Speciality Chemicals

3-(Triethoxysilyl)propyl Methacrylate

CAS No.21142-29-0
GradeIndustrial / Pharmaceutical
Availability● In Stock

High-purity 3-(Triethoxysilyl)propyl methacrylate (CAS 21142-29-0), a versatile silane coupling agent that enhances adhesion, mechanical strength, and electrical properties in composite materials and polymer formulations.

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Product Technical Details

Product Overview

3-(Triethoxysilyl)propyl methacrylate (CAS 21142-29-0) is a bifunctional organosilane widely employed as a coupling agent in advanced composite systems. This specialty chemical features a reactive methacrylate group and a hydrolyzable triethoxysilyl moiety, enabling it to form robust covalent bonds between inorganic substrates—such as glass fibers or mineral fillers—and organic polymer matrices. Its dual reactivity makes it indispensable in high-performance applications requiring enhanced interfacial adhesion, durability, and long-term stability.

Specifications

Molecular Formula	C₁₃H₂₆O₅Si
Molecular Weight	290.43 g/mol
Density	0.98 g/cm³
Boiling Point	312 °C
Flash Point	118.4 °C
Refractive Index	1.427
Purity (GC)	≥98.0%
Appearance	Clear to straw-colored liquid with mild odor

Industrial Applications

This silane coupling agent delivers significant performance improvements across multiple industrial sectors:

In unsaturated polyester and vinyl ester composites, it markedly enhances the wet mechanical strength and electrical insulation properties of glass fiber-reinforced materials.
In the wire and cable industry, when used to treat EPDM rubber compounds filled with clay and peroxide-cured, it reduces dielectric loss and improves specific inductive capacity.
Copolymers synthesized from this monomer with vinyl acetate, acrylic acid, or methacrylic acid are key components in high-adhesion coatings, structural adhesives, and durable sealants—offering superior weatherability, chemical resistance, and substrate bonding.

Stored in a cool, well-ventilated area away from moisture and ignition sources, 3-(Triethoxysilyl)propyl methacrylate is typically supplied in 200 kg drums or customized packaging to meet global manufacturing standards.