CN101463206A - Ink composition for ink jet recording - Google Patents

Abstract

The present invention provides an ink composition with which images with high quality without white streaks or roughness can be provided even when the images are printed at a low resolution on coated printing paper such as art paper. The ink composition for ink jet recording at least includes a colorant, water, an alcohol solvent, and a surfactant, wherein the alcohol solvent contains a slightly water-soluble alkanediol, a water-soluble 1,2-alkanediol, and a dialkylene glycol.

Description

Ink composition for ink-jet recording

Technical field

The present invention relates at various recording mediums, especially also can not printed the ink composition for ink-jet recording of uneven high-quality record thing in the recording medium that water-absorbents such as synthetic paper, printed book paper, resin film are low.

Background technology

Ink jet recording method be make black liquid small droplets splash, attached to the printing process of printing on the recording mediums such as paper.Because of the innovation progress of in recent years ink-vapor recording technology, ink jet recording method only is used to the field of the high meticulous printing that just can realize by silver salt photo or offset printing at present.Thereupon, developed the high-luster recording medium, the so-called dedicated paper that are not worse than printing-out paper or art paper etc. that to begin to be used for silver salt photo or offset printing field and be used for ink-vapor recording, can realize having the recording black liquid of ink-jet media with the image of the equal reflecting feel of silver salt photo.Using under the situation of common paper even also developing, also can realize the black liquid of using with the ink-vapor recording of the equal image quality of silver salt photo.

In recent years, along with the definition technique of having popularized from digital data, particularly in print field, the demand of digital color glue sample (DTP) is more and more higher, also begins to be suitable in DTP ink-jet recording.Owing to require among the DTP color reproduction of print, stability to reproduce, so when making the glue sample with ink-jet recording, the dedicated paper that uses ink-vapor recording to use usually.

But, in the color correction purposes, the demand of than dedicated paper, more wishing printed book paper is carried out ink-vapor recording is arranged, to not use dedicated paper if also consider, and directly printed book paper is carried out sample that ink-vapor recording obtains as the correction of a final proof sample, then can significantly reduce and proofread and correct required cost.In addition, be widely used in print field, in polyvinyl resin or vibrin, mix mineral filler etc. and carry out the synthetic paper that membranization obtains and have excellent cyclicity, in recent years, as the material of environment gentleness is received publicity.

Printed book paper is to be provided with the coating paper that the overlay that is used to accept oiliness China ink liquid obtains on its surface, but has the insufficient feature of black liquid receptivity of overlay.Therefore, when using the pigment inks liquid of the water-based that is generally used for ink-vapor recording, the perviousness of black liquid in recording medium (printed book paper) is low, produces on image sometimes and leaks profit or aggegation inequality.

At the problems referred to above, for example the spy opens and discloses a kind of pigment class China ink liquid in 2005-No. 194500 communiques (patent documentation 1), described pigment class China ink liquid is by using polysiloxane compound as tensio-active agent, add 1, alkanediols such as 2-hexylene glycol are as solubility promoter, can improve and leak profit, and also excellent to the glossiness of dedicated paper.In addition, the spy opens and proposes in 2003-No. 213179 communiques (patent documentation 2) to suppress the perviousness of black liquid in recording medium by adding water-miscible organic solvents such as glycerol or 1,3-butyleneglycol, can obtain high quality images.

[patent documentation 1] spy opens communique 2005-No. 194500

[patent documentation 2] spy opens communique 2003-No. 213179

Summary of the invention

The inventor etc. are in patent application (Japanese patent application 2007-241158) before, by in black liquid, add tensio-active agent such as polysiloxane, as the 2 kinds of alkanediols and the alkane triol of alcoholic solvent, even under the situation of in the recording medium of the low absorbency of printed book paper and so on, printing, also can realize not having the high quality images of lineae ablicantes and harsh feeling with low exploring degree.

Specifically, the inventor etc. replace the alkane triol by using two alkylene glycol, drawn following understanding: printed book paper not only, even resin film and so on does not have the recording medium of absorbency fully, also can realize not having the high quality images of lineae ablicantes and harsh feeling.The present invention obtains in view of above-mentioned cognition.

Therefore, the object of the present invention is to provide with low exploring degree under the situation of printing on the recording medium of low absorbencys such as printed book paper or resin film, also can realize not having the ink composition of the high quality images of lineae ablicantes and harsh feeling.

And ink composition for ink-jet recording of the present invention is the ink composition for ink-jet recording that contains coloured material, water, alcoholic solvent and tensio-active agent at least, wherein,

Alcoholic solvent contains the alkanediol of slightly water-soluble, water miscible 1,2-alkanediol and two alkylene glycol.

According to the present invention, even in the high quality images that under the situation of printing on the recording medium of low absorbencys such as printed book paper or resin film, also can realize not having lineae ablicantes and harsh feeling with low exploring degree.

Embodiment

Ink composition for ink-jet recording of the present invention is the ink composition for ink-jet recording that contains coloured material, water, alcoholic solvent and tensio-active agent at least, wherein,

Alcoholic solvent contains the alkanediol of slightly water-soluble, water miscible 1,2-alkanediol and two alkylene glycol.Below, each composition is described.

＜definition 〉

In this specification sheets, alkanediol and two alkylene glycol can for straight or branched any.

In addition, so-called water-soluble, be illustrated in solubleness in the water (with respect to the amount of the solute of 100g water) for more than the 10.0g, so-called slightly water-soluble is illustrated in solubleness in the water (with respect to the amount of the solute of 100g water) less than 1.0g.

＜alcoholic solvent 〉

The alcoholic solvent that is used for ink composition for ink-jet recording of the present invention contains at least three kinds of organic solvents in the alkanediol of slightly water-soluble, water miscible 1,2-alkanediol and the two alkylene glycol.By containing above-mentioned three kinds of alcoholic solvents as essential composition, at printed book paper, especially black liquid receptivity is than higher art paper, POD purposes paper (for example Ricoh business coatgross of Ricoh Co., Ltd's system (リ コ-PVC ジ ネ ス コ-ト グ ロ ス) 100 etc.), Laser Printing dedicated paper (Seiko Epson Corp's system for example, LPCCTA4 etc.) can suppress black liquid aggegation in, even under the situation of printing with low exploring degree, also can realize not having the high quality images of lineae ablicantes and harsh feeling, moreover, even under the situation of printing on the resin film that does not have black liquid receptivity substantially and so on the recording medium, also can realize not having the high quality images of lineae ablicantes and harsh feeling.

Need to prove, in this specification sheets, so-called aggegation, the residual part that has the recording medium surface not to be covered by black liquid was not represented with the density unevenness of colour system in the part of (for example with 6 inches four directions with monochromatic (not being the number of colours of black liquid) when printing) generation when expression was printed with face.In addition, so-called lineae ablicantes, represent following phenomenon: (when for example printing with monochrome with 6 inches four directions) do not have partial depth of shade inequality with colour system when printing with face, the part that is not covered by black liquid with the residual surface that recording medium arranged of striated at the driving direction of record-header.In addition, so-called harsh feeling or inking are bad, represent following phenomenon: same as described above when printing with face, there be not partial depth of shade inequality and the part that is not covered of the residual surface that recording medium arranged with colour system by black liquid, the shaggy granular sense of recording medium is arranged.

As mentioned above, outside the alkanediol and water miscible 1,2-alkanediol that remove to add slightly water-soluble, also add two alkylene glycol, can realize not having high quality images agnogenio true of lineae ablicantes and harsh feeling, but think as follows as essential composition.

