Mouldable compositions containing polyvinyl nitrate

Details Mouldable compositions containing polyvinyl nitrate Mouldable compositions containing polyvinyl nitrate

C - Chemistry, Metallurgy

08

L

400/1338, 52/42,

C08L 39/00 (2006.01) C06B 21/00 (2006.01) C06B 25/18 (2006.01) C06B 45/10 (2006.01) C08K 5/32 (2006.01) C08L 1/18 (2006.01) C08L 31/04 (2006.01) F42B 5/188 (2006.01) F42B 5/192 (2006.01)

Patent

CA 1039426

ABSTRACT OF THE DISCLOSURE A mouldab1e 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 nitro- cellulose prior to being moulded to form the combustible article.

206523

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