JP2002160447A - Ink jet recording sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording sheet, which is excellent in recording density, recording image quality and the water resistance of a recording image and, in addition, excellent also in the light resistance of an image, especially of a full color image. SOLUTION: In the ink jet recording sheet, in which an image is formed by employing at least one kind of phthalocyanine dyes as a cyan dye and, at the same time, by employing at least one kind of azo dyes in a magenta dye and/or a black dye, a phenolic compound, the solubility of which in water at 25 deg.C is 1 wt.% or less and the ortho position of a hydroxyl group of which has no substituent, is included.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording sheet for forming a recorded image using an aqueous ink, and more particularly to an ink jet recording sheet excellent in light resistance of a recorded image.

[0002]

2. Description of the Related Art Ink-jet recording is easy to achieve multi-color recording, has low noise, has a relatively high recording speed,
It has advantages such as being able to record on a large area, and is currently widely used in various fields such as various printers, facsimile machines and computer terminals, and is rapidly spreading. In the ink jet method using water-based ink, with the improvement of printer performance such as printing speed, resolution, gradation, etc., high-speed absorption of ink, high density, high image quality, Water resistance and also light resistance of images are required.

[0003] In order to respond to such demands, there have been many proposals regarding sheets provided with an ink receiving layer mainly composed of a pigment and an adhesive on a support. For example, a coating layer composed of amorphous silica and a polymer binder (JP-A-55-51583, JP-A-57-157786 and JP-A-62-158084), and a coating layer having an ink-adsorbing pigment such as zeolite ( JP-A-56-14417
No. 2), a coating layer composed of finely divided silicic acid and a water-soluble resin (Japanese Patent Application Laid-Open No. 56-148583), and a coating layer having a porous cationic alumina hydrate (Japanese Patent Application Laid-Open No. Sho 60-2).
No. 32990) is provided on a support.

[0004] Among them, amorphous silica is a pigment most suitable for ink jet recording because it has a high ink absorption speed, a large ink absorption capacity, can print with high image quality, and does not impair the coloring of the dye. It is believed that. However, while the ink-receiving layer containing amorphous silica as a main component makes the color development of the dye clear, it has the disadvantage that it promotes the decomposition of the dye by light and the recorded image is easily discolored or faded with time.

Further, from the viewpoint of improving the water resistance of printing, polycationic polymer electrolytes (JP-A-56-89992, JP-A-60-49990, and JP-A-61-125878).
Japanese Patent Application Laid-Open No. 57-36692), basic latex
Has been proposed in the ink receiving layer. However, although the use of such a water resistance improver improves the water resistance of the print, it causes a problem that photodecomposition of the dye is accelerated and light resistance is reduced.

On the other hand, a general method for improving the light fastness of an image is to improve the light fastness of the ink. However, the ink used for ink jet recording does not cause clogging of the nozzles and has a vivid color. Having a color tone,
Since heat stability is an essential condition, it is not always possible to select a dye or pigment having excellent light fastness, and at present, the light fastness of magenta ink is particularly insufficient.

As a method for improving the light fastness of an image from the surface of an ink jet recording sheet, at least one of a metal oxide such as phosphotungstic acid, phosphomolybdic acid, chromic dichloride, a metal chloride or tannic acid is used. (JP-A-57-87987),
A method of adding an antioxidant such as a hindered phenol (JP-A-57-74192), a method of adding a hindered amine (JP-A-61-146591), benzophenone-based, benzotriazole-based or phenylsalicylic acid A method of adding an ultraviolet absorber such as a system (Japanese Patent Application Laid-Open Nos. 57-74193 and 57-87988,
63-222885) and the like have been proposed.

Among these additives, JP-A-57-7
The hindered phenols disclosed in Japanese Patent No. 4192 are
Although it has an effect on the light fastness of the image, it is still insufficient,
In particular, at present, satisfactory results have not been obtained in the light fastness of full-color images such as portrait images, and furthermore, the image quality and recording density are adversely affected.

[0009]

SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording sheet which is excellent in recording density, recording quality and water resistance of a recorded image, and is also excellent in light resistance of an image, especially a full-color image. It is in.

