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High-purity, free-flowing silicone powder with consistent particle size distribution.
Excellent thermal stability for processing at elevated temperatures without degradation.
Low surface energy providing superior lubricity and anti-blocking performance in polymer blends.
Non-reactive and chemically inert—compatible with a broad range of thermoplastics and elastomers.
Easy dispersion in dry-blending operations; no need for solvents or pre-treatment.
Internal lubricant for polyolefin compounds (e.g., PP, PE) in injection molding and extrusion.
Anti-blocking agent in masterbatch formulations for films and flexible packaging.
Surface modifier for engineering plastics to improve scratch resistance and tactile feel.
Processing aid in thermoplastic elastomer (TPE) and TPV compounds.
Release enhancer in rubber compounding and molded silicone parts manufacturing.
| Chemical Type | Dimethyl silicone polymer (polydimethylsiloxane) |
| Product Form | Free-flowing dry powder |
| Appearance | White to off-white fine powder |
| Primary Applications | Lubricant, anti-blocking agent, surface modifier |
| Key Features | Thermally stable, non-migrating, solvent-free |
| Benefits | Improved melt flow, reduced friction, enhanced surface finish |
| Storage Conditions | Store in original sealed container at 15–25°C, away from moisture |
| Shelf Life | 24 months from date of manufacture when stored properly |
Q1: What is the primary function of DOWSIL EP-2720 Silicone Powder in polymer formulations?
A: DOWSIL EP-2720 is a surface-modified silicone powder designed to improve slip, abrasion resistance, and surface smoothness in thermoplastics and thermosets. It functions as a processing aid and performance enhancer, particularly in injection-molded or extruded parts where tactile feel and wear durability are critical.
Q2: Is DOWSIL EP-2720 compatible with common engineering resins such as polyamide (PA), polypropylene (PP), and polycarbonate (PC)?
A: Yes — DOWSIL EP-2720 exhibits broad compatibility with semi-crystalline and amorphous thermoplastics, including PA6, PA66, PP, PC, and ABS. Its surface treatment helps promote dispersion and interfacial adhesion during melt compounding, minimizing bloom or plate-out under typical processing conditions.
Q3: How should DOWSIL EP-2720 be incorporated into a polymer system?
A: It is typically added via dry blending prior to extrusion or injection molding, or introduced directly into the hopper during compounding. For optimal dispersion, avoid excessive shear or prolonged residence time at elevated temperatures. Pre-blending with carrier resin may enhance uniformity in low-loading applications.
Q4: Does DOWSIL EP-2720 affect the mechanical properties of the base polymer?
A: At recommended dosage levels, it generally maintains key mechanical properties such as tensile strength and impact resistance. Some reduction in notched Izod impact may occur at higher loadings, but this is often offset by improvements in surface functionality and long-term wear performance.
Q5: Can DOWSIL EP-2720 be used in applications requiring regulatory compliance for indirect food contact?
A: DOWSIL EP-2720 is not pre-approved for food-contact applications under major global regulatory frameworks. Customers intending such use must conduct full formulation-level testing and obtain appropriate regulatory validation based on end-use conditions and applicable jurisdictional requirements.
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