Description

n-3-(Triethoxysilylpropyl)-n-3-(Trimethoxysilyl-Propyl)Urea is a specialized bifunctional organosilane coupling agent containing both triethoxysilyl and trimethoxysilyl groups linked by a urea bridge. This unique molecular structure provides dual reactivity, making it an exceptional crosslinker and adhesion promoter for enhancing the compatibility between organic polymers and inorganic substrates. It is primarily needed by formulators and manufacturers in the adhesives, sealants, coatings, and advanced composite materials industries seeking to improve mechanical properties and environmental durability.

Application

• Adhesion Promoter: Enhances bond strength and durability in silicone, polyurethane, and epoxy-based adhesives and sealants, particularly on glass, metal, and mineral surfaces.
• Crosslinking Agent: Functions as a key component in moisture-curable polymer systems (e.g., RTV silicones, MS polymers) to improve tensile strength, elasticity, and chemical resistance.
• Surface Modification: Used to treat fillers (silica, glass fibers, minerals) and pigments to improve dispersion and interfacial adhesion within polymer matrices.
• Composite Materials: Improves the mechanical performance and moisture resistance of fiber-reinforced plastics (FRP) and mineral-filled composites.
• Protective Coatings: Incorporated into primers and topcoats to enhance corrosion protection, scratch resistance, and adhesion to difficult substrates.
• Rubber Compounding: Acts as a coupling agent in silica-filled tire tread and technical rubber goods to reduce rolling resistance and improve wear.

Basic Information

Item	Detail
Product Name	n-3-(Triethoxysilylpropyl)-n-3-(Trimethoxysilyl-Propyl)Urea
CAS No.	24858-52-4
Molecular Formula	C17H40N2O8Si2
Molecular Weight	468.7 g/mol
Synonyms	Urea, N-[3-(triethoxysilyl)propyl]-N'-[3-(trimethoxysilyl)propyl]-; Bis(3-triethoxysilylpropyl)urea (mixed alkoxy variant); Ureido silane coupling agent; γ-Ureidopropyltriethoxysilane / γ-Ureidopropyltrimethoxysilane adduct; Silane A-1160 (related trade name); Dual alkoxy ureido silane; Adhesion promoter 24858-52-4
EINECS	Contact for details

Quality Control

Our production of n-3-(Triethoxysilylpropyl)-n-3-(Trimethoxysilyl-Propyl)Urea adheres to a strict quality management system. Every batch undergoes rigorous analytical testing to ensure consistent purity, reactivity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, alkoxy content, and moisture are available upon request to support your quality assurance and regulatory needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive). Keep the container tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent hydrolysis and maintain shelf life.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC/NMR)	≥ 95.0%
Density (at 20°C)	~1.05 g/cm³
Refractive Index (n20D)	~1.420
Moisture (Karl Fischer)	≤ 0.5%

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