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Dow DOWSIL SF 2904 Fluid is a high-quality product in the DOWSIL industrial general-purpose silicone fluid series, designed for industrial processing and building auxiliary systems. As a high-performance silicone fluid, it has excellent surface activity, lubricity and system compatibility, easy to add and disperse, optimizing processing performance and application effect of various products
Excellent Lubrication Performance - Reduces processing friction, decreases component loss, improves processing fluency
Good System Compatibility - Suitable for various industrial and building formulation systems, no delamination or precipitation
Convenient Processing - Good fluidity, easy to add and disperse, suitable for various production processes
Outstanding Surface Activity - Optimizes product surface performance, improves molding and use texture
Stable & Weather-Resistant Performance - Temperature and humidity resistant, stable performance for long-term use, suitable for complex working conditions
Industrial Lubrication Auxiliary - Mechanical component lubrication, processing aids, reducing friction loss
Building Auxiliary Processing - Building boards, sealing materials auxiliary, optimizing molding and performance
Silicone System Modification - Enhancing lubricity and dispersibility of other silicone products
Surface Treatment Auxiliaries - Surface treatment of various substrates, improving smoothness and protection
Insulating Material Auxiliary - Addition to industrial insulating materials, optimizing insulation performance and processability
| Active Ingredient | 100% (Typical) |
| Appearance | Clear to Pale Yellow Liquid (Typical) |
| Dynamic Viscosity (25℃) | 3500~5500 cP (Typical) |
| Surface Tension (25℃) | 23~26 mN/m (Typical) |
| Specific Gravity (25℃) | 1.02~1.05 (Typical) |
| Temperature Resistance Range | -30℃ ~ 150℃ (Typical) |
Q1: What is the primary function of DOWSIL SF 2904 Silicone Oil in industrial formulations?
A: DOWSIL SF 2904 Silicone Oil is a low-viscosity, reactive silicone fluid primarily used as a surface modifier and release aid. It imparts lubricity, improves substrate wetting, reduces friction, and enhances slip and mar resistance in coatings, inks, adhesives, and sealants.
Q2: Is DOWSIL SF 2904 compatible with common organic solvent-based and waterborne systems?
A: Yes — DOWSIL SF 2904 exhibits good compatibility with a broad range of solvent-based, high-solids, and waterborne systems. Its molecular structure allows for effective dispersion without causing haze or phase separation when properly incorporated, though compatibility testing under actual formulation conditions is recommended.
Q3: How should DOWSIL SF 2904 be incorporated into a formulation to ensure optimal performance?
A: It is typically added during the let-down or post-addition stage under moderate agitation. Avoid high-shear mixing at elevated temperatures prior to full dispersion, as this may affect stability. Dosage depends on formulation requirements but generally ranges from 0.1% to 2% by weight of the total system.
Q4: Does DOWSIL SF 2904 provide any curing or crosslinking functionality?
A: No — DOWSIL SF 2904 is a non-reactive, linear polydimethylsiloxane (PDMS) fluid. It does not contain functional groups such as amino, epoxy, or hydroxyl that participate in crosslinking reactions. Its role is physical modification rather than chemical integration into the polymer network.
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