| 摘要 |
Contaminant metal ions of the transition elements such as copper and iron for example may give rise to serious problems in the curing of polymeric binders for conventional rubber-based solid propellants. These metal ions may accelerate the curing action to such a degree that the potlife of the freshly mixed polymer is reduced. Also, the metal ions may promote oxidative degradation of cured and uncured polymeric systems. These undesirable effects can be prevented by adding to the uncured polymer certain polymer-soluble agents which are capable of forming stable complexes with the undesirable metal ions in which the valence of the metal ion is fixed. These agents are selected from a large group of compounds and compositions comprising certain hydroxy substituted aromatic compositions. The preferred embodiments are pyrogallol, propyl gallate, octyl gallate, decyl gallate, purpurogallin and alizarin.
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