JP2001277710A - Ink jet recording latex and binder composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink jet recording cationic latex, which has favorable ink absorbency, with which water resistance, light resistance and further print density of a printed matter can be highly improved and no surface strength of an ink accepting layer lowers in a higher picture quality mode ink jet printing, in which the amount of ink increases than ever, and its binder composition. SOLUTION: Under the presence of 0.5 to 10 pts.wt. of one kind or more of resins (1) selected from the group consisting of polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, polyvinylpyridine and their copolymers, by polymerizing 100 pts.wt. of a radical polymerizable monomer including a radical polymerizable monomer (A) having a tertiary amino group and/or a quaternary ammonium group in one molecule and a radical polymerizable monomer (B), which can copolymerize with the above monomer (A), the cationic latex is obtained and then the ink jet recording binder composition including the latex and an inorganic filler is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a binder composition for ink-jet recording, and more particularly, to a high-strength ink-receiving layer, a high ink-absorbing ink absorbency, a high print density, a high water resistance and a high light fastness to a printed material. And a binder composition excellent in the

[0002]

2. Description of the Related Art Ink-jet recording systems have been rapidly spreading in recent years because they can be easily made full-color, have low noise, and have excellent print quality. Water-based inks are mainly used for inkjet recording from the viewpoint of safety and recording suitability. This water-based ink is turned into fine droplets from the nozzle,
Printing is performed by flying toward the recording sheet. Therefore, the recording sheet is required to absorb the ink promptly. That is, in a recording sheet having a low ink absorbency, the ink remains on the surface of the recording sheet even after the recording is completed, leading to contamination of the apparatus and the next printed matter.

On the other hand, in order to improve the ink absorbency, the problem has been solved by using a coating agent in which a filler such as silica and a hydrophilic resin are combined in the ink receiving layer. However, in recent years, in order to make the image quality in ink jet printing more similar to photographic image quality, for example, a large amount of low-density ink is made to fly on a recording sheet finely compared to the related art. On the other hand, in addition to the conventional technology described above, although the ink absorbency is improved by further increasing the inorganic filler, increasing the inorganic filler leads to a decrease in the strength of the ink receiving layer itself, In addition, the water resistance of the printed matter is also reduced.

[0004] Further, along with the improvement of the surface strength of the ink jet recording sheet and the water resistance of the printed matter, the improvement of the durability of the printed matter has been required at the same time. This is required to prevent the print density from fading when exposed to sunlight through a window glass, although the image quality of the printed matter approaches the photographic image quality. Therefore, absorb more ink, and also maintain the water resistance of the printed matter,
There has been a demand for an ink-receiving layer having coloration properties close to photographic image quality and improving the durability of printed matter, particularly light resistance.

To solve these problems, Japanese Patent Application Laid-Open No. 62-83
JP-A-178, JP-A-8-216504 and JP-A-10-264511 disclose techniques for improving the water resistance, printability and the like of an ink jet recording sheet based on a cationic latex. However, although the water resistance of the printed matter is greatly improved, the ink absorption and surface strength required at present are not sufficient. Also, Japanese Patent Application Laid-Open No. 9-505005,
JP-A-195276 and JP-A-11-246640 disclose that a cationic latex produced using a water-soluble polymer as a part of a protective colloid is used as a coating agent for inkjet recording. It is disclosed that, for example, starch or polyvinyl alcohol is used as the water-soluble polymer. However, the combination of a cationic latex using a water-soluble polymer as a protective colloid obtained by these disclosed technologies and an inorganic filler makes it possible to achieve a high level of balance between water resistance and ink absorptivity currently required, and The strength is not sufficient, and the print density is also problematic.

[0006]

SUMMARY OF THE INVENTION According to the present invention, in ink jet printing in a high image quality mode in which the amount of ink is increased as compared with the prior art, the ink absorption is good and the water resistance and light resistance of the printed matter are improved. It is another object of the present invention to provide a cationic latex for ink jet recording, which can highly improve the print density and does not lower the surface strength of the ink receiving layer, and a binder composition thereof.

[0007]

Means for Solving the Problems In order to solve the above-mentioned problems, the present inventor has proposed a method for preparing a cationic latex obtained by polymerizing a cationic radical polymerizable monomer in the presence of a specific resin to form an ink receiving layer for ink jet recording. The present inventors have found that the above problems can be solved by using the present invention, and have accomplished the present invention. That is, a first aspect of the present invention is that, in the presence of 0.5 to 10 parts by weight of one or more resins (1) selected from polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, polyvinylpyridine, and a copolymer thereof, 100 parts by weight of a radical polymerizable monomer composition containing a radical polymerizable monomer (A) having a tertiary amino group and / or a quaternary ammonium group and a radical polymerizable monomer (B) copolymerizable therewith is polymerized. A cationic latex for ink jet recording, characterized by containing a copolymer (a) obtained by the above method.

A second aspect of the invention is a multilayer latex in which the cationic latex has a core portion and a shell portion, wherein the shell portion contains the copolymer (a), the core portion is a nonionic radical polymerizable monomer, and The cationic latex for inkjet recording according to the first aspect of the invention, which comprises a copolymer (b) obtained by polymerizing a radical polymerizable monomer composition containing a crosslinkable radical polymerizable monomer. A third aspect of the invention is the cationic latex for inkjet recording according to the second aspect of the invention, wherein the radical polymerizable monomer composition containing the monomer (B) contains at least (meth) acrylamide.

