Production method of spherical high-content rubber antioxidant RD

Abstract

The invention discloses a production method of a spherical high-content rubber antioxidant RD. The process of the method comprises the following steps: aniline, hydrochloric acid and acetone are added into a reaction kettle under the conditions that the temperature is 80 DEG C to 190 DEG C and the rotating speed is 500 rev / min to 2000 rev / min according to the mass ratios that the mass ratio between the acetone and the aniline is 3-10:1 and the mass ratio between the hydrochloric acid catalyst and the aniline is 1:5-15, the reaction is carried out for 2 to 10 hours, and antioxidant RD gelatin with the content of 60% to 90% is obtained by the reaction; and the antioxidant RD gelatin is fed into a granulation tube with the diameter of 0.2mm to 5mm under the pressure of 0.2MPa to 1MPa, fluid is controlled within the range of smooth flow, disturbance with the frequency of 50Hertz to 500Hertz is applied to the fluid, the fluid ruptures to form uniform droplets, and the droplets are crystallized and solidified in a falling process so as to form the spherical high-content rubber antioxidant RD with uniform granularity. The invention has the advantages that the operation of the new technology is simple, the content of the effective components of the produced antioxidant RD is high, and the problem that the RD can not be applied to radial tire is thoroughly solved as the content of the effective components of the RD is low; and the RD is uniform spherical granules and is not easy to break, no dust pollution exists in the processes of manufacture and use, automatic weighing can be realized, and the RD has favorable fluidity and dispersivity.

Description

technical field [0001] The invention relates to a production method of spherical high-content rubber antioxidant 2,2,4-trimethyl-1,2-dihydroquinoline polymer (RD), which belongs to the technical field of rubber antioxidant RD production. Background technique [0002] Anti-aging agent RD for automobile radial tire is a general-purpose anti-aging agent with excellent anti-aging performance in the rubber industry. It is widely used in various tires, rubber hoses, tapes and other rubber products. At present, RD products produced by traditional technology have low content of active ingredients (the active ingredients are dimers, trimers and tetramers), which cannot meet the production requirements of radial tires, and because the products generally have a sheet structure, there is a problem of poor product fluidity , easy to break, serious dust pollution in the process of production and use, unable to realize a series of problems such as automatic metering and uniform dispersion....

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a production process of spherical high-content rubber antioxidant RD. The process is simple to operate, and the obtained RD has high purity. The RD product is prepared into spherical shape, which not only meets the needs of special antioxidant RD for automobile radial tires High content requirements, and solve the problem of dust pollution, automatic weighing in the use process, good fluidity and dispersibility