20 research outputs found
Disperse Dyes: Part XXI-Synthesis of Bisazo Dyes from Diaminobenzobisthiazole and Their Dyeing Properties
18-19<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Nine bisazo dyes have been
synthesized in high yields by coupling tetrazotised 2,7-diaminobenzo [1,2d : <span style="font-size:
11.0pt;line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:="" minor-latin;mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:="" minor-fareast;mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">4,3d']
bisthiazole with various commercial coupling components. Investigation of the
dyeing properties revealed that most of the dyes had low pick up and fastness.
One dye derived from N-ethyl-N-β-cyanoethylaniline, however, gave
bordeaux shade and had excellent pick up and fastness on polyester.</span
Synthesis of Silicon Coordinated Azo Dyes
20-21<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Silicon coordinated dyes
have been prepared by reacting silicon tetrachloride with dyes derived from
pyrazolone and acetoacetanilide in toluene in the presence of triethylamine.
The silicon coordinated azo dyes are stable to water, hydrochloric acid (10%)
and sodium hydroxide (10%) even on boiling. However, in dioxane, the complexes
decompose when boiled with acid and alkali to give the parent dyes.</span
Disperse Dyes: Part XX-Synthesis of 4-Arylazo-1-naphthylaminoacrylates
16-17<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";color:black;mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Several
4-arylazo-1-naphthylaminoacrylates have been synthesized by reacting
4-arylazo-1-naphthylamines with conjugated enol ethers like ethyl
ethoxymethylenemalonate and ethyl ethoxymethylenecyanoacetate. The dyeing properties of
these dyes together with those of the acyl and benzoyl derivatives of amino azo
dyes have been studied. Incorporation of the acrylate chains in the dye
structure has been found to improve the pickup of the dyes considerably. The light and sublimation
fastness of the acrylate dyes varies from very good to excellent.</span
Disperse Dyes: Part XIX-Synthesis of Disperse Azo Dyes from 2-Amino-8Hpyrazolo (4,5-g) benzothiazole and Their Dyeing Properties
13-15<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">2-Amino-8H-pyrazolo (4,5
-g) benzothiazole has been synthesized in high yield (90%) by the action of
ammonium thiocyanate and bromine in glacial acetic acid on 6-aminoindazole. An
angular structure, based on NMR and mass spectral data, has been assigned to
the resulting heterocyclic amine. The amine was diazotized in phosphoric acid
(87%) and coupled with various coupling components in acetic acid-ethanol
cosolvent. The dyeing properties of the dyes obtained have been studied.</span
Synthesis of Acid Dyes for Nylon
22-23<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";mso-ansi-language:en-us;="" mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">Acid dyes for nylon have
been prepared from m-aminoanilinoacrylates and gamma-acid under acidic
conditions. The dyeing properties of the resulting dyes have been studied.</span
Disperse Dyes: Part XVIII-Synthesis of Disperse Azo Dyes from 2-Amino-6-phenylazobenzothiazole and Their Dyeing Properties
10-12<span style="font-size:11.0pt;line-height:115%;
font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;mso-fareast-font-family:="" "times="" new="" roman";mso-fareast-theme-font:minor-fareast;mso-hansi-theme-font:="" minor-latin;mso-bidi-font-family:"times="" roman";color:black;mso-ansi-language:="" en-us;mso-fareast-language:en-us;mso-bidi-language:ar-sa"="">2-Amino-6-phenylazobenzothiazole
has been prepared in high yield (93<span style="font-size:11.0pt;
line-height:115%;font-family:" calibri","sans-serif";mso-ascii-theme-font:minor-latin;="" mso-fareast-font-family:"times="" new="" roman";mso-fareast-theme-font:minor-fareast;="" mso-hansi-theme-font:minor-latin;mso-bidi-font-family:"times="" roman";="" color:#131313;mso-ansi-language:en-us;mso-fareast-language:en-us;mso-bidi-language:="" ar-sa"="">%) by the interaction of
ammonium thiocyanate and bromine in glacial acetic acid. The resulting
heterocyclic amine was diazotized in phosphoric-nitric acid 'mixture and was coupled
with various coupling components to get azo dyes. Some of the dyes in the
series showed good pick up and fastness on polyester fibre.</span