A fourth aspect of the invention is a binder composition for ink jet recording, comprising the cationic latex according to any one of the first to third aspects of the invention and an inorganic filler. A fifth aspect of the invention is the binder composition for inkjet recording according to the fourth aspect, wherein the inorganic filler is amorphous synthetic silica. Hereinafter, the present invention will be described in detail.

The resin (1) used in the present invention is at least one resin selected from polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, polyvinylpyridine, and a copolymer thereof. Polyvinylpyrrolidone,
Polyacrylamide, polyethyleneimine, and polyvinylpyridine are obtained by polymerizing the corresponding monomers. In addition, copolymers corresponding to them can be obtained by copolymerizing each of the monomers with other monomers copolymerizable with the monomers, as long as the effects of the present invention are not impaired. Preferably, the copolymer contains at least 40% by weight of each of the corresponding monomer structural units. The copolymerization may be alternating, random, block, or the like.

By using the resin (1) selected from these, the print density, water resistance and light resistance of the printed matter are improved. It is preferably at least one resin (1) selected from polyvinylpyrrolidone, polyacrylamide, and copolymers thereof. The amount of the resin (1) used is 0.1 to 100 parts by weight of the radical polymerizable monomer composition described later.
It is 5 to 10 parts by weight. At 0.5 parts by weight or more, there is no problem in light fastness of the printed matter, and at 10 parts by weight or less, there is no problem in water resistance. Preferably it is 1 to 5 parts by weight.

The resin (1) may be partially or completely quaternized as required. The method of quaternization is not particularly limited, and may be, for example, quaternization using an inorganic acid or an organic acid, or using an alkyl halide (for example, methyl chloride, ethyl chloride, propyl chloride, butyl chloride, benzyl chloride and the like). It may be quaternized. The timing of charging the resin (1) to the polymerization system is not particularly limited. For example, the resin (1) may be charged all at once in the early stage of polymerization, or may be continuously or discontinuously charged during polymerization.

[0013] In addition to the resin (1) used in the present invention, if necessary, other resins may be used in combination as long as the effects of the present invention are not impaired. As other resins, for example, polyvinyl alcohols, cellulosic resins, starches, glycols, polyvinyl ether, gelatin, caseins,
Examples thereof include cyclodextrins, chitin, chitosan, and aqueous nitrified cotton. The polyvinyl alcohol may be completely saponified or partially saponified.

Examples of the monomer (A) used in the present invention include various radically polymerizable monomers having a tertiary amino group or a base thereof, and a quaternary ammonium base or a quaternary ammonium base. Various radically polymerizable monomers can be used.

For example, di C _1-4 alkylamino-C _2-3 alkyl (meth) acrylamide or a salt thereof [dimethylaminoethyl (meth) acrylamide, diethylaminoethyl (meth) acrylamide, dimethylaminopropyl (meth) acrylamide, diethylamino Propyl (meth) acrylamide or a salt thereof], di C _1-4 alkylamino-C _2-3 alkyl (meth) acrylate or a salt thereof [dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate, dimethylamino Propyl (meth) acrylate, diethylaminopropyl (meth) acrylate or salts thereof], di-C _1-4 alkylamino-C _2-3 alkyl-substituted aromatic vinyl or a salt thereof [4- (2-dimethylaminoethyl) ) Styrene, 4- (2- Such as dimethylaminopropyl) styrene and salts thereof, and a nitrogen-containing heterocyclic radically polymerizable monomer or a salt thereof [vinylpyridine, vinylimidazole, vinylpyrrolidone or a salt thereof, etc.]. Salts include hydrohalides (hydrochlorides, hydrobromides, etc.), alkyl halides (methyl chloride, ethyl chloride, propyl chloride, butyl chloride, benzyl chloride, epichlorohydrin, methyl bromide, ethyl bromide, Propyl bromide, butyl bromide, etc.), sulfate, alkyl sulfate (methyl sulfate, ethyl sulfate, etc.), alkyl sulfonate, aryl sulfonate,
Carboxylate (formate, acetate, etc.);

Preferably, di C _1-4 alkylamino-C
_2-3 alkyl (meth) acrylamide or a salt thereof, di C
_1-4 alkylamino-C _2-3 alkyl (meth) acrylate or a salt thereof. The monomer (B) used in the present invention includes, for example, aromatic unsaturated compounds, α, β-unsaturated monocarboxylic acid alkyl esters, amide group-containing monomers, unsaturated carboxylic acids and the like.

Examples of the aromatic unsaturated compound include styrene, α-methylstyrene, vinyltoluene and the like. Examples of the alkyl esters of α, β-unsaturated monocarboxylic acids include alkyl esters of acrylic acid or methacrylic acid. Examples of the alkyl ester of acrylic acid or methacrylic acid include methyl acrylate, ethyl acrylate, propyl acrylate, isopropyl acrylate, butyl acrylate, isobutyl acrylate, hexyl acrylate, cyclohexyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, methyl methacrylate, and ethyl methacrylate. Propyl methacrylate, isopropyl acrylate, butyl methacrylate, isobutyl methacrylate, hexyl methacrylate, cyclohexyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, and the like.

Examples of the amide group-containing monomer include:
Acrylamide, methacrylamide (both monomers may be referred to as (meth) acrylamide),
N, N-methylenebisacrylamide, diacetone acrylamide, maleic amide, maleimide and the like can be mentioned. Examples of the unsaturated carboxylic acid include acrylic acid, methacrylic acid, maleic acid, fumaric acid, itaconic acid, and monoalkyl itaconate.

