Description

3-(Diethoxysilyl)Propyl Isocyanate is a bifunctional organosilane coupling agent featuring both a reactive isocyanate group and hydrolyzable ethoxysilane groups. This unique structure makes it a critical intermediate for creating covalent bonds between inorganic substrates and organic polymers, enhancing adhesion, durability, and mechanical properties. It is essential for manufacturers in the advanced materials, coatings, and adhesive industries seeking to improve the performance and longevity of their composite products.

Application

• Surface Modification Agent: Used to functionalize glass, silica, metals, and other inorganic fillers to improve compatibility and dispersion in polymer matrices like polyurethanes and epoxies.
• Adhesive & Sealant Formulations: Acts as an adhesion promoter in high-performance polyurethane and silicone-based adhesives and sealants, particularly for challenging substrates.
• Hybrid Material Synthesis: Serves as a key monomer for synthesizing silane-terminated polymers (STPs) and other organic-inorganic hybrid (OIH) materials with tailored properties.
• Coatings & Paints: Incorporated into coating systems to enhance corrosion resistance, scratch resistance, and adhesion to metal and glass surfaces.
• Fiber Treatment: Applied as a sizing or finishing agent for glass and carbon fibers to strengthen the fiber-matrix interface in composite materials.
• Crosslinking Agent: Utilized to introduce crosslinks into polymer chains, improving thermal stability and chemical resistance of the final material.

Basic Information

Product Name	3-(Diethoxysilyl)Propyl Isocyanate
CAS No.	33491-28-0
Molecular Formula	C10H21NO4Si
Molecular Weight	247.36 g/mol
Synonyms	3-Isocyanatopropyltriethoxysilane; Triethoxy(3-isocyanatopropyl)silane; Isocyanatopropyltriethoxysilane; (3-Isocyanatopropyl)triethoxysilane; Silane, triethoxy(3-isocyanatopropyl)-; ICPS; 3-Triethoxysilylpropyl isocyanate; γ-Isocyanatopropyltriethoxysilane
EINECS	251-523-5

Quality Control

Our 3-(Diethoxysilyl)Propyl Isocyanate is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing to ensure high purity, consistency, and compliance with relevant industry standards. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment and is available upon request.

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 or argon) to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (GC or Titration)	≥ 97.0%
Density (at 20°C)	~1.00 g/cm³
Refractive Index (n20/D)	~1.420

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