WO2012070339A1 - インクジェット記録材料の製造方法 - Google Patents
インクジェット記録材料の製造方法 Download PDFInfo
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- WO2012070339A1 WO2012070339A1 PCT/JP2011/074038 JP2011074038W WO2012070339A1 WO 2012070339 A1 WO2012070339 A1 WO 2012070339A1 JP 2011074038 W JP2011074038 W JP 2011074038W WO 2012070339 A1 WO2012070339 A1 WO 2012070339A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5254—Macromolecular coatings characterised by the use of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds, e.g. vinyl polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
- B41M5/00—Duplicating or marking methods; Sheet materials for use therein
- B41M5/50—Recording sheets characterised by the coating used to improve ink, dye or pigment receptivity, e.g. for ink-jet or thermal dye transfer recording
- B41M5/52—Macromolecular coatings
- B41M5/5218—Macromolecular coatings characterised by inorganic additives, e.g. pigments, clays
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- the present invention relates to a method for producing an ink jet recording material, and further relates to a method for producing an ink jet recording material which is excellent in water resistance and hardly causes cracks during production.
- Inkjet recording is a method in which small droplets of ink are sprayed from nozzles and fixed on the surface of the recording medium to record characters, images, etc. Color printing is easy, running costs are low, and noise during printing It is widely used in home and office printers because of its many advantages. Recently, with the spread of digital cameras, it has been established as a recording method to replace silver salt photography, and ink jet recording materials such as printing directly on the surface of optical discs such as CD / DVD / BD are also used depending on the purpose. Various materials have been selected, and the required quality has become more sophisticated and diverse.
- an ink receiving layer is provided on a support such as paper, plastic sheet or plastic disk.
- the ink receiving layer is made of a porous inorganic material such as silica or alumina bound with a hydrophilic resin binder.
- the porous inorganic material quickly absorbs ink, suppresses bleeding, and forms a perfect circle-like dot. By doing so, a fine image can be expressed.
- the performance required for the binder resin is required to be (1) high affinity for the ink, (2) high binder power for the inorganic fine particles, and the binder resin is polyvinyl alcohol (hereinafter referred to as PVA). Abbreviated.) System resins are widely used.
- the ink jet recording system is required to have high expressive power, that is, high definition of an image and an improvement in printing speed.
- high expressive power that is, high definition of an image and an improvement in printing speed.
- a method of increasing the amount of ink discharged per unit area of the recording material is taken, and the recording material is required to have an ability to absorb a larger amount of ink than before. ing. Therefore, it is necessary to increase the porosity of the ink receiving layer, and development is progressing in the direction of reducing the amount of the binder resin.
- printing at high speed increases the physical load on the surface of the recording material being conveyed in the printer, and absorbs a large amount of ink as described above, thereby recording in a wet state.
- a large load is applied to the material surface.
- the binder resin exhibits a higher binder strength when added in a small amount, and the ink-receiving layer surface does not crack during drying of the coating solution.
- it In order to ensure the porosity of the inorganic fine particles, it must be a highly viscous aqueous solution that does not easily penetrate into the porous fine particles at the coating liquid stage, and (5) water resistance that can provide high surface strength even when wet. Performance such as being high is further demanded.
- Patent Document 1 discloses a technique using PVA having a polymerization degree of 4000 or more.
- PVA having such a high degree of polymerization has a high binder strength and a high aqueous solution viscosity. Therefore, even when the amount of the binder is small, cracking during drying hardly occurs and the porosity of fine particles can be secured.
- the PVA has insufficient surface strength when wet, and the binder strength and aqueous solution viscosity are not sufficient. Furthermore, PVA with such a high degree of polymerization has a problem that production efficiency is extremely poor.
- the upper limit of the degree of polymerization of industrially produced PVA is about 4500, and PVA with a higher degree of polymerization is a method using special equipment or a method that sacrifices productivity (low yield). There is a problem that the production cost is extremely high and industrial disadvantageous.
- Patent Document 2 and Patent Document 3 techniques using PVA and a boron compound are disclosed (for example, Patent Document 2 and Patent Document 3).
- This increases the viscosity of the PVA aqueous solution by using boric acid and / or borax as a cross-linking agent, and prevents the binder resin from penetrating into the porous inorganic fine particles, thereby ensuring the porosity of the inorganic fine particles, It is considered that even a small amount of use contributes to improvement of the binder strength and improvement of the surface strength when wet.
- Patent Document 4 proposes an ink jet recording material using a saponified diacetone acrylamide-fatty acid vinyl ester copolymer and a hydrazine compound.
- Patent Document 5 proposes an ink jet recording medium containing an acetoacetate group-containing PVA resin and a polyhydric hydrazide compound.
- a binder obtained by reacting a PVA resin having a keto group with a crosslinking agent such as a hydrazine compound is excellent in water resistance, and an ink jet recording material having a high surface strength when wet is obtained.
- the porous inorganic fine particles have penetrated, and a large amount of ink is hardly absorbed, and the fineness of the image is not sufficient, and improvement has been desired.
- the binder resin itself permeates into the voids of the fine particles, the amount of the binder as a binder between the fine particles is small, and the problem that cracking at the time of drying and the like has not been completely solved.
- the modified PVA and the crosslinking agent undergo a crosslinking reaction even in an aqueous solution.
- the acetoacetate group-containing PVA-based resin and the polyhydric hydrazide compound have a problem in pot life that gelation occurs during the application of the coating solution for the ink receiving layer because the reaction rate of both is high. It was.
- the saponified diacetone acrylamide-fatty acid vinyl ester copolymer and the hydrazine compound have the same problem, but the diacetone acrylamide copolymer modified PVA proposed by the present inventors is soluble in the water-soluble hydrazine compound.
- the problem of pot life can be solved by using a method (Patent Document 6) in which an organic organic amine or ammonia coexists.
- Patent Document 6 in order to suppress a rapid reaction between diacetone acrylamide copolymer-modified PVA and a hydrazine compound, this method is preliminarily dissolved in an aqueous solution of diacetone acrylamide copolymer-modified PVA.
- the water-soluble hydrazine compound is added after the coexistence of the water-soluble organic amine or ammonia to increase the workable time.
