Performance characteristics:
Fluorescent Brightener VBL is a typical representative product of bis(triazinylamino) fluorescent brighteners, soluble in 80 times soft water, exhibiting anionic properties, with acid and alkali resistance of pH=6~11, and the dye bath pH is best at 8~9. In acidic solutions, fluorescence gradually weakens and yellows as acidity increases. It can withstand hard water up to 300ppm, free chlorine up to 0.25%, but is not resistant to metal ions such as copper and iron. It is stable to sodium hydrosulfite but not resistant to high-temperature baking. It can be used in the same bath with anionic surfactants or dyes, and nonionic surfactants. The fluorescent tone is bluish violet (blue-violet light). Fluorescent Brightener VBL should not be used in the same bath with cationic dyes and surfactants, or synthetic resin precondensates.
Scope of application:
1, Used for whitening white products of cotton and viscose, as well as brightening light-colored or printed products. Light fastness is average, with good affinity for cellulose fibers and average leveling properties. Suitable for dyeing, padding, and printing pastes.
2, Can be used for whitening vinylon and nylon products. It can also be used in the paper industry for whitening paper pulp or coatings.