WO2015093144A1 - 低アミン含有量のキナクリドン顔料、およびその製造方法 - Google Patents
低アミン含有量のキナクリドン顔料、およびその製造方法 Download PDFInfo
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- WO2015093144A1 WO2015093144A1 PCT/JP2014/078194 JP2014078194W WO2015093144A1 WO 2015093144 A1 WO2015093144 A1 WO 2015093144A1 JP 2014078194 W JP2014078194 W JP 2014078194W WO 2015093144 A1 WO2015093144 A1 WO 2015093144A1
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- quinacridone pigment
- quinacridone
- aromatic primary
- ink
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B48/00—Quinacridones
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0033—Blends of pigments; Mixtured crystals; Solid solutions
- C09B67/0034—Mixtures of two or more pigments or dyes of the same type
- C09B67/0036—Mixtures of quinacridones
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B67/00—Influencing the physical, e.g. the dyeing or printing properties of dyestuffs without chemical reactions, e.g. by treating with solvents grinding or grinding assistants, coating of pigments or dyes; Process features in the making of dyestuff preparations; Dyestuff preparations of a special physical nature, e.g. tablets, films
- C09B67/0096—Purification; Precipitation; Filtration
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
- C09D11/037—Printing inks characterised by features other than the chemical nature of the binder characterised by the pigment
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/30—Inkjet printing inks
- C09D11/32—Inkjet printing inks characterised by colouring agents
- C09D11/322—Pigment inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/41—Organic pigments; Organic dyes
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G9/00—Developers
- G03G9/08—Developers with toner particles
- G03G9/09—Colouring agents for toner particles
- G03G9/0906—Organic dyes
- G03G9/0922—Formazane dyes; Nitro and Nitroso dyes; Quinone imides; Azomethine dyes
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D221/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00
- C07D221/02—Heterocyclic compounds containing six-membered rings having one nitrogen atom as the only ring hetero atom, not provided for by groups C07D211/00 - C07D219/00 condensed with carbocyclic rings or ring systems
- C07D221/04—Ortho- or peri-condensed ring systems
- C07D221/18—Ring systems of four or more rings
Definitions
- the present invention relates to a quinacridone pigment having a low content of a specific aromatic primary amine (PAA) that is harmful to the human body and high safety, and a method for producing the same.
- PAA specific aromatic primary amine
- Quinacridone pigments known as organic pigments, are highly weather-resistant pigments with a wide hue from purple to orange-yellow, centered on red, gravure, flexo inks, colorants for plastics, paints, lithographic inks, toners, and inkjet inks. It is widely used as a colorant within the possible range. From a practical point of view, strict requirements are imposed on their fastness characteristics and color characteristics.
- Cited Document 1 hypoiodite is added to a disazo pigment slurry obtained by coupling a tetrazo solution of benzidines and a coupler liquid containing acetoacetanilides, and then fine particles of iodine under acidity.
- a disazo pigment and a method for producing the same have been proposed, in which the pigment slurry is treated by precipitating water.
- Cited Document 2 halogen is added to a disazo pigment slurry obtained by coupling a tetrazo solution of benzidines with a coupler solution containing an excess of acetoacetanilides in terms of chemical theory with respect to the benzidines.
- a process for producing a low amine content disazo pigment, characterized by treating excess acetoacetanilides, and a disazo pigment obtained thereby are proposed.
- Cited Document 3 discloses that a disazo pigment slurry obtained by coupling a tetrazo solution of benzidines with a coupler solution containing a stoichiometric excess of acetoacetanilides with respect to the benzidines contains an oxidizing agent. There has been proposed a method for producing a disazo pigment, which is characterized by decomposing excess acetanilide oxidatively by addition.
- Cited Document 2 is a toxic gas, and attention must be paid to gas leakage for safety.
- the strong oxidizing power of chlorine gas is colorless. Bromine may undergo halogen addition to aromatics in an environment exposed to light. In particular, halogenation is likely to occur in compounds such as phenols, so that the color is affected depending on the amount of side reaction products.
- oxidation with halogen must be performed in an alkaline manner. When decomposing anilides of azo pigments, since the anilides are alkaline and dissolve, the solubility is increased and the decomposition reaction can be efficiently performed.
