GB575437A - Manufacture of new disazo dyestuffs containing copper - Google Patents
Manufacture of new disazo dyestuffs containing copperInfo
- Publication number
- GB575437A GB575437A GB1508044A GB1508044A GB575437A GB 575437 A GB575437 A GB 575437A GB 1508044 A GB1508044 A GB 1508044A GB 1508044 A GB1508044 A GB 1508044A GB 575437 A GB575437 A GB 575437A
- Authority
- GB
- United Kingdom
- Prior art keywords
- disulphonic acid
- aminonaphthol
- dimethoxybenzidine
- naphthol
- positions
- 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
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
- C09B35/20—Disazo dyes characterised by the tetrazo component the tetrazo component being a derivative of biphenyl from two coupling compounds of different types
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
Abstract
Copper complexes of unsymmetrical disazo dyes are made by tetrazotising 1 mol. of benzidine carrying methoxy or ethoxy groups in the 3- and 31-positions and optionally a methyl or ethyl group in each of the phenyl nuclei, coupling with 1 mol. of a 1.8- or 2.8-aminonaphthol which carries, in a pair of the positions 3, 4, 5, 6 and (unless occupied by an amino group) 2, not being ortho or peri to each other, two sulphonic acid groups, and with 1 mol. of a 1- or 2-naphthol disulphonic acid, wherein the sulphonic acid groups may occupy any non-adjacent pair of the positions 3, 6, 7 and 8, provided that at least one of the positions 2 and 3 is occupied, and subsequently heating in an aqueous solution of a water-soluble copper salt. In the examples: 1-naphthol-3 : 8- or 3 : 6-disulphonic acid \sM 3 : 31-dimethoxybenzidine --> 1 : 8-aminonaphthol-2 : 4-disulphonic acid is heated with copper sulphate or acetate in an aqueous solution containing ammonium hydroxide or an organic base, e.g. pyridine, piperidine or morpholine. In a table, the copper compounds of the following dyes are specified: 2-naphthol-3 : 6- or 6 : 8-disulphonic acid \sM 3 : 31-dimethoxybenzidine --> 1 : 8-aminonaphthol-2 : 4-disulphonic acid, 1-naphthol-3 : 8-disulphonic acid \sM 3 : 31-dimethoxybenzidine --> 1 : 8-aminonaphthol-3 : 6-, 3 : 5- or 4 : 6-disulphonic acid.or 2 : 8-aminonaphthol - 3 : 6 - disulphonic acid. 2 : 21 - Di-methyl-5 : 51-dimethoxybenzidine is also specified as tetrazo component. The products dye silk and cellulosic fibres, e.g. cotton and regenerated cellulose, blue shades, the after-treatment of which dyeings with crease-proofing resinous condensation products such as a urea-formaldehyde condensation product is described. Specification 366,580 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1508044A GB575437A (en) | 1944-08-08 | 1944-08-08 | Manufacture of new disazo dyestuffs containing copper |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1508044A GB575437A (en) | 1944-08-08 | 1944-08-08 | Manufacture of new disazo dyestuffs containing copper |
Publications (1)
Publication Number | Publication Date |
---|---|
GB575437A true GB575437A (en) | 1946-02-18 |
Family
ID=10052656
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1508044A Expired GB575437A (en) | 1944-08-08 | 1944-08-08 | Manufacture of new disazo dyestuffs containing copper |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB575437A (en) |
-
1944
- 1944-08-08 GB GB1508044A patent/GB575437A/en not_active Expired
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