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

Momentive A-1891 Silane Coupling Agent

Momentive A-1891 (γ-mercaptopropyltrimethoxysilane) is a bifunctional coupling agent that enhances adhesion between organic polymers (e.g., acrylics, EPDM) and inorganic substrates (e.g., silica, metals) via mercapto and methoxy groups. It improves mechanical strength, chemical resistance, and filler dispersion in rubber, coatings, and composites. Compatible with radical polymerization systems, it enables rapid curing at ambient temperatures while complying with REACH standards

Features Of Momentive A-1891 Silane Coupling Agent

  1. Dual Reactivity - Mercapto bonds with resins; methoxy links to fillers/metals

  2. Dynamic Performance - Enhances modulus, abrasion resistance, and wet strength retention (>90%)

  3. Process Efficiency - Low viscosity (1.045 g/cm³) for easy filler dispersion

  4. Multi-Matrix Compatibility - Works with polyesters, epoxies, and elastomers

  5. Sustainability - Halogen-free, reduces VOC emissions in formulations

Typical Applications Of Momentive A-1891 Silane Coupling Agent

  1. Tire Tread Compounds - Silica reinforcement for low rolling resistance

  2. Industrial Rubber - Seals, hoses with improved wear resistance

  3. Anti-Corrosion Coatings - Enhanced metal adhesion and chemical resistance

  4. FRP Composites - Glass fiber sizing for high-strength structures

Specifications Of Momentive A-1891 Silane Coupling Agent

Chemical Name
γ-Mercaptopropyltrimethoxysilane
Appearance
Colorless to light yellow transparent liquid
Molecular Weight
248.4 g/mole
Specific Gravity (25/25℃)
1.033
Boiling Point (760mmHg)
255℃
Flash Point (Sealed Cup)
108℃
Solubility
Soluble in methanol, ethanol, acetone, etc., and hydrolyzed in pH=4 water
Packaging
25KG/drum
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