POLYURETHANE IONOMERS AND METHODS FOR THEIR PREPARATION AND FORMATION

摘要

The invention relates to improved polyurethane ionomers and methods for maki ng the same. It was found that the polyurethane anionomers obtained by using th e method of the invention had improved physical properties than those made by conventional methods. For example, the polyurethane ionomers produced by the method of the invention exhibit a plateau in the plot of elasticity modulus (as log10E') vs. temperature over a useful and relatively broad temperature and frequency range. The polyurethane ionomers have nearly temperature- independent elasticity over a 50~C range in the region of ~ -20 to +75~C. Another advantage is that the polyurethane ionomers of the invention are optically clearer than the conventionally prepared polyurethane ionomers. A further advantage of the invention is that the synthetic process of making t he polyurethane ionomers is much faster than the known process for equivalent compositions. Additionally, striking tensile strength properties were observ ed for the polyurethane ionomers.