Think that the black liquid agglutinative reason that takes place when writing down is on printed book paper, the surface tension height of black liquid point (inkdot), the contact angle height of printed book paper surface and black liquid drop is so the printed book word bomb goes out black liquid.Even when low exploring degree record, take place under lineae ablicantes or the inking condition of poor, when reducing the surface tension attached to the black liquid on printed book paper surface, also can suppress black liquid aggegation.

In addition, think that the lineae ablicantes or the bad reason of inking of low exploring degree record is, contact attached to the black liquid point on printed book paper surface and the black liquid point of adjacency, wetting each other expansion, undried black liquid phase flows mutually.Think between the black liquid point of adjacency adhere to the time difference or when adhering to drop size etc. cause time of drying of black liquid point different and produce this mutual black liquid and flow.Therefore, think the high quality images that also realizes not having lineae ablicantes and harsh feeling for the aggegation that suppresses black liquid, under the situation of printing, preferably make the low and mobile low black liquid of surface tension attached on the printed book paper with low exploring degree.

But, think when not using the perviousness lubricant for the flowability that reduces black liquid, accelerate attached to the black liquid point on printed book paper surface is dry, and the absorption of black liquid is also accelerated, so lost the time of wetting expansion between the black liquid point that adheres to, the result lineae ablicantes takes place in low exploring degree record or inking bad.

Being used for two alkylene glycol of the present invention is materials that glycerol and so on shows toughness.In addition, two alkylene glycol are the low perviousness lubricants of display surface warp tension ratio glycerol.The surface tension of two alkylene glycol when for example, making 10% aqueous solution is 53mN/m.

In addition, as alcoholic solvent, combination water insoluble alkanediol, water-soluble 1, when 2-alkanediol and two alkylene glycol use, compare with the situation of alkane triol with using slightly water-soluble alkanediol, water-soluble 1,2-alkanediol, because the drying property of black liquid is more excellent, so not only to the recording medium of low absorbencys such as printed book paper, resin film etc. is not had the recording medium of absorbency fully, can realize high quality images yet.

Among the present invention, as the alkanediol of slightly water-soluble, preferred carbonatoms is the alkanediol more than 7, for example can enumerate 1,2-heptanediol, 1,2-ethohexadiol, 5-methyl-1,2-hexylene glycol, 4-methyl-1,2-hexylene glycol, 4,4-dimethyl-1,2-pentanediol etc.Wherein, 1,2-ethohexadiol more preferably.

In addition, as water-soluble 1,2-alkanediol, preferred carbonatoms is the alkanediol below 6, for example can enumerate 1,2-hexylene glycol, 1,2-pentanediol, 1,2-butyleneglycol, 4-methyl-1,2-pentanediol, 3,3-dimethyl-1,2-butyleneglycol etc.In the above-mentioned water-soluble alkanediol, surface tension when more preferably making 15% aqueous solution is the following water-soluble alkanediol of 28mN/m, preferred especially 1,2-hexylene glycol (surface tension: 26.7mN/m), 4-methyl 1,2-pentanediol (surface tension: 25.4mN/m), 3,3-dimethyl-1,2-butyleneglycol (surface tension: 26.1mN/m).The viewpoint of the smell from printing is considered, preferred 1,2-hexylene glycol.

In addition, among the present invention, as the dehydration polycondensate two alkylene glycol of alkylene glycol, preferred carbonatoms is 2～4 two alkylene glycol, for example can enumerate glycol ether or two butadiene glycol.

In the above-mentioned two alkylene glycol, the surface tension when more preferably making 10% aqueous solution is 60mN/m two alkylene glycol once, preferred especially dipropylene glycol (surface tension: 53mN/m).

In above-mentioned three kinds of alcoholic solvents, the alkanediol of slightly water-soluble and the content of water-soluble 1,2-alkanediol ratio are preferably 6:1～1:3, more preferably 6:1～1:1.By being set in this scope, the alkanediol of slightly water-soluble stably being dissolved in the black liquid, and then can improving ejection stability.On the other hand, the above-mentioned scope of the ratio of water-soluble 1,2-alkanediol is difficult to obtain simultaneously black liquid initial viscosity reduction and the uneven minimizing of aggegation for a long time.In addition, the above-mentioned scope of the ratio of water-soluble 1,2-alkanediol is difficult to make the alkanediol of slightly water-soluble stably to be dissolved in the black liquid after a little while, thereby being difficult to suppress changes or keep storage stability through out of date viscosity.

In addition, the content of the alkanediol of slightly water-soluble and two alkylene glycol is preferably 1:1～1:18, more preferably 1:1～1:6.By being set in this scope, can reducing the initial viscosity of black liquid, and can realize that good obstruction is restorative.On the other hand, the above-mentioned scope of the ratio of two alkylene glycol for a long time, the viscosity increased of black liquid initial viscosity, drying property reduces.In addition, the above-mentioned scope of the ratio of two alkylene glycol is stopped up restorative variation after a little while, and drying property increases, so be difficult to guarantee the wetting expansion time of black liquid, therefore black liquid is difficult to the recording medium that is covered, and is easy to generate lineae ablicantes.

In addition, the content ratio of water-soluble 1,2 one alkanediol and two alkylene glycol is preferably 1:1～1:36, more preferably 1:1～1:18.By being set in this scope, when on printed book paper, printing, can further suppress lineae ablicantes and harsh feeling with low exploring degree.On the other hand, the above-mentioned scope of the ratio of water-soluble 1,2-alkanediol for a long time, black liquid initial viscosity increases, drying property reduces.In addition, the above-mentioned scope of the ratio of two alkylene glycol is stopped up restorative variation after a little while, because drying property increases, so be difficult to guarantee the wetting expansion time of black liquid, therefore black liquid is difficult to the recording medium that is covered, and is easy to generate lineae ablicantes.

The alkanediol that preferably contains 1～3 weight % slightly water-soluble, more preferably 1.5～2.5 weight % with respect to ink composition integral body.When being less than 1 weight %, in the low recording medium of the black liquid absorptivity of printed book paper and so on, produce the printing inequality sometimes.And when surpassing 3 weight %, can not be dissolved in fully in the black liquid sometimes.

Preferably contain water-soluble 1, the 2-alkanediol of 0.5～6 weight %, more preferably 0.5～3.0 weight %.When being less than 0.5 weight %, the alkanediol of slightly water-soluble is dissolved in the black liquid.And when surpassing 6 weight %, the initial viscosity of black liquid increases sometimes, so not preferred.

Preferably contain 3～18 weight %, two alkylene glycol, more preferably 5～8 weight % with respect to ink composition integral body.When being less than 3 weight %, when on printed book paper, printing, produce lineae ablicantes and harsh feeling sometimes with low exploring degree.And when surpassing 18 weight %, the drying property of the print after the printing just is poor sometimes.

＜coloured material 〉

As the coloured material that is used for ink composition for ink-jet recording of the present invention, can use in the dye well pigment any, but consider from photostabilization or water-proof viewpoint, can preferably use pigment.

As pigment, can use mineral dye and pigment dyestuff, can use or make up multiple the use respectively separately.As described mineral dye, for example except that can using titanium oxide and ferric oxide, can also use carbon black by the preparation of known method such as contact process, oven process, hot method.In addition, as described pigment dyestuff, can use azo pigment (comprise azo lake, insoluble azo colour, condense azo pigment, chelating azo pigment etc.), polycycle pigment (for example phthalocyanine pigment, perylene dye, purple cyclic ketones pigment, anthraquinone pigment, quinacridone pigment, triazine dioxin pigment, thioindigo color, isoindolinone pigment, quinophthalone (キ ノ Off ラ ロ Application)) pigment etc.), dyestuff inner complex (for example basic dye type chelates, acidic dye type chelate etc.), nitropigments, nitroso pigments, nigrosine etc.

