CN1727415A - Inkjet recording ink, and cartridge and recording device having said ink - Google Patents
Inkjet recording ink, and cartridge and recording device having said ink Download PDFInfo
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- CN1727415A CN1727415A CN 200510084165 CN200510084165A CN1727415A CN 1727415 A CN1727415 A CN 1727415A CN 200510084165 CN200510084165 CN 200510084165 CN 200510084165 A CN200510084165 A CN 200510084165A CN 1727415 A CN1727415 A CN 1727415A
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Abstract
The present invention provides an ink for inkjet recording containing a coloring material, a humectant, a penetrant, water and a water-soluble substance which undergo polycondensation in a state wherein the water is freed (for example, a hydrolyzable organic silicon compound, wherein the ink further contains a gelation suppressing agent which prevents the water-soluble substance from gelling in water, or has a pH of 8 to 12.
Description
Technical field
The box and the recording unit that the present invention relates to be fit to the ink for inkjet recording of ink-vapor recording and possess this ink.
Background technology
At present, as the ink that in ink-vapor recording, uses, contain colorant, wetting Agent for Printing Inks, penetrant and water such as dyestuff or pigment as everyone knows., if when using the ink contain above-mentioned colorant to form image on recording mediums such as recording paper, the water tolerance of this image just is a problem.Especially use the ink contain dyestuff at common paper (the i.e. paper of on market, generally selling, especially the paper that in the duplicating machine of electrofax mode, uses, be not according to waiting the paper made from having optimal structure, composition and characteristic as ink-vapor recording) during enterprising line item, the water tolerance non-constant that becomes.
Therefore, at present, for example the spy open flat 10-212439 communique, spy open in flat 11-293167 communique and the flat 11-315231 communique of Te Kai disclosed like that, proposed to improve the water tolerance of the image on the recording medium by containing water-disintegrable silane compound (silicoorganic compound).Promptly, ink droplet is attached on the recording medium, water equal solvent in this ink droplet or evaporation or when soaking into to recording medium, above-mentioned silanization thing generation polycondensation, the silane compound that this polycondensation takes place surrounds colorant, even therefore the image on the recording medium is soaked in water, can prevents that also colorant is dissolved in this water, thereby improve the water tolerance of its image.
But,, have the such problem of prolonged preservation deterioration at the ink that contains water-disintegrable silane compound as described above.That is, contain the ink of silane compound, normally neutral (the pH value is about 7), therefore, if the long-term continuously carbon dioxide in air that absorbs, ink just becomes acidity, like this, ink one becomes acidity, and polycondensation slowly takes place in water above-mentioned silane compound, and gelation can take place.Especially under the hot environment about 70 ℃, preserve, promote the gelation of silane compound in water more.When the ink that uses silane compound that gelation takes place like this writes down, because the rising of ink viscosity, and it is bad that the ink droplet ejection takes place, image quality reduces, and taken place at silane compound under the state of gelation to a certain degree, ink droplet attached to recording medium on and water or evaporation in this ink droplet or when being impregnated in the recording medium, can not surround colorant fully by polycondensation, the water tolerance of the image on the recording medium also reduces.
The present invention finishes in view of such problem, its purpose is, even after will containing the ink of the such water-soluble substances that polycondensation takes place of said hydrolyzed silane compound carry out prolonged preservation under anhydrous state, when re-using it and writing down, when suppressing the image quality reduction, can keep the water tolerance of image high-levelly.
Summary of the invention
To achieve the above object, in the present invention, in ink, contain and suppress the gelation inhibitor that gelation takes place water-soluble substances in water, or the pH value of ink is set in 8～12.
Specifically, the 1st invention is an object with the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-soluble substances of polycondensation takes place under the state of no above-mentioned water, contains the gelation inhibitor that gelation takes place in water the above-mentioned water-soluble substances of inhibition.
Thus, though ink in prolonged preservation owing to absorbing carbon dioxide becomes acidity because the gelation inhibitor suppresses the gelation of water-soluble substances in water, the polycondensation of water-soluble substances is suppressed, thereby suppresses the rising of ink viscosity.Therefore, even when after prolonged preservation, re-using this ink and writing down, the ejection that ink droplet does not take place yet is bad, and ink droplet attached to recording medium in this ink droplet water or evaporation or when being impregnated in the recording medium, water-soluble substances surrounds colorant by polycondensation.Therefore, even when after prolonged preservation, re-using this ink and writing down, when can suppressing image quality and reducing, can keep the water tolerance of image high-levelly.
The 2nd invention, in above-mentioned the 1st invention, water-soluble substances is water-disintegrable silane compound.
That is, silane compound can be brought into play the action effect of the 1st invention effectively being extraordinary aspect the raising water tolerance.
The 3rd invention, in above-mentioned the 2nd invention, the gelation inhibitor is the methyl ethyl diketone or derivatives thereof.
Because like this, the oxygen of methyl ethyl diketone or derivatives thereof and the active part of silane compound produce hydrogen bond, therefore can suppress the gelation of silane compound reliably.On the other hand, ink droplet attached to recording medium on, water or evaporation in this ink droplet or when being impregnated in the recording medium, above-mentioned hydrogen bond disconnects, methyl ethyl diketone or derivatives thereof or evaporation or be impregnated in the recording medium, polycondensation takes place in silane compound reliably.Therefore, can be regarded as only as the gelation inhibitor.
The 4th invention, in above-mentioned the 3rd invention, the methyl ethyl diketone derivative is methyl ethyl diketone coordination compound or the methyl ethyl diketone derivative with plane of symmetry.
