GB265553A - Improvements in tetrakisazo dyes, and the process of manufacture - Google Patents

Improvements in tetrakisazo dyes, and the process of manufacture

Info

Publication number
GB265553A
GB265553A GB32187/26A GB3218726A GB265553A GB 265553 A GB265553 A GB 265553A GB 32187/26 A GB32187/26 A GB 32187/26A GB 3218726 A GB3218726 A GB 3218726A GB 265553 A GB265553 A GB 265553A
Authority
GB
United Kingdom
Prior art keywords
methyl
sodium
pyrazolone
toluidine
coupling
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
GB32187/26A
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.)
NEWPORT CO
Original Assignee
NEWPORT CO
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 NEWPORT CO filed Critical NEWPORT CO
Publication of GB265553A publication Critical patent/GB265553A/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
    • C09B31/00—Disazo and polyazo dyes of the type A->B->C, A->B->C->D, or the like, prepared by diazotising and coupling
    • C09B31/30—Other polyazo dyes

Landscapes

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

Abstract

265,553. Newport Co., (Assignees of Oesch, J. B.). Feb. 6, 1926, [Convention date]. Tetrakisazo dyes are made by coupling a diazotized aminoazo body of the benzene series, containing one or two sulphonic groups and two to four methyl groups, with m-toluidine, rediazotizing and again coupling with m-toluidine, and rediazot.izing the trisazo dye thus formed and coupling with 1-phenyl-3-methyl-5-pyrazolone or a substitution product, particularly a sulphonic acid thereof. The products dye unmordanted cotton orange to brown shades of great fastness to light. In an example, sodium aminoazotoluene disulphonate used as the first component, and 1- p-sulphophenyl-3-methyl-5-pyrazolone (sodium salt) as end component. Strong reducing agents split up the dyestuff at the azo groups, yielding sodium 2-toluidine-5-sulphonate, sodium 2 : 5- diaminotoluene-3-sulphonate, methyl-p-phenylenediamine, and 1-p-sulphophenyl-3-methyl-4- amino-5-pyrazolone. Specifi cation 208,265 is referred to.
GB32187/26A 1926-02-06 1926-12-20 Improvements in tetrakisazo dyes, and the process of manufacture Expired GB265553A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US265553XA 1926-02-06 1926-02-06

Publications (1)

Publication Number Publication Date
GB265553A true GB265553A (en) 1928-03-20

Family

ID=21832480

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32187/26A Expired GB265553A (en) 1926-02-06 1926-12-20 Improvements in tetrakisazo dyes, and the process of manufacture

Country Status (1)

Country Link
GB (1) GB265553A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457823A (en) * 1944-12-01 1949-01-04 Ilford Ltd Production of pyrazolone azo dyes
US4081437A (en) * 1974-04-25 1978-03-28 Produits Chimiques Ugine Kuhlmann Water soluble polyazo dyestuffs
US4169831A (en) * 1974-04-25 1979-10-02 Produits Chimiques Ugine Kuhlmann Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazobenzene

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2457823A (en) * 1944-12-01 1949-01-04 Ilford Ltd Production of pyrazolone azo dyes
US4081437A (en) * 1974-04-25 1978-03-28 Produits Chimiques Ugine Kuhlmann Water soluble polyazo dyestuffs
US4169831A (en) * 1974-04-25 1979-10-02 Produits Chimiques Ugine Kuhlmann Water-soluble tetrakisazo dyestuffs derived from 4,4'-diaminoazobenzene

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