Description

3-Isocyanatopropyldimethylchlorosilane is a highly reactive bifunctional organosilicon compound that serves as a critical coupling agent and surface modifier. Its dual functionality allows it to bridge organic polymers with inorganic substrates, creating durable, high-performance interfaces. This chemical is essential for manufacturers in the silicone, adhesive, and advanced materials sectors seeking to enhance composite material properties and adhesion.

Application

• Surface Modification Agent: Primarily used to functionalize silica, glass, and metal oxide surfaces, introducing reactive isocyanate groups for further polymer grafting.
• Adhesive & Sealant Formulation: Acts as a key adhesion promoter in polyurethane and silicone-based adhesives and sealants, improving bond strength to difficult substrates.
• Polymer Crosslinking: Serves as a crosslinker or chain extender in specialty polymer synthesis, particularly for modifying silicone elastomers.
• Composite Material Manufacturing: Enhances the interfacial compatibility between organic polymer matrices and inorganic fillers (e.g., glass fibers, minerals) in advanced composites.
• Chemical Intermediate: Used in the synthesis of more complex silane coupling agents and specialty organosilicon compounds for research and development.
• Waterproofing & Coatings: Incorporated into coatings formulations to improve water repellency, corrosion resistance, and durability on various surfaces.

Basic Information

Product Name	3-Isocyanatopropyldimethylchlorosilane
CAS No.	17070-70-1
Molecular Formula	C6H12ClNOSi
Molecular Weight	177.71 g/mol
Synonyms	Dimethylchloro(3-isocyanatopropyl)silane; (3-Isocyanatopropyl)dimethylchlorosilane; γ-Isocyanatopropyldimethylchlorosilane; 1-Dimethylchlorosilyl-3-isocyanatopropane; 3-Isocyanato-1-propyldimethylchlorosilane; Isocyanatopropyldimethylchlorosilane; Silane, dimethylchloro(3-isocyanatopropyl)-
EINECS	241-144-8

Quality Control

Our production of 3-Isocyanatopropyldimethylchlorosilane adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. Each lot is analyzed using advanced techniques including GC, FT-IR, and titration to verify critical parameters such as assay, isocyanate content, and chlorosilane content. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at temperatures between 2°C and 8°C (refrigerated) to minimize hydrolysis and polymerization. Due to its highly volatile and moisture-sensitive nature, containers must be kept tightly sealed under a dry inert atmosphere (nitrogen or argon) after opening. Keep away from heat, sparks, open flames, and incompatible materials such as water, alcohols, amines, and strong bases.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (GC)	≥ 97.0%
Isocyanate Content	≥ 23.0 % (by titration)
Chlorosilane Content	≥ 19.5 % (by titration)
Density (at 25°C)	1.00 - 1.05 g/mL
Refractive Index (n20D)	1.440 - 1.450

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