Cast double-base propellant manufacture

The difficulty in the manufacture of large grains may be overcome by substituting the classical method for the extrusion of powder by a novel technique whereby cast charges of double base propellant are produced. 

Nitrocellulose is transported in tightly closed drums or in pasteboard drums lined with plastic bags inside, which contain at least 25% of a moisturizing agent (water, alcohol, isopropanol, butanol, etc.). Spherical NC particles are precipitated from solution under vigorous stirring, and preferably used for manufacturing of cast or composite double base propellants. 

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