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98% Triethoxyoctylsilane / N-octyltriethoxysilane Cas 2943-75-1 QM-W328

CAS No.:2943-75-1
Purity:99%
Place of Origin:Henan China
MF:C14H32O3Si
Appearance:Colorless clear liquid
Certification:MSDS,COA,TDS
Free Samples

CATEGORY

n-Octyltriethoxysilane, with the chemical formula C₁₄H₃₂O₃Si, is an important organosilane coupling agent. Its molecular structure contains a hydrophilic triethoxysilane group and a hydrophobic n-octyl long-chain alkyl group. At room temperature, it is a colorless and transparent liquid with good chemical stability and weather resistance, and is soluble in a variety of organic solvents.

As a monofunctional silane coupling agent, n-octyltriethoxysilane is mainly used to improve the interfacial bonding between inorganic materials and organic polymers. In the rubber industry, it is often used as a surface modifier for inorganic fillers (such as silica), effectively reducing the viscosity of the filler, improving the processing performance of rubber mixtures, and significantly enhancing the mechanical strength and aging resistance of composite materials. Furthermore, due to its excellent hydrophobicity, this substance also has wide applications in building waterproofing, concrete protection, antifouling coatings, and textile finishing.

Product picture:

Comparable Products:

Dow Corning Z-6341

Evonik: OCTEO

Momen-tive:A-137

Function

In the rubber industry, n-octyltriethoxysilane is an important inorganic filler modifier, particularly suitable for rubber systems containing precipitated silica. It effectively reduces the viscosity of silica fillers, improves the processing fluidity of rubber mixtures, and solves the “Payne effect” (a sharp increase in viscosity) problem caused by silica filling. Through coupling, it significantly improves the tensile strength, tear strength, and abrasion resistance of rubber composites while maintaining good elasticity. This product is widely used in the production of high-performance tires, sealing strips, conveyor belts, and shock-absorbing products.

Utilizing its excellent hydrophobicity and penetrating ability, n-octyltriethoxysilane is widely used as a building waterproofing and protective agent. It can penetrate into the concrete, reacting with alkaline substances to form a water-insoluble siloxane network, effectively preventing the penetration of water, chloride ions, and harmful gases, thus preventing steel corrosion and concrete weathering. Furthermore, it is also commonly used for the protection of marble, granite, and other stone materials, preventing water stains, efflorescence, and freeze-thaw damage.

As a coating additive, n-octyltriethoxysilane improves the water resistance, scrub resistance, and storage stability of coatings, and is often used as an antifouling agent and antisettling agent. In the pigment industry, it is used to treat inorganic pigments (such as titanium dioxide and calcium carbonate), altering their surface polarity to make them easier to disperse in organic media, thereby improving the pigment’s gloss and application performance.

In the textile industry, this substance is used for finishing textiles, giving fabrics excellent water-repellent, oil-repellent, and stain-resistant properties, and is commonly used in the finishing of outdoor clothing and furniture fabrics. In the electronics field, it can be used as a moisture-proof coating and sealing material for electronic components, improving the insulation and thermal stability of encapsulation materials. Furthermore, it can be used for anti-fogging, anti-fingerprint, and scratch-resistant treatments on glass surfaces.

Technical Specifications:

Items	Specification
Appearance	colorless transparent liquid
Purity (%)	98%min
Colour (Pt-Co)	30max
Density (ρ 20, g/cm3)	0.8790±0.0050
Refractive Index (n25D)	1.4140±0.0050
Package	1 L/bottle, 25 L/drum, 200 L/drum
HS code	29310095