The kind (color) of the ink composition that can obtain according to desire is suitably enumerated the concrete example of pigment.For example, the pigment of using as the yellow ink fluid composition, can enumerate C.I. Pigment Yellow 73 1,2,3,12,14,16,17,73,74,75,83,93,95,97,98,109,110,114,128,129,138,139,147,150,151,154,155,180,185 etc., can use in the above-mentioned pigment more than a kind or 2 kinds.In the above-mentioned pigment, preferred especially use from the group that constitutes by C.I. Pigment Yellow 73 74,110,128 and 147, select more than a kind or 2 kinds.In addition, as the pigment that the magenta ink fluid composition is used, for example can enumerate C.I. Pigment red 5,7,12,48 (Ca), 48 (Mn), 57 (Ca), 57: 1,112,122,123,168,184,202,209; C.I. pigment violet 19 etc., can use in the above-mentioned pigment more than a kind or 2 kinds.In the above-mentioned pigment, preferred especially use from by C.I. pigment red 122,202,209 and the group that constitutes of C.I. pigment violet 19 select more than a kind or 2 kinds.In addition, as the pigment that the cyan ink fluid composition is used, for example can enumerate C.I. pigment blue 1,2,3,15:3,15:4,15:34,16,22,60; C.I. vat blue 4,60 etc., can use in the above-mentioned pigment more than a kind or 2 kinds.In the above-mentioned pigment, especially preferably use the C.I. pigment Blue 15: 3 and/or 15:4, especially preferably use the C.I. pigment Blue 15: 3.

In addition, as the pigment that the black ink fluid composition is used, for example can enumerate mineral dyes such as carbon black (C.I. Pigment black 7) class, iron oxide pigment such as furnace treated black, dim, Shawinigan black, thermally oxidized black; Nigrosine pigment dyestuffs such as (C.I. Pigment blacks 1) etc., but among the present invention, can preferably use carbon black.As carbon black, specifically can enumerate #2650, #2600, #2300, #2200, #1000, #980, #970, #966, #960, #950, #900, #850, MCF-88, #55, #52, #47, #45, #45L, #44, #33, #32, #30 (above Mitsubishi Chemical (strain) system), SpecialBlaek4A, 550, Printex95,90,85,80,75,45,40 (above Degussa society system), Regal660, RmogulL, monarch1400,1300,1100,800,900 (above Cabot society system), Raven7000,5750,5250,3500,3500,2500ULTRA, 2000,1500,1255,1200,1190ULTRA, 1170,1100ULTRA, Raven5000UIII (above Columbian society system) etc.

Suitable pigment concentration (content) got final product when the concentration adjustment of pigment was the modulation ink composition, thus be not particularly limited, but be generally 5～20 weight %.

From the glossiness that obtains image simultaneously, the storage stability of preapring for an unfavorable turn of events bronze rust and ink composition, the viewpoint that can form the more excellent coloured image of glossiness simultaneously considers that preferred described pigment is and following dispersion agent carries out the pigment that mixing processing obtains.

＜dispersion agent 〉

In the ink composition of the present invention,, preferably contain at least a kind of resin from vinylbenzene-acrylic acid or the like copolymer resins, polyurethanes resin and fluorenes resinoid, selecting as making coloured material dispersive dispersion agent.Above-mentioned copolymer resins is adsorbed on the pigment, improves dispersed.

Concrete example as the hydrophobic monomer of copolymer resin, for example can enumerate methyl acrylate, methyl methacrylate, ethyl propenoate, Jia Jibingxisuanyizhi, the vinylformic acid n-propyl, n propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, n-butyl acrylate, n-BMA, sec-butyl acrylate, the secondary butyl ester of methacrylic acid, tert-butyl acrylate, the methacrylic tert-butyl acrylate, the just own ester of vinylformic acid, the just own ester of methacrylic acid, the vinylformic acid n-octyl, n octyl methacrylate, Isooctyl acrylate monomer, Isooctyl methacrylate, vinylformic acid 2-ethylhexyl, methacrylic acid 2-ethylhexyl, decyl acrylate, decyl-octyl methacrylate, dodecylacrylate, lauryl methacrylate, the vinylformic acid stearyl, the methacrylic acid stearyl, vinylformic acid 2-hydroxy methacrylate, methacrylic acid 2-hydroxy methacrylate, vinylformic acid 2-hydroxy propyl ester, methacrylic acid 2-hydroxy propyl ester, vinylformic acid 2-dimethylamino ethyl ester, methacrylic acid 2-dimethylamino ethyl ester, vinylformic acid 2-diethylamino ethyl ester, methacrylic acid 2-diethylamino ethyl ester, the vinylformic acid glycidyl esters, methyl propenoic acid glycidyl base ester, allyl acrylate, allyl methacrylate(AMA), cyclohexyl acrylate, cyclohexyl methacrylate, phenyl acrylate, phenyl methacrylate, vinylformic acid nonyl phenyl ester, methacrylic acid nonyl phenyl ester, benzyl acrylate, benzyl methacrylate, vinylformic acid dicyclopentenyl ester, methacrylic acid dicyclopentenyl ester, vinylformic acid bornyl ester, methacrylic acid bornyl ester, diacrylate 1,3-butanediol ester, dimethacrylate 1,3-butanediol ester, diacrylate 1,4 one butanediol esters, dimethacrylate 1,4 one butanediol esters, ethylene glycol diacrylate, Ethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, Viscoat 335HP, tetraethylene glycol dimethacrylate, polyethyleneglycol diacrylate, polyethylene glycol dimethacrylate, diacrylic acid pentyl diol ester, diacrylate 1,6 oneself diol esters, oneself diol ester of dimethacrylate 1,6, the dipropylene glycol diacrylate, the dipropylene glycol dimethacrylate, Viscoat 295, trimethylolpropane trimethacrylate, the glycerol acrylate, the glycerol methacrylic ester, vinylbenzene, vinyl toluene, Vinyl toluene etc.Above-mentioned monomer can use separately or mix more than 2 kinds and use.

As the concrete example of hydrophilic monomer, for example can enumerate vinylformic acid, methacrylic acid, toxilic acid, methylene-succinic acid etc.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form simultaneously the more excellent coloured image of glossiness considers, the copolymer resins of described hydrophobic monomer and hydrophilic monomer is preferably at least a in vinylbenzene-(methyl) acrylic copolymeric resin, vinylbenzene-vinyl toluene-(methyl) acrylic copolymeric resin or vinylbenzene-maleic acid copolymerized resin, (methyl) vinylformic acid one (methyl) acrylic copolymer resin or vinylbenzene-(methyl) vinylformic acid one (methyl) acrylic copolymer resin.

Described copolymer resins can make vinylbenzene and vinylformic acid or acrylic acid ester react the resin (vinylbenzene-acrylic resin) of the polymkeric substance that obtains for containing.Perhaps, described copolymer resins can be the acrylic acid or the like water soluble resin.Perhaps can be the salt of the sodium of above-mentioned substance, potassium, ammonium etc.

