Methacryloxypropylmethyldimethoxysilane

Methacryloxypropylmethyldimethoxysilane (CAS 14513-34-9), also known commercially as 3-(dimethoxymethylsilyl)propyl methacrylate, is a bifunctional organosilane coupling agent that bridges organic polymer matrices with inorganic substrates.

Where is Methacryloxypropylmethyldimethoxysilane used?

• Coatings and adhesives: improves adhesion to glass, metals and mineral fillers by anchoring the organic binder to the substrate surface
• Sealants and elastomers: crosslinker for moisture-cure networks with controlled flexibility and durability
• Electronics: surface primer or additive in encapsulants and underfill resins for interfacial adhesion to silicon or ceramic components
• Fiber-reinforced composites and filled polymer systems: treats filler surfaces to improve dispersion and mechanical integration
• It carries a hydrolyzable silane group and a reactive methacrylate group, enabling surface bonding and participation in radical polymerization networks.

Commercial specifications

• Technical grade, purity typically 97% or higher
• Specialty grades for electronics or optical applications may carry tighter purity and low-halide specifications
• Clear liquid in packaging from small laboratory quantities to bulk drums