3-Mercaptopropyltrimethoxysilane | Manta S31

Manta S31 is a bifunctional organosilane with a reactive mercapto (-SH) group and three hydrolyzable methoxysilyl groups. Its sulfur-based chemistry lets it act as a coupling agent between sulfur-vulcanized rubbers or reactive resins and inorganic fillers or substrates.

In silica-reinforced tire treads, S31 chemically bonds silica to SBR and BR polymers, reducing rolling resistance while improving wet grip and tread wear resistance. The mercapto group can also participate in radical polymerization or react with isocyanates and epoxies, and S31 improves the moisture and corrosion resistance of sealants and coatings.

S31 differs from amino-functional grades such as Manta A111 and epoxy-functional grades such as Manta E560 in its functional group. The mercapto group is the reason for its use with non-ferrous metals and in rubber compounds that couple silica to organic polymers.

• Rubber: silica-reinforced tire tread compounds and mineral-reinforced goods such as shoe soles, industrial rollers and mechanical rubber parts
• Polysulfide and polyurethane sealants: internal adhesion promoter for water-resistant bonding to glass and metals, including insulating glass sealants, automotive windshield adhesives and architectural joint sealants
• Protective coatings and metal primers: additive or primer improving the adhesion of epoxy and polyurethane coatings to copper, silver, gold, aluminum and stainless steel, helping to limit sub-film corrosion and substrate oxidation
• Electronics and copper foil: surface treatment of copper foils and silver-based conductive inks for peel strength and reliability in flexible printed circuits and laminates
• Resin modification and composites: chemical modification of butyl, neoprene, nitrile, SBR, epoxy, phenolic and polyurethane systems, and coupling agent in silica-, talc- or mica-filled composites
• Foundry and abrasives: additive to phenolic and furan resins for sand core strength and moisture resistance, and strengthens the bond between abrasive grains and resin binder
• Precision metal surfaces: thin-film surface modifier providing a hydrophobic, anti-corrosive layer that facilitates subsequent bonding

Supplied in 20 kg pail, 190 kg drum, 200 kg drum.