JP2000247015A - Inkjet recording sheet - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide an ink jet recording sheet which is excellent in recording density, recording image quality and water resistance of a recorded image, and is also excellent in light resistance of an image, particularly a halftone image. An inkjet recording sheet for forming a recorded image using an aqueous ink, wherein the recording sheet contains at least one compound represented by the general formula (1). Embedded image [Wherein, R ₂ represents a hydrogen atom or a methyl group, and X ⁻ represents an organic or inorganic anion. n shows 0 or the integer of 1-10. ]

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 (JP-A-56-148583), and a coating layer having a porous cationic alumina hydrate (JP-A-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 coloring 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-61-1
Although the hindered amines disclosed in Japanese Patent No. 46591 have an effect on the light fastness of an image, they are still insufficient, and at present, satisfactory results have not been obtained particularly in the light fastness of a half tone. And water resistance.

[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 halftone image. Is to do.

[0010]

According to the present invention, there is provided an ink jet recording sheet for forming a recorded image using an aqueous ink, wherein at least one compound represented by the general formula (1) is contained in the sheet. An ink jet recording sheet characterized in that:

[0011]

Embedded image

Wherein R ₂ represents a hydrogen atom or a methyl group, and X ⁻ represents an organic or inorganic anion. n shows 0 or the integer of 1-10. The present invention relates to an ink jet recording sheet wherein n in the general formula (1) is 1 to 3. The present invention relates to an ink jet recording sheet in which X ⁻ in the general formula (1) is a pyrophosphate ion or a metaphosphate ion.

The present invention relates to an ink jet recording sheet wherein R ₂ is a hydrogen atom in the general formula (1). The present invention relates to an ink jet recording sheet in which a sheet has an ink receiving layer, and the ink receiving layer contains at least one compound represented by the general formula (1).

According to the present invention, there is provided an ink jet recording apparatus in which 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 compound represented by the general formula (1). Related to the seat. The present invention relates to an ink jet recording sheet in which at least one of the compounds represented by the general formula (1) is contained in at least one layer other than the surface layer of the ink receiving layer.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION The present inventors have found that in an ink jet recording sheet for forming a recorded image using an aqueous ink, a hindered amine, particularly a compound represented by the following general formula (1), is contained in the sheet. It has been found that by including at least one kind, an ink jet recording sheet having excellent image quality, less discoloration due to halftone black and magenta light, and significantly improved image light fastness and water fastness can be obtained. The invention has been completed.

[0016]

Embedded image

Wherein R ₂ represents a hydrogen atom or a methyl group, and X ⁻ represents an organic or inorganic anion. n shows 0 or the integer of 1-10. In the general formula (1), X ⁻ represents an organic or inorganic anion, and specific examples thereof include, for example, chloride ion, bromine ion, iodine ion, phosphate ion, pyrophosphate ion,
Metaphosphate ion, acetate ion, sulfate ion, nitrate ion, benzoate ion, p-toluenesulfonic acid ion,
Oxalate ion, tartrate ion, sulfosalicylic acid ion and the like can be mentioned. Above all, in the case of pyrophosphate ions and metaphosphate ions, even when exposed to light for a long time, the change in the color tone of the halftone black is small, so the deterioration of the image is small and, furthermore, the water resistance is also effective. Particularly preferably used.

Further, when R ₂ is a hydrogen atom in the general formula (1), an ink jet recording sheet having more excellent light resistance can be obtained.

The reason why the light fastness of an image is greatly improved is not clear, but the compound represented by the general formula (1) has a high hydrophilicity, is readily mixed with an aqueous ink, and has a cationic property. It is thought that the presence of an anionic dye is possible due to the electrostatic interaction, and that it functions particularly efficiently and suppresses the decomposition of the dye.

The content of the compound represented by the general formula (1) in the ink jet recording sheet is 0.1 to 0.1.
4g / m ² approximately, and preferably from 0.2 to 2 g / m ² approximately. Incidentally, if the amount is less than 0.1 g / m ² , the effect of improving light resistance becomes insufficient, and if it is more than 4 g / m ² , the image quality deteriorates, which is not preferable.

The effects of the compound represented by the general formula (1) are as follows: n = 1 to 1 in the general formula (1) when viewed comprehensively, such as discoloration due to light resistance of halftone black, image quality, and water resistance. 10
Compounds represented by the formula (1), in particular, n = 1 to 3 show more excellent effects than compounds represented by the formula (n = 0). Also, n
When the value exceeds 10, the compound (1) is localized in the recording sheet, and the effect of light resistance tends to decrease.

