Vinylsulfonivärjärit

Vinylsulfonivärjärit is a Finnish term referring to reactive dyes that contain a vinyl sulfone group. These dyes are widely used in the textile industry for dyeing cellulosic fibers such as cotton, linen, and viscose, as well as for printing on these materials. The vinyl sulfone group is crucial for the dyeing mechanism.

When applied to cellulosic fibers in the presence of an alkaline medium, the vinyl sulfone group undergoes a nucleophilic substitution reaction with the hydroxyl groups of the cellulose. This reaction forms a covalent bond between the dye molecule and the fiber, resulting in excellent wash fastness and durability. The reaction can occur at various temperatures, depending on the specific structure of the vinyl sulfone dye, making them suitable for different dyeing processes, including cold brand and hot brand methods.

Vinylsulfonivärjärit offer a wide range of bright and vibrant colors. Their good substantivity and reactivity contribute to high dyeing efficiency and levelness. They are known for their good light fastness and resistance to various chemical treatments. Due to their strong covalent bond formation, they are also favored for applications where high fastness properties are required, such as sportswear and upholstery. The development and application of vinyl sulfone dyes represent a significant advancement in textile dyeing technology, providing durable and aesthetically pleasing coloration for cellulosic materials.