Consider from the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that the while can form the more excellent coloured image of glossiness, the content of above-mentioned copolymer resins is with respect to the described pigment of 100 weight parts, be preferably 10～50 weight parts, more preferably 10～35 weight parts.

In addition, among the present invention,, the storage stability of the glossiness of coloured image, the bronze colour of preapring for an unfavorable turn of events and ink composition can be obtained simultaneously, the more excellent coloured image of glossiness can be formed simultaneously by using urethane resin as pigment dispersing agent.So-called urethane resin is, contains the resin that makes the polymkeric substance that diisocyanate cpd and diol compound reaction obtain, and among the present invention, is preferably the resin with urea key and/or amido linkage and acidic-group.

As diisocyanate cpd, for example can enumerate 1,6-hexamethylene diisocyanate, 2,2, aromatic diisocyanate compounds, their modifiers such as aromatic-aliphatic diisocyanate cpd, tolylene diisocyanate, methylenebis phenyl isocyanate such as 4 one trimethylammoniums, 1,6-hexamethylene diisocyanate.

As diol compound, for example can enumerate polyester, polycarbonate-based such as polyethers such as polyoxyethylene glycol, polypropylene glycol, polyethylene glycol adipate, poly adipate succinic acid ester.

Described urethane resin preferably has carboxyl.

In addition, among the present invention,, also can use the fluorenes resinoid as pigment dispersing agent.

The weight ratio of described copolymer resins and described urethane resin (the former/latter) be preferably 1/2～2/1, but storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form simultaneously the more excellent coloured image of glossiness considers, more preferably 1/1.5～1.5/1.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the viewpoint consideration of the more excellent coloured image of glossiness, and the weight ratio of the solid state component beyond the solid state component of described pigment and the pigment (the former/latter) be preferably 100/20～100/80.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form the more excellent coloured image of glossiness is simultaneously considered, the content of described copolymer resins is 10～50 weight parts with respect to the described pigment optimization of 100 weight parts, more preferably 10～35 weight parts.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form the more excellent coloured image of glossiness is simultaneously considered, the content of described urethane resin is 10～40 weight parts with respect to the described pigment optimization of 100 weight parts, more preferably 10～35 weight parts.

From the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form the more excellent coloured image of glossiness is simultaneously considered, the resinoid content of described fluorenes is with respect to the described pigment of 100 weight parts, be preferably 20～200 weight parts, more preferably 10～80 weight parts.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, the viewpoint that can form the more excellent coloured image of glossiness is simultaneously considered, the total amount of preferred described copolymer resins and described urethane resin is used 90 weight parts following (more preferably 70 weight parts are following) with respect to the described pigment of 100 weight parts.

From the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the more excellent viewpoint of glossiness and consider that the acid number of described copolymer resins is preferably 50～320, more preferably 100～250.

From the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the more excellent viewpoint of glossiness and consider that the acid number of described urethane resin is preferably 10～300, more preferably 20～100.Need to prove that acid number is the mg amount of the required KOH of summation 1g resin.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the more excellent viewpoint of glossiness and consider that the weight-average molecular weight of described copolymer resins (Mw) is preferably 2,000～30,000, more preferably 2,000～20,000.

Storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the more excellent viewpoint of glossiness considers, weight-average molecular weight (Mw) before described urethane resin crosslinked is preferably 100～200,000, and more preferably 1000～50,000.For example use GPC (gel permeation chromatography) to measure Mw.

From the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form the more excellent viewpoint of glossiness simultaneously and consider the second-order transition temperature (Tg of described copolymer resins; Measure according to JISK6900) be preferably more than 30 ℃ more preferably 50～130 ℃.

From the storage stability of the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form the more excellent viewpoint of glossiness simultaneously and consider the second-order transition temperature (Tg of described urethane resin; Measure according to JISK6900) be preferably-50～200 ℃, more preferably-50～100 ℃.

Described copolymer resins has situation and the free situation that is adsorbed in the pigment in dispersible pigment dispersion, storage stability from the glossiness that obtains coloured image simultaneously, the bronze colour of preapring for an unfavorable turn of events and ink composition, can form simultaneously the more excellent viewpoint of glossiness considers, the maximum particle diameter of described copolymer resins is preferably below the 0.3 μ m, and further preferred median size is 0.2 μ m following (more preferably 0.1 μ m is following).Need to prove that median size is the mean value in the dispersion of particles footpath (accumulation 50% footpath) that forms of pigment reality, for example can use Microtrac UPA (MicrotracInc. society) to measure in dispersion liquid.

In addition, described fluorenes resin just without any qualification, for example can obtain by the following monomeric unit of copolymerization so long as have the resin of fluorene skeleton.

Hexanaphthene, 5-isocyanate group-1-(isocyanatomethyl)-1,3,3-trimethylammonium (CASNo.4098-71-9)

Ethanol, 2,2 '-[9H-fluorenes-9-indenes two (4,1-phenylene oxygen base)] two (CAS No.117344-32-8)

Propionic acid, 3-hydroxyl-2-(hydroxymethyl)-2-methyl (CAS No.4767-03-7)

Ethamine, N, N-diethyl-(CAS No.121-44-8)

In addition, as dispersion agent, can use tensio-active agent.As above-mentioned tensio-active agent, can enumerate aniorfic surfactant such as fatty acid salt, senior alkyl dicarboxylate, higher alcohol sulfate salt, senior alkyl sulfonate, higher fatty acid and amino acid whose polycondensate, sulfosuccinate ester salt, naphthenate, liquid aliphatic oil sulfuric ester salt, alkylallyl sulfonate class; Cationic surfactants such as lipid acid amine salt, quaternary ammonium salt, sulfonium salt, Phosphonium; Nonionic surface active agent such as Voranol EP 2001 class, polyxyethylated ester class, Sorbic Acid alkyl esters, polyoxyethylene Sorbic Acid alkyl esters etc.Certainly by in ink composition, adding above-mentioned tensio-active agent, also can realize function as tensio-active agent.

＜tensio-active agent 〉

Ink composition for ink-jet recording of the present invention contains tensio-active agent as essential composition.As recording medium, for be useful on the recording medium that the resin of accepting black liquid obtains in its surface coated, by using tensio-active agent, even in the recording mediums such as developing out paper of more paying attention to reflecting feel, also can realize having excellent glossy image.Especially under the situation of using the recording medium that is provided with the coating layer that is used to accept oiliness China ink liquid on printed book paper and so on the receiving layer on the surface, also can prevent the leakage profit (diffusion) between color, can prevent from simultaneously to follow black liquid adhesion amount to increase and albefaction that the reflection of light photoconduction of generation causes.

As being used for tensio-active agent of the present invention, can preferably use organopolysiloxane class tensio-active agent, when forming document image, can improve wettability, thereby improve the perviousness of black liquid on the recording medium surface.When using organopolysiloxane class tensio-active agent,,, suppress generations such as insolubles, thereby can realize the more excellent ink composition of ejection stability so can improve the solvability of tensio-active agent in black liquid owing to contain the alcoholic solvent of above-mentioned three kinds.

Above-mentioned tensio-active agent can use commercially available tensio-active agent, for example can use Olfine PD-501 (Nishin Chemical Industry Co. Lt's system), Olfine PD-502 (Nishin Chemical Industry Co. Lt's system), Olfine PD-570 (Nishin Chemical Industry Co. Lt's system) etc.

