Matrix and Coating Polymers for Composite LOX Containers

Two poly(arylene ether phosphine oxide)s (PAEPOs) have been found to be suitable as matrix and coating materials for composite-material (matrix/fiber) tanks and pipes that contain liquid oxygen (LOX). One of these PAEPOs is denoted by the trade name "Triton Oxygen Resistant" (TOR); this is a clear, yellowish material with the structural formula shown in the figure. The other PAEPO is a clear, colorless material called "colorless oxygen resistant" (COR).