Transparent Silane Terminated Polyether MS3303T

Manta MS3303T is a crystal-clear, high-activity silyl-terminated polyether (MS polymer) with 40,000–50,000 mPa·s viscosity and medium modulus. It is the base resin for optically clear sealants and adhesives, glass assembly and decorative bonding, electronic potting and fast-assembly industrial bonding — 100% solvent-free, low-VOC and free of isocyanates.

Manta MS3303T is an alkoxy-terminated polyether polymer with a polyoxypropylene backbone. It is specifically engineered as a base resin for moisture-curing systems, forming a resilient elastic network through the hydrolysis and cross-linking of alkoxy groups in ambient humidity.

Compared to traditional silicone and polyurethane technologies, MS3303T provides a superior balance of mechanical properties and environmental safety. It is a 100% solvent-free, low-VOC resin that contains no free isocyanates, ensuring a safe and eco-friendly formulation.

Properties

• Fast Curing: Accelerated curing profile for increased productivity.
• High Transparency: Crystal clear appearance for optical-grade applications.
• Excellent Weathering & Yellowing Resistance: Long-term UV stability and anti-yellowing performance.
• Superior Adhesion & Elasticity: High bond strength combined with excellent tensile elongation.
• Excellent Water & Chemical Resistance: Highly resistant to moisture and various chemical solvents.
• Superior Storage Stability: Long shelf life and consistent viscosity over time.
• Eco-Friendly: Solvent-free and odorless, ensuring a safe working environment.
• Broad Compatibility: Can be seamlessly blended with other polymers for formulation flexibility.

Manta MS3303T is a versatile base resin designed for the formulation of high-performance adhesives, sealants, potting compounds, and protective coatings. It features a flexible curing mechanism, triggered by atmospheric moisture at room temperature in the presence of catalysts (such as amines or organotin compounds):

1. Optically Clear Sealants & Adhesives: Due to its high transparency and anti-yellowing properties, it is ideal for “crystal clear” sealants used in glass assembly, decorative bonding, and visible joints.
2. Fast-Assembly Industrial Bonding: Optimized for production lines requiring rapid curing and high initial green strength. It is suitable for both one-component (1K) systems for ease of use and two-component (2K) systems for deep-section curing.
3. Electronic Potting & Encapsulation: Provides excellent moisture protection and chemical resistance for sensitive electronic components, ensuring long-term storage stability and reliability.
4. Transportation & Automotive: Used in the structural bonding and sealing of vehicle components where high elasticity and resistance to environmental aging are critical.
5. High-End Construction: Applicable for elastic sealing in curtain walls, window perimeters, and interior decoration, offering a paintable, solvent-free, and odorless finish.

Processing

1. Moisture Sensitivity: Due to the moisture-curing nature of alkoxy groups, it is critical to maintain a strictly dehydrated environment during storage and production to prevent premature cross-linking.
2. Formulation Versatility: The dosage of MS3303T can be adjusted based on specific requirements. It is highly compatible with a wide range of fillers, including PCC (Nano-precipitated Calcium Carbonate), GCC (Ground Calcium Carbonate), Fumed Silica (White Carbon Black), silica flour, diatomaceous earth, and aluminum hydroxide.
3. Dehydration Process: To avoid premature gelation, all fillers must be thoroughly dehydrated. Silane VTMO is typically recommended as a high-efficiency moisture scavenger.
4. Plasticizer Compatibility: Suitable plasticizers include Phthalates (such as DOP, DINP, DIDP), as well as PPG and other low-molecular-weight polyethers.
5. Functional Additives: For enhanced performance, MS3303T can be blended with various additives, including adhesion promoters (tackifiers), antioxidants, fungicides (mildew inhibitors), and UV/Light stabilizers.