclic pigments (phthalocyanine pigments, perylene pigments, perinone pigments, anthraquinone pigments, Quinacridone pigments, dioxane pigments, thioindigo pigments, isoindolinone pigments, quinofuranone pigments, etc.), nitro pigments, nitroso pigments, and aniline black. More specifically, examples of pigments used as black ink include the following pump pump racks.
- Pigments used in yellow ink include C ⁇ Pigment Yellow 1, CI .Pigment Yellow 2, CIPigment Yellow 3, CIPigment Yellow 12, CI .Pigment Yellow 13, CIPigment Yellow 14, CIPigment Yellow 16, and CI .Pigment Yellow 17 , CIPigment Yellow 73, CIPigment Yellow 74, CI .Pigment Yellow 75, CIPigment Yellow 83, CIPigment Yellow 93, CIPigment Yellow 95, CIPigment Yellow 97, CIPigment Yellow 98, CI .Pigment Yellow 114, CI .Pigment Yellow 128, CIPigment Yellow 129 CI.Pigment Yellow 151, CI.Pigment Yellow 154 and the like.
- Pigments used in magenta ink include C ⁇ Pigment Red 5, CI Pigment Red 7, CI Pigment Red 12, CI Pigment Red 48 (Ca), CI Pigment Red 48 (Mn), CI Pigment Red 57 (Ca), CI Pigment Red Red 57: 1, CI Pigment Red 112, CI Pigment Red 123, CI .Pigment Red 168, CI Pigment Red 184, CI .Pigment Red 202, and the like.
- Pigments used for cyanink include CI Pigment Blue 1, CI Pigment Blue 2, CI Pigment Blue 3, CI Pigment Blue 15, CI Pigment Blue 15: 3, CI Pigment Blue 15:34, CI Pigment Blue 16, CI Pigment. Blue 22, CIPigment Blue 60, CIVat Blue 4, CIVat Blue 60 and the like. However, it is not limited to these.
- the content of the pigment in the ink composition is preferably in the range of 0.1 to 25% by weight, and more preferably in the range of 0.5 to 10% by weight.
- examples of dyes that are insoluble or hardly soluble in water include disperse dyes, oil-soluble dyes, and dye chelates (basic dye chelates, acid dye chelates, etc.).
- the content of the dye insoluble or hardly soluble in water in the ink composition is preferably in the range of 0.1 to 25% by weight, and more preferably in the range of 0.5 to 10% by weight.
- the coloring agent include a carbonyl group, a hydroxyl group, and a hydroxyl group.
- a self-dispersible pigment whose surface has been subjected to a hydrophilic treatment can be preferably used. Dispersible pigments can be dispersed in water without dispersants.
- the self-dispersible pigment may be an acetylene glycol compound represented by the following formula (6) as a nonionic surfactant preferably used in the present invention, propylene glycol monobutyl ether or dipropylene glycol monobutyl ether. It is stable when used together with glycol ethers such as ethylene glycol, diethylene glycol monobutyl ether and triethylene glycol monobutyl ether.
- Such a self-dispersible pigment can be converted into a hydrophilic functional group or a molecule containing the hydrophilic functional group or a molecule containing the hydrophilic functional group by a physical treatment such as vacuum plasma or a chemical treatment such as an oxidation treatment with hypochlorous acid or sulfonic acid.
- a physical treatment such as vacuum plasma
- a chemical treatment such as an oxidation treatment with hypochlorous acid or sulfonic acid.
- Examples of the sulfonation treatment for introducing a sulfonic acid group include treatment with a sulfonating agent such as sulfuric acid, fuming nitric acid, sulfonated pyridine acid, sulfamic acid, sulfur dioxide, sulfuric acid sulfuric acid, and amide sulfuric acid.
- a sulfonating agent such as sulfuric acid, fuming nitric acid, sulfonated pyridine acid, sulfamic acid, sulfur dioxide, sulfuric acid sulfuric acid, and amide sulfuric acid.
- the type of the functional group introduced on the surface of the pigment particles may be a single type or a plurality of types.
- the type and amount of the functional group to be introduced are appropriately determined in consideration of the dispersion stability of the treated pigment in the ink composition, the color density, and the like.
- the self-dispersion pigment can be obtained, for example, by the method described in JP-A-8-34998.
- the self-dispersion pigment of force black obtained by the method described in this publication has a high surface active hydrogen content of 1.5 to 2.5 mmo1 / g.
- examples of the colorant include a microencapsulated pigment. In the ink set of the present invention, the use of the microencapsulated pigment is particularly preferable.
- microencapsulated pigments can be prepared by known physical mechanical or chemical methods. Manufactured by technique. More specifically, phase separation method (coacervation), liquid drying method (interfacial precipitation method), spray drying method, pan coating method, liquid curing coating method, interfacial polymerization method, in situ method, ultrasonic method, etc. Can be used without particular limitation.
- phase separation method coacervation
- liquid drying method interfacial precipitation method
- spray drying method pan coating method
- liquid curing coating method liquid curing coating method
- interfacial polymerization method in situ method
- ultrasonic method etc.
- an anionic microencapsulated pigment described in Japanese Patent Application Publication No. Hei 9-151,432 can be used as the microphone-encapsulated pigment.
- the microphone-encapsulated pigment used in the present invention can also be obtained by a method described in JP-A-10-16909.
- a pigment coated with a polymer compound is preferable.
- high molecular compound examples include vinyl polymers, poly (meth) acrylic acid esters, styrene- (meth) acrylic acid copolymers, polyesters, polyamides, polyimides, polyurethanes, amino polymers, and the like. Those containing one or more of silicon polymer, sulfur-containing polymer, fluorine-containing polymer and epoxy resin as main components are preferably used.
- a pigment is contained in an organic phase containing at least a polymer compound having a crosslinking reactive group and a hydrophilic group and a crosslinking agent, and then a crosslinking reaction is performed.
- Polymer compounds having the following are also preferably used.
- the polymer compound a polymer compound obtained by polymerizing a monomer and a polymerizable surfactant having a polymerizable group, a hydrophobic group and a hydrophilic group is also preferably used.
- the polymerizable group is preferably an unsaturated hydrocarbon group, and examples thereof include a vinyl group, an aryl group, an acryloyl group, a methacryloyl group, a propylenyl group, a vinylidene group, and a vinylene group. Now you can use it.
- hydrophilic group one or more of a sulfone group, a sulfonic acid group, a carboxyl group, a carbonyl group, a hydroxyl group and a salt thereof are preferably used.
- monomer those containing a crosslinkable monomer are preferably used.
- the microencapsulated pigment in particular, a pigment obtained by coating the following pigment with the following polymer compound and having the following average particle diameter is preferably used.
- black ink is bonbon black and cyan ink is CI.
- Pigment Blue 15: 1 CI. Pigment Blue 15: 3, CI Pigment Blue 15: 4, and MAZEN YU Inc. are CI Pigment Red 122, CI Pigment Red 146, CI Pigment Red 169, CI Pigment Red 81: 2, CI. Pigment Red 176, CI Pigment Red 184, CI Pigment Red 185, CI Pigment Red 202, CI.
- Pigment Red 208 CI Pigment Red 57: 1, CI Pigment Violet 32, CI Pigment Violet 19, CI Pigment Yellow 73, CI Pigment Yellow 109, CIPigment Yellow 110, CI .Pigment Yellow 128, CIPigment Yellow 129, CI .Pigment Yellow 138, CIPigment Yellow 150, CIPigment Yellow 151, CI .Pigment Yellow 154, CIPigment Yellow 155, CIPigment Yellow One or more selected from 180, CI Pigment Yellow 185 and the like are preferable.
- the polymer compound includes a vinyl polymer compound, a polyester, a polyamide, a polyimide, a polyurethane, an amino polymer compound, a silicon-containing polymer, a sulfur-containing polymer, a fluorine-containing polymer, and an epoxy resin.
- a vinyl polymer compound examples include poly (meth) acrylate, styrene- (meth) acrylic acid copolymer, styrene- (meth) acrylic ester copolymer, and styrene- (meth) acrylic ester.
- (Medium) Acrylic acid copolymer (Medium) Acrylic acid copolymer, styrene-maleic acid copolymer, styrene-maleic acid ester-maleic acid copolymer, styrene-itaconic acid copolymer, styrene-itaconic acid ester Itaconic acid copolymer, styrene mono (meth) acrylate-itaconic acid copolymer, styrene-fumaric acid copolymer, styrene-fumaric acid ester-fumaric acid, and the like.
- the average particle size of the microencapsulated pigment obtained by coating the pigment with the polymer compound is preferably 400 nm or less, more preferably 200 nm or less.
- the microencapsulated pigment any one can be used as long as it is produced by the above method.