Thus, obtain and the easy bonded derivative of the active part of silane compound.Especially have the methyl ethyl diketone derivative of the plane of symmetry, the active part of silane compound is arranged in row usually, therefore is easy to combine with this active part.
The 5th invention, in above-mentioned the 2nd invention, the content of gelation inhibitor with respect to water-disintegrable silane compound, by quality percentage, is set at 0.1～30%.
Promptly, the gelation inhibitor is with respect to the content of silane compound, if be less than 0.1%, just can not suppress the gelation of silane compound fully, on the other hand, if more than 30%, ink droplet attached to recording medium on, water or evaporation in this ink droplet or when being impregnated in the recording medium, the polycondensation of silane compound is hindered by the gelation inhibitor easily, thereby is set in 0.1～30%.Therefore, according to the present invention, after long-term, also can keep high water tolerance.
The 6th invention is an object with the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-soluble substances of polycondensation takes place under the state that does not have this water, and the pH value is set in 8～12.
Promptly, if the pH value of ink is less than 8, owing to ink absorbing carbon dioxide in prolonged preservation becomes acidity, therefore, gelation takes place in water-soluble substances easily in water, on the other hand, if greater than 12, or make in recording unit to constitute ink is ejected into ink-jet first grade resin, metallic material corrosion on the recording medium, or make it deterioration, therefore be set in 8～12.Therefore, be set in 8～12,,, can suppress the gelation of ink Yi Bian can prevent that ink becomes acidity after prolonged preservation on one side just can suppress to constitute ink-jet first grade resin, Corrosion of Metallic Materials, deterioration by pH value with ink.Its result, even when re-using this ink writing down after prolonged preservation, it is bad that the ink droplet ejection does not take place yet, and, ink droplet attached to recording medium on, water or evaporation in this ink droplet or when being impregnated in the recording medium, water-soluble substances surrounds colorant by polycondensation.Therefore, same with the 1st invention, even when after prolonged preservation, re-using this ink and writing down, in the reduction that can suppress image quality, can keep the water tolerance of image high-levelly.
The 7th invention, in above-mentioned the 6th invention, water-soluble substances is water-disintegrable silane compound.Can bring into play the action effect of the 6th invention thus effectively.
The 8th invention, in above-mentioned the 6th invention, by containing mineral alkali or organic bases, the pH value is set at 8～12.
According to like this, can be easily the pH value of ink be set in 8～12, even absorbing carbon dioxide also can access the damping fluid that the pH value that do not make ink changes.
The 9th invention is the invention of box, this box possesses the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-soluble substances of polycondensation takes place under the state that does not have this water, in this invention, above-mentioned ink contains and suppress the gelation inhibitor that gelation takes place above-mentioned water-soluble substances in water.
According to this invention, can obtain and the identical action effect of the 1st invention.
The 10th invention is an object with the box of the ink for inkjet recording that possesses the water-soluble substances that contains colorant, wetting Agent for Printing Inks, penetrant, water and polycondensation takes place under the state that does not have this water, and the pH value of above-mentioned ink is set in 8～12.
According to like this, can obtain and the identical action effect of the 6th invention.
The 11st invention is to possess to contain colorant, wetting Agent for Printing Inks, penetrant, water and the ink for inkjet recording of the water-soluble substances of polycondensation takes place under the state that does not have this water, this ink is ejected into the invention of the recording unit of the enterprising line item of recording medium, in this invention, above-mentioned ink contains and suppress the gelation inhibitor that gelation takes place above-mentioned water-soluble substances in water.
According to this invention, can obtain and the identical action effect of the 1st invention.
The 12nd invention is an object with the recording unit that possesses the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-soluble substances of polycondensation takes place under the state that does not have this water, this ink is ejected into the enterprising line item of recording medium, and the pH value of above-mentioned ink is set at 8～12.
Thus, can obtain and the identical action effect of the 6th invention.
Description of drawings
Fig. 1 is the schematic perspective view of inkjet recording device that expression possesses the ink for inkjet recording of embodiment of the present invention.
Fig. 2 is the part upward view of the ink gun of above-mentioned inkjet recording device.
Fig. 3 is the sectional view of the III-III line of Fig. 2.
Fig. 4 is the sectional view of the IV-IV line of Fig. 2.
Embodiment
Fig. 1 schematically shows the inkjet recording device A of the ink for inkjet recording that possesses embodiment of the present invention, this recording unit A installs the print cartridge 35 with above-mentioned ink in the above, and as hereinafter described, possess this ink is ejected into as the ink gun 1 on the recording paper 41 of recording medium.This ink gun 1 is supported fixing by support 31, on this support 31, not shown carriage motor is set, above-mentioned ink gun 1 and support 31 are led by the support shaft 32 that extends along main scanning direction (directions X illustrated in figures 1 and 2), and carry out reciprocation action in the direction by this carriage motor.Constitute the relative moving mechanism that ink gun 1 and recording paper 41 are relatively moved along main scanning direction by this support 31, support shaft 32 and carriage motor.
Above-mentioned print cartridge 35 is to receive the container of above-mentioned ink in container contents, and its structure is can load and unload with respect to ink gun 1, when in container, not having ink, and the ink that can more renew.
Two conveying roller 42 clampings that above-mentioned recording paper 41 is driven by not shown conveying motor rotation, utilize this conveying motor and each conveying roller 42, at the downside of above-mentioned ink gun 1, along carrying with the vertical sub scanning direction of above-mentioned main scanning direction (Y direction illustrated in figures 1 and 2).Constitute the relative moving mechanism that ink gun 1 and recording paper 41 are relatively moved along sub scanning direction by this conveying motor and each conveying roller 42.
