Propellant binders cure catalyst
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorsRussell Reed, Jr., May L. Chan
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Abstract
A multiple component catalyst system for curing of energetic urethane bins for solid fuel propellants and gas generators based upon curing of glycidyl-azide polymer and isocynate curative mixtures. Void or bubble free propellant grains are obtained by employing a cure catalyst composed of a mixture of triphenyl bismuth and dibutyltin dilaurate, preferably in a respective ratio of about 10:1 by weight. The void free propellant grains have burn characteristics acceptable for missile propulsion applications.
Claims14
A process for the curing of a glycidyl-azide polymer (GAP)/isocyanate binder system which comprises:
- (a) adding a non-gassing catalyst to a mixture comprising glycidyl-azide polymer and isocyanate curative to form said binder system;
- and
- (b) curing said binder system to form a substantially void free grain.
Dependencies are inferred from the claim text.