JPH11349896A - Treating agent for aqueous-ink acceptor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a treating agent which absorbs an aq. ink at a high speed, hardly allows an aq. ink to ooze, and has an excellent balance between hydrophilicity and water resistance by incorporating, into the same, a high-mol.- wt. polyether polyester which is prepd. by the chain extension of polyethylene glycol with a polybasic acid anhydride and has a specified acid value. SOLUTION: A high-mol.-wt. polyether polyester which is prepd. by the chain extension of polyethylene glycol with a polybasic acid anhydride, pref. a tetracarboxylic anhydride, and has an acid value of 0.8-160, a polyether polyester structure pref. represented by the formula, and a number average mol.wt. of 500-500,000 is incorporated. In the formula, R is a divalent org. residue; Z is a tetravalent org. residue; X and Y are each H, a metal atom, ammonium, or an org. amine group; and n is 1-1,000. Pref., the content of the high-mol.-wt. polyether polyester in terms of solid is 10 wt.% or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a treatment agent for an aqueous ink receiver. More specifically, the present invention relates to a treatment agent for an aqueous ink receptor used for a recording medium for inkjet.

[0002]

2. Description of the Related Art Conventionally, recording media for ink jet printers using water-soluble inks include, for example, polyvinylpyrrolidone (PVP), polyvinyl alcohol (PVA), polyethylene oxide, methylcellulose (MC) to hold the ink. , Hydroxypropylcellulose (HPC), carboxymethylcellulose (C
A hydrophilic organic polymer such as MC) is coated and used as a treatment agent for an ink receiver.

However, since these organic polymers are hydrophilic, they cannot be sufficiently absorbed by ink even when they are coated on paper or a support such as OHP alone and printed, so that the ink dots are blurred or blurred. , And cannot exhibit sufficient printing performance.

Further, under the condition of high temperature and high humidity, the ink receiving layer has a drawback that it absorbs moisture in the air, increases adhesiveness, and becomes difficult to handle. Looking individually,
PVP, MC, HPC, and CMC have relatively high printing performance, but image quality deteriorates over time, and curls easily upon drying after coating. Further, PVA has relatively high water resistance, but therefore has poor ink fixability and is easily curled like PVP. Polyethylene oxide does not easily curl, but has poor image quality and water resistance.

[0005] Further, in order to solve these problems of the hydrophilic polymer alone, attempts have been made to chemically modify, mix, or add various additives to each polymer. Even now, development is being actively pursued in pursuit of higher printing performance and higher water resistance.

On the other hand, Japanese Patent Publication No. Hei 8-503903 discloses an ink jet recording sheet containing a high molecular weight compound having a molecular weight of 50,000 to 300,000 comprising polyoxyalkylene glycol and a polycarboxylic acid or an anhydride thereof. ing. However, there is no disclosure of specific production examples and experimental examples, and there is no disclosure of examples using the high molecular weight compound in an ink jet recording sheet and examples evaluating its performance and the like. Furthermore, there is no specific study on the preferable range for the acid value of the high molecular weight compound and the disclosure of any information.

[0007]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to realize high printing performance and water resistance as a treatment agent for an aqueous ink receiver.

[0008]

Means for Solving the Problems According to the present invention, as a result of intensive studies to solve the above problems, a high molecular weight polyether represented by the following general formula (1) is contained in a treating agent for an aqueous ink receiver. The inventors have found that the above problem can be solved by including polyester, and have completed the present invention. Specifically, using a specific polyanhydride as a chain extender,
By including a high molecular weight polyether polyester defined by the acid value, the amount of the carboxyl group to be introduced,
It could be solved.

[0009]

Embedded image

Wherein R is a divalent organic residue, Z is a tetravalent organic residue, and X and Y are each a group consisting of a hydrogen atom, a metal atom, an ammonium group and an organic amine group. At least one selected from n = 1 to 1000
It is. That is, the treating agent for an aqueous ink receiver according to the present invention is a water-based ink containing a treating agent for an aqueous ink receptor comprising a paper material and a non-paper material as a base material and comprising a high molecular weight polyether polyester. It has an ink receiving layer. Here, paper refers to a sheet obtained by making wood fibers such as pulp. In addition, examples of materials other than paper include fiber materials such as cloth, plastics, and sheets such as OHP sheets (specifically, polyester film sheets).

The aqueous ink receptor treating agent according to the present invention contains a high-molecular-weight polyether polyester as a film-forming resin or a high-molecular-weight polyether polyester on the paper and / or non-paper base material. By impregnating a treatment agent described below that also contains a film-forming resin other than the molecular weight polyether polyester, the surface of the wood fiber is partially or entirely covered with the aqueous ink receptor treatment agent. is there. Examples of the impregnation method include a method of applying a treatment agent to the surface of the base material, or a method of dipping the base material in the treatment agent.

In order to more effectively achieve the object of the present invention, the content of the high molecular weight polyether polyester in the aqueous ink receiver treating agent is preferably 1% by weight or more. The treating agent for the aqueous ink receiver may contain only a high-molecular-weight polyether polyester as the film-forming resin, but if it contains a film-forming resin other than the high-molecular-weight polyether polyester, the high-molecular-weight polyether polyester may be used. A film-forming resin other than ether polyester may be used to replace a part of the film-forming resin required for forming the aqueous ink-receptor treating agent. It is preferable because it can be exerted by a treatment agent for an ink receiver, assist the action of a high molecular weight polyether polyester, or exhibit a synergistic action with a high molecular weight polyether polyester.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The molecular weight of the high molecular weight polyether polyester contained in the aqueous ink receptor treating agent of the present invention is not particularly limited, but is in the range of 5,000 to 500,000 in number average molecular weight measured by GPC. Is preferably used.

When the number average molecular weight is less than 5,000, the strength of the coating film is insufficient, so that when printed by an ink jet printer, marks on the guide roller of the printer are liable to be formed or scratched. The number average molecular weight is 500,0
When it is larger than 00, the dissolving workability in the solvent is reduced,
The support may curl during drying after coating, which is not preferable. The description about the molecular weight in the present application is the result of measurement by GPC.

The high molecular weight polyether polyester is
It is preferable to use a high molecular weight polyether polyester obtained by elongating polyethylene glycol with a polyanhydride.

The acid value in the polymer is not particularly limited as long as it is 0.8 to 160 when it is used as a treatment agent for receiving an aqueous ink, but is preferably 2.0 to 80, and more preferably 2.0 to 80. 4.0-20.

By incorporating a high molecular weight polyether polyester having a specific acid value in the high molecular weight polyether polyester into the aqueous ink receiving layer, the balance between hydrophilicity and water resistance is excellent, and the base material (material Although not particularly limited, an aqueous ink-receiving layer having excellent adhesion to a PET film or the like and excellent color development performance due to good affinity with ink can be provided.

More specifically, the high molecular weight polyether polyester is preferably a polymer obtained by extending the chain of polyethylene glycol with tetracarboxylic dianhydride. As the chain extender, tetracarboxylic dianhydride, specifically, pyromellitic anhydride, or the like is preferable. These have a benzene ring in the skeleton and can increase the molecular weight of the polyether polyester by a chain extension reaction and can introduce a carboxyl group into the skeleton of the polymer.

Further, since it contains a benzene ring, it is possible to introduce a benzene ring into the skeleton of the polymer. By introducing a benzene ring, water resistance, heat resistance and the like can be imparted.
In this way, by using the above-mentioned specific chain extender and by using a high molecular weight polyether polyester having an acid value,
An aqueous ink receiver having excellent hydrophilicity, water resistance, adhesion to a substrate, and color developing performance of an ink can be provided.

In the aqueous ink receptor treating agent of the present invention, the solvent of the coating liquid used for forming the ink receiving layer is preferably water from the viewpoint of environment and safety, but the dispersibility of the fine particles is remarkable. Organic solvents such as alcohols can be used as long as they do not change, and they can be used alone or as a mixture.

The concentration of the high molecular weight polyether polyester used in the aqueous ink receptor treating agent of the present invention is not particularly limited as long as it has a viscosity capable of applying the coating liquid to the support. On the other hand, 0.1 to 20% is preferable.
If it is less than 0.1%, the amount of coating must be increased in order to obtain a sufficient thickness of the coating layer, and it is not economical because much time and energy are required for drying. On the other hand, if it exceeds 20%, the viscosity is too high when used in combination with fine particles, and the coatability deteriorates. Therefore, a concentration of 1 to 20% is preferably used.

In the aqueous ink receptor treating agent of the present invention, a water-soluble polymer other than a high molecular weight polyether polyester is used in order to stably retain the fine particles on the support within a range that does not significantly affect the dispersibility of the fine particles. And high molecular weight polyether polyesters. Available water-soluble polymers include PVP,
PVA, polyethylene oxide, MC, HPC, CM
C, starch, casein, gum arabic, sodium alginate, sodium polyacrylate, polydioxolan, and the like.