- a method of coating the pigment with a polymer compound by an emulsion polymerization method using a polymerizable surfactant for example, aqueous dispersions of pigments as microencapsulated pigments obtained by the methods disclosed in JP-A-5-320276 and JP-A-10-316909 It is better to use In this case,
- the flow characteristics at 20 ° C. and the dynamic viscosity characteristics of the ink composition satisfy the flow characteristics described above in the first to third ink sets and the dynamic viscosity characteristics described above in the fourth ink set. Can be easily adjusted.
- the aqueous dispersion of the pigment referred to here is a fine and stable dispersion of a pigment in which the pigment is encapsulated by a polymerizable surfactant having both anionic and nonionic hydrophilic properties and a polymer of a monomer.
- Encapsulated particles “Water-based dispurgeon of pigments” is one in which fine and stable encapsulated particles of pigment are stably dispersed in an aqueous medium.
- the polymerizable surfactant which has both anionic and nonionic hydrophilic properties, adsorbs on the surface of the pigment particles, and has good dispersion stability (that is, it can prevent aggregation of the particles) even under subsequent polymerization conditions. Since it is excellent, it is advantageous in that it is easy to form encapsulated particles.
- a compound represented by the following formula (1) is preferable as the polymerizable surfactant having both anionic and nonionic hydrophilicity used in the aqueous dispersion of the pigment.
- the polymerizable surfactant represented by the following formula (1) is disclosed in JP-A-5-320276 and JP-A-10-310690.
- the polymerizable surfactant represented by the formula (1) include compounds represented by the following formulas (2) to (5). These may be used alone or as a mixture of two or more.
- the polymerizable surfactant can be homopolymerized, but is preferably a copolymer.
- the amount of the polymerizable surfactant to be added is preferably in the range of about 10 to 150% by weight, more preferably in the range of about 20 to 100% by weight, based on the pigment.
- the amount is 10% by weight or more, the dispersion stability of the ink composition can be improved.
- by setting the amount of addition to 150% by weight or less it is possible to suppress the generation of a non-adsorbed polymerizable surfactant with the pigment, and to prevent the generation of a polymer other than the capsule particles. As a result, The ejection stability of the ink composition can be improved.
- monomers used with the polymerizable surfactant include polymerizable surfactants.
- a monomer to be used is preferably a monomer having a high electron-accepting property.
- monomers having a high electron-accepting property include fumaric acid diesters such as acrylonitrile, fumarononitrile, and dibutyl fumarate; maleic diesters such as maleic dibutyl ester; and N-phenylmaleimide. Maleimides; and vinylidene cyanide. These may be used alone or as a mixture of two or more.
- the amount of the monomer to be added is preferably in the range of about 2 to 15 mole ratio, more preferably in the range of about 3 to 12 mole ratio, based on the polymerizable surfactant.
- the encapsulated pigment particles formed have excellent dispersion stability in an aqueous medium.
- the monomer can be sufficiently dissolved in the polymerizable surfactant adsorbing layer, and the generation of a water-insoluble polymer can be suppressed. Since the decrease in the amount of the ionic repulsive group can be suppressed, the dispersion stability of the ink composition can be improved.
- the polymerization initiator used here may be potassium persulfate or ammonium persulfate. Platinum, sodium persulfate, 2,2-azobis- (2-methylpropionamidine) dihydrochloride, or 4,4-azobis-mono (4-cyanovaleric acid).
- Such a microencapsulated pigment is obtained by the following method.
- a pigment and a polymerizable surfactant having a radical polymerizable double bond in the molecule Gazette, Japanese Patent Publication No. 1-241402, Japanese Patent Application Laid-Open No. 62-104,022, Japanese Patent Application Laid-Open No. 62-214, 311, Japanese Patent Application 62 — Japanese Patent Publication No. 34974, Japanese Patent Application Laid-Open No. 551-111525, Japanese Patent Publication No. 46-34898, Japanese Patent Application Laid-Open No.
- the pigment particles are completely covered with the polymer compound (there are no defective portions), and the hydrophilic groups in the structure of the polymer compound are regularly formed on the particle surface by water. It is considered to be oriented toward the phase and has high dispersion stability.
- the flow property and the dynamic viscoelastic property at 20 ° C. of the ink composition can be improved by using the above-mentioned flow property and fourth ink set in the first to third ink sets. Can be easily adjusted to satisfy the above-mentioned dynamic viscoelastic properties in the case.
- a microencapsulated pigment was obtained by performing a crosslinking reaction after including a coloring material in an organic phase containing at least a crosslinking agent and the above-described polymer compound having a crosslinking reactive group and a hydrophilic group. Those coated with a polymer compound having a crosslinked structure can also be used.
- Such a microencapsulated pigment can be obtained by coating the coloring material by phase inversion emulsification using a polymer compound having a crosslinking reactive group and a hydrophilic group, and further performing a crosslinking reaction with a crosslinking agent. it can.
- a solution or dispersion obtained by adding a polymer having a colorant, a cross-linking reactive group and a hydrophilic group and a cross-linking agent to an organic solvent and a neutralizing agent and, if necessary, a surfactant It is preferable to use a reactive surfactant as the surfactant.
- the mixture obtained by adding the above is used as an organic solvent phase, and the organic solvent phase is added to the organic solvent phase while stirring either the organic solvent phase or water.
- phase inversion emulsification is carried out, and the coloring material is formed of an organic compound comprising a polymer compound having a crosslinking reactive group and a hydrophilic group and a crosslinking agent.
- the catalyst that causes the cross-linking reaction may be added to either the organic solvent phase or the aqueous phase, but if the catalyst is oil-soluble, it may be added to the organic solvent phase. It is preferred to add to the phase.
- the organic solvent is distilled off by a general method such as a distillation method or a reduced pressure distillation method, and the color is formed with a polymer compound having a crosslinked structure. It is possible to obtain a dispersion in which the coloring agent containing the material is dispersed in the aqueous phase.
- the hydrophilic group of the above polymer compound is a sulfonic group, a sulfonic group, a carboxyl group And salts thereof, and are selected from these.
- the cross-linking reactive group of the above-mentioned polymer compound includes a glycidyl group, an isocyanate group, a hydroxyl group, a carboxyl group, an unsaturated hydrocarbon group and the like, and is selected from these.
- the unsaturated hydrocarbon group include a vinyl group, an aryl group, an acryloyl group, a methacryloyl group, a propyl group, a vinylidene group, and a vinylene group, and are selected from these.
- a vinyl polymer compound, poly (meth) acrylate, or styrene-mono (meth) acrylate copolymer is used as the polymer compound.
- a polymer compound includes a (meth) acrylic acid ester monomer having at least one hydrophilic group selected from the group consisting of a sulfone group, a sulfonic acid group, a lipoxyl group, and a salt thereof, a glycidyl group, an isocyanate
- a (meth) acrylic acid ester monomer having a cross-linking reactive group such as a group, and a monomer copolymerizable with these monomers are combined with t-butylperoxybenzoate, g-t-butylperoxide, cumene-hydroxyhydroxide, and acetyl-peroxide.
- Polymerization initiators such as peroxides such as oxoxide, benzoyl peroxide and lauroyl peroxide, azo compounds such as azobisisobutyl nitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarnitritol and the like.
- peroxides such as oxoxide, benzoyl peroxide and lauroyl peroxide
- azo compounds such as azobisisobutyl nitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarnitritol and the like.
- aromatic hydrocarbons Solvents can be obtained by performing ester solvents, ketone solvents, alcohol solvents, the solution polymerization in a solvent such as a non-pro ton based SOLVENTS.
- a polymerization chain transfer agent may be further added.
- polymerization chain transfer agent examples include mercaptans such as octyl mercaptan, n-dodecyl mercaptan, t-dodecyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl mercaptan, and t-tetradecyl mercaptan.
- mercaptans such as octyl mercaptan, n-dodecyl mercaptan, t-dodecyl mercaptan, n-hexadecyl mercaptan, n-tetradecyl mercaptan, and t-tetradecyl mercaptan.
- Xanthogen disulfides such as dimethyl xanthogen disulfide, getyl xanthogen disulfide and diisopropyl xanthogen disulfide; tetramethylthiuram disulfide, tetraethylthiuram disulfide, tetrabutylthiuram disulfide Thiuram disulfides; halogenated hydrocarbons such as carbon tetrachloride and ethylene bromide; hydrocarbons such as pentaphenylethane
- acrolein methacrolein, aryl alcohol, 2-ethylhexyl thioglycolate, yuichi pinoren, hiichiterbinen, arterbinene, dipen ⁇ -methylstyrene dimer (2,4-diphenyl-1-methyl-1-pentene is preferably 50 parts by weight or more), and 9,10-diethylanthracene, 1,4-diethyl Unsaturated cyclic hydrocarbon compounds such as dronaphthalene, indene, and 1,4-cyclohexadiene; and unsaturated heterocyclic compounds such as xanthene and 2,5-dihydrofuran. These may be used alone or in combination of two or more.
