GB701709A - Process for the preparation of polyazo dyestuffs - Google Patents

Process for the preparation of polyazo dyestuffs

Info

Publication number
GB701709A
GB701709A GB14763/51A GB1476351A GB701709A GB 701709 A GB701709 A GB 701709A GB 14763/51 A GB14763/51 A GB 14763/51A GB 1476351 A GB1476351 A GB 1476351A GB 701709 A GB701709 A GB 701709A
Authority
GB
United Kingdom
Prior art keywords
acid
toluidine
naphthylamine
disulphonic acid
aminoazobenzene
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
GB14763/51A
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.)
Sandoz AG
Original Assignee
Sandoz 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 Sandoz AG filed Critical Sandoz AG
Publication of GB701709A publication Critical patent/GB701709A/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Luminescent Compositions (AREA)

Abstract

The invention comprises disazo and polyazo dyestuffs of the formula <FORM:0701709/IV(c)/1> where x and y are 0 or 1, A is hydrogen or methyl and R1, R2, R3 and R4 are benzene or naphthalene nuclei which contain at least four solubilizing groups and may be further substituted, e.g. with halogen, alkyl, alkoxy, acylamino or nitro groups, but do not contain a hydroxy and another metalizable group adjacent to the same azo group. These are made by acylating the appropriate aminoazo compounds with a dichloride or dibromide of an acid HOCO-CH=CA-COOH, preferably in an aqueous medium in the presence of an acid binding agent; such acids are fumaric, maleic, citraconic and mesaconic. The products dye cotton and regenerated cellulose dischargeable yellow or brown shades. In the examples the following dyestuffs are acylated with fumaric chloride: (1) 2-naphthylamine-4 : 8-disulphonic acid-->acetyl m-phenylene diamine; (2) 4-aminoazobenzene-3 : 4\sv-disulphonic acid-->m-toluidine; (3) 2-naphthylamine-6 : 8-disulphonic acid-->m-toluidine-->cresidine; (4) 4-aminoazobenzene-3 : 4\sv-disulphonic acid -->m-toluidine-->acetyl-m-phenylene diamine; (5) disazo dyestuff of (2) p-nitrobenzoylated and reduced; (6) sulphanilic acid-->1-naphthylamine-6-sulphonic acid-->m-toluidine. Other suitable components are mentioned. Specifications 418,295 and 643,046 are referred to.
GB14763/51A 1950-06-23 1951-06-21 Process for the preparation of polyazo dyestuffs Expired GB701709A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH701709X 1950-06-23

Publications (1)

Publication Number Publication Date
GB701709A true GB701709A (en) 1953-12-30

Family

ID=4530084

Family Applications (1)

Application Number Title Priority Date Filing Date
GB14763/51A Expired GB701709A (en) 1950-06-23 1951-06-21 Process for the preparation of polyazo dyestuffs

Country Status (1)

Country Link
GB (1) GB701709A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194883A (en) 1974-12-20 1980-03-25 Hoechst Aktiengesellschaft Water-soluble disazo dyestuffs and process for coloring synthetic polyamide fibres with them

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4194883A (en) 1974-12-20 1980-03-25 Hoechst Aktiengesellschaft Water-soluble disazo dyestuffs and process for coloring synthetic polyamide fibres with them

Similar Documents

Publication Publication Date Title
GB701709A (en) Process for the preparation of polyazo dyestuffs
US2077322A (en) Process for the manufacture of azo dyestuffs for esters of cellulose and azo dyestuffs obtained therefrom
US2191800A (en) Azo compounds
GB779487A (en) Manufacture of polyazo-dyestuffs
US2191801A (en) Polyazo dye compounds
GB905040A (en) Disazo dyestuffs insoluble in water and process for their manufacture
US1913384A (en) Trisazo dyestuff and process of preparing the same
US2297801A (en) Azo dyes
US2420008A (en) Disazo dyes containing higher acylamino group
US2155685A (en) Azo dyes
GB1117938A (en) New disazo dyestuffs containing a di(cyanoethyl) group and their application to the dyeing of synthetic fibres
US2163251A (en) Azo dyestuffs
US1965201A (en) Azo dyes and methods for their preparation
US2161638A (en) Azo dyes
US2117425A (en) Azo dyes
GB259970A (en) The manufacture of new azo dyestuffs
GB692465A (en) Metallisable disazo dyestuffs
GB868745A (en) Water-soluble monoazo dyestuffs and their production
GB253457A (en) The manufacture of new monoazodyestuffs
GB922829A (en) Improvements relating to water-soluble reactive dyestuffs containing acylamino groups and their use
GB740715A (en) Azo dyes and processes for their manufacture
GB1106048A (en) Disazo dyes containing a heterocyclic residue and free from sulphonic acid groups
GB632944A (en) Manufacture of disazo dyestuffs of the pyrazolone series
GB491793A (en) Improvements in the manufacture and production of azo dyestuffs
GB729156A (en) Improvements in colouring compositions and the printing of cellulosic textile materials therewith