Naphthalene Superplasticizers
Naphthalene Superplasticizer (High-Solid Powder)
High-solid powder · Built for shipping and dry mixes
Naphthalene Superplasticizers
Naphthalene Superplasticizer (Liquid)Cost effective
Aqueous naphthalene sulfonate formaldehyde condensate with 18–25% water reduction. Broad compatibility and stable pricing make it the value choice for general-purpose concrete.
Overview
Naphthalene sulfonate formaldehyde condensate — internationally known as BNS or SNF, and as FDN in China — is the longest-established high-range water reducer. It disperses cement particles through electrostatic repulsion.
Key benefits
- Mature raw material supply and process: stable pricing, unaffected by macromonomer market swings
- Good compatibility across cement types, low dosage sensitivity
- Low air entrainment and good surface finish
- Compatible with most retarding and air-entraining components
Application notes
Dosage is higher than for PCE, so accurate metering matters. Products with high sodium sulfate may crystallise at low temperature — choose the low-alkali grade or provide insulation. Do not blend directly with polycarboxylate products.
Typical uses
General-purpose concrete C25–C45, precast elements, pavement concrete, hydraulic concrete.
Technical specification
| Appearance | Brown liquid |
| Solid content | 40% / 45% ± 1% |
| Water reduction | 18% – 25% |
| pH value | 7.0 – 9.0 |
| Density (25°C) | 1.18 – 1.24 g/cm³ |
| Sodium sulfate content | ≤ 5% (standard) / ≤ 2% (low-alkali) |
| Chloride content | ≤ 0.05% |
| Cement paste fluidity | ≥ 220 mm |
Standards
Applications
- General-purpose concrete
- Precast elements
- Pavement concrete
- Hydraulic concrete
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