- the quinacridone pigment contains an aromatic amine and needs to be acidic in order to extract the aromatic amine incorporated into the pigment. Therefore, an oxidizing agent that is acidic and works efficiently is required.
- Cited Document 3 a method of adding hypoiodite at pH 5.5 or lower is shown. However, in this method, an alkali metal salt of iodine ion is formed as a reaction product, and if this remains in the pigment, it may be oxidized to iodine by the outside air or sunlight, which may affect the color.
- a quinacridone pigment having a low content of aromatic primary amine and a production method thereof, further a gravure / flexo ink using the pigment, a colorant for plastic, a paint, a lithographic ink, a toner, It is to provide an inkjet ink.
- quinacridone pigments with at least one solvent selected from water and organic solvents, or at least one solvent selected from quinacridone pigments, water, and organic solvents. It has been found that a quinacridone pigment having a low aromatic primary amine content can be obtained by oxidatively decomposing an aromatic amine by adding an oxidizing agent to the pigment slurry.
- the present invention provides the following inventions.
- a quinacridone pigment having an aromatic primary amine content of 10 ppm or less having an aromatic primary amine content of 10 ppm or less.
- a quinacridone pigment wherein the quinacridone pigment is at least one selected from the general formula (I) or a solid solution composed of at least two of them.
- R1 to R8 each independently represents a hydrogen atom, a halogen atom, a C1 to C6 alkyl group or a C1 to C6 alkoxy group.
- a quinacridone pigment in which the aromatic primary amine is the general formula (II).
- R represents a hydrogen atom, a halogen atom, a C1-C6 alkyl group or a C1-C6 alkoxy group.
- a method for producing a quinacridone pigment comprising washing the quinacridone pigment with at least one solvent selected from water and an organic solvent.
- a method for producing a quinacridone pigment which comprises oxidatively decomposing an aromatic amine by adding an oxidizing agent to a pigment slurry comprising a quinacridone pigment, at least one solvent selected from water and an organic solvent.
- a method for producing a quinacridone pigment wherein the oxidizing agent is at least one selected from nitrous acid and a salt thereof.
- Gravure / flexo inks composed of the quinacridone pigments described above, colorants for plastics, paints, lithographic inks, toners and inkjet inks.
- the gravure / flexo ink, the colorant for plastics, the paint, the lithographic ink, the toner, and the inkjet ink made of the quinacridone pigment obtained by the method for producing the quinacridone pigment described above.
- the quinacridone pigment of the present invention has a very low amount of aromatic primary amine contained in the pigment as very low as 10 ppm or less. Therefore, the quinacridone pigment has an extremely low influence on the human body and can provide a highly safe quinacridone pigment. Have a positive effect.
- the invention of the method for producing a quinacridone pigment of the present invention has a particularly remarkable technical effect that the aromatic primary amine in the quinacridone pigment can be easily reduced.
- the quinacridone pigment of the present invention is a quinacridone pigment having an aromatic primary amine content of 10 ppm or less.
- the quinacridone pigment used in the present invention is an aromatic polycyclic organic pigment, and is used as a versatile color material for gravure / flexo ink, plastic colorants, paints, lithographic inks, toners, inkjet inks, and the like. ing.
- a quinacridone pigment for example, dehydration condensation of succinyl succinic acid diesters and 2 molar equivalents of anilines to form 2,5-dianilino-3,6-dihydroterephthalic acid esters, followed by hydrolysis
- a method is known in which 2,5-dianilinoterephthalic acid is obtained by oxidation and then subjected to intramolecular dehydration and ring closure in a strong acid to obtain unsubstituted quinacridone or substituted quinacridone (acid cyclization method).
- DESS diethyl succinyl succinate
- R represents a hydrogen atom, a halogen atom, a C1-C6 alkyl group or a C1-C6 alkoxy group.
- the dehydration condensation step is performed in the presence of, for example, 2 to 4 mol of aniline and 0.03 to 1.20 mol of an acid catalyst selected from hydrochloric acid, sulfuric acid, or aniline hydrochloride per 1 mol of succinyl succinic diester. It is carried out by heating in an alcohol solvent (see US Pat. No. 2,821,541, JP-A-11-158397).
