| 摘要 |
<p>Compounds of the formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="18" wi="52" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R, R' and R<Sup>2</Sup> are alkyl radicals having 1 to 20 carbon atoms, phenyl radicals which may be substituted by 1 or 2 alkyl groups having 1 to 8 carbon atoms, or cycloalkyl radicals having 7 to 12 carbon atoms, or cycloalkyl radicals having 5 to 12 carbon atoms; and wherein R<Sup>3</Sup> is hydrogen or an alkyl radical having form 1 to 4 carbon atoms. These compounds have utility as synergistic stabilizers with phenolic type antioxidants for the stabilization of organic materials such as natural and synthetic polymers, rubbers, lubricants and oils, etc.</p> |