- porous inorganic fine particles are mixed with a mixture of a saponified diacetone acrylamide-fatty acid vinyl ester copolymer obtained by this method, a hydrazine compound and a water-soluble organic amine or ammonia, the viscosity of the mixture is low. Therefore, since the binder resin and the crosslinking agent penetrate into the voids of the fine particles, there are problems that the amount of the binder that binds the fine particles is reduced and the ink absorbability is lowered.
- An object of the present invention is to provide a method capable of stably producing an inkjet recording material capable of expressing a fine image even when the printing speed is high (for example, 10 ppm (Page Per Minute) or more). More specifically, after adding a small amount of the binder aqueous solution, the PVA resin composition having high water resistance and high water resistance is used as a binder, and the viscosity of the aqueous binder solution is high at the time of mixing with the porous inorganic fine particles. Is to provide a method for producing an ink jet recording material in which the viscosity change of the coating liquid is small.
- Example 1 a mixture of an aqueous solution of a saponified vinyl acetate-diacetone acrylamide copolymer and a cross-linking agent is added to a mixture obtained by adding a water-soluble basic compound after at least 30 minutes have passed.
- the present inventors have found that the above-described problems can be solved at once by applying the mixed ink-receiving layer coating liquid onto a support, and have further studied and completed the present invention.
- the present invention relates to the following inventions.
- an ink-receiving layer formed on the support by the coating step contains porous inorganic fine particles, a saponified vinyl acetate-diacetone acrylamide copolymer, and a crosslinking agent.
- Manufacturing method [2] A step of mixing an aqueous solution of a saponified vinyl acetate-diacetone acrylamide copolymer and a crosslinking agent to obtain a mixed solution (a), and after the obtained mixed solution (a) has been thickened, the mixed solution A step of adding and mixing a water-soluble basic compound to (a) to obtain a mixed solution (b), and then adding and mixing porous inorganic fine particles to the mixed solution (b) to prepare an ink receiving layer coating solution And an ink receiving layer formed on the support by the application step, the step of applying to the support an ink receiving layer coating liquid in which porous inorganic fine particles are mixed with the obtained mixed liquid (b).
- the layer contains porous inorganic fine particles, a saponified vinyl acetate-diacetone acrylamide copolymer and a crosslinking agent, and is a water-soluble base for the viscosity (A) of the mixed solution (a) immediately after mixing the crosslinking agent.
- Viscosity of the liquid mixture (b) immediately after mixing the active compound ( Ratio) [(B) / (A)] The production method of the ink jet recording material comprising 1.5 to 10.0.
- the crosslinking agent is a compound having two or more functional groups selected from the group consisting of a hydrazino group, a hydrazide group, and a semicarbazide group.
- Manufacturing method of recording material [4] The method according to any one of [1] to [3], wherein the water-soluble basic compound is at least one selected from the group consisting of ammonia and a water-soluble organic amine. Manufacturing method of inkjet recording material. [5] The 4 wt% aqueous solution viscosity of the saponified product of vinyl acetate-diacetone acrylamide copolymer measured by the method of JIS K-6726 (1994) is 10 to 100 mPa ⁇ s. The method for producing an inkjet recording material according to any one of [1] to [4].
- the viscosity stability of the coating liquid at the time of preparing the ink receiving layer is excellent, and the surface of the ink receiving layer is not cracked in the drying step, so that the productivity is high and industrially. It is advantageous. Further, since the ink jet recording material produced by the production method of the present invention is excellent in ink absorbability, surface strength and water resistance, a fine image even when printed at a high speed (for example, 10 ppm (Page Per Minutes) or more). Can be displayed. Furthermore, in the present invention, since no boron compound is used, reproductive toxicity does not become a problem and safety is high.
- a saponified product of vinyl acetate-diacetone acrylamide copolymer (hereinafter abbreviated as DAVES) used in the present invention is obtained by copolymerizing vinyl acetate and diacetone acrylamide, and saponifying the resulting copolymer. It can manufacture by the well-known method of these.
- copolymerization method of vinyl acetate and diacetone acrylamide known polymerization methods such as bulk polymerization, solution polymerization, suspension polymerization, emulsion polymerization and the like can be adopted. Among them, solution polymerization using methanol as a solvent is industrial. Is preferable.
- alkali saponification and acid saponification As a method for saponifying a polymer obtained by copolymerizing vinyl acetate and diacetone acrylamide, conventionally known alkali saponification and acid saponification can be applied. Among them, a methanol solution of the polymer or methanol and water, methyl acetate, A method of adding an alkali hydroxide to a mixed solution of benzene or the like and subjecting it to alcoholysis is industrially preferable.
- the above-mentioned DAVES is an olefin such as ethylene, propylene, isobutylene, ⁇ -octene, ⁇ -dodecene, vinylene carbonates, acrylics, etc., which can be copolymerized with vinyl acetate or diacetone acrylamide within a range not impairing the effects of the present invention.
- Acid methacrylic acid, crotonic acid, maleic acid, maleic anhydride, itaconic acid, undecylenic acid and other unsaturated acids or salts thereof, mono- or dialkyl esters, nitriles such as acrylonitrile and methacrylonitrile, acrylamide and methacrylamide Amides such as vinyl olefins, olefin sulfonic acids such as vinyl sulfonic acid, allyl sulfonic acid and methallyl sulfonic acid or salts thereof, alkyl vinyl ethers, vinyl esters such as vinyl formate, vinyl propionate and vinyl butyrate, N-acrylic acid Imidomethyltrimethylammonium chloride, allyltrimethylammonium chloride, dimethyldiallylammonium chloride, dimethylallylvinylketone, N-vinylpyrrolidone, vinyl chloride, vinylidene chloride, polyoxyethylene (meth) allyl ether, polyoxy
- polyoxyalkylene (meth) acrylamide polyoxyethylene (1- (meth) acrylamide-1,1-dimethylpropyl) Steal, polyoxyethylene vinyl ether, polyoxypropylene vinyl ether, polyoxyethylene allylamine, polyoxypropylene allylamine, polyoxyethylene vinylamine, polyoxypropylene vinylamine, isopropenyl acetate, vinylethylene carbonate, 2,2-dialkyl-4- It may be copolymerized with at least one selected from vinyl-1,3-dioxolane, glycerol monoallyl ether, 3,4-diacetoxy-1-butene, 1,4-diacetoxy-2-butene and the like.
