Plastic and nonmetallic article shaping or treating: processes – Explosive or propellant article shaping or treating – Rolling to form sheet or rod
Patent
1976-08-05
1977-08-02
Nelson, Peter A.
Plastic and nonmetallic article shaping or treating: processes
Explosive or propellant article shaping or treating
Rolling to form sheet or rod
264 3E, 149 92, 149100, C06B 2100
Patent
active
040396401
ABSTRACT:
A mouldable thermoplastic composition comprises (i) polyvinyl nitrate, (ii) nitrocellulose and/or polyvinyl acetate and (iii) 2-nitro-diphenylamine and may be used to form combustible articles such as cartridge cases. Preferably, the composition comprises from 30 to 90% by weight of polyvinyl nitrate based on the total weight of components (i) and (ii). The composition may comprise up to about 30% by weight, based on the weight of components (i) and (ii), of at least one additive selected from cellulose acetate, dinitrotoluene, phthalates, non-volatile esters, heterocyclic ketones, ureas and ABS copolymers.
The combustible articles may be formed by compression moulding or injection moulding. Preferably the mouldable composition is formed into granules using the "with solvent" technique for making single base propellants, and the granules are mixed with a porous powder comprising nitrocellulose prior to being moulded to form the combustible article.
REFERENCES:
patent: 3078200 (1963-02-01), Preckel
patent: 3422170 (1969-01-01), Brooks et al.
patent: 3428502 (1969-02-01), Evans
patent: 3447983 (1969-06-01), Camp et al.
patent: 3563977 (1971-02-01), Cucinotta
patent: 3669924 (1972-06-01), Daume et al.
patent: 3673286 (1972-06-01), Remaly et al.
patent: 3779820 (1973-12-01), Stevely et al.
Akiyama et al., Chem. Abst., 72, Abst. No. 3982u (1970).
Nelson Peter A.
Societe Nationale des Poudres et Explosifs
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