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

SiSiB® PC2320

Synonym: 3-Methyldimethoxysilypropylmercaptan

Countertype of Dynasylan 3403, DowCorning AY43-062, ShinEtsu KBM-802

Chemical Structure


SiSiB® PC2320 is a bifunctional organosilane possessing a reactive organic mercapto and a hydrolyzable inorganic methoxysilyl group. SiSiB® PC2320 is a clear, colorless to light yellow liquid with a slightly mercaptan odor. It is soluble in alcohols, ketones and aliphatic or aromatic hydrocarbons.

Typical Physical Properties

Chemical Name: Mercaptopropylmethyldimethoxysilane
CAS No.: 31001-77-1
EINECS No.: 250-426-8
Empirical Formula: C6H16O2SSi
Molecular Weight: 180.34
Boiling Point: 96°C [30mmHg]
Flash Point: 93°C
Color and Appearance: Clear to straw liquid with unpleasant odor of sulfide.
Density [25°C]: 1.00
Refractive Index [25°C]: 1.4502[25°C]
Purity: Min.98.0% by GC


SiSiB® PC2320 can be used as coupling agent to improve the adhesion of sulfur cured elastomers (polysulfide, polyurethane sealants) to inorganic fillers (such as silica, clay, glass, mica and talc etc.), fiberglass and surfaces. Mineral-reinforced articles such as shoe soles, rubber rollers and wheels, white sidewalls, and wire and cable insulation also can be produced with lower silane loadings.

SiSiB® PC2320 can be used to improve properties of mineral filled elastomer, including modulus, tensile and tear strength, heat buildup, abrasion resistance, resilience, compression set and cure time.

SiSiB® PC2320 can be used as a pretreatment on minerals or added at the time of compounding.

SiSiB® PC2320 can be used to improve low-rolling resistance in silica-reinforced tire tread compounds.


Net weight 200Kg steel drum or 1000Kg IBC container, for more details, please visit Packing Centre.

Technical Library

Download Technical Data Sheet Safety Data Sheet 中文


Download SiSiB® SILANES & SILICONES 2014
Guide SiSiB® SILANE Selection Guide Guide SiSiB® SILANE Cross Reference Guide