Di-(alken-1-yl)-substituted borinic acids and borinates as oxidation inhibitors for carbon composites

A carbon-carbon composite comprising a combination of a carbon filler and a cured resin formed by polymerization of a monomer composition containing an organic boron-containing compound that is not oxidized and does not form a separate glassy phase but is uniformly distributed throughout the cured resin and having the formula:

• ##STR14## in which R.sup.1, R.sup.2, R.sup.3, R.sup.4, and R.sup.5 are independently selected from the group consisting of H, C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 alkenyl, C.sub.2 -C.sub.6 alkynyl, C.sub.3 -C.sub.7 cycloalkyl, C.sub.5 -C.sub.7 cycloalkenyl, aryl, (C.sub.2 -C.sub.6 alkyl)-substituted aryl, (C.sub.2 -C.sub.6 alkenyl)-substituted aryl, and (C.sub.2 -C.sub.6 alkynyl)-substituted aryl, with the proviso that at least one of R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 is other than H.