[0010]

According to the present invention, there is provided an ink-jet printer which forms an image using at least one phthalocyanine dye as a cyan dye and at least one azo dye in a magenta dye and / or a black dye. In the recording sheet, the solubility in water at 25 ° C. is 1 wt% in the ink jet recording sheet.
An ink jet recording sheet comprising a phenol compound having no substituent at the ortho-position of the hydroxyl group. The present invention relates to an ink jet recording sheet wherein the phenol compound is at least one selected from general formulas (1) and (2).

Embedded image [In the formula, R ₁ represents a hydrogen atom, a C ₁ -C ₆ alkyl group, a phenyl group, a p-hydroxyphenyl group or a C ₁ -C ₆ alkoxycarbonyl group, and R ₂ represents a hydrogen atom or a methyl group. ]

Embedded image Wherein R ₃ and R ₅ are a hydrogen atom, a C ₁ -C ₆ alkyl group,
Phenyl group, p-hydroxyphenyl group or C ₁ -C ₆
And R ₄ and R ₆ represent a hydrogen atom or a methyl group. The present invention relates to a phenol compound in which the ink jet recording sheet has an ink receiving layer and does not have a substituent at the ortho-position of the hydroxyl group, and in particular, at least one of the compounds represented by the general formulas (1) and (2). Is contained in the ink receiving layer.
In the present invention, the ink receiving layer has a multilayer structure of two or more layers,
Ink jet recording wherein at least one of the multilayer structures contains at least one phenolic compound having no substituent at the ortho-position of the hydroxyl group, particularly at least one compound represented by the general formulas (1) and (2). Pertaining to a sheet for use. The present invention has at least one phenolic compound having no substituent at the ortho-position of the hydroxyl group in at least one layer other than the surface layer of the ink receiving layer,
In particular, the present invention relates to an ink jet recording sheet containing at least one of the compounds represented by formulas (1) and (2).

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have proposed an ink jet recording sheet for forming a recorded image using an aqueous ink, wherein the sheet has a solubility in water at 25 ° C. of 1 wt% or less and an ortho group of a hydroxyl group. Phenolic compound having no substituent at the position, especially the following general formula (1)
By containing at least one of the compounds represented by (2) and (3), an ink jet recording sheet excellent in recording density, recording quality and water resistance of a recorded image, and also excellent in light resistance of an image, particularly a full-color image, can be obtained. The inventors have found that the present invention can be obtained, and have completed the present invention.

[0012]

Embedded image

[In the formula, R ₁ represents a hydrogen atom, a C ₁ -C ₆ alkyl group, a phenyl group, a p-hydroxyphenyl group or a C ₁ -C ₆ alkoxycarbonyl group, and R 2 represents a hydrogen atom or a methyl group. . ]

[0014]

Embedded image

Wherein R ₃ and R ₅ are a hydrogen atom, a C ₁ -C ₆ alkyl group, a phenyl group, a p-hydroxyphenyl group or a C ₁ -C ₆ alkoxycarbonyl group, and R ₄ and R ₆ are Shows a hydrogen atom or a methyl group. As specific examples of the general formula (1), for example, dihydroxydiphenylmethane, 1,1-bis (4-hydroxyphenyl) ethane, 1,1-bis (4-hydroxyphenyl) -1-phenylmethane, 1,1 -Bis (4-hydroxyphenyl) -1- (4-hydroxyphenyl) methane, methyl bis (4-hydroxyphenyl) acetate, n-butyl bis (4-hydroxyphenyl) acetate, 2,2
-Bis (4-hydroxyphenyl) propane, 2,2-
Bis (4-hydroxyphenyl) -2-ethylpropane, 2,2-bis (4-hydroxyphenyl) -4-methylpentane, 2,2-bis (4-hydroxyphenyl) -n-heptane, 2,2- Bis (4-hydroxyphenyl) -2-phenylpropane, 2,2-bis (4-
(Hydroxyphenyl) -2- (4-hydroxyphenyl) propane and the like. Further, specific examples of the general formula (2) include, for example, 1,3-bis (4-hydroxybenzyl) benzene, 1,4-bis (4-hydroxybenzyl) benzene, 1,3-bis [α- ( 4-hydroxyphenyl) ethyl] benzene, 1,4-bis- [α-
(4-hydroxyphenyl) ethyl] benzene, 1,3
-Bis- [α-methyl-α- (4-hydroxyphenyl) ethyl] benzene, 1,4-bis- [α-methyl-
α- (4-hydroxyphenyl) ethyl] benzene, 1
-[Α-methyl-α- (4-hydroxyphenyl) ethyl] -4- [α, α-methyl-α- (4-hydroxyphenyl) ethyl] benzene and the like. Among these, 2,2-bis (4-hydroxyphenyl) propane and 2,2-bis (4-hydroxyphenyl) -2-
In the case where phenylpropane and 1,3-bis [α- (4-hydroxyphenyl) ethyl] benzene are used, even when exposed to light for a long time, the deterioration of the portrait image is reduced because the halftone black is less faded. It is small and is particularly preferably used.

