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Dow VORASURF SF 2936 Additive is a special surfactant in the VORASURF series, designed for cold storage systems and building insulation panel systems. As a high-performance silicone surfactant, it optimizes the foaming and molding effect of insulation panels, enhances system compatibility and stability, with convenient processing and high adaptability,
Efficient Foam Stabilization & Homogenization - Ensures stable foaming process, avoiding foam collapse and uneven cells
Non-Hydrolyzable & Stable - Stable chemical properties, suitable for complex processing environments
Excellent System Compatibility - Good compatibility with PU foaming raw materials, strong processing adaptability
Elasticity Enhancement - Optimizes the elasticity of finished foam, improving mechanical stability
High Efficiency at Low Dosage - Achieves excellent foaming regulation effect with small addition
Efficient Foam Stabilization & Homogenization - Ensures stable foaming process, avoiding foam collapse and uneven cells
Non-Hydrolyzable & Stable - Stable chemical properties, suitable for complex processing environments
Excellent System Compatibility - Good compatibility with PU foaming raw materials, strong processing adaptability
Elasticity Enhancement - Optimizes the elasticity of finished foam, improving mechanical stability
High Efficiency at Low Dosage - Achieves excellent foaming regulation effect with small addition
| Brand | DOW |
| Chemical Composition | Non-Hydrolyzable Silicone Surfactant |
| Appearance | Colorless to Pale Yellow Liquid |
| Specific Gravity (25℃) | 1.01 |
| Flash Point (Open Cup) | 186℃ |
| Active Ingredient Content | 100% (Typical) |
| Viscosity (25℃) | 300 - 1500 Centipoise (cP) (Typical) |
Q1: What is the primary function of Dow VORASURF SF 2936 in coating and ink formulations?
A: Dow VORASURF SF 2936 is a silicone oil designed to act as a surface additive that improves substrate wetting, reduces surface defects (e.g., craters and orange peel), and enhances leveling and gloss uniformity—without significantly affecting intercoat adhesion or recoatability.
Q2: Is Dow VORASURF SF 2936 compatible with waterborne and solventborne systems?
A: Yes, it demonstrates broad compatibility across both waterborne and solventborne coatings, inks, and overprint varnishes. Its formulation is engineered for stable dispersion and minimal foaming risk in aqueous media, while remaining miscible with common organic solvents and resins.
Q3: How should Dow VORASURF SF 2936 be incorporated into a formulation?
A: It is typically added during the let-down stage under moderate agitation. Pre-dilution with a compatible carrier solvent or resin solution is recommended for optimal dispersion, especially in high-solids or viscous systems. Avoid high-shear mixing post-addition to prevent potential re-agglomeration.
Q4: Does Dow VORASURF SF 2936 affect film hardness or cure response?
A: When used at typical dosage levels, it does not interfere with crosslinking mechanisms or final film hardness development in thermosetting systems. However, excessive addition may delay surface cure or reduce mar resistance, so optimization within the recommended use range is advised.
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