- the obtained DAVES may be post-modified by a reaction such as acetalization, urethanization, etherification, grafting, phosphate esterification, acetoacetylation, cationization, etc., as long as the effects of the present invention are not inhibited. good.
- the content of the diacetone acrylamide unit in the DAVES is not particularly limited, but is preferably in the range of 0.5 to 15 mol%, more preferably in the range of 1 to 10 mol%. If the diacetone acrylamide unit content is low, the water resistance and moisture resistance may be reduced. If the diacetone acrylamide content is high, the solubility in water will decrease, making it impossible to produce an aqueous coating solution. There is a problem.
- the saponification degree of the above DAVES is not particularly limited, but the saponification degree measured by the method of JIS K-6726 (1994) is preferably 80 mol% or more, and more preferably 85 mol% or more.
- the degree of polymerization of DAVES is not particularly limited, but is preferably 4500 or less from the viewpoint of enhancing industrial productivity.
- the viscosity of DAVES is determined by the method of JIS K-6726 (1994) (rotary viscometer method).
- the viscosity of a 4% by weight aqueous solution measured by the above is preferably 10 to 100 mPa ⁇ s, more preferably 20 to 80 mPa ⁇ s.
- the cross-linking agent used in the present invention is not particularly limited as long as the effects of the present invention are not hindered, but is a functional group having reactivity with the ketone group of DAVES, represented by the following formula (1) —NH—NH 2 (1)
- Preferable examples include compounds having two or more functional groups of at least one selected from the group consisting of semicarbazide groups.
- crosslinking agent examples include carbohydrazide, oxalic acid dihydrazide, malonic acid dihydrazide, succinic acid dihydrazide, glutaric acid dihydrazide, adipic acid dihydrazide, pimelic acid dihydrazide, suberic acid dihydrazide, azelaic acid dihydrazide, sebacic acid dihydride hydride , Hexadecanediohydrazide, terephthalic acid dihydrazide, isophthalic acid dihydrazide, 2,6-naphthoic acid dihydrazide, 4,4'-bisbenzenedihydrazide, 1,4-cyclohexanedihydrazide, tartaric acid dihydrazide, malic acid dihydrazide, iminodiacetic acid dihydrazide, itaconic acid Dihydrazide, ethylenediaminetetraacetic acid tetrahydrazide,
- the amount of the crosslinking agent used is not particularly limited, but is preferably 1 to 20 parts by weight, more preferably 2 to 15 parts by weight, and further preferably 3 to 10 parts by weight with respect to 100 parts by weight of DAVES.
- the amount of the crosslinking agent used is small, not only the water resistance and moisture resistance are lowered, but also the viscosity when mixing the mixed liquid containing DAVES and the crosslinking agent and the porous inorganic fine particles is low, and the voids of the fine particles cannot be secured. .
- DAVES and a crosslinking agent are used as a binder.
- Examples of the method of mixing the DAVES of the present invention and the crosslinking agent include a method of adding and mixing an aqueous solution of the crosslinking agent to an aqueous solution of DAVES prepared in advance.
- the temperature at which DAVES and the crosslinking agent are mixed is not particularly limited, but is usually about 10 to 60 ° C.
- a method for preparing a DAVES aqueous solution a DAVES resin is previously dispersed in room temperature water, heated to 80 ° C. or higher with stirring, completely dissolved, and then cooled by a conventionally known PVA resin dissolution method. Can do.
- a solid crosslinking agent may be added to the aqueous solution of DAVES.
- an aqueous solution of the crosslinking agent is prepared in advance, and the aqueous solution is used as the DAVES. A method of adding to an aqueous solution is preferred.
- the water-soluble basic compound used in the present invention will be described.
- the mixed solution of DAVES and the crosslinking agent is added after the mixing of DAVES and the crosslinking agent in the present invention.
- a water-soluble basic compound is added. Since DAVES and the cross-linking agent increase the reaction rate under acidic conditions and decrease under basic conditions, the water-soluble basic compound may be any compound that increases the pH of the system.
- Water-soluble organic amines and ammonia not only have a high reaction suppression effect between DAVES and a cross-linking agent, but also volatilize when applying and drying the coating solution, and therefore do not impair the physical properties and water resistance of the recording material. This is preferable.
- water-soluble basic compounds include, in addition to water-soluble organic amines and ammonia, alkali metal hydroxides such as sodium hydroxide and potassium hydroxide, and alkaline earth metal hydroxides such as calcium hydroxide. Thing etc. are mentioned.
- water-soluble organic amines include monoethanolamine, aminoethylethanolamine, monoisopropanolamine, N- (2-hydroxypropyl) -ethylenediamine, 2-amino-1-butanol, and 2-amino-2-methyl.
- Primary alkanolamines such as methane; secondary alkanolamines such as diethanolamine, methylethanolamine, butylmethanolamine, N-acetylethanolamine, diisopropanolamine; triethanolamine, methyldiethanolamine, dimethylethanolamine, Tertiary alkanolamines such as ethylethanolamine, ethyldiethanolamine, triisopropanolamine; primary alkylamines such as methylamine, ethylamine, isobutylamine, t-butylamine, cyclohexylamine; dimethylamine, diethylamine, diisopropylamine, etc.
- Secondary alkylamines One or more selected from the group consisting of tertiary alkylamines such as trimethylamine can be used.
- the amount of the water-soluble basic compound used is preferably 0.05 to 20 parts by weight, more preferably 0.1 to 10 parts by weight with respect to 100 parts by weight of DAVES.
- porous inorganic fine particles used in the present invention include wet synthetic silica, colloidal silica, gas phase method silica, light calcium carbonate, heavy calcium carbonate, kaolin, talc, calcium sulfate, barium sulfate, titanium dioxide, and oxidation.
- White inorganic pigments and inorganic sols such as method alumina, aluminum hydroxide, alumina, lithobon, zeolite, hydrous halloysite, magnesium carbonate, magnesium hydroxide can be used, and these can be used alone or in combination of two or more. It can be used in conjunction seen.
