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

Shin-Etsu KBM-803 Silane Coupling Agent

Shin-Etsu KBM-803 (3-mercaptopropyltrimethoxysilane) is a thiol-functional silane coupling agent that bridges organic polymers and inorganic substrates via reactive mercapto and methoxy groups. It enhances adhesion, reduces viscosity, and improves mechanical/chemical resistance in coatings, adhesives, and composites. Compatible with elastomers and epoxy resins, it is widely used in rubber compounding and electronic encapsulation, offering fast curing at ambient temperatures and compliance with REACH/RoHS standards

  • shin etsu kbm 803
  • shin etsu kbm 803

Features Of Shin-Etsu KBM-803 Silane Coupling Agent

  1. Dual Reactivity - Mercapto bonds with polymers; methoxy links to metals/glass

  2. Viscosity Control - Low viscosity (1.057 g/cm³) for easy processing

  3. Durability Enhancement - Improves UV/chemical resistance and mechanical strength

  4. Multi-Matrix Compatibility - Effective with epoxy, polyurethane, and rubber

  5. Eco-Friendly - Halogen-free, suitable for waterborne systems

Typical Applications Of Shin-Etsu KBM-803 Silane Coupling Agent

  1. Rubber Industry - Enhances耐磨性 in tires and seals (NR, EPDM, SBR)

  2. Electronic Encapsulation - Moisture-resistant protection for PCBs

  3. Adhesive Formulations - Boosts bonding strength in structural adhesives

  4. Composite Interfaces - Glass fiber treatment for FRP reinforcement

Specifications Of Shin-Etsu KBM-803 Silane Coupling Agent

Chemical Name
3-Mercaptopropyltrimethoxysilane
Appearance
Colorless to light yellow transparent liquid
Active Content
≥98%
Viscosity
Low viscosity
Density (20℃)
1.07 g/ml
Refractive Index (25℃)
1.427
Boiling Point
290℃
Flash Point
149℃
Packaging
190KG/drum


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