Niax™ Silicone L-5440

Niax™ silicone L-5440 by Momentive Performance Materials is a non-hydrolyzable silicone surfactant which may be an excellent candidate for use in difficult-to stabilize rigid foam formulations, such as those having very low reactivities. Also acts as wetting agent. It helps effectively in maintaining the compatibility of the foaming ingredients before the onset of the reaction. This results in increased fluorocarbon efficiency, i.e., density reduction, and the formation of fine, uniform, closed cells, i.e., lower k-factors. In addition, it may be an effective stabilizer for rigid foam formulations incorporating reduced levels of auxiliary blowing agent, for example, high-water/reduced-CFC systems. The foams contained a narrow distribution of small, fine, closed cells that contribute to excellent k-factor performance. Niax™ silicone L-5440 may also be suitable for HCFC-141b systems with excellent dimensional stability and compressive strength. Can be used with excellent results in such formulations as refrigeration, pour-in-place, boardstock or froth. It can also be used in other formulations where polyol-soluble product is desired and should be evaluated in any formulation where standard surfactants are inadequate.