Classifications

• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D235/00—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings
  • C07D235/02—Heterocyclic compounds containing 1,3-diazole or hydrogenated 1,3-diazole rings, condensed with other rings condensed with carbocyclic rings or ring systems
  • C07D235/04—Benzimidazoles; Hydrogenated benzimidazoles
  • C07D235/24—Benzimidazoles; Hydrogenated benzimidazoles with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached in position 2
  • C07D235/26—Oxygen atoms
• • 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
  • C09B29/00—Monoazo dyes prepared by diazotising and coupling
  • C09B29/32—Monoazo dyes prepared by diazotising and coupling from coupling components containing a reactive methylene group
• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
  • D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
  • D06P1/02—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes
  • D06P1/04—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes not containing metal

Definitions

• Water-insoluble monoazo dyestuffs consisting of amino-isophthalic-acid-dimethylester as diazo component and 5 acetoacetylamino benzimidazolones as coupling component and process for their preparation.
• Said pigments are especially suitable for dyeing and printing plastics, caoutchouc, resins of natural or synthetic origin, fibrous textile materials or paper.
• the pigments can be used for the preparation of dispersion paints, lacquers and printing inks.
• the present invention relates to new, and valuable, water-insoluble monoazo dyestuffs that correspond to the formula wherein R represents a hydrogen or halogen atom, such as chlorine or bromine, a methyl, methoxy or ethoxy group and to a process for their preparation which comprises diazotizing S-aminoisophthalic dimethyl ester and coupling it with 5-acetoacetyl-benzimidazolones of the general formula wherein R is defined as above
• the diazo component may be produced by known methods, for example by esterification of S-nitroisophthalic acid with methanol and subsequent reduction.
• the coupling components are advantageously prepared by reacting the corresponding aminobenzimidazolones with diketone either in water or an organic solvent, for example glacial acetic acid.
• the coupling reaction may proceed in known manner, especially in an aqueous medium, advantageously in the presence of a non-ionic, anionic or cationic dispersing agent.
• the coupling mixture is usefully heated for some time, for example to the boil or maintained under pressure at temperatures above 100 C., if desired, in the presence of an organic segment, for example dichlorobenzene or resin soap.
• the dyestuffs of the invention are, after the coupling, conveniently suction-filtered and heated as moist presscakes, or dried or pulverized, with organic solvents such United States Patent 0 "Ice as pyridine, dimethyl formamide, alcohol, glacial acetic acid, glycolmonoethyl ether, chlorobenzene or glycol either under reflux or under superatmospheric pressure at a raised temperature.
• organic solvents such United States Patent 0 "Ice as pyridine, dimethyl formamide, alcohol, glacial acetic acid, glycolmonoethyl ether, chlorobenzene or glycol either under reflux or under superatmospheric pressure at a raised temperature.
• the dyestuffs may also be prepared in the presence of a carrier material, for example barium sulfate.
• the new pigment dyestuffs are suitable for producing printing inks, colored lacquers or dispersion paints, for coloring caoutchouc, plastics or resins of natural or synthetic origin. They are convenient as well for pigment printing on a substrate, particularly on textile fibrous materials or other structures having a flat surface, for example paper. They may serve for yet other uses, for example in a finely divided form for spin-coloration of viscose rayon, cellulose ethers or esters, polyamides, polyurethanes, polyglycolterephthalates or polyacrylonitrile or for dyeing paper.
• the new dyestuffs are easy to work in the above-mentioned media.
• the obtained dyeings exhibit good fastness to light, weathering and migration and are resistant to the action of chemicals, for example solvents.
• EXAMPLE 1 20.9 parts of S-amino-isophthalic acid dimethyl ester were stirred together for about one hour with parts by volume of 5 N hydrochloric acid. The solution was subsequently diluted with 300 parts by volume of water, diazotized at 10 C. with 20 parts by volume of 5-normal sodium nitrite solution, and clarified with kieselguhr. A possible excess of nitrous acid was eliminated with amidosulfonic acid.
• the coupling reaction was instantly complete.
• the coupling mixture was heated to the boil, the product isolated by suction-filtration thoroughly washed with water and dried at 60.
• the resulting yellow pigment was pulverized and heated for 4 hours at C. with 450 parts by volume of dimethyl formamide. Then it was suctionfiltered, washed with methanol until free from dimethylformamide and dried.
• a yellow soft-grained pigment of high tinctorial power was obtained having a pure tint.
• Incorporated in polyvinyl chloride, a lacquer, a printing ink or a dispersion paint it yielded yellow dyeing very fast to light, overvarnishing and bleeding in polyvinyl chloride.
• dimethyl formamide there may as well be used an equal amount of pyridine or glacial acetic acid in which case the mixture was heated for 4 hours under reflux.