Above-mentioned ink gun 1 as Fig. 2～shown in Figure 4, possesses a body 2, and this body 2 is formed with a plurality of pressure chambers with the ejiction opening 3b that is used to supply with the supplying opening 3a of ink and is used to spray ink with recess 3.Each recess 3 of this body 2 extends ground opening along above-mentioned main scanning direction at this above the body 2, mutually along above-mentioned sub scanning direction, be close to equally spaced state and be arranged side by side to reserve.The total length of above-mentioned each recess 3 opening is set into about 1250 μ m, and wide setting is into about 130 μ m.Moreover the both ends of the opening of above-mentioned each recess 3 form and are close to semicircle.
Constitute the side wall portion of each recess 3 of above-mentioned body 2 with pressure chamber's member 6 of the thick photosensitive glass system of about 200 μ μ m, constitute the bottom wall portion of each recess 3 with being bonded and fixed at the following of this pressure chamber's member 6 and ink flow path member 7 that stacked 6 stainless steel sheets constitute.In this ink flow path member 7, form a plurality of apertures 8 is connected with the supplying opening 3a of above-mentioned each recess 3 respectively, is connected with this each aperture 8 and along a supply of above-mentioned sub scanning direction extension with ink flow path 11 and a plurality of ejections usefulness ink flow paths 12 of being connected with above-mentioned ejiction opening 3b respectively.
In ink flow path member 7, from thickness ratio it little above several second stainless steel sheet form above-mentioned each aperture 8, its aperture is set into about 38 μ m.In addition, above-mentioned supply is connected with above-mentioned print cartridge 35 with ink flow path 11, supplies with ink from this print cartridge 35 in the ink flow path 11 to supplying with to use.
Stainless steel nozzle plate 9 be bonded and fixed at above-mentioned ink flow path member 7 below, this nozzle plate 9 is formed with a plurality of nozzles 14 that are used for towards above-mentioned recording paper 41 ejection ink droplets.The following of this nozzle plate 9 coating with hydrophobic membrane 9a.Above-mentioned each nozzle 14 is connected with ink flow path 12 with above-mentioned ejection respectively, is communicated with the ejiction opening 3b of above-mentioned each recess 3 respectively with ink flow path 12 by this ejection, below ink gun 1, is arranged in row shape ground along above-mentioned sub scanning direction and is provided with.Moreover above-mentioned each nozzle 14 is made of to tapering that the spray nozzle front end side diminishes and the line part that is arranged on the spray nozzle front end side in this tapering nozzle diameter, and the nozzle diameter of this line part is set into about 20 μ m.
Upside at each recess 3 of above-mentioned body 2 is provided with piezoelectric-actuator 21 respectively.This each piezoelectric-actuator 21 has Cr system oscillating plate 22, and the state of oscillating plate 22 to be adhesively fixed above above-mentioned ink gun body 2 clogs each recess 3 of this body 2, constitutes pressure chamber 4 with this recess 3.This oscillating plate 22 is made of oscillating plate of common on whole piezoelectric-actuator 21, also plays the effect as the common common electrode on whole piezoelectric elements 23 described later.
In addition, above-mentioned each piezoelectric-actuator 21 has piezoelectric element 23 and Pt system individual electrode 24, the middle layer 25 of this piezoelectric element 23 by the Cu system be arranged at respectively with above-mentioned pressure chamber 4 opposite sides of above-mentioned oscillating plate 22 (above) in corresponding to the part of pressure chamber 4 (relative to part) with recess 3 openings, and by lead zirconate titanate (PZT) formation, this individual electrode 24 is separately positioned on above-mentioned oscillating plate 22 opposite sides (top) with above-mentioned each piezoelectric element 23, be used on each piezoelectric element 23, applying voltage (driving voltage) respectively with this oscillating plate 22.
Above-mentioned oscillating plate 22, each piezoelectric element 23, each individual electrode 24 and each middle layer 25, all form with film, the thickness setting of oscillating plate 22 is into about 6 μ m, the thickness setting of each piezoelectric element 23 is into about (for example about 3 μ m) below the 8 μ m, the thickness setting of each individual electrode 24 is into about 0.2 μ m, and the thickness setting in each middle layer 25 is into about 3 μ m.
Above-mentioned each piezoelectric-actuator 21, by its oscillating plate 22 or each middle layer 25 and each individual electrode 24, on each piezoelectric element 23, apply driving voltage, the part corresponding to the pressure chamber 4 of this oscillating plate 22 is deformed, therefore the ink in ejiction opening 3b or this pressure chamber 4 of nozzle 14 ejections.Promptly, if between oscillating plate 22 and individual electrode 24, apply the voltage of pulse type, then raise by this pulsed voltage, because voltage effect, piezoelectric element 23 is just shrinking with the vertical width of its thickness direction, and in contrast, oscillating plate 22, individual electrode 24 and middle layer 25 do not shrink, therefore owing to so-called bimetallic effect, the part corresponding to pressure chamber 4 of oscillating plate 22 forms convex to pressure chamber's 4 side bending deformations.Because this deflection deformation, pressure chamber 4 in, produce pressure, utilize this pressure, via ejiction opening 3b and ejection with ink flow path 12 from the interior ink in nozzle extrusion pressure chambers 4 14.Then, because the decline of above-mentioned pulsed voltage, piezoelectric element 23 extends, the part corresponding to pressure chamber 4 of oscillating plate 22 returns to original state, at this moment, ink in ink of extruding from said nozzle 14 and the ink flow path 12 disconnects, spray volume for example as the ink droplet of 3pl to recording paper 41 ejections, become round point shape attached on 41 of this recording papers.In addition, the recovering state that forms convex at above-mentioned oscillating plate 22 from bending deformation from above-mentioned print cartridge 35, by supplying with ink flow path 11 and supplying opening 3a, is filled in ink in the pressure chamber 4 during to original state.Moreover, as the pulsed voltage that is applied on each piezoelectric element 23, as mentioned above, can not be the pulsed voltage of push-pull type also, can be from the 1st loss of voltage to than behind the 2nd low voltage of the 1st voltage, be increased to the pulsed voltage of drawing the type of pushing away of above-mentioned the 1st voltage.
