Suppression of Reactivity Changes in Poly bd (trade name) R-45M Resin
ARCO CHEMICAL CO NEWTON SQUARE PA
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Poly bd R-45M resin, a hydroxyl terminated homopolymer of 1,3- butadiene, is a primary component in the binder for many solid propellant systems. The aging characteristics of this resin are such that its rate of reactivity with an isocyanate may increase during storage for prolonged time periods at ambient temperatures. As a result, the pot lives of propellant mixtures prepared from the same lot of Poly bd R-45M resin may differ significantly over period of months. Under certain processing conditions, this reactivity difference may pose problems for the formulator. The addition of triphenylphosphine to the Poly db R-45M resin has been found to prevent these reactivity changes.
- Solid Propellant Rocket Engines