LAS(CAS 25155-30-0) Application in Pigment Post-Treatmen
LAS (Sodium Dodecylbenzenesulphonate, CAS 25155-30-0) is widely known as an effective dispersant for pigment grinding processes.
However, its most undervalued advantage lies in pigment post-treatment — a low-dose, cost-effective solution that significantly improves finished pigment quality, yet is easily ignored by many pigment plants.
Fast Wetting & Complete Deagglomeration for Filter Cake Re-Slurrying
Fresh inorganic pigment filter cakes (iron oxide, bismuth vanadate, chromium oxide) tend to form dense, hard agglomerates after filter pressing. With excellent surface penetration ability, LAS quickly replaces trapped air and residual moisture inside particle gaps. It efficiently breaks up agglomerates and achieves uniform re-dispersion without long-time high-speed stirring, greatly saving post-treatment energy consumption.
Lower Residual Moisture & Higher Drying Efficiency
Thanks to its low CMC and outstanding interfacial activity, LAS optimizes the solid-water interface state of filter cakes. It effectively reduces residual water content, shortens the drying process, and prevents uneven particle coarsening caused by local over-drying during production.
Improved Batch Consistency & Stable Color Performance
Reasonable LAS addition optimizes particle size distribution after post-treatment. It effectively inhibits secondary flocculation during storage, stabilizing tinting strength and color difference across batches. This brings more reliable color consistency for final coating and ink applications.
💡 Practical Formula Tip for Factory Application
LAS delivers the best cost-performance for high-surface-energy inorganic pigment post-treatment. For organic pigments, low-dose compounding with polymeric dispersants can avoid excessive foaming and negative impacts on final gloss and film appearance.
A slight adjustment in post-treatment formula with LAS can greatly upgrade pigment stability, production efficiency and overall cost control.
