| abstract |
The invention discloses a hindered phenolic antioxidant which simultaneously contains carboxyl group, mercapto group, amide bond and phenolic hydroxyl functional group in molecular structure, and discloses a preparation method of the antioxidant: (1) combining mercapto-containing amino acid and carboxyl group Phenol is added to the organic solvent, and a condensing agent and an alkaline reagent are added, and the reaction is carried out at 20-80 ° C for 2-24 h; (2) after the reaction is completed, cooling, suction filtration, filter cake washing, drying to constant weight, that is, to obtain The hindered phenolic antioxidant. On the one hand, the hindered phenol antioxidant of the present invention is beneficial to enhance the protective ability of the antioxidant itself, and on the other hand, it is beneficial to improve the physical and mechanical properties of rubber; the preparation method of the present invention is simple and easy to operate, has high universality, and can be It shares organic synthesis instruments and equipment, and the equipment has high versatility and has good market application value in the rubber industry. |