In addition, as organopolysiloxane is tensio-active agent, can more preferably contain one or two or more kinds compound of following formula (I) expression, or to contain in the compound of above-mentioned formula (I) R be that hydrogen atom or methyl, a are that 2～13 integer, m are that 2～50 integer, n are one or two or more kinds compound of 1～5 integer.In addition, more preferably containing R in the compound of above-mentioned formula (I) is that hydrogen atom or methyl, a are that 2～13 integer, m are that 2～50 integer, n are one or two or more kinds compound of 1～8 integer.Perhaps more preferably contain R in the compound of above-mentioned formula (I) and be methyl, a and be 6～18 integer, m and be 0, n is one or two or more kinds compound of 1.By using above-mentioned specific organopolysiloxane class tensio-active agent, under the situation of printing on the printed book paper as recording medium, also can further improve the aggegation inequality of black liquid.

(in the formula, R represents hydrogen atom or methyl, and a represents 2～11 integer, and m represents 2～50 integer, and n represents 1～5 integer.)

More preferably using in the compound of above-mentioned formula (I) a is 2～5 integer, and m is that 20～40 integer, n are the compound of 2～4 integer; A is that 7～11 integer, m are that 30～50 integer, n are the compound of 3～5 integer; A is that 9～13 integer, m are that 2～4 integer, n are the compound of 1～2 integer; Perhaps a is that 6～10 integer, m are that 10～20 integer, n are the compound of 4～8 integer.By using above-claimed cpd, can further improve the aggegation inequality of black liquid.For example, tensio-active agent is that to mix R in the above-mentioned formula (I) be that methyl, a are that 9～13 integer, m are that 2～4 integer, n are that the compound of 1～2 integer and R are that hydrogen atom, a are that 7～11 integer, m are that 30～50 integer, n are the tensio-active agent that the compound of 3～5 integer obtains.

In addition, more preferably using R in the compound of above-mentioned formula (I) is that 2～5 integer, m are that 20～40 integer, n are the compound of 2～4 integer as hydrogen atom, a; Perhaps a is that 7～11 integer, m are that 30～50 integer, n are the compound of 3～5 integer.By using above-claimed cpd, can further improve the uneven and leakage profit of aggegation of black liquid.

In addition, further preferably using in the compound of above-mentioned formula (I) R is that 9～13 integer, m are that 2～4 integer, n are the compound of 1～2 integer as methyl, a; Perhaps a is that 6～10 integer, m are that 10～20 integer, n are the compound of 4～8 integer.By using above-claimed cpd, can further improve the uneven and leakage profit of aggegation of black liquid.

And then, more preferably use in the compound of above-mentioned formula (I) R as methyl, a be that 6～12 integer, m are 0, n is 1 compound.By using above-claimed cpd, can further improve the uneven and leakage profit of aggegation of black liquid.

In addition, most preferably using R in the compound that mixes above-mentioned formula (I) is that 7～11 integer, m are that 30～50 integer, n are that the compound, R of 3～5 integer is that 9～13 integer, m are that 2～4 integer, n be the compound of 1～2 integer and R as methyl, a are that 6～10 integer, m are that 10～20 integer, n are the tensio-active agent that the compound of 4～8 integer obtains as methyl, a as hydrogen atom, a.By using above-claimed cpd, can further improve the uneven and leakage profit of aggegation of black liquid.

And then, most preferably use mix R in the above-mentioned formula (I) as hydrogen atom, a be 7～11 integer, m be 30～50 integer, n be 3～5 integer compound, R as methyl, a be 9～13 integer, m be 2～4 integer, n be the compound of 1～2 integer and R as methyl, a be that 6～18 integer, m are 0, n is the tensio-active agent that 1 compound obtains.By using above-claimed cpd, can further improve the uneven and leakage profit of aggegation of black liquid.

In ink composition of the present invention, preferably contain 0.01～1.0 weight %, more preferably contain the above-mentioned tensio-active agent of 0.05～0.50 weight %.In addition, and be the above-mentioned tensio-active agent of methyl and the above-mentioned tensio-active agent person that R is hydrogen atom with R, the small font literal is indeformable, so comparatively preferred.Especially from the viewpoint of the aggegation inequality of black liquid, when preferably using R as the above-mentioned tensio-active agent of methyl, when using R as the above-mentioned tensio-active agent of H, content is many.

And then, be the above-mentioned tensio-active agent of methyl with respect to R, make R be H above-mentioned tensio-active agent content for a long time, comparatively preferred.That thus, can improve cast-coated paper and so on flicks easily that black liquid, seepage velocity are slow, the aggegation of the black liquid in printed book paper is uneven and leak profit.

Can also add other tensio-active agents in the ink composition of the present invention, particularly be acetylenediol class tensio-active agent, aniorfic surfactant, nonionic surface active agent, amphoterics etc.

In the above-mentioned tensio-active agent, as acetylenediol class tensio-active agent, for example can enumerate 2,4,7,9 one tetramethyl-s-5-decine-4,7-glycol, 3,6-dimethyl-4-octyne-3,6-glycol or 3,5-dimethyl-1-hexin-3-alcohol, 2,4-dimethyl-5-hexin-3-alcohol etc.In addition, acetylenediol class tensio-active agent also can use commercially available product, for example can enumerate Olfine E1010, STG, Y (trade(brand)name, day chemical society of letter system), Surfynol 61,104,82,465,485 or TG (trade(brand)name, air Chemicals company limited system).

＜water, other compositions 〉

Ink composition for ink-jet recording of the present invention contains above-mentioned specific alcoholic solvent and tensio-active agent, other various additives, contains water simultaneously as solvent.Water preferably uses pure water or ultrapure waters such as ion exchanged water, ultrafiltration water, reverse osmosis water, distilled water.Particularly with above-mentioned water by uviolizing or add that hydrogen peroxide etc. carries out that water after the sterilising treatment prevents for a long time that mould or bacterium from producing and preferred.

In addition, preferred ink composition of the present invention also contains permeate agent except that containing mentioned component.

As permeate agent, can preferably use glycol ethers.

Concrete example as glycol ethers, can enumerate the glycol monomethyl methyl ether, ethylene glycol monomethyl ether, glycol monomethyl-isopropyl ether, glycol monomethyl-n-butyl ether, glycol monomethyl-isobutyl ether, glycol monomethyl-tertbutyl ether, the ethylene glycol monomethyl ether acetate, the diglycol monotertiary methyl ether, carbiphene, diglycol monotertiary-n-propyl ether, diglycol monotertiary-isopropyl ether, diglycol monotertiary-n-butyl ether, diglycol monotertiary-tertbutyl ether, triglycol list-n-butyl ether, propylene glycol monomethyl ether, propylene glycol list ethyl ether, propylene glycol list-n-propyl ether, propylene glycol list-isopropyl ether, propylene glycol list-n-butyl ether, propylene glycol list-tertbutyl ether, the dipropylene glycol monomethyl ether, dipropylene glycol list ethyl ether, dipropylene glycol list-n-propyl ether, dipropylene glycol-isopropyl ether, dipropylene glycol list-n-butyl ether, dipropylene glycol list-tertbutyl ether, 1-methyl-1-methoxybutanols etc. can use in the above-claimed cpd a kind or use with the mixture more than 2 kinds.

In the above-mentioned glycol ethers, the alkyl oxide of preferred polyol, preferred especially ethylene glycol monomethyl ether, glycol monomethyl-n-butyl ether, diglycol monotertiary methyl ether, carbiphene, diglycol monotertiary-n-butyl ether, propylene glycol monomethyl ether, propylene glycol list ethyl ether, propylene glycol single-butyl ether, triglycol monomethyl ether, triglycol list ethyl ether or triglycol list-n-butyl ether.Triglycol list-n-butyl ether more preferably.

