3-Isocyanatopropyltriethoxysilane | Manta S320

Manta S320 is γ-isocyanatopropyltriethoxysilane (CAS 24801-88-5, ≥96% purity) used as an end-capping agent for silane-modified polymers (SMP/SPUR), adhesion promoter, and crosslinker for hydroxyl-bearing resins in sealants, coatings and automotive glass primers. It releases ethanol instead of methanol on hydrolysis and is comparable to Momentive Silquest A-Link 25 and Shin-Etsu KBE-9007.

Manta S320 is an isocyanate-functional silane containing a hydrolyzable triethoxy group. Unlike traditional methoxy-silanes, Manta S320 undergoes hydrolysis to release ethanol rather than methanol, making it a significantly safer and more eco-friendly choice for formulators subject to stringent environmental and VOC regulations.

The highly active isocyanate functionality reacts rapidly with active hydrogen-containing compounds, while the silane portion enables moisture-cured crosslinking or robust adhesion to a variety of substrates.

It is the chemical equivalent to industry standards such as Momentive Silquest A-Link25, Shin-Etsu KBE-9007

Properties

1. Controlled Crosslinking: Reactive with -OH, -NH2, and -SH functional polymers, providing a highly reliable and slightly more controlled moisture-cure mechanism compared to methoxy variants.
2. Exceptional Adhesion: Acts as a powerful adhesion promoter, providing superior wet and dry bond strength to difficult inorganic substrates (glass, metal, ceramics).
3. Durable Bonds: The resulting siloxane bonds deliver outstanding thermal, chemical, and UV stability.

Manta S320 is widely utilized as a crosslinker, end-capper, and adhesion promoter:

1. Polymer Modification (SMP/SPUR): Functions as the critical, low-toxicity end-capping agent for diols or polyol polymers to manufacture Silane-Modified Polymers (MS Polymer) and SPUR systems.
2. Adhesion Promoter:Extensively used in silicone sealants, polyurethane paints, and hybrid adhesives requiring enhanced adhesion to organic plastics (like nylon) or inorganic substrates presenting active hydrogen species.
3. Resin Crosslinking:Serves as a highly efficient modifier for hydroxyl-bearing resins (such as acrylic resins, PVA) and alkoxy-silyl crosslinked fluororesin fluids, significantly improving weatherability and chemical resistance.
4. Reactive Additive:Enhances the performance and durability of one-part moisture-curable and two-part reactive polyurethane systems.
5. Eco-Friendly Automotive Glass Primers (AGR):Functions as the premier low-toxicity adhesion promoter in advanced polyurethane primers for Automotive Glass Replacement (AGR), delivering secure and durable adhesion to glass while ensuring environmental compliance by releasing ethanol.