With the formal promulgation textile dye treatment technology continues to progress and development, as well as the EU REACH regulations, choose excellent performance and meet environmental requirements of the textile dyes and auxiliaries more and more industry attention, while textile dyes and auxiliaries Selection safe and effective dispersants will become particularly urgent. dispersant species lignin sulfonate is most effective. US MWV lignin sulfonate salt and other dispersants natural pine raw material source for the hydrophobic substance excellent dispersion stability, has been gradually replaced or blending traditional naphthalene sulfonate dispersant in many industries, widely used in textile dyes, pesticides, construction and other industries product processing.
Analysis lignosulfonate anionic surfactant below, contains a lot of natural polymers is carboxy, sulfonic acid group and a methoxy group, an average molecular mass distributions of different products in the range of 5,000 ~ 21,000, usually sodium sulfonate salt, calcium, there are salt, is a polymer electrolyte. wooden tangled dispersants because of their different average molecular weights and degrees of sulfonation, its end use is also very different. For example US MWV’s Wood Su sulfonic acid salt BorresperseAM a 320, compared with other salts to improve the cold water solubility of the acid dyes are more effective, are widely used in metal and weak acid dyes after dye process for the production of high-quality acid printing dyes. The high purity lignin sulfonic acid salt is not yet in production.
US MWV’s U1trazine NA high purity, low staining of lignin sulfonate, post-treatment process is widely used in reactive dyes and acid dyes, can significantly improve the cold water solubility of reactive dyes and acid dyes, reduce produce dye cloth surface color point. and the viscosity of printing paste without any negative impact, is widely used in the production of high-quality active and acid printing dyes in textile auxiliaries industry, Ultrazine NA has also been used as an active disperse dye leveling agent for improving the activity of turquoise blue and so easy dyed flowers reactive dye levelness, especially for cotton and polyester package dyeing when continuous dyeing vat dyes added Uhrazine NA also prevent cloth complexion spot production.
US MWV’s REAX 85A in textile auxiliary industry is a multi-purpose dye dispersant for disperse dyes for polyester and acetate fiber dyeing, dye can effectively prevent condensation produced at high temperature dyeing conditions, improve leveling properties , especially for cheese dyeing machine, Jigger, overflow dyeing machines and other low liquor ratio dyeing conditions. US MWV’s Kraftsperse 1251 for the ultra-high purity lignin dispersant mixed, multi-fiber staining pole low, can effectively reduce the viscosity of the aid system, widely used in pigment and dye based inkjet inks, and to enhance the amount of carbon black dispersion stability and storage of carbon ink is very effective.
Lignin sulfonate dispersant and synthesis due to differences in the level of the pros and cons of raw materials, final product quality also vary. Domestic some lignin sulfonate dispersant use reeds, straw or hardwood as a raw material, due to the purchase of paper unstable plant black liquor internal components, resulting in application performance and end-use restrictions.
NOTE: REAX is a trademark of MeadWestvaco (MWV)