| abstract |
The present invention relates to thioesters having the structural formula:n n wherein R x is selected from the group of formulae consisting of:n n R¹, R² and R³ are independently selected from the group of radicals consisting of hydrogen or methyl; R⁴ and R⁵ are independently selected from the group of radicals consisting of hydrogen, alkyls having 1 to 18 carbon atoms, aryls having 6 to 10 carbon atoms, aralkyls having 7 to 9 carbon atoms, and radicals of the formula:n n and R⁶ is selected from the group of radicals consisting of alkyls having 1 to 24 carbon atoms, aryls having 6 to 12 carbon atoms and aralkyls having 7 to 12 carbon atoms. n These thioesters are particularly useful as a synergist for conventional phenolic and amine antioxidants. |