Regarding the light deterioration mechanism of an image, generally,
The following mechanism is considered. One is that the dye itself is irradiated with light, and the electrons in the excited state move to triplet oxygen to act as a sensitizer for generating singlet oxygen radicals (sensitizing action), and the resulting strong The dye itself is oxidized by a singlet oxygen radical of an oxidizing agent, and the second is a phenomenon (catalysis) in which singlet oxygen generated similarly oxidizes other dyes in the vicinity. In particular, when the phthalocyanine dye and the azo dye are close to or mixed with each other, the latter action promotes the oxidative decomposition of the azo dye and accelerates the photodegradation of the image.

Although the reason why the light fastness of an image is greatly improved is not clear, the compounds represented by the general formulas (1) and (2) capture radicals generated by light irradiation of the dye to form a singlet. This is probably because the generation of oxygen is suppressed or the dye itself has an effect of suppressing the oxidative decomposition of the dye by combining with the generated singlet oxygen. As a result, in particular, when at least one phthalocyanine dye is used as a cyan dye and at least one azo dye is used as a magenta dye and / or a black dye, a particularly high effect is obtained on light fastness of an image.

Formulas (1) and (2)
As the content of the compound in the inkjet recording sheet
Is 0.1 to 4 g / m^Two Degree, preferably 0.2 to 2 g
/ M ^Two It is about. By the way, 0.1 g / m^Two Fewer
And the effect of improving light resistance becomes insufficient, and 4 g / m^Two Than
If the amount is too large, the image quality deteriorates, which is not preferable.

In the ink jet recording sheet, a general thioether-based, phosphorus-based antioxidant, a benzotriazole-based, benzophenone-based ultraviolet absorber, a singlet, etc. are used as long as the effects of the present invention are not impaired. It is also possible to add an oxygen quencher or the like.

A coating liquid containing these specific compounds is generally prepared by dispersing fine particles into fine particles using a stirring / pulverizing machine such as a ball mill, an attritor, a sand mill and a colloid mill using water as a dispersion medium.

In such a coating solution, starch, hydroxyethylcellulose, methylcellulose, carboxymethylcellulose, gelatin, casein, gum arabic, polyvinyl alcohol, styrene / maleic anhydride copolymer salt, styrene / acrylic acid copolymer are usually used as binders. A combined salt, a styrene / butadiene copolymer emulsion or the like is used in an amount of 2 to 40% by weight, preferably about 5 to 25% by weight of the total solid. Of course, two or more of these binders can be used in combination.

Examples of a method for preparing an ink jet recording sheet include a method of applying a coating liquid containing a specific compound to base paper by a size press or the like in a paper making process, a method of coating an ink-absorbing pigment, an adhesive, and a coating containing a specific compound. Liquid, and, if necessary, a coating liquid for an ink receiving layer obtained by mixing a cationic polymer with a high-quality paper (acid paper, neutral paper), synthetic paper,
A method in which an ink receiving layer is formed by applying and drying a support such as a film or a nonwoven fabric using a coating machine and the like.

Among them, at least one kind of phenol compound having no substituent at the ortho-position of the specific hydroxyl group in the ink receiving layer, especially at least one kind of compound represented by the general formulas (1) and (2), is used. The method of containing is preferable because the effect can be exhibited by improving the light resistance of an image without impairing other quality.

Further, two or more ink-receiving layers are provided, and at least one layer thereof, particularly at least one layer except the surface layer, has at least one phenol compound having no substituent at the ortho-position of a specific hydroxyl group, particularly The method of containing at least one of the compounds represented by the general formulas (1) and (2) is more preferable in terms of image quality and ink absorbency.