The thickness of the ink-receiving layer used in the aqueous ink-receptor treating agent of the present invention is preferably 1.0 to 50 μm. If it is less than 1.0 μm, the water content of the ink cannot be sufficiently absorbed, and a clear image cannot be obtained. Also 5
A thickness of 0 μm or more is not preferred because it may curl during drying after coating.

The coating amount of the ink receiving layer, that is, the coating layer, used in the aqueous ink receptor treating agent of the present invention is 0.5
５０50 g / m ² , more preferably 1.0-30 g / m ²
It is. When the amount is less than 0.5 g / m ² , the water content of the ink cannot be sufficiently absorbed, and the effect of the ink cannot be sufficiently exhibited due to the flow of the ink or the bleeding of the image. 50g / m
^When it is more than ^2, it is not economical because the entire recording medium curls during drying and a remarkable effect on printing performance cannot be expected. Therefore, 0.5 to 50 g / m ² is preferable.

The fine particles used in the treating agent for an aqueous ink receiver of the present invention can be used regardless of the kind as long as they are effective for preventing spheroidization of a high molecular weight polyether polyester. But it can be inorganic. In terms of water resistance, inorganic fine particles such as silica, alumina, titania, and zirconia are preferable, and silica and alumina are particularly preferable.

These can be used alone,
It is also possible to use a mixture of two or more types. The silica fine particles may be synthetic silica or naturally occurring silica. As the synthetic silica, it is possible to use colloidal silica in colloidal aqueous solution, ultra-fine silica fine particles synthesized in the gas phase, and those obtained by physically crushing relatively large particles to the desired particle size using a special mill. It is.

As the colloidal silica, Nissan Chemical Co., Ltd.
Snowtex, Du Pont Ludox, M
Onsanto's Syton, Nalco's Nal
It can be obtained under a trade name such as coag. The alumina fine particles can be obtained under a trade name such as Alumina Sol # 520 manufactured by Nissan Chemical Industries, Ltd.

The particle diameter of the fine particles used in the aqueous ink receptor treating agent of the present invention is preferably 1000 nm or less, and is not particularly limited as long as it can prevent spheroidization of the high molecular weight polyether polyester. However, when transparency is required for the ink receiving layer, the thickness is preferably 500 nm or less.
It is preferably 0 nm or less, most preferably 50 nm or less. The shape of the particles is not particularly limited, but is preferably close to spherical.

In the treating agent for an aqueous ink receiver of the present invention, the weight ratio of the high molecular weight polyether polyester to the inorganic fine particles in the coating liquid is preferably from 1: 0.2 to 1: 1.4. When the weight ratio of the inorganic fine particles to the high-molecular-weight polyether polyester 1 is less than 0.2, the high-molecular-weight polyether polyester is remarkably crystallized, and the fixing property of the ink is rapidly lowered. If the weight ratio of the inorganic fine particles to the high molecular weight polyether polyester 1 is more than 1.4, the ink dots tend to aggregate, and the image quality deteriorates.

In the aqueous ink receiver treating agent of the present invention, a metal alkoxide can be contained in the ink receiving layer in order to further improve water resistance. Usable metal alkoxides include organosilanes, aluminum alkoxides, titanium alkoxides, zirconium alkoxides, silanol-modified polyvinyl alcohol, and the like, with silanol-modified polyvinyl alcohol being preferred.

The usable amount and concentration can be used within the range in which the solubility of the metal alkoxide in the solvent is maintained. Examples of organosilanes include tetramethoxysilane and tetraethoxysilane, and examples of aluminum alkoxides include aluminum triisopropoxide.
As the titanium alkoxide, titanium tetraisopropoxide and the like are preferably used. Further, as the silanol-modified polyvinyl alcohol, a functional polyvinyl alcohol manufactured by Kuraray Co., Ltd., R series and the like are easily available and can be used. Further, after a coating liquid containing the ink receiving layer is applied to the support, the metal alkoxide is reacted with the inorganic fine particles contained in the ink receiving layer by heat treatment to form a film having high water resistance ( Treatment with a metal alkoxide) is also possible, and the same effect can be obtained by using fine particles previously treated with a metal alkoxide before coating.

In the aqueous ink recording medium coated with the aqueous ink receptor treating agent of the present invention, in order to improve the water resistance of the receiving layer containing a resin having a hetero bond in the ink receiving layer, it is necessary to use ultraviolet rays or the like. Irradiation with ionizing radiation is effective. Although the reason for this effect is not clearly understood, one reason is that hydrogen on carbon adjacent to a heteroatom in a hetero bond is relatively easily cleaved as a radical by irradiation with ultraviolet light or the like. That radical is generated. It is considered that the radicals on the polymer molecular chain thus formed are bonded to each other to form a crosslinked structure. At this time, since the polymer is crosslinked and the radical concentration is low, a gentle crosslinked structure having a low crosslinking density is formed. Therefore, it is presumed that the water resistance is improved while the ink absorbency is relatively maintained. Conversely, if the irradiation time is too long, no matter how much crosslinking agent is added,
The crosslink density increases and ink absorbency decreases. Therefore, the irradiation time must be within a certain time.

As described above, a photoinitiator, a photosensitizer, a photocrosslinking agent, or a compound containing an unsaturated bond, which are usually required for a radiation-curable resin, are not particularly required. These additives and compounds may be used in combination for the purpose of improving the efficiency.

The ionizing radiation that can be used in the present invention is not particularly limited.
β-rays, γ-rays, X-rays, electron beams and the like. However, since α-rays, β-rays, γ-rays, or X-rays pose a risk to the human body, ultraviolet rays, which are easy to handle and are widely used industrially, are effective.

The irradiation time depends on the type of ionizing radiation,
For example, the irradiation time of ultraviolet rays is preferably within 10 seconds. More preferably, it is within one second. If the time is longer than 10 seconds, the crosslink density may be too high depending on the resin used for the ink receiving layer, and it may be difficult to absorb the ink. Further, the production efficiency is lowered, which is not economically preferable. As a light source of the ink receiving layer to be used, for example, a low-pressure mercury lamp,
Medium-pressure mercury lamps, high-pressure mercury lamps, xenon lamps, tungsten lamps and the like are used.

In the recording medium for aqueous ink of the present invention,
The solvent of the coating liquid used when forming the ink receiving layer is preferably water from the viewpoint of environment and safety, but an organic solvent such as alcohol can be used as long as the dispersibility of additives and the like does not significantly change. , Alone or as a mixture.

The ink-receiving layer used in the aqueous ink-receptor treating agent of the present invention may contain a pigment, a dispersant,
Add thickeners, pH adjusters, lubricants, flow modifiers, surfactants, defoamers, foam inhibitors, release agents, penetrants, fluorescent brighteners, ultraviolet absorbers, antioxidants, etc. Is also possible.

In the aqueous ink receiver treating agent of the present invention, smectite, aluminum silicate, magnesium silicate, basic magnesium carbonate, kaolin, talc, clay, hydrotalcite, calcium carbonate, zinc oxide, calcium sulfate are used as pigments. It is also possible to use barium sulfate, zinc hydroxide, zinc sulfide, zinc carbonate, diatomaceous earth, zeolite and the like.

The support used in the aqueous ink receptor treating agent of the present invention is not particularly limited.
Synthetic paper, white film, transparent film and the like can be used. As the paper, high quality paper, medium quality paper, art paper, coated paper, cast coated paper, foil paper, kraft paper, impregnated paper, vapor-deposited paper, and the like can be used as appropriate. The film and sheet are flexible, high strength, high gloss polyethylene terephthalate, polyimide, polycarbonate,
Polyacetate, polyethylene, polypropylene, etc. can be used, among which the transparent support is OHP
By using the composition of the present application, the processing agent for an aqueous ink receptor, which has excellent coloring properties and image quality as compared with the conventional one and suppresses the spheroidization of the receiving layer, so that it hardly changes over time. Is obtained. In order to further improve the strength of the ink receiving layer, corona discharge treatment or various undercoat treatments can be performed.

In the aqueous ink receptor treating agent of the present invention, the method for coating the ink receiving layer includes spin coating, roll coating, blade coating, air knife coating, gate roll coating, and bar coating. , Size press method, spray coat method, gravure coat method, curtain coat method, rod blade coat method, lip coat method, slit die coat method, etc. are applied to the support and dried by hot air dryer etc. The recording medium of the invention is obtained.

In the treating agent for an aqueous ink receiver of the present invention, it is possible to add urea for improving the ink fixing property, or thiourea for the purpose of reducing the tackiness of the ink receiving layer. . Each of these may be used alone, but it is also possible to obtain two effects simultaneously by using them together. These additions also
The effect is not particularly limited as long as it is a treating agent for aqueous ink receptor containing a general water-soluble polymer.
The amount of these additives is not particularly limited, but is preferably 0.1 to 25% based on the total weight of the high molecular weight polyether polyester and the fine particles in order to maintain image quality.

