GB1332705A - Azo pigments - Google Patents
Azo pigmentsInfo
- Publication number
- GB1332705A GB1332705A GB5626470A GB5626470A GB1332705A GB 1332705 A GB1332705 A GB 1332705A GB 5626470 A GB5626470 A GB 5626470A GB 5626470 A GB5626470 A GB 5626470A GB 1332705 A GB1332705 A GB 1332705A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solvent
- less
- acid
- azo pigments
- acids
- 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
- C09B41/00—Special methods of performing the coupling reaction
- C09B41/006—Special methods of performing the coupling reaction characterised by process features
- C09B41/009—Diazotising and coupling in one step
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
- Pigments, Carbon Blacks, Or Wood Stains (AREA)
Abstract
1332705 Preparation of azo pigments CIBAGEIGY AG 26 Nov 1970 [27 Nov 1969] 56264/70 Heading C4P Metal-free azo pigments containing no sulphenic acid groups are prepared by adding an ester of nitrous acid at -50‹- + 100‹ C. to an anhydrous reaction mixture comprising (a) a diazotizable amine, (b) a coupling component, (c) an organic acid having- a PKa value of less than 3À0, and (d) one or more organic, non-water soluble solvents having a dielectric constant of less than 15, the molar ratio (c)/(a) being less 'than 1. The solvents used in the process are suitably aliphatic, optionally halogenated hydrocarbons e.g. chloroform and chlorobenzene. Mixtures consisting of a solvent having a boiling point below 90‹ C. and a high boiling solvent having a boiling point above 130‹ C. may also be used. The nitrous acid esters are particularly those of primary or secondary alcohols having 1-10 carbon atoms and may be liquid or gaseous. Suitable organic acids are α-halogenated aliphatic carboxylic acids having 2-6 carbon atoms, preferably polyhalogenated acids e.g. trichloroacetic acid. The pigments produced may be optionally subjected to a heat treatment, either in the solvent in which the process is effected or in a different solvent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1761469A CH530449A (en) | 1969-11-27 | 1969-11-27 | Process for the preparation of azo compounds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1332705A true GB1332705A (en) | 1973-10-03 |
Family
ID=4426758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5626470A Expired GB1332705A (en) | 1969-11-27 | 1970-11-26 | Azo pigments |
Country Status (11)
| Country | Link |
|---|---|
| JP (1) | JPS4813691B1 (en) |
| BE (1) | BE759438A (en) |
| BR (1) | BR7024175D0 (en) |
| CH (1) | CH530449A (en) |
| DE (1) | DE2058299B2 (en) |
| DK (1) | DK130416B (en) |
| ES (1) | ES385923A1 (en) |
| FR (1) | FR2068684B1 (en) |
| GB (1) | GB1332705A (en) |
| NL (1) | NL7017322A (en) |
| ZA (1) | ZA708009B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2603836C3 (en) | 1976-02-02 | 1980-09-04 | Cassella Ag, 6000 Frankfurt | Process for the production of azo dyes |
| US4496481A (en) * | 1980-12-23 | 1985-01-29 | Ciba-Geigy Corporation | Production of azo compounds |
| EP0341325B1 (en) * | 1988-05-07 | 1991-12-11 | BASF Aktiengesellschaft | Process for the manufacture of liquid preparations of basic azodyes |
| EP0341324B1 (en) * | 1988-05-07 | 1991-12-11 | BASF Aktiengesellschaft | Process for the manufacture of colour stable solutions of azo dyes |
| US4952680A (en) * | 1987-04-23 | 1990-08-28 | Basf Aktiengesellschaft | Preparation of stable solutions of azo dyes of m-phenylenediamine by reaction with formic acid |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH514654A (en) * | 1968-05-30 | 1971-10-31 | Ciba Geigy Ag | Process for the production of metal-free azo pigments |
-
0
- BE BE759438D patent/BE759438A/en unknown
-
1969
- 1969-11-27 CH CH1761469A patent/CH530449A/en not_active IP Right Cessation
-
1970
- 1970-11-24 DK DK597270AA patent/DK130416B/en unknown
- 1970-11-26 ZA ZA708009A patent/ZA708009B/en unknown
- 1970-11-26 DE DE2058299A patent/DE2058299B2/en not_active Ceased
- 1970-11-26 ES ES385923A patent/ES385923A1/en not_active Expired
- 1970-11-26 JP JP45103973A patent/JPS4813691B1/ja active Pending
- 1970-11-26 GB GB5626470A patent/GB1332705A/en not_active Expired
- 1970-11-26 NL NL7017322A patent/NL7017322A/xx unknown
- 1970-11-26 FR FR7042525A patent/FR2068684B1/fr not_active Expired
- 1970-11-26 BR BR224175/70A patent/BR7024175D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR2068684A1 (en) | 1971-08-27 |
| DE2058299A1 (en) | 1971-06-03 |
| ES385923A1 (en) | 1973-05-01 |
| DK130416C (en) | 1975-07-14 |
| ZA708009B (en) | 1971-08-25 |
| CH530449A (en) | 1972-11-15 |
| BR7024175D0 (en) | 1973-05-17 |
| NL7017322A (en) | 1971-06-01 |
| DK130416B (en) | 1975-02-17 |
| DE2058299B2 (en) | 1979-02-01 |
| FR2068684B1 (en) | 1975-06-06 |
| JPS4813691B1 (en) | 1973-04-28 |
| BE759438A (en) | 1971-05-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |