SNF Polynaphthalene Sulfonate FDN Dispersant Powder Water Reducing Concrete Admixture

SNF Polynaphthalene Sulfonate FDN Dispersant Powder Water Reducing Concrete Admixture

Polynaphthalene Sulfonate SNF-B Water Reducer Product Description:

JF SODIUM NAPHTHALENE SULFONATE POWDER (SNF-B)

(Synonyms: Sodium salt of Sulfonated Naphthalene formaldehyde poly condensate in powder form)

Industrial naphthalene is a kind of basic chemical raw material. Its appearance is white flaky crystals, sometimes slightly red or yellow, with a strong tar smell. It is easily soluble in ether, methanol, absolute ethanol, chloroform and other solvents. It is mainly used in the production of water-reducing agents. , Dispersant, phthalic anhydride, naphthalene, naphthylamine, etc. It is a raw material for the production of synthetic resins, plasticizers, rubber antioxidants, surfactants, synthetic fibers, dyes, paints, pesticides, medicines and fragrances.

Polynaphthalene Sulfonate Usage:

Polynaphthalene Sulfonate is a thinner, used in the papermaking industry to control the pulp, reduce the two-sidedness, improve the retention of fillers or fine fibers, improve sizing, and reduce coating viscosity. Used as a high-efficiency dispersant for water-based paints and pigment pastes. Used as a colorant dispersant in acrylic series, aldehyde-acrylic series, and chlorinated latex paints. It can also be used as an adhesive, polymer filler powder and sealing layer to improve water resistance.

Polynaphthalene Sulfonate Manufacturing Method:

The preparation process includes three steps: methyl naphthalene sulfonation, condensation of sulfonated product with formaldehyde, and neutralization. Put 500kg of methyl naphthalene into the sulfonation kettle, heat to melt, start stirring, and raise the temperature to 130～140℃ for reaction 2. Then add 210L of water under rapid stirring, and then stir for half an hour and then take a sample to measure the acidity. If the total acidity is 25%-27%, it is qualified. Cool to 90-100°C. Add 300kg of 37% formaldehyde solution at once. Increase the pressure naturally, control the reaction temperature at 130～140℃, and the pressure at 0.15～0.20MPa. React for 2h to allow it to fully condense. After the condensation is completed, 30% lye is added for neutralization, and the pH is about 7. Finally, the crystals are cooled, filtered, and dried to obtain the finished product.

Polynaphthalene Sulfonate Function:

It has good diffusion performance, no permeability and foaming performance. Acid, alkali, hard water and inorganic salts. It has no affinity for cotton, hemp and other fibers. Can be used with protein and nylon, but not with cationic dyes or cationic surfactants. The pH(1) of the solution approaches neutral. This product is mainly used as dispersant and filler for VAT dyes and disperse dyes. It has the advantages of good grinding effect, good dispersity, good heat resistance, good dispersity stability at high temperature and so on. Compared with dispersant N, it has high temperature resistance and good stability. This product can make the dye brighter, higher color power, uniform color. It can also be compounded with various dispersants to meet the commercial needs of various disperse dyes and VAT dyes. It can also be used as an early strength water reducing agent for concrete. It can be used as VAT dye grinding dispersant and VAT dye suspension dispersant.