Radical polymerizable monomers other than those described above may be combined as needed. For example, a hydroxyl group-containing monomer such as 2-hydroxyethyl acrylate, 2
-Hydroxyethyl methacrylate, hydroxypropyl acrylate, hydroxypropyl methacrylate,
Polyethylene glycol acrylate; and the like. Preferred monomers (B) are aromatic unsaturated compounds, α, β-unsaturated monocarboxylic acid alkyl esters, amide group-containing monomers, and hydroxyl group-containing monomers.

The ratio of the monomer (A) to the monomer (B) is such that the monomer (A) is 5 to 60% by weight, the monomer (B)
Is 40 to 95% by weight. 5% by weight of monomer (A)
As described above, there is no problem in color development, and when it is 60% by weight or less, there is no problem in water resistance of the printed matter. Preferably, the monomer (A) is 1
0 to 50% by weight, and the monomer (B) is 50 to 90% by weight. For the polymerization of the present invention, for example, emulsion polymerization can be used. The method of emulsion polymerization is not particularly limited, and a conventionally known method can be applied. For example, the radical polymerizable monomer is polymerized in an aqueous medium in the presence of a radical polymerizable monomer, a radical polymerization initiator, a surfactant, a chain transfer agent as needed, and other additives.

The radical polymerization initiator used in the polymerization is
Known persulfates, peroxides, water-soluble azobis compounds,
A redox system of a peroxide-reducing agent can be used. Preferred is a polymerization initiator that provides a cationic terminal. The following can be used as a polymerization initiator for providing a cationic terminal. For example, 2,2′-azobis (2-amidinopropane) dihydrochloride, 2,2′-azobis (N,
N'-dimethyleneisobutylamidine) dihydrochloride, 2,
2'-azobis (2-methylbutanamide oxime) 2
Hydrochloride tetrahydrate and the like.

In addition to the above, the following initiators are used as required. Examples of the persulfate include ammonium persulfate, potassium persulfate, and sodium persulfate, and examples of the peroxide include hydrogen peroxide, t-butyl hydroperoxide, t-butylperoxymaleic acid, and succinic peroxide. Examples of the water-soluble azobis compound include 2,2′-azobis (N-hydroxyethylisobutylamide) and 4,4′-azobis (4-cyanopentanoic acid).

The redox system of the peroxide-reducing agent includes, for example, sodium sulfooxylate formaldehyde, sodium bisulfite, sodium thiosulfate, sodium hydroxymethanesulfinate, L-ascorbic acid and salts thereof in the above peroxide. , Cuprous salts, ferrous salts and the like. Examples of the oil-soluble polymerization initiator include peroxides, oil-soluble azobis compounds and the like, and examples of the peroxide include dibutyl peroxide, benzoyl peroxide, lauroyl peroxide, cumene hydroperoxide and the like. Examples of the oil-soluble azobis compound include, for example, 2,2′-azobisisobutyronitrile, 2,2′-azobis-2-methylbutyronitrile,
2,2′-azobis-2,4-dimethylvaleronitrile and the like.

The following are examples of the cationic surfactant. For example, a quaternary ammonium type, an aliphatic amine type, and a heterocyclic amine type are exemplified. Examples of the quaternary ammonium type include a long-chain primary amine salt, a dialkyldimethylammonium salt, a long-chain tertiary amine salt, Examples thereof include alkyltrimethylammonium salts and alkylpyridinium salts, examples of the aliphatic amine type include polyoxyethylene alkylamines, and examples of the heterocyclic amine type include alkylimidazoline.

The nonionic surfactant includes, for example, ether type, ester type, alkanolamide type and the like, and the ether type includes, for example, polyoxyethylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene alkyl thioether and the like. Examples of the ester type include polyoxyethylene monofatty acid ester, polyoxyethylene difatty acid ester, polyoxyethylene propylene glycol fatty acid ester, polyoxyethylene sorbitan monofatty acid ester, glycerin monofatty acid ester, and sucrose fatty acid ester. Examples of the alkanolamide type include fatty acid diethanolamide, polyoxyethylene alkylamide and the like.

In addition to these, if necessary, anionic and amphoteric surfactants may be used. Examples of the anionic surfactant include a carboxylic acid type, a sulfate type, a sulfonic acid type, and a phosphate type.
Examples of the amphoteric surfactant include an N-alkyl amino acid type and an imidazoline type.

A reactive surfactant may be used in combination with the non-reactive surfactant described above. The reactive surfactant has a functional group of a radical polymerizable double bond in one molecule and has a polyoxyethylene, polyoxypropylene, polyoxyethylene polyoxypropylene composite type alkyl ether or alcohol. Further, those having a radically polymerizable double bond in one molecule and having at least one functional group selected from sulfonic acid groups, sulfonic acid ester groups, sulfonic acid groups, and sulfonic acid ester bases (the salt and Represents a sodium salt, a potassium salt, or an ammonium salt).

The cationic latex of the present invention preferably has a glass transition temperature of -40 to 60 ° C. There is no problem in water resistance at -40 ° C or higher, and no problem in surface strength at 60 ° C or lower.
More preferably, it is -30 to 40C. The particle size of the cationic latex is from 10 nm to 500 nm. 10
No problem in latex production at 500 nm or more, 500 nm
There is no problem in the stability of the compound below. Preferably 50n
m to 300 nm.

