Sodium Naphthalene Sulfonate

Sodium naphthalene sulfonate formaldehyde (SNF/PNS/FND/NSF), also called naphthalene sulfonate formaldehyde condensate, poly naphthalene sulfonate,sulphonated naphthalene formaldehyde,SNF superplasticizer, is commonly referred to as a superplasticizer for concrete. It is the light brown powder in appearance. And SNF superplasticizer has a strong dispersion effect on cement particles, and the water reduction rate can reach 15-25%. Therefore, sodium naphthalene is especially suitable for the preparation of high-strength concrete, steam-cured concrete, fluid concrete, impermeable concrete, waterproof concrete, plasticized concrete, steel bars and prestressed reinforced concrete.

The naphthalene superplasticizer can be widely used for various concrete projects such as railways, highways, bridges, hydropower, ports, docks, industrial and civil buildings, prefabricated components, and concrete with sodium sulfate content requirements. In addition, sodium naphthalene sulfonate (SNF) superplasticizer can be also used as a dispersant agent in the leather, textile and dye industries, etc.

Type	SNF-A	SNF-B	SNF-C
Solid Content (%) ≥	92	92	92
PH Value	7-9	7-9	7-9
Na2SO4 Content (%)≤	5	10	18
Chlorine Content (%)≤	0.3	0.4	0.5
Net Starch Fluidity(mm)≥	250	240	230
Max Water Reducing Rate(%)	26	25	23
Packing of SNF Superplasticizer	25kg pp bag; 650kg Jumbo bag. Customized package available.

The naphthalene sulfonate formaldehyde condensate is made of naphthalene, sulfuric acid, formaldehyde and liquid base, and undergoes a series of reactions such as sulfonation, hydrolysis, condensation and neutralization, and then dried into SNF powder. Of course, different models of naphthalene sulfonate powder also have different technical specifications.

It should be emphasized that SNF powder has good compatibility with other admixtures. It can be used in combination with admixtures such as retarders, air entraining agents, expansive agents, and active admixtures such as fly ash to formulate concrete admixture composite products with specific properties according to different engineering requirements and construction conditions.

Main Applications of Sodium Naphthalene Sulfonate

(1) Construction Field

• The sodium naphthalene sulfonate formaldehyde condensate is a highly efficient water reducer that can be widely used in concrete. It can significantly reduce the amount of mixing water without affecting the strength of concrete, improve the fluidity and pumpability of concrete, and make concrete easy to construct.
• The naphthalene superplasticizer can improve the workability of concrete, reduce the segregation and bleeding of concrete during mixing, transportation, and pouring, and improve the density and uniformity of concrete.
• SNF superplasticizer helps to improve the strength and durability of concrete. By reducing the pores and cracks in concrete, reducing water penetration and erosion, the service life of concrete structures can be extended.
• Sodium naphthalene superplasticizer can also improve the performance of cement. It can promote the hydration reaction of cement and improve the early and late strength of cement. At the same time, sodium naphthalene sulphonate can also reduce the water consumption of cement standard consistency, improve the fluidity and water retention of cement, and improve the construction performance of concrete.

(2) Industrial Field

In the dye industry, sodium naphthalene formaldehyde can be used as a dispersant to evenly disperse dye particles in water or other solvents, prevent dye particles from agglomerating, and improve the stability and dyeing effect of the dye. It also helps to improve the dye uptake and dyeing uniformity of the dye and reduce the color spots and color flowers during the dyeing process.

(3) Other Fields

• Ceramic industry. In ceramic production, sodium naphthalene sulfonate condensate can be used as a grinding aid and dispersant to improve the grinding efficiency and dispersibility of ceramic raw materials and improve the quality of ceramic products. It helps to reduce the firing temperature of ceramic products and save energy.
• Papermaking industry. The naphthalene sulfonate formaldehyde is used for sizing and strengthening of paper to improve the strength and water resistance of paper. It can improve the surface properties of paper and improve the printing suitability of paper.
• Pesticide adjuvant. As an adjuvant, sodium naphthalene can improve the dispersibility and stability of pesticides, so that pesticides can better exert their efficacy. It helps pesticides to adhere to and penetrate the surface of plants, improve the utilization rate of pesticides, and reduce the use of pesticides and pollution to the environment.

Advantages of Poly Naphthalene Sulfonate Superplasticizer

• High water reduction rate. When the water-cement ratio is constant, the initial slump of concrete can be increased by more than 10cm, and the water reduction rate of poly naphthalene sulfonate can reach up to 15-25%. More importantly, when the strength and slump are basically the same, The poly naphthalene sulfonate can also reduce the amount of cement used by 10-25%.
• Good enhancement. The poly naphthalene sulfonate superplasticizer has obvious early strength and enhancement effect on concrete, and the strength increase range is 20-60%.
• Adaptability. Naphthalene sulfonate is suitable for various specifications and models of cement. And it has good compatibility with other concrete admixtures, for example, it can be combined with an admixture such as a swelling agent, an air entraining agent, and an active admixture such as fly ash.
• Good durability. It can effectively improve the pore structure of the concrete, thereby greatly improving the durability indexes of concrete such as impermeability, carbonation resistance and freeze-thaw resistance.
• Improve the workability of concrete. Comprehensively improve the physical and mechanical properties of concrete.
• Suitable for many concrete projects. Such as fluid concrete, plasticized concrete, steam-cured concrete, impermeable concrete, waterproof concrete, natural curing precast concrete, steel and prestressed reinforced concrete, high-strength and ultra-high-strength concrete.
• Low sodium sulfate content. The sodium naphthalene has a low sodium sulfate content and does not crystallize in the winter when it is made into a liquid, which solves the problem of pipe blockage caused by sodium sulfate crystallization in winter concrete manufacturing and provides convenience for winter concrete construction. After compounding with the retarding component, the slump loss of concrete over time is small.
• Easy to use. It can be used directly or dissolved in water to make a solution admixture, suitable for various construction environments or mixer types.
• Good safety performance. Sodium naphthalene sulfonate is a non-hazardous chemical with many characteristics such as non-toxic, non-irritating and non-radioactive. No corrosion effect on steel reinforcement.

