in contains from about 5 to about 50 repeating units or segments; a process wherein Rt is phenyl, R1 is 4-octylphenyl or 4-dodecylphenyl, R2 is a phenyl or methyl, and R3 is a methyl; a process wherein the a hydrophobic compound R1 -OH (X) is 4-tert- octylphenol or 4-dodecylphenol; a process wherein said phosphorus ester is triphenyl phosphite; a process wherein the oxidizing agent selected from t