- 2,5-dianilino-3,6-dihydroterephthalic acid ester obtained in the dehydration condensation step may be 2,5-dianilino-3,6-dihydroterephthalic acid ester or two aniline. A derivative thereof having one or more substituents on at least one of the rings.
- Examples of derivatives include 2,5-di (4-methylanilino) -3,6-dihydroterephthalic acid ester, 2,5-di (4-chloroanilino) -3,6-dihydroterephthalic acid ester, 2,5- Di (3-chloroanilino) -3,6-dihydroterephthalic acid ester, 2,5-di (2-chloroanilino) -3,6-dihydroterephthalic acid ester, 2,5-di (4-methoxyanilino) -3 , 6-dihydroterephthalic acid ester, 2-anilino-5- (4-methylanilino) -3,6-dihydroterephthalic acid ester.
- the hydrolysis and oxidation steps of 2,5-dianilino-3,6-dihydroterephthalic acid esters are carried out by using an oxidizing agent such as oxygen (see JP 2004-292333) or nitrobenzene, sodium nitrobenzenesulfonate in an alkaline alcohol solvent. (See U.S. Pat. No. 3,388,149) by heating in the presence.
- the 2,5-dianilinoterephthalic acid obtained by this hydrolysis and oxidation step is 2,5-dianilinoterephthalic acid corresponding to the aforementioned 2,5-dianilino-3,6-dihydroterephthalic acid ester, 2,5-dianilinoterephthalic acid derivative.
- the intramolecular dehydration and cyclization step of 2,5-dianilinoterephthalic acids is carried out in a dehydrating agent, particularly a strong acid such as polyphosphoric acid, polyphosphoric acid ester, or sulfuric acid.
- a dehydrating agent particularly a strong acid such as polyphosphoric acid, polyphosphoric acid ester, or sulfuric acid.
- Polyphosphoric acid corresponding to a phosphoric acid group content of about 110-120% H3PO4 is particularly preferred.
- the ratio of polyphosphoric acid to terephthalic acid intermediate is typically about 3: 2 to about 10: 1 (preferably 2: 1 to 8: 1). If this ratio is low, very viscous reaction product lumps are produced, which is generally preferred from a cost standpoint.
- the strongly acidic melt is a liquid in which the quinacridone pigment is substantially insoluble, preferably water, a solvent that mixes with water (eg methanol or other lower aliphatic alcohol), or
- the quinacridone pigment is precipitated by adding to the mixture of (i.e., "drown", perform precipitation separation).
- this excess liquid can be added to the acidic melt (eg, US Pat. No. 3,265,699), the present invention is preferably carried out by adding the production melt to a solvent (US Pat. No. 3,265,699). 4, 100, 162).
- a mixture containing 2,5-dialininoterephthalic acid and one or more derivatives thereof, or a mixture containing two or more 2,5-dialininoterephthalic acid derivatives Can also be used.
- the method using such a mixture is a particularly advantageous method for obtaining a solid solution of quinacridone. Mixtures of 2,5-dialininoterephthalic acid and / or its derivatives in combination with fully purified quinacridone pigments (generally in crude form) are often used.
- the intramolecular dealcoholization cyclization step of 2,5-dianilino-3,6-dihydroterephthalic acid ester is performed in, for example, a non-reactive solvent having a boiling point of 225 to 300 ° C. at 225 to 300 ° C. for 45 minutes to 3 hours under oxygen blocking. This is done by heating.
- the 6,13-dihydroquinacridone obtained in this intramolecular dealcoholization ring-closing step may be 6,13-dihydroquinacridone corresponding to the above-described 2,5-dianilino-3,6-dihydroterephthalate, 13-dihydroquinacridone derivative.
- the oxidation step of 6,13-dihydroquinacridone is performed by heating in an alkaline alcohol in the presence of oxygen or an oxidizing agent such as sodium nitrobenzenesulfonate or sodium polysulfide (see, for example, US Pat. No. 2,821,529). .
- the quinacridone pigment obtained by the above method is a compound represented by the above general formula (I) or a solid solution composed of 2 to 3 components thereof.
- the aromatic primary amine contained in the quinacridone pigment is considered to be an aniline which is a raw material of the quinacridone pigment, as well as a reaction intermediate, a decomposition product of the product, and a by-product. It is presumed that a reaction intermediate and a part of the product are decomposed to produce an aromatic primary amine in a high temperature, strong acid, and strong alkaline environment.
