Urethane Elastomers: Development of TDI-Free Replacement Materials for EN-7

摘要

TDI-free urethane elastomer formulations with excellent electrical properties have been developed as replacements for EN-7, a commercial TDI-based elastomer used for encapsulation in many weapon applications. TDI (toluene diisocyanate) is an OSHA-regulated volatile diisocyanate and has been targeted for elimination from future weapons use. As a result of this and earlier toxicity concerns, there have been efforts over many years within the DOE complex to identify urethane materials meeting the needed performance standards while minimizing health hazards during processing.