- Precipitated silica is produced by reacting sodium silicate and sulfuric acid under alkaline conditions, and the silica particles that have grown are agglomerated and settled, and are then commercialized through filtration, water washing, drying, pulverization and classification.
- Examples of the precipitated silica are commercially available from Tosoh Silica Co., Ltd. as Nipsil (trade name) series and from Tokuyama Co., Ltd. as Toku Seal and Fine Seal (trade name) series.
- Gel silica is produced by reacting sodium silicate and sulfuric acid under acidic conditions.
- the microparticles dissolve and reprecipitate so as to bind the other primary particles, so that the distinct primary particles disappear and form relatively hard aggregated particles having an internal void structure.
- it is commercially available from Tosoh Silica Co., Ltd. as nip gel (trade name) and from Grace Japan Co., Ltd. as syloid and silo jet (trade name).
- the sol method silica is also called colloidal silica, and is obtained by heating and aging silica sol obtained through metathesis of sodium silicate acid or the like through an ion exchange resin layer.
- Snowtex (trade name) from Nissan Chemical Industries, Ltd. Is commercially available.
- Vapor phase silica is also called a dry method as opposed to a wet method, and is generally made by a flame hydrolysis method. Specifically, a method of making silicon tetrachloride by burning with hydrogen and oxygen is generally known, but silanes such as methyltrichlorosilane and trichlorosilane can be used alone or in silicon tetrachloride instead of silicon tetrachloride. It can be used in a mixed state. Vapor phase silica is commercially available as Aerosil from Nippon Aerosil Co., Ltd. and QS type from Tokuyama Co., Ltd.
- the particle diameter of the porous inorganic fine particles used in the present invention is not particularly limited as long as the effects of the present invention are not hindered, and is selected according to the type of inorganic fine particles used.
- in the case of wet synthetic silica those having an average particle diameter of 1 to 12 ⁇ m are preferable.
- colloidal silica those having an average particle diameter of 5 to 100 nm are preferable.
- the diameter is preferably 30 nm or less.
- the average particle diameter is a particle diameter observed with an electron microscope (taken an electron micrograph of 10,000 to 400,000 magnifications, and measured and averaged the diameter of the particles in a 5 cm square, for example. “Particle Handbook” , Asakura Shoten, p52, 1991).
- the use ratio of the porous inorganic fine particles and DAVES is set according to the type and purpose of the porous inorganic fine particles to be used, and the weight ratio of DAVES / porous inorganic fine particles is preferably 1/100 to 100/100, 3/100 to 50/100 is more preferable.
- FIG. 1 shows the results of measuring the viscosity at 20 ° C. over time of a mixed solution of 8% by weight of DAVES, 0.4% by weight of adipic acid dihydrazide (ADH) and 0.1% by weight of isopropanolamine (IPAm).
- [1] in FIG. 1 shows the change in viscosity over time when no water-soluble base compound is added to the mixed solution of DAVES and ADH.
- FIG. 1 immediately after the addition of ADH. A crosslinking reaction occurs, and the viscosity of the mixed solution rises rapidly.
- [2] in FIG. 1 is a change in viscosity with time when ADH is added to a mixture of DAVES and IPAm, and the presence of basic IPAm suppresses the crosslinking reaction between DAVES and ADH.
- the viscosity of the liquid mixture is stable at a low level.
- the order of mixing the components used in the ink receiving layer coating liquid of the present invention should be the order of the DAVES aqueous solution and the crosslinking agent, followed by the water-soluble basic compound, and finally the porous inorganic fine particles. If this order is lost, the effect of the present invention is not exhibited.
- the timing of adding the basic compound is important. That is, the water-soluble basic compound must be added when the viscosity of the mixed solution of DAVES and the crosslinking agent increases and reaches a desired viscosity. Since the thickening speed of the DAVES / crosslinking agent mixture varies depending on the concentration of the aqueous solution, the amount of the crosslinking agent, the temperature, etc., can the time to reach the desired viscosity be determined from the results of the previously measured viscosity change? It is desirable to add a water-soluble basic compound when the desired viscosity is obtained from the torque and current value of the stirrer when stirring the mixed solution of DAVES and the crosslinking agent.
- the concentration of the aqueous solution, the amount of the crosslinking agent Although it varies depending on conditions such as temperature, it must be at least 30 minutes or longer. If this time is less than 30 minutes, the mixture does not reach the desired viscosity, or if the desired viscosity is reached in less than 30 minutes, the viscosity increase rate is not sufficiently reduced even by adding a water-soluble basic compound. However, there is a risk of problems in the subsequent mixing and coating process.
- an aqueous solution of DAVES and a crosslinking agent are mixed to obtain a mixed solution (a), and after the mixed solution (a) is thickened, a water-soluble basic compound and porous inorganic fine particles are added.
- the ink receiving layer coating liquid is prepared by mixing, but the viscosity (A) of the liquid mixture (a) consisting of DAVES and the crosslinking agent immediately after mixing the crosslinking agent (before adding the water-soluble basic compound)
- the ratio of the viscosity (B) of the mixed solution (b) comprising DAVES, the crosslinking agent and the water-soluble basic compound after adding and mixing the water-soluble basic compound (before adding the porous inorganic fine particles) [ (B) / (A)] is preferably 1.5 to 10.0, and more preferably 1.7 to 8.0.
- the viscosity ratio [(B) / (A)] is less than 1.5, the viscosity of the aqueous binder solution when mixing the porous inorganic fine particles is low, so that the ink absorbability of the ink receiving layer is low. It is disadvantageous in terms.
- the viscosity ratio [(B) / (A)] exceeds 10.0, the viscosity of the aqueous binder solution becomes too high, and it becomes difficult to mix with porous inorganic fine particles and apply to the support. It is disadvantageous.
- the mixed solution of DAVES and the crosslinking agent (a) is stirred even if it is left standing. It does not matter.
- the temperature at that time is not particularly limited, but it is usually 10 ° C. to 80 ° C., preferably 15 ° C. to 60 ° C.
