| 摘要 |
PURPOSE:To improve the sliver combustion or the like of the propellant by a method wherein a specified weight ratio of one kind or more of nickel group substance e.g. metallic nickel powder, inorganic nickel compound or nickel set of organic acid are blended into the coating layer of the double base propellant for a rocket motor. CONSTITUTION:A liner having the thickness of 2mm. is provided on the internal wall of a case for the rocket motor testing having the inner diameter of 82.8mm. by a method wherein the layer blended with 100pts.wt. of EPDM rubber and 40pts.wt. of asbestos filaments is adhered thereto by valcanizing bonding. Subsequently, a primer, obtained by adding 5pts.wt. of the metallic nickel powder having the average grain diameter of 0.1mu to 100pts.wt. of a composition consisting of 1 equiv. wt. isophrone di-isocyanate basing on 1 equiv. wt. of polybutadiene having a terminal hydroxide group is coated on the internal surface of the liner and is cured under a temperature of 60 deg.C for 10hr to provide the primer layer. Next, an end face restrictor 8 of EPDM rubber sheet is adhered, a star-shaped core is erected at the center thereof, the slurry of the propellant is injected into the mold therefor and is cured under 60 deg.C for 150hr, then, the core is pulled out thereby manufacturing the propellant grain for the rocket motor for testing. |