- the aromatic primary amine is a compound represented by the general formula (II), and examples thereof include aniline, toluidine, chloroaniline, and methoxyaniline, which vary depending on anilines that are raw materials for producing a quinacridone pigment. .
- the amount of aromatic primary amine contained in the quinacridone pigment obtained as a result is preferably 10 ppm or less, and more preferably close to 0 ppm.
- Washing and removal is a method in which the quinacridone pigment is reduced by extracting the aromatic primary amine from the pigment by using a solvent such as water or an organic solvent at room temperature or warming, and applying pressure or air.
- the solvent that can be used for washing can be arbitrarily selected from solvents that dissolve anilines.
- solvents that dissolve anilines For example, water containing an acid or alcohols such as methanol, isopropanol, and isobutanol, tetrahydrofuran, diethyl ether, etc. Ethers, aprotic polar solvents such as DMF and DMSO, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate and propyl acetate, and aromatic hydrocarbons such as toluene and xylene.
- these mixed solvents can also be used and it can also be set as the mixed solvent of water and a water-insoluble organic solvent.
- any acid to be contained in water any acid can be used as long as it can be dissolved in water to have a pH of less than 7.
- the pH is preferably 5 or less, and more preferably 3 or less.
- the lower the pH the more preferable the solubility of anilines increases, but the problem of corrosion of the production equipment occurs. Therefore, a weak acid can be used by increasing the amount of solvent or increasing the number of washings.
- Extraction of aromatic primary amines from pigments depends on the solubility of the solvent, but in order to extract not only the surface of the pigment particles but also the aromatic primary amines incorporated in the aggregated particles, the mixing efficiency of the pigment and solvent is increased. By extracting the aggregated particles, the extraction speed can be increased.
- various kinds of mixing means known in the art can be used. For example, a stirring blade whose diffusion coefficient increases according to the liquid viscosity, or a baffle is installed in the kettle. Alternatively, a method such as passing the dispersion through a static mixer can be used. Further, by applying ultrasonic waves to the dispersion liquid, the dispersion of the pigment is promoted, and the extraction speed can be increased.
- any surfactant such as an anionic surfactant, a cationic surfactant, and a nonionic surfactant that are generally used can be selected depending on the type of pigment or solvent.
- the extraction rate of the aromatic primary amine can be further increased by incorporating a pigment dispersant in the pigment or pigment dispersion system.
- the pigment dispersant the above-mentioned surfactant plays the same role, but various other pigment derivatives having a structure similar to the pigment skeleton and having a hydrophilic substituent can be used.
- the pigment derivative suitable for the quinacridone pigment a known and commonly used quinacridone derivative can be used, and examples thereof include quinacridone sulfonic acid compounds and phthalimidomethylated quinacridone (see JP 2000-191974 A).
- Decomposition and removal which is another method for reducing aromatic primary amines, is a method in which a quinacridone pigment is dispersed in water, a solvent such as an organic solvent, or an oxidant is added to the dispersion to decompose. Washing and removal requires a large amount of acid-containing water and organic solvent, and there is a problem that a large amount of waste is generated. It is also a matter of course to discharge aromatic primary amines that have harmful effects on the human body. On the other hand, in the removal by decomposition, the amount of the solvent is usually an amount required in production, and since the added oxidant is also a very small amount and the anilines can be converted into a compound having low toxicity, this decomposition removal is preferred industrially. .
- oxidizing agent examples include nitrites such as sodium nitrite and potassium nitrite. Unlike the cited document 2, these oxidizing agents can be handled in a solid or aqueous solution, are safer, and do not affect the hue of the pigment. Moreover, since these oxidizing agents are incorporated in the cycle of nitrifying bacteria, they are expected to be treated in the bacteria treatment even if they flow into the waste water, and the environmental load is low.
- the solvent that can be used for the decomposition can be arbitrarily selected from the solvents used for washing, and a mixture thereof can also be used. From the viewpoint of the solubility of the aromatic primary amine in water, as in the case of washing and removing, when water is used, it is preferable to add an acid to make the pH 5 or less, and more preferably 3 or less.
- nitrite which is an oxidizing agent is hydrophilic, when a mixture of water and a water-insoluble organic solvent is used as a solvent, most of the nitrite is present in the aqueous layer.
