3-Trimethoxysilylpropylurea

Product Overview

3-Trimethoxysilylpropylurea (CAS 23843-64-3) is a specialized ureido-functional silane coupling agent engineered for superior interfacial adhesion in composite and coating systems. Unlike conventional aminosilanes, it offers enhanced stability in reactive polymer matrices—such as epoxy, phenolic, urea-melamine, and polyurethane—while maintaining color neutrality over time. Its unique molecular structure delivers nitrogen-based reactivity without the strong alkalinity typically associated with amine-functional silanes, making it ideal for sensitive formulations.

Key Advantages

• Exceptional long-term thermal and hydrolytic stability in polymer composites
• No yellowing or discoloration during aging or elevated-temperature processing
• Improves bonding between glass fibers, mineral fillers, metals, and organic resins
• Compatible with a wide range of industrial resin systems

Specifications

Industrial Applications

This advanced silane is widely used as a performance-enhancing additive in:

• Glass fiber sizing and finishing formulations
• Wool insulation binders based on thermoset resins
• Foundry sand core binders for metal casting
• High-performance adhesives and sealants requiring durable metal-to-polymer adhesion
• Abrasive grinding wheel binders where filler-resin compatibility is critical
• Primer systems for automotive and construction coatings

Storage: Keep in a cool, dry, and well-ventilated area in tightly sealed containers to prevent moisture exposure. Standard packaging is 220 kg per drum, with custom options available upon request.