| 摘要 |
<p>Novel cross-linked elastomer derivatives of hydroxyl-terminated polyolefin are provided herein. They may be prepared by a single stage or a two stage procedure involving reacting a particularly recited hydroxylterminated polyolefin, namely, polybutadiene, polypentadiene, polyheptadiene, polyisoprene, polyethylene, polybutylene or polypropylene, each having hydroxyl end groups, a particularly recited acid anhydride, namely succinic anhydride, methylsuccinic anhydride, benzenedicarboxylic anhydride, phthallic anhydride, cyclobutanedicarboxylic anhydride, 3-methylgletaric anhydride, hexahydro-4-methylphthallic anhydride or 1,2-cis-cyclohexanedicarboxylic anhydride, and a particularly recited epoxide, namely a diglycidyl ether of polyoxypropylene glycol, an epoxide derivative of triglycidyl glycerol, 3,4epoxycyclohexylmethyl-3'4'-epoxycyclohexane carboxylates, bis(3,4-epoxy-6-methylcyclohexyl-methyl) adipate, N,N-diglycidyl-p-aminophenylglycidyl ether. the epoxy derivative of sebacic acid, or condensation products of epichlorohydrin and bisphenol-A in the presence of a metallic salt as catalyst or a metallic coordination compound. Propellants are also provided containing up to 88% of solid ammonium perchlorate in the powder form and aluminum powder and the cross-linked elastomer derivative of such hydroxyl terminates polyolefin as a binders. The physical and mechanical properties from these propellants depended on the ratios and on the order of addition of each ingredient, the curing temperatures and the presence of surface-active agents.</p> |
