GB361489A - Manufacture of azo-dyestuffs - Google Patents

Manufacture of azo-dyestuffs

Info

Publication number
GB361489A
GB361489A GB2845230A GB2845230A GB361489A GB 361489 A GB361489 A GB 361489A GB 2845230 A GB2845230 A GB 2845230A GB 2845230 A GB2845230 A GB 2845230A GB 361489 A GB361489 A GB 361489A
Authority
GB
United Kingdom
Prior art keywords
azo
dyeings
navy blue
diaminoazo
compound
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
GB2845230A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2845230A priority Critical patent/GB361489A/en
Publication of GB361489A publication Critical patent/GB361489A/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
    • C09B35/36—Trisazo dyes of the type
    • C09B35/362—D is benzene

Abstract

Azo dyes; lakes; azo dyes, forming on the material; cellulose esters, dyeing.--Azo dyestuffs giving navy blue to black dyeings on acetate silk and cellulose esters in general are produced in substance, on a substratum or on the fibre by coupling with 2 : 3-oxynaphthoic acid (2 mols.) a tetrazo compound of a diaminoazo compound of the general formula-- <FORM:0361489/IV/1> in which R is an aromatic residue, substituted or not, with the NH2 group in pposition to the azo group. The diaminoazo compounds are obtainable by coupling a diazotized aromatic p-nitramine or p-monoacetyldiamine with a -amino-ar-tetrahydronaphthalene and reducing or hydrolysing the product. The following examples are specified: (1) Acetate silk is treated for \ba3/4\be hr. at 70-75 DEG C. in a bath containing the hydrochloride of 4-aminobenzene - azo-4<1>-amino - ar - tetrahydronaphthalene, hydrochloric acid and sodium acetate, subjected to tetrazotization of the diamine at 10-15 DEG C., and developed at 60-70 DEG C. with 2 : 3-oxynaphthoic acid to obtain a vivid navy blue readily dischargeable dyeing. (2) The 2-chloro derivative of the diaminoazo compound in (1) similarly gives more reddish dyeings. (3) The 2-methoxy derivative similarly gives greenish navy blue dyeings. (4) The 2-methyl derivative similarly gives navy blue dyeings. Specification 330,591, [Class 2 (iii), Dyes &c.], is referred to.
GB2845230A 1930-09-23 1930-09-23 Manufacture of azo-dyestuffs Expired GB361489A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2845230A GB361489A (en) 1930-09-23 1930-09-23 Manufacture of azo-dyestuffs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2845230A GB361489A (en) 1930-09-23 1930-09-23 Manufacture of azo-dyestuffs

Publications (1)

Publication Number Publication Date
GB361489A true GB361489A (en) 1931-11-26

Family

ID=10275840

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2845230A Expired GB361489A (en) 1930-09-23 1930-09-23 Manufacture of azo-dyestuffs

Country Status (1)

Country Link
GB (1) GB361489A (en)

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