Patent ID: 9133070
Filing Date: 2015-09-15
Classification: C06B

Abstract:
1. A smokeless propellant composition, comprising: based on a total weight of the composition, 5.0˜15.0 wt % of a binder prepolymer, including a polymer having a hydroxyl group (—OH) at a chain terminal; 10.0˜70.0 wt % of an oxidizer; 1.0˜5.0 wt % of a combustion improver, including bismuth subsalicylate or bismuth salicylate; 0.5˜3.0 wt % of a urethane curing agent, including isophorone diisocyanate (IPDI); 0.1˜1.5 wt % of a cross-linking agent, including trimethylol propane (TMP); and a remainder of one or more additives selected from the group consisting of a propellant aging stabilizer, a plasticizer, a combustion stabilizer, a burning catalyst, a neutral polymeric binder and a urethane curing catalyst wherein the combustion stabilizer is zirconium carbide and is used in an amount of 0.5˜3.0 wt % based on the total weight of the smokeless propellant composition, wherein the burning catalyst is carbon black and is used in an amount of 0.1˜1.0 wt % based on the total weight of the smokeless propellant composition, and wherein the urethane curing catalyst is triphenylbismuth (TPB), and is used in an amount of 0.05˜0.3 wt % based on the total weight of the smokeless propellant composition.