GB808798A - Polyazo dyestuffs - Google Patents

Polyazo dyestuffs

Info

Publication number
GB808798A
GB808798A GB15825/57A GB1582557A GB808798A GB 808798 A GB808798 A GB 808798A GB 15825/57 A GB15825/57 A GB 15825/57A GB 1582557 A GB1582557 A GB 1582557A GB 808798 A GB808798 A GB 808798A
Authority
GB
United Kingdom
Prior art keywords
cooh
dyestuffs
formula
cotton
sulphonaphthyl
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
GB15825/57A
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 GB808798A publication Critical patent/GB808798A/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09BORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B43/00Preparation of azo dyes from other azo compounds
    • C09B43/08Preparation of azo dyes from other azo compounds by reduction
    • C09B43/10Preparation of azo dyes from other azo compounds by reduction with formation of a new azo or an azoxy bridge

Landscapes

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

Abstract

The invention comprises dyestuffs of formula <FORM:0808798/IV (c)/1> where X is an aryl radicle and 2 is a metal complex forming group. They are made by treating compounds of formula <FORM:0808798/IV (c)/2> with reducing agents such as glucose, arsenious acid or formaldehyde; Z is specified as-COOH, -OH, -OCH3 or -OCH2COOH. The nitro monoazo starting materials are made by coupling appropriate nitroanilines and pyrazolones. The products dye cotton and regenerated cellulose in red shades which may be after-coppered. Examples are provided of the preparation of the dyestuffs in which X is phenyl and -(81-sulphonaphthyl-21) and Z is COOH and -OCH2-COOH and their use in dyeing cotton by an after-coppering process.
GB15825/57A 1956-06-06 1957-05-17 Polyazo dyestuffs Expired GB808798A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE808798X 1956-06-06

Publications (1)

Publication Number Publication Date
GB808798A true GB808798A (en) 1959-02-11

Family

ID=6723167

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15825/57A Expired GB808798A (en) 1956-06-06 1957-05-17 Polyazo dyestuffs

Country Status (1)

Country Link
GB (1) GB808798A (en)

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