High hydrolytic stability due to the sterically hindered isobutyl group.
Excellent coupling efficiency between inorganic substrates (e.g., glass, metals, minerals) and organic polymers.
Low volatility and favorable handling characteristics compared to smaller alkyltrimethoxysilanes.
Enhanced moisture resistance in cured composites and sealants.
Compatible with a broad range of resin systems including epoxies, polyurethanes, and acrylics.
Adhesion promoters in automotive and industrial sealants.
Surface modifiers for silica, calcium carbonate, and other mineral fillers in thermoset composites.
Hybrid sol-gel precursors for protective coatings and functionalized thin films.
Coupling agent in glass fiber sizing formulations for reinforced plastics.
Moisture-scavenging additive in moisture-cure polyurethane adhesives and elastomers.
| Chemical Type | Organofunctional alkoxysilane |
| Product Form | Clear, colorless to pale yellow liquid |
| Appearance | Homogeneous liquid, free from visible particulates |
| Molecular Weight | 220.3 g/mol |
| Boiling Point (760 mmHg) | 195–198 °C |
| Density at 25 °C | 0.945–0.955 g/cm³ |
| Refractive Index (n20D) | 1.392–1.398 |
| Solubility | Miscible with common organic solvents (e.g., alcohols, acetone, toluene); hydrolyzes in water |
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