- the polymerization is carried out usually at 30 to 90 ° C., preferably at 50 to 80 ° C. for 1 to 10 hours, and is appropriately selected depending on the type of radical polymerization initiator, monomer, solvent and the like to be used. .
- the polymerization is preferably performed in an atmosphere of an inert gas such as nitrogen.
- the copolymer can be isolated from the reaction solution by a known method such as reprecipitation or solvent evaporation. Further, the obtained copolymer can be purified by removing unreacted monomers and the like by reprecipitation, membrane separation, chromatography, extraction, or the like.
- the weight average molecular weight of the polymer compound thus obtained is preferably 100 to 500, more preferably 100,000, from the viewpoint of the ease of including the coloring material and the ease of crosslinking. It is preferably ⁇ 3000.
- Examples of the (meth) acrylic acid ester monomer having a hydrophilic group include acrylic monomers having a carboxyl group, such as acrylic acid, methacrylic acid, crotonic acid, ethacrylic acid, propylacrylic acid, isopropylacrylic acid, and Conic acid, fumaric acid, and the like. Of these, acrylic acid and methacrylic acid are preferred.
- Examples of the (meth) acrylic monomer having a sulfonic acid group include sulfoethyl methacrylate and butyl acrylamide sulfonic acid.
- As the (meth) acrylic monomer having a phosphone group for example, phosphoshethyl methacrylate and the like can be mentioned.
- Examples of the (meth) acrylic acid ester monomer having a crosslinking reactive group include a polymerizable monomer having a block isocyanate group, a monomer having an epoxy group, and a 1,3-dioxolan-12-one-14-yl group. Monomers and the like.
- a polymerizable monomer having a block isocyanate group for example, a known block agent is added to a polymerizable monomer having an isocyanate group such as 2-methacryloyloxyshethyl isocyanate. Can be easily obtained by reacting You.
- a compound having an isocyanate group and a block isocyanate group can also be produced by adding a compound having an isocyanate group and a block isocyanate group to a vinyl copolymer having a hydroxyl group and a hydroxyl group and an addition reaction.
- the monomer having an epoxy group include glycidyl (meth) acrylate and a (meth) acrylate monomer having an alicyclic epoxy group.
- Monomers having a 1,3-dioxolan-1-2-one-4-yl group include, for example, 1,3-dioxolan1-2-one-4-ylmethyl (meth) acrylate, 1,3-dioxolan 1-2-one 14-methyl-vinyl ether and the like.
- monomers that can be copolymerized with these monomers include the following.
- the crosslinking agent reacts with the crosslinking reactive group of the polymer compound to crosslink, and has at least two or more functional groups in the molecular structure that react with the crosslinking reactive group of the polymer compound. Is used.
- the crosslinking reactive group of the polymer compound is a glycidyl group, it has two or more functional groups selected from an amino group, a carboxyl group, a hydroxyl group, an N-methylol group, and an N-methylol ether group.
- a compound for example, aliphatic amines such as ethyleneamine group, N-aminoethylpiperazine, metaxylene diamine, 1,3-bis (aminomethyl) cyclohexane, and polyamide; Cycloaliphatic amines such as paramendiamine, mesophoronediamine, bis (4-amino-3-methylcyclohexyl) methane, 2-ethyl-4-methylimidazole; metaphenylenediamine, 4,4, jia Aromatic amines such as minodiphenylamine, 4,4 'diaminodiphenylsulfone, dicyandiamide; phthalic anhydride; Water Pirome Li Tsu DOO acid, acid anhydrides such as nadic anhydride, and the like.
- aliphatic amines such as ethyleneamine group, N-aminoethylpiperazine, metaxylene diamine, 1,3-bis (aminomethyl
- crosslinking reactive group of the polymer compound is an isocyanate group
- crosslinking reactive group of the polymer compound is a hydroxyl group
- the cross-linking reactive group of the polymer compound is an unsaturated hydrocarbon group, at least one kind selected from a vinyl group, an aryl group, an acryloyl group, a methacryloyl group, a propylenyl group, a vinylidene group and a vinylene group. It is preferable to use a compound having two or more saturated hydrocarbon groups.
- a compound having two or more saturated hydrocarbon groups include ethylene glycol diacrylate, ethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, and polyethylene glycol diacrylate.
- Lyl acrylate bis (acryloxyshethyl) hydroxyethyl isocyanurate, bis (acryloxyneopentyl glycol) adipate, 1,3-butyleneglycol diacrylate, 1,6-hexanediol di Acrylate, Neo Methyl glycol diacrylate, propylene glycol diacrylate, polypropylene glycol diacrylate, 2-hydroxy-1,3, -diacryloxypropane, 2,2-bis [41- (acryloxy) phenyl] propane, 2,2-bis [4-1 (acryloxyethoxy) phenyl] propane, 2, 2-bi S [4-1 (acryloxyethoxy'diethoxy) phenyl] propane, 2,2-bis [4- (acryloxyethoxy'polyethoxy) phenyl] propane, neopentylglycolylhydroxylhydroxylate, 1,4-butanediol — rudiacrylate, dicyclopentyl diphenylate,
- the crosslinking agent is preferably added to the organic solvent phase in a weight ratio of 0.01 to 0.1 with respect to the polymer compound having a crosslinking reactive group and a hydrophilic group.
- a value of less than 0.01 is not preferred because viscosity may increase over a long period of time, nozzle clogging may occur, and ejection stability may be poor.
- the ratio exceeds 0.1, the abrasion resistance is reduced and the particle diameter is increased.
- the catalyst used for the cross-linking reaction may be any compound that has the effect of inducing or accelerating the reaction.
- the crosslinking reactive group of the polymer compound is an unsaturated hydrocarbon group, and the crosslinking agent is at least one selected from a vinyl group, an aryl group, an acryloyl group, a methacryloyl group, a propylenyl group, a vinylidene group, and a vinylene group.
- Peroxides such as tert-butyl peroxide, cumene hydroxy, acetyl peroxide, benzoyl peroxide, lauroyl peroxide, etc. It is possible to use any of oil-soluble radical polymerization initiators for azo compounds such as hexane nitrile and water-soluble radical polymerization initiators for potassium persulfate, asimodium persulfate, and sodium persulfate. it can. Note that the amount of the catalyst to be added is appropriately determined.
- the organic solvent used in the organic solvent phase is not particularly limited as long as it can dissolve the polymer compound having at least the crosslinking reactive group and the hydrophilic group.
- an organic solvent having a low boiling point is preferred.
- examples thereof include ketone organic solvents such as acetone and methyl ethyl ketone, ester organic solvents such as ethyl acetate, alcohol organic solvents such as ethanol and isopropyl alcohol, and aromatic hydrocarbon organic solvents such as benzene.
- the polymer compound having a cross-linking reactive group and a hydrophilic group is appropriately determined in a weight ratio of 0.3 to 1.5 with respect to the colorant, but the average particle diameter of the colorant is 400 nm or less, preferably 200 nm or less, so that the water-soluble substance derived from the high molecular compound having a cross-linking reactive group and a hydrophilic group in the aqueous phase after production is 100 ppm or less. It is preferable to make adjustments and decide.
- a mixed solution containing at least a cross-linking agent and a polymer compound having a colorant, a cross-linking reactive group and a hydrophilic group in an organic solvent a bead mill, a roll mill, a sand mill, etc.
- the above-mentioned polymer compound having a cross-linking reactive group and a hydrophilic group is dispersed in an organic solvent phase in which the polymer compound having a cross-linking reactive group and a hydrophilic group is dissolved, and then a cross-linking agent and, in some cases, an oil-soluble catalyst are used.
- a dispersant or a surfactant is used for the purpose of increasing the dispersibility of the pigment.
- a polymerizable surfactant is preferably used.
- the reactive surfactant is the same as the polymerizable surfactant described later.
- the polymerizable surfactant a polymer compound having a cross-linking reactive group and a hydrophilic group or a compound which reacts with a cross-linking agent is used.
- a polymer compound having a cross-linking reactive group and a hydrophilic group or a compound which reacts with a cross-linking agent is used.
- microencapsulated pigment it is preferable to use a pigment coated with a polymer compound of a monomer and a polymerizable surfactant having a polymerizable group, a hydrophobic group and a hydrophilic group.
