Silane Coupling Agents | Mercapto Silanes | Sulfur Silanes | Surface Modifiers

SiSiB® PC2300

Synonym: 3-Trimethoxysilypropylmercaptan

Countertype of Dynasylan MTMO, VPSi163, DowCorning Z-6062, ShinEtsu KBM-803, Wacker GENIOSIL GF 70, Silquest A-189

Chemical Structure


SiSiB® PC2300 is a mercapto-functional silane that finds use as a coupling agent in polysulfide and polyurethane caulks and sealants. It is especially useful in sulfur-cured and metal oxide-cured elastomers. Chemically bonding reinforcing minerals like silica, clay, mica and talc to the polymer matrix, properties including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time are improved in mineral-filled elastomers. It can be used as a pretreatment on minerals or added at the time of compounding. Being a rather efficient and fast sulfur containing silane, typically lower silane loading levels are used.

Typical Physical Properties

Chemical Name: 3-Mercaptopropyltrimethoxysilane
CAS No.: 4420-74-0
EINECS No.: 224-588-5
Empirical Formula: C6H16O3Si
Molecular Weight: 196.4
Boiling Point: 212°C [760mmHg]
Flash Point: 88°C
Color and Appearance: Water white to light straw liquid clear liquid
Density [25°C]: 1.057
Refractive Index [25°C]: 1.440
Purity: Min.97.0% by GC


Improves the adhesion of polysulfide and polyurethane sealants to glass and metal surfaces.
Improves low-rolling resistance in silica-reinforced tire tread compounds.
Enhances properties in mineral-reinforced articles such as shoe soles, rubber goods.

Suitable for use in polymer such as Butyl | Epoxy | Neoprene | Nitrile | Phenolic | Polysulfide | Polyurethane | Styreue Butadiene.


Net weight 210L steel drum or 1000L IBC container, for more details, please visit Packing Centre.

Technical Library

Download Technical Data Sheet Safety Data Sheet


Download 2010 SiSiB® SILANE Catalogue