Dispersant NNO: A Chemical Booster for Excellent Dispersion

Dispersant NNO is a naphthalene-based dispersant with extremely wide applications in the industrial field. Its chemical name is sodium methylene bis-naphthalene sulfonate, belonging to the category of naphthalene-based aromatic sulfonate-formaldehyde condensates, and its accurate molecular formula is C₂₁H₁₄Na₂O₆S₂. In terms of appearance, this product is mostly in the form of off-white or slightly yellow powder, with excellent water solubility. The aqueous solution formed after dissolution is neutral, a characteristic that allows it to be conveniently applied in various water-based systems without the need for additional pH adjustment to adapt to the system environment.

From the perspective of molecular structure, the core advantage of Dispersant NNO stems from its unique amphiphilic structure — one end of the molecule is a hydrophobic group composed of naphthalene rings, and the other end is a hydrophilic group formed by sodium sulfonate. This structure enables it to play a key role in solid-liquid dispersion systems: the hydrophilic groups are tightly adsorbed on the surface of solid particles through electrostatic adsorption, forming a negatively charged electric double layer around the particles, which prevents the particles from approaching each other by virtue of the repulsive force of the electric double layer; at the same time, the hydrophobic groups face the dispersion medium (such as water, solvents, etc.), further isolating the particles through the steric hindrance effect. Under the dual effects, the agglomeration and sedimentation of particles are effectively prevented, and finally a long-term uniform dispersion state of the system is achieved, laying a stable foundation for subsequent processing links.

In industrial application scenarios, the applicable scope of Dispersant NNO far exceeds traditional cognition, and it has shown excellent results in various fields. In the dye industry, in addition to conventionally improving the solubility and dyeing levelness of vat dyes and disperse dyes, for the compound system of reactive dyes and acid dyes, adding 0.5%-2% of Dispersant NNO can significantly reduce the dye coagulation rate, improve the color fastness of dyed fabrics by 1-2 grades, and it is especially suitable for the dyeing of various fibers such as pure cotton and polyester. In the coatings and inks field, it can not only prevent the agglomeration of pigment particles, but also for water-based coatings with high pigment-volume concentration (such as exterior wall latex paint and industrial anti-corrosion coatings), adding 0.3%-1.5% of this product can extend the storage stability of the coating to more than 6 months, and at the same time improve the glossiness and scrub resistance of the coating after drying; in ink production, for difficult-to-disperse pigments such as carbon black and titanium dioxide, it can optimize the dispersion fineness of pigments and reduce the screen blocking phenomenon during printing.

In the papermaking industry, besides being used as a pulp dispersant to improve paper formation, in the production of thin paper such as tissue paper and cultural paper, adding 0.2%-1% of the product can improve the dispersibility of pulp fibers, reduce defects such as holes and wrinkles in paper, and at the same time enhance the tensile strength and tearing strength of paper. In the ceramic industry, adding 0.8%-3% of Dispersant NNO during the preparation of ceramic slurry can reduce the slurry viscosity, improve slurry fluidity, make the ceramic green body form more uniformly, and reduce the risk of deformation and cracking during firing, which is especially suitable for daily-use ceramics and architectural ceramic products fired at high temperatures.

In addition, its application scenarios have also extended to building materials, textile, mineral processing and other fields: in the building materials industry, it is used in concrete admixtures to improve the dispersibility of sand and gravel aggregates, reduce concrete bleeding, and enhance concrete strength; in the textile industry, as a dispersant for printing paste, it can ensure the uniform distribution of color paste and avoid color difference in printed patterns; in the mineral processing field, adding 1%-2.5% of the product can promote the separation of mineral particles from gangue and improve the recovery rate of useful minerals.

This product also has outstanding environmental adaptability, with significant acid resistance, alkali resistance and high temperature resistance. It can stably function in an environment with a pH value of 2-12 and a temperature not exceeding 120℃. Its dosage can be flexibly adjusted according to material characteristics and application scenarios, with a conventional range of 0.2%-3%. Compared with similar dispersants, it can achieve better dispersion effect at the same dosage and has high cost performance, making it one of the dispersant varieties with high application maturity and strong reliability in the current industrial sector. During use, the appropriate dosage should be determined through small-scale tests according to the specific system to avoid abnormal system viscosity or increased costs caused by excessive dosage, so as to maximize economic benefits while achieving effective dispersion.