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.
Siwin-S31
Siwin
Siwin-S31
4420-74-0
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Siwin-S31
Mercaptopropyltrimethoxysilane
Typical properties
Product No. | Siwin-S31 |
Chemical Name | 3-Mercaptopropyltrimethoxysilane |
CAS NO. | 4420-74-0 |
EINECS NO. | 224-588-5 |
Formula | C6H16O3SSi |
Appearance | Colorless Liquid |
Density (ρ20℃，g/m³) | 1.057 |
Refractive Index | 1.444 |
Purity | 98% |
M.W | 196.34 |
Flash Point | 204 °F |
Molecular Structure |
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Application
Rubber and Plastics Industry
Acts as a crosslinking promoter in natural rubber, styrene-butadiene rubber (SBR), polyurethane, and other systems, significantly improving wear resistance, tear resistance, and mechanical properties.
Modifies inorganic fillers (e.g., silica, carbon black, glass fibers) via reactions between mercapto (-SH) groups and filler surfaces, enhancing compatibility with rubber matrices, reducing permanent deformation, and improving reinforcement effects.
Composites and Surface Treatment
Used for interface modification of glass fiber/resin composites. Combines with glass fibers via silanol groups and crosslinks with resins through mercapto groups, enhancing mechanical strength and moisture resistance of laminated products.
Modifies inorganic materials (e.g., attapulgite, silica gel) to impart adsorption capabilities or catalytic activity, expanding applications in environmental protection and chemical industries.
Metal Surface Protection and Bonding
Treats surfaces of gold, silver, copper, and other metals to form chemically bonded anti-corrosion layers, significantly improving oxidation and corrosion resistance while enhancing adhesion to polymers.
Serves as a coupling agent at metal-rubber/plastic interfaces, improving long-term stability of composite structures in automotive parts and electronic components.
Polymer Bonding and Sealing
Functions as a coupling agent in epoxy and polyurethane adhesives, enhancing adhesion and water resistance to substrates like glass and concrete, suitable for construction sealants and structural adhesives.
Acts as a vulcanization aid in silicone rubber products, optimizing room-temperature curing efficiency and improving elastic recovery of sealing materials.
Specialized Fields
Used in textiles for anti-shrinkage finishing and dye fixation, enhancing wash resistance.
Prepares silicone gels or modified silicone oils for high-performance applications in electronic potting and medical devices.
Package & Storage
210L Iron Drum: 200kg/drum.
1000L IBC Container: 950kg/container.
Store tightly at room temperature in dry shadow place, avoid contact with alkali and acid , away from fire source.
