GB349960A - Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades - Google Patents

Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades

Info

Publication number
GB349960A
GB349960A GB359230A GB359230A GB349960A GB 349960 A GB349960 A GB 349960A GB 359230 A GB359230 A GB 359230A GB 359230 A GB359230 A GB 359230A GB 349960 A GB349960 A GB 349960A
Authority
GB
United Kingdom
Prior art keywords
acid
dyeing
regenerated cellulose
application
dinitrobenzidine
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
GB359230A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB359230A priority Critical patent/GB349960A/en
Publication of GB349960A publication Critical patent/GB349960A/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
    • C09B35/08—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl

Landscapes

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

Abstract

Regenerated celluloses; dyeing.-Regenerated cellulose is dyed in even red to brown shades with the disazo dyes made by tetrazotizing 2-nitro-benzidine or 2 : 21-dinitrobenzidine and coupling in alkaline medium with 1 : 5 : 7-aminonaphthol sulphonic acid or an N-substituted derivative thereof (2 mols.) or with 1 : 5 : 7-acid or an N-substituted derivative thereof (1 mol.) in alkaline medium and a phenol, naphthol, or a pyrazolone, or sulphonic or carboxylic derivative thereof (1 mol.) in alkaline or neutral medium. In an example, viscose silk is dyed violet-brown with the dyestuff 2-nitrobenzidine \sQ salicylic acid and 1 : 5 : 7-acid; using 2 : 21-dinitrobenzidine yellowish brown shades are obtained. Other coupling components specified are o-cresotinic acid, N-benzoyl-1 : 5 : 7-acid and 1-41-sulphophenyl-3-methyl-5 -pyrazolone. Specifications 2370/93, [Class 2, Acids and salts, Organic &c.], 13236/13, and 294,922, [both in Class 2 (iii), Dyes &c.] are referred to.
GB359230A 1930-02-03 1930-02-03 Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades Expired GB349960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB359230A GB349960A (en) 1930-02-03 1930-02-03 Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB359230A GB349960A (en) 1930-02-03 1930-02-03 Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades

Publications (1)

Publication Number Publication Date
GB349960A true GB349960A (en) 1931-06-04

Family

ID=9761238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB359230A Expired GB349960A (en) 1930-02-03 1930-02-03 Application of disazo dyestuffs to the dyeing of regenerated cellulose in even shades

Country Status (1)

Country Link
GB (1) GB349960A (en)

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