- the polymerizable surfactant has a hydrophobic group, a hydrophilic group, and a polymerizable group in a molecule, and the hydrophilic group includes a sulfone group, a sulfonic group, a carbonyl group, a carboxy group, and the like. It has at least an anionic group selected from the group consisting of salts.
- the polymerizable group is an unsaturated hydrocarbon group, and more specifically, is selected from the group consisting of vinyl group, aryl group, acryloyl group, methacryloyl group, propenyl group, vinylidene group, and vinylene group. Preferably, there is.
- JP-B-49-46291 JP-B-11-24142
- JP-A-62-1040480 Anionic allyl derivatives as described in Japanese Unexamined Patent Publication (Kokai) No. 2 (1990) -1994, and anionic anionic propenyl derivatives as described in Japanese Unexamined Patent Publication (Kokai) No. Sho.
- JP-A-55-11525, JP-B-46-349898 Anionic an itaconic acid derivative as described in JP-A-51-304284, JP-B-51-41557, JP-A-51-304284
- Anionic maleic acid derivative as described in Japanese Patent Application Publication A nonionic allyl derivative as described in Japanese Patent Application Laid-Open No. 62-104802, a nonionic propenyl derivative as described in Japanese Patent Application Laid-Open No. 62-050502, Nonionic acrylic acid derivatives as described in JP-A-56-28208, nonionic itaconic acid derivatives as described in Japanese Patent Publication No. 59-128681, Nonionic maleic acid derivatives as described in JP-A-59-74102 are exemplified.
- the polymerizable surfactant is adsorbed on the surface of the pigment particles, and has excellent dispersion stability (that is, can prevent aggregation of the particles) even under the subsequent polymerization conditions, thereby forming encapsulated particles. This is advantageous in that it is easy.
- the polymerizable surfactant a compound represented by the following formula (1) is preferable.
- the polymerizable surfactant represented by the formula (1) is disclosed in JP-A-5-320276 and JP-A-10-316909.
- the polymerizable surfactant represented by the formula (1) include compounds represented by the following formulas (2) to (5). These may be used alone or as a mixture of two or more.
- a pigment is coated with a polymer compound which is a copolymer of a polymerizable surfactant, a crosslinkable monomer, and a monomer copolymerizable therewith, and a microscopic and stable capsule. Particles are used.
- a micro-mouth encapsulated pigment is stably dispersed in an aqueous medium.
- the polymerizable surfactant represented by the formula (1) has a property of adsorbing to the surface of the coloring material particles and a dispersion stability under the subsequent polymerization conditions (that is, it is possible to prevent the aggregation of the particles). ), which is advantageous in that it is easy to form encapsulated particles. It is.
- Polymerizable surfactants can also be used in commercial products.
- the AQUALON HS series (AQUALON HS-05, HS-10, HS-20, HS-125) of Daiichi Kogyo Co., Ltd.
- AQUALON RN series (RN-10, RN-20, RN-30, RN-50, RN-2025), New Frontier Series (New Frontier N-177E, S-510), Asahi Denka Co., Ltd.
- Adecaria Soap NE Series (NE-10, NE-20, NE-30, NE-40, NE-50).
- the amount of the polymerizable surfactant to be added is preferably in the range of about 10 to 150% by weight, more preferably in the range of about 20 to 100% by weight, based on the colorant.
- the amount is 10% or more, the dispersion stability of the ink composition can be improved.
- the addition amount is 150% or less, the generation of a non-adsorbed polymerizable surfactant with the coloring material can be suppressed, and the generation of a polymer other than the capsule particles can be prevented.
- the ejection stability of the ink composition can be improved.
- a generally used radically polymerizable monomer can be used.
- styrene derivatives such as styrene and methylstyrene, dimethylstyrene, chlorostyrene, dichlorostyrene, bromostyrene, P-chloromethylstyrene, dihinylbenzene; methyl acrylate, ethyl acrylate, n-butyl acrylate, butoxy Tyl acrylate, benzyl acrylate, phenyl acrylate, phenoxshetyl acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, dicycloventenyl acrylate, dicyclopentenyloxy Simple substances such as tyl acrylate, tetrahydrofurfuryl acrylate, isobornyl acrylate, 2-hydroxyl acetyl acrylate, 2-hydroxy propyl
- acrylates methyl methacrylate, methyl methacrylate, n-butyl methyl methacrylate, 2-ethylhexyl methacrylate, butoxymethyl methacrylate, benzyl methacrylate, phenyl methacrylate, phenyl methacrylate, cyclohexyl methacrylate Xyl, dicyclopentenyl methacrylate, dicyclopentenyl methacrylate, dicyclopentenyloxyshetti Methacrylate, tetrahydrofurfuryl methyl methacrylate, lipornyl methacrylate, 2-hydroxyshethyl methacrylate, 2-hydroxypropyl methacrylate, 2-hydroxybutyl methacrylate, glycerol methacrylate, cabrolactone methacrylate Monofunctional methacrylates such as acrylates and glycidyl methacrylates; aryl benzene, arylu 3-cyclohexaneprob
- Monomers having a local polymerizable group Since the polymerizable surfactant represented by the formula (I) is a monomer having a high electron donating property, a monomer to be used is preferably a monomer having a high electron accepting property. Specific examples of monomers having a high electron accepting property include: fumaric acid diesters such as acrylonitrile, fumalononitrile, and dibutyl fumarate; maleic acid diesters such as dibutyl maleate; N-phenylmaleimide. Maleimides; and vinylidene cyanide. These may be used alone or as a mixture of two or more.
- the amount of the monomer to be added is preferably in the range of about 2 to 15 mole ratio, more preferably in the range of about 3 to 12 mole ratio, based on the amount of the polymerizable surfactant.
- the added amount is 2 mole ratio or more
- the capsule colorant particles formed have excellent dispersion stability in an aqueous medium.
- the monomer can be sufficiently dissolved in the polymerizable surfactant adsorbing layer, generating a water-insoluble polymer and relatively ionic repulsion. Since the decrease in the amount of the group can be suppressed, the dispersion stability of the ink composition can be improved.
- acrylic monomers having a carboxyl group include, for example, acrylic acid, methacrylic acid, crotonic acid, ethacrylic acid, propylacrylic acid, isopropylacrylic acid, itaconic acid, fumaric acid, and the like. Among these, acrylic acid and methacrylic acid are preferred.
- Sulfone Examples of the (meth) acrylic monomer having an acid group include sulfoethyl methacrylate and butylacrylamide sulfonic acid.
- examples of the (meth) acryl monomer having a phosphone group include phosphoethyl methacrylate.
- any one can be used as long as it has high copolymerizability with the polymerizable surfactant. It is preferable to use a compound having two or more unsaturated hydrocarbon groups of at least one kind selected from a vinyl group, an acrylyl group, an acryloyl group, a methyl acryloyl group, a propylenyl group, a vinylidene group, and a vinylene group.
- Ethylene glycol diacrylate diethylene glycol diacrylate, triethylene glycol diacrylate, tetraethylene glycol diacrylate, polyethylene glycol diacrylate, arylyl acrylate, bis (acryloxyshetyl) hydroxitytyl isocyanurate, bis
- water-soluble polymerization initiators such as potassium persulfate, ammonium persulfate, and sodium persulfate are used.
- the pigment particles are made of a polymer compound. It is thought that the hydrophilic groups in the structure of the polymer compound are completely oriented toward the aqueous phase on the particle surface in addition to being completely covered (there are no defective parts), and high dispersion stability is obtained. Have. Furthermore, when such a polymer compound has a crosslinked structure, the orientation of the hydrophilic group toward the aqueous phase is further improved, so that the dispersion stability is further improved, and the solvent resistance of the coated polymer is also improved.
- the ink composition can achieve excellent storage stability without pigment aggregation or viscosity increase during long-term storage.
- the flow properties and dynamic viscoelastic properties of the ink composition at 20 ° C. can be improved by using the flow properties described above in the first to third ink sets and the flow properties in the fourth ink set. It can be easily adjusted to satisfy the dynamic viscoelastic properties described above.
- a dispersant is added to the ink composition to completely remove the colorant. It is preferred to disperse in an aqueous medium.
- a dispersant used here for example, a polymer dispersant and a surfactant can be used.
- Preferred examples of the polymer dispersant include natural polymers, and specific examples thereof include proteins such as glue, gelatin, casein, and albumin; natural rubbers such as arabic gum and tragacanth gum; glucosides such as savonin; Alginic acid and propylene glycol alginate; alginic acid derivatives such as triethanolamine alginate and ammonium alginate; and cellulose derivatives such as methylcellulose, carboxymethylcellulose, hydroxyethylcellulose, and ethylhydroxyl cellulose.
