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GB727535A - Improvements relating to chromium-containing monoazo dyestuffs and their use - Google Patents

Improvements relating to chromium-containing monoazo dyestuffs and their use

Info

Publication number
GB727535A
GB727535A GB8694/53A GB869453A GB727535A GB 727535 A GB727535 A GB 727535A GB 8694/53 A GB8694/53 A GB 8694/53A GB 869453 A GB869453 A GB 869453A GB 727535 A GB727535 A GB 727535A
Authority
GB
United Kingdom
Prior art keywords
chromium
naphtholdisulphomethylamide
disalicylato
chroming
chromate
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
GB8694/53A
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 GB727535A publication Critical patent/GB727535A/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
    • C09B45/00Complex metal compounds of azo dyes
    • C09B45/02Preparation from dyes containing in o-position a hydroxy group and in o'-position hydroxy, alkoxy, carboxyl, amino or keto groups
    • C09B45/14Monoazo compounds
    • C09B45/16Monoazo compounds containing chromium

Landscapes

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

Abstract

The invention comprises complex chromium compounds of dyes of the formula <FORM:0727535/IV (c)/1> wherein R is hydrogen, halogen, or methyl, which compounds contain at least one chromium atom in complex linkage with two molecules of the dyestuff. They are made by reacting the said dyestuffs with agents giving off chromium under conditions such that two mols. dyestuff combine with at least one chromium atom, before or after application to the fibre. Chroming may be by use of a trivalent chromium salt in organic aqueous solution or an alkali salt of a disalicylato chromate. The products may be mixed with dispersing agents and basic-reacting salts such as trisodium phosphate, and dye wool, silk, nylon, and polyurethane fibres in green-blue shades. In examples, 5-nitro-2-amino-1-hydroxybenzene or its 4-chloro-, 4-bromo-, or 4-methyl derivatives are each diazotized and coupled with 1,3,6 - naphtholdisulphomethylamide, followed by chroming with ammonium disalicylato chromate. A dyeing example using wool is given.ALSO:1,3,6-Naphtholdisulphomethylamide is obtained from 1-acyloxynaphthalene 3,6-disulphonic acid by conversion of the sulphonic groups with phosphorus pentachloride followed by methylamine, and hydrolysis of the acyloxy group.
GB8694/53A 1952-03-28 1953-03-30 Improvements relating to chromium-containing monoazo dyestuffs and their use Expired GB727535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH727535X 1952-03-28

Publications (1)

Publication Number Publication Date
GB727535A true GB727535A (en) 1955-04-06

Family

ID=4532059

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8694/53A Expired GB727535A (en) 1952-03-28 1953-03-30 Improvements relating to chromium-containing monoazo dyestuffs and their use

Country Status (1)

Country Link
GB (1) GB727535A (en)

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