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High-solids, anionic silicone emulsion offering excellent stability in aqueous systems.
Delivers superior softness, lubricity, and hydrophobicity on treated substrates.
Compatible with common textile auxiliaries including cationic, nonionic, and some anionic agents.
Low foaming profile suitable for continuous industrial processing such as padding and spray applications.
Enables durable water repellency without compromising fabric breathability or hand feel.
Textile finishing for cotton, polyester, and blended fabrics.
Nonwoven fabric treatment to enhance softness and drape.
Leather surface conditioning for improved suppleness and moisture resistance.
Technical textiles requiring hydrophobic yet breathable performance.
Industrial wipes and hygiene products requiring skin-compatible softening.
| Chemical Type | Dimethyl silicone polymer emulsion |
| Product Form | Opaque white liquid emulsion |
| Appearance | Viscous, milky white liquid |
| Active Content | 30 ± 1 wt% |
| pH (1% Aqueous Solution) | 5.5 – 6.5 |
| Density (25°C) | Approx. 0.98 – 1.02 g/cm³ |
| Storage Temperature | 5 – 35°C (do not freeze) |
| Primary Applications | Textile and nonwoven softening, water repellency, and surface conditioning |
Q1: What is the primary function of DOWSIL SM 8709 SR in coatings and inks?
A: DOWSIL SM 8709 SR is a silicone-based emulsion designed to provide surface modification effects—such as improved slip, mar resistance, and substrate wetting—in waterborne coatings, graphic arts inks, and related systems. It functions by migrating to the film-air interface during drying/curing, delivering a durable, low-surface-energy layer.
Q2: Is DOWSIL SM 8709 SR compatible with anionic, cationic, and nonionic formulations?
A: DOWSIL SM 8709 SR is formulated as a stable, anionic silicone emulsion and demonstrates good compatibility with most anionic and nonionic systems. Compatibility with strongly cationic or highly acidic formulations should be verified experimentally, as charge interactions may affect stability or performance.
Q3: How should DOWSIL SM 8709 SR be incorporated into a formulation?
A: It is typically added during the let-down stage under gentle agitation to avoid excessive shear or air entrapment. Pre-dilution with water or a compatible solvent may aid dispersion. Avoid high-shear mixing post-addition to preserve emulsion integrity and ensure uniform distribution.
Q4: Does DOWSIL SM 8709 SR require thermal curing to develop its full performance benefits?
A: No—performance benefits such as slip and surface leveling are generally realized during ambient drying or standard cure cycles. However, optimal surface migration and durability are enhanced when the system undergoes typical film formation conditions, including moderate temperature exposure and sufficient coalescence time.
Q5: Can DOWSIL SM 8709 SR be used in direct food-contact applications?
A: DOWSIL SM 8709 SR is not pre-approved for direct food-contact use. Formulators must conduct full regulatory evaluation—including migration testing and compliance verification—against applicable regional requirements before considering it for such applications.
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