- Preferred examples of the polymer dispersant include synthetic polymers, such as polyvinyl alcohols, polyvinyl alcohols, polyacrylic acid, acrylic acid-acrylonitrile copolymer, and potassium acrylate.
- Acrylic resins such as acrylonitrile copolymer, vinyl acetate-acrylic acid ester copolymer, acrylic acid-acrylic acid ester copolymer, styrene-acrylic acid copolymer, styrene-methacrylic acid copolymer Styrene-acrylic resin such as styrene-methacrylic acid-acrylic acid ester copolymer, styrene- ⁇ -methylstyrene-acrylic acid copolymer, styrene-monomethylstyrene-acrylic acid-acrylic acid ester copolymer, Styrene-maleic acid copolymer, Styrene-maleic anhydride copolymer, vinyl naphthale One Akuriru acid copolymers, vinyl naphthalene one maleic acid copolymers, and vinyl acetate-ethylene copolymer, Vinyl acetate copolymers such as vinyl acetate-fatty acid vinylethylene cop
- a copolymer of a monomer having a hydrophobic group and a monomer having a hydrophilic group, and a polymer composed of a monomer having both a hydrophobic group and a hydrophilic group in a molecular structure are preferable.
- the polymer may be any of a random copolymer and a block copolymer.
- the above salts include salts such as getylamine, ammonia, ethylamine, triethylamine, propylamine, isopropylamine, dipropylamine, butylamine, isobutylamine, triethanolamine, diethanolamine, aminomethylpropanol, and morpholine.
- These compounds for forming the salt may be at least the neutralization equivalent of the dispersant composed of the organic substance before the salt is formed, but from the viewpoint of fixability after printing, about 1.3 times the neutralization equivalent. Is preferable.
- copolymers preferably have a weight-average molecular weight of 1,000 to 500,000, and more preferably 300 to 1,000.
- surfactants that are preferred as dispersants include, but are not limited to, alkyl sulfonate, or-olefin sulfonate, alkyl benzene sulfonate, alkyl naphthalene sulfonic acid, acyl methyl taurate, and dialkyl sulfonate.
- Sulfonic acid type such as sulfosuccinic acid, alkyl sulfate ester salt, sulfated oil, sulfated olefin, polyoxyethylene alkyl ether sulfate salt; carponic acid type such as fatty acid salt, alkyl sarcosine salt, etc .; alkyl phosphate ester salt Phosphoric acid ester type such as polyoxyethylene alkyl ether phosphate salt, monoglycerite phosphate ester salt, etc .; anionic surfactants represented by; and pyridium type such as alkylpyridium salt; alkylamino acid salt etc.
- Amino acid type Zwitterionic surfactants represented by betaine type such as alkyl dimethyl betaine, etc., polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ester, polyoxyethylene Ethylene oxide addition type such as alkylamide; Polyester type such as glycerin alkyl ester, sorbitan alkyl ester and sugar alkyl ester; Polyether type such as polyhydric alcohol alkyl ester; Nonionic surfactants represented by alkanol amides such as norlamine fatty acid amide; and the like.
- the addition amount of these dispersants is preferably about 1 to 50% by weight, more preferably 2 to 30% by weight, based on the colorant.
- a salt of a styrene- (meth) acrylic acid copolymer is used as the dispersant.
- a styrene- (meth) acrylic acid copolymer salt basically shows at least a styrene skeleton and a (meth) acrylic acid salt skeleton in its structure, and the structure has (meth) It may have a skeleton derived from a monomer having another unsaturated group such as an acrylate skeleton.
- Such a styrene- (meth) acrylic acid copolymer salt may be any of a random copolymer and a block copolymer, and is produced by a known polymerization method such as radical copolymerization or group transfer polymerization.
- the acid value of the styrene- (meth) acrylic acid copolymer salt is preferably in the range of 50 to 300, more preferably in the range of 70 to 150.
- the molecular weight is preferably in the range of 1000 to 500,000 in terms of weight average molecular weight, more preferably in the range of 1000 to 1500, and still more preferably in the range of 300 to 1,000. It is in the range of 0 0 0 0.
- dispersant commercially available ones can be used. Specific examples thereof are Johnson Polymer Co., Ltd., Jon Krill 68 (molecular weight 100,000, acid value 195), Jon Krill 680 (molecular weight 3900, acid value 2 15), Joncryl 680 (molecular weight 1600, acid value 235), john krill 550 (molecular weight 7500, acid value) 200), Joncryl 555 (molecular weight 50,000, acid value 200), Joncryl 586 (molecular weight 310, acid value 105), Joncryl 683 (molecular weight) 730, acid value 150), B-36 (molecular weight 680, acid value 250) and the like.
- the colorant, the above-mentioned dispersant, water and, if necessary, a water-soluble organic solvent are mixed with a pole mill, sand mill, attritor, roll mill, agitator mill, Henschel mixer, colloid mill, ultrasonic wave It is carried out with an appropriate dispersing machine such as a homogenizer, a jet mill and an ang mill.
- the ink composition constituting the ink set of the present invention usually contains water as a solvent. And a water-soluble organic solvent.
- the water and the water-soluble organic solvent are, for example, an aqueous medium used for dispersing the colorant.
- the ink composition preferably contains a polar solvent.
- the polar solvent include 2-pyrrolidone, N-methylpyrrolidone, £ -force prolactam, dimethyl sulfoxide, sulfolane, morpholin, N-ethylmorpholine, 1,3-dimethyl-2-imidazolidinone, and the like. The above is selected and used.
- the content of these polar solvents is preferably in the range of 0.01 to 20% by weight, more preferably 1 to 10% by weight, based on the ink composition.
- the flow characteristics and dynamic viscoelastic properties at ° C are appropriately determined so as to satisfy the above-mentioned flow characteristics in the first to third ink sets and the above dynamic viscoelastic properties in the fourth ink set. Is done.
- the water-soluble organic solvent preferably further comprises the following.
- the ink composition preferably contains a wetting agent composed of a high-boiling water-soluble organic solvent in order to provide water retention and wettability of the ink composition.
- a wetting agent composed of a high-boiling water-soluble organic solvent in order to provide water retention and wettability of the ink composition.
- the solvent include ethylene glycol. , Diethylene glycol, triethylene glycol, polyethylene glycol, polypropylene glycol, propylene glycol, butylene glycol, 1,2,6-hexanetriol, thioglycol, hexylene glycol, glycerin, trimethylolpropane, etc. And polyhydric alcohols. Among them, a water-soluble organic solvent having a boiling point of 180 ° C. or more is preferable. These high-boiling water-soluble organic solvents can be used alone or in combination of two or more.
- the content of these high-boiling water-soluble organic solvents is preferably in the range of about 0.01 to 20% by weight, more preferably in the range of 5 to 20% by weight, based on the ink composition. .
- the ink composition further contains glycoethers. It is preferable to use an acetylene glycol compound as a surfactant in combination.
- the ink composition further contains 1,2-alkyldiol.
- the ink composition preferably contains a surfactant, particularly an anionic surfactant and / or a nonionic surfactant.
- anionic surfactants include sulfonic acids such as alkane sulfonates, polyolefin sulfonates, alkylbenzene sulfonates, alkyl naphthalene sulfonates, acyl methyl taurates, and dialkyl sulfosuccinates.
- the nonionic surfactant include an ethylene oxide addition type such as polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl ester, and polyoxyethylene alkyl amide.
- Polyol ester types such as glycerin alkyl ester, sorbitan alkyl ester and sugar alkyl ester; polyether type such as polyvalent alcohol alkyl ester; alkanol amide type such as alkanolamine fatty acid amide; .
- the content of these surfactants is preferably in the range of 0.1 to 10% by weight, more preferably 0.1 to 5% by weight, based on the ink composition.
- the flow characteristics and the dynamic viscoelasticity at ° C are appropriately determined so as to satisfy the flow characteristics in the first to third ink sets and the dynamic viscoelastic characteristics in the fourth ink set.
- the ink composition preferably contains an acetylene glycol compound as a surfactant.
- an acetylene glycol compound By adding an acetylene glycol compound, the penetrability of the ink composition into the recording medium can be increased. Printing with little bleeding on the recording medium can be expected.
- Preferred specific examples of the acetylene glycol compound used in the present invention include a compound represented by the following formula (6).
- m and n are numbers satisfying 0 ⁇ m + n ⁇ 50, respectively.
- R i, R 2 , R 3 and R 4 are each independently an alkyl group (preferably an alkyl group having 6 or less carbon atoms).
- the compounds represented by the above formula (6) particularly preferred are 2,4,7,9-tetramethyl-15-decyne-14,7-diol, 3,6-dimethyl-4-octyne-13, 6-diol, 3,5-dimethyl-11-hexyn-1-ol, and the like.
