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Highly stable, anionic silicone emulsion with excellent shelf life and freeze-thaw stability.
Provides superior softness, smoothness, and hydrophobicity on textile and nonwoven substrates.
Low foaming formulation designed for compatibility in high-shear industrial processing equipment.
Easily incorporated into aqueous systems without requiring pre-dilution or special handling.
Complies with major global regulatory frameworks including REACH and FDA indirect food contact guidelines (21 CFR 175.300).
Textile finishing for cotton, polyester, and blended fabrics to enhance hand feel and wrinkle resistance.
Nonwoven treatment in hygiene products (e.g., baby wipes, feminine care materials) for improved softness and skin compatibility.
Leather surface conditioning to impart water repellency and tactile refinement.
Coating additives for paper and board to improve slip, moisture barrier, and surface uniformity.
Industrial cleaning formulations where silicone-based soil release and anti-static performance are required.
| Chemical Type | Anionic methyl/phenyl silicone emulsion |
| Product Form | Opaque white liquid |
| Appearance | Homogeneous, low-viscosity emulsion |
| Active Content (wt%) | 30 ± 1% |
| pH (10% aqueous solution) | 5.5 – 6.5 |
| Density (25°C) | 0.98 – 1.02 g/cm³ |
| Primary Applications | Textile & nonwoven softening, leather conditioning, paper coating |
| Key Features | Softening, hydrophobicity, thermal stability up to 180°C (cured) |
Q1: What is the primary function of DOWSIL SM 8627 EX in coating and ink formulations?
A: DOWSIL SM 8627 EX is a non-ionic silicone emulsion designed to provide surface leveling, substrate wetting, and foam control in water-based coatings, inks, and adhesives. It helps reduce surface defects such as craters, orange peel, and pinholes while enhancing gloss uniformity and substrate coverage.
Q2: Is DOWSIL SM 8627 EX compatible with other additives like defoamers or rheology modifiers?
A: Yes, it is generally compatible with common water-based formulation components, including associative and non-associative thickeners, acrylic and polyurethane dispersions, and many conventional defoamers. However, compatibility should be verified experimentally in the final formulation due to potential interactions with highly ionic or strongly surfactant-active systems.
Q3: How should DOWSIL SM 8627 EX be incorporated into a formulation?
A: It is recommended to add DOWSIL SM 8627 EX during the let-down stage, after pigments and primary binders are dispersed, and under moderate agitation. Pre-dilution with water may improve dispersion in sensitive systems. Avoid high-shear addition directly to low-viscosity aqueous phases to minimize temporary cloudiness or instability.
Q4: Does DOWSIL SM 8627 EX affect the drying time or film formation of water-based systems?
A: At typical use levels, it does not significantly delay drying or impair film coalescence. Its silicone content remains at the air–film interface and does not interfere with binder particle fusion. However, excessive dosage may lead to surface migration that could influence overprintability or intercoat adhesion in multilayer applications.
Q5: Can DOWSIL SM 8627 EX be used in direct food-contact coatings?
A: DOWSIL SM 8627 EX is not pre-approved for direct food-contact applications. Customers intending to use it in such contexts must conduct full regulatory evaluation—including migration testing and compliance assessment—according to applicable regional requirements and end-use conditions.
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