As the support of the ink jet recording paper, paper (acid paper, neutral paper), synthetic paper, plastic film, nonwoven fabric or plastic film bonded to coated paper or woodfree paper via an adhesive, Alternatively, a material obtained by laminating plastic on paper is used. Examples of such a plastic film include films of polyester, polypropylene, nylon and the like.

Examples of the pigment to be contained in the ink receiving layer include zeolite, light calcium carbonate, heavy calcium carbonate, magnesium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium oxide, zinc oxide,
Zinc sulfide, zinc carbonate, satin white, aluminum silicate, diatomaceous earth, calcium silicate, magnesium silicate, amorphous silica, aluminum hydroxide, alumina,
Examples include alumina hydrate, lithopone, and urea-formalin resin filler. These may be used alone or in combination of two or more.

Among these, amorphous silica, alumina and alumina hydrate are preferably used because of their excellent ink absorbability.

The amount of the pigment used in the ink receiving layer is as follows.
About 20 to 90% by weight based on the solid content of the ink receiving layer,
Preferably, it is about 30 to 80% by weight. If the content exceeds 90% by weight, the coating strength of the ink receiving layer decreases, and if the content is less than 20% by weight, the ink absorbency decreases, the ink drying property after recording becomes insufficient, and the image quality may deteriorate. is there.

In the present invention, a cationic polymer can be used for the purpose of improving the water resistance of a recorded image. Such a cationic polymer can be used as long as it dissociates when dissolved or emulsified in water and exhibits cationicity. Examples of such a cationic polymer include polydiallylamine hydrochloride, diallylamine hydrochloride / acrylamide copolymer, diallylamine hydrochloride / sulfur dioxide copolymer, polydiallyldimethylammonium chloride, diallyldimethylammonium chloride / acrylamide copolymer, Diallyldimethylammonium chloride / sulfur dioxide copolymer, polyallylamine hydrochloride, allylamine hydrochloride / diallylamine hydrochloride copolymer, N-vinylacrylamidine hydrochloride / acrylamide copolymer, epichlorohydrin / dialkylamine addition polymer , Polyamide polyamine epichlorohydrin polymer, dicyandiamide / formalin polycondensate, dicyandiamide / polyethyleneamine polycondensate, polyethyleneimine hydrochloride, Li (meth) acryloyloxyalkyldialkylamine hydrochloride, (meth) acryloyloxyalkyldialkylamine hydrochloride / acrylamide copolymer, poly (meth) acryloyloxyalkyltrialkylammonium chloride, (meth) acryloyloxyalkyltrialkylammonium chloride・ Acrylamide copolymer, poly (meth) acrylamidoalkyldialkylamine hydrochloride, (meth) acrylamidoalkyldialkylamine hydrochloride ・ Acrylamide copolymer, poly (meth) acrylamidoalkyltrialkylammonium chloride, (meth) acrylamidoalkyltrialkyl Ammonium chloride / acrylamide copolymer and the like. These may be used alone or in combination of two or more.

The content of the cationic polymer is generally adjusted in the range of 1 to 100 parts by weight, preferably 5 to 50 parts by weight, per 100 parts by weight of the pigment. If the compounding amount is small, it is difficult to obtain the effect of improving printing water resistance, printing density, etc.,
On the other hand, if the amount is too large, the print density tends to decrease, and image bleeding tends to occur.

In the ink receiving layer, adhesives such as starch derivatives such as oxidized starch and etherified starch, cellulose derivatives such as carboxymethylcellulose and hydroxyethylcellulose, casein, gelatin, soy protein,
Complete (partial) saponified polyvinyl alcohol, silicon-modified polyvinyl alcohol, acetoacetyl group-modified polyvinyl alcohol, styrene-maleic anhydride copolymer salt, styrene-butadiene latex, acrylic latex, polyester polyurethane latex, vinyl acetate An aqueous adhesive such as latex or an organic solvent-soluble resin such as polymethyl methacrylate, a polyurethane resin, an unsaturated polyester resin, a vinyl chloride-vinyl acetate copolymer, polyvinyl butyral, and an alkyd resin is used alone or in combination of two or more. These adhesives are generally used in an amount of 1 to 20 parts by weight based on 100 parts by weight of the pigment.
It is used in an amount of about 0 parts by weight, preferably about 10 to 100 parts by weight.