In the present invention, the content of the high-molecular-weight polyether polyester in the treating agent for an aqueous ink receiver is as follows:
Although not particularly limited, it is preferably 0.1% by weight or more, and more preferably 0.5% by weight or more, because there is little bleeding of color mixture and color development is high. In the present invention, the treating agent for aqueous ink receptor may be one containing only a high molecular weight polyether polyester as a film-forming resin,
When the film-forming resin also contains a film-forming resin other than the high-molecular-weight polyether polyester, for example, effects such as higher inkjet printing suitability can be obtained with a small amount of the high-molecular-weight polyether polyester.

The film-forming resin is not particularly limited as long as it is a resin that forms a film, but is a substantially water-insoluble resin (water-insoluble resin) capable of forming an aqueous dispersion, or a water-soluble resin. Resins are preferred from the viewpoint of safety and working environment conservation when producing the aqueous ink receptor treating agent of the present invention since the treating agent for the paper base can be made water-based.

Specific examples of the film-forming resin other than the high-molecular-weight polyether polyester include, for example, natural resins such as oxidized starch, cationized starch, pullulan, hydroxyethylcellulose and carboxymethylcellulose; polyvinyl alcohol, polyvinylpyrrolidone, polyvinylformamide , Polyvinyl acetamide, styrene / butadiene rubber and the like; acrylics such as poly (meth) acrylamide and poly (meth) acrylate; polyethers such as polyethylene oxide, polyethylene glycol and polypropylene glycol;
Condensation resins such as nylon, urethane and polyester are preferred. Starch and polyvinyl alcohol are particularly preferred in terms of good ink absorbency and ink strike-through prevention properties, and styrene / butadiene rubber, acrylic resins and urethane resins. Resins are preferred because they have low ink bleeding and high color developability.

Further, an acrylic resin and a urethane resin are mixed, or an acrylic polymerizable monomer is added to a dispersion of the urethane resin and polymerized. A composite of an acrylic resin and a urethane resin, which is generally referred to as "acryl / urethane", obtained by reacting an acrylic resin dispersion having a functional group having a property with an isocyanate is an acrylic resin. It is particularly preferable in that the ink does not bleed as compared with the case of using the resin alone or the urethane resin alone.

With respect to the form of the paper base treating agent, bulk,
There is no particular limitation on a solution, an aqueous dispersion (emulsion, latex), etc., but considering the easiness of processing work on a paper substrate, when a solution or an aqueous dispersion is used, processing such as impregnation, application, and spraying is performed. Is preferred in that it is easier to handle than bulk, and handling as an aqueous treating agent such as an aqueous solution or an aqueous dispersion is preferred in terms of work safety and work environment preservation. Therefore, as the film-forming resin other than the high molecular weight polyether polyester and its form, at least one selected from styrene / butadiene rubber latex, urethane emulsion and acrylic emulsion is preferable, and the above-mentioned “acryl / urethane” Is particularly preferred.

The method for producing the treating agent for an aqueous ink receptor is not particularly limited. For example, a high molecular weight polyether polyester may be used as it is, or a high molecular weight polyether polyester and a film-forming resin other than the high molecular weight polyether polyester may be used. Is diluted with a solvent as needed, to prepare a coating solution (treatment agent), and then the paper substrate is impregnated, coated, or sprayed using a gate roll coater, an air knife coater, a spray, or the like. After the treatment, further drying, if necessary, a method of manufacturing through other conventional methods, or powdering a high molecular weight polyether polyester or a film forming resin other than the high molecular weight polyether polyester and the high molecular weight polyether polyester. And attach it to the paper substrate using static electricity or spray, And a method such as fixing by heating, if necessary after.

In addition, when the paper base material is treated, the surface of the paper base material is made high in order to assist the adhesion of the high molecular weight polyether polyester or the film-forming resin other than the high molecular weight polyether polyester and to make the paper base strong. An adhesive layer may be provided between the resin and a film-forming resin other than the high molecular weight polyether polyester and the high molecular weight polyether polyester.

The diluting solvent is not particularly limited, but may be water,
Solvents such as acetone, isopropyl alcohol, toluene, tetrahydrofuran, chloroform, and dioxane are preferable, and among them, water, isopropyl alcohol, and toluene are particularly preferable because of high safety. The concentration of the high molecular weight polyether polyester in that case is not particularly limited, but is usually 0.1 to 30% by weight, and more preferably 0.5 to 15% by weight.

When the solution concentration is less than 0.1% by weight, the ink-jet printability of the obtained image receiving paper may be low. On the other hand, when the solution concentration is higher than 30% by weight, the viscosity of the coating liquid is extremely high, and it may be difficult to process the coating liquid on paper.

The coating liquid may be mixed with various stabilizers, dispersants, defoamers, surfactants, pH regulators, fillers, pigments, dyes, and other additives. it can. The coating amount of solids contained in the coating liquid (solids coating amount) is usually 0.1% per area of the paper substrate.
It is preferably from 0.01 g / m ^{2 to 20} g / m ² ,
More preferably ^{1g / m 2 ~10g / m 2} .

When the coating amount is less than 0.01 g / m ² , the bleeding of the ink or the like becomes large, and sufficient ink jet printability may not be obtained. On the other hand, when the coating amount is 2
When the amount is more than 0 g / m ² , it is not only uneconomical but also the printability such as the ink absorption rate may be deteriorated because the coating liquid completely covers the entire surface of the wood fibers of the paper substrate. .

There are no particular restrictions on the substrate that can be used in the aqueous ink receptor treating agent of the present invention. For example, as a sheet obtained by making wood fibers such as pulp,
Ultra-light paper, lightweight paper, high-quality paper, semi-finished paper and the like can be mentioned. Or fiber material such as cloth, various plastic sheets, OH
A P sheet (specifically, a polyethylene terephthalate film or the like) is exemplified.

The R in the general formula (1) is not particularly limited as long as it is a divalent organic residue, but is preferably a divalent organic residue having 2 to 6 carbon atoms. CH2CH
2-, -CH2-CH (CH3)-, -CH2CH2C
Structural units such as H2CH2-, and the like, and one having one or two or more of them as necessary may be used.

The Z in the general formula (1) is not particularly limited as long as it is a tetravalent organic residue, but has 4 to 20 carbon atoms.
Are preferred, specifically, phenyl, butyl, biphenyl, p-terphenyl, benzophenyl, cyclopentyl, naphthyl, peryl, tetrahydrofuryl, and diphenylsulfonyl groups And the like, and may have one kind or two or more kinds as necessary.

Specific examples of the structural unit represented by the above general formula (1) include structural units represented by the following general formulas (2) to (12). It may have two or more types.

[0057]

Embedded image

[0058]

Embedded image

[0059]

Embedded image

[0060]

Embedded image

[0061]

Embedded image

[0062]

Embedded image

[0063]

Embedded image

[0064]

Embedded image

[0065]

Embedded image

[0066]

Embedded image

[0067]

Embedded image

(In the above general formulas (2) to (12), R is a divalent organic group having 2 to 6 carbon atoms, Z is a tetravalent organic group having 4 to 20 carbon atoms, and X and Y are All are one or more selected from a hydrogen atom, a metal atom, an ammonium group and an organic amine group, and n = 1 to 1000.)

The polycarboxylic acid anhydride having a specific structure as described above can be used as a chain extender to introduce a carboxyl group into a polymer having a high molecular weight polyether polyester structure. And the amount introduced can be defined by the acid value.
The preferred acid value is 2.0-80, more preferably 4.0-20. By defining this acid value, the hydrophilicity derived from the polyether polyester structure, the water resistance derived from the polyhydric anhydride having a specific structure having an aromatic ring, and the amount introduced, that is, defined by the acid value A polymer optimal for an ink jet receiving layer having excellent total balance such as hydrophilicity derived from the introduced carboxyl group or adhesion to a substrate can be obtained.

The general formulas (1) and (2) to (1)
X and Y in 2) are each a hydrogen atom, a metal atom,
It is at least one selected from the group consisting of an ammonium group and an organic amine group, and X and Y may be the same or different.

The metal atom is not particularly limited as long as it forms a salt with a carboxyl group. Specifically, sodium, potassium, magnesium, calcium,
Zinc, titanium, zirconium, etc .;
Species or, if necessary, two or more species may be used.

The organic amine group is not particularly limited as long as it is derived from an organic amine and has a structure formed by forming a salt from the organic amine and a carboxyl group. Specific examples of such organic amines include triethylamine, pyridine, tripropylamine, 1,4-diazabicyclo [2.2.2] octane, tetramethylethylenediamine, and the like. And two or more types may be used.