- a commercially available product as an acetylene glycol-based surfactant, and specific examples thereof include safinol 104, 82 , 465, 485 or TG (both are Air Products and Chemicals. In), Orfin STG, and Orfin E1010 (all trade names manufactured by Nissin Chemical Co., Ltd.).
- the ink composition preferably further contains a penetrant.
- the penetrant include ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monoethyl ether, ethylene glycol monomethyl ether acetate, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, and ethyl ether.
- Lenglycol mono-n-propyl ether ethylene glycol mono-iso-propyl ether, diethylene glycol mono-iso-propyl ether, ethylene glycol mono-n-butyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol mono-n-butyl ether, ethylene glycol mono T-butyl ether, butylene glycol mono-t-butyl ether, 1-methyl-1-methoxy Tanol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol mono-t-butyl ether, propylene glycol mono-n-propyl ether, propylene glycol mono-iso-propyl ether, dipropylene glycol Recohol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n-propyl ether, dipropylene glycol mono-iso-propyl ether,
- propylene glycol Monobutyl ether dipropylene glycol monobutyl ether, diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, 1,2-pentyldiol, and 1,2-hexanediol are preferred.
- the content of these penetrants is preferably 0 to 20% by weight in the ink composition. It is more preferably 0 to 10% by weight, and the flow characteristics of the ink at 20 ° C. are appropriately determined so as to satisfy the above-mentioned flow characteristics in the first to fourth ink sets.
- each of the ink compositions preferably has a surface tension of 20 to 45 mN / m, and more preferably 30 to 40 mN / m. If the surface tension is less than 20 mN / m, the ejection stability may be reduced due to wetting around the head nozzle.If it exceeds 45 mN / m, bleeding may occur on plain paper, In the case of multicolor printing, a predication may occur.
- the preferred composition of the ink composition is as follows.
- Pigment or dye insoluble or hardly soluble in water 1 to 10% by weight
- Pigment or water-insoluble or slightly soluble dye 1 to 10% by weight
- a preferred composition of the above-mentioned ink composition when a self-dispersion pigment whose surface is hydrophilized is used, in particular, is as follows.
- Self-dispersed pigment whose surface has been hydrophilized; 3 to 8% by weight
- the wetting agent used in the above preferred composition may be appropriately selected from the above-mentioned high-boiling water-soluble solvents and used.
- glycerin ethylene glycol, diethylene glycol, triethylene glycol, and polyethylene glycol And the like. Further, it is preferable to use 5 to 15% by weight of glycerin from the viewpoint of ink clogging reliability.
- the water-soluble polar solvent may be appropriately selected from the above examples and used, but is preferably 2-pyrrolidone or 1,3-dimethyl-2-imidazolidinone.
- the surfactant may be appropriately selected from the above examples and used, but an anionic surfactant and / or a nonionic surfactant is preferable, and further, a nonionic surfactant is acetylene glycol. More preferably, a surfactant is used.
- the penetrant may be appropriately selected from the above examples, but is preferably diethylene glycol monobutyl ether, triethylene glycol monobutyl ether, 1,2-pentanediol, or 1,2-hexanediol.
- the flow characteristics and dynamics of the ink composition at 20 ° C are adjusted.
- the viscoelastic properties can be easily adjusted so as to satisfy the above-mentioned fluid viscoelastic properties in the first to third ink sets and the above-mentioned dynamic viscoelastic properties in the fourth ink set.
- the ink composition has a surface tension at 20 ° C. of 20 to 45 mN. / m is also adjusted.
- the preferred composition of the ink composition in the case of using a pigment dispersed in an aqueous medium by a dispersant or a dye insoluble or hardly soluble in water is as follows. Pigment or water-insoluble or slightly soluble dye; 1 to 5% by weight
- a polymer dispersant or a surfactant is used as the dispersant used in the above preferred composition.
- a salt of a polymer compound having a site having an aromatic ring or an aliphatic ring in the molecule and at least a site having a hydroxyl group and / or a sulfonic acid group in the molecule is preferable.
- wetting agent the water-soluble polar solvent, and the surfactant are the same as those in the preferred composition in the case where the self-dispersion pigment whose surface is hydrophilized is used.
- N-methylpyrrolidone can also be preferably used as a water-soluble polar solvent.
- the flow characteristics at 20 ° C. and the dynamic viscoelastic properties of the ink composition are controlled by adjusting the amount of the water-soluble polar solvent and the surfactant and the amount of each of the surfactants. It can be easily adjusted to satisfy the above-mentioned flow characteristics in the third ink set and the above-mentioned dynamic viscoelasticity characteristics in the fourth ink set.
- the aggregation and the viscosity of the pigment of the ink composition during storage for a long period of time are small, and good storage stability can be realized. Furthermore, even if left in an open state (at room temperature and in contact with air), fluidity and redispersibility can be maintained for a long time.
- the ink composition does not cause clogging of nozzles or flight bending at the time of restart during printing or after interruption of printing in the ink jet recording method, and achieves good ejection stability.
- the ink composition preferably contains polymer fine particles.
- polymer fine particles refers to fine particles of a polymer component, and preferably refers to those composed of a polymer having a film forming ability.
- the “water-based emulsion” described below refers to an aqueous dispersion in which the continuous phase is water and the dispersed particles are polymer-fine particles. This "water-based emulsion" is sometimes called a polymer emulsion or a resin emulsion.
- the polymer component constituting the polymer fine particles include acrylic resin, vinyl acetate resin, styrene-butadiene resin, vinyl chloride resin, acryl-styrene resin, bushene resin, and styrene resin.
- these polymers are not limited by the mode of copolymerization, and may be present in the form of, for example, a copolymer or a random copolymer.
- the polymer particles Is preferably a polymer containing a polymer mainly composed of an acrylate ester and / or a methacrylate ester.
- Preferred polymer particles in the present invention are those having a film-forming property among the above-mentioned polymers.
- film forming property means that when a polymer fine particle is dispersed in water to form an aqueous emulsion, a polymer film is formed as the water component of the aqueous emulsion is evaporated. means.
- the ink composition to which the polymer fine particles are added has a property that a polymer film is similarly formed as the solvent component is evaporated. This polymer film plays a role in firmly fixing the colorant component in the ink composition to the recording medium surface. It is considered that this makes it possible to realize an image having excellent scratch resistance and water resistance.
- the polymer fine particles preferably have a minimum film formation temperature of room temperature or lower, more preferably 30 ° C. or lower, and most preferably 10 ° C. or lower.
- a minimum film formation temperature of room temperature or lower, more preferably 30 ° C. or lower, and most preferably 10 ° C. or lower.
- the minimum film formation temperature is defined as a polymer film obtained by dispersing polymer fine particles in water, thinly casting it on a metal plate such as aluminum, and increasing the temperature to form a transparent continuous film. Means the lowest temperature at which In the temperature range below the minimum film formation temperature, it becomes a white powder.
- the glass transition point of the polymer fine particles is preferably 30 ° C. or lower.
- the polymer fine particles have a structure derived from an unsaturated vinyl monomer having a hydroxyl group and a crosslinkable monomer having two or more polymerizable double bonds. Those having a structure crosslinked by a monomer are preferred. Such polymer fine particles form a ⁇ -dimensional crosslinked structure by copolymerizing, at the time of polymerization, a crosslinkable monomer having two or more, more preferably three or more polymerizable double bonds.
- the polymer fine particles in the present invention those having a single particle structure can be used.
- the “core-shell structure” means “a form in which two or more kinds of polymers having different compositions exist in a phase separated state in a particle”. Therefore, not only a form in which the shell part completely covers the core part, but also a part in which the core part is partially covered may be used. Further, a part of the shell polymer may form a domain or the like in the core particle. Further, a layer having a multilayer structure of three or more layers including layers having different compositions may be provided between the core and the seal.
- the polymer fine particles having a core-shell structure are deformed by the pressure caused by the film formation due to the coalescence of the polymer fine particles due to the decrease in water and the water-soluble organic solvent.
- Polymer fine particles can be obtained by known emulsion polymerization. That is, it can be obtained by emulsion polymerization of an unsaturated vinyl monomer (unsaturated vinyl monomer) in water in the presence of a polymerization catalyst and an emulsifier.
- unsaturated vinyl monomers include acrylate monomers, methacrylate monomers, aromatic vinyl monomers, vinyl ester monomers, and acrylate monomers generally used in emulsion polymerization.
- methyl acrylate ethyl acrylate, isopropyl acrylate, n-butyl acrylate, isobutyl acrylate, n-amyl acrylate, isoamyl acrylate, and n-hexyl acrylate.