- water-soluble resins or water-dispersible resins that can be used in combination include albumin, gelatin, casein, starch, gum arabic, cellulose derivatives such as methylcellulose, hydroxyethylcellulose, polyamide resins, melamine resins, PVA, vinylpyrrolidone-modified PVA, N- Substituted or unsubstituted (meth) acrylamide-modified PVA, silanol-modified PVA, sulfonic acid-modified PVA, sodium poly (meth) acrylate, anion-modified PVA, sodium alginate, water-soluble polyester and other anionic water-soluble resins, polyethyleneimine, polyvinyl Amine, polyallylamine, polyallylamine sulfone copolymers or their ammonium salts, cationized starch, cationized poly (meth) acrylamide, cation-modified PVA, cationization Water dispersibility of cationic water-soluble resins such as ly
- an ink receiving layer coating solution comprising DAVES, a cross-linking agent, a water-soluble basic compound, porous inorganic fine particles, and water obtained by the above method is coated on a support. And an ink receiving layer is formed by the step.
- Such a support is not particularly limited.
- paper paperboard such as manila balls, white balls, liners, etc., general high quality paper, medium quality paper, gravure paper and other printing paper, high grade paper / intermediate paper / lower grade paper, Newspaper, release paper, carbon paper, non-carbon paper, glassine paper, etc.
- resin-coated paper synthetic paper, non-woven fabric, cloth, metal foil, polyethylene, polypropylene, PET, polycarbonate, polyvinyl chloride, ethylene-propylene copolymer Films, sheets and molded products made of thermoplastic resins such as these are used.
- the coating method of the coating liquid for providing the ink receiving layer on the support is not particularly limited, but is an air knife coater, curtain coater, slide lip coater, die coater, blade coater, gate roll coater, bar coater, rod coater.
- Well-known methods using apparatuses such as a bill blade coater, a short dwell blade coater, and a size press can be used.
- the amount of solid content in the coating solution is not particularly limited, but is preferably 5 to 60% by weight, more preferably 8 to 50% by weight, and still more preferably 10 to 30% by weight of the entire coating solution. If the amount of solids in the coating solution is small, not only will the drying load increase, but the uniformity of the coating layer thickness may be reduced. Conversely, if the amount of solids is large, the coating solution will have a high viscosity. Therefore, workability may be reduced, such as difficulty in coating at high speed.
- the drying method after applying the coating solution to the support is not particularly limited, but it is preferable from the viewpoint of productivity to use heat drying such as a method of blowing hot air or a method of irradiating infrared rays.
- the drying conditions are not particularly limited, but the drying may be usually performed at 90 to 120 ° C. for about 1 to 30 minutes.
- DAVES was synthesized by the following method. The degree of saponification and the viscosity of a 4% aqueous solution were measured according to JIS K-6726 (1994). Further, the diacetone acrylamide content (denaturation degree) was determined from the result of nitrogen analysis of a sample in which DAVES was sufficiently washed with methanol.
- the obtained gel-like material was pulverized, thoroughly washed with methanol and then dried to obtain a saponified product of vinyl acetate-diacetone acrylamide copolymer. It was found that the content of diacetone acrylamide units in this resin was 5.0 mol%. This resin had a 4% aqueous solution viscosity of 26.8 mPa ⁇ s at 20 ° C. and a saponification degree of 98.4 mol%.
- Example 1 Pure water (92 parts) was added to DAVES1 (8 parts) obtained in Synthesis Example 1, and the temperature was raised while stirring. After dissolving at 90 ° C. for 2 hours, the solution was cooled to 20 ° C. to obtain an 8% aqueous solution. It was. To 100 parts of this aqueous solution, 4 parts of a 10% aqueous solution of adipic acid dihydrazide as a cross-linking agent was added, mixed rapidly, and after 4 hours with slow stirring at 20 ° C., isopropanolamine was added as a water-soluble basic compound. .1 part was added and mixed.
- the viscosity (A) of the aqueous solution immediately after the addition and mixing of the crosslinking agent was 285 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition and mixing of the water-soluble basic compound after 4 hours was 643 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution. To 50 parts of the above mixture, 35 parts of amorphous silica [trade name: Fine Seal X-45, average particle size 4.5 ⁇ m] manufactured by Tokuyama Co., Ltd. is gradually added while being dispersed.
- diallyldimethylammonium chloride manufactured by Nittobo Co., Ltd., trade name: PAS-H-5L, 28% aqueous solution
- 160 parts of pure water were added and stirred at 5000 rpm for 10 minutes using a homogenizer, and the solid content was 15%.
- An ink receiving layer coating solution was prepared. This coating solution is applied to high-quality paper having a basis weight of 64 g / m 2 using an air knife coater so that the solid content is 13 g / m 2 and dried at 105 ° C. for 10 minutes to produce an ink jet recording material. did.
- Example 2 After heating to 50 ° C. to 100 parts of 8% aqueous solution of DAVES1 obtained in Synthesis Example 1, 4 parts of 10% aqueous solution of hexamethylene semicarbazide [Hardener SC manufactured by Asahi Kasei Chemicals Corporation] as a crosslinking agent was added. After rapid mixing, after 3 hours while slowly stirring at 50 ° C., 0.1 part of monoethanolamine was added and mixed as a water-soluble basic compound.
- the viscosity (A) of the aqueous solution immediately after adding and mixing the cross-linking agent was 205 mPa ⁇ s, but the viscosity (B) of the aqueous solution after adding and mixing the water-soluble basic compound after 3 hours was 573 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution. An ink jet recording material was produced in the same manner as in Example 1 using the above mixed solution.
- Example 3 To 100 parts of the 8% aqueous solution of DAVES2 obtained in Synthesis Example 2, 5 parts of a 10% aqueous solution of N-aminopolyacrylamide [APA-L manufactured by Otsuka Chemical Co., Ltd.] as a cross-linking agent was added and quickly mixed. After 2 hours with slow stirring at 20 ° C., 0.2 part of ammonia was added and mixed as a water-soluble basic compound.
- N-aminopolyacrylamide APA-L manufactured by Otsuka Chemical Co., Ltd.
- the viscosity (A) of the aqueous solution immediately after the addition / mixing of the cross-linking agent was 87 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition / mixing of the water-soluble basic compound after the lapse of 2 hours was 518 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution. An ink jet recording material was produced in the same manner as in Example 1 using the above mixed solution.