In the present invention, the cationic latex is
A multi-layered cationic latex having a core and a shell may be used. For example, a cationic latex in which the shell portion contains the copolymer (a) and the core portion contains the copolymer (b) is preferable. The monomer (B) of the copolymer (a) contained in the shell part is the above-mentioned aromatic unsaturated compound, α, β
-Unsaturated monocarboxylic acid alkyl esters, hydroxyl group-containing monomers and amide group-containing monomers. Preferably, an amide group-containing monomer is used in terms of light resistance and printing density, and it is particularly preferable to contain (meth) acrylamide.

The nonionic radically polymerizable monomer of the copolymer (b) contained in the core portion includes, for example, the above-mentioned aromatic unsaturated compounds, α, β-unsaturated monocarboxylic acid alkyl esters, hydroxyl groups Monomers, amide group-containing monomers, and the like. Preferred nonionic radical polymerizable monomers are α, β-unsaturated monocarboxylic acid alkyl esters and hydroxyl group-containing monomers.

The crosslinkable radically polymerizable monomer of the copolymer (b) is a functional group having two or more radically polymerizable double bonds or a functional group which gives a self-crosslinked structure after polymerization during or after polymerization. Is a radical polymerizable monomer having Radical polymerizable monomers having two or more radical polymerizable double bonds are, for example, divinylbenzene,
Polyoxyethylene diacrylate, polyoxyethylene dimethacrylate, polyoxypropylene diacrylate, polyoxypropylene dimethacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, butanediol diacrylate, butanediol dimethacrylate, trimethylolpropanetri Examples include acrylate, trimethylolpropane trimethacrylate, pentaerythritol tetraacrylate, and pentaerythritol tetramethacrylate.

During the polymerization, examples of the radical polymerizable monomer having a functional group that gives a crosslinked structure after the polymerization include, for example,
Epoxy group-containing monomers such as glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, methyl glycidyl acrylate, methyl glycidyl methacrylate, and methylol group-containing monomers such as N-methylol acrylamide, N-methylol methacrylamide, dimethylol acrylamide, dimethylol methacrylamide, etc. , Alkoxymethyl group-containing monomers such as N-methoxymethylacrylamide, N-methoxymethylmethacrylamide, N-butoxymethylacrylamide, N-butoxymethylmethacrylamide, etc., hydroxyl group-containing monomers, silyl group-containing monomers such as vinyltrichlorosilane, vinyl Trimethoxysilane, vinyltriethoxysilane, tris-2-methoxyethoxyvinyl Orchids, .gamma.-methacryloxypropyl trimethoxysilane, .gamma.-methacryloxypropyl methyl dimethoxy silane, and the like.

Preferred crosslinkable radical polymerizable monomers are trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, and silyl group-containing radical polymerizable monomers. Particularly preferred is a silyl group-containing radical polymerizable monomer. The ratio of the nonionic radical polymerizable monomer to the crosslinkable radical polymerizable monomer is such that the ratio of the nonionic radical polymerizable monomer is 90 to 9
9.95% by weight, and the crosslinkable radical polymerizable monomer is 0.05 to 10% by weight. When the crosslinkable radical polymerizable monomer is 0.05% by weight or more, there is no problem in color development,
There is no problem in polymerizability at 10% by weight or less. Preferably, the nonionic radical polymerizable monomer is 95 to 99.9% by weight, and the crosslinkable radical polymerizable monomer is 0.1 to 5% by weight.

As the polymerization method, for example, the copolymer (a)
Is polymerized, and then the copolymer (b) is added in the presence of the copolymer (a).
Or a method of polymerizing the copolymer (b) and then polymerizing the copolymer (a) in the presence of the copolymer (b). Preferably, after the copolymer (a) is polymerized, the copolymer (b) is polymerized in the presence of the copolymer (a). In the case of the cationic latex having a multilayer structure having a core portion and a shell portion according to the present invention, the copolymer (a) contains a monomer (A) and a monomer (B), and is made more hydrophilic than the copolymer (b). Therefore, more copolymer (a) exists on the shell side.

The ratio of copolymer (a) to copolymer (b) is
For example, 10 to 90% by weight of the copolymer (a) and 90 to 10% by weight of the copolymer (b) are preferable. Copolymer (a)
Is 10% by weight or more, there is no problem in color development, and 90% by weight or less, there is no problem in water resistance of printed matter. In the case of the cationic latex having a multilayer structure having a core portion and a shell portion according to the present invention, the relationship between the core Tg1 and the shell Tg2 is Tg1 ≦ Tg.
2 or Tg1> Tg2. Preferably, Tg1> Tg2. The core side Tg1 is preferably 10 to 60C, and the shell side Tg2 is preferably -30 to 20C.

The inorganic filler used in the present invention is synthetic silica, alumina, calcium carbonate, magnesium carbonate, zinc carbonate, magnesium oxide, titanium oxide, zinc oxide, aluminum oxide, barium sulfate, satin white, lithopone, kaolin, aluminum silicate. , Magnesium silicate, aluminum hydroxide, clay, calcined clay, diatomaceous earth, synthetic zeolite, smectite, layered inorganic polymer and the like. Calcium carbonate and synthetic silica are preferred from the viewpoints of ink absorption and color development, and more preferably amorphous synthetic silica.

The amount of the inorganic filler to be added is 10 to 500 parts by weight based on 100 parts by weight (solid content) of the cationic latex. When the amount of the inorganic filler is 10 parts by weight or more, there is no problem in color development, ink absorption, and bleeding property, and when the amount is 500 parts by weight or less, there is no problem in water resistance. It is preferably 50 to 400 parts by weight based on 100 parts by weight (solid content) of the cationic latex. The cationic latex of the present invention, and the composition thereof, if necessary, a surfactant, a silane coupling agent, a dispersant, a preservative, an antifoaming agent, a thickener, a solvent, a crosslinking agent,
A water-soluble metal compound or the like may be added.