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

The method for preparing an ink jet recording sheet containing the specific compound represented by the general formula (1) includes the following.
For example, a method of applying or impregnating a base paper with a coating liquid containing a specific compound by a size press or the like in a paper making process, mixing an ink-absorbing pigment, an adhesive, a specific compound, and further, if necessary, a cationic polymer. A method of applying the obtained ink-receiving layer coating liquid to a support such as high-quality paper (acid paper, neutral paper), synthetic paper, film, or nonwoven fabric using a coating machine and drying to form an ink-receiving layer; Examples include a method of applying a coating liquid containing a specific compound on a pigment, an adhesive, and, if necessary, an ink receiving layer made of a cationic polymer.

Above all, the method of incorporating the above specific compound into the ink receiving layer does not impair other qualities,
It is preferable because the effect is exhibited by improving the light fastness of the image. Furthermore, a method in which two or more ink receiving layers are provided and at least one of them, particularly at least one of the layers excluding the surface layer, contains a specific compound is more preferable in terms of image quality and ink absorbability. When the surface layer contains the compound represented by the general formula (1), the image quality may be degraded due to the interaction with the ink or the pigment.

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.

Of these, amorphous silica, alumina and alumina hydrates, especially amorphous silica, are preferably used because of their excellent ink absorbency.

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 to exhibit a cationic property. Among them, a polymer having a quaternary ammonium group in the main chain or side chain is preferable. Examples of such cationic polymers include dimethyldiallylammonium salt polymer, epichlorohydrin / dimethylamine polymer, polyamide polyamine epichlorohydrin polymer, ethyleneiminate polymer, and polyethyleneimine quaternary ammonium salt polymer. Product, acrylamide / diallyldimethylammonium chloride copolymer, (di) alkylaminoalkyl (meth) acrylate polymer, (meth) acryloyloxyalkyltrialkylammonium salt polymer, (meth) acrylamidoalkyltrialkylammonium salt polymer Products, (meth) acrylic (di) alkylaminoalkylamido acid salt polymer, polyalkylene polyamine dicyandiamide ammonium salt condensate, and the like. These may be used alone or in combination of two or more.

The content of the cationic polymer is usually 0.1.
It is adjusted in the range of 1 to 5 g / m ^2, preferably 0.2 to 3 g / m ² .

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 about 3 to 120 parts by weight, preferably 5 to 50 parts by weight, per 100 parts by weight of the pigment.
Used in the range of about 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 the ink receiving layer is formed, it is of course possible to impart a smooth surface through the roll nip under pressure by using, for example, a super calender or a gloss calender.

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, and polyhydric alcohols such as triethylene glycol monomethyl ether and triethylene glycol monoethyl ether. And lower alkyl ethers of alcohols.

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.

[0037]

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 coating liquid A for ink receiving layer) 100 parts of synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda)
Silicon-modified polyvinyl alcohol (trade name: R113
0, Kuraray) 30 parts, cationic polymer (trade name:
PAS-J-81, manufactured by Nitto Bo) 10 parts and a 10% aqueous solution of a hydrochloride of the following compound 1 (60 parts), a small amount of an antifoaming agent, a dispersant and water, and a coating solution for an ink receiving layer having a solid content of 15%. A 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.

[0039]

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Examples 2 to 7 An ink jet recording sheet was prepared in the same manner as in Example 1 except that the following compound was used instead of the hydrochloride of Compound 1. Example 2: Acetate of Compound 1 Example 3: Phosphate of Compound 1 Example 4: Pyrophosphate of Compound 1 Example 5: Metaphosphate of Compound 1 Example 6: Tartrate of Compound 1 Example 7: Sulfosalicylic acid salt of compound 1

Example 8 An ink jet recording sheet was prepared in the same manner as in Example 1, except that the hydrochloride of the following compound 2 was used instead of the hydrochloride of the compound 1.

[0042]

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Examples 9 to 10 An ink jet recording sheet was prepared in the same manner as in Example 8, except that the following compound was used instead of the hydrochloride of Compound 2. Example 9: Phosphate of Compound 2 Example 10: Pyrophosphate of Compound 2

Example 11 An ink jet recording sheet was prepared in the same manner as in Example 1 except that the hydrochloride of the following compound 3 was used instead of the hydrochloride of the compound 1.

[0045]

Embedded image n = 1 to 3, average molecular weight about 1900

Examples 12 to 16 Ink jet recording sheets were prepared in the same manner as in Example 11, except that the following compound was used in place of the hydrochloride of Compound 3. Example 12: acetate salt of compound 3 Example 13: phosphate salt of compound 3 Example 14: pyrophosphate salt of compound 3 Example 15: metaphosphate salt of compound 3 Example 16: tartrate salt of compound 3

Example 17 An ink jet recording sheet was prepared in the same manner as in Example 11, except that the hydrochloride of the following compound 4 was used instead of the hydrochloride of the compound 3.

