Ambient cure catalyst for solid propellants

Details Ambient cure catalyst for solid propellants Ambient cure catalyst for solid propellants

1989-12-14

1990-05-15

Lechert, Jr., Stephen J.

Explosive and thermic compositions or charges

Structure or arrangement of component or product

Particles of diverse size or shape

149 2, 149 194, 149 199, 149 42, 149 76, 149 92, 149113, C06B 4502

Patent

active

049255045

ABSTRACT:
A fast-acting cure catalyst for use in hydroxyl-terminated polybutadiene-ed solid propellant formulation is tris(ethoxyphenyl)bismuthine. The incorporation of this catalyst as an additive in an amount of about 0.025 weight percent into a composite propellant formulation enables the formulation to be ambient mixed and ambient cured at 80.degree. F. or accelerated oven cured at 140.degree. F. Both oven and ambient cures are considerably more cost effective than the conventional oven cure if the prior art cure catalyst, triphenylbismuthine (TPB), is used. Other composite propellant ingredients comprise ammonium perchlorate of about 65 weight percent, aluminum powder of about 14 weight percent, the organic oxidizer, cyclotetramethylenetetranitramine, of about 10 weight percent, isophorone diisocyanate additive to provide an isocyanate/hydroxyl ratio of about 0.92, and hydroxyl-terminated polybutadiene polymer of about 11.5 weight percent.

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patent: 4001058 (1977-01-01), Hawthorne
patent: 4131499 (1978-12-01), Flanigan
patent: 4412874 (1983-12-01), Huskins et al.
patent: 4429634 (1984-02-01), Byrd et al.
patent: 4597811 (1986-07-01), Ducote
patent: 4803019 (1989-02-01), Graham et al.

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