Tracer composition and method of producing same

Details Tracer composition and method of producing same Tracer composition and method of producing same

1990-06-05

1990-12-25

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Structure or arrangement of component or product

Coated component

149 193, 149 43, 149 44, 149 61, 1491096, 264 34, C06G 4532

Patent

active

049799991

ABSTRACT:
A tracer composition with a relatively high luminous output and a moderate burn rate includes from 35 to 47% by weight magnesium; from 40 to 53% by weight strontium nitrate, from 2 to 10% by weight magnesium carbonate, from 0 to 6% by weight color intensifier; from 0 to 6% by weight retardant and from 3 to 8% by weight of a synthetic polymer binder selected from the group consisting of (i) a terpolymer of vinylidene fluoride, hexafluoropropylene and polytetrafluoroethylene and (ii) a copolymer of vinylidene fluoride and hexafluoropropylene. The composition is produced by dry mixing all of the ingredients except the magnesium and binder, dissolving the binder in a solvent such as acetone, forming a homogeneous mixture of particulate magnesium and binder solution, adding a non-solvent such as hexane to the mixture to initiate precipitation of the binder, mixing the dry mixture with the magnesium/binder combination, and adding additional non-solvent to complete precipitation of the binder, and drying the mixture thus produced.

REFERENCES:
patent: 3862865 (1975-01-01), McManus et al.
patent: 3886009 (1975-05-01), Puchalski
patent: 3972291 (1976-08-01), Braun et al.
patent: 4094711 (1978-06-01), Ramnarri
patent: 4302259 (1981-11-01), Ward
patent: 4597810 (1986-07-01), Trickel et al.

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