6results about "Nitrocellulose explosive compositions" patented technology

The invention relates to a combustible propellant charge case for ammunition dischargeable from a gun barrel, comprising cellulose, nitrocellulose, MO3 particles, wherein M = Mo and / or W, and cationic surfactant, wherein the average particle size d50 of the MO3 particles is 0.5–2.0 µm, the maximum particle size d100 of the MO3 particles is ≤ 20 µm, and the quotient of the average MO3 concentration in wt.% in a volume element of approximately 0.05 to 1.0 cm3 (cVE) at any desired point in the propellant charge case and the total MO3 concentration in wt.% (ctot) in the propellant charge case is cVE:ctot = 0.80–0 1.20.

To provide a propellant composition that does not use nitroglycerin, which is difficult to handle safely, and that has a combustion temperature and low pressure index suitable for the application. [Solution] A propellant composition characterized by containing the following components: (a) nitrocellulose (NC): 15% by mass or more; (b) cyclotrimethylenetrinitramine (RDX): 1% by mass or more and 45% by mass or less; (c) nitroguanidine (NQ): 15% by mass or more and 60% by mass or less; (d) energy plasticizer other than nitroglycerin: 5% by mass or more and less than 15% by mass; and (e) additive as an optional component: 5% by mass or less; and having Q = {mass% of component (b) + mass% of component (d)} ÷ {mass% of component (c)} of 0.1 or more and 3.0 or less, and satisfying the following conditions: (i) component (b) is 24% by mass or less, or (ii) component (b) is greater than 24% by mass and the sum of component (b) and component (c) is greater than 58% by mass.

A combustible propellant charge sleeve for ammunition which can be fired from an armor barrel includes pulp, nitrocellulose, MO3 particles, wherein M=Mo and / or W, and cationic surfactant, wherein the average particle size d50 of the MO3 particles is 0.5-2.0 μm, the maximum particle size d100 of the MO3 particles is ≤20 μm, and the quotient of the average MO3 concentration in % by weight in a volume element of about 0.05 to 1.0 cm3 (CVE) at any point in the propellant charge sleeve and the total MO3 concentration in % by weight (Ctotal) in the propellant charge sleeve is CVE:Ctotal =0.80-1.20.

Enhanced combustion ignition cord: An ignition cord for the combustion of a propellant charge contained within a cartridge case, said cord consisting of a core comprising a pyrotechnical material and surrounded by a sheath, characterized in that the sheath consists of two concentric cylindrical tubes between which is arranged a free-flowing powdered energy material. The two tubes are made of an inert polymer material or are based on an extruded powdered energy material, or alternatively, one of the tubes may be made of an inert polymer material and the other of an extruded powdered energy material.

The invention belongs to the technical field of nitrocotton preparation, and particularly relates to ultrahigh-nitrogen nitrocotton and a preparation method thereof. In order to further improve the nitration degree of B-grade nitrocotton, the invention provides a preparation method of nitrocotton with ultrahigh nitrogen content, which comprises the following steps: carrying out esterification reaction on defibered flocculent cotton and mixed acid in a mass ratio of 1: (40-60) at 15-19 DEG C for 36-45 minutes, wherein the mixed acid contains 26-35 wt% of nitric acid, 5.0-8.0 wt% of water, 0.5-0.8 wt% of nitric oxide and the balance of sulfuric acid. According to the method, the mixed acid formula in the esterification reaction is improved, and the liquid-solid ratio, the reaction temperature and the reaction time are improved, so that the nitrification degree of the B-grade nitrocotton is obviously improved, and the nitrification degree is 216.5-218 mL / g. The improvement of the nitration degree of the B-grade nitrocotton is a favorable support for improving the product energy and further improving the capacities of propellant powder, propellants and the like.