The polyether structural unit: n is not particularly limited as long as it is 1 or more, but is usually 1 to 1000, preferably 25 to 700. Polyether structural unit: n
Is smaller than the above range, the hydrophilicity is reduced,
The effect as the treating agent for the aqueous ink receiver according to the present invention is lost. On the other hand, when the polyether structural unit: n is larger than the above range, the proportion of the polyester and / or polycarboxylic acid and / or polycarboxylate in the aqueous ink receiver treating agent decreases,
This is not preferable because water resistance, which is the ability to hold ink, is reduced.

The treating agent for an aqueous ink receiver having a polyether polyester structure according to the present invention includes, for example,
It is obtained by a reaction between polyethylene glycol and tetracarboxylic dianhydride.

The number average molecular weight of polyethylene glycol used as a raw material for the reaction is not particularly limited, but is usually 2
00 to 30,000, preferably 300 to 30,000
, More preferably 700 to 25,000, and most preferably 1,000 to 20,000. If the average molecular weight of the polyethylene glycol is smaller than the above range,
Because the polyester component increases, hydrophilicity decreases,
The effect as the treating agent for the aqueous ink receiver according to the present invention is lost.

On the other hand, when the average molecular weight of the polyethylene glycol is larger than the above range, the one obtained by synthesizing a polyether polyester by carrying out a chain extension reaction with a tetracarboxylic dianhydride to be described later is an aqueous ink. The proportion of the polyester and / or polycarboxylic acid and / or polycarboxylate in the receptor treating agent is small, and the water resistance, which is the ability to hold the ink, is not preferable.

The tetracarboxylic dianhydride used as a raw material for the reaction is not particularly limited as long as it has two acid anhydride groups. For example, butane-1,2,3,4-tetracarboxylic diacid Anhydride, pyromellitic dianhydride, biphenyltetracarboxylic dianhydride, p-terphenyl 3,
4,3 ′, 4′-tetracarboxylic dianhydride, 3,
3 ', 4,4'-benzophenonetetracarboxylic dianhydride, 1,2,3,4-cyclopentanetetracarboxylic dianhydride, naphthalene-1,4,5,8-tetracarboxylic diacid Anhydride, 3,4,9,10-perylenetetracarboxylic dianhydride, 2,3,4,5-tetrahydrofurantetracarboxylic dianhydride, 3,3 ′,
4,4′-diphenylsulfonetetracarboxylic dianhydride, bicyclo [2.2.2] oct-7-ene-2,
Examples thereof include 3,5,6-tetracarboxylic dianhydride and the like, and one or more of these may be used.

Among these tetracarboxylic dianhydrides, pyromellitic dianhydride, butane-1,2,3,4-
At least one selected from tetracarboxylic dianhydride and 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride is more preferable because of high reactivity and production efficiency.

When the above-mentioned tetracarboxylic dianhydride is used, a neutralizing agent may be used. At least one selected from the group consisting of metal compounds, simple metals, ammonia and amines is added to the neutralizing agent.

Specific examples of the metal compound used as the neutralizing agent and the metal atom constituting the simple metal include lithium, sodium, potassium, rubidium, cesium, francium, beryllium, magnesium, calcium, strontium, barium, radium, and the like. Titanium,
Zirconium, hafnium, vanadium, niobium, chromium, molybdenum, tungsten, manganese, iron, ruthenium, osmium, cobalt, rhodium, iridium,
Nickel, copper, silver, zinc, cadmium, mercury, aluminum, gallium, indium, thallium, silicon, germanium, tin, lead, antimony, bismuth, scandium, and the like. One or more of these are used. One or more selected from lithium, sodium, potassium, rubidium, cesium, magnesium, calcium, strontium, barium, chromium, manganese, iron, cobalt, nickel, copper, zinc, aluminum, titanium, zirconium Is preferred because it is relatively easy to handle, easily introduced as a carboxylate, and becomes a relatively stable salt.

As the metal compound used as the neutralizing agent, oxides, carboxylate salts,
Metal alkoxides, carbonates, hydroxides, hydrides, peroxides, chlorides, sulfates, nitrates, phosphates, sulfites,
And the like. One or more of these metal compounds may be used as needed. Above all, when the metal compound is at least one selected from oxides, carbonates, hydroxides, and carboxylate salts, the compatibility with polyethylene glycol and polyether polyester is good, so that the metal can be easily introduced. It is preferable because it can be manufactured, has high safety, is easy to handle during manufacture, and is inexpensive.

As the neutralizing agent, a simple metal that is not a metal compound can be used as it is. Particularly preferred specific examples of the metal simple substance include lithium, sodium, and potassium. However, in the case of using such a metal simple substance, it is necessary to ensure the safety because there is a high risk of causing a fire by reacting with air or moisture.

Specific examples of amines used as the neutralizing agent include trimethylamine, triethylamine, tripropylamine, pyridine, pyrrolidine, pyrrole, dimethylamine, diethylamine, dipropylamine, hexamethylenediamine, 1,4 -Diazabicyclo [2.2.2] octane, hydrazine, N, N-dimethylcyclohexylamine, ethylamine, aniline,
Toluidine, allylamine, diallylamine, triallylamine, isopropylamine, diisopropylamine, 3,3′-iminobis (propylamine), 2-ethylhexylamine, 3- (2-ethylhexyloxy) propylamine, 3-ethoxypropylamine, diisobutylamine , 3- (diethylamino) propylamine, di-2-ethylhexylamine, 3- (dibutylamino) propylamine, tetramethylethylenediamine, tri-n-octylamine, tert-butylamine, 2-butylamine, picoline, vinylpyridine, pipecoline , Piperazine, piperidine, pyrazine, ethanolamine, diethanolamine, triethanolamine and the like. These amines may be used alone or, if necessary, in combination of two or more. Among them, the amines are triethylamine, pyridine, tripropylamine, 1,4-diazabicyclo [2.2.2].
At least one selected from octane and tetramethylethylenediamine is preferable because it is easily available and inexpensive, and amines can be easily introduced as a carboxylate.

The amount of the neutralizing agent used is not particularly limited as long as it is 0.001 to 10.0 mol per mol of tetracarboxylic dianhydride, preferably 0.01 to 6.0 mol. More preferably, it is 0.05 to 5.0 mol, most preferably 0.1 to 4.0 mol. If the addition amount is larger than the above range, the neutralizing agent cannot be uniformly dispersed and dissolved in the polyether polyester, so that the mechanical strength of the polyether polyester decreases. On the other hand, when the amount of the neutralizing agent is small, the reaction time is prolonged, and the production efficiency is reduced. If the amount of the neutralizing agent is less than the above range, the effect of adding the neutralizing agent, ie, the pH adjusting effect and the effect of increasing the mechanical strength, are significantly reduced.

The neutralizing agent may be added at the start of the reaction, during the reaction, or at any time after the reaction in synthesizing the polyether polyester, but the neutralizing agent may be present at the start of the reaction and / or during the reaction. It is more preferable to increase the production efficiency. When adding the neutralizing agent, a solvent may be used to improve the dispersion of the neutralizing agent. However, the absence of the solvent is more efficient because the step of removing the solvent can be omitted.

The reaction temperature for performing the above reaction is not particularly limited. Preferably 70-300 ° C, more preferably 80-200 ° C, most preferably 90-180 ° C
It is. If the reaction temperature is lower than the above-mentioned range, the reaction time may take many hours or unreacted raw materials may remain, which may lower the production efficiency. On the other hand, if the reaction temperature is higher than the above-mentioned range, the polyether polyester produced during the reaction may be thermally degraded, which is not preferable.

The reaction pressure at the time of carrying out the above reaction is usually 0.1.
003 MPa or higher, preferably 0.030 MPa or higher, more preferably 0.080 MPa or higher, and most preferably 0.1 MPa or higher.
094 MPa or more. If the reaction pressure is too low, the reaction system will be in a reduced pressure state, and the dehydration reaction, which is a side reaction, will be promoted between the reaction system and hydroxyl groups in the obtained polyether polyester. When the side reaction is promoted, the carboxyl value of the polyether polyester decreases, the cohesive force of the carboxyl groups existing between the molecules of the polyether polyester is lost, and the mechanical strength is significantly reduced.

In the above-mentioned reaction for extending the chain of the low-molecular-weight polyalkylene oxide with a polyhydric anhydride, focusing on the amount of the active proton compound present in the reaction system, the content of the active proton compound was adjusted to 5,000 ppm. The following is preferred. In particular, in a reaction in which a low molecular weight polyalkylene oxide is chain-extended by a polyhydric anhydride, a typical active proton compound is water, which is contained in a large amount in the low molecular weight polyalkylene oxide as a raw material.

The above-mentioned reaction system is defined as low-molecular-weight polyalkylene oxide and / or polyacid anhydride and / or neutralizer and / or gas remaining in the reaction system and / or a reaction apparatus and / or a raw material introduction section. And includes all parts that may directly or indirectly come into contact with the reaction raw materials and reaction products or through an inert gas such as nitrogen, argon, or helium.

