High specific gravity material

Details High specific gravity material High specific gravity material

C - Chemistry, Metallurgy

08

L

C08L 57/00 (2006.01) C08K 3/08 (2006.01) C08K 9/08 (2006.01) C08L 53/00 (2006.01) C08L 53/02 (2006.01) C08L 55/02 (2006.01) F42B 5/28 (2006.01) F42B 7/00 (2006.01) F42B 12/74 (2006.01)

Patent

CA 2131494

A high specific gravity composition suitable for use as a lead-substitute, especially for firearms ammunition and angling weights, comprises:- (i) a polymer matrix comprising: (a) at least one rigid thermoplastic polymer component, e.g. polypropylene, polystyrene, etc. and (b) at least one elastomeric thermoplastic polymer component, e.g. various polystyrene-based copolymers; and (ii) dispersed in the polymer matrix particles of a high specific gravity weight material having a density and present in an amount such that the composition has a specific gravity of greater than one, preferably a specific gravity in the range 8 to 12. The high specific gravity weight material is preferably tungsten powder.

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