- the pH is preferably 5 or less, more preferably 3 or less.
- the decomposition temperature is desirably higher from the viewpoint of increasing the reaction rate, and the temperature may be further increased in a boiling point of a solvent or a pressurized kettle such as an autoclave.
- reaction rate can be improved by increasing the reaction rate of the aromatic primary amine and nitrite as described above, the reaction time is generally required 10 minutes to 10 hours, preferably 10 minutes to 5 hours. is necessary.
- ⁇ Aromatic primary amine measurement method> According to the AP (89) 1 test method (ETAD212), 2 g of pigment was added to a 50 ml plastic bottle, 3 ml of ethanol was added to wet, 30 ml of 1N hydrochloric acid was added, and the mixture was shaken with a paint conditioner for 30 minutes. The pigment was separated by filtration, 10 ml of the filtrate and 10 ml of 4% ammonia / methanol solution were mixed, and HPLC was measured. The PAA concentration was determined from a calibration curve of PAA corresponding to the pigment. The detection limit of this test method depends on the HPLC sensitivity, and as a result of repeated blank measurement, the detection limit in terms of pigment was 200 ppb.
- Example 1 In a 1 L autoclave container, weigh 50 g of the solid solution crude pigment WET cake of unsubstituted quinacridone and 2,9-dimethylquinacridone, and add 159 g of isobutanol and water so that the total amount is 532 g. A slurry was obtained. After adjusting the pH to 7 with a 48% sodium hydroxide aqueous solution, the mixture was heated and stirred at 115 ° C. for 5 hours in an autoclave to form a pigment.
- the mixture was diluted with 92 g of water, adjusted to pH 3 by adding 15% phosphoric acid at 70 ° C., added with 3 g of 40% aqueous sodium nitrite solution, adjusted to pH 3 again, and stirred at 70 ° C. for 1 hour. Thereafter, isobutanol was distilled off by atmospheric distillation, and the resulting slurry was filtered, dried and pulverized to obtain a pigment. According to the test example, the total amount of aniline and p-toluidine in the solid solution pigment was measured and found to be 6 ppm.
- Example 2 In a 1 L autoclave container, weigh 50 g of the solid solution crude pigment WET cake of unsubstituted quinacridone and 2,9-dimethylquinacridone, and add 159 g of isobutanol and water so that the total amount is 532 g. A slurry was obtained. After adjusting to pH 5 by adding 15% phosphoric acid, 3 g of 40% sodium nitrite aqueous solution was added, the pH was adjusted to 3 again, and the mixture was heated and stirred at 115 ° C. for 5 hours in an autoclave for pigmentation.
- Example 3 In a 1 L autoclave container, weigh 50 g of the solid solution crude pigment WET cake of unsubstituted quinacridone and 2,9-dimethylquinacridone, and add 159 g of isobutanol and water so that the total amount is 532 g. A slurry was obtained. After adjusting to pH 3 by adding 15% phosphoric acid, 3 g of 40% sodium nitrite aqueous solution was added, the pH was adjusted to 3 again, and the mixture was heated and stirred at 115 ° C. for 5 hours in an autoclave for pigmentation.
- Example 4 An unsubstituted quinacridone pigment was obtained in the same manner as in Example 2 except that the solid solution crude pigment of unsubstituted quinacridone and 2,9-dimethylquinacridone was replaced with an unsubstituted quinacridone crude pigment.
- the amount of aniline in the unsubstituted quinacridone pigment was measured according to the test example and found to be 2 ppm.
- Example 5 The same procedure as in Example 2 except that the solid solution crude pigment of unsubstituted quinacridone and 2,9-dimethylquinacridone was replaced with 3,10-dichloroquinacridone pigment (including 1,8-dichloroquinacridone and 1,10-dichloroquinacridone). To give 3,10-dichloroquinacridone pigment. According to the test example, the amount of 3-chloroaniline in the 3,10-dichloroquinacridone pigment was measured and found to be 9 ppm.
- Example 6 Into a 1 L beaker, 30 g of a solid solution pigment of unsubstituted quinacridone and 2,9-dimethylquinacridone was weighed, 450 g of 1N hydrochloric acid aqueous solution was added, and stirred at room temperature for 1 hour to obtain a slurry. The slurry was filtered, dried and pulverized to obtain a pigment. The total amount of aniline and p-toluidine in the pigment was measured according to the test example and found to be 6 ppm.