The content of the active proton compound (typically water in the case of low molecular weight polyalkylene oxide) in the reaction system according to the present invention is preferably adjusted to 5,000 ppm or less, more preferably 1,000 ppm. Or less, more preferably 500 ppm or less, and most preferably 200 ppm or less.

When the content of the active proton compound (typically water in the case of the low-molecular-weight polyalkylene oxide is water) is larger than the above-mentioned range, the polyanhydride becomes reactive with the active proton compound. Is higher than the low-molecular-weight polyalkylene oxide, the reaction occurs before reacting with the low-molecular-weight polyalkylene oxide, and the reaction with the originally intended low-molecular-weight polyalkylene oxide is less likely to occur or preferably does not occur. Absent. In other words, if the reaction does not easily occur, or if the reaction does not occur, the intended chain extension reaction is not effectively performed, which is not preferable.

Similarly, active protons other than water also become a factor inhibiting the reaction between the low molecular weight polyalkylene oxide and the polyanhydride. Specific examples of active protons other than water include methanol, ethanol, propanol, phenol, alcohol compounds such as ethylene glycol, ammonia, methylamine, amine compounds such as aniline, sodium hydride, hydrogenated compounds such as calcium hydride,
Hydroxides such as sodium hydroxide and potassium hydroxide, carboxylic acid compounds having a carboxyl group such as acetic acid, formic acid, oxalic acid and acrylic acid; inorganic acids such as sulfuric acid, nitric acid, hydrochloric acid and phosphoric acid; phosphotungstic acid; Phosphomolybdic acid,
Heteropoly acids such as trifluoromethanesulfonic acid, and others, at 250 ° C. or lower under atmospheric pressure or 1 Pa to 0.0
A compound having a substituent which is volatile under a vacuum of 9 MPa and is reactive with an acid anhydride group can be used.

When the above-mentioned compound having an active proton other than water is contained in the reaction system, it is 5,000 pp.
m or less is preferable. More preferably, 1,0
00 ppm or less, and more preferably, 500 pp
m or less, and most preferably 200 ppm or less. As described above, in the case of a low-molecular-weight polyalkylene oxide, a typical active proton compound is water, and it is preferable to select and use a low-molecular-weight polyalkylene oxide as a raw material containing a small amount of water. This is the actual state of the invention. For example, performing the chain extension reaction while removing water from the reaction system is also a preferred embodiment of the reaction. The technique used for the purpose of reducing the amount of the active proton compound in the reaction system is not particularly limited, and can be applied to this reaction.

For example, as described above, it is preferable to select and use a low molecular weight polyalkylene oxide having a small amount of the active proton compound (typically water) as a raw material, but the active proton compound (typically water) is preferably used. Even if the amount is large, the amount of the active proton compound in the system can be reduced by devising the reaction while devolatilizing or the like, and the chain extension reaction can be effectively caused preferably.

In carrying out the above-mentioned reaction, it is preferable to carry out the reaction using a high-viscosity reactor, since the production can be carried out more easily and efficiently. As a specific example of the high-viscosity reactor, a horizontal twin-screw kneading device in which stirring shafts connected to deformed blades are arranged side by side, two stirring shafts arranged side by side and the stirring shafts were incorporated with their phases deformed. A self-cleaning type horizontal twin-screw kneading device having a convex lens-shaped paddle, a horizontal twin-screw kneading device in which stirrers having a shaftless structure in which lattice-like blades are arranged are arranged, and a plate-shaped stirring blade disposed inside. A vertical kneading device having a concentrically arranged deformed spiral blade outside the plate-shaped stirring blade, a vertical kneading device having an inverted conical ribbon blade, and a shaftless structure in which twisted lattice-shaped blades are connected. Vertical kneading device having a stirring blade of a single-screw or twin-screw extruder, and a horizontal twin-screw kneading device having a stirring shaft connected to a deformed blade provided with a single-screw or a twin-screw extruder for discharging are arranged.

A devolatilizer is provided in addition to the above-mentioned high viscosity reactor, and devolatilization is carried out in parallel while synthesizing a polyether polyester by the reaction of a low molecular weight polyalkylene oxide and an acid dianhydride. It can also be completed to the desired level. Further, a molding powder, an auxiliary binder, a fluidizing agent, and the like may be mixed while and / or after synthesizing the polyether polyester in the high-viscosity reactor.

When the above reaction is carried out, a solvent is used in order to prevent low viscosity at the beginning of the reaction, but to increase the viscosity together with the molecular weight in the latter stage of the reaction and to make stirring difficult. Is also good. Specific examples of the reaction solvent include benzene, toluene, xylene, ethylene carbonate, propyl carbonate, methyl acetate, ethyl acetate, propyl acetate,
Butyl acetate, tetrahydrofuran, 1,4-dioxane, anisole, acetone, methyl ethyl ketone, diethyl ketone, methyl propyl ketone, dichloromethane,
Examples thereof include dichloroethane, chloroform, carbon tetrachloride, acetonitrile, pyridine, dimethylformamide, ethylenediamine, and propylenediamine.
One of these reaction solvents or, if necessary, a mixture of two or more thereof may be used.

The acid value of the high molecular weight polyether polyester of the present invention is not particularly limited as long as it is 0.8 to 160.
Preferably 2.0 to 80, more preferably 4.0 to 20
It is. When the acid value is smaller than the above-mentioned range, it is not preferable because the coloring property, the boundary line, the water absorption, the strike-through, and the water resistance decrease. When the ratio is larger than the above range, the proportion of hydrophobic groups such as aromatic groups and aliphatic groups in the high-molecular-weight polyether polyester increases, so that the water solubility decreases and the function as a processing agent for the aqueous ink receptor decreases. Is not preferred.

[0099]

EXAMPLES The present invention will now be described specifically with reference to examples, but the present invention is not limited to these examples.

[Acid value] The evaluation sample was dissolved in pure water,
The acid value was measured according to IS K0070.

[Attached Amount of Receptor Treatment Agent] The attached amount of the receptor treatment agent was determined according to the following method. The attached amount of the receptor treatment agent (g / m ² ) = W1 / A−W0 W1: Weight (g) of film cut out after processing W0: Weight per unit area of unprocessed film (g / m
² ) A: The area (m ² ) of the film cut out after the treatment was determined.

[Performance Evaluation] The performance evaluation was performed as a full-color ink jet printer using a BJC-manufactured by Canon Inc.
Using 600J, an image in which solid images of yellow, cyan, magenta, and black were adjacent to each other was printed, and the color development, borderline, water resistance, water absorption, and strikethrough were evaluated based on the following indexes.

[0103] The paper base material was evaluated for four types: color development, boundary, water absorption, and strikethrough. On the other hand, with respect to the non-paper base material, the color development, the boundary line, the water resistance, and the adhesion to the base material were evaluated.

(Coloring properties) Yellow, cyan, magenta,
The color and clarity of the black solid recording print image were evaluated according to the following criteria. ：: Excellent color developability and high density △: Slight lack of color developability and color fading X: Lack of color developability, considerable density Evaluation was made by visual observation in which a decrease was observed.

(Boundary Line) The boundary line of the solid printed image of each color was visually determined using a loupe, and the degree of bleeding of the ink-jet ink was evaluated according to the following criteria. B: Slight bleeding and overlapping of borders were observed. X: Bleeding was large and the borders were unclear.

(Waterfastness) The printed sheet was immersed in water for 24 hours and then taken out. The printed surface was rubbed gently with a finger to evaluate the coating strength. : The printed image was slightly damaged. ×: The printed image was almost dropped.

(Absorptivity) Immediately after printing a solid recording print image,
Touch the recording portion with a finger and visually check whether ink adheres to the finger. The following score was given: ○: Ink does not adhere even if touched with a finger immediately after printing △: With a finger 5 seconds or more after printing Ink does not adhere even if touched. ×: Evaluation was made that ink was attached when touched with a finger immediately after printing.

(Blankthrough) Yellow, cyan, magenta,
The back side of the black solid recording print image was visually observed, and the following score was obtained: ○: almost no ink strikethrough was observed Δ: slight ink strikethrough was observed ×: ink strikethrough was observed severely .

Production Example 1 A 100 ml flask was charged with a number average molecular weight of 13,0.
100 parts of polyethylene glycol, 150 parts
Vacuum devolatilization was performed at 1.5 ° C. for 1.5 hours to remove water and active protons in the reaction system. It was 251 ppm when the water content contained in the polyethylene glycol was measured by the Karl Fischer moisture meter. Under a nitrogen stream, 0.151 parts of pyromellitic dianhydride was charged, and a chain extension reaction was carried out at 130 ° C. for 2 hours in a nitrogen stream at atmospheric pressure to obtain a high molecular weight polyether polyester (1). The resulting high molecular weight polyether polyester has a number average molecular weight of 1
It was 25,000. The acid value was 8.2 KOH mg / g of polymer.

