| abstract |
ORGANIC MATERIALS, PARTICULARLY SYNTHETIC POLYMERS SUCH AS POLYPROPYLENE, ARE PROTECTED AGAINST OXIDATION IN AIR, THERMAL DEGRADATION OR DETERIORATION BY INCLUDING, IN SUCH SUBSTANCES, A STABILIZING AMOUNT OF AN ANTIOXIDANT. THE ANTIOXIDANT IS OBTAINED BY REACTING (A) AN A,B-UNSATURATED ETHER OF A HINDERED HYROQUINONE AND (B) A PHOSPHINODITHIOIC ACID OR A O,O-DIESTER OF PHOSPHOROTHIOLOTHIONIC ACID. |