ES421644A1 - Disazo dyestuffs - Google Patents

Disazo dyestuffs

Info

Publication number
ES421644A1
ES421644A1 ES421644A ES421644A ES421644A1 ES 421644 A1 ES421644 A1 ES 421644A1 ES 421644 A ES421644 A ES 421644A ES 421644 A ES421644 A ES 421644A ES 421644 A1 ES421644 A1 ES 421644A1
Authority
ES
Spain
Prior art keywords
sulfonic acid
free
coupling component
coupling
groups
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
ES421644A
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.)
Bayer AG
Original Assignee
Bayer 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 Bayer AG filed Critical Bayer AG
Publication of ES421644A1 publication Critical patent/ES421644A1/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
    • C09B35/00—Disazo and polyazo dyes of the type A<-D->B prepared by diazotising and coupling
    • C09B35/02—Disazo dyes
    • C09B35/039—Disazo dyes characterised by the tetrazo component
    • C09B35/24—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of a diaryl amine

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Coloring (AREA)

Abstract

Procedure for the production of disazo dyes, which in free acid form correspond to the formula **(See formula)** in which K represents the rest of a coupling component free of azo groups, characterized in that the tetrazotized 4,4'-diaminodiphenylamino-2-sulfonic acid is subjected to the coupling in an acidic medium, in the molar ratio of 1: 1, with 2-amino-8-hydroxynaphthalene-6-sulfonic acid and subsequently, preferably in a weakly acidic to alkaline medium, with a coupling component free from azoic groups. (Machine-translation by Google Translate, not legally binding)
ES421644A 1972-12-21 1973-12-20 Disazo dyestuffs Expired ES421644A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722262675 DE2262675A1 (en) 1972-12-21 1972-12-21 DISAZO DYES

Publications (1)

Publication Number Publication Date
ES421644A1 true ES421644A1 (en) 1976-03-16

Family

ID=5865096

Family Applications (1)

Application Number Title Priority Date Filing Date
ES421644A Expired ES421644A1 (en) 1972-12-21 1973-12-20 Disazo dyestuffs

Country Status (11)

Country Link
JP (2) JPS4990328A (en)
AR (1) AR196961A1 (en)
BE (1) BE808820A (en)
BR (1) BR7309980D0 (en)
CH (2) CH567620B5 (en)
DE (1) DE2262675A1 (en)
ES (1) ES421644A1 (en)
FR (1) FR2211509B1 (en)
GB (1) GB1404090A (en)
IT (1) IT1001269B (en)
NL (1) NL7317325A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE57857C (en) * LEOPOLD CAS-SELLA & CO. in Frankfurt a. M Process for the preparation of disazo dyes from amidonaphthol sulfonic acid
DE528891C (en) * 1928-09-12 1931-07-04 Ici Ltd Process for dyeing regenerated cellulose

Also Published As

Publication number Publication date
BR7309980D0 (en) 1974-09-24
JPS4990328A (en) 1974-08-29
GB1404090A (en) 1975-08-28
CH1777773A4 (en) 1975-05-15
NL7317325A (en) 1974-06-25
CH567620B5 (en) 1975-10-15
AR196961A1 (en) 1974-02-28
FR2211509B1 (en) 1977-08-12
DE2262675A1 (en) 1974-06-27
JPS4987874A (en) 1974-08-22
IT1001269B (en) 1976-04-20
BE808820A (en) 1974-06-19
FR2211509A1 (en) 1974-07-19

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