Production Example 2- 500 parts of polyethylene glycol having a number average molecular weight of 14,000 and calcium carbonate in a 1 liter kneader.
09 parts were charged and devolatilized under reduced pressure at 130 ° C. for 2 hours to remove water and active protons in the reaction system. The amount of water contained in the polyethylene glycol was measured by a Karl Fischer moisture meter, and was found to be 97 ppm. Under a nitrogen stream, 7.86 parts of pyromellitic dianhydride was charged, and a chain extension reaction was carried out at 125 ° C. in a nitrogen stream at atmospheric pressure for 2 hours to obtain a high molecular weight polyether polyester (2). The number average molecular weight of the obtained high molecular weight polyether polyester was 151,000. When measuring the acid value, an acid treatment was performed. The acid value was 8.4 KOH mg / g of polymer.

-Comparative Production Example-To 100 parts of polyethylene glycol having a number average molecular weight of 10,000 was added 1.85 parts of dimethyl terephthalate, and
After the temperature was raised to 20 ° C., methanol was removed under a reduced pressure of 5 mmHg to obtain a high molecular weight compound (1). The number average molecular weight of the obtained high molecular weight compound is 146,000.
Met. The acid value was 0.0 KOH mg / g of polymer.

Example A1- The high-molecular-weight polyether polyester (1) obtained in Production Example 1 was diluted with ion-exchanged water as a receptor treating agent (1) to a solid content of 5%. Thus, a coating liquid (1) was obtained. 4 in a constant temperature and humidity room at 23 ° C and 65% humidity
No. 4 was added to A4 neutral PPC paper conditioned for 8 hours.
Coating liquid (1) 7.4 using 5 wire rod
g (assuming that the coating liquid was evenly coated on the neutral PPC paper, the solid content was 5.9 g / m 2
² ) Aqueous inkjet paper (1) coated with water and air-dried in a constant temperature and humidity room all day and night and treated with a coating agent (1)
I got

(Evaluation results) Color development: 、, boundary: 、, water absorption: 、, strikethrough: ○.

Example A2- 65 parts by weight of a high molecular weight polyether polyester (1) as a treating agent (1) for a receptor obtained in Production Example 1 and an acrylic emulsion (trade names: Acryset, EMN)
55 parts by weight of -210E (manufactured by Nippon Shokubai Co., Ltd., solid content: 49%) was diluted with ion-exchanged water to a solid content of 5% to obtain a coating liquid (2). Hereinafter, in the same manner as in Example A1, the aqueous ink-jet image-receiving paper (2)
Was obtained, and the color development, the boundary line, the absorbency, and the strike-through were evaluated.

(Evaluation results) Color development: 境界, boundary line: 、, water absorption: 、, strikethrough: ○.

Example A3- 70 parts by weight of a high molecular weight polyether polyester (1) as a receptor treating agent (1) obtained in Production Example 1 and starch (trade name: Oji Ace C, manufactured by Oji Cornstarch Co., Ltd.) ) 31 parts by weight of ion-exchanged water having a solid content of 5
%, To obtain a coating liquid (3).
Hereinafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (3) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation Results) Coloring: 、, boundary: 、, water absorption: 、, strikethrough: ○.

-Example A4- 71 parts by weight of a high molecular weight polyether polyester (1) as a treating agent (1) for a receptor obtained in Production Example 1 and polyvinyl alcohol (trade name: Gohsenol GL-5)
0, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was diluted with ion-exchanged water to a solid content of 5% to obtain a coating liquid (4). Hereinafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (4) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation Results) Coloring: 、, boundary: 、, water absorption: ○, strikethrough: ○.

Example A5- 70 parts by weight of a high molecular weight polyether polyester (1) as a receptor treating agent (1) obtained in Production Example 1 and an acrylic emulsion (trade name: Joncryl 790;
66 parts by weight (manufactured by Johnson Polymer Co., Ltd., solid content: 46%) was diluted with ion-exchanged water to a solid content of 5% to obtain a coating liquid (5). Hereinafter, Example A
In the same manner as in Example 1, an aqueous ink-jet image-receiving paper (5) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: 、, boundary line: 、, water absorption: 、, strikethrough: ○.

Example A6- 50 parts by weight of a high-molecular-weight polyether polyester (1) as a treating agent (1) for a receptor obtained in Production Example 1 and a styrene / butadiene rubber latex (trade name: Nip)
ol LX407K, manufactured by Zeon Corporation, solid content 50
%) Of 100 parts by weight using ion-exchanged water to a solid content of 5%.
% To obtain a coating liquid (6).
Hereinafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (6) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: 、, boundary line: 、, water absorption: 、, strikethrough: ○.

Example A7 70 parts by weight of a high molecular weight polyether polyester (1) as a treating agent for a receptor (1) obtained in Production Example 1 and a urethane emulsion (trade names: NeoRez, R-9)
60, manufactured by Zeneca Corp., solid content 33%), 100 parts by weight were diluted with ion-exchanged water so as to have a solid content of 5% to obtain a coating liquid (7). Hereinafter, Example A1
In the same manner as in (1), an aqueous ink-jet image-receiving paper (7) was obtained, and the color development, the boundary line, the absorption, and the strikethrough were evaluated.

(Evaluation results) Color development: 、, boundary line: 、, water absorption: 、, strikethrough: 。.

Example A8 The high molecular weight polyether polyester (2) obtained in Production Example 2 was diluted with ion-exchanged water as a receptor treating agent (2) so that the solid content was 5%. Thus, a coating liquid (8) was obtained. 4 in a constant temperature and humidity room at 23 ° C and 65% humidity
No. 4 was added to A4 neutral PPC paper conditioned for 8 hours.
Coating solution (8) 7.6 using 5 wire rod
g (assuming that the coating liquid is evenly coated on the neutral PPC paper, the solid content adhesion amount is 6.1 g / m 2.
² ) Aqueous inkjet paper (8) coated with water and air-dried in a constant temperature and humidity room all day and night and treated with a coating agent
I got

(Evaluation results) Color development: 、, boundary line: 、, water absorption: 、, strikethrough: ○.

Example A9 70 parts by weight of a high molecular weight polyether polyester (2) as a treating agent (2) for a receptor obtained in Production Example 2 and an acrylic emulsion (trade name: Acryset EMN)
A coating solution (9) was obtained by diluting 60 parts by weight of 210E (manufactured by Nippon Shokubai Co., Ltd., solid content: 50%) with ion-exchanged water so that the solid content became 5%. Hereinafter, Example A
In the same manner as in Example 1, an aqueous ink-jet image-receiving paper (9) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation Results) Coloring: 、, boundary: 、, water absorption: 、, strikethrough: ○.

-Example A10- 71 parts by weight of a high molecular weight polyether polyester (2) as a receptor treating agent (2) obtained in Production Example 2 and starch (trade name: Oji Ace C, manufactured by Oji Cornstarch Co., Ltd.) ) 30 parts by weight of a solid content of 5 using ion exchanged water.
% To obtain a coating liquid (10). Thereafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (10) was obtained, and the color-developing property, boundary line, absorptivity,
The strikethrough was evaluated.

(Evaluation Results) Coloring: 、, boundary: 、, water absorption: 、, strikethrough: 。.

Example A11 70 parts by weight of a high molecular weight polyether polyester (2) as a receptor treating agent (2) obtained in Production Example 2 and polyvinyl alcohol (trade name: Gohsenol GL-5)
0, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) was diluted with ion-exchanged water to a solid content of 5% to obtain a coating liquid (11). Hereinafter, in the same manner as in Example A1, a water-based inkjet image-receiving paper (11) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: 、, boundary line: 、, water absorption: 、, strikethrough: ○.

Example A12 70 parts by weight of a high molecular weight polyether polyester (2) as a treating agent for a receptor (2) obtained in Production Example 2 and an acrylic emulsion (trade name: Joncryl 790;
A coating solution (12) was obtained by diluting 65 parts by weight of Johnson Polymer Co., Ltd., solid content 47%) with ion-exchanged water so that the solid content was 5%. Hereinafter, in the same manner as in Example A1, the aqueous inkjet image-receiving paper (1
2) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: ○, boundary: 、, water absorption: 、, strikethrough: ○.

Example A13 50 parts by weight of a high molecular weight polyether polyester (2) as a treating agent for a receptor (2) obtained in Production Example 2 and a styrene / butadiene rubber latex (trade name: Nip)
ol LX407K, manufactured by Zeon Corporation, solid content 50
%) Of 100 parts by weight using ion-exchanged water to a solid content of 5%.
%, To obtain a coating liquid (13). Thereafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (13) was obtained, and the color-forming property, the boundary line, the absorptivity,
The strikethrough was evaluated.