Make ink gun 1 and support 31 be close to certain speed on the main scanning direction when an end of recording paper 41 moves to the other end, every specified time (for example about 50 μ s: driving frequency 20kHz) apply driving voltage (still to above-mentioned each piezoelectric element 23, arrive the local time that on recording paper 41, the ink droplet bullet is fallen at ink gun 1, do not apply voltage), thus, ink droplet drops on the prescribed position of recording paper 41 with regard to bullet.So the record one of a sweep test finishes, and just utilizes and carries motor and each conveying roller 42, along sub scanning direction specified amount ground feeding recordable paper 41, ink gun 1 and support 31 are moved along main scanning direction,, carry out the record of a new sweep test Yi Bian spray ink droplet.By carrying out this action repeatedly, on whole recording paper 41, form desirable image.
Below, for the ink that in above-mentioned recording unit A, uses, in following embodiment 1 and embodiment 2, explain.
The ink of embodiment 1 contains colorant, be suppressed at exsiccant wetting Agent for Printing Inks in the nozzle 14 etc. of above-mentioned ink gun 1, improve this ink to the penetrant of the impregnability of recording paper 41, water, as at the water-disintegrable silane compound that does not have the water-soluble substances that polycondensation takes place under this water state with suppress the gelation inhibitor that gelation takes place this silane compound in water.
From the ink droplet of nozzle 14 ejection of above-mentioned ink gun 1 attached to recording paper 41 on, water in this ink droplet or evaporation or when being impregnated in the recording paper 41, above-mentioned silane compound generation polycondensation, this moment is owing to surround colorant, even the image on the recording paper 41 is soaked in water, can prevent that also colorant is dissolved in this water, play the water-proof effect that improves its image, be preferably organoalkoxysilane that contains the amino organic radical of band and the hydrolysis reactant that does not contain amino organoalkoxysilane, perhaps, make organic mono-epoxy compounds and contain amino water-disintegrable silane and react the water-disintegrable silane of the water-disintegrable silane that forms and nonnitrogenous atom by the resulting silicoorganic compound of hydrolysis.
Above-mentioned colorant is dyestuff or pigment preferably, dyestuff no matter be which type of can, but be preferably water miscible matching stain or substantive dyestuff.
On the other hand, pigment optimization is following pigment.Promptly, as mineral black, can enumerate with diazonium salt and black carbon surface is carried out the surface-treated mineral black or make polymkeric substance carry out graft polymerization and carry out the surface-treated mineral black, as coloured pigment, can enumerate the coloured pigment of handling pigment with tensio-active agents such as the formaldehyde condensation products of naphthalenesulfonate, lignin sulfonic acid, dioctylsulfosuccinat, polyoxyethylene alkylamine, fatty acid esters.As the object lesson of coloured pigment, in bluish-green (cyan) pigment, can enumerate pigment Blue 15: 3, pigment Blue 15: 4, aluminum phthalocyanine etc.In addition, in magenta pigment, can enumerate pigment red 122, pigment violet 19 etc.And, in yellow ultramarine, can enumerate Pigment Yellow 73 74, Pigment Yellow 73 109, Pigment Yellow 73 110, pigment Yellow 12 8 etc.
Above-mentioned wetting Agent for Printing Inks, preferably polyvalent alcohol or the 2-Pyrrolidone or the such water-soluble nitrogen heterogeneous ring compound of N-N-methyl-2-2-pyrrolidone N-of glycerine etc.
Above-mentioned penetrant, the monoalky lether of the polyvalent alcohol of Diethylene Glycol single-butyl ether etc. preferably, that its content is preferably is all with respect to ink, be 1～50% by quality percentage.This be because, if be less than 1%, just can not obtain the effect that ink soaks into recording paper 41 fully, on the other hand, if more than 50%, the solvability at water of colorant and silane compound then worsens.
Above-mentioned gelation inhibitor, be by above-mentioned silane compound in water at leisure polycondensation wait the gelation inhibitor that suppresses to take place gelation (polymerization materialization), methyl ethyl diketone (with reference to Chemical formula 1) or derivatives thereof preferably, this methyl ethyl diketone derivative be methyl ethyl diketone coordination compound or have the methyl ethyl diketone derivative of the plane of symmetry preferably.
As the object lesson of above-mentioned methyl ethyl diketone coordination compound, can enumerate Al (AcAc)
3, Cu (AcAc)
2, Zr (AcAc)
4Deng.
In addition, object lesson as methyl ethyl diketone derivative with plane of symmetry, can enumerate 3-methylpentane-2,4-diketone (with reference to Chemical formula 2), heptane-3,5-diketone (with reference to chemical formula 3), 4-methylheptane-3,5-diketone (with reference to chemical formula 4), dimethyl malonate (with reference to chemical formula 5), 2-Methylpropanedioic acid dimethyl ester (with reference to chemical formula 6), diethyl malonate (with reference to chemical formula 7), 2-methyl-malonic ester (with reference to chemical formula 8) etc.