The addition of above-mentioned permeate agent can suitably determine, but is preferably about 0.1～30 weight %, more preferably about 1～20 weight %.

In addition, preferred ink composition of the present invention also contains the recording medium solvating agent except that containing mentioned component.

As the recording medium solvating agent, can preferably use N-methyl-pyrrolidinone compounds such as 2-pyrrolidone.The addition of aforementioned recording medium solvating agent can suitably determine, but is preferably about 0.1～30 weight %, more preferably about 1～20 weight %.

In addition, do not contain wetting agent in fact in the preferred ink composition for ink-jet recording of the present invention.Wetting agent has the function that prevents black liquid dry solidification in inkjet nozzle etc., so when black drop was gone on the low synthetic paper of the black liquid absorptive character of film, black liquid was moist, becomes problem sometimes when high speed printing.In addition, when using the black liquid contain wetting agent, unabsorbed black liquid is present in the recording medium surface, and under this state, black liquid subsequently is attached on the recording medium, so produce the aggegation inequality sometimes.

Therefore, among the present invention, when using the low recording medium of above-mentioned black liquid absorptive character, preferably do not contain the black liquid of wetting agent in fact.Need to prove, even under the situation of black liquid dry solidification in inkjet nozzle, by being suitable for the solution contain wetting liquid, also can be dissolving cured again black liquid.

Particularly in the present invention, the preferred vapour pressure that does not contain in fact under 25 ℃ is the wetting agent below the 2mPa.What is called does not contain in fact, represents that the addition of above-mentioned wetting agent is less than 1 weight % with respect to ink composition.

Vapour pressure under 25 ℃ is that the content of the wetting agent below the 2mPa is less than 1 weight % with respect to black liquid, the low recording medium of black liquid absorptivity such as printed book paper not only thus, even at metal that does not have black liquid receptivity fully or plastics, also can print by ink-jet recording.Need to prove that a part of above-mentioned penetrating solvent also plays a role as wetting agent, it is clear and definite to those skilled in the art, but in this manual, above-mentioned penetrating solvent is not included in the wetting agent.In addition, in this specification sheets, above-mentioned alcoholic solvent is not included in the wetting agent.

Wetting agent in this specification sheets, expression is used for the wetting agent of common ink jet record ink liquid, be specially glycerol, ethylene glycol, 1, carbonatomss such as 3-propylene glycol, 3-methyl-1,3-butyleneglycol, 1,3-butyleneglycol, 1,2-pentanediol are 3～5 water-soluble alkanediol or TriMethylolPropane(TMP), Pehanorm, trimethylolethane etc.

Ink composition of the present invention can also add plugging inhibitor, sanitas, antioxidant, electric conductivity conditioning agent, pH regulator agent, viscosity modifier, surface tension modifier, oxygen absorbent of nozzle etc.

Example as the sanitas mould inhibitor, can enumerate Sodium Benzoate, sodium pentachlorophenol, 2-pyridine mercaptan-1-sodium oxide, sodium sorbate, Sodium dehydroacetate, 1,2-bisbenzothiazole quinoline-3-ketone (the Proxel CRL of ICI society, Proxel BND, Proxel GXL, Proxel XL-2, Proxel TN) etc.

And then, as the pH regulator agent, solubility promoter or examples of antioxidants can be enumerated diethanolamine, trolamine, Propanolamine, amine and their modifiers such as morpholine, potassium hydroxide, sodium hydroxide, inorganic salts such as lithium hydroxide, ammonium hydroxide, quaternary ammonium hydroxide (tetramethyl-ammonium etc.), salt of wormwood, yellow soda ash, carbonates such as Quilonum Retard, other phosphoric acid salt etc., or N-methyl-2-pyrrolidone, urea, thiocarbamide, urea classes such as tetramethyl-urea, allophanate, allophanate classes such as uramido methyl formate, biuret, the dimethyl biuret, biuret classes such as tetramethyl-biuret etc., L one xitix and salt thereof.

In addition, ink composition of the present invention can contain antioxidant and UV light absorber, as this example, can enumerate Tinuvin328,900,1130,384,292,123,144,622,770,292, Irgacor252 153, Irganox1010,1076,1035, the MD1024 of Ciba society, oxide compound of lanthanon etc.

Ink composition of the present invention can carry out dispersing and mixing with above-mentioned each composition with appropriate means and prepare.Be preferably as follows modulation: at first pigment, macromolecule dispersing agent and water are mixed with suitable dispersion machine (for example ball mill, sand mill, masher, roller mill, agitator mill, prosperous house youngster mixing machine, colloidal mill, ultrasonic wave refiner, airflow milling, Ong mill etc.), modulate uniform dispersible pigment dispersion, then, add other synthetic resin (resin emulsion), water, water-miscible organic solvent, sugar, pH regulator agent, sanitas, mould inhibitor etc., it is fully dissolved, modulate black liquor.After fully stirring, cause the thick particle diameter that stops up and foreign matter and filter, can obtain the target ink composition in order to remove.

Ink jet recording method

Ink jet recording method of the present invention be the ejection above-mentioned ink composition drop, make this drop attached to the method that prints on the recording medium.In the recording method of the present invention, as recording medium, preferred synthetic paper or the printed book paper of using, even especially with low exploring degree at art paper, be used for POD and (print on demand, Print On Demand) under the situation of printing on the dedicated paper that the high image quality of purposes is used with paper and Laser Printing, also can realize not having the high quality images of lineae ablicantes and harsh feeling.As the high image quality paper of POD purposes, for example can enumerate Ricoh business coat gross 100 (Ricoh Co., Ltd's system) etc.In addition, as the dedicated paper that Laser Printing is used, for example can enumerate LPCCTA4 (Seiko Epson Corp's system).

[embodiment]

Below, illustrate in greater detail the present invention by embodiment, but the present invention is not limited to these embodiment.

The modulation of＜ink composition 〉

Composition according to following table 1 mixes each composition, filters by the film filter with 10 μ m, modulates each black liquid.Need to prove that the vinylbenzene-acrylic resin in the table is that molecular weight is 1600, acid number is 150 multipolymer.The polyurethanes resin is that molecular weight is 6000, acid number is 50 multipolymer.In addition, the fluorenes resin is that to contain monomer, molecular weight that the monomer component ratio is about the fluorene skeleton with CAS No.117344-32-8 expression of 50 total amount % be 3300 resin.And then, the tensio-active agent that uses is an organopolysiloxane class tensio-active agent, is that to mix R in the above-mentioned formula (I) be that methyl, a are that 9～13 integer, m are that 2～4 integer, n are that the compound of 1～2 integer and R are that hydrogen atom, a are that 7～11 integer, m are that 30～50 integer, n are the tensio-active agent that the compound of 3～5 integer obtains.

Table 1 (continuing)

Embodiment 49～96 and comparative example 7～12

In addition, replace with the following tensio-active agent operation in the same manner, the black liquid group 49～96 of modulation embodiment and the black liquid group 7～12 of comparative example except that tensio-active agent with the black liquid group of the black liquid group of the foregoing description 1～48 and comparative example 1～6.

The tensio-active agent that is used for embodiment 49～96 and comparative example 7～12 is to be that methyl, a are that 6～10 integer, m are that 10～20 integer, n are the tensio-active agent of the compound formation of 4～8 integer by above-mentioned formula (I) R.