(Evaluation results) Color development: 、, boundary: 、, water absorption: 、, strikethrough: ○.

Example A14 70 parts by weight of a high molecular weight polyether polyester (2) as a treating agent (2) for a receptor obtained in Production Example 2 and a urethane emulsion (trade name: NeoRezR-96)
0, manufactured by Zeneca Corporation, solid content 34%)
The coating liquid (14) was obtained by diluting the solid content to 5% with ion exchanged water. Hereinafter, in the same manner as in Example A1, an aqueous ink-jet image-receiving paper (14) was obtained, and the coloring property, the boundary line, the absorbency, and the strike-through were evaluated.

(Evaluation results) Color development: 、, boundary: 、, water absorption: 、, strikethrough: ○.

Comparative Example A1- Untreated neutral PPC paper was evaluated for color development, boundary line, absorption, and strikethrough in the same manner as in Example A1.

(Evaluation results) Color development: Δ, boundary: X, water absorption: 、, strikethrough: X.

Comparative Example A2- Starch (trade name: Oji Ace C, manufactured by Oji Cornstarch Co., Ltd.) was diluted with ion-exchanged water to a solid content of 5% to obtain a comparative coating solution (2). Was. Less than,
In the same manner as in Example A1, a comparative aqueous ink-jet image-receiving paper (2) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: Δ, boundary: X, water absorption: Δ, strike-through: Δ.

Comparative Example A3- Polyvinyl alcohol (trade name: Gohsenol GL-5)
0, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) using ion-exchanged water so as to have a solid content of 5% to obtain a comparative coating liquid (3). Hereinafter, in the same manner as in Example A1, a comparative aqueous ink-jet receiving paper (3) was obtained, and
The borderline, absorptivity, and strikethrough were evaluated.

(Evaluation results) Color development: △, boundary: X, water absorption: △, strikethrough: △.

Comparative Example A4- Polyethylene oxide (reagent manufactured by Aldrich: molecular weight: 200,000; acid value was 0.0 KOH mg / g of polymer) was converted to a solid content of 5% using ion-exchanged water. To obtain a comparative coating solution (4). Thereafter, in the same manner as in Example A1, a comparative aqueous ink-jet image-receiving paper (4) was obtained, and the color development, the boundary line, the absorption, and the strike-through were evaluated.

(Evaluation results) Color development: ×, boundary: ×, water absorption: Δ, strike-through: Δ.

Comparative Example A5- The high molecular weight compound (1) obtained in the Comparative Production Example was diluted with ion-exchanged water as a comparative receptor treating agent (5) so as to have a solid content of 5%. A comparative coating liquid (5) was obtained. A4 size neutral PPC paper conditioned for 48 hours in a constant temperature and humidity room at 23 ° C. and a humidity of 65% was provided with No. 7.5 g of comparative coating solution (5) using 5 wire rods
(Assuming that the coating liquid was evenly coated on the neutral PPC paper, the solid content was 6 g / m ² ), and air-dried in a constant temperature and humidity room all day and night to obtain a comparative aqueous solution treated with a coating agent. Ink-jet image-receiving paper (5) was obtained, and its color developability, boundary line, absorptivity, and strikethrough were evaluated.

(Evaluation results) Color development: Δ, boundary: Δ, water absorption: X, strikethrough: X.

Example B1- (Preparation of Coating Solution) A coating solution was prepared by using a high molecular weight polyether polyester (1) as a receptor treating agent (15) and dissolving it in methyl ethyl ketone so as to have a solid content of 10%. (15) was prepared.

(Coating on a base material) A4 size transparent polyethylene terephthalate film (Lumirror type T, thickness: 100 μm, Toray Industries, Inc.)
Co., Ltd.) with the coating liquid (15). After application using a 28 wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day.

The dried film was treated with the treating agent for receptor (1).
The central portion where 5) was uniformly adhered was cut out so as to have a size of about B5 plate, and the weight was measured. As a result, the amount of the treating agent for receptor (15) adhered was 4.4 g / m ² . Printing was performed using the full-color printer, and printing accuracy was evaluated by the evaluation method. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary: Δ, water resistance: ○.

Example B2- (Preparation of Coating Solution) 70 parts by weight of a high molecular weight polyether polyester (1) and an acrylic emulsion (trade name: Acryset EMN-210E, manufactured by Nippon Shokubai Co., Ltd., solid content: 50%) 60 parts by weight of a treating agent (16) for a receptor was added to ion-exchanged water so that the total solid content was 10%.
Mix and dissolve so that the coating solution (1
6) was prepared.

(Coating on Base Material) A coating solution (1) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 6). After application using a 28 wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day. The adhesion amount of the treating agent (16) for a receptor was 7.5 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Coloring: 、, boundary: 、, water resistance: ○.

Example B3- (Preparation of Coating Solution) A treating agent for a receptor comprising 69 parts by weight of a high molecular weight polyether polyester (1) and 28 parts by weight of starch (trade name: Oji Ace C, manufactured by Oji Cornstarch Co., Ltd.) (17) was dissolved in ion-exchanged water so that the total solid content was 5%, and the coating liquid (1) was dissolved.
7) was prepared.

(Coating on Base Material) A coating solution (1) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 7). After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night.

The adhesion amount of the treating agent (17) for the receptor was 6.3.
g / m ² . In the same manner as in Example B1,
The boundary line and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary line: 、, water resistance: ○.

Example B4- (Preparation of Coating Solution) From 70 parts by weight of a high molecular weight polyether polyester (1) and 30 parts by weight of polyvinyl alcohol (trade name: Gohsenol GL-50, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) Receptor treatment agent (18)
Was mixed and dissolved in ion-exchanged water so that the total solid content was 5%, to prepare a coating liquid (18).

(Coating on substrate) Transparent polyethylene terephthalate film (Lumirror type T, thickness:
100 µm, manufactured by Toray Industries, Inc.)
No. After application using 60 wire rod, 1 day and 2 nights
It air-dried in the constant temperature and humidity room of 3 degreeC-65% of humidity. The deposition amount of the treating agent (18) for a receptor was 8.4 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Coloring: 、, boundary: 、, water resistance: ○.

Example B5- (Preparation of Coating Solution) 70 parts by weight of a high molecular weight polyether polyester (1) and 64 parts by weight of an acrylic emulsion (trade name: Johncryl 790, manufactured by Johnson Polymer Co., Ltd., solid content 47%) Part of the treating agent for receptor (19) consisting of 3 parts by weight and mixed and dissolved in ion-exchanged water so that the total solid content is 5%, and the coating solution (19)
Was prepared.

(Coating on Base Material) A coating solution (1) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 9) is No. After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The adhesion amount of the treating agent (19) for a receptor was 8.7 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Coloring: 、, boundary: 、, water resistance: ○.

-Example B6- (Preparation of coating liquid) 50 parts by weight of high molecular weight polyether polyester (1) and styrene / butadiene rubber latex (trade name: Nipol LX407K, manufactured by Zeon Corporation, solid content: 50%) A coating solution (20) was prepared by mixing and dissolving 100 parts by weight of a treating agent for a receptor (20) in ion-exchanged water so that the total solid content was 5%.

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 0). After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The deposition amount of the treating agent (20) for a receptor was 8.3 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary line: 、, water resistance: 。.

Example B7 (Preparation of Coating Solution) 70 parts by weight of a high molecular weight polyether polyester (1) and a urethane emulsion (trade name: NeoRez R-960, manufactured by Zeneca Corporation)
(Solid content: 34%), a coating solution (21) was prepared by mixing and dissolving 100 parts by weight of a receptor treating agent (21) in ion-exchanged water so that the total solid content was 5%. .

(Coating on substrate) Transparent polyethylene terephthalate film (Lumirror type T, thickness:
100 µm, manufactured by Toray Industries, Inc.)
No. After application using 60 wire rod, 1 day and 2 nights
It air-dried in the constant temperature and humidity room of 3 degreeC-65% of humidity. The adhesion amount of the treating agent for receptor (21) was 7.5 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary line: 、, water resistance: 。.

Example B8 (Preparation of Coating Solution) A coating solution prepared by using a high molecular weight polyether polyester (2) as a treating agent (22) for a receptor and dissolving it in methyl ethyl ketone so as to have a solid content of 10%. (22) was prepared.

(Coating on a base material) A4 size transparent polyethylene terephthalate film (Lumirror type T, thickness: 100 μm, Toray Industries, Inc.)
No. 2) with the coating liquid (22). After application using a 28 wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day. The center of the dried film where the receptor treating agent (22) was uniformly adhered was cut out so as to be approximately B5 size, and the weight was measured. 4.3 g / m ² . Printing was performed using the full-color printer, and printing accuracy was evaluated by the evaluation method. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary line: Δ, water resistance: ○.

