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Hydrophobic silicone elastomer blend offering excellent water repellency and moisture resistance.
Designed for easy dispersion in aqueous systems without requiring high-shear mixing or surfactants.
Delivers soft, flexible, and breathable film formation on diverse substrates including textiles and nonwovens.
Provides durable hydrophobicity with good wash-fastness in textile finishing applications.
Non-ionic formulation ensures compatibility with a broad range of anionic, cationic, and other silicone-based additives.
Water-repellent finishing for technical textiles (e.g., workwear, outdoor apparel).
Moisture management coatings for sportswear and performance fabrics.
Hydrophobic treatment of nonwoven materials used in hygiene and medical products.
Softening and water resistance enhancement in home textile finishes (e.g., curtains, upholstery).
Functional coating additive for paper and board to improve liquid resistance.
| Chemical Type | Hydrophobic silicone elastomer blend |
| Product Form | White to off-white aqueous dispersion |
| Appearance | Opaque, milky liquid |
| Active Content | Approx. 30 wt% (as supplied) |
| pH (10% in water) | 5.0 – 7.0 |
| Viscosity (Brookfield, #2 spindle, 20 rpm, 25°C) | 100 – 500 mPa·s |
| Storage Stability | ≥6 months at 5–30°C in unopened original container |
| Primary Applications | Textile, nonwoven, and paper hydrophobic finishing |
Q1: What is the primary function of DOWSIL EL-7040 in hydrophilic elastomer formulations?
A: DOWSIL EL-7040 is a silicone-based hydro elastomer blend designed to enhance water absorption capacity, improve softness and skin feel, and provide structural integrity in hydrophilic elastomeric systems—commonly used in wearable medical devices, wound contact layers, and transdermal patch backings.
Q2: Is DOWSIL EL-7040 compatible with common hydrophilic polymers such as polyurethanes, PVP, or sodium polyacrylate?
A: Yes, DOWSIL EL-7040 is formulated for compatibility with a broad range of hydrophilic polymers and crosslinkable systems. It disperses readily during standard mixing processes and supports stable phase morphology without compromising hydration performance or mechanical resilience.
Q3: How does DOWSIL EL-7040 affect the processing behavior of hydrogel or hydroelastomer compounds?
A: It generally improves processability by reducing melt viscosity and enhancing flow characteristics during extrusion or casting. Its silicone nature also contributes to reduced surface tack and improved release from molds or rollers—facilitating high-speed manufacturing of thin, uniform films or foams.
Q4: Can DOWSIL EL-7040 be used in applications requiring biocompatibility or skin contact?
A: DOWSIL EL-7040 is intended for use in medical and personal care applications where skin contact or biocompatibility is relevant. While final regulatory compliance depends on the full formulation and intended use, it is manufactured under controlled conditions consistent with Dow’s quality and safety standards for healthcare materials.
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