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Non-ionic, vinyl-functional silicone emulsion designed for high-stability aqueous systems.
Enables efficient hydrosilylation crosslinking in water-based formulations without co-solvents.
Offers excellent film-forming capability and durable hydrophobicity on porous substrates.
Low VOC and APEO-free, supporting compliance with stringent environmental and regulatory requirements.
Compatible with common waterborne acrylics, polyurethanes, and cellulose derivatives.
Waterborne architectural coatings for enhanced water repellency and breathability.
Textile finishing agents to impart soft hand, wrinkle resistance, and moisture management.
Construction sealants and grouts requiring improved flexibility and substrate adhesion.
Wood coatings where dimensional stability and surface hydrophobicity are critical.
Specialty paper treatments for grease resistance and surface sizing enhancement.
| Chemical Type | Vinyl-functional polydimethylsiloxane (PDMS) emulsion |
| Product Form | Aqueous emulsion |
| Appearance | Opaque white to off-white liquid |
| pH (1% aqueous dilution) | 5.5 – 7.0 |
| Solids Content (wt%) | 30.0 ± 1.5% |
| Viscosity (mPa·s, Brookfield RVT, #2 spindle, 20 rpm) | 50 – 200 |
| Particle Size (D50, nm) | 150 – 300 |
| Freeze-Thaw Stability | Passes 3 cycles (−10°C/24 h → 23°C/24 h) |
Q1: What is the primary function of DOWSIL 7-3120 in coating and ink formulations?
A: DOWSIL 7-3120 is a vinyl-functional silicone emulsion designed to enhance surface leveling, reduce surface tension, and improve substrate wetting—particularly on low-energy surfaces—without significantly affecting gloss or intercoat adhesion.
Q2: Is DOWSIL 7-3120 compatible with waterborne acrylic and polyurethane systems?
A: Yes, it is formulated for compatibility with a broad range of waterborne polymer dispersions, including acrylics, styrene-acrylics, and anionic polyurethanes. Compatibility should be verified in the final formulation due to sensitivity to pH, ionic strength, and other additives.
Q3: How should DOWSIL 7-3120 be incorporated into a formulation?
A: It is typically added during the let-down stage under gentle agitation. Avoid high-shear mixing post-addition to prevent potential destabilization of the emulsion. Pre-dilution with water may aid uniform dispersion in sensitive systems.
Q4: Does DOWSIL 7-3120 contribute to foam control or require additional defoamers?
A: While it is not a dedicated defoamer, its surface-active nature may modestly influence foam behavior. In most cases, standard defoamer selection remains necessary—especially in high-shear processes—and compatibility testing with the chosen defoamer is recommended.
Q5: Can DOWSIL 7-3120 be used in food-contact coatings?
A: DOWSIL 7-3120 is not pre-approved for direct food-contact applications. Formulators must conduct full regulatory evaluation—including migration testing and compliance verification—against applicable regional requirements before use in such systems.
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E-mail: wangxingqiang@ericwchem.com
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