Chemical formula 2
Chemical formula 5
Above-mentioned methyl ethyl diketone or derivatives thereof, the active part of its oxygen and silane compound forms hydrogen bond (the methyl ethyl diketone derivative that especially has the plane of symmetry, the active part of silane compound, usually be arranged in row, so and easy combination of this active part limited capacity), therefore suppress the gelation of silane compound.On the other hand, ink droplet attached to recording paper 41 on, water in this ink droplet or evaporation or when being impregnated in the recording paper 41, this hydrogen bond is cut off, methyl ethyl diketone or derivatives thereof or evaporation or be impregnated in the recording paper 41, silane compound surrounds colorant by polycondensation.
The content of above-mentioned gelation inhibitor with respect to above-mentioned silane compound, by quality percentage, is preferably set to 0.1～30%.This be because, if be less than 0.1%, just can not suppress the gelation of silane compound fully, on the other hand, if more than 30%, ink droplet attached to recording paper 41 on, water in this ink droplet or evaporation or when being impregnated in the recording paper 41, the polycondensation of silane compound is subjected to the gelation inhibitor easily and hinders.Moreover Yi Bian the more preferably scope of gelation inhibitor is from obtaining suppressing the gelation of silane compound more reliably, the viewpoint that does not hinder the effect of polycondensation on recording paper 41 is set out on one side, with respect to silane compound,, be 0.5～20% by quality percentage.
Therefore, in present embodiment 1, ink for inkjet recording contains colorant, wetting Agent for Printing Inks, penetrant, water, as at the water-disintegrable silane compound that does not have the water-soluble substances that polycondensation takes place under this water state with suppress the gelation inhibitor that the methyl ethyl diketone or derivatives thereof etc. of gelation takes place this silane compound in water, even therefore ink in prolonged preservation owing to absorbing carbon dioxide becomes acidity, utilize this gelation inhibitor also to suppress the gelation of silane compound, thus, ink viscosity can not rise, and stable chronically continuously.Its result, when no matter re-using it and utilizing recording unit A on recording paper 41, to form image after with this ink prolonged preservation, still the pressure chamber 4 of the body 2 in the ink gun 1 of recording unit A or supply with under the state that is filled with ink in the ink flow path 11 etc. when re-using after the long-term placement of this recording unit A, the ejection that ink droplet does not take place is bad, and, ink droplet attached to recording paper 41 on, water or evaporation in this ink droplet or when being impregnated in the recording paper 41, can carry out the polycondensation of silane compound fully, silane compound surrounds colorant reliably.Therefore, after long-term, also can suppress the reduction of image quality, and can keep the water tolerance of image high-levelly.
Moreover, in above-mentioned embodiment 1, as the water-soluble substances that polycondensation takes place under anhydrous state, contain water-disintegrable silane compound, but if from the ink droplet of nozzle 14 ejection of ink gun 1 attached on the recording paper 41, water in this ink droplet or evaporation or when being impregnated in the recording paper 41, carry out polycondensation and surround the water-soluble substances of colorant, which type of can, if have the water-soluble substances of such character, usually identical with silane compound, because gelation slowly takes place in water, therefore so the prolonged preservation deterioration can contain and can be suitable for the present invention and suppress the suitable gelation inhibitor that gelation takes place this water-soluble substances in water.
At this,, the embodiment of concrete enforcement is illustrated as the ink of above-mentioned embodiment 1.
At first, make the 28 kinds of ink for inkjet recording (embodiment 1～embodiment 28) that constitute by following forming (content of each composition is quality percentage, and in the content of gelation inhibitor, the value shown in parantheses is interior is the content with respect to silane compound).
In all the foregoing description 1～embodiment 28, contain glycerine as wetting Agent for Printing Inks, contain the Diethylene Glycol single-butyl ether as penetrant, contain silicoorganic compound as water-disintegrable silane compound.These silicoorganic compound make as follows: at the water of putting into the 180g of container (10mol), at room temperature drop by drop add the H of 100g (0.56mol)
2NCH
2CH
2CH
2Si (OCH
3)
3And the Si (OCH of 166g (1.1mol)
3)
4Mixture, after its full dose is dripped, under 60 ℃ of conditions, stir 1 hour (being called " silicoorganic compound (A) ").
In addition,, contain the material of above-mentioned Chemical formula 1～chemical formula 8, in embodiment 11～embodiment 20, contain methyl ethyl diketone as the gelation inhibitor, but its content difference.
As colorant, in embodiment 1～embodiment 23, contain dyestuff, embodiment 24～embodiment 28 contains pigment.In this embodiment 24～embodiment 28, contain Al (AcAc) as the gelation inhibitor
3
(embodiment 1)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 2)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Cu(AcAc)
2 …0.5％(10％)
Pure water ... 69.5%
(embodiment 3)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Zr(AcAc)
4 …0.5％(10％)
Pure water ... 69.5%
(embodiment 4)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
3-methylpentane-2, the 4-diketone ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 5)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Heptane-3, the 5-diketone ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 6)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
4-methylheptane-3, the 5-diketone ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 7)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Dimethyl malonate ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 8)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
2-Methylpropanedioic acid dimethyl ester ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 9)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Diethyl malonate ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 10)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
The 2-methyl-malonic ester ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 11)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.0025% (0.05%)
Pure water ... 69.9975%
(embodiment 12)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.005% (0.1%)
Pure water ... 69.995%
(embodiment 13)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.025% (0.5%)
Pure water ... 69.975%
(embodiment 14)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.1% (2%)
Pure water ... 69.9%
(embodiment 15)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.25% (5%)
Pure water ... 69.75%
(embodiment 16)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 0.5% (10%)
Pure water ... 69.5%
(embodiment 17)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 1% (20%)
Pure water ... 69%
(embodiment 18)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 1.5% (30%)
Pure water ... 68.5%
(embodiment 19)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 2% (40%)
Pure water ... 68%
(embodiment 20)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methyl ethyl diketone ... 5% (100%)
Pure water ... 65%
(embodiment 21)
C.I. acid yellow 23 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 22)
C.I. Xylene Red 52 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 23)
C.I. sun blue 86 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 24)
Carbon black
(trade(brand)name CAB-O-JETTM-200, キ ャ ボ Star ト society system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 25)
Carbon black
(trade(brand)name CAB-O-JETTM-300, キ ャ ボ Star ト society system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 26)
Yellow ultramarine
(trade(brand)name FUJI SP YELLOW4223, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 27)
Magenta pigment
(trade(brand)name FUJI SP MAGENTA 9338, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
(embodiment 28)
Bluish-green pigment
(trade(brand)name FUJI SP BLUE 6403, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Al(AcAc)
3 …0.5％(10％)
Pure water ... 69.5%
Then, for relatively, make the two kinds of inks (ink that does not contain the gelation inhibitor) (comparative example 1 and comparative example 2) that constitute by following forming (content of each composition is quality percentage).
