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High-solids, water-based silicone elastomer emulsion offering excellent film-forming capability.
Delivers soft, flexible, and durable elastomeric films with low modulus and high elongation.
Compatible with common waterborne polymers and additives, enabling easy formulation integration.
Provides outstanding thermal stability and hydrophobicity after film formation.
Low VOC content and APEO-free, supporting sustainable and regulatory-compliant formulations.
Textile coatings for soft hand feel, stretch recovery, and water repellency.
Leather finishing agents to enhance flexibility, abrasion resistance, and surface smoothness.
Waterborne industrial coatings requiring elastic, non-yellowing topcoats.
Specialty paper coatings for improved tear strength and dimensional stability.
Adhesive modifiers to impart elasticity and stress relaxation in pressure-sensitive systems.
| Chemical Type | Emulsified silicone elastomer (polydimethylsiloxane-based) |
| Product Form | White to off-white stable aqueous emulsion |
| Appearance | Opaque liquid with slight opalescence |
| Solids Content | 25 ± 1 wt% |
| pH (as received) | 6.0 – 7.5 |
| Viscosity (Brookfield, #2 spindle, 20 rpm, 25°C) | 50 – 200 mPa·s |
| Particle Size (D50) | 0.2 – 0.5 µm |
| Freeze-Thaw Stability | Stable after one cycle (–20°C for 16 h, then thawed at 25°C) |
Q1: What is the primary function of DOWSIL PF-2520 in silicone-based coatings and sealants?
A: DOWSIL PF-2520 is a non-reactive, high-solids elastomer emulsion designed to enhance flexibility, elongation, and low-temperature performance in cured silicone systems—without interfering with crosslinking chemistry.
Q2: Is DOWSIL PF-2520 compatible with platinum-cure (addition-cure) silicone formulations?
A: Yes, it is formulated to be compatible with platinum-cure systems and does not contain inhibitors or contaminants known to poison platinum catalysts—however, compatibility testing under end-use conditions is recommended.
Q3: How should DOWSIL PF-2520 be incorporated into aqueous or solvent-containing silicone dispersions?
A: It can be added directly during the dispersion phase using low-shear mixing; pre-dilution with water or compatible solvents may improve uniformity. Avoid high-shear processing that could destabilize the emulsion.
Q4: Does DOWSIL PF-2520 require post-application heat curing to develop full elastomeric properties?
A: No—its elastomeric functionality develops upon ambient drying and coalescence of the emulsion particles; thermal treatment is not required but may accelerate film formation in high-humidity environments.
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