[0048]

Embedded image n = 1-3, average molecular weight about 2000

Examples 18 to 19 An ink jet recording sheet was prepared in the same manner as in Example 17 except that the following compound was used instead of the hydrochloride of Compound 4. Example 18: Phosphate of Compound 4 Example 19: Pyrophosphate of Compound 4 Example 20 (Preparation of coating liquid B for ink receiving layer) Synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda) ) 100 parts,
Silicon-modified polyvinyl alcohol (trade name: R113
0, Kuraray) 30 parts, cationic polymer (trade name:
PAS-J-81, manufactured by Nitto Bo) 5 parts and a 10% aqueous solution of a 10% pyrophosphate of compound 1, a small amount of an antifoaming agent, a dispersant and water, and a coating solution for an ink receiving layer having a solid content concentration of 15%. B was obtained.

(Preparation of coating liquid C for ink receiving layer) 100 parts of synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda), 30 parts of silicon-modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray), 10 parts of cationic polymer (trade name: PAS-J-81, manufactured by Nitto Bo), solid content concentration of 15% composed of a small amount of defoamer, dispersant and water
To obtain a coating liquid C for an ink receiving layer.

(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 C 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 21 (Preparation of coating liquid D for ink receiving layer) 100 parts of synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda)
Silicon-modified polyvinyl alcohol (trade name: R113
0, Kuraray) 30 parts, cationic polymer (trade name:
PAS-J-81, manufactured by Nitto Boseki Co., Ltd.) (5 parts), a coating liquid D for an ink receiving layer having a solid content concentration of 15%, comprising a small amount of an antifoaming agent, a dispersant and water.

(Preparation of coating liquid E for ink receiving layer) 100 parts of synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda), 30 parts of silicon-modified polyvinyl alcohol (trade name: R1130, manufactured by Kuraray), 10 parts of a cationic polymer (trade name: PAS-J-81, manufactured by Nitto Bo) and 150 parts of a 10% aqueous solution of a pyrophosphate of compound 1; a small amount of 15% solid content consisting of a small amount of an antifoaming agent, a dispersant, and water
To obtain a coating liquid E for an ink receiving layer.

(Preparation of Ink-Jet Recording Sheet) 6
The coating liquid D for an ink receiving layer was applied on a high quality paper of 5 g / m ^{2 by} a wire bar to a solid content of 10 g / m ² and dried to form a first ink receiving layer. The coating liquid E was applied with a wire bar to a solid content of 5 g / m ² and dried to form a second ink receiving layer, and then subjected to a super calender treatment to prepare an ink jet recording sheet.

Example 22 (Preparation of coating liquid F for ink receiving layer) 100 parts of synthetic amorphous silica (trade name: Fine Seal X45, manufactured by Tokuyama Soda)
Silicon-modified polyvinyl alcohol (trade name: R113
0, Kuraray) 30 parts, cationic polymer (trade name:
PAS-J-81, manufactured by Nitto Bo) 5 parts and 50 parts of a 10% aqueous solution of a pyrophosphate of Compound 1, a small amount of an antifoaming agent, a dispersant and water, and a coating for an ink receiving layer having a solid concentration of 15%. Liquid D 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 F for the ink-receiving layer in solid content quality paper of 5 g / m ^2, further, the ink-receiving layer The coating liquid F 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 23 Example 2 was repeated except that the pyrophosphate of compound 3 was used in place of the pyrophosphate of compound 1.
In the same manner as in Example No. 0, an ink jet recording sheet was prepared.

Example 24 Example 2 was repeated, except that the pyrophosphate of compound 3 was used in place of the pyrophosphate of compound 1.
In the same manner as in Example 1, an ink jet recording sheet was prepared.

Example 25 Example 2 was repeated except that the pyrophosphate of compound 3 was used in place of the pyrophosphate of compound 1.
In the same manner as in Example 2, an ink jet recording sheet was prepared.

Examples 26 to 27 An ink jet recording sheet was prepared in the same manner as in Example 20, except that the following compound was used in place of the pyrophosphate of Compound 1. Example 26: Metaphosphate of Compound 1 Example 27: Hydrochloride of Compound 1 Examples 28 to 29 In Example 23, the following compounds were used in place of the pyrophosphate of compound 3 in Example 23. In the same manner as in No. 23, an ink jet recording sheet was prepared. Example 28: Metaphosphate of Compound 3 Example 29: Hydrochloride of Compound 3

Comparative Example 1 An ink jet recording sheet was prepared in the same manner as in Example 1 except that the hydrochloride of Compound 1 was not used.