Example B9 (Preparation of Coating Solution) 70 parts by weight of a high molecular weight polyether polyester (2) and an acrylic emulsion (trade name: Acryset EMN-210E, manufactured by Nippon Shokubai Co., Ltd., solid content: 49%) 61 parts by weight of a treating agent (23) for a receptor was added to ion-exchanged water so that the total solid content was 10%.
Mix and dissolve so that the coating solution (2
3) was prepared.

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 3). After application using a 28 wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day. The adhesion amount of the treating agent for receptor (23) was 7.6 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 境界, boundary line: 、, water resistance: ○.

Example B10 (Preparation of Coating Solution) Receptor treating agent comprising 70 parts by weight of high molecular weight polyether polyester (2) and 30 parts by weight of starch (trade name: Oji Ace C, manufactured by Oji Cornstarch Co., Ltd.) (24) was dissolved in ion-exchanged water so that the total solid content was 5%, and the coating solution (2) was dissolved.
4) was prepared.

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 4) is No. After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The adhesion amount of the treating agent (24) for a receptor was 6.1 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary: 、, water resistance: ○.

Example B11 (Preparation of Coating Solution) From 70 parts by weight of a high molecular weight polyether polyester (2) and 30 parts by weight of polyvinyl alcohol (trade name: Gohsenol GL-50, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) Receptor treatment agent (25)
Was mixed and dissolved in ion-exchanged water so that the total solid content was 5%, to prepare a coating liquid (25).

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 5). After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The amount of the receptor treating agent (25) attached was 8.4 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Coloring: 、, boundary: 、, water resistance: ○.

Example B12 (Preparation of Coating Solution) 68 parts by weight of a high molecular weight polyether polyester (2) and 66 parts by weight of an acrylic emulsion (trade name: Joncryl 790, manufactured by Johnson Polymer Co., Ltd., solid content 47%) Part of the treating agent for a receptor (26) is mixed and dissolved in ion-exchanged water so that the total solid content is 5%.
Was prepared.

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 6). After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The adhesion amount of the treating agent for receptor (26) was 8.7 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Coloring: 、, boundary: 、, water resistance: ○.

Example B13 (Preparation of Coating Solution) 50 parts by weight of high molecular weight polyether polyester (2) and styrene / butadiene rubber latex (trade name: Nipol LX407K, manufactured by Zeon Corporation, solid content: 50%) A coating solution (27) was prepared by mixing and dissolving 100 parts by weight of the treating agent for a receptor (27) in ion-exchanged water so that the total solid content was 5%.

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 7). After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The adhesion amount of the treating agent for receptor (27) was 8.3 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation results) Color development: 、, boundary: 、, water resistance: ○.

Example B14 (Preparation of Coating Solution) 72 parts by weight of a high molecular weight polyether polyester (2) and a urethane emulsion (trade name: NeoRez R-960, manufactured by Zeneca Corporation)
(Solid content: 33%) was mixed and dissolved in ion-exchanged water so as to have a total solid content of 5% to prepare a coating liquid (28). .

(Coating on Base Material) A coating solution (2) was applied to a transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.).
No. 8) is No. After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The adhesion amount of the treating agent for receptor (28) was 7.7 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. Further, the adhesion to the substrate was good.

(Evaluation Results) Color development: 境界, boundary line: 、, water resistance: 。.

Comparative Example B1- Using an untreated transparent polyethylene terephthalate film, the color development, the boundary line and the water resistance were evaluated in the same manner as in Example B1.

(Evaluation Results) Color development: ×, boundary: ×, water resistance: ×.

Comparative Example B2- (Preparation of Coating Solution) Comparative Receptor Treatment Agent (12)
The comparative coating solution (12) is prepared by mixing and dissolving polyvinyl alcohol (trade name: Gohsenol GL-50, manufactured by Nippon Synthetic Chemical Industry Co., Ltd.) in ion-exchanged water so that the solid content becomes 5%. did.

(Coating on Substrate) A transparent polyethylene terephthalate film (Lumirror, type T, thickness: 100 μm, manufactured by Toray Industries, Inc.) was coated with the comparative coating solution (12) by No. 1 After application using 60 wire rod,
It was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day.
The amount of the comparative receptor treating agent (12) deposited was 7.3 g / m ^2.
Met. In the same manner as in Example B1, the coloring, the borderline,
The water resistance was evaluated.

(Evaluation results) Color development: x, boundary: x, water resistance: x.

Comparative Example B3- (Preparation of Coating Solution) Treatment Agent for Comparative Receptor (13)
A polyethylene oxide (reagent manufactured by Aldrich: molecular weight: 200,000; acid value was 0.0 KOH mg / polymer g) was mixed and dissolved in ion-exchanged water so that the solid content was 5%. Coating liquid (1
3) was prepared. (Coating on substrate) Transparent polyethylene terephthalate film (Lumirror type T,
Thickness: 100 μm, manufactured by Toray Industries, Inc.) After application using a 60-wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day and night. The amount of the comparative receptor treating agent (13) deposited was 7.2 g /
m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated. (Evaluation results) Coloring property: ×, boundary line: ×, water resistance: ×.

Comparative Example B4 (Preparation of Coating Solution) Using the high molecular weight compound (1) of the above Comparative Production Example as a treating agent (14) for a receptor, it was dissolved in methyl ethyl ketone so as to have a solid content of 10%. Thus, a comparative coating liquid (14) was prepared.

(Coating on base material) A4 size transparent polyethylene terephthalate film (Lumirror type T, thickness: 100 μm, Toray Industries, Inc.)
Co., Ltd.) with the comparative coating liquid (14). After application using a 28 wire rod, it was air-dried in a constant temperature and humidity room at 23 ° C. and a humidity of 65% for one day.

The central portion of the dried film where the comparative receptor treating agent (14) was uniformly adhered was cut out so as to be approximately B5 size, and the weight was measured. Was 4.3 g / m ² . In the same manner as in Example B1, the color development, the boundary line, and the water resistance were evaluated.

(Evaluation results) Color development: Δ, boundary: Δ, water resistance: X.

The above Examples A1 to A14 and Comparative Examples A1 to A14
From the results of A5, when the high molecular weight polyether polyester of the present invention was used as a treatment agent for an aqueous ink receiver,
Good results were obtained in all evaluations of color development, borderline, water absorption, and strikethrough.

Examples B1 to B14 and Comparative Examples B1 to B14
From the results of B4, it was better to use the high molecular weight polyether polyester of the present invention as a treatment agent for an aqueous ink receiver,
Good results were obtained in all evaluations of color development, borderline, and water resistance.

Further, since the high molecular weight polyether polyester of the present invention has a specific structure, it has an excellent balance between hydrophilicity and water resistance, and has a base (particularly paper and PET film) formed by a carboxyl group introduced in a specific amount. The coloring performance is excellent due to the adhesion to the ink and the like and the good affinity between the carboxyl group and the ink.

[0207]

The treatment agent for an aqueous ink receiver of the present invention comprises:
A treatment agent used in producing an aqueous ink receiver based on a paper-based substrate and / or a non-paper-based substrate,
Because it contains a specific structure derived from tetracarboxylic anhydride and a high-molecular-weight polyether polyester having a specific acid value as essential components, the aqueous ink absorption rate is large, the aqueous ink is less likely to bleed, and further color printing is performed. In this case, it is possible to provide a water-based ink receptor treating agent capable of producing a water-based ink receiver provided with a water-based ink receiving layer having excellent color developability of the water-based ink even when color mixing bleeding does not occur. It is also excellent in the total balance between hydrophilicity and water resistance. In addition, since it has a carboxyl group derived from a specific structure, it has excellent adhesion to the substrate and affinity with the ink.

Claims (5)

[Claims] 1. A treating agent used for producing an aqueous ink receiver based on paper and / or non-paper, obtained by subjecting polyethylene glycol to a chain extension reaction with a polyhydric anhydride. An aqueous ink receptor treating agent comprising a high molecular weight polyether polyester, wherein the acid value is 0.8 to 160. 2. The high molecular weight polyether polyester according to the following general formula (1): (Wherein, R is a divalent organic residue, Z is a tetravalent organic residue, and both X and Y are at least selected from the group consisting of a hydrogen atom, a metal atom, an ammonium group and an organic amine group. 2. The aqueous ink receiver according to claim 1, which is a polymer (I) having a number average molecular weight of 500 to 500,000 having a polyether polyester structural unit represented by the following formula (1): n = 1 to 1000. Treatment agent. 3. The aqueous receptor treating agent according to claim 1, wherein the polyhydric anhydride is a tetracarboxylic dianhydride. 4. The content of the high molecular weight polyether polyester is at least 10% by weight in terms of solid content.
4. The treating agent for an aqueous ink receiver according to any one of items 1 to 3. 5. The method according to claim 1, wherein the high molecular weight polyether polyester has an acid value of 2.0 to 80.
6. The treating agent for an aqueous ink receiver according to item 3.