3-(Dimethoxymethylsilyl)propyl methacrylate CAS No. 14513-34-9

Product Description

3-(Dimethoxymethylsilyl)propyl methacrylate is a dual-functional organosilane that marries a polymerizable methacrylate tail to a moisture-reactive silane head. The molecule contains a CH₂=C(CH₃)COO– group that copolymerizes readily with acrylic resins, a three-carbon propyl spacer, and a (CH₃O)₂(CH₃)Si– moiety that hydrolyzes to silanols and condenses with hydroxyl-bearing surfaces such as glass, silica, or metal oxides. This combination makes it a key adhesion promoter in paints, coatings, adhesives, and fiber-reinforced composites, where it forms durable organic–inorganic bridges, and it is equally valued in dental cements and advanced optical or electronic encapsulants. Because the dimethoxy silane is moisture-sensitive, it must be stored under dry, inert conditions and handled with gloves and adequate ventilation.

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Product Use & Characteristics

Identity & Structure

• IUPAC Name: 3-[dimethoxy(methyl)silyl]propyl 2-methylprop-2-enoate

• Molecular Formula: C₁₀H₂₀O₄Si

• Molecular Weight: 232.35 g mol⁻¹

• CAS: 14513-34-9

Key Properties & Characteristics

Feature	Description
Dual-functionality	• Methacrylate tail → free-radical polymerisation with acrylic, vinyl, polyester resins
Reactivity	Moisture-triggered cross-linking; UV-curable; forms covalent organic–inorganic bridges
Physical Form	Clear liquid, moisture-sensitive (store under N₂/dry air)
Safety	Use gloves/eye protection, fume-hood; avoid humidity

Uses / Application Areas

• Adhesion Promoter – paints, inks, adhesives, sealants on glass, metals, ceramics

• Glass-fiber & Filler Sizing – boosts flexural/tensile strength of glass-reinforced plastics, acrylic, polyester, epoxy composites

• Surface Modification – functionalises silica, quartz, metal oxides for better resin compatibility in dental composites, fiber-reinforced plastics, electronic encapsulants

• Co-monomer / Cross-linker – raises cross-link density, hardness (up to 5H pencil) and weather resistance of acrylic coatings; used in UV-curable PDMS-PTFPMS membranes for ethanol pervaporation

• Biomaterials – resin-modified glass-ionomer cements, orthopedic/bone-bonding devices

• Wire & Cable – silane-crosslinked polyethylene insulation

Typical Performance Benefits

• Enhanced wet & dry adhesion

• Improved mechanical strength (flexural, impact) and electrical properties

• Superior water-, UV- and weather resistance

• Faster UV-cure cycles (30–50 s demonstrated in membranes)

Why us!

Qingdao Sigma Chemical Co., Ltd., established in January 2017 and headquartered in Qingdao, China, is a reliable chemical supplier. Specializing in pharmaceuticals, biochemical intermediates, and research chemicals, the company offers a diverse product portfolio, including peptides (e.g., Tirzepatide, Semaglutide), nootropics, veterinary products, and APIs, often marketed with ≥99% purity and COA certification. We provides R&D, custom synthesis, and contract manufacturing services at various scales, while claiming a global export presence across 100+ countries. With international warehouses in the USA, Europe, Australia, and Canada, Qingdao Sigma Chemical also facilitates drop-shipping and reshipments, positioning itself as a key supplier for laboratory and research applications.