As the surfactant, in addition to the surfactants mentioned above, for example, sulfosuccinic surfactants, silicone surfactants and the like can be mentioned. The silicone-based surfactant referred to here is a water-soluble compound in which a hydrophobic portion is made of a silicone resin and a hydrophilic group is introduced into a terminal and / or a side chain of the silicone resin. The silane coupling agent referred to here is, for example, a compound having two or more different functional groups in one molecule, one is an alkoxysilyl group, and the other is, for example, an amino group, an epoxy group, a vinyl group. And so on.

Further, water-soluble metal compounds include, for example, chlorides, sulfates, other formate, acetate such as calcium ion, magnesium ion, aluminum ion, zinc ion, iron ion, titanium ion, zirconium ion and barium ion. And the like, and one or more selected from these are used. The amount of the water-soluble metal compound to be added is 0.1 mmol to 100 mmol per 100 g of the inorganic filler. 0.1m
If it is at least 100 mol, the light resistance will be good, and if it is at most 100 mmol, there will be no problem in absorbency and bleeding. Preferably 0.5m
mol to 50 mmol.

The following materials may be further compounded in the binder composition of the present invention, if necessary. For example, a water-soluble quaternary ammonium salt oligomer can be used.
Examples of the water-soluble quaternary ammonium salt oligomer include polyethyleneimine salts, dimethylamine epihalohydrin condensates, polyvinylamine salts, polyallylamine salts, polydimethylaminoethyl methacrylate quaternary salts,
Examples thereof include a polydiallyldimethylammonium salt, a salt of a diallylamine acrylamide copolymer, and a quaternary ammonium salt of polystyrene.

The cationic latex and binder composition of the present invention are used, for example, in the following support. Examples of the support include paper, synthetic paper, plastic paper, film, metal plate, metal foil, and plastic film on which aluminum or the like is deposited. The ink receiving layer comprising the cationic latex and the binder composition of the present invention may be applied directly on a support, or may have a multi-layer structure as required. For example, an anchor layer may be provided below the ink receiving layer, and a gloss layer may be provided above the ink receiving layer.

The method for applying the ink receiving layer comprising the cationic latex and binder composition of the present invention is not limited. For example, general coaters such as a roll coater, an air knife coater, a blade coater, a rod blade coater, a curtain coater, a bar coater, a die coater, and a gravure coater can be used. The ink receiving layer comprising the cationic latex and the binder composition of the present invention may be applied to a support at 1 to 50 g / m ² .
If it is 1 g / m ² or more, there is no problem in color development, and if it is 50 g / m ² or less, there is no problem in water resistance. Preferably it is 3 to 30 g / m ² .

The ink-receiving layer comprising the cationic latex and the binder composition of the present invention was coated on a support for 8 hours.
It can be obtained by drying at 0 to 160 ° C. for 5 to 300 seconds.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but they do not limit the scope of the present invention. Unless otherwise specified, it is based on weight. The evaluation of various physical properties in the present invention is as follows. (1) Ink Color Development (Print Density) Solid printing of black, cyan, magenta, and yellow was performed on an inkjet recording sheet by an inkjet color printer (PM-750C; manufactured by Epson Corporation). When printing, set the paper, paper: photo print paper,
Ink: color, mode: recommended setting of "clean". The print density of solid printing is measured using a Macbeth densitometer (RD-9).
18; manufactured by Sakata Inx Co., Ltd.).

(2) Ink Absorption Immediately after the solid printing of (1), the printed surface was rubbed with a finger and the state was visually observed. The evaluation criteria are as follows. : No ink adhered to finger. Δ: Ink is slightly attached to the finger. ×: Adhesion of ink to fingers was observed. △ or more was considered as a pass.

(3) Bleeding property Bleeding between the boundaries of solid printing of cyan, magenta, and yellow was visually observed. The evaluation criteria are as follows. 〇: No blurring. Δ: There is no blur of 0.5 mm or more at the boundary.

×: Bleed of 0.5 mm or more at the boundary. △ or more was considered as a pass.

(4) Water Resistance The solid printed matter was immersed in running water for 5 minutes, and then the printed surface was rubbed lightly and reciprocally with a finger three times in running water to visually observe changes in the printing state. The evaluation criteria are as follows. 〇: No ink leakage. Δ: Slight outflow of ink ×: Outflow of ink is observed in all colors. △ or more was considered as a pass.

(5) Surface Strength The surface of the ink jet recording sheet was rubbed with a finger, and the state was visually observed.

The evaluation criteria are as follows. 〇: No pigment transfer to finger. Δ: Pigment slightly transferred to finger ×: Pigment transferred to finger △ or more was considered as a pass.

(6) Light Resistance Test A solid printed matter left at room temperature for 1 hour after printing was used. The test temperature was set to 62 ° C using an ultraviolet long life fade meter FAL-3 manufactured by Suga Test Instruments as a test device.
Irradiation was performed for 0 hours. The black ink density before and after the irradiation of the solid printing portion was compared, and the value obtained by dividing the ink density after the irradiation by the ink density before the irradiation was evaluated as a residual ratio. (7) Particle size: measured by a light scattering method. The number average particle size was adopted. (8) Glass transition temperature (Tg): Measured by DSC. The heating rate was 10 ° C./min, and the inflection point was Tg.

Next, a production example of a cationic latex is shown below.