Embodiment 97～144 and comparative example 13～18

Except that the tensio-active agent with the black liquid group of the black liquid group of the foregoing description 1～48 and comparative example 1～6 replaces with the following tensio-active agent operation in the same manner, the black liquid group 97～144 of modulation embodiment and the black liquid group 13～18 of comparative example.

The tensio-active agent that is used for embodiment 97～144 and comparative example 13～18 is that to mix following formula (I) R be that hydrogen atom, a are that 7～11 integer, m are that 30～50 integer, n are that compound, the R of 3～5 integer is that methyl, a are that 9～13 integer, m are that 2～4 integer, n are that the compound of 1～2 integer and R are that methyl, a are that 6～10 integer, m are that 10～20 integer, n are the tensio-active agent that the compound of 4～8 integer obtains.

Embodiment 145～192 and comparative example 19～24

In addition, replace with the following tensio-active agent operation in the same manner, the black liquid group 145～192 of modulation embodiment and the black liquid group 19～24 of comparative example except that tensio-active agent with the black liquid group of the black liquid group of the foregoing description 1～48 and comparative example 1～6.

The tensio-active agent that is used for embodiment 145～192 and comparative example 19～24 is the tensio-active agent by above-mentioned formula (I) R is that methyl, a are that 6～18 integer, m are 0, n is 1 compound formation.

Embodiment 193～240 and comparative example 25～30

In addition, replace with the following tensio-active agent operation in the same manner, the black liquid group 193～240 of modulation embodiment and the black liquid group 25～30 of comparative example except that tensio-active agent with the black liquid group of the black liquid group of the foregoing description 1～48 and comparative example 1～6.

The tensio-active agent that is used for embodiment 193～240 and comparative example 25～30 be mix above-mentioned formula (I) R and be that hydrogen atom, a are that 7～11 integer, m are that 30～50 integer, n are that compound, the R of 3～5 integer is that methyl, a are that 9～13 integer, m are that 2～4 integer, n are that the compound of 1～2 integer and R are that methyl, a are that 6～18 integer, m are 0, n is the tensio-active agent that 1 compound obtains.

＜estimate

The evaluation of the initial viscosity of China ink liquid

Each black liquid at obtaining as mentioned above carries out the evaluation of black fluid viscosity.Use oscillating mode viscometer (MV100 model, mountain one motor society system), measure behind the just black liquid of modulation viscosity, estimate according to following benchmark through the black liquid after 1 hour.Need to prove that measuring temperature is 20 ℃.

S: viscosity is below the 4mPas.

AA: viscosity is above 4mPas, below the 5mPas.

A: viscosity is above 5mPas, below the 6mPas.

B: viscosity is above 6mPas, below the 7mPas.

C: viscosity is above 7mPas, below the 8mPas.

D: viscosity is for surpassing 8mPas.

Evaluation result is shown in following table 2.

The evaluation of the process viscosity of China ink liquid

After 3 days, measure the viscosity of black liquid in placement under 70 ℃ the environment with modulating the black liquid that obtains as mentioned above same as described abovely, estimate according to following benchmark.

A: with the difference of initial viscosity be below the 0.5mPas.

B: with the difference of initial viscosity for surpass 0.5mPas, below the 1.0mPas.

C: with the difference of initial viscosity for surpass 1.0mPas, below the 2.0mPas.

D: surpass 2.0mPas with the difference of initial viscosity.

Evaluation result is shown in following table 2.

The black liquid aggegation inequality beyond the cast-coated paper and the evaluation of inking

With each black liquid of the above-mentioned Y that obtains, M, C and K as black liquid group, be placed in the print cartridge of ink-jet printer (PX-G920, Seiko Epson society system), make it carry out record in main-scanning (head drives) direction and with 360dpi in subscan (recording medium transmission) direction with 720dpi.Then, regulate the voltage of printer, spot size when making land is about 7ng, is 720 * 360dpi goes up record 720 * 720dpi at OKT+ of about 128g/ square meter (Oji Paper's system) and LPCCT (Seiko Epson Corp's system) full images with single the driving.At two-way and unidirectional enforcement record, and under normal temperature, normal humidity environment, implement.China ink liquid adhesion amount is about the 3.6mg/inch square meter.

According to following benchmark the image of gained is estimated.

A: the bad lineae ablicantes that causes of aggegation inequality and inking in bidrectional printing, also occurs.

B: in bidrectional printing, do not have the aggegation inequality, but the bad lineae ablicantes that causes of inking is arranged.

C: the aggegation inequality is arranged in bidrectional printing, in unidirectional printing, do not have the aggegation inequality, but the bad lineae ablicantes that causes of inking takes place.

D: the bad lineae ablicantes that causes of aggegation inequality and inking is arranged in unidirectional printing.

The result is shown in following table 2.

The black liquid aggegation inequality of cast-coated paper and the evaluation of inking

With each black liquid of the above-mentioned Y that obtains, M, C and K as black liquid group, be placed in the print cartridge of ink-jet printer (PX-G920, Seiko Epson society system), make it carry out record in main-scanning (head drives) direction and with 360dpi in subscan (recording medium transmission) direction with 720dpi.Then, regulate the voltage of printer, the spot size when making land is about 7ng, is 720 * 360dpi goes up record 720 * 720dpi at the Mirror of about 128g/ square meter Coat Platinum (Oji Paper's system) full images with single the driving.

On two-way and unidirectional, implement record, and under normal temperature, normal humidity environment, implement.China ink liquid adhesion amount is about the 3.6mg/inch square meter.According to following benchmark the image of gained is estimated.

A: the bad lineae ablicantes that causes of aggegation inequality and inking is also arranged in bidrectional printing.

B: in bidrectional printing, do not have the aggegation inequality, but the bad lineae ablicantes that causes of inking is arranged.

C: the aggegation inequality is arranged in bidrectional printing, in unidirectional printing, do not have the aggegation inequality, but the bad lineae ablicantes that causes of inking takes place.

D: the bad lineae ablicantes that causes of aggegation inequality and inking is arranged in unidirectional printing.

The result is shown in following table 2.

The evaluation of small font distortion

With each black liquid of the above-mentioned Y that obtains, M, C and K as black liquid group, be placed in the print cartridge of ink-jet printer (PX-G920, Seiko Epson society system), make it carry out record in main-scanning (head drives) direction and with 360dpi in subscan (recording medium transmission) direction with 720dpi.Next, regulate the voltage of printer under normal temperature, normal humidity environment, the some size when making land is about 7ng, is 720 * 360dpi, 720 * 720dpi recording full picture with single the driving, and the black liquid adhesion amount of this moment is about the 3.6mg/inch square meter.Under this condition, at the last Chinese character " rose " of the OKT+ of about 128g/ square meter (Oji Paper's system) in unidirectional printing type face 8 and font 12.

According to following benchmark the literal of gained is estimated.

A: the Chinese character of font 8 " rose " is identification easily.

B: though the Chinese character of font 12 " rose " identification easily, the Chinese character of font 8 " rose " can not be discerned easily.

C: the Chinese character of font 12 " rose " can not be discerned easily.

The result is shown in following table 2.

The evaluation of drying property

In addition, except that using polyethylene terephthalate film (RUMIRER, Dong Li society system) to replace OKT+ and LPCCT, print with recording method same as described above as the recording medium.The print that makes gained applies 500g/cm after 3 minutes, loading XeroxP (Xerox society system) at printing surface in drying under the environment of 15%RH under 40 ℃ ²Weight, placed 3 minutes.Then, use the SPM50 of Gretag society system to measure the OD value of XeroxP, carry out the evaluation of drying property from the face of print transfer ink liquid.Metewand is as follows.

