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High-viscosity, anionic silicone emulsion offering excellent film-forming capability and surface lubricity.
Provides outstanding water repellency and moisture barrier performance on porous and non-porous substrates.
Compatible with a broad range of water-based systems including acrylics, vinyl acetates, and polyurethane dispersions.
Delivers durable softness, slip, and anti-blocking properties without compromising substrate breathability.
Stable across pH 4–9 and exhibits good freeze-thaw resistance for reliable handling and storage.
Textile finishing for durable water repellency and hand softening in apparel and technical fabrics.
Leather finishing to enhance surface smoothness, water resistance, and abrasion resistance.
Additive in architectural coatings for improved substrate wetting, mar resistance, and stain repellency.
Component in paper and board coatings to impart release characteristics and moisture barrier functionality.
Functional additive in nonwovens for hygiene and filtration applications requiring hydrophobicity and flexibility.
| Chemical Type | Dimethyl silicone polymer emulsion (anionic) |
| Product Form | White to off-white liquid emulsion |
| Appearance | Opaque, homogeneous liquid with slight opalescence |
| Active Content (wt%) | 35 ± 1% |
| pH (1% aqueous solution) | 6.0 – 7.5 |
| Viscosity (Brookfield, #4 spindle, 20 rpm, 25°C) | 8,000 – 12,000 cP |
| Particle Size (D50) | 5 – 15 µm |
| Freeze-Thaw Stability | Stable after 3 cycles (-10°C/24 h → 25°C/24 h) |
Q1: What is the primary function of DOWSIL HV 496 in coating and ink formulations?
A: DOWSIL HV 496 is a high-viscosity silicone emulsion designed to provide surface leveling, substrate wetting, and foam control in water-based coatings, inks, and graphic arts systems. It helps reduce surface defects such as craters, orange peel, and pinholes while enhancing gloss uniformity and substrate adhesion.
Q2: Is DOWSIL HV 496 compatible with other additives like defoamers or rheology modifiers?
A: Yes, DOWSIL HV 496 is generally compatible with common waterborne formulation components including associative and non-associative thickeners, anionic and nonionic surfactants, and many conventional defoamers. However, compatibility should be verified experimentally in the final formulation due to potential interactions with strongly cationic additives or highly reactive crosslinkers.
Q3: How should DOWSIL HV 496 be incorporated into a formulation?
A: It is recommended to add DOWSIL HV 496 during the let-down stage, after pigment dispersion and under moderate agitation. Avoid high-shear mixing post-addition to prevent destabilization of the emulsion. Pre-dilution with water or formulation water phase may improve uniform incorporation, especially in low-viscosity systems.
Q4: Can DOWSIL HV 496 be used in food-contact or pharmaceutical applications?
A: DOWSIL HV 496 is not specifically designed or certified for direct food-contact or pharmaceutical use. While it may be suitable for certain indirect applications (e.g., release aids on packaging substrates), regulatory compliance must be confirmed case-by-case with relevant authorities and supported by appropriate documentation from Dow.
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