[0053]

[Production Example 1] 430 parts of distilled water and 25% aqueous solution of dodecyltrimethylammonium chloride 80 in a flask equipped with a stirrer
Part, Coralal VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan Co., Ltd.) 10% aqueous solution 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,
2'-azobis (2-amidinopropane) dihydrochloride 5%
48 parts of an aqueous solution, 186 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl salt 12
0 parts, 200 parts of methyl methacrylate, 320 parts of butyl acrylate, and 160 parts of styrene are separately charged over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 150 nm. Tg was 16 ° C.

[0055]

Production Example 2 590 parts of distilled water and 25% aqueous solution of dodecyltrimethylammonium chloride in a flask equipped with a stirrer 80
Part, 10% aqueous solution of choral VL (polyvinylpyrrolidone copolymer, manufactured by BSF Japan) 24
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,
2'-azobis (2-amidinopropane) dihydrochloride 5%
48 parts of an aqueous solution, 186 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl salt 12
0 parts, 200 parts of methyl methacrylate, 320 parts of butyl acrylate, and 160 parts of styrene are separately charged over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 140 nm.

[0057]

[Production Example 3] In a flask equipped with a stirrer, 590 parts of distilled water, 25% aqueous solution of dodecyltrimethylammonium chloride 80%
80 parts of a 10% aqueous solution of Sanfloc C009P (polyacrylamide, manufactured by Sanyo Chemical Industries, Ltd.)
C., and 40 parts of a 5% aqueous solution of 2,2'-azobis (2-amidinopropane) dihydrochloride are added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2'-azobis (2-
Amidinopropane) dihydrochloride 5% aqueous solution 48 parts, distilled water 186 parts aqueous solution part, dimethylaminopropylacrylamide methyl chloride 120 parts, methyl methacrylate 200 parts, butyl acrylate 320 parts, styrene 160 parts styrene monomer part Charge separately over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is reduced to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 121 nm.

[0059]

Production Example 4 750 parts of distilled water and 25% aqueous solution of dodecyltrimethylammonium chloride in a flask equipped with a stirrer 80
And 80 parts of a 10% aqueous solution of Sanfloc C009P (polyacrylamide, manufactured by Sanyo Chemical Industries, Ltd.) at 80 ° C.
, And 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2'-azobis (2-
Amidinopropane) dihydrochloride 5% aqueous solution 48 parts, distilled water 186 parts aqueous solution part, dimethylaminopropylacrylamide methyl chloride 120 parts, methyl methacrylate 200 parts, butyl acrylate 320 parts, styrene 160 parts styrene monomer part Charge separately over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 116 nm.

[0061]

[Production Example 5] In a flask equipped with a stirrer, 590 parts of distilled water, 25% aqueous solution of dodecyltrimethylammonium chloride 80%
80 parts of a 10% aqueous solution of Sanfloc C009P (polyacrylamide, manufactured by Sanyo Chemical Industries, Ltd.)
C., and 40 parts of a 5% aqueous solution of 2,2'-azobis (2-amidinopropane) dihydrochloride are added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2'-azobis (2-
Amidinopropane) dihydrochloride 5% aqueous solution 48 parts, an aqueous solution part composed of 186 parts of distilled water, and a monomer part composed of 200 parts of dimethylaminopropylacrylamide methyl chloride chloride, 200 parts of methyl methacrylate, 320 parts of butyl acrylate, and 80 parts of styrene. Charge separately over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is cooled to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 123 nm. Tg was 15 ° C.

[0063]

Production Example 6 830 parts of distilled water and 25% aqueous solution of dodecyltrimethylammonium chloride 80 in a flask equipped with a stirrer
And heated to 80 ° C., and 2,2′-azobis (2
-Amidinopropane) dihydrochloride 40 parts of a 5% aqueous solution are added. Leave for 5 minutes after addition. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2 ′
-Aqueous solution consisting of 48 parts of 5% aqueous solution of azobis (2-amidinopropane) dihydrochloride, 186 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl salt 120
Parts, 200 parts of methyl methacrylate, 320 parts of butyl acrylate, and 160 parts of styrene are separately charged over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 257 nm.

[0065]

[Production Example 7] In a flask equipped with a stirrer, 80 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, choracral V
L (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan Co., Ltd.)
The temperature is raised to 0 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. 5 after addition
Leave for a minute. After 5 minutes, 16 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2′-azobis (2
-Amidinopropane) 48 parts of a 5% aqueous solution of dihydrochloride and 186 parts of distilled water, and 120 parts of dimethylaminopropylacrylamide methyl chloride, 200 parts of methyl methacrylate, 320 parts of butyl acrylate and 160 parts of styrene Are separately charged over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 403 nm.

[0067]

Production Example 8 430 parts of distilled water and a 25% aqueous solution of dodecyltrimethylammonium chloride in a flask equipped with a stirrer
Parts, PVA117 (polyvinyl alcohol, manufactured by Kuraray Co., Ltd.) 10% aqueous solution 400 parts were charged, and the temperature was raised to 80 ° C.
40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride are added. Leave for 5 minutes after addition. 5
Minutes later, 25% of dodecyltrimethylammonium chloride
16 parts of an aqueous solution, 48 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 186 parts of distilled water, 120 parts of dimethylaminopropylacrylamide methyl chloride chloride, 200 parts of methyl methacrylate
Parts, 320 parts of butyl acrylate and 160 parts of styrene are separately charged over 90 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 122 nm.