- Methacrylic acid esters vinyl esters such as vinyl acetate; vinyl cyanide compounds such as acrylonitrile and methacrylonitrile; halogenated monomers such as vinylidene chloride and vinyl chloride; styrene, 2-methylstyrene, and vinyltoluene Aromatic vinyl monomers such as t-butylstyrene, chlorostyrene, vinylanisole and vinylnaphthalene; Olefins such as ethylene, propylene and isopropylene; Dienes, Jen such as black hole Puren; Binirue one ether, vinyl ketones, vinyl monomers such as Binirupirori Don.
- an unsaturated vinyl monomer having a carboxyl group is indispensable for a monomer having no carboxyl group, but preferred specific examples thereof include acrylic acid, methacrylic acid, itaconic acid, fumaric acid, and maleic acid. Acids are preferred, and the use of methacrylic acid is preferred.
- usable emulsifiers include anionic surfactants, nonionic surfactants, and mixtures thereof.
- acrylamides or hydroxyl group-containing monomers are added.
- the printing stability can be further improved.
- acrylamides include acrylamide and N, N, -dimethylacrylamide.
- hydroxyl group-containing monomer include 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 2-hydroxyethyl methacrylate, and 2-hydroxypropyl methacrylate. They can be used alone or in combination of two or more.
- the polymer fine particles having a core-shell structure are produced by a known method, generally by multi-stage emulsion polymerization or the like. For example, it can be produced by the method disclosed in Japanese Patent Application Laid-Open No. Hei 4-76004. Specific examples of the unsaturated vinyl monomer used for the polymerization include those described above.
- polymer fine particles those derived from a sulfonate group and / or a salt thereof in the polymer structure are preferably used.
- Such polymer fine particles have a structure derived from a sulfonic acid group and / or a salt thereof, and a structure crosslinked by a crosslinkable monomer (monomer) having two or more polymerizable double bonds.
- the structure derived from a sulfonic acid group and / or a salt thereof can be introduced by using a monomer having a sulfonic acid group as a copolymerization component.
- the monomer having a sulfonic acid group examples include vinylsulfonic acid and its salts, styrenesulfonic acid and its salts, 2- (meth) acryloylamino-1-methylpropanesulfonic acid and its salts, and the like.
- an initiator, a surfactant, a molecular weight modifier, a neutralizer and the like used in the emulsion polymerization may be used in accordance with a conventional method.
- the polymer fine particles may be mixed as fine particle powder with other components of the ink composition.
- the polymer fine particles are dispersed in an aqueous medium to form a polymer emulsion, and then the ink is added.
- it is mixed with the other components of the composition.
- the content of the polymer fine particles in the ink composition is preferably about 0.1 to 10% by weight, more preferably about 0.1 to 5% by weight.
- the molecular weight of the polymer fine particles is 100,000 or more, preferably 100,000 or more.
- the particle diameter of the polymer fine particles is preferably about 10 to 400 nm, more preferably about 50 to 200 nm.
- the polymer particles preferably have a hydrophilic group on the surface.
- the hydrophilic group is preferably a sulfonic acid group and a salt thereof.
- the polymer fine particles fine particles having a film forming property and having a hydrophilic group (particularly a sulfonic acid group and a salt thereof) on the surface and having a particle diameter of 50 to 200 nm are preferable.
- the preferred composition when the ink composition further contains polymer fine particles is as follows.
- Pigment or dye insoluble or hardly soluble in water 1 to 10% by weight Wetting agent 0.01 to 20% by weight Polar solvent 0.01 to 20% by weight Surfactant 0.01 to 10% by weight Polymer-fine particles 0.1 to 10% by weight Ion-exchanged water
- a more preferred composition is as follows.
- Pigment or dye insoluble or hardly soluble in water 1 to 10% by weight Wetting agent 5 to 20% by weight Polar solvent 1 to 10% by weight Surfactant 0.1 to 5% by weight Polymer fine particles 0.1 to 5 % By weight ion-exchanged water
- a preferred composition when a self-dispersion pigment whose surface is hydrophilized is used is as follows.
- Pigment or water-insoluble or slightly soluble dye 1 to 5% by weight
- the preferred composition when using the microencapsulated pigment is as follows.
- Microencapsulated pigment 3 to 10% by weight
- a preferred composition of the above-mentioned ink composition when using a microencapsulated pigment is as follows.
- Ion-exchanged water Wetting agent, penetrant, polar solvent, and interface used in the preferred composition Preferred examples of the activator are the same as those in the preferred composition when the self-dispersion pigment whose surface is subjected to hydrophilic treatment is used.
- the flow properties at 20 ° C. and the dynamic viscoelastic properties of the ink composition according to the present invention are controlled by adjusting the amount of the surfactant and / or polar solvent to be added. It can be easily adjusted so as to satisfy the above-mentioned flow characteristics in the third ink set and the above-mentioned dynamic viscosity characteristics in the fourth ink set.
- microencapsulated pigments generally have better dispersion stability than a method of dispersing a pigment using a dispersant, so that it is easy to increase the amount of the pigment to be added. Since there is almost no effect on the fluidity, the flow characteristics at 20 ° C.
- the dynamic viscoelastic characteristics of the ink composition according to the present invention are determined by the flow characteristics and dynamic viscoelastic characteristics described above in the first to third ink sets.
- the dynamic viscoelasticity characteristics described above in the fourth ink set can be adjusted very easily.
- the ink compositions included in the ink jet recording ink set according to the present invention have been described.
- the flow properties and the dynamic viscoelastic properties at 20 ° C. of the respective ink compositions are the first to third.
- the type and amount of the additive described above are determined so as to satisfy the flow characteristics described above in the ink set and the dynamic viscoelastic characteristics described above in the fourth ink set. Thereby, it is possible to achieve the ejection stability of each ink and the variation in the ejection amount of the ink between the colors with high accuracy.
- the ink jet recording ink set of the present invention is produced by combining at least two colors of an ink composition having a flow property at 20 ° C. and a dynamic viscoelastic property within the above range, and is preferably an ink jet. This is a form of ink power that can be applied to the top printing area.
- the ink set of the present invention As described above, excellent flight stability of ink at the time of ink ejection, excellent ejection of a stable ejection amount, and formation of a stable image can be achieved. A recording method can be provided. Further, by using the ink set of the present invention, it is possible to provide an excellent recorded matter in which the obtained image is stable. ⁇ Brief description of drawings>
- FIG. 1 is a schematic diagram illustrating a flow characteristic curve at 20 of a pigment ink, for explaining a second ink set of the present invention
- FIG. 2 is a schematic diagram illustrating a flow characteristic curve of a pigment ink at 20 ° C. for explaining a third ink set of the present invention
- FIG. 3 is a schematic diagram illustrating a flow characteristic curve at 20 ° C. of a pigment ink for explaining a fourth ink set of the present invention
- FIG. 4 is a schematic view of a capillary type viscoelasticity measuring device for explaining a fourth ink set of the present invention
- FIG. 5 is a diagram showing a dashed line pattern for measuring the ejection stability of the ink composition.
- 1 is a measuring device
- 2 is a test liquid
- 3 is a test liquid reservoir
- 4 is a constant temperature device
- 5 is a precision measuring tube
- 6 is a thin film
- 7 is a sensor means.
- the black microphone mouth encapsulated pigment “MCP 1” was prepared in the same manner as in Example 1 described in JP-A-10-316909. That is, 5 g of car pump rack and 3 g of Adecaria Soap SE-1ON (made by Asahi Denka Kogyo), which is a polymerizable surfactant, were placed in a reaction vessel equipped with an ultrasonic generator, a stirrer, and a temperature controller. was added to 60 g of ion-exchanged water, and ultrasonic waves were irradiated for 4 hours to perform a pulverization treatment.
- Adecaria Soap SE-1ON made by Asahi Denka Kogyo
- microencapsulated pigment obtained is in the form of a dispersion.
- a monomer mixture of 15 g of benzyl methacrylate, 15 g of butyl methacrylate and 10 g of methacrylic acid and 1 g of potassium persulfate were further added in advance, and polymerized at 60 ° C for 48 hours.
- the reaction was performed.
- the obtained target product was adjusted to pH 8 with potassium hydroxide, and filtered with a 0.4 im filter to remove coarse particles.
- MCP 2 a microencapsulated pigment, was obtained.
- the average particle size of the microencapsulated pigment was 130 nm.
- the microencapsulated pigment obtained is in the form of a dispersion.
- C.I.Pigmentable 15 3 in 100 g of ion-exchanged water, with 100 g of polymerizable surfactant Adekyori Soap SE-10N (manufactured by Asahi Denka Kogyo Co., Ltd.)
- Adekyori Soap SE-10N manufactured by Asahi Denka Kogyo Co., Ltd.
