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This is a list of dyes with Colour Index International generic names and numbers and CAS Registry numbers. ... Reactive blue 4 61205 anthraquinone 13324-20-4:
In a reactive dye, a chromophore (an atom or group whose presence is responsible for the colour of a compound) contains a substituent that reacts with the substrate. Reactive dyes have good fastness properties owing to the covalent bonding that occurs during dyeing. Reactive dyeing is the most important method for coloring cellulose fibers.
reactive dye Reactive dyes are a class of synthetic dyes that first appeared commercially in 1956, after their invention in 1954 by Rattee and Stephens at the Imperial Chemical Industries Dyestuffs Division site in the United Kingdom. Reactive dyes are used primarily to dye natural fibers and cellulose fibers such as rayon. [39] resist dyeing
Acid dyes are not substantive to cellulosic fibers. Most synthetic food colors fall in this category. Examples of acid dye are Alizarine Pure Blue B, Acid red 88, etc. Basic dyes are water-soluble cationic dyes that are mainly applied to acrylic fibers, but find some use for wool and silk.
If the vinyl sulfone group is introduced via a primary or secondary aliphatic amine, this is performed again by condensation with a halotriazine compound. An example is 2-[2-(2-chlorethylsulfonyl)ethoxy]ethanamine used in bifunctional reactive dyes in combination with a monofluoro or monochlorotriazine hook. [3]
The chromophore (the chemical group of a dye responsible for colour) of reactive dyes contain substituents that react with the substrate to which it is applied. Reactive dyes have better fastness properties owing to this covalent bonding, and are the most important method for coloring cellulose fibers but can also be used on wool and nylon.
Vat dyes are a class of dyes that are classified as such because of the method by which they are applied. Vat dyeing is a process that refers to dyeing that takes place in a bucket or vat. The original vat dye is indigo , once obtained only from plants but now often produced synthetically.
With amines, one or more chloride is displaced. The remaining chlorides are reactive, and this theme is the basis of the large field of reactive dyes. Cyanuric chloride assists in the amidation of carboxylic acids. [3] The 1,2,4-triazines can react with electron-rich dienophiles in an inverse electron demand Diels-Alder reaction. This forms a ...