- Example 4 After adding 5 parts of 10% aqueous solution of carbohydrazide as a crosslinking agent to 100 parts of 8% aqueous solution of DAVES3 obtained in Synthesis Example 3, the mixture was quickly mixed, and after 1 hour with slow stirring at 20 ° C., water-soluble As a basic compound, 1 part of a 10% aqueous solution of sodium hydroxide was added and mixed.
- the viscosity (A) of the aqueous solution immediately after the addition and mixing of the crosslinking agent was 758 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition and mixing of the water-soluble basic compound after 1 hour was 1320 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution. An ink jet recording material was prepared in the same manner as in Example 1 using the above mixed solution.
- Example 5 A mixed solution was prepared in the same manner as in Example 1 except that the time from the addition of the crosslinking agent to the addition of the water-soluble basic compound was changed from 4 hours to 6 hours.
- the viscosity (A) of the aqueous solution immediately after the addition and mixing of the cross-linking agent was 285 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition and mixing of the water-soluble basic compound after 6 hours had passed was 1670 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution.
- An ink jet recording material was prepared in the same manner as in Example 1 using the above mixed solution.
- Example 6 A mixed solution was prepared in the same manner as in Example 2 except that the time from the addition of the crosslinking agent to the addition of the water-soluble basic compound was changed from 3 hours to 40 minutes.
- the viscosity (A) of the aqueous solution immediately after the addition / mixing of the cross-linking agent was 205 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition / mixing of the water-soluble basic compound after the elapse of 40 minutes was 320 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution.
- An ink jet recording material was prepared in the same manner as in Example 1 using the above mixed solution.
- Example 1 A mixed solution was prepared in the same manner as in Example 1 except that the time from the addition of the crosslinking agent to the addition of the water-soluble basic compound was changed from 4 hours to 15 minutes.
- the viscosity (A) of the aqueous solution immediately after the addition and mixing of the crosslinking agent was 285 mPa ⁇ s, but the viscosity (B) of the aqueous solution after addition and mixing of the water-soluble basic compound after 15 minutes was 298 mPa ⁇ s. s.
- Table 2 shows the conditions for preparing the mixed solution.
- An ink jet recording material was prepared in the same manner as in Example 1 using the above mixed solution.
- Example 3 A mixed liquid was prepared in the same manner as in Example 1 except that no crosslinking agent was added, and an ink jet recording material was prepared in the same manner as in Example 1. Table 2 shows the conditions for preparing the mixed solution.
- ADH means adipic acid dihydrazide
- SC means hexamethylene semicarbazide (Hardener SC)
- APA means N-aminopolyacrylamide (APA-L)
- CDH means carbohydrazide
- IPAm Means isopropanolamine
- MEAm means monoethanolamine.
- ⁇ Surface strength> A mending tape (width 18 mm) manufactured by Sumitomo 3M Co., Ltd. was applied to the surface of the ink-receiving layer of the ink-jet recording material produced, and the state of the coating layer transferred to the mending tape when peeled was visually observed.
- the surface strength was evaluated according to the following criteria. ⁇ : Almost no coating layer is transferred and there is no problem in practical use. ⁇ : A part of the coating layer is transferred, and there is a slight problem level. ⁇ : A considerable part of the coating layer is transferred and practically used. Problem level
- ⁇ Ink absorbability> Set the prepared inkjet recording material on the printer “PX-V630” manufactured by Seiko Epson Corporation, perform solid printing with black ink, and rub the printed part on the recording sheet with your finger at regular intervals after printing. The time until ceased to change was measured. The shorter the time, the greater the ink absorption rate.
- the ink jet recording materials of Examples 1 to 6 produced by the production method of the present invention showed high surface strength without cracks on the surface of the ink receiving layer. It was. Further, since the ink jet recording material of the present invention has high ink absorbability and high water resistance, it is possible to display a fine image even when printing at high speed. As described above, the ink jet recording material produced by the production method of the present invention has a high binder strength even when the ink receiving layer has a high porosity and a small amount of the binder resin in order to increase the ink absorbability. In addition, there is an excellent effect that no cracks occur on the surface of the ink receiving layer.
- Comparative Example 1 in the production method of the present invention, the time from the addition of the cross-linking agent to the addition of the water-soluble basic compound is short, and the cross-linking reaction is not sufficiently advanced. It is considered that since the binder resin penetrated into the voids of the porous inorganic fine particles, the amount of the binder was reduced, the surface strength was lowered and the ink absorbability was also lowered.
- Comparative Examples 2 and 3 do not use a saponified vinyl acetate-diacetone acrylamide copolymer and a crosslinking agent, respectively, so all evaluation items of surface strength, ink absorbency and water resistance without causing a crosslinking reaction. It seems that there was a problem.
- Comparative Example 4 does not use a water-soluble basic compound, the cross-linking reaction has progressed too much in the process of preparing the ink-receiving layer coating liquid and the process of coating the ink-receiving layer, making it impossible to produce an inkjet recording material. Conceivable.
- the viscosity of the coating liquid is excellent when producing the ink receiving layer, and the surface of the ink receiving layer is not cracked in the drying step, so that the productivity is high. Further, since the ink jet recording material manufactured by the manufacturing method of the present invention is excellent in ink absorbability, surface strength and water resistance, it is possible to display a fine image even when printing at high speed.
