Description

n-Octadecyl-N'-[3-(Triethoxysilyl)Propyl]Urea is a specialized organosilane coupling agent that combines a long-chain alkyl urea moiety with a reactive triethoxysilyl group. This unique bifunctional structure is engineered to create durable covalent bonds between inorganic substrates and organic polymers, significantly enhancing material compatibility and performance. It is essential for formulators and material scientists in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as in advanced composites and surface modification technologies, seeking to improve adhesion, dispersion, and long-term stability.

Application

• Adhesion Promoter: Used in paints, coatings, and adhesives to dramatically improve the bond strength between organic resins (e.g., epoxies, polyurethanes) and inorganic surfaces like metals, glass, and minerals.
• Surface Modification Agent: Imparts hydrophobic and oleophobic properties to fillers (silica, calcium carbonate) and pigments, enhancing their dispersion in polymer matrices and reducing moisture sensitivity.
• Fiber Sizing for Composites: Acts as a key coupling agent in glass or carbon fiber reinforcements for thermoset and thermoplastic composites, optimizing stress transfer and mechanical properties.
• Rubber and Elastomer Compounding: Improves the interaction between silica fillers and rubber polymers in tire treads and industrial rubber goods, leading to better abrasion resistance and lower rolling resistance.
• Sealant and Caulk Formulations: Enhances adhesion to difficult substrates (aluminum, glass, ceramic) while maintaining flexibility and weatherability in construction and automotive sealants.
• Nanomaterial Functionalization: Employed to modify the surface of nanoparticles (e.g., SiO2, TiO2) for specialized applications in electronics, catalysis, and advanced materials.

Basic Information

Product Name	n-Octadecyl-N'-[3-(Triethoxysilyl)Propyl]Urea
CAS No.	106868-86-4
Molecular Formula	C28H60N2O4Si
Molecular Weight	516.9 g/mol
Synonyms	3-(Triethoxysilyl)propyl octadecyl urea; Octadecyl[3-(triethoxysilyl)propyl]urea; Urea, N-octadecyl-N'-[3-(triethoxysilyl)propyl]-; Silane coupling agent KBM-6057 (commercial equivalent); N-Octadecyl-N-triethoxysilylpropyl urea; (3-Triethoxysilylpropyl) octadecyl urea; Organosilane adhesion promoter; Long-chain alkyl alkoxysilane
EINECS	Contact for details

Quality Control

Our production of n-Octadecyl-N'-[3-(Triethoxysilyl)Propyl]Urea adheres to a strict quality management system to ensure batch-to-batch consistency and performance reliability. Each lot is analyzed against stringent in-house specifications, with key parameters including purity, refractive index, and active content. A comprehensive Certificate of Analysis (COA) documenting these results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture. Keep away from strong acids and bases.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Refractive Index (n20/D)	1.450 - 1.455
Density (g/mL, 20°C)	0.92 - 0.96
Moisture (KF)	≤ 0.5%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.