Alpha Silane-Terminated Polymer | Manta MS310A

Manta MS310A is a dimethoxy(methyl)silylmethylcarbamate-terminated polyether (CAS 611222-18-5, viscosity 7000-10000 mPa·s at 25°C) used as a fast-curing binder for moisture-curing sealants, elastic adhesives and electronic potting compounds. Its alpha-silane structure accelerates hydrolysis so formulations cure rapidly without organotin catalysts, enabling tin-free and phthalate-free systems.

Manta MS310A is a silane-terminated polyether (STPE) polymer featuring a dimethoxy(methyl)silyl-methylcarbamate terminal group. This unique molecular structure leverages the “Alpha-Effect”—where the proximity of the nitrogen atom to the silicon center significantly accelerates the hydrolysis of alkoxysilyl groups upon exposure to ambient moisture.

Built on a high-purity Polypropylene Oxide (PPO) backbone, MS310A cures to form a stable, high-performance siloxane network. It is designed for formulators seeking a rapid-curing binder that eliminates the need for organotin catalysts, providing a safer and more sustainable solution for premium adhesives and sealants.

Properties

• Superior Reactivity (Alpha-Effect): Enables rapid tack-free times and fast through-cure without heavy metal catalysis.
• Tin-Free & Eco-Friendly: Allows for the formulation of non-toxic, tin-free, and phthalate-free systems, meeting the highest environmental standards.
• Exceptional Optical Clarity: Perfectly suited for crystal-clear sealants and transparent bonding applications.
• Enhanced Weathering Resistance: Outstanding resistance to UV aging and yellowing, ensuring long-term aesthetic and structural integrity.
• Processing Efficiency: Low base viscosity ensures easy compounding with conventional fillers and auxiliaries.
• Wide Temperature Stability: The low glass transition temperature (Tg) ensures the cured material remains flexible and mechanically stable across a broad temperature range.

Manta MS310A unique molecular structure leverages the “Alpha-Effect”—where the proximity of the nitrogen atom to the silicon center significantly accelerates the hydrolysis of alkoxysilyl groups upon exposure to ambient moisture.

Built on a high-purity Polypropylene Oxide (PPO) backbone, MS310A cures to form a stable, high-performance siloxane network. It is designed for formulators seeking a rapid-curing binder that eliminates the need for organotin catalysts, providing a safer and more sustainable solution for premium adhesives and sealants.

1. High-Performance Sealants: Ideal for construction and industrial sealants where rapid curing and over-paintability are required.
2. Elastic Adhesives: Used as a primary binder for assembly adhesives in automotive, rail, and structural engineering.
3. Electronic Potting & Encapsulation: Provides excellent protection for sensitive electronic components due to its stable mechanical properties and moisture resistance.
4. Coatings & Additives: Acts as a reactive binder or functional additive in high-durability coatings to improve adhesion and cross-linking density.
5. DIY & Professional Bonding: Exceptional primerless adhesion to a wide variety of substrates, including metals, plastics, and ceramics.

Processing

1. Moisture Sensitivity: Manta MS310A is highly reactive to moisture. To ensure product stability and prevent premature gelation, it is critical to maintain a moisture-free environment throughout storage, handling, and production.
2. Filler Compatibility: This polymer offers high formulation flexibility and can be compounded with a wide range of fillers, including PCC (Precipitated Calcium Carbonate), GCC (Ground Calcium Carbonate), fumed silica, quartz flour, diatomaceous earth, and aluminum hydroxide.
3. Dehydration & Scavenging: > All fillers must be thoroughly dehydrated before incorporation. Vinyltrimethoxysilane (VTMO) is recommended as a highly efficient water scavenger to neutralize residual moisture in the system.
4. Plasticizer Selection: Manta MS310A is compatible with various plasticizers, such as phthalates (DINP, DIDP, DOTP) and low molecular weight polyethers (PPG). It also enables the development of phthalate-free or plasticizer-free formulations for high-end applications.
5. Functional Additives: To enhance specific performance characteristics, the addition of adhesion promoters, antioxidants, biocides (fungicides), and light stabilizers is recommended.