[0069]

Production Example 9 430 parts of distilled water and 25% aqueous solution of dodecyltrimethylammonium chloride in a flask equipped with a stirrer
Part, Coralal VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan Co., Ltd.) 10% aqueous solution 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2, 2 ′
-Azobis (2-amidinopropane) dihydrochloride 5% aqueous solution 24 parts, an aqueous solution part comprising 83 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl chloride 100 parts,
100 parts of methyl methacrylate, butyl acrylate 1
20 parts and a monomer part for a shell part composed of 80 parts of styrene are separately charged over 50 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride salt, 24 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water
Aqueous solution part consisting of
A monomer part for a core part comprising 240 parts of butyl acrylate, 72 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 50 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 122 nm.

[0072]

[Production Example 10] 470 parts of distilled water was placed in a flask equipped with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, 10% aqueous solution of choracral VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan) 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 5 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2, 2 ′
-An aqueous solution consisting of 15 parts of a 5% aqueous solution of azobis (2-amidinopropane) dihydrochloride, 50 parts of distilled water, and 100 parts of dimethylaminopropylacrylamide methyl chloride;
35 parts of methyl methacrylate, 70 of butyl acrylate
Parts and 35 parts of styrene are separately charged over 30 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 11 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 33 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 1 part of an aqueous solution of distilled water,
Aqueous solution consisting of 16 parts and methyl methacrylate 10
0 parts, butyl acrylate 360 parts, styrene 92 parts,
The monomer part for the core part composed of 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 70 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 120 nm. Core part Tg21
° C and the shell part was Tg-9 ° C.

[0075]

[Production Example 11] 470 parts of distilled water was placed in a flask equipped with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, 10% aqueous solution of choracral VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan) 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 11 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,
2'-azobis (2-amidinopropane) dihydrochloride 5%
33 parts of an aqueous solution and 116 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl salt 10
0 parts, 140 parts of methyl methacrylate, 200 parts of butyl acrylate, and 120 parts of styrene are separately charged over 70 minutes. After input, 30
Stirring was continued for minutes.

Next, 5 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride salt, 15 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 50 parts of distilled water,
Aqueous solution consisting of 50 parts of methyl methacrylate,
A monomer part for a core part consisting of 150 parts of butyl acrylate, 32 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 30 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 135 nm.

[0078]

Production Example 12 470 parts of distilled water was placed in a flask equipped with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, 10% aqueous solution of choracral VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan) 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2, 2 ′
-Azobis (2-amidinopropane) dihydrochloride 5% aqueous solution 24 parts, an aqueous solution part comprising 83 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl chloride 100 parts,
120 parts of methyl methacrylate, butyl acrylate 8
0 parts and 100 parts of styrene are separately charged over 50 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water
Aqueous solution part consisting of
A monomer part for a core part comprising 240 parts of butyl acrylate, 72 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 50 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is cooled to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 118 nm. Core part Tg44
℃, the shell part Tg -3 ℃.

[0081]

Production Example 13 470 parts of distilled water was placed in a flask equipped with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, 10% aqueous solution of choracral VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan) 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2, 2 ′
-Azobis (2-amidinopropane) dihydrochloride 5% aqueous solution 24 parts, an aqueous solution part comprising 83 parts of distilled water, and dimethylaminopropylacrylamide chloride methyl chloride 100 parts,
100 parts of methyl methacrylate, butyl acrylate 1
20 parts and a monomer part for a shell part composed of 80 parts of styrene are separately charged over 50 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water,
Aqueous solution part consisting of
A monomer part for a core part comprising 280 parts of butyl acrylate, 32 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 50 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is cooled to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 125 nm. Core part Tg26
And the shell part Tg-17 ° C.

[0084]

[Production Example 14] A flask equipped with a stirrer was charged with 590 parts of distilled water.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, Sanfloc C009P (polyacrylamide,
Charge 10 parts aqueous solution (240 parts), 8
The temperature is raised to 0 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. 5 after addition
Leave for a minute. After 5 minutes, 11 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2,2′-azobis (2-
Amidinopropane) dihydrochloride 5% aqueous solution 33 parts, aqueous solution part consisting of 116 parts of distilled water, and shell part consisting of dimethylaminopropylacrylamide methyl chloride 100 parts, methyl methacrylate 140 parts, butyl acrylate 200 parts, styrene 120 parts Separate the monomer parts to 70
Charge over a minute. After the introduction, stirring was continued for 30 minutes.

Next, 5 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride salt, 15 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 50 parts of distilled water,
Aqueous solution consisting of 50 parts of methyl methacrylate,
A monomer part for a core part consisting of 150 parts of butyl acrylate, 32 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 30 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 126 nm.

[0087]

[Production Example 15] 470 parts of distilled water was placed in a flask with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, 10% aqueous solution of choracral VL (polyvinylpyrrolidone-based copolymer, manufactured by BSF Japan) 40
0 parts are charged, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added. Leave for 5 minutes after addition. After 5 minutes, 5 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 2, 2 ′
-An aqueous solution consisting of 15 parts of a 5% aqueous solution of azobis (2-amidinopropane) dihydrochloride, 50 parts of distilled water, and 100 parts of dimethylaminopropylacrylamide methyl chloride;
A monomer part for a shell part composed of 70 parts of acrylamide and 70 parts of butyl acrylate is separately charged over 30 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 11 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 33 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 1 part of an aqueous solution of distilled water,
Aqueous solution consisting of 16 parts and methyl methacrylate 10
0 parts, butyl acrylate 360 parts, styrene 92 parts,
The monomer part for the core part composed of 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 70 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is cooled to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 123 nm.

