Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Momentive SILQUEST E-FREE 189 Silane Coupling Agent

Momentive SILQUEST E-FREE 189 (3-mercaptopropyltrimethoxysilane) is an eco-friendly mercapto silane coupling agent designed to optimize filler dispersion and interfacial bonding in rubber and composites. It enhances mechanical strength, abrasion resistance, and wet electrical properties while reducing VOC emissions. Ideal for tire and cable applications, it enables rapid curing at ambient temperatures and complies with REACH standards, offering cost-efficient processing

Features Of Momentive SILQUEST E-FREE 189 Silane Coupling Agent

  1. Dual-Function Design - Mercapto bonds with polymers; methoxy links to silica/fillers

  2. Process Efficiency - Lowers viscosity (1.057 g/mL) for seamless filler integration .

  3. Dynamic Performance - Improves rolling resistance in tires and wet adhesion (>90%)

  4. Sustainability - Halogen-free, ethanol emission-reducing formulation

Typical Applications Of Momentive SILQUEST E-FREE 189 Silane Coupling Agent

  1. Green Tire Manufacturing - Silica reinforcement for low rolling resistance

  2. High-Performance Rubber - Shoe soles/hoses with enhanced heat resilience

  3. Cable Insulation - Crosslinked polyethylene for dielectric stability

  4. Anti-Corrosion Coatings - Metal adhesion with chemical resistance

Specifications Of Momentive SILQUEST E-FREE 189 Silane Coupling Agent

Chemical Name3-Mercaptopropyltrimethoxysilane
CAS No.4420-74-0
Density (25°C)1.057 g/mL
Flash Point88°C
Purity≥97%


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