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US 5,510,062 AGranted
Method of producing a nitrocellulose propellant containing a cellulosic burn rate modifier infiltrated therein
AssigneeOlin Corporation
InventorsWilliam L. O'Meara, Terry A. Murray
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Abstract
There is disclosed a propellent having a deterred burn rate. The propellent is a particulate containing a nitrocellulose base and a cellulosic thermoplastic deterrent, preferably cellulose acetate butyrate or cellulose acetate propionate. The deterrent is gradationally dispersed within the particulate with the greatest concentration of deterrent at the particulate periphery.
Claims11
A method for the manufacture of a propellant, comprising the steps of:
- a). heating an aqueous suspension containing nitrocellulose particulate to a temperature of from about 30.degree. C. to about 70.degree. C., the ratio, by weight, of water to particulate being from about 2:1 to about 20:1;
- b). adding to said aqueous suspension a nonaqueous solution containing a dissolved cellulosic thermoplastic in a concentration of from about 1% to about 25%, by weight;
- c). agitating said nonaqueous/aqueous solution mixture for a time effective for said nonaqueous solution to penetrate at least partially into said particulate;
- d). removing substantially all of a nonaqueous solvent component from said mixture;
- and
- e). removing substantially all of said water thereby producing a cellulosic thermoplastic deterred propellant.
3 more elements
Dependencies are inferred from the claim text.