초록 ▼

The processing and cure of high solids (>85%) composite propellants at ambient temperature and pressure is accomplished by using a small amount (.ltoreq.0.1 weight percent) of a liquid dialkyl tin catalyst, such as dibutyltindiacetate and dibutyltindilaurate. The propellant binder system is composed

The processing and cure of high solids (>85%) composite propellants at ambient temperature and pressure is accomplished by using a small amount (.ltoreq.0.1 weight percent) of a liquid dialkyl tin catalyst, such as dibutyltindiacetate and dibutyltindilaurate. The propellant binder system is composed of a branched, oxygen-containing polymer, such as polyethers, polypropylene oxide, polybutylene oxide, high homologues or mixtures thereof, and a sterically hindered diisocyanate curing agent. The liquid dialkyl tin catalyst unexpectedly serves as a wetting agent to lower the viscosity of the composite propellant formulation.

대표청구항 ▼

[ What is claimed is:] [1.] A process for preparing a cast and cured high-solids propellant comprising:casting an uncured high-solids composite propellant formulated from constituents comprising an ammonium nitrate oxidizing agent, a reactive metal, and a binder comprised of a branched polyether con

[ What is claimed is:] [1.] A process for preparing a cast and cured high-solids propellant comprising:casting an uncured high-solids composite propellant formulated from constituents comprising an ammonium nitrate oxidizing agent, a reactive metal, and a binder comprised of a branched polyether containing reactive, sterically hindered hydroxyl groups, a sterically hindered diisocyanate curing agent, a liquid dialkyl tin catalyst in the range from 0.002 to 0.1 weight percent of the propellant, wherein the weight percent of solids in the uncured high-solids composite propellant is greater than 85%; andcuring the high-solids composite propellant.