Description

3-Isocyanatopropyltrimethoxysilane is a versatile organofunctional silane coupling agent that combines the reactivity of an isocyanate group with the hydrolyzable methoxysilane functionality. This dual reactivity makes it a critical component for creating strong, durable bonds between inorganic substrates and organic polymers. It is essential for manufacturers in the coatings, adhesives, sealants, and elastomers (CASE) industries, as well as for advanced composite materials, where enhanced adhesion, moisture resistance, and mechanical properties are required.

Application

• Adhesion Promoter: Primarily used to improve the adhesion of polyurethane, epoxy, and acrylic-based coatings, adhesives, and sealants to glass, metals, and mineral surfaces.
• Surface Modification: Functionalizes silica, glass fibers, and other inorganic fillers to improve their compatibility and dispersion within polymer matrices for reinforced composites.
• Crosslinking Agent: Serves as a moisture-curable crosslinker in silicone-modified organic polymers, enhancing weatherability and durability in sealants and coatings.
• Primers and Sizing: A key ingredient in glass fiber sizing formulations and corrosion-resistant primers for automotive and aerospace applications.
• Rubber and Tire Industry: Used to modify silicas and silicates in tire tread compounds to reduce rolling resistance and improve wet grip.
• Waterproofing Agents: Incorporated into formulations for construction materials to provide long-lasting water repellency.

Basic Information

Product Name	3-Isocyanatopropyltrimethoxysilane
CAS No.	15396-00-6
Molecular Formula	C7H15NO4Si
Molecular Weight	205.28 g/mol
Synonyms	3-(Trimethoxysilyl)propyl isocyanate; Isocyanatopropyltrimethoxysilane; Trimethoxysilylpropyl isocyanate; γ-Isocyanatopropyltrimethoxysilane; Silane A-Link 35; Dynasylan 1194; KBE-9007; SIB 1400.0
EINECS	239-411-7

Quality Control

Our 3-Isocyanatopropyltrimethoxysilane is manufactured under strict quality management systems. Every batch undergoes rigorous analytical testing, including assay by titration and impurity profiling, to ensure it meets precise specifications for isocyanate content and purity. A Certificate of Analysis (COA) detailing all relevant parameters is provided with each shipment to guarantee consistency and performance for your critical applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at temperatures between 15-25°C (59-77°F). This product is highly volatile and hygroscopic (moisture-sensitive). Containers must be kept tightly sealed under a dry inert atmosphere (e.g., nitrogen) to prevent moisture absorption and polymerization. Keep away from heat, sparks, and open flame.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (Isocyanate Content)	≥ 97.0 %
Purity (GC)	≥ 98.0 %
Density (at 20°C)	1.06 - 1.08 g/cm³
Refractive Index (n20D)	1.420 - 1.425
Water Content (Karl Fischer)	≤ 0.1 %

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