GB678492A - New monoazo-dyestuffs of the pyrazolone series and process for their manufacture - Google Patents

New monoazo-dyestuffs of the pyrazolone series and process for their manufacture

Info

Publication number
GB678492A
GB678492A GB27550/50A GB2755050A GB678492A GB 678492 A GB678492 A GB 678492A GB 27550/50 A GB27550/50 A GB 27550/50A GB 2755050 A GB2755050 A GB 2755050A GB 678492 A GB678492 A GB 678492A
Authority
GB
United Kingdom
Prior art keywords
sulphonamide
dyestuffs
pyrazolones
dyeing
chloro
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
GB27550/50A
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.)
BASF Schweiz AG
Original Assignee
Ciba 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 Ciba AG filed Critical Ciba AG
Publication of GB678492A publication Critical patent/GB678492A/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
    • C09B45/00—Complex metal compounds of azo dyes
    • C09B45/02—Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14—Monoazo compounds

Landscapes

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

Abstract

The invention comprises monoazo-pyrazolone dyestuffs, free from carboxylic acid and sulphonic acid groups and of the formula <FORM:0678492/IV (c)/1> where R is a benzene residue containing a sulphonamide substituent -SO2-NR1R2 with or without other substituents, R1 and R2 being hydrogen, alkyl or hydroxyalkyl. These are made by coupling 4-nitro-6-chloro-2-aminophenol with the appropriate pyrazolones. Preferred compounds have R1 a radical of 1-4 carbon atoms and R2 hydrogen. The products can be used for dyeing and printing, and may be metallized in substance, in the dyebath or on the fibre. Examples show the use of the following substituted 1 - phenyl - 3 - methyl - 5 - pyrazolones as coupling components: 31-sulphonamide, 31-sulphomethylamide, 31-sulpho-b -oxyethylamide, 41-sulphonamide, 21-methyl-51-sulphonamide and 21-chloro-51-sulphonamide. Other components are listed. Further examples describe the dyeing of wool with the compounds by the after-chroming and metachrome processes. Specification 254,708, [Class 2 (iii)], is referred to.
GB27550/50A 1949-12-20 1950-11-10 New monoazo-dyestuffs of the pyrazolone series and process for their manufacture Expired GB678492A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH678492X 1949-12-20

Publications (1)

Publication Number Publication Date
GB678492A true GB678492A (en) 1952-09-03

Family

ID=4528301

Family Applications (1)

Application Number Title Priority Date Filing Date
GB27550/50A Expired GB678492A (en) 1949-12-20 1950-11-10 New monoazo-dyestuffs of the pyrazolone series and process for their manufacture

Country Status (1)

Country Link
GB (1) GB678492A (en)

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