GB620257A - Process for the preparation of new disazo dyestuffs - Google Patents
Process for the preparation of new disazo dyestuffsInfo
- Publication number
- GB620257A GB620257A GB114247A GB114247A GB620257A GB 620257 A GB620257 A GB 620257A GB 114247 A GB114247 A GB 114247A GB 114247 A GB114247 A GB 114247A GB 620257 A GB620257 A GB 620257A
- Authority
- GB
- United Kingdom
- Prior art keywords
- dyestuffs
- anisidine
- phosgene
- alkoxy
- alkyl
- 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
- C09B43/00—Preparation of azo dyes from other azo compounds
- C09B43/12—Preparation of azo dyes from other azo compounds by acylation of amino groups
- C09B43/136—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents
- C09B43/14—Preparation of azo dyes from other azo compounds by acylation of amino groups with polyfunctional acylating agents with phosgene or thiophosgene
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Diazo dyes are manufactured by the action of phosgene on aminoazo dyestuffs of the general formula <FORM:0620257/IV (c)/1> wherein Z represents hydrogen, alkyl or alkoxy, and Y hydrogen, alkyl, alkoxy or acylamines. The products yield on cotton or regenerated cellulose yellow to orange dyeings which are readily dischargeable and which may be after-treated with copper-yielding substances, particularly those of neutral reaction, or with water-soluble high molecular polyamino or polymino compounds which have the property of improving the wet fastness of substantive dyestuffs, especially good results being obtained by a combination of both treatments. Examples describe the treatment with phosgene, in a neutral or weakly alkaline solution or in a solution made acid with acetic acid, of the dyestuffs 4-amino-6-sulphosalicylic acid --> o- or m-toluidine, o-anisidine, 2 : 5-dimethylaniline, 2-methoxy-5-methylaniline, 3-acetylaminoaniline or 3-acetylamino-6-methoxyaniline. The dyestuffs from m-anisidine and from 2 : 5-dimethoxyaniline are also specified as starting materials.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH939702X | 1946-01-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB620257A true GB620257A (en) | 1949-03-22 |
Family
ID=4549318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB114247A Expired GB620257A (en) | 1946-01-14 | 1947-01-13 | Process for the preparation of new disazo dyestuffs |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE909242C (en) |
FR (1) | FR939702A (en) |
GB (1) | GB620257A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE915381C (en) * | 1951-05-25 | 1954-07-22 | Ciba Geigy | Process for the preparation of unsymmetrical urea derivatives of monoazo dyes |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE446496C (en) * | 1925-02-05 | 1927-07-02 | I G Farbenindustrie Akt Ges | Process for the production of azo dyes |
FR924233A (en) * | 1945-04-27 | 1947-07-30 | Ciba Geigy | Process for the preparation of intermediates which can be used for the preparation of azo dyes |
-
1947
- 1947-01-13 GB GB114247A patent/GB620257A/en not_active Expired
- 1947-01-13 FR FR939702D patent/FR939702A/en not_active Expired
-
1951
- 1951-03-30 DE DES22541A patent/DE909242C/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE915381C (en) * | 1951-05-25 | 1954-07-22 | Ciba Geigy | Process for the preparation of unsymmetrical urea derivatives of monoazo dyes |
Also Published As
Publication number | Publication date |
---|---|
FR939702A (en) | 1948-11-23 |
DE909242C (en) | 1954-04-15 |
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