GB557415A - Manufacture of azo pigments - Google Patents
Manufacture of azo pigmentsInfo
- 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
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.
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)
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 |
-
1942
- 1942-04-17 GB GB510542A patent/GB557415A/en not_active Expired
Cited By (3)
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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