The A:OD value is less than 0.2

The B:OD value is more than 0.2

The result is shown in following table 2.

Stop up restorative evaluation

Use above-mentioned print cartridge and ink-jet printer, press black liquid exchange button after, take off socket.As mentioned above, make it be in the state that breaks away from ink-jet head cap (head cap) after, printer was placed 2 days under 40 ℃, the environment of 15%RH.

After the placement, the repeated washing action recovers easiness until the black liquid of all nozzle ejections with initial same degree based on following judgment standard evaluation.

A: 3 cleaning operations repeatedly, stop up and recover.

B: 6 cleaning operations repeatedly, stop up and recover.

C: 12 cleaning operations repeatedly, stop up and recover.

D: even 12 cleaning operations repeatedly stop up and also do not recover.

The result is shown in following table 2.

Table 2 (continuing)

Table 2 (continuing)

When embodiment 49～96 and comparative example 7～12 also carry out evaluation same as described above, in the evaluation of the black liquid aggegation inequality of cast-coated paper and inking, observe the raising of a grade.But, in the evaluation of small font distortion, observe the deterioration of two grades.Embodiment 1～48 and comparative example 1～6 are identical evaluation result (being omitted in the record in the table 2).

In addition, when embodiment 97～144 and comparative example 13～18 are also carried out evaluation same as described above, in the evaluation of the black liquid aggegation inequality of cast-coated paper and inking, observe the raising of a grade.But, in the evaluation of small font distortion, observe the deterioration of a grade.Embodiment 1～48 and comparative example 1～6 are identical evaluation result (being omitted in the record in the table 2).

In addition, when embodiment 145～192 and comparative example 19～24 are also carried out evaluation same as described above, in the evaluation of the black liquid aggegation inequality of cast-coated paper and inking, observe the raising of a grade.But, in the evaluation of small font distortion, observe the deterioration of a grade.Embodiment 1～48 and comparative example 1～6 are identical evaluation result (being omitted in the record in the table 2).

In addition, when embodiment 193～240 and comparative example 25～30 are also carried out evaluation same as described above, in the evaluation of the black liquid aggegation inequality of cast-coated paper and inking, observe the raising of a grade.But, in the evaluation of small font distortion, observe the deterioration of a grade.Embodiment 1～48 and comparative example 1～6 are identical evaluation result.

Claims (26)

1, a kind of ink composition for ink-jet recording, it is the ink composition for ink-jet recording that contains coloured material, water, alcoholic solvent and tensio-active agent at least, wherein,

Alcoholic solvent contains the alkanediol of slightly water-soluble, water miscible 1,2-alkanediol and two alkylene glycol.

2, ink composition for ink-jet recording as claimed in claim 1, wherein, the alkanediol of described slightly water-soluble is that carbonatoms is the alkanediol more than 7.

3, ink composition for ink-jet recording as claimed in claim 1 or 2, wherein, described water miscible 1,2-alkanediol is that carbonatoms is the alkanediol below 6.

4, as each described ink composition for ink-jet recording in the claim 1～3, wherein, the alkanediol of described slightly water-soluble and the content of described water miscible 1,2-alkanediol are than being 6:1～1:3.

5, as each described ink composition for ink-jet recording in the claim 1～4, wherein, the content of the alkanediol of described slightly water-soluble and described two alkylene glycol is than being 1:1～1:18.

6, as each described ink composition for ink-jet recording in the claim 1～5, wherein, the content sum of the alkanediol of described slightly water-soluble and described water miscible 1,2-alkanediol is below the 6 weight % with respect to ink composition.

7, as each described ink composition for ink-jet recording in the claim 1～6, wherein, the content sum of the alkanediol of described slightly water-soluble and described two alkylene glycol is below the 21 weight % with respect to ink composition.

8, as each described ink composition for ink-jet recording in the claim 1～7, wherein, contain the alkanediol of the slightly water-soluble of 1～3 weight % with respect to ink composition.

9,, wherein, contain described water miscible 1,2-alkanediol of 0.5～3.0 weight % with respect to ink composition as each described ink composition for ink-jet recording in the claim 1～8.

10,, wherein, contain the described two alkylene glycol of 3～18 weight % with respect to ink composition as each described ink composition for ink-jet recording in the claim 1～9.

11, as each described ink composition for ink-jet recording in the claim 1～10, wherein, the alkanediol of described slightly water-soluble is 1,2-ethohexadiol.

12, as each described ink composition for ink-jet recording in the claim 1～11, wherein, described water miscible 1,2-alkanediol is from by 1,2-hexylene glycol, 4-methyl, 1,2-pentanediol and 3, select in the group that 3-dimethyl-1,2-butyleneglycol constitutes more than a kind or 2 kinds.

13, as each described ink composition for ink-jet recording in the claim 1～12, wherein, described two alkylene glycol are dipropylene glycol.

14,, wherein, contain the described tensio-active agent of 0.01～1.0 weight % with respect to ink composition as each described ink composition for ink-jet recording in the claim 1～13.

15, ink composition for ink-jet recording as claimed in claim 14, wherein, described tensio-active agent is the poly organo siloxane tensio-active agent.

16, ink composition for ink-jet recording as claimed in claim 15, wherein, the compound of one or two or more kinds that described organopolysiloxane contains that following formula represents,

In the formula, R represents hydrogen atom or methyl, and a represents 2～11 integer, and m represents 2～50 integer, and n represents 1～5 integer.

17, ink composition for ink-jet recording as claimed in claim 15, wherein, the compound of one or two or more kinds that described organopolysiloxane contains that following formula represents,

In the formula, R represents hydrogen atom or methyl, and a represents 2～13 integer, and m represents 2～50 integer, and n represents 1～5 integer.

18, ink composition for ink-jet recording as claimed in claim 15, wherein, the compound of one or two or more kinds that described organopolysiloxane contains that following formula represents,

In the formula, R represents hydrogen atom or methyl, and a represents 2～13 integer, and m represents 2～50 integer, and n represents 1～8 integer.

19, ink composition for ink-jet recording as claimed in claim 16, wherein, described organopolysiloxane contains one or two or more kinds compound that following formula is represented,

In the formula, R represents methyl, and a represents 6～18 integer, and m is 0, and n is 1.

20, as each described ink composition for ink-jet recording in the claim 1～19, wherein, described coloured material contains pigment and can make the dispersion agent of this colo(u)rant dispersion in black liquid.

21, ink composition for ink-jet recording as claimed in claim 20, wherein, described dispersion agent contains at least a kind of resin that is selected from vinylbenzene-acrylic acid or the like copolymer resins, polyurethanes resin and the fluorenes resinoid.

22, ink composition for ink-jet recording as claimed in claim 21 wherein, contains the described dispersion agent of 1.0～6.0 weight % with respect to ink composition.

23, a kind of ink jet recording method, it is the drop of ejection ink composition and makes described drop be attached to the ink jet recording method that recording medium prints, wherein, described method is used each described ink composition for ink-jet recording in the claim 1～22.

24, method as claimed in claim 23, wherein, described recording medium is the recording medium of selecting from the group that is made of the synthetic paper, printed book paper and the resin film that are main raw material with synthetic resins.

25, method as claimed in claim 24, wherein, described recording medium is a resin film.

26, a kind of record thing, it forms by each described ink jet recording method record in the claim 23～25.