Technical Performance of Sodium Naphthalene

1. SNF powder is suitable for fresh concrete with excessive slump loss over time and poor flowability.
2. Polynaphthalene sulfonate can also make fresh concrete have good workability and can make concrete obtain good slump retention.
3. Good plasticity can significantly extend the transportation time and retention time of commercial concrete and reduce time loss.
4. In the compounding of pumping agents, sodium naphthalene superplasticizer can replace the amount of retarder according to the experimental results.
5. The sodium naphthalene sulfonate is used in various admixture masterbatches such as naphthalene, aliphatic, amino, polycarboxylic acid, etc.
6. Its production process is relatively mature, product performance is stable, and quality is easy to control. After years of development and application, the production technology of naphthalene based superplasticizer has been relatively perfected, and manufacturers can produce products with different specifications and performances according to different needs.
7. The high-efficiency poly naphthalene sulfonate superplasticizer can significantly improve the early strength of concrete, and the strength growth is fast within 1-3 days, which is of great significance for projects that need to be quickly demolded or put into use in advance. In the later stage, the strength of concrete can also maintain a stable growth, and the strength development after 28 days is good, with a strength increase of 20%-60%.
8. The sodium naphthalene sulfonate can effectively increase the fluidity of concrete, reduce bleeding and segregation, make concrete easier to mix, transport and pour, and improve construction efficiency and concrete quality.
9. SNF superplasticizer can improve the pore structure of concrete and reduce porosity, thereby improving the durability performance indicators of concrete such as impermeability, carbonation resistance and freeze-thaw resistance.

Precautions for Using SNF

As an important admixture in modern concrete engineering, the correct use of sodium naphthalene formaldehyde (SNF) is crucial to improving the workability, strength, durability and other properties of concrete. To ensure that SNF superplasticizer can fully exert its effectiveness, the following are several aspects that need to be paid attention to during use:

• Pay attention to the mixing order. When using poly naphthalene sulfonate, the mixing order should be strictly controlled. It is usually recommended to add cement, water and part of the aggregate for premixing, and then slowly add the water reducer after forming a certain slurry, and continue to stir until uniform. Such a mixing order helps the water reducer to be better dispersed in the concrete and improve its effect.
• Mix ratio compliance. When using naphthalene superplasticizer, the concrete mix ratio design requirements must be strictly followed. Any arbitrary adjustment of the raw material ratio or the amount of water reducer may affect the performance of the concrete. Therefore, a detailed mix ratio test should be carried out before construction to determine the best mix ratio and strictly implement it.
• Quality assurance. Select sodium naphthalene sulfonate formaldehyde products with reliable quality and stable performance to ensure the quality of concrete from the source. At the same time, the quality of water reducer products should be regularly tested to ensure that their performance indicators meet the standard requirements.
• Compatibility test. Before use, the compatibility test of SNF superplasticizer with raw materials such as cement and admixtures should be carried out to ensure that they can adapt to each other and will not produce adverse chemical reactions or affect the performance of concrete. Compatibility test is one of the important measures to prevent concrete quality problems.
• Construction monitoring. During the construction process, the performance indicators of concrete such as workability, setting time, and strength should be monitored and tested in real time. Once an abnormal situation is found, the cause should be found immediately and corresponding measures should be taken to adjust it to ensure that the quality of concrete is stable and reliable.
• Strengthening maintenance. After using sodium polynaphthalene sulfonate superplasticizer, the early strength of concrete develops rapidly, but the growth of later strength still requires sufficient maintenance to ensure. Therefore, during the construction process, the maintenance of concrete should be strengthened, such as maintaining appropriate humidity and temperature conditions, avoiding early load effects, etc., to ensure that concrete can fully exert its performance potential.

Kingsun – Leading SNF Superplasticizer Manufacturer

As a leading manufacturer & exporter of SNF Superplasticizer in China, Kingsun has been focusing on the research and production of sulphonated naphthalene formaldehyde for many years. And we have our own factory and multiple advanced production lines, so we always do our best to provide our customers with the best products, prices and services. Therefore, all of our products are well received by domestic and foreign customers. So far , Kingsun sodium naphthalene sulfonate superplasticizers have been exported to more than 30 countries, they are Israel, Iran, Pakistan, Thailand, Singapore, Malaysia,Uzbekistan, Indonesia, Russia, Vietnam, South Africa, Saudi Arabia, UAE, etc.

• More than 15+ years’ experience in construction industry. Kingsun can makes the business become professional & simple & easy.
• Kingsun factory has a large warehouse, the advanced production equipment, R&D center and quality inspection center.
• Product certifications. ISO/BV/SGS can ensure the qualified products and traceability.
• One-to-one Service. Our sales manager can customize the order for your specific market and help you save cost.
• Timely response. All the feedback from customers will be treated seriously and promptly.
• Top quality products and competitive factory prices.