CAS 3069-21-4 Dodecyltrimethoxysilane QM-W3112

CAS No.:3069-21-4
Purity:99%
Place of Origin:Henan China
MF:C15H34O3Si
Appearance:Colorless liquid
Certification:MSDS,COA,TDS
Free Samples

CATEGORY

n-Dodecyltrimethoxysilane is an organosilicon compound, belonging to the silane coupling agent family. Its molecular structure simultaneously contains long-chain dodecyl hydrophobic groups and trimethoxysilyl hydrophilic reactive groups. This unique “amphibious” structure allows it to form a dense hydrophobic film on the surface of inorganic materials, significantly improving their waterproof, oil-proof, and anti-fogging properties.

This compound is a colorless, transparent liquid at room temperature and is mainly prepared through hydrosilylation and alcoholysis reactions. It is commonly used as a surface modifier, widely applied in the surface treatment of glass, ceramics, and metals to enhance their compatibility with organic polymers or impart special physicochemical properties. It has important applications in building waterproofing, optical component protection, engineering plastic modification, and cultural relic preservation.

Product picture:

Comparable Products:

Evonik: DOTMO

Function

Leveraging its strong hydrophobic properties, n-dodecyltrimethoxysilane is often used as a highly effective surface waterproofing agent. By treating the surfaces of materials such as glass, ceramics, and metals, it forms a dense hydrophobic protective film, significantly reducing the surface contact angle. This treatment not only imparts excellent waterproof and oil-repellent properties to the materials but also effectively prevents fogging on glass surfaces, maintaining surface transparency and cleanliness. In the construction industry, it can be used for waterproofing and corrosion protection of buildings, effectively preventing damage to building structures from acid rain and freeze-thaw cycles.

As a coupling agent, n-dodecyltrimethoxysilane can significantly improve the dispersibility and compatibility of inorganic fillers (such as silica, kaolin, and talc) in organic polymers (such as plastics and rubber). This not only improves the mechanical strength of composite materials but also enhances their water resistance and chemical corrosion resistance. For example, in the modification of engineering plastics, it helps inorganic fillers better integrate into the plastic matrix, improving the overall performance of the product.

In the optical field, this substance is widely used to protect optical components (such as lenses, prisms, and mirrors). The treated optical surface effectively prevents the adhesion of fingerprints, oil, and dust, keeping the surface clean and improving the lifespan of optical components and image quality. It can also be used to protect precision optical instruments with graduations and metal frames.

Beyond these applications, n-dodecyltrimethoxysilane can be used to protect outdoor artifacts, preventing damage from acid corrosion and weathering. In the textile industry, it can be used as a fabric finishing agent, giving fabrics a soft feel and good waterproof and stain-resistant properties. Furthermore, in rubber and plastics processing, it can be used as a mold release agent, effectively reducing the adhesion of products to the mold.

Technical Specifications:

TESTING ITEMS	SPECIFICATIONS	RESULTS
Appearance	Colorless transparent liquid	Conforms
Color(Pt-Co)	≤30	5
Dodecene	≤3.00%	1.20%
Tetramethoxysilane	≤3.00%	1.80%
Refractive index 20℃	1.422~1.432	1.426
Assay	≥97.0%	97.8%