Introduction
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DYSWU is a biomass-based polyester–amine emulsifier designed for environmentally friendly oil-based drilling fluids. It provides strong and stable emulsification at temperatures up to 180°C / 356°F, forming a three-dimensional network structure in the fluid.
DYSWU can be used as a primary emulsifier, as a secondary emulsifier, or as a combined primary/secondary package, giving formulators flexibility in OBM system design.

Product Options (Supply Mode)

• All-in-one (Primary + Secondary) — convenient for simplified mixing and inventory management

• Separated supply — Primary Emulsifier and Secondary Emulsifier provided individually to match customer recipes and optimization strategy

Applications / Functions
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• Emulsification of oil-based and synthetic-based drilling fluids in environmentally focused systems

• Acts as primary emulsifier, building base emulsion and oil-wetting of solids

• Acts as secondary emulsifier, improving electrical stability and long-term emulsion integrity

• Helps maintain a fine, stable water-in-oil emulsion over a broad oil/water ratio window
• Supports high-density OBM formulations where emulsion stability is critical

Advantages
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• High-temperature resistance up to 180°C / 356°F

• Biomass-derived chemistry, suitable for low-toxicity / eco-friendly OBM designs

• Flexible two-in-one concept – can be supplied and applied as a single combined emulsifier or split into primary and secondary emulsifiers

• Balanced HLB value (≈ 5.2–6.6) for robust water-in-oil emulsions

• Delivers high demulsification voltage (ES ≥ 600 V) at typical oil/water ratios (about 95.5:4.5 to 70:30)

Recommended Treatment
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Typical dosage （Exact dosage should be optimized in the lab according to base-oil type, density, oil/water ratio and required ES / emulsion stability）:

• 2.0–8.0 % based on base-oil phase of the drilling fluid

Package
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• 200 kg plastic drum

• Custom packaging available upon request