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Amine salts which are adducts of an ammonium ion donor selected from ammonium perchlorate, ammonium sulfate, ammonium formate, and equal molar mixture of ammonium perchlorate and ammonium formate and cyanoethyl substituted tetraethylene pentamine (TEPAN) or the glycidol reaction product of cyanoethy

Amine salts which are adducts of an ammonium ion donor selected from ammonium perchlorate, ammonium sulfate, ammonium formate, and equal molar mixture of ammonium perchlorate and ammonium formate and cyanoethyl substituted tetraethylene pentamine (TEPAN) or the glycidol reaction product of cyanoethyl substituted tetraethylene pentamine (TEPANOL) are employed as a bonding agent in a solid propellant composition employing a polyester binder of polydiethyleneglycoladipate. Unlike hydroxy-terminated polybutadiene wherein a bonding agent is solubilized and still can function as a bonding agent for inorganic ammonium oxidizer salts in the propellant matrix, polyester binders that solubilize the bonding agent renders the bonding agent ineffectual as a bonding agent. Therefore, with a polyester binder it was found that the bonding agent could not be soluble in the prebinder to be effective in improving mechanical properties. It was, however, necessary for the bonding agent to be finely dispersed since it is driven to the inorganic oxidizer salt surfaces where it homopolymerizes around or reacts with a second reactant, usually the propellant curative to form a shell which will subsequently react with the binder thus chemically reinforcing the binder/inorganic oxidizer salt matrix.

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A solid propellant composition employing a high-solids loading of about 67 parts of an ammonium oxidizer salt selected from ammonium perchlorate, ammonium nitrate, ammonium sulfate, and ammonium formate; a polyester binder system comprised of from about 22.29 to about 22.79 parts of the polyester po

A solid propellant composition employing a high-solids loading of about 67 parts of an ammonium oxidizer salt selected from ammonium perchlorate, ammonium nitrate, ammonium sulfate, and ammonium formate; a polyester binder system comprised of from about 22.29 to about 22.79 parts of the polyester polydiethyleneglycoladipate, a trifunctional polymer for crosslinking of about 3.72 parts of polycaprolactone, and a plasticizer of about 4.00 parts of dioctyladipate; a curing agent of isophorone diisocyanate of about 2.64 parts; a curing catalyst of triphenylbismuth and maleic anhydride of 0.015 parts each respectively; and a finely dispersed amine salt adduct of about 0.20 parts as a bonding agent that is insoluble in said polyester binder system, said finely dispersed amine salt bonding agent being an adduct of an ammonium salt selected from the ammonium salts consisting of ammonium perchlorate, ammonium nitrate, ammonium sulfate, and ammonium formate and an amine compound selected from the polyamine compounds consisting of cyanoethyl substituted tetraethylene pentamine and the glycidol reaction product of cyanoethyl substituted tetraethylene pentamine.