monotriklooritriatsiininivärjärit

Monotriklooritriatsiininivärjärit, more commonly known as Monochlorotriazine (MCT) dyes, are a class of reactive dyes widely used in the textile industry for dyeing cellulosic fibers such as cotton, linen, and rayon. These dyes form a covalent bond with the fiber, resulting in excellent wash fastness and durability. The triazine ring, a core structural component, contains a single reactive chlorine atom which is responsible for its reactivity with the hydroxyl groups of cellulose under alkaline conditions.

The dyeing process typically involves alkaline conditions to activate the hydroxyl groups on the cellulose and to promote the nucleophilic attack of the fiber on the dye molecule. Once the covalent bond is formed, the dye becomes an integral part of the fiber structure, resisting removal during washing. MCT dyes offer a broad spectrum of colors and are known for their bright shades and good light fastness. They are generally applied through exhaust dyeing, padding, or printing methods.

Compared to other types of reactive dyes, such as dichlorotriazine (DCT) dyes, MCT dyes are considered to have moderate reactivity. This moderate reactivity makes them less susceptible to hydrolysis (reaction with water), which can reduce dye utilization and lead to waste. However, they may require higher temperatures or longer dyeing times to achieve optimal fixation compared to more reactive dyes. The environmental profile of MCT dyes is a consideration, as with all reactive dyes, due to the potential for unfixed dye to enter wastewater. Modern dyeing techniques aim to maximize dye fixation and minimize effluent impact.