High Elongation MS Polymer MS3303H

Manta MS3303H is a high-elongation silyl-terminated polyether (MS polymer) with 50,000–60,000 mPa·s viscosity, medium modulus and high-activity alkoxy end groups, curing to ≥300% elongation at break and ≥1.95 MPa tensile strength. It is the base resin for transportation-grade sealants, medium-to-low modulus construction sealants, crystal-clear potting compounds and DIY adhesives — isocyanate-free, solvent-free and low-VOC.

Manta MS3303H is an alkoxy-silylated polyether polymer with a high-purity polyoxypropylene (PPO) backbone. Engineered for premium moisture-curing systems, M330A utilizes advanced silane-termination technology to ensure rapid cross-linking and a robust siloxane network upon exposure to humidity.

Designed as a superior alternative to traditional silicones and polyurethanes, MS3303H is entirely solvent-free, VOC-compliant, and contains no free isocyanates. It eliminates common curing defects such as bubbling and odor, delivering a flawless surface finish. Its exceptional versatility makes it the ideal binder for high-performance applications in Construction, Transportation, Industrial Assembly, and New Energy sectors.

Properties

• Accelerated Curing Profile: Optimized for fast tack-free times and through-cure, significantly improving production efficiency.
• Exceptional Optical Clarity: High transparency combined with superior resistance to UV aging and yellowing, perfect for crystal-clear bonding.
• Advanced Mechanical Balance: Delivers a high-strength bond while maintaining excellent tensile elasticity and recovery.
• Superior Environmental Profile: Solvent-free, odorless, and low-VOC; can be formulated with tin-free catalysts for eco-friendly compliance.
• Robust Stability: Exhibits excellent resistance to water, chemical solvents, and long-term storage stability.
• Universal Compatibility: Can be seamlessly blended with other Manta polymers or compatible resins to fine-tune mechanical properties and formulation costs.

MS3303H is used as a base/reactive polymer for moisture-curing sealants, adhesives, potting/encapsulation compounds, and coatings. It cures at room temperature by reacting with atmospheric moisture, typically with the aid of catalysts (e.g., amine- or tin-based catalyst systems), and can be formulated into 1K or 2K systems. Typical uses include:

Transportation Grade Sealants;

Medium-to-Low Modulus Construction Sealants;

Crystal Clear Potting & Encapsulation Adhesives;

Consumer & DIY Sealants;

Eco-friendly Interior Decoration Sealants;

Processing  

1. Moisture Sensitivity: As alkoxy groups undergo hydrolysis and cross-linking in the presence of humidity, it is critical to maintain a strictly moisture-free environment during storage and production to prevent premature gelation.
2. Formulation Flexibility: Manta MS3303Hoffers high formulation latitude. It is compatible with a wide range of functional fillers, including PCC, GCC, fumed silica, quartz flour, diatomaceous earth, and aluminum hydroxide.
3. Dehydration: To avoid premature curing, fillers must be thoroughly dehydrated. Vinyltrimethoxysilane (VTMO) is recommended as an effective water scavenger during the compounding process.
4. Plasticizer Selection: Compatible plasticizers include various phthalates (such as DINP, DIDP, or DOTP) and low-molecular-weight polyethers (PPG).
5. Performance Additives: For optimized performance, MS3303Hcan be formulated with adhesion promoters, antioxidants, biocides (fungicides), and light stabilizers. Compatible with tin-free catalysts for environmentally sensitive applications.

Typical Performance of a Reference Sample