Comparative Example 2 An ink jet recording sheet was prepared in the same manner as in Example 1, except that an acetate of the following compound 5 was used instead of the hydrochloride of the compound 1.

[0063]

Embedded image

Comparative Example 3 An ink jet recording sheet was prepared in the same manner as in Example 1, except that an acetate of the following compound 6 was used instead of the hydrochloride of the compound 1.

[0065]

Embedded image

Comparative Example 4 An ink jet recording sheet was prepared in the same manner as in Example 1, except that an acetate of the following compound 7 was used instead of the hydrochloride of the compound 1.

[0067]

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The following evaluations were performed on the ink jet recording sheets obtained in Examples and Comparative Examples.
It was shown to. [Evaluation by Halftone Image Lightfastness-Solid Printing] Using an inkjet printer (trade name: PM-700C, manufactured by Seiko Epson) as an inkjet recording sheet,
Solid printing with halftone dots of 50% was performed using mixed black and magenta inks of a mixed color of cyan, magenta and yellow. The obtained image was obtained using a light source: xenon, 63 ° C., 40
Weather meter set to the condition of% RH (model name: SU
NSHINE XENON LONG LIFE WEATHERMETER (manufactured by Suga Test Instruments) for 100 hours, the density before and 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

A colorimeter (type: CR-321,
Minolta), L before and after irradiation ^*a^*b^*Measure
Was. Table 1 shows that after irradiation for mixed black, a^*
showed that. Note that a^*The green color is stronger the larger the-
Therefore, the closer to 0, the better. [Lightfastness-Evaluation by image] Inkjet printer
(Product name: PM-700C, manufactured by Seiko Epson)
And an ISO-400 image (“High-definition color digital
Standard image data ISO / JIS-SCID ”, p1
3. Image name: Portrait, from Japan Planning Association
Line) was printed. The obtained image was analyzed using a light source: xenon, 6
Weather meter set to 3 ° C, 40% RH
(Model name: SUNSHINE XENON LONG LIFE WEATHERMETE
R, manufactured by Suga Test Machine Co., Ltd.) for 20 hours.
The light level was observed and evaluated.

○: Almost no discoloration was observed. Δ: Despite fading and fading, color balance is not broken and there is almost no problem in practical use. X: Remarkable fading and practical problem. [Image quality] Visual observation of printed image. And the image quality was evaluated.

◎: Very good ：: Excellent や: Somewhat poor, but no practical problem ×: Very poor, practical problem

[Waterfastness] After one drop of water was dropped on the image after printing, it was wiped off one minute later, and the waterfastness was visually observed. ：: Discoloration and discoloration and bleeding are not observed at all. △: Discoloration and discoloration and bleeding are slightly observed, but there is no practical problem. X: Discoloration and discoloration and bleeding are remarkable.

[0073]

[Table 1]

[0074]

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

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D21H 27/00 D21H 27/00 Z // C09D 201/00 C09D 201/00 F-term (Reference) 2H086 BA37 BA38 4D075 AC14 AC22 AC25 AC53 AC60 CA35 CA38 CB01 DB18 DC27 EA06 EA33 4J038 DN012 EA011 GA08 HA216 HA266 HA366 HA456 HA526 HA536 NA03 NA04 PB11 PC10 4L055 AG18 AG35 AG64 AG82 AG88 AH02 AH25 AH37 AH50 AJ09 BE09 FA09

Claims (7)

[Claims] 1. An ink jet recording sheet for forming a recorded image using an aqueous ink, wherein the recording sheet contains at least one compound represented by the general formula (1). Recording sheet. Embedded image [Wherein, R ₂ represents a hydrogen atom or a methyl group, and X ⁻ represents an organic or inorganic anion. n shows 0 or the integer of 1-10. ] 2. The ink jet recording sheet according to claim 1, wherein n in the general formula (1) is an integer of 1 to 3. 3. The ink jet recording sheet according to claim 1, wherein in the general formula (1), X ⁻ is a pyrophosphate ion or a metaphosphate ion. 4. The ink-jet recording sheet according to claim 1, wherein R ₂ is a hydrogen atom in the general formula (1). 5. The recording sheet having an ink receiving layer, wherein the ink receiving layer contains at least one compound represented by the general formula (1). The sheet for inkjet recording according to the above. 6. The ink receiving layer according to claim 5, wherein 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 compound represented by the general formula (1). Sheet for inkjet recording. 7. The ink jet recording sheet according to claim 6, wherein at least one layer other than the surface layer of the ink receiving layer contains at least one compound represented by the general formula (1).