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According to reports, both prepolymers have good adhesive properties, sealing properties, and good flexibility. One of the sealants has good elastic recovery and the other is a flexible tissue adhesive. The silane-terminated polyurethane pre-polymerized material has both high strength and flexibility, and has a reliable adhesion to many matrix materials compared to silicone sealants without the need for primers and long service life. Good compatibility, stable storage.
Silane-terminated sealant XP2447 still has good elastic recovery force after 70% loading, which is difficult for common polyurethane materials, and XP2448 has high elongation at break and high modulus, and can be used in automobiles, ships, etc. Exhaust pipes and air conditioners.
The company also offers amino-terminated trifunctional materials that have high reactivity and fast curing speeds.
Bayer's new PU prepolymer
Bayer Polymers AG introduced two new silane-terminated polyurethane prepolymers.