Dyes For Synthetic-polymer Fibres Research Articles

1-Amino-4-hydroxyanthraquinone-β-ethers and thioethers: Red dyes for synthetic-polymer fibres

Condensation of 1-amino-2-bromo-4-hydroxyanthraquinone and of 1-amino-3-bromo-4-hydroxyanthraquinone with alcohols, phenols and thiols yields the corresponding β-ethers and thioethers. These compounds colour polyester in deep rose-red to violet-red hues of excellent build-up and good fastness to light and sublimation. The colour of the dyes is discussed with respect to the nature and orientation of the β-substituents.

1,4‐Dihydroxyanthraquinone‐2‐carboxamides and 2,3‐dicarboximides. Orange dyes for synthetic polymer fibres

AbstractHydrolysis of 1,4‐dihydroxy‐2,3‐dicyanoanthraquinone gives 1,4‐dihydroxyanthraquinone‐2,3‐dicarboxylic anhydride, reaction of which with alkylamines and arylamines gives either the 2‐carboxamide or 2,3‐dicarboximide derivatives. These compounds colour polyester in brownish‐orange hues having good light fastness. The colour of the dyes is discussed in relation to other 2‐substituted derivatives of 1,4‐dihydroxyanthraquinone.

Activated thiocyanates in the synthesis of heterocyclic hansa yellow analogues. Synthesis and colour measurements of 1-(5'-imino-4'-phenyl-4',5'-dihydro-1',3',4'-(hiadiazol-2'-yl)-3(pyrid-2'-yl)amiono-1,2,3-trioxopropane 2-arylhydrazone derivatives as dyes for synthetic-polymer fibres

In a sequence of reactions the activated thiocyanate derivative 2 was used to synthesize new Hansa Yellow dyestuffs embodying two heterocyclic moieties. The structure of the dyes was inferred from spectral and analytical data. Spectral behaviour of the dyes indicated that they existed essentially in the hydrazone form (5-C). Dyeings of the compounds on polyester were assessed with a view to evaluating the percentage reflectance of the dyed fibre at different wave-lengths in the visble region and the Kubelka-Munk equation was used to calculate the K S function of the dyed materials.

1,5‐Dihydroxy‐4,8‐diamino‐ and 1,8‐dihydroxy‐4,5‐diaminoanthraquinone‐β‐ethers and thioethers. Blue dyes for synthetic polymer fibres

AbstractCondensation of mono‐ and di‐bromo‐derivatives of 1,5‐dihydroxy‐4,8‐diaminoanthraquinone and of 1,8‐dihydroxy‐4,5‐diaminoanthraquinone with phenols and thiols afforded the corresponding β‐ethers and thioethers. These compounds coloured polyester in bright reddish‐blue to greenish‐blue hues of generally good fastness to light and sublimation. The colour of the dyes is discussed with respect to the nature and orientation of the β‐substituent.

ChemInform Abstract: Amino Derivatives of 1,8‐Naphthalic Anhydride and Derived Dyes for Synthetic Polymer Fibres.

AbstractDie gelben Dispersionsfarbstoffe (V) sowie (VII) und (VIII) werden auf dem angegebenen Weg aus 4‐Chlomaphthalsäureanhydrid (I) hergestellt und bezüglich ihrer coloristischen Eigenschaften und Echtheiten geprüft und verglichen.

Derivatives of 4‐amino‐2‐nitrodiphenylamine as dyes for synthetic polymer fibres

AbstractThe synthesis of a series of substituted 4‐amino‐2‐nitrodiphenylamines is described. These compounds dye synthetic polymer fibres in bordeaux to violet‐blue shades of moderate to poor light fastness. Light fastness properties are enhanced by the use of substituents which decrease the basicity of the 4‐amino group; such substitution, however, results in colour shifts into the yellow to orange region.

Derivatives of 4‐amino‐2‐nitrodiphenylamine as dyes for synthetic polymer fibres

AbstractThe synthesis of a series of substituted 4‐amino‐2‐nitrodiphenylamines is described. These compounds dye synthetic polymer fibres in bordeaux to violet‐blue shades of moderate to poor light fastness. Light fastness properties are enhanced by the use of substituents which decrease the basicity of the 4‐amino group; such substitution, however, results in colour shifts into the yellow to orange region.