- Example 7 Into a 1 L beaker, 30 g of a solid solution pigment of unsubstituted quinacridone and 2,9-dimethylquinacridone was weighed, 450 g of methanol was added, and stirred at room temperature for 1 hour to obtain a slurry. The slurry was filtered, dried and pulverized to obtain a pigment. The total amount of aniline and p-toluidine in the pigment was measured according to the test example and found to be 1 ppm.
- Example 3 (Comparative Example 1) In Example 3, the same operation was performed without adding an aqueous sodium nitrite solution to obtain a solid solution pigment of unsubstituted quinacridone and 2,9-dimethylquinacridone. According to the test example, the total amount of aniline and p-toluidine in the solid solution pigment was measured and found to be 17 ppm.
- Example 4 (Comparative Example 2) In Example 4, the same operation was carried out without adding the sodium nitrite aqueous solution to obtain an unsubstituted quinacridone pigment.
- the amount of aniline in the pigment measured according to the test example was 19 ppm.
- Example 3 (Comparative Example 3) The same operation was carried out in Example 5 without adding an aqueous sodium nitrite solution to obtain 3,10-dichloroquinacridone pigment. According to the test example, the amount of 3-chloroaniline in the pigment was measured and found to be 42 ppm.
- the quinacridone pigment is washed with at least one solvent selected from water containing an acid and an organic solvent, or the quinacridone pigment is dispersed in at least one solvent selected from water containing an acid and an organic solvent. Then, by oxidatively decomposing the aromatic amine by adding an oxidizing agent, a quinacridone pigment having an aromatic primary amine content reduced to an extremely small amount of 10 ppm or less can be obtained.
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Abstract
Description
し、次いで酸性下、ヨウ素の微細粒子を析出させて顔料スラリーの処理を行うことを特徴とするジスアゾ顔料およびその製造方法が提案されている。
一般式(I)
一般式(II)
また、本発明のキナクリドン顔料の製造方法の発明は、上記したキナクリドン顔料中の芳香族一級アミンを容易に低減化できるという格別顕著な技術的効果を奏する。
一般式(II)
AP(89)1試験法(ETAD212)に準じ、50mlポリ瓶に顔料2gを加え、エタノール3mlを加えて湿潤させ、1N塩酸30mlを加えてペイントコンディショナーで30分間振とうした。顔料を濾別し、濾液10mlと4%アンモニア/メタノール溶液10mlを混合し、HPLCを測定した。顔料に対応するPAAの検量線から、PAA濃度を求めた。尚、本試験法の検出限界はHPLC感度に依存し、ブランクの繰り返し測定の結果、顔料換算の検出限界は200ppbであった。
1Lオートクレーブ容器に無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体粗製顔料のWETケーキを顔料分で50gを計りこみ、159gのイソブタノールと、全量が532gになるように水を加え、撹拌してスラリーとした。48%水酸化ナトリウム水溶液でpH7に調節後、オートクレーブにて115℃で5時間加熱撹拌し、顔料化を行った。水を92g加えて希釈し、70℃にて15%リン酸を加えてpH3に調節後、40%亜硝酸ナトリウム水溶液3g加え、再度pH3に調節し、70℃で1時間撹拌した。その後、常圧蒸留によりイソブタノールを留去し、得られたスラリーをろ過、乾燥、粉砕して顔料を得た。試験例に従って固溶体顔料中のアニリンとp-トルイジンの合計量を測定した結果、6ppmであった。
