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Provides excellent release performance on low-surface-energy substrates including PET, PP, and PE films.
Offers outstanding thermal stability up to 230°C during high-speed converting operations.
Delivers consistent, uniform coating with low haze and minimal migration risk.
Formulated as a non-ionic, water-based silicone emulsion for safe handling and reduced VOC emissions.
Enables rapid drying and good rewettability for efficient roll-to-roll processing.
Release liners for pressure-sensitive adhesives (PSAs) in tapes and labels.
Coated papers and films used in medical device packaging.
Backing materials for hygiene products including diapers and feminine care pads.
Release coatings for graphic arts and digital printing substrates.
Interleaf layers in composite manufacturing and molded rubber part handling.
| Chemical Type | Methylphenyl silicone polymer emulsion |
| Product Form | Aqueous emulsion |
| Appearance | Opaque white liquid |
| Solids Content | 35 ± 1 wt% |
| pH (at 25°C) | 6.0 – 7.0 |
| Viscosity (Brookfield, #2 spindle, 20 rpm, 25°C) | 100 – 300 cP |
| Density (25°C) | 1.00 – 1.03 g/cm³ |
| Freeze-Thaw Stability | Passes 3 cycles (–10°C for 16 h / 25°C for 8 h) |
Q1: What is the primary function of Dow SYL-OFF 7990 in coating formulations?
A: Dow SYL-OFF 7990 is a silicone emulsion designed to provide surface modification and release performance in water-based coatings. It enhances substrate wetting, improves slip and mar resistance, and imparts controlled release characteristics—particularly useful in protective or functional barrier coatings.
Q2: Is Dow SYL-OFF 7990 compatible with common water-based polymer systems?
A: Yes, it is formulated for compatibility with a broad range of water-based acrylics, vinyl acetates, styrene-butadiene, and polyurethane dispersions. Compatibility should be verified in the final formulation due to sensitivity to pH, ionic strength, and shear history.
Q3: How is Dow SYL-OFF 7990 typically incorporated into a coating process?
A: It is generally added during the let-down stage under low-shear conditions to preserve emulsion integrity. Pre-dilution with deionized water may aid dispersion. Avoid high-shear mixing post-addition and exposure to strong acids or oxidizing agents.
Q4: Does Dow SYL-OFF 7990 contribute to film-forming properties or act solely as an additive?
A: It functions primarily as a performance additive rather than a film former. While it migrates to the air–film interface to modify surface properties, it does not significantly contribute to cohesive strength or continuous film formation on its own.
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