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Abstract
Description
[1]酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物の水溶液と架橋剤を混合し、混合液(a)を得る工程、前記混合後少なくとも30分以上経過した後に、混合液(a)に水溶性の塩基性化合物を添加して混合液(b)を得る工程、及び、得られた混合液(b)に多孔性無機微粒子を混合したインク受容層塗布液を支持体に塗布する工程を有し、前記塗布工程により支持体上に形成されたインク受容層が、多孔性無機微粒子、酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物及び架橋剤を含有することを特徴とするインクジェット記録材料の製造方法。
[2]酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物の水溶液と架橋剤を混合し、混合液(a)を得る工程、得られた混合液(a)が増粘した後に、該混合液(a)に水溶性の塩基性化合物を添加・混合し、混合液(b)を得る工程、次いで、混合液(b)に多孔性無機微粒子を添加・混合してインク受容層塗布液を調製する工程、及び、得られた混合液(b)に多孔性無機微粒子を混合したインク受容層塗布液を支持体に塗布する工程を有し、前記塗布工程により支持体上に形成されたインク受容層が、多孔性無機微粒子、酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物及び架橋剤を含有し、架橋剤を混合した直後の混合液(a)の粘度(A)に対する、水溶性の塩基性化合物を混合した直後の混合液(b)の粘度(B)の比[(B)/(A)]が、1.5~10.0であることを特徴とするインクジェット記録材料の製造方法。
[3]前記の架橋剤が、ヒドラジノ基、ヒドラジド基及びセミカルバジド基からなる群から選ばれる官能基を2個以上有する化合物であることを特徴とする前記[1]又は[2]に記載のインクジェット記録材料の製造方法。
[4]前記の水溶性の塩基性化合物が、アンモニア及び水溶性有機アミンからなる群から選ばれる1種以上であることを特徴とする前記[1]~[3]のいずれか1項に記載のインクジェット記録材料の製造方法。
[5]前記の酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物のJIS K-6726(1994)の方法で測定される4重量%水溶液粘度が、10~100mPa・sであることを特徴とする前記[1]~[4]のいずれか1項に記載のインクジェット記録材料の製造方法。
-NH-NH2 (1)
で示されるヒドラジノ基、下記式(2)
-CO-NH-NH2 (2)
で示されるヒドラジド基、及び下記式(3)
-NH-CO-NH-NH2 (3)
で示されるセミカルバジド基からなる群から選ばれる一種以上の官能基を2個以上有する化合物等が好適に挙げられる。
[合成例1]
撹拌機、温度計、滴下ロート及び還流冷却器を取り付けたフラスコ中に、酢酸ビニル694部、ジアセトンアクリルアミド5部、及びメタノール178部を仕込み、系内の窒素置換を行った後、内温を60℃まで昇温した。この系に2,2-アゾビスイソブチリロニトリル1部をメタノール50部に溶解した溶液を添加し、重合を開始した。重合開始後、5時間かけて、ジアセトンアクリルアミド30部をメタノール43部に溶解した溶液を一定速度で滴下し、6時間後に重合禁止剤としてm-ジニトロベンゼンを添加し、重合を停止した。重合収率は78%であった。得られた反応混合物にメタノール蒸気を加えながら残存する酢酸ビニルを留出し、ジアセトンアクリルアミド共重合成分を含有する酢酸ビニル系重合体の50%メタノール溶液を得た。この混合物500重量部にメタノール50重量部と水酸化ナトリウムの4%メタノール溶液10重量部とを加えてよく混合し、40℃で鹸化反応を行った。得られたゲル状物を粉砕し、メタノールでよく洗浄した後に乾燥して、酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物を得た。この樹脂中のジアセトンアクリルアミド単位の含有率は5.0モル%であることが判明した。この樹脂の20℃における4%水溶液粘度は26.8mPa・s、鹸化度は98.4モル%であった。
表1に示すように仕込み組成を変え、鹸化反応の水酸化ナトリウム量を変えた以外は、合成例1と同様にして表1に示すDAVES2~3を得た。
合成例1で得られたDAVES1(8部)に純水(92部)を加え、撹拌しながら昇温し、90℃で2時間溶解を行った後、20℃まで冷却し8%水溶液を得た。この水溶液100部に、架橋剤としてアジピン酸ジヒドラジドの10%水溶液4部を添加し、すばやく混合した後、20℃でゆっくりと撹拌しながら4時間経過後に、水溶性の塩基性化合物としてイソプロパノールアミン0.1部を添加・混合した。架橋剤を添加・混合した直後の水溶液の粘度(A)は285mPa・sであったが、4時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は643mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液50部に、非晶質シリカ[(株)トクヤマ製、商品名:ファインシールX-45、平均粒子径4.5μm]35部を分散させながら徐々に加え、インク定着剤としてポリジアリルジメチルアンモニウムクロライド[日東紡(株)製、商品名:PAS-H-5L、28%水溶液]5部及び純水160部を加え、ホモジナイザーを用いて5000rpmで10分間撹拌し、固形分15%のインク受容層塗布液を作製した。
かかる塗布液を、坪量64g/m2の上質紙にエアナイフコーターを用いて、固形分塗布量が13g/m2になるように塗布し、105℃で10分間乾燥し、インクジェット記録材料を作製した。
合成例1で得られたDAVES1の8%水溶液100部に、50℃に加温した後、架橋剤としてヘキサメチレンセミカルバジド[旭化成ケミカルズ(株)製 ハードナーSC]の10%水溶液4部を添加し、すばやく混合した後、50℃でゆっくりと撹拌しながら3時間経過後に、水溶性の塩基性化合物としてモノエタノールアミン0.1部を添加・混合した。架橋剤を添加・混合した直後の水溶液の粘度(A)は205mPa・sであったが、3時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は573mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
合成例2で得られたDAVES2の8%水溶液100部に、架橋剤としてN-アミノポリアクリルアミド[大塚化学(株)製 APA-L]の10%水溶液5部を添加し、すばやく混合した後、20℃でゆっくりと撹拌しながら2時間後に、水溶性の塩基性化合物としてアンモニア0.2部を添加・混合した。架橋剤を添加・混合した直後の水溶液の粘度(A)は87mPa・sであったが、2時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は518mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
合成例3で得られたDAVES3の8%水溶液100部に、架橋剤としてカルボヒドラジドの10%水溶液5部を添加し、すばやく混合した後、20℃でゆっくりと撹拌しながら1時間後に、水溶性の塩基性化合物として水酸化ナトリウム10%水溶液1部を添加・混合した。架橋剤を添加・混合した直後の水溶液の粘度(A)は758mPa・sであったが、1時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は1320mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
