GB557415A - Manufacture of azo pigments - Google Patents

Manufacture of azo pigments

Info

Publication number
GB557415A
GB557415A GB510542A GB510542A GB557415A GB 557415 A GB557415 A GB 557415A GB 510542 A GB510542 A GB 510542A GB 510542 A GB510542 A GB 510542A GB 557415 A GB557415 A GB 557415A
Authority
GB
United Kingdom
Prior art keywords
nitro
diazotized
parts
acetoacetanilide
solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB510542A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RAYMOND ERNEST FAIRBAIRN
RONALD STEPHEN NEAL
Imperial Chemical Industries Ltd
Original Assignee
RAYMOND ERNEST FAIRBAIRN
RONALD STEPHEN NEAL
Imperial Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by RAYMOND ERNEST FAIRBAIRN, RONALD STEPHEN NEAL, Imperial Chemical Industries Ltd filed Critical RAYMOND ERNEST FAIRBAIRN
Priority to GB510542A priority Critical patent/GB557415A/en
Publication of GB557415A publication Critical patent/GB557415A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C09B67/0046—Mixtures of two or more azo dyes
    • C09B67/0051—Mixtures of two or more azo dyes mixture of two or more monoazo dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)

Abstract

557,415. Dyes. FAIRBAIRN, R. E., NEAL, R. S., and IMPERIAL CHEMICAL INDUSTRIES, Ltd. April 17, 1942, No. 5105. [Class 2 (iii)] Azo dye pigments are obtained by coupling diazotized 3-nitro-4-aminotoluene with acetoacetanilide and immediately mixing the precipitated product in aqueous suspension with the pigment 3-nitro-4-aminoanisole # acetoacetanilide, molecular proportion of the 3-nitro-4- aminoanisole constituting from 5 to 70 per cent., and preferably 17.5 per cent. of the diazo components used. The said dyestuff may be added to or formed in the coupling medium before, during or immediately after the coupling operation. The products are reddish yellow pigments, redder in shade than the pigment, 3-nitro-4-aminotoluene # acetoacetanilide, and of greater tinctorial strength than the product obtainable by mechanical admixture of the two pigments. In examples, (1) a solution of diazotized 3-nitro-4-aminotoluene (128 parts) is mixed with a solution of diazotized 3-nitro- 4-aminoanisole (30 parts), the mixture is stirred into a suspension of acetoacetanilide in an aqueous solution of sodium acetate and the precipitate is filtered off, washed and dried ; (2) and (3) solutions of diazotized 3-nitro-4- aminotoluene (128 parts) and diazotized 3-nitro- 4-aminoanisole (30 parts) are stirred successively (2) in that order, (3) in the reverse order, into a similar suspension of acetoacetanilide and the precipitate filtered off, washed and dried ; (4) a solution of a diazotized mixture of 3- nitro-4-aminotoluene (128 parts) and 3-nitro-4- aminoanisole (30 parts) is stirred into a suspension of acetoacetanilide in an aqueous solution of sodium acetate and the precipitate is filtered off, washed and dried ; (5) a solution of diazotized 3-nitro-4-aminotoluene (144.4 parts) is mixed with a solution of diazotized 3-nitro-4- aminoanisole (8.4 parts), the mixture is stirred into a suspension of acetoacetanilide in an aqueous solution of sodium acetate and the precipitate is filtered off, washed and dried ; (6) a solution of diazotized 3-nitro-4-aminotoluene (76 parts) is mixed with a solution of diazotized 3-nitro-4-aminoanisole (84 parts), the mixture is stirred into a suspension of acetoacetanilide in an aqueous solution of sodium acetate and the precipitate is filtered off, washed and dried. Specification 517,456 is referred to.
GB510542A 1942-04-17 1942-04-17 Manufacture of azo pigments Expired GB557415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB510542A GB557415A (en) 1942-04-17 1942-04-17 Manufacture of azo pigments

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB510542A GB557415A (en) 1942-04-17 1942-04-17 Manufacture of azo pigments

Publications (1)

Publication Number Publication Date
GB557415A true GB557415A (en) 1943-11-19

Family

ID=9789815

Family Applications (1)

Application Number Title Priority Date Filing Date
GB510542A Expired GB557415A (en) 1942-04-17 1942-04-17 Manufacture of azo pigments

Country Status (1)

Country Link
GB (1) GB557415A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457783A (en) * 1981-10-31 1984-07-03 Ciba-Geigy Corporation Stabilized opaque form of C.I. Pigment Yellow 74
WO2000026303A1 (en) * 1998-10-31 2000-05-11 Ciba Specialty Chemicals Holding Inc. Solid solutions of monoazo pigments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4457783A (en) * 1981-10-31 1984-07-03 Ciba-Geigy Corporation Stabilized opaque form of C.I. Pigment Yellow 74
WO2000026303A1 (en) * 1998-10-31 2000-05-11 Ciba Specialty Chemicals Holding Inc. Solid solutions of monoazo pigments
US6482257B1 (en) 1998-10-31 2002-11-19 Ciba Specialty Chemicals Corporation Solid solutions of monoazo pigments

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