Prepolymer compositions improved molding polyurea reaction injection.

摘要

A polyisocyanate composition consisting of a Produ REACTION OF EXCESSIVE stoichiometric a polyisocyanate ORGANICO Y: (i) a polymeric polyol having a functionality HYDROXY NOMINAL MEDIA OVER 2 AND EQUIVALENT AVERAGE WEIGHT HYDROXY between 500 and 5000 so, and (II) a polyamine polymeric Toene functionality AMINO PRIMARY AND / OR MEDIA NOMINAL SECONDARY between 2 and 3 APPROXIMATELY, and an equivalent weight average AMINA between 500 and 5000 APPROXIMATELY, BEARING polyol YLA polyamine temperatures TRANSITION VITREA BELOW AND THE PRODUCTION USEFUL IN TEMPERATURE ELASTOMEROS PROCESS FOR THE RIM (reaction injection MOLDING).