3-(trimethoxysilyl)propyl methacrylate

3-(Trimethoxysilyl)propyl methacrylate (CAS 2530-85-0) is a bifunctional silane coupling agent that bridges organic polymer matrices with inorganic substrates.

Where is 3-(trimethoxysilyl)propyl methacrylate used?

• Fiber-reinforced composites: pre-treats glass fibers to strengthen the fiber-resin interface in automotive and aerospace structures
• Coatings: adhesion promoter in UV-curable and thermally cured systems for glass, metal, and mineral substrates
• Adhesives and sealants: reactive crosslinker for durability under humid or thermally cycled conditions
• Electronics: surface primer for encapsulants and underfill resins
• It bonds chemically to both surfaces, improving adhesion and moisture resistance.
• Used in resin systems cured via a free radical mechanism, such as polyester and acrylic systems, and as a blend additive in filled or reinforced thermoplastic polymers including polyolefins and polyurethanes.
• Acts as a functional comonomer in the preparation of polystyrene latex having silanol by emulsion polymerization.

Good to know: Commonly inhibited with a polymerization inhibitor for storage stability.

Formulation notes

• Has a slower hydrolysis rate than methacryloxymethyltrimethoxysilane.
• Inhibited with MEHQ and HQ.

Typical specification

• Supplied at 98% purity stabilized with 100 ppm BHT.
• Assay specification is ≥98%.
• Color scale of ≤70 APHA.
• GC purity of ≥97.5%.

Storage, packaging and handling

• May darken on storage.
• Recommended storage: store in a cool and dry place; keep tightly closed; keep away from heat, open flame.

Frequently asked questions about 3-(trimethoxysilyl)propyl methacrylate

What forms and appearance does 3-(trimethoxysilyl)propyl methacrylate have?

It is available as a dry powder as well as a liquid, and the appearance specification is a colourless transparent liquid.

Which resin systems benefit from this silane as a coupling agent?

It is used as a coupling agent to improve the physical and electrical properties of glass-reinforced and mineral-filled thermoset resins when exposed to heat and/or moisture.

Can the silane be combined with other monomers to modify polymer properties?

It can be combined with vinyl acetate to synthesize silane-modified polymers curable at room temperature.

Technical content is compiled and updated by the SoleChem product team from public technical sources; the certificate of analysis (COA) governs product-specific specifications.