Dispersant MF

Dispersant MF(melamine-formaldehyde resin)

Dispersant MF(melamine-formaldehyde resin) is an anionic surfactant, dark brown powder, soluble in water, soluble in water, acid, alkali and hard water, it mainly works as dispersant and additive in disperse dyestuff, vat dyestuff and reactive dyestuf,easy to absorb moisture, nonflammable, with excellent dispersant and thermal stability, no permeability and foaming, resisting acid and alkali, hard water and inorganic salts, no affinity for fibers such as cotton and linen; have affinity for proteins and polyamide fibers; can be used in conjunction with anionic and nonionic surfactants, but not in combination with cationic dyes or surfactants.

Synonyms: Sodium poly(naphthaleneformaldehyde) sulfonate; Naphthalenesulfonic acid, polymer with formaldehyde, sodium salt; Diffusing agent MF; disodium 5,5′-methanediyldinaphthalene-2-sulfonate; 2-naphthalenesulfonic acid, 5,5′-methylenebis-, disodium salt

Appearance: Dark brown powder

Compose: Methylnaphthalene sulfonate formaldehyde condensate

 Ion type: Negative ion

CAS No.: 9084-06-4


Molecular Formula: (C10H8O3SCH2O)nNan

Main Specifications

Thermal stability (disperse blue 79) 130℃, grade4–54–5
Sodium sulfate content5%max8%max
pH (1%solution)7-97-9
Insolubles in water0.05%max0.05%max
calcium and magnesium ion4000ppm Max4000ppm Max


Mainly used for vat dyes, disperse dyes, reactive dyes as dispersing agent.

 It can also be used in wettable pesticide.

have a good grinding effect, high pigmentation power, high dispersion force and excellent thermal stability and so on.

 can also be used for textile printing and dyeing, pesticides, architecture, ceramics, rubber, paper, oil drilling, carbon black, water treatment and other industries as dispersing agent.

It can also be used as a stabilizer for rubber industrial latex, and as an auxiliary for the leather industry.

Dispersing agent MF is soluble in concrete as a high range water reducing agent, which can shorten the construction period, save cement, save water and increase cement strength.

Application Method

  With good diffusivity and performance of colloid protection, with no surfactant ofpermeability andfoamability; having affinity with protein and polyamide fibre, but with no affinity with fibres such as cotton and linen.

 (1)It is used as dispersant and filling agent for disperse dye and vat dye. When carrying out fineness processing of disperse dye or vat dye, we can add dispersant and dye together into the grinding machine. The dosage of dispersant N is 0.5-3 times of vat dye or 1.5-2 times of disperse dye, or we can also add some filling agent during dye commercialization

  (2)Vat dye pigment pad dyeing: For pad dye bath, normally 3-5g/L dispersant N shall be added, and generally 15~20g/L of dispersant N for original bath

  (3)During disperse dye dyeing and terylene high-temperature and high-pressure dyeing process, normally 0.5~1.5g/L shall be added for the dye bath.

  (4)As to azoic dye dyeing, it is used to improve level dyeing and friction fastness; generally, dosage of dispersant for naphthol bottoming bath is 2~5g/L, and dispersant N for developing bath is normally 0.5~2g/L.