架橋剤を添加してから、水溶性の塩基性化合物を添加するまでの時間を4時間から6時間に換えた以外は実施例1と同様にして混合液を作製した。架橋剤を添加・混合した直後の水溶液の粘度(A)は285mPa・sであったが、6時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は1670mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
架橋剤を添加してから、水溶性の塩基性化合物を添加するまでの時間を3時間から40分間に換えた以外は実施例2と同様にして混合液を作製した。架橋剤を添加・混合した直後の水溶液の粘度(A)は205mPa・sであったが、40分間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は320mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
架橋剤を添加してから、水溶性の塩基性化合物を添加するまでの時間を4時間から15分間に換えた以外は実施例1と同様にして混合液を作製した。架橋剤を添加・混合した直後の水溶液の粘度(A)は285mPa・sであったが、15分間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は298mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
合成例1で得られたDAVESに換えて未変性PVA[日本酢ビ・ポバール(株)製 JP-18,鹸化度88.0モル%、4%水溶液粘度24.1mPa・s]を使用した以外は実施例1と同様にして混合液を作製した。架橋剤を添加・混合した直後の水溶液の粘度(A)は272mPa・sであったが、4時間経過後に水溶性の塩基性化合物を添加・混合した後の水溶液の粘度(B)は270mPa・sであった。混合液の作製条件を表2に示す。
上記の混合液を用い、実施例1と同様にしてインクジェット記録材料を作製した。
架橋剤を添加しない以外は実施例1と同様にして混合液を作製し、実施例1と同様にしてインクジェット記録材料を作製した。混合液の作製条件を表2に示す。
合成例1で得られたDAVESの8%水溶液100部に、架橋剤としてアジピン酸ジヒドラジドの10%水溶液4部を添加し、すばやく混合した後、20℃でゆっくりと撹拌しながら4時間経過後に、水溶性の塩基性化合物を添加していない混合液に対して、実施例1と同様にして、インク受容層塗布液を作製し、上質紙に塗布しようとしたが、途中で塗布液がゲル化し、塗布を継続することができず、インクジェット記録材料が得られなかった。混合液の作製条件を表2に示す。
作製したインクジェット記録材料のインク受容層表面を倍率100倍の顕微鏡で観察し、インク受容層表面のひび割れの程度を以下の基準で評価した。
○:表面亀裂が観察されず問題なし
△:表面の亀裂が複数観察され、実用が困難なレベル
×:非常に多数の亀裂が観察され、実用が不可能なレベル
作製したインクジェット記録材料のインク受容層表面に、住友スリーエム(株)製のメンディングテープ(幅18mm)を貼り付け、剥離した際のメンディングテープに転写された塗工層の状態を目視観察し、以下の基準によって表面強度の評価とした。
○:ほとんど塗工層が転写せず、実用上問題のないレベル
△:塗工層の一部が転写され、若干、問題のあるレベル
×:塗工層のかなりの部分が転写され、実用上問題のあるレベル
作製したインクジェット記録材料を、セイコーエプソン(株)製プリンター「PX-V630」にセットし、黒インクでベタ印刷を行い、印刷後一定時間ごとに記録シート上の印字部分を指でこすり、印字部分が変化しなくなるまでの時間を測定した。時間が短いほどインク吸収速度が大である。
インクジェット記録材料の印字部分に水をつけ、指でこすった時、印字部が溶解したり、にじんだりするかどうかを以下の基準で判定した。
○:にじみがなく、原形をとどめている。
×:にじみが大きく、原形をとどめていない。
Claims (5)
- 酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物の水溶液と架橋剤を混合し、混合液(a)を得る工程、前記混合後少なくとも30分以上経過した後に、混合液(a)に水溶性の塩基性化合物を添加して混合液(b)を得る工程、及び、得られた混合液(b)に多孔性無機微粒子を混合したインク受容層塗布液を支持体に塗布する工程を有し、前記塗布工程により支持体上に形成されたインク受容層が、多孔性無機微粒子、酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物及び架橋剤を含有することを特徴とするインクジェット記録材料の製造方法。
- 酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物の水溶液と架橋剤を混合し、混合液(a)を得る工程、得られた混合液(a)が増粘した後に、該混合液(a)に水溶性の塩基性化合物を添加・混合し、混合液(b)を得る工程、次いで、混合液(b)に多孔性無機微粒子を添加・混合してインク受容層塗布液を調製する工程、及び、得られた混合液(b)に多孔性無機微粒子を混合したインク受容層塗布液を支持体に塗布する工程を有し、前記塗布工程により支持体上に形成されたインク受容層が、多孔性無機微粒子、酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物及び架橋剤を含有し、架橋剤を混合した直後の混合液(a)の粘度(A)に対する、水溶性の塩基性化合物を混合した直後の混合液(b)の粘度(B)の比[(B)/(A)]が、1.5~10.0であることを特徴とするインクジェット記録材料の製造方法。
- 前記の架橋剤が、ヒドラジノ基、ヒドラジド基及びセミカルバジド基からなる群から選ばれる官能基を2個以上有する化合物であることを特徴とする請求項1又は2記載のインクジェット記録材料の製造方法。
- 前記の水溶性の塩基性化合物が、アンモニア及び水溶性有機アミンからなる群から選ばれる1種以上であることを特徴とする請求項1~3のいずれか1項に記載のインクジェット記録材料の製造方法。
- 前記の酢酸ビニル-ジアセトンアクリルアミド共重合体の鹸化物のJIS K-6726(1994)の方法で測定される4重量%水溶液粘度が、10~100mPa・sであることを特徴とする請求項1~4のいずれか1項に記載のインクジェット記録材料の製造方法。
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WO2018074448A1 (ja) * | 2016-10-19 | 2018-04-26 | 日本酢ビ・ポバール株式会社 | ポリビニルアルコール系樹脂の架橋反応の促進方法 |
CN113912103A (zh) * | 2021-11-02 | 2022-01-11 | 常州市卓群纳米新材料有限公司 | 一种控制喷涂颜色的耐腐蚀氧化钇的制备方法 |
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JP2013039730A (ja) * | 2011-08-16 | 2013-02-28 | Japan Vam & Poval Co Ltd | インクジェット記録材料の製造方法 |
WO2018074448A1 (ja) * | 2016-10-19 | 2018-04-26 | 日本酢ビ・ポバール株式会社 | ポリビニルアルコール系樹脂の架橋反応の促進方法 |
CN113912103A (zh) * | 2021-11-02 | 2022-01-11 | 常州市卓群纳米新材料有限公司 | 一种控制喷涂颜色的耐腐蚀氧化钇的制备方法 |
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