| 摘要 |
<p>In continuous mfr., by kneading and extrusion, of a pyrotechnical charge comprising mainly a cross-linkable silicone binder and an oxidant consisting mainly of (NH4)ClO4 or NaNO3, and charging the mixt. continuously into a press equipped at the outlet with an extrusion head, the uncross-linked binder contains: (i) a silicone resin with mol. wt. below 20,000, cross-linkable by hydrogen-silane gps.; (ii) a silicone gum with a mol. wt. above 100,000, cross-linkable by hydrogeno-silane gps.; and (iii) a hydrogeno-polysiloxane as cross-linking agent. A uniform paste is obtd. by extrusion at not above 30 degrees C, in the form of threads of stable geometry, which are cut to the length of the charge and cross-linked at above 30 degrees C.</p> |