Further, in the ink receiving layer, a pigment dispersant,
Thickeners, crosslinkers, fluidity modifiers, defoamers, defoamers, release agents, foaming agents, penetrants, coloring dyes, coloring pigments, fluorescent brighteners, preservatives, anti-foaming agents, waterproofing Agents and the like can be appropriately added.

The ink receiving layer is prepared by applying a coating solution for the ink receiving layer to a bar coater, blade coater, air knife coater, or the like.
It is formed by applying and drying a coating method such as a gravure coater, a die coater, and a curtain coater on at least one surface of the support so that the coated amount after drying is about ² to 30 g / m ² . Incidentally, if the coating amount is less than 2 g / m ² , the recorded image quality is reduced, and if it is more than 30 g / m ² , the strength of the coating film may be reduced.

After forming the ink receiving layer, it is also possible to impart a smooth surface to the roll nip under pressure by using, for example, a super calender or a gloss calender for the purpose of imparting high gloss.

Further, an ink-jet recording sheet having a higher surface gloss can be obtained by providing a gloss developing layer on the ink receiving layer and performing a casting treatment, or by directly casting the ink receiving layer. Casting methods include a wet method, a gelling method, and a rewet method. In the wet method, while the glossy layer coated on the base paper is in a wet state, the glossy layer is pressed against the heated mirror drum surface to perform a high gloss finish. In the gelling method, while the glossy layer coated on the base paper is in a wet state, the glossy layer is brought into contact with a gelling agent bath, and the gelled glossy layer is pressed against a heating drum surface. This is to perform high gloss finish. The rewet method is
After the wet glossy layer is once dried and brought into contact with the wetting liquid again, it is pressed against the surface of the heating drum to perform a high gloss finish.

A protective layer may be provided on the back surface of the support,
It is of course possible to provide an intermediate layer between the support and the recording layer, and various known techniques in the field of manufacturing an inkjet recording sheet can be added.

The aqueous ink for forming a recorded image is a recording liquid comprising a colorant, a liquid medium, and other additives. Examples of the coloring agent include various water-soluble dyes such as direct dyes, acid dyes, and reactive dyes. As the liquid medium of the aqueous ink, there is water alone or a combination of water and a water-soluble organic solvent. Examples of the water-soluble organic solvent include monohydric alcohols such as ethyl alcohol and isopropyl alcohol, polyhydric alcohols such as ethylene glycol, diethylene glycol, polyethylene glycol, and glycerin, triethylene glycol monomethyl ether, triethylin, triethylene glycol monomethyl ether, and triethylene. And lower alkyl ethers of polyhydric alcohols such as glycol monoethyl ether. Further, examples of the additives include a pH adjuster, a metal sequestering agent, an anticorrosive, a viscosity adjuster, a surface tension adjuster, a surfactant, and a rust inhibitor.

[0038]

The present invention will be described in more detail with reference to the following Examples, but it should be understood that the present invention is by no means restricted thereto. In the examples, "parts" and "%" indicate parts by weight and% by weight, respectively, unless otherwise specified.

Example 1 (Preparation of phenol compound dispersion) 100 parts of various phenol compounds, methylcellulose (trade name: Metroose 6)
5 parts of OSH-03, manufactured by Shin-Etsu Chemical Co., Ltd., 0.7 part of an antifoaming agent (trade name: Nopco 1407K, manufactured by San Nopco Co.) and water, and a composition having a solid content concentration of 20% was averaged with a ball mill. The dispersion was pulverized until the particle diameter became 0.5 μm to obtain a dispersion.

(Preparation of Coating Solution A for Ink-Receiving Layer) Synthetic amorphous silica (trade name: Fine Seal X60,
100 parts of silicon modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray Co., Ltd.)
250 parts of aqueous solution, cationic polymer (trade name: PAS)
-J-81, manufactured by Nitto Boseki Co., Ltd.) 25% aqueous solution 120
Parts of a 20% dispersion of 1,3-bis- [α-methyl-α- (4-hydroxyphenyl) ethyl] benzene and a small amount of a defoamer, a dispersant and water at a solids concentration of 15%. A coating liquid A for an ink receiving layer was obtained.

(Preparation of Inkjet Recording Sheet) 6
After coating the ink receiving layer coating liquid A on a 5 g / m ² high quality paper with a wire bar so as to have a solid content of 12 g / m ² and drying to provide an ink receiving layer, a super calender treatment is performed to perform ink jet printing. A recording sheet was created.

