关键词: 异氰酸酯;复合推进剂;涂料;固体火箭推进剂;推进剂固化剂;述评

Abstract: The preparation method and properties of dimeryl diisocyanate (DDI) and its apptication for military and civil purposes are described in this paper. DDI is characterized by lower toxicibility, low vapor pressure, and insensibility to moisture,so its preparation of DDI is simpler and easier than that of IPDI (Isophoro-ne dissocyanate) and harmless to persons. The propellant containing DDI possess the long pot time of slurry, high mechanical properties at low temperature and low burning rate pressure exponents (compared with IPDI). In the com mercial applications, tne polyurea coatings and the elastomers with DDI have the advantages of all weather operation, waterproof and aging resistance.

Key words: Isocyanate;Composite propellant;Solid rocket propellant;Curing agent of propellant;Coating