The results showed that TNP had better ability to enhance the anti-aging property of antioxidant 264.

Antioxidant tris (nonyl phenyl) phosphate was prepared with nonyl phenol and phosphorus trichloride as raw materials, arene as solvent and by using directive esterification method.

The test showed that, the acid phosphite with high chemical activity has excellent extreme-pressure anti-wear property but heat oxidation stability, anti-corrosion and anti-rust properties are poor;