Examples 2 to 7 In Example 1, 1,3-bis- [α-methyl-α-
An ink jet recording sheet was prepared in the same manner as in Example 1 except that a dispersion of the following compound was used instead of the dispersion of (4-hydroxyphenyl) ethyl] benzene. Example 2: 2,2-bis (4-hydroxyphenyl) propane Example 3: 2,2-bis (4-hydroxyphenyl)-
2-Phenylpropane Example 4: 1,4-bis- [α-methyl-α- (4-hydroxyphenyl) ethyl] benzene Example 5: Bis (4-hydroxyphenyl) acetic acid-n-
Butyl Example 6: 4-hydroxy-4'-isopropoxydiphenylsulfone Example 7: 4,4'-dihydroxydiphenylsulfone

Example 8 (Preparation of Coating Solution B for Ink Receiving Layer) Synthetic amorphous silica (trade name: Fine Seal X60,
100 parts of silicon modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray Co., Ltd.)
250 parts of aqueous solution, cationic polymer (trade name: PAS)
-J-81, manufactured by Nitto Boseki Co., Ltd.) to obtain a coating solution B for an ink receiving layer having a solid content concentration of 15%, comprising 120 parts of a 25% aqueous solution and a small amount of an antifoaming agent, a dispersant and water.

(Preparation of Coating Solution C for Ink Receiving Layer) Synthetic amorphous silica (trade name: Fine Seal X60,
100 parts of silicon modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray Co., Ltd.)
250 parts of aqueous solution, cationic polymer (trade name: PAS)
-J-81, manufactured by Nitto Boseki Co., Ltd.) 25% aqueous solution 120
Of a 20% dispersion of 1,3-bis- [α-methyl-α- (4-hydroxyphenyl) ethyl] benzene and a small amount of a defoamer, a dispersant and water at a solids concentration of 15%. A coating liquid C for an ink receiving layer was obtained.

(Preparation of Inkjet Recording Sheet) 6
After providing the first ink-receiving layer by coating and drying a wire bar such that the 10 g / m ² coating liquid C for the ink receiving layer in solid content quality paper of 5 g / m ^2, further, the ink-receiving layer The coating liquid B was applied and dried with a wire bar so that the solid content was 5 g / m ^2, and the second ink receiving layer was provided. Then, a super calender treatment was performed to prepare an ink jet recording sheet.

Example 9 (Preparation of coating liquid D for ink receiving layer) Synthetic amorphous silica (trade name: Fine Seal X60;
100 parts of silicon modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray Co., Ltd.)
250 parts of aqueous solution, cationic polymer (trade name: PAS)
-J-81, manufactured by Nitto Boseki Co., Ltd.) 25% aqueous solution 120
Parts, 1,20 parts of a 20% dispersion of 1,3-bis- [α-methyl-α- (4-hydroxyphenyl) ethyl] benzene and a small amount of a defoamer, a dispersant and water at a solids concentration of 15%. A coating liquid D for an ink receiving layer was obtained.

(Preparation of Inkjet Recording Sheet) 6
After providing the first ink-receiving layer by coating and drying a wire bar such that the 10 g / m ² coating liquid B for ink-receiving layer in solid content quality paper of 5 g / m ^2, further, the ink-receiving layer The coating liquid D for application was applied and dried with a wire bar so as to have a solid content of 5 g / m ² to provide a second ink receiving layer, and then subjected to a super calender treatment to prepare an ink jet recording sheet.

Example 10 (Preparation of an ink jet recording sheet) A coating liquid C for an ink receiving layer was applied at a solid content of 10 g / m ^{2 on} a high quality paper of 65 g / m ^2.
After coating and drying with a wire bar to provide a first ink receiving layer, the coating liquid D for the ink receiving layer was further applied and dried with a wire bar so that the solid content was 5 g / m ^2. After the second ink receiving layer was provided, a super calender treatment was performed to prepare an ink jet recording sheet.

Comparative Example 1 In Example 1, 1,3-bis- [α-methyl-α-
An ink jet recording sheet was prepared in the same manner as in Example 1 except that the dispersion of (4-hydroxyphenyl) ethyl] benzene was not used.

