3-Aminopropyltrimethoxysilane (APTMS) | Manta A111

Manta A111 is 3-aminopropyltrimethoxysilane (CAS 13822-56-5, 97–98% purity by GC, density 1.016 g/cm³) used as an adhesion promoter in RTV silicones, MS Polymer and SPUR hybrid sealants and as a primer for polyurethane systems. It is comparable to Silquest A-1110, Dynasylan AMMO and KBM-903, bonding difficult plastics such as ABS, PVC and polystyrene.

Manta A111 is a primary amino-functional silane containing three hydrolyzable methoxy groups. As a fundamental adhesion promoter and coupling agent, the primary amine group (-NH2) reacts rapidly with a wide array of organic polymers, while the methoxysilyl groups provide robust crosslinking and covalent bonding to inorganic substrates.

It is an indispensable compounding ingredient designed to dramatically enhance the adhesion of sealants, adhesives, and coatings to difficult-to-bond surfaces.

It is the exact chemical equivalent to industry standards such as Momentive Silquest A-1110, Evonik Dynasylan AMMO, and Shin-Etsu KBM-903.

As a fundamental adhesion promoter and coupling agent, the primary amine group (-NH2) reacts rapidly with a wide array of organic polymers, while the methoxysilyl groups provide robust crosslinking and covalent bonding to inorganic substrates.

It is an indispensable compounding ingredient designed to dramatically enhance the adhesion of sealants, adhesives, and coatings to difficult-to-bond surfaces.

It is the exact chemical equivalent to industry standards such as Momentive Silquest A-1110, Evonik Dynasylan AMMO, and Shin-Etsu KBM-903.

Manta A111 is widely utilized as a foundational adhesion promoter across various polymer matrices:

1. RTV Silicones & Hybrid Systems: Acts as a superior internal adhesion promoter in Room Temperature Vulcanizing (RTV) silicones, MS Polymers, and SPUR hybrid sealants.
2. Difficult Substrates: Delivers exceptional bonding strength to notoriously challenging plastics and polymers, including ABS, PVC, and Polystyrene, as well as glass and metals.
3. Primer Systems: Serves as a highly effective active component in the formulation of surface primers for polyurethane and hybrid sealant applications.
4. Resin Modification: Used to modify phenolic, melamine, and epoxy resins to improve moisture resistance and mechanical strength in composites.

Formulation & Handling Guidelines

• High Reactivity (CRITICAL): Because Manta A111 contains a highly reactive primary amine group, it reacts violently and instantly with isocyanates (-NCO) and epoxies. Do not add A111 directly into unreacted polyurethane prepolymers (one-part PU systems), as it will cause instant gelling. For one-part PU systems, secondary amines (like Manta A431) or latent silanes are required. A111 is best used in two-part systems or as a separate surface primer.
• Hydrolysis: Hydrolyzes rapidly in the presence of atmospheric moisture, releasing methanol. The resulting silanols will condense to form crosslinked siloxane networks.