Moreover, in these comparative examples 1 and comparative example 2, do not contain penetrant.In addition, in comparative example 1, use the silicoorganic compound (A) identical, but in comparative example 2, use the silicoorganic compound of making by following method (being called " silicoorganic compound (B) ") with the various embodiments described above.That is the H of the 100g in the reaction vessel of packing into (0.56mol),
2NCH
2CH
2CH
2Si (OCH
3)
3In, drop by drop add the 2 of 49g (0.66mol), after its full dose is dripped, under 80 ℃ of conditions, stirred 5 hours, just obtain water-disintegrable silane amino and that epoxy group(ing) reacts and forms.Then, in new reaction vessel, drop by drop add water, the said hydrolyzed silane of 50.6g (0.2mol) and the Si (OCH of 30.4g (0.2mol) that mixes 120g (6.67mol)
3)
4Mixture, after its full dose was dripped, what obtained in 1 hour by reaction under 60 ℃ of conditions was the silicoorganic compound (B) of comparative example 2.
(comparative example 1)
C.I. acid black 2 ... 5%
Glycerine ... 10%
Silicoorganic compound (A) ... 5%
Pure water ... 80%
(comparative example 2)
C.I. acid black 2 ... 5%
Glycerine ... 10%
Silicoorganic compound (B) ... 5%
Pure water ... 80%
Then, each ink of the foregoing description 1～28 and comparative example 1,2 is placed March under 70 ℃ environment, observe each ink state thereafter, measure the ink viscosity before and after placing simultaneously.
Its result, each ink of comparative example 1,2, ink viscosity rises, and also observing has precipitation a little, but each ink of embodiment, except that the content embodiment 11 seldom of gelation inhibitor, ink viscosity does not change, and all can't see cohesion, precipitation yet.In addition, even in the ink of embodiment 11, though viscosity rises, littler than each ink rising degree of comparative example 1,2, precipitation capacity is also few.Therefore as can be known, owing to contain the gelation inhibitor,, can make ink stable through the long gelation that also can suppress silane compound backwards.But, if the content of gelation inhibitor very few (situation of embodiment 11), just can not obtain its stabilising effect fully, therefore from the viewpoint of stability, the lower value of its content, silane compound relatively, by quality percentage, be preferably set to 0.1%,, can be set at 0.5% in order to obtain more reliable stabilising effect.
Then, use embodiment 1～28 after the above-mentioned placement and each ink of comparative example 1,2, by commercially available printing press (utilizing the printing press of piezoelectric-actuator (but the thickness of piezoelectric element than above-mentioned embodiment much bigger) the ejection ink of above-mentioned recording unit A) at common paper (trade(brand)name Xerox4024, ゼ ロ Star Network ス society system) goes up the formation image, with form this image be immersed in the pure water with paper after, place and make it drying at ambient temperature, observe image and whether spread and sink in.
Its result with the image of each ink-mist recording of comparative example 1,2, has partly seen in this edge of image and to have spread and sunk in, in contrast, with the image of each ink-mist recording of embodiment, except that image, all do not see and spreading and sinking in each ink-mist recording of embodiment 11,19,20.In addition, even in image with each ink-mist recording of embodiment 11,19,20, though see and spreading and sinking in, the degree that it is spread and sunk in, better than image with each ink-mist recording of comparative example 1,2.Therefore as can be known, if utilize the gelation inhibitor to suppress the gelation of silane compound in advance,, also can obtain enhanced water resistance even after prolonged preservation.But, if the content of gelation inhibitor very few (situation of embodiment 11), as mentioned above, just can not get fully stable effect, so water tolerance deterioration a little, on the other hand, if the content of gelation inhibitor is (situation of embodiment 19,20) too much, ink droplet attached to recording paper on, water or evaporation in this ink droplet or when being impregnated in the recording paper, the polycondensation of silane compound is hindered by the gelation inhibitor easily, exists water tolerance that the possibility of some deterioration takes place.Therefore, from as much as possible water tolerance being maintained high-caliber viewpoint, with respect to silane compound, by quality percentage, preferably the content with the gelation inhibitor is set in 0.1～30%, in order to obtain more reliable water tolerance, can be set in 0.5～20%.