- dispersion treatment was further performed for about 2 hours with a sand mill. This dispersion was charged into a reaction vessel equipped with an ultrasonic generator, a stirrer, a temperature controller, a reflux condenser, and a dropping funnel.
- a monomer mixture obtained by mixing 20 g of acrylonitrile and 20 g of dibutyl fumarate and 1 g of potassium persulfate were further added, and a polymerization reaction was carried out at 60 ° C. for 48 hours.
- the obtained target product was adjusted to pH 8 with potassium hydroxide, and filtered through a 0.4 m filter to remove coarse particles.
- "MCP 4" a microencapsulated pigment, was obtained.
- the average particle size of the microencapsulated pigment was 130 nm.
- the resulting microencapsulated pigment is in the form of a dispersion.
- MCP5 which is a microencapsulated pigment was obtained.
- the average particle size of the microencapsulated pigment was 130 nm.
- the microencapsulated pigment obtained is in the form of a dispersion.
- the obtained colorant dispersion is adjusted to about pH 8 with potassium hydroxide and filtered through a 0.4 m filter to remove coarse particles.
- MCP 7 a microencapsulated pigment
- the average particle size of the microphone-encapsulated pigment was 130 nm.
- the microencapsulated pigment obtained is in the form of a dispersion.
- the average particle size of the capsule is 150 nm.
- Pigmentable I: 15: 3 was used, and a cyan microphone-encapsulated pigment "MCP10" was obtained in the same manner as in “MCP9” except that Pigmentable I: 15: 3 was used.
- the force capsule has an average particle size of 150 nm.
- Yellow microencapsulated pigment "MCP11” was obtained in the same manner as “MCP9” except that CI Yellow Pigment 138 was used.
- the average particle size of the capsule is 15 O nm.
- MCP 9 In the same way as “MCP 9", except that C.I. A yellow microphone-encapsulated pigment “MCP 1 2" was obtained.
- the force capsule has an average particle size of 150 nm. Table A below summarizes the microphone-encapsulated pigments used in the examples described above.
- C.I. pigment red 5% by weight of C.I. pigment red, 1% by weight of an ammonium salt of a styrene-acrylic acid copolymer (molecular weight: 700, 38% by polymer), and 15% by weight of ion-exchanged water And were mixed in a sand mill and dispersed for 2 hours.
- the ink solvent was prepared by adding the weight% and ion-exchanged water to the remaining amount.
- the other ink compositions in the ink set of Example 1, the ink compositions in the ink set of Comparative Example 1, and the magenta ink in the ink sets of Example 11 and Comparative Example 2 also have the compositions shown in Tables 1 and 5. And manufactured in a similar manner.
- Ammonium salt Ammonium salt of styrene- ⁇ lylic acid copolymer (Molecular weight 7000, Lima-38%) o
- TEG-m-DE Tori-I-Tylenek * Ricoh-Mol * Thiftether
- 1,2-HD 1,2-hexanesyl
- KOH iiium hydroxide
- M man ink
- c cyan ink
- y mouth-ink
- StyAcr copoly Styrene acrylic acid copolymer (Molecular weight 11000, acid value 150), Gly: Kulycerin, EG: Ichirenku 'alcohol
- TEG-m-BE Triethylene glycol * Ricol-mono-phenyl ether, 1,2-HD: 1,2xane * ol, 2-Pyr: 2-Hy. D Riddon, TEA: Trietano-Lamine
- Ratio B 4.70 -0.1420 0.45 0.45 0.90 100
- the ink sets prepared in Examples 1 to 11 and Comparative Examples 1 and 2 were filled into an ink cartridge, and loaded into an ink jet printer PM700C (manufactured by Seiko Epson Corporation). Print 1 mm line (see Fig. 5) on fine paper (manufactured by Seiko Epson Corporation) alternately in each color (black, yellow, cyan, and magenta), and print out 400 sheets. Printed one by one.
- the flow characteristics and dynamic viscoelasticity of the ink composition at 20 ° C. are the same as those of the ink compositions constituting the ink sets in the first to fourth ink sets.
- each ink can be discharged stably (the property that ink is stably discharged in a fixed direction from the head of the ink jet printer). ) was obtained, and a high-quality image could be obtained when used as an ink set.
- the ink set of Examples 1 to 11 in which the flow characteristics and the dynamic viscoelastic characteristics of the ink composition satisfy the above formulas (1), (IV), and (VII) are used, high ejection stability is obtained.
- the ink cartridges of Examples 1 to 11 and Comparative Examples 1 to 2 were filled into an ink cartridge, and the ink cartridge was mounted on an ink jet printer PM700C (manufactured by Seiko Epson Corporation).
- PM700C manufactured by Seiko Epson Corporation
- ISO / JIS—SCID high-definition digital standard image data
- image name portrait example number 1, image identification symbol N1
- PM photo paper Seiko Epson Corporation, trade name
- the recorded matter obtained by using the ink sets of Example 1 to Example 11 showed no variation in the ink discharge amount between the respective colors up to the 200th sheet, good flight stability, Better image quality was obtained. Furthermore, the recorded matter obtained by using the ink sets of Examples 3 to 10 showed no variation in the ejection amount of ink between the colors even after passing through 400 sheets, and the flight stability was extremely high. Good and extremely high quality images were obtained. However, in the printed matter obtained using the ink sets of Comparative Example 1 and Comparative Example 2, the ejection amount of each ink varied, and high image quality could not be obtained.
- the sedimentation of the pigment in each of the ink sets in each of the examples was measured at room temperature by means of a Yu-Viscan MA1000, which measures the intensity distribution of backscattered light and transmitted light in the height direction of the sample.
- Yu-Viscan MA1000 measures the intensity distribution of backscattered light and transmitted light in the height direction of the sample.
- the ink sets of Examples 2 to 10 almost no sedimentation phenomenon was observed even after two weeks from the preparation of the ink, whereas in the ink set of Comparative Example 1, the ink set Black ink and yellow ink showed a tendency to settle.
- the ink set of the present invention exhibits good ejection stability, achieves high-precision suppression of variation in the ink ejection amount between each color, and can provide high-quality images. Further, according to the ink set manufacturing method of the present invention, an ink set that exhibits good ejection stability, achieves high-precision suppression of variations in the ink ejection amount between each color, and can obtain high-quality images. Can be easily manufactured.
- the image recording method of the present invention it is possible to provide an image recording method capable of obtaining a high-quality image. Further, according to the recorded matter of the present invention, a recorded matter of high image quality can be provided.
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00981725A EP1153991A4 (en) | 1999-12-16 | 2000-12-14 | INK SET FOR INK JET PRINTING, METHOD FOR PRODUCING THE SAME, IMAGE PRINTING METHOD, AND PRINTING |
US09/913,146 US6602333B2 (en) | 1999-12-16 | 2000-12-14 | Ink set for ink-jet recording, process for producing same, method of image recording, and print |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11/356884 | 1999-12-16 | ||
JP35688499 | 1999-12-16 | ||
JP2000-221565 | 2000-07-21 | ||
JP2000221565 | 2000-07-21 | ||
JP2000301081 | 2000-09-29 | ||
JP2000-301081 | 2000-09-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2001044384A1 true WO2001044384A1 (fr) | 2001-06-21 |
Family
ID=27341549
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2000/008867 WO2001044384A1 (fr) | 1999-12-16 | 2000-12-14 | Ensemble d'encres pour impression a jet d'encre, son procede de production, procede d'impression d'image et impression |
Country Status (3)
Country | Link |
---|---|
US (1) | US6602333B2 (ja) |
EP (1) | EP1153991A4 (ja) |
WO (1) | WO2001044384A1 (ja) |
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JP2001329199A (ja) * | 2000-05-23 | 2001-11-27 | Kao Corp | 水性インク組成物 |
WO2003011987A1 (de) * | 2001-07-17 | 2003-02-13 | Basf Aktiengesellschaft | Farbmittelzubereitungen |
US7566361B2 (en) | 2001-07-17 | 2009-07-28 | Basf Aktiengesellschaft | Colouring preparations |
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JP2003192968A (ja) * | 2001-10-19 | 2003-07-09 | Hewlett Packard Co <Hp> | 減速が改善されたインク組成物 |
JP2003128968A (ja) * | 2001-10-25 | 2003-05-08 | Konica Corp | インクジェット用インクとそれを用いたインクジェットカートリッジ、インクジェット画像記録方法及びインクジェット記録画像 |
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Also Published As
Publication number | Publication date |
---|---|
US6602333B2 (en) | 2003-08-05 |
EP1153991A4 (en) | 2009-04-22 |
US20030029355A1 (en) | 2003-02-13 |
EP1153991A1 (en) | 2001-11-14 |
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