Glycoluril derivatives as antioxidants, and processes for their production.

摘要

An acetylene carbamide derivative is of the general formula (I):
<Chemistry id="chema01" num="0001"><Image id="ia01" he="37" wi="75" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein each A is
<Chemistry id="chema02" num="0002"><Image id="ia02" he="21" wi="32" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein R<Sub>1</Sub> is hydrogen or C<Sub>1-4</Sub> alkyl, and X is A or hydrogen.

Five tetrakis and five tris specific compounds are named. The derivatives can be produced from an acetylene carbamide
<Chemistry id="chema03" num="0003"><Image id="ia03" he="38" wi="59" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>by reaction with a p-hydroxybenzyl alcohol, a dialkyldithiocarbamate, or formaldehyde and a phenol.

The derivatives (1) are useful in an amount of 0.001 to 10% by weight as stabilizers against deterioration by light or oxygen of organic substances such as polymers, rubbers and petroleum products. They may be used together with a sulfur or phosphorus-containing antioxidant or a hindered amine light stabilizer.