Non-toxic, metallic-boron-containing, IR tracer compositions and IR tracer projectiles containing the same for generating a dim visibility IR trace

Inactive Publication Date: 2006-10-19
GENERAL DYNAMICS ORDNANCE & TACTICAL SYST CANADA
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Benefits of technology

[0061] A binder maintains the other particulate forms of the constituents of the IR tracer composition together. The binder increases the structural integrity of the IR tracer material to prevent any break up of the IR trace in flight. It protects the IR tracer composition from moisture and increases the flowability

Problems solved by technology

An oxidizer and a fuel alone, however, do not make practi

Method used

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  • Non-toxic, metallic-boron-containing, IR tracer compositions and IR tracer projectiles containing the same for generating a dim visibility IR trace

Examples

Experimental program
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Embodiment Construction

Preparation of Compositions

[0063] The IR tracer compositions were prepared by first dry mixing the powdered ingredients to provide a dry intermediate composition. The binder was dissolved in a suitable aprotic solvent, namely, methyl ethyl ketone. The so-formed binder solution was then incorporated into the dry intermediate composition to provide a wet mixture. The wet mixture so provided was transferred to a suitable mixer in order to obtain a substantially-completely homogeneous mixture of all ingredients. The homogenous mixture so-formed was dried in an oven at about 20-40° C. until it was sufficiently dry for sieving. The dry mixture was then sieved to break up agglomerated particles. The IR tracer compositions are thus provided as relatively small particles of random shape.

[0064] A series of IR tracer compositions was prepared according to the proportion of ingredients as set forth in the following Tables 1A and 1B.

TABLE 1AINGREDIENTPERCENTAGE IN TEST NOTEST NODT-63DT-64DT-...

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Abstract

A novel non-toxic IR tracer composition is provided herein which, when incorporated into an IR tracer projectile which is then fired, generates a dim visibility IR trace. Such IR tracer composition is a non-toxic, metallic-boron-containing, IR tracer composition comprising: from about 20 to about 30% by weight, or from about 45 to about 60% by weight, of at least one of potassium chlorate or sodium nitrate; from about 5 to about 16% by weight of a metallic fuel which consists of metallic boron; optionally, from about 15 to about 25% by weight, or from about 40 to about 50% by weight, of a non-metallic fuel which consists of sodium salicylate; from about 5 to about 20% by weight of a retardant which consists either of iron carbonate, or magnesium carbonate or calcium carbonate; from about 5 to about 15% by weight of a first binder which consists of calcium resinate; and up to about 7.5% by weight of a second synthetic resin binder which consists either of a copolymer of hexafluoropropylene and vinylidene fluoride or cellulose acetate butyrate, wherein the total percentage of such ingredients add up to 100%. A novel IR tracer projectile containing such IR tracer composition for generating a dim visibility IR trace is also provided.

Description

FIELD OF THE INVENTION [0001] This invention relates to non-toxic, metallic-boron-containing, IR tracer compositions and to IR tracer projectiles containing such IR tracer compositions for generating a dim visibility IR trace. BACKGROUND OF THE INVENTION [0002] The art is replete with patents which are directed to compositions containing metallic boron for various purposes, including, e.g., tracer compositions, incendiary compositions and pyrotechnic compositions. Among such prior art patents are the following: [0003] U.S. Pat. No. 5,639,984, patented Jun. 17, 1997, INFRARED TRACER COMPOSITION and assigned to Thiokol Corporation. Those patented composition included strontium peroxide and barium peroxide in addition to metallic boron. However, such infrared tracer compositions suffered the defect that barium was a toxic element. [0004] U.S. Pat. No. 5,056,435, patented Oct. 15, 1991, INFRARED ILLUMINANT AND PRESSING METHOD, issued to L. L. Jones et al. Such patented compositions cont...

Claims

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Application Information

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IPC IPC(8): C06B45/10F42B10/00
CPCC06B23/007C06C15/00C06B33/00
Inventor GUINDON, LOUISEJALBERT, CAROLLEPAGE, DANIEL
Owner GENERAL DYNAMICS ORDNANCE & TACTICAL SYST CANADA
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