Embodiment 2
The ink of present embodiment 2, identical with above-mentioned embodiment 1, comprise: colorant, be suppressed at exsiccant wetting Agent for Printing Inks in the nozzle 14 etc. of ink gun 1, improve this ink (solvent) under the state that does not have this water, but do not contain the gelation inhibitor to the penetrant of the impregnability of recording paper 41, water with as the water-disintegrable silane compound of the water-soluble substances of polycondensation takes place.That is, present embodiment 2 replaces containing the gelation inhibitor, is set in 8～12 by the pH value with ink, suppresses the gelation of ink.Moreover, the pH value of ink is set in 8～12 after, also can contain the gelation inhibitor.
Concrete above-mentioned colorant, wetting Agent for Printing Inks, penetrant and silane compound, be with above-mentioned embodiment 1 in enumerate identical.The content of penetrant is also identical with above-mentioned embodiment 1, and is all with respect to ink, by quality percentage, can be 1～50%.
As mentioned above, the pH value of ink is set in 8～12 reason and is, if the pH value of ink is less than 8, absorbing carbon dioxide and become acidity in prolonged preservation then, therefore, gelation takes place by polycondensation etc. in silane compound easily in water, meanwhile, when colorant is matching stain, colorant is separated out, on the other hand, if greater than 12, pressure chamber's member 6, ink flow path member 7, nozzle plate 9 etc. of the body 2 in the ink gun 1 of recording unit A are corroded, or deterioration takes place.
Wish that preferred above-mentioned ink is the pH value to be set in 8～12 ink by containing mineral alkali or organic bases.If like this, just can be easily the pH value of ink be set at 8～12.In addition, if the combination by alkali and alkali, modulation in advance has shock absorption (no matter add or remove to a certain degree acid or alkali, also can keep hydrogen ion concentration to be close to certain effect) damping fluid, even absorbing carbon dioxide, the pH value does not change yet, and is more gratifying therefore.As the combination of the alkali and the alkali that are used to modulate such damping fluid, can enumerate the combination (also adding boric acid) etc. of combination, sodium hydroxide and Repone K of combination, sodium hydroxide and the sodium bicarbonate of sodium hydroxide and SODIUM PHOSPHATE, MONOBASIC.
As the object lesson of above-mentioned mineral alkali, can enumerate ammonia, sodium hydroxide, yellow soda ash, sodium bicarbonate, tertiary sodium phosphate, Sodium phosphate dibasic, Tripotassium phosphate, dipotassium hydrogen phosphate etc., can contain separately, also can contain other inorganics.
As the object lesson of above-mentioned organic bases, can enumerate methylamine, ethamine, dimethylamine, diethylamine, tetramethyleneimine, Trimethylamine 99, triethylamine etc., can contain separately, also can contain multiple.
Therefore, in present embodiment 2, the pH value of ink for inkjet recording that will contain colorant, wetting Agent for Printing Inks, penetrant, water and the water-soluble substances of polycondensation takes place under the state that does not have this water is set in 8～12, therefore in corrosion that suppresses pressure chamber's member 6, ink flow path member 7, nozzle plate 9 etc. or deterioration, can prevent that ink from becoming acidity after prolonged preservation, can suppress the gelation of ink.Its result, no matter be when re-using and utilizing recording unit A on recording paper 41, to form image after with this ink prolonged preservation, no matter be with the pressure chamber 4 of the body 2 in the ink gun 1 of recording unit A or supply with when re-using after placing this recording unit A for a long time with the state of filling ink in the ink flow path 11 etc., the ejection that does not produce ink droplet is bad, and, ink droplet attached to recording paper 41 on, water or evaporation in this ink droplet or when being impregnated in the recording paper 41, the polycondensation of silane compound is carried out fully, and silane compound surrounds colorant reliably.Therefore, identical with embodiment 1, after long-term, can suppress the reduction of image quality, and can keep the water tolerance of image high-levelly.
Moreover, in above-mentioned embodiment 2, as the water-soluble substances that polycondensation takes place under anhydrous state, be not limited to water-disintegrable silane compound, if from the ink droplet of nozzle 14 ejection of ink gun 1 attached to water (solvent) on the recording paper 41, this ink droplet or evaporation or when being impregnated in the recording paper 41, polycondensation takes place and surround the water-soluble substances of colorant, which type of can.
At this,, the embodiment that implements particularly is described as the ink of above-mentioned embodiment 2.
At first, make the 16 kinds of ink for inkjet recording (embodiment 1～embodiment 16) that constitute by following forming (content of each composition is quality percentage).In this each embodiment, by containing mineral alkali or organic bases, the pH value of ink is adjusted to 8～12 (in embodiment 2～embodiment 4 and embodiment 12, the modulation damping fluid).
Moreover, in whole the foregoing description 1～embodiment 26, contain glycerine as wetting Agent for Printing Inks, contain the Diethylene Glycol single-butyl ether as penetrant, contain silicoorganic compound as water-disintegrable silane compound.These silicoorganic compound are silicoorganic compound (A).
In addition,, in embodiment 1～embodiment 11, contain dyestuff, in embodiment 12～embodiment 16, contain pigment as colorant.
