A new class of ballistic modifiers and the synthesis thereof is disclosed herein and are used in propellants either individually or as admixtures in percentages of approximately 0.5 to 6 weight percent to impart mesa or plateau burning rate characteristics over a wide pressure range and reduce the temperature sensitivity of the propellants in relation to burning rates. The modifiers are chelate type compounds comprised of lead and/or copper, and various predetermined molar ratios of compounds such as salicylic acid and beta-resorcylic acid.
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