ES385923A1 - Azo pigments - Google Patents

Azo pigments

Info

Publication number
ES385923A1
ES385923A1 ES385923A ES385923A ES385923A1 ES 385923 A1 ES385923 A1 ES 385923A1 ES 385923 A ES385923 A ES 385923A ES 385923 A ES385923 A ES 385923A ES 385923 A1 ES385923 A1 ES 385923A1
Authority
ES
Spain
Prior art keywords
less
free
amine
water
organic
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
ES385923A
Other languages
Spanish (es)
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.)
Novartis AG
Original Assignee
JR Geigy AG
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 JR Geigy AG filed Critical JR Geigy AG
Publication of ES385923A1 publication Critical patent/ES385923A1/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
    • 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)
  • Pigments, Carbon Blacks, Or Wood Stains (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)

Abstract

Procedure for the preparation of metal-free and sulfonic acid group-free azo compounds, by diazoation and coupling in organic solvents, characterized in that a water-free reaction mixture, consisting of a diazolated amine, a coupling component, a organic acid with a pKa value of less than 3.0 at a dose of less than 1 mol calculated on one mole of the amine and an organic solvent, insoluble in water with a dielectric constant less than 15 or a mixture of such solvents, is add a nitrous acid ester at a temperature between -50ºc and + 100ºC. (Machine-translation by Google Translate, not legally binding)
ES385923A 1969-11-27 1970-11-26 Azo pigments Expired ES385923A1 (en)

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
ES385923A1 true ES385923A1 (en) 1973-05-01

Family

ID=4426758

Family Applications (1)

Application Number Title Priority Date Filing Date
ES385923A Expired ES385923A1 (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)

* Cited by examiner, † Cited by third party
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
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
EP0341325B1 (en) * 1988-05-07 1991-12-11 BASF Aktiengesellschaft Process for the manufacture of liquid preparations of basic azodyes

Family Cites Families (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DK130416C (en) 1975-07-14
GB1332705A (en) 1973-10-03
CH530449A (en) 1972-11-15
ZA708009B (en) 1971-08-25
NL7017322A (en) 1971-06-01
BR7024175D0 (en) 1973-05-17
DE2058299A1 (en) 1971-06-03
FR2068684B1 (en) 1975-06-06
BE759438A (en) 1971-05-26
JPS4813691B1 (en) 1973-04-28
DE2058299B2 (en) 1979-02-01
DK130416B (en) 1975-02-17
FR2068684A1 (en) 1971-08-27

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