(embodiment 1)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Pure water ... 69.9%
PH value=12
(embodiment 2)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.2%
Potassium primary phosphate ... 0.7%
Pure water ... 69.1%
PH value=8
(embodiment 3)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
(embodiment 4)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Sodium bicarbonate ... 0.2
Pure water ... 69.7%
PH value=10.9
(embodiment 5)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Methylamine ... 0.5%
Pure water ... 69.5%
PH value=9.8
(embodiment 6)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Dimethylamine ... 0.5%
Pure water ... 69.5%
PH value=9.7
(embodiment 7)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Tetramethyleneimine ... 0.5%
Pure water ... 69.5%
PH value=9.7
(embodiment 8)
C.I. acid black 2 ... 5%
Glycerine ... 10%
The Diethylene Glycol monobutyl ... 10%
Silicoorganic compound (A) ... 5%
Ammonia ... 0.5%
Pure water ... 69.5%
PH value=9.5
(embodiment 9)
C.I. acid yellow 23 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Ammonia ... 0.5%
Pure water ... 69.5%
PH value=9.9
(embodiment 10)
C.I. Xylene Red 52 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Ammonia ... 0.5%
Pure water ... 69.5%
PH value=9.8
(embodiment 11)
C.I. sun blue 86 ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Ammonia ... 0.5%
Pure water ... 69.5%
PH value=9.5
(embodiment 12)
Carbon black
(trade(brand)name CAB-O-JETTM-200, キ ャ ボ Star ト society system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
(embodiment 13)
Carbon black
(trade(brand)name CAB-O-JETTM-300, キ ャ ボ Star ト society system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
(embodiment 14)
Yellow ultramarine
(trade(brand)name FUJI SP YELLOW 4223, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
(embodiment 15)
Magenta pigment
(trade(brand)name FUJI SP YELLOW 9338, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
(embodiment 16)
Bluish-green pigment
(trade(brand)name FUJI SP BLUE 6403, pigment society of Fuji system) ... 5%
Glycerine ... 10%
The Diethylene Glycol single-butyl ether ... 10%
Silicoorganic compound (A) ... 5%
Sodium hydroxide ... 0.1%
Boric acid ... 0.6%
Repone K ... 0.7%
Pure water ... 68.6%
PH value=9.5
Then, for relatively, make the two kinds of inks (ink that does not contain mineral alkali or organic bases) (comparative example 1 and comparative example 2) that constitute by following forming (content of each composition is quality percentage).
In these comparative examples 1 and comparative example 2, do not contain penetrant.In addition, in comparative example 1, use silicoorganic compound (A), in comparative example 2, use silicoorganic compound (B).
(comparative example 1)
C.I. acid black 2 ... 5%
Glycerine ... 10%
Silicoorganic compound (A) ... 5%
Pure water ... 80%
PH value=7.2
(comparative example 2)
C.I. acid black 2 ... 5%
Glycerine ... 10%
Silicoorganic compound (B) ... 5%
Pure water ... 80%
PH value=7.1
Then, each ink of the foregoing description 1～16 and comparative example 1,2 is placed March under 70 ℃ environment, observe the state of ink after this, and measure the ink viscosity before and after placing.
Its result, each ink of comparative example 1,2, ink viscosity rise (beginning to rise after about January), also observe throw out a little, but each ink of embodiment, the viscosity of ink does not change, and all can't see cohesion, precipitation yet.Therefore as can be known,, after long-term, also can suppress the gelation of silane compound, ink is stablized by in advance the initial pH value of ink being set in 8～12.
Then, use embodiment 1～16 after the above-mentioned placement and each ink of comparative example 1,2, by commercially available printing press (utilizing the printing press of the piezoelectric-actuator identical (but the thickness of piezoelectric element than above-mentioned embodiment much bigger) ejection ink) with above-mentioned recording unit A at common paper (trade(brand)name Xerox4024, ゼ ロ Star Network ス society system) goes up the formation image, with form this image be immersed in the pure water with paper after, place at ambient temperature and carry out drying, observe image and whether spread and sink in.
Its result with the image of each ink-mist recording of comparative example 1,2, partly sees in this edge of image and to spread and sink in, and in contrast, does not all see with the image of each ink-mist recording of embodiment and to spread and sink in.Therefore as can be known, if the pH value of ink is set in 8～12, suppress the gelation of silane compound in advance, even after prolonged preservation, also can obtain enhanced water resistance.
Utilizability on the industry
The present invention is to have in the ink for inkjet recording that utilizes inkjet recording device to record With, even when re-using it after this ink long preservation and record, can suppress figure When looking like the reduction of quality, also can keep the resistance to water of image quality, from this high-levelly A bit, the utilizability on the industry is very high.
Claims (3)
1. ink for inkjet recording, the water-disintegrable silane compound that it contains colorant, wetting Agent for Printing Inks, penetrant, water and polycondensation takes place under the state that does not have this water is characterized in that:
By containing mineral alkali or organic bases, the pH value is set at 8～12.
2. box, it possesses the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-disintegrable silane compound of polycondensation takes place under the state that does not have this water, it is characterized in that:
By containing mineral alkali or organic bases, the pH value of described ink is set at 8～12.
3. recording unit, possesses the ink for inkjet recording that contains colorant, wetting Agent for Printing Inks, penetrant, water and the water-disintegrable silane compound of polycondensation takes place under the state that does not have this water, and this ink is ejected in carries out record on the recording medium, it is characterized in that:
By containing mineral alkali or organic bases, the pH value of described ink is set at 8～12.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001064473 | 2001-03-08 | ||
| JP2001064477 | 2001-03-08 | ||
| JP2001064473 | 2001-03-08 | ||
| JP2001291017 | 2001-09-25 | ||
| JP2001291002 | 2001-09-25 |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB028059581A Division CN1232596C (en) | 2001-03-08 | 2002-03-08 | Inkjet recording ink and cartridge and recording device having said ink |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1727415A true CN1727415A (en) | 2006-02-01 |
Family
ID=35926947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510084165 Pending CN1727415A (en) | 2001-03-08 | 2002-03-08 | Inkjet recording ink, and cartridge and recording device having said ink |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1727415A (en) |
-
2002
- 2002-03-08 CN CN 200510084165 patent/CN1727415A/en active Pending
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