Comparative Example 2 In Example 1, 1,3-bis- [α-methyl-α-
Instead of (4-hydroxyphenyl) ethyl] benzene, 4,4′-thiobis (6-tert-butyl-m-
Except for using cresol), an ink jet recording sheet was prepared in the same manner as in Example 1.

Comparative Example 3 In Example 1, 1,3-bis- [α-methyl-α-
(4-hydroxyphenyl) ethyl] In the same manner as in Example 1 except that 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butylphenyl) butane was used instead of benzene. An ink jet recording sheet was prepared.

The ink jet recording sheets obtained in Examples and Comparative Examples were evaluated as follows, and the results were shown in Table 1.
It was shown to.

[Image Lightfastness-Evaluation by Solid Printing] Using an Epson inkjet printer PM-800C as an inkjet recording sheet, a Macbeth density of 1.5 was obtained with mixed black and magenta mixed with cyan, magenta, yellow and / or black. (In the case of magenta, a green filter was used). In addition, Epson inkjet printer P
M-800C uses a phthalocyanine dye as a cyan dye and an azo dye as a magenta dye and a black dye. The obtained image was taken with a weather meter (model name: SUNSHINE XENON LONG LIFE WEATH) set under conditions of light source: xenon, 63 ° C., 40% RH.
Irradiation was performed for 72 hours using an ERMETER (manufactured by Suga Test Instruments), and the density after irradiation was measured with a Macbeth densitometer (model: RD-914, manufactured by Macbeth), and the image remaining rate was calculated by the following equation. Image residual rate (%) = [(density after irradiation) / (density before irradiation)] × 100

[Lightfastness—Evaluation by Portrait Image]
Using an Epson inkjet printer PM-800C, an image of ISO-400 (“High-definition color digital standard image data ISO / JIS-SCID”, p1
3. Image name: Portrait, published by Japan Planning Association. The obtained image was analyzed using a light source: xenon, 6
Weather meter set at 3 ゜ C, 40% RH (model name: SUNSHINE XENON LONG LIFE WEATHERMETE
R, manufactured by Suga Test Instruments Co., Ltd.) for 72 hours, and the light resistance level was visually observed and evaluated.

：: Almost no discoloration was observed. Δ: Despite slight discoloration, color balance was not lost, and there was almost no problem in practical use. X: Discoloration was remarkable and there was a practical problem.

[Image Quality] The image after printing was visually observed to evaluate the image quality. ◎: Very good ○: Excellent △: Somewhat poor, but no practical problem ×: Very poor, practical problem

[0057]

[Table 1]

As is evident from Table 1, the ink jet recording sheet of the present invention is a recording sheet which has little discoloration and discoloration of the image even when exposed to light for a long time, and has excellent image quality. .

Claims (5)

[Claims] An ink jet recording sheet for forming an image using at least one phthalocyanine dye as a cyan dye and at least one azo dye in a magenta dye and / or a black dye. An ink jet recording sheet comprising a phenol compound having a solubility in water at 25 ° C. of 1 wt% or less and having no substituent at the ortho-position of a hydroxyl group. 2. The ink jet recording sheet according to claim 1, wherein the phenol compound is at least one selected from the general formulas (1) and (2). Embedded image [In the formula, R ₁ represents a hydrogen atom, a C ₁ -C ₆ alkyl group, a phenyl group, a p-hydroxyphenyl group or a C ₁ -C ₆ alkoxycarbonyl group, and R ₂ represents a hydrogen atom or a methyl group. [Chemical formula 2] Wherein R ₃ and R ₅ are a hydrogen atom, a C ₁ -C ₆ alkyl group,
Phenyl group, p-hydroxyphenyl group or C ₁ -C ₆
And R ₄ and R ₆ represent a hydrogen atom or a methyl group. ] 3. The ink jet recording sheet according to claim 1, wherein the ink jet recording sheet has an ink receiving layer and a phenol compound having no substituent at the ortho-position of the hydroxyl group is contained in the ink receiving layer. Sheet. 4. The ink receiving layer has a multilayer structure of two or more layers, and at least one of the multilayer structures contains at least one phenol compound having no substituent at the ortho-position of the hydroxyl group. The sheet for inkjet recording according to the above. 5. The ink jet recording sheet according to claim 4, wherein at least one layer other than the surface layer of the ink receiving layer contains at least one phenol compound having no substituent at the ortho-position of the hydroxyl group.