[0090]

Production Example 16 830 parts of distilled water was placed in a flask equipped with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, the temperature is raised to 80 ° C., and 40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride is added.
Leave for 5 minutes after addition. After 5 minutes, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride,
Separately, an aqueous solution part composed of 83 parts of distilled water and a monomer part for a shell part composed of 100 parts of dimethylaminopropylacrylamide methyl chloride, 100 parts of methyl methacrylate, 120 parts of butyl acrylate, and 80 parts of styrene were separately prepared.
Charge over 0 minutes. After the introduction, stirring was continued for 30 minutes.

Next, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water,
Aqueous solution part consisting of
A monomer part for a core part comprising 240 parts of butyl acrylate, 72 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 50 minutes. After the introduction, stirring was continued for 60 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 239 nm.

[0093]

[Production Example 17] 430 parts of distilled water was placed in a flask with a stirrer.
Dodecyltrimethylammonium chloride 25% aqueous solution 8
0 parts, and 400 parts of a 10% aqueous solution of PVA117 (polyvinyl alcohol, manufactured by Kuraray Co., Ltd.), and the temperature was raised to 80 ° C.
40 parts of a 5% aqueous solution of 2,2′-azobis (2-amidinopropane) dihydrochloride are added. Leave for 5 minutes after addition. 5
After minutes, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2'-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water, and dimethylaminopropylacrylamide chloride 100 parts of methyl salt, 100 parts of methyl methacrylate,
A monomer part consisting of 120 parts of butyl acrylate, 72 parts of styrene and 8 parts of γ-methacryloxypropyltrimethoxysilane is separately charged over 50 minutes. After input, 3
Stirring was continued for 0 minutes.

Next, 8 parts of a 25% aqueous solution of dodecyltrimethylammonium chloride, 24 parts of a 5% aqueous solution of 2,2'-azobis (2-amidinopropane) dihydrochloride, 83 parts of distilled water
Aqueous solution part consisting of
A monomer part consisting of 240 parts of butyl acrylate and 80 parts of styrene is separately charged over 50 minutes. After input, 6
Stirring was continued for 0 minutes.

Thereafter, the temperature is lowered to 30 ° C. or less,
Filtration was performed using a mesh wire mesh. After filtration, water was added to adjust the solid content to 40%. The particle size of the obtained latex was 130 nm.

[0096]

Examples 1 to 16 The materials shown in Tables 1 and 2 were blended as follows. (Note that the numerical values in Tables 1 and 2 represent solid contents. All amounts are parts by weight.) 800 parts of water with stirring, followed by amorphous synthetic silica (Fine Seal X37: Co., Ltd.) A predetermined amount of
Stirring was continued for 15 minutes. Next, a predetermined amount of latex was charged, and stirring was continued for another 15 minutes. Additives were added as needed after the latex was charged.

Thereafter, water was added with stirring so that the solid content of the blended product was 18 to 20%, to obtain a blended product. Next, the blended product was applied to a high-quality paper having a basis weight of 70 g with a bar coater.
After the application, the coated paper was immediately left for 90 seconds in a hot air dryer controlled at 130 ° C., and dried to obtain a coated paper. Application amount is 1
The number of the bar coater was adjusted to be 0 g / m ² . The dried coated paper was passed through a calender having a linear pressure of 500 N / cm to obtain an ink jet recording sheet. Tables 1 and 2 show the evaluation results of the obtained ink jet recording sheet of the present invention.

[0098]

Comparative Examples 1 to 7 Compounds shown in Table 3 were prepared in the same manner as in the examples. (The numerical values in Table 3 represent solid contents.) Further, a recording sheet was prepared in the same manner as in the examples, and the ink jet recording sheet was evaluated in the same manner as in the examples. Table 3 shows the evaluation results.

[0099]

[Table 1]

[0100]

[Table 2]

[0101]

[Table 3]

[0102]

According to the present invention, in ink jet printing in a high image quality mode in which the amount of ink is increased as compared with the prior art, the ink absorption is good, and the water resistance, light resistance, and coloring of printed matter are high. It is possible to provide a cationic latex for inkjet recording which can be improved and the strength of the ink receiving layer does not decrease, and a binder composition thereof.

Claims (5)

[Claims] 1. One or more resins selected from polyvinylpyrrolidone, polyacrylamide, polyethyleneimine, polyvinylpyridine, and copolymers thereof.
In the presence of 5 to 10 parts by weight, a tertiary amino group and / or
Or a radical polymerizable monomer composition 1 containing a radical polymerizable monomer (A) having a quaternary ammonium group and a radical polymerizable monomer (B) copolymerizable therewith.
A cationic latex for inkjet recording, comprising a copolymer (a) obtained by polymerizing 00 parts by weight. 2. The cationic latex is a multilayer latex having a core portion and a shell portion, wherein the shell portion contains the copolymer (a), the core portion is a nonionic radical polymerizable monomer, and the crosslinkable radical polymerization is carried out. The cationic latex for inkjet recording according to claim 1, comprising a copolymer (b) obtained by polymerizing a radical polymerizable monomer composition containing a hydrophilic monomer. 3. The cationic latex for ink jet recording according to claim 2, wherein the radical polymerizable monomer composition containing the monomer (B) contains at least (meth) acrylamide. 4. A binder composition for ink-jet recording, comprising the cationic latex according to claim 1, and an inorganic filler. 5. The ink jet recording binder composition according to claim 4, wherein the inorganic filler is amorphous synthetic silica.