Silane Emulsion
Overview
Silane Emulsion is a water-based dispersion of organosilane compounds, combining the reactivity of silanes with the ease of aqueous application. It bridges organic and inorganic materials, making it indispensable in industries requiring surface modification. Developed as an eco-friendly alternative to solvent-based silanes, these emulsions offer low VOC emissions while maintaining performance in adhesion, water repellency, and crosslinking applications.
Physical and Chemical Properties
The emulsion typically exhibits neutral to slightly acidic pH (4-7) and contains 20-40% active silane components. Particle size ranges from 50-500 nm, ensuring colloidal stability. Key chemical behaviors include hydrolysis upon application, forming silanol groups that bond with substrates like glass, metals, or minerals. This creates durable hydrophobic or coupling layers depending on the functional groups (e.g., amino, epoxy, alkyl).
Main Applications
In construction, it penetrates concrete pores to form waterproof barriers without blocking vapor transmission (breathability). This extends structure lifespan in bridges and parking garages. The textile industry uses it for fiber sizing and moisture management, while coatings incorporate it to improve wet adhesion on challenging substrates like plastics or galvanized steel.
Safety and Storage
Though water-based, silane emulsions require careful handling due to potential skin sensitization. Spills should be contained with absorbents, not flushed with water to avoid spreading. Storage tanks should be polyethylene or stainless steel to prevent catalytic decomposition. Shelf life extends when stored below 30°C, with occasional agitation recommended for long-term storage.
B2B Procurement Guide
Industrial buyers should specify: 1) Silane type (e.g., amino vs epoxy functional), 2) Required dilution ratio, 3) Compatibility with existing formulations (test recommended). Bulk shipments (IBC totes or tankers) reduce costs for high-volume users. Quality certifications like ISO 9001 and REACH compliance are critical for European markets.
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