0 to 2; p has the general formula ##STR6## wherein R1 represents a tertiary butyl group and wherein the values of x, a, and w are such that not more than one of x, a, or w can equal 0 at a time; and hindered phenolic antioxidants of the general formula ##STR7## wherein R3 has the formula ##STR8## wherein R5 is a tertiary butyl group; and R4 is selected from the group consisting of --H, an alkyl g