1Lオートクレーブ容器に無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体粗製顔料のWETケーキを顔料分で50gを計りこみ、159gのイソブタノールと、全量が532gになるように水を加え、撹拌してスラリーとした。15%リン酸を加えてpH5に調節後、40%亜硝酸ナトリウム水溶液3g加え、再度pH3に調節し、オートクレーブにて115℃で5時間加熱撹拌し、顔料化を行った。水を92g加えて希釈し、その後、常圧蒸留によりイソブタノールを留去し、得られたスラリーをろ過、乾燥、粉砕して顔料を得た。試験例に従って固溶体顔料中のアニリンとp-トルイジンの合計量を測定した結果、10ppmであった。
1Lオートクレーブ容器に無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体粗製顔料のWETケーキを顔料分で50gを計りこみ、159gのイソブタノールと、全量が532gになるように水を加え、撹拌してスラリーとした。15%リン酸を加えてpH3に調節後、40%亜硝酸ナトリウム水溶液3g加え、再度pH3に調節し、オートクレーブにて115℃で5時間加熱撹拌し、顔料化を行った。水を92g加えて希釈し、その後、常圧蒸留によりイソブタノールを留去し、得られたスラリーをろ過、乾燥、粉砕して顔料を得た。試験例に従って固溶体顔料中のアニリンとp-トルイジンの合計量を測定した結果、3ppmであった。
無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体粗製顔料を無置換キナクリドン粗製顔料に代えた以外は実施例2と同じ操作により無置換キナクリドン顔料を得た。試験例に従って無置換キナクリドン顔料中のアニリン量を測定した結果、2ppmであった。
無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体粗製顔料を3,10-ジクロロキナクリドン顔料(1,8-ジクロロキナクリドン、1,10-ジクロロキナクリドンを含む)に代えた以外は実施例2と同じ操作により3,10-ジクロロキナクリドン顔料を得た。試験例に従って3,10-ジクロロキナクリドン顔料中の3-クロロアニリン量を測定した結果、9ppmであった。
1Lビーカーに無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体顔料30gを計りこみ、450gの1N塩酸水溶液を加え、室温にて1時間撹拌してスラリーとした。このスラリーをろ過、乾燥、粉砕して顔料を得た。試験例に従って顔料中のアニリンとp-トルイジンの合計量を測定した結果、6ppmであった。
1Lビーカーに無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体顔料30gを計りこみ、450gのメタノールを加え、室温にて1時間撹拌してスラリーとした。このスラリーをろ過、乾燥、粉砕して顔料を得た。試験例に従って顔料中のアニリンとp-トルイジンの合計量を測定した結果、1ppmであった。
実施例3において亜硝酸ナトリウム水溶液を加えずに同じ操作を行い、無置換キナクリドンと2,9-ジメチルキナクリドンの固溶体顔料を得た。試験例に従って固溶体顔料中のアニリンとp-トルイジンの合計量を測定した結果、17ppmであった。
実施例4において亜硝酸ナトリウム水溶液を加えずに同じ操作を行い、無置換キナクリドン顔料を得た。試験例に従って顔料中のアニリン量を測定した結果、19ppmであった。
実施例5において亜硝酸ナトリウム水溶液を加えずに同じ操作を行い、3,10-ジクロロキナクリドン顔料を得た。試験例に従って顔料中の3-クロロアニリン量を測定した結果、42ppmであった。
Claims (8)
- 芳香族一級アミン含有量が10ppm以下のキナクリドン顔料。
- キナクリドン顔料を水および有機溶媒から選ばれる少なくとも一種類の溶媒で洗浄することを特徴とする請求項1~3のいずれか一項に記載のキナクリドン顔料の製造方法。
- キナクリドン顔料と水および有機溶媒から選ばれる少なくとも一種類の溶媒からなる顔料スラリーに、酸化剤の添加により芳香族アミンを酸化分解することを特徴とする請求項1~3のいずれか一項に記載のキナクリドン顔料の製造方法。
- 前記酸化剤が亜硝酸およびその塩から選ばれる少なくとも一種である請求項5記載のキナクリドン顔料の製造方法。
- 請求項1~3のいずれか一項に記載のキナクリドン顔料からなるグラビア・フレキソインキ、プラスチック用着色材、塗料、平版インキ、トナー、インクジェットインキ。
- 請求項4~6のいずれか一項に記載のキナクリドン顔料の製造方法により得られたキナクリドン顔料からなるグラビア・フレキソインキ、プラスチック用着色材、塗料、平版インキ、トナー、インクジェットインキ。
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JP6769577B2 (ja) * | 2018-04-17 | 2020-10-14 | Dic株式会社 | キナクリドン固溶体及びこれを含有するインキ組成物 |
JP6981562B1 (ja) * | 2021-03-11 | 2021-12-15 | 東洋インキScホールディングス株式会社 | グラビア印刷インキセット、印刷物、及び包装材料 |
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