• polyvinyl chloride The incorporation into polyvinyl chloride proceeded for example according to the following method: 16.5 parts of a plasticizer mixture consisting of equal parts of dioctylphthalate and dibutylphthalate were mixed with 0.05 part of dyestulf and 0.25 part of titanium dioxide. Then 33.5 parts of polyvinyl chloride were added. The mixture was friction-rolled for 10 minutes on a doubleroller mill, the formed film being continuously cut out with a spatula and rolled up. During the processing a temperature of 40 C. was maintained in one roller while the other was kept at 140. The mixture was subsequently stripped off as a film and pressed for minutes at 160 C. between two polished metal plates.
• EXAMPLE 2 The coupling was performed as disclosed in Example 1, however the coupling mixture was, after completion of the reaction, adjusted to a pH value between 6.5 and 7, placed in a closed vessel and heated for 7 hours at 150 C. The product was then suction filtered, washed and dried. A yellow pigment was obtained having, practically analogous, very good fastness properties as the dyestulf of Example 1.
• EXAMPLE 3 The coupling was conducted as disclosed in Example 1. After completion of the coupling reaction the dyestuff was suction-filtered and washed with water, stirred moist with 300 parts of ethyl alcohol, heated for 5 hours in a closed vessel, at 150 C., cooled, washed with water and dried. The resulting yellow pigment practically corresponded in respect to fastness to the dyestulf obtained according to Example 1.
• S-aminoisophthalic acid dimethyl ester 20.9 parts were diazotized as disclosed in Example 1. 24 parts of S-acetoacetylamino benzene were dissolved according to the mentioned example and clarified with charcoal. The clarified solution was run at room temperature into a solution consisting of 300 parts by volume of water, 1.5 parts of oleylamine acetate, 41 parts by volume of glacial acetic acid and 80 parts by volume of 5-norma1 sodium hydroxide solution. The resulting suspension was heated to 60 C. at which temperature it was coupled with the diazo solution.
• EXAMPLE 5 20.9 parts of S-amino-isophthalic acid dimethyl ester were stirred for about one hour with 80 parts by volume of S-normal hydrochloric acid and subsequently diluted with 300 parts by volume of water. The mixture was diazotized at C. with parts by volume of S-normal sodium nitrite solution and clarified with kieselguhr. A possible excess of nitrous acid was removed with a small amount of amido-sulfonic acid.
• the diazo solution was introduced at about 20 C. while stirring thoroughly into an acetic acid suspension of the coupling component prepared as follows:
• the coupling was instantly complete.
• the coupling mixture was heated to the boil, the product separated by suction-filtration, thoroughly washed with water and dried at 60 C.
• the obtained yellow pigment was pulverized and heated for 4 hours at C. with 450 parts by volume of dimethylformamide.
• the dyestuff was subsequently suction-filtered, washed with methanol until free from dimethylformamide and dried.
• a yellow soft-grained pigment of good tinctorial power and pure tint was obtained.
• Incorporated in polyvinyl chloride, a lacquer, a printing ink or a dispersion paint it yielded yellow dyeings of a good fastness to light, overvarnishing and bleeding in polyvinyl chloride.
• dimethyl formamide an equivalent amount by weight of pyridine or glacial acetic acid may be used in which case the mixture was heated for 4 hours under reflux.
• EXAMPLE 6 The coupling reaction was conducted as disclosed in Example 5, however, the coupling mixture was after completion of the reaction, adjusted with dilute sodium hydroxide solution to a pH of 6.5 to 7, placed in a closed vessel and heated for 7 hours at C., whereupon the dyestuif was suction-filtered, washed and dried. There resulted a yellow pigment having, practically, the same outstanding fastness properties as the dyestutf of Example 5.
• EXAMPLE 7 The coupling was performed as disclosed in Example 5. After completion of the coupling reaction the dyestuff was suction-filtered and washed with water. It was stirred moist with 300 parts of ethyl alcohol and heated for 5 hours at 150 C. in a closed vessel, cooled, washed with water and dried. The resulting yellow pigment practically corresponded in regard to fastness to the dyestuff prepared according to Example 5.
• EXAMPLE 8 20.9 parts of S-aminophthalic acid dimethyl ester were diazotized in accordance with Example 5. 26.1 parts of 6-chloro 5-acetoacetylamino benzimidazolone were dissolved according to the same example and clarified with charcoal. The clarified solution was introduced at room temperature into a solution of 1.5 parts of oleylaminoacetate, 41 parts by volume of glacial acetic acid and 80 parts by volume of S-normal sodium hydroxide solution in 300 parts by volume of water. The obtained suspension was heated to 60" C. at which temperature it was coupled with the diazo solution.

Landscapes

• Chemical & Material Sciences (AREA)
• Organic Chemistry (AREA)
• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Coloring (AREA)
• Inks, Pencil-Leads, Or Crayons (AREA)
• Compositions Of Macromolecular Compounds (AREA)
• Paints Or Removers (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7106687

Family Applications (2)

Family Applications After (1)

Country Status (7)

Families Citing this family (7)

• 1967
  • 1967-10-27 DE DE19671644231 patent/DE1644231A1/de active Pending
• 1968
  • 1968-08-02 DE DE19681795051 patent/DE1795051A1/de active Pending
  • 1968-10-23 NL NL6815145.A patent/NL156433B/xx not_active IP Right Cessation
  • 1968-10-25 DK DK517868A patent/DK132763C/da active
  • 1968-10-25 GB GB50687/68A patent/GB1216356A/en not_active Expired
  • 1968-10-28 BE BE723012D patent/BE723012A/xx not_active IP Right Cessation
  • 1968-10-28 FR FR1590042D patent/FR1590042A/fr not_active Expired
• 1971
  • 1971-03-23 US US27576D patent/USRE27576E/en not_active Expired
  • 1971-03-23 US US27575D patent/USRE27575E/en not_active Expired

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