Rubber composition for base rubber of radial giant engineering tire and preparation method thereof

Abstract

The invention relates to the technical field of rubber, specifically to a rubber composition for base rubber of a radial giant engineering tire and a preparation method thereof. The rubber composition comprises: with 100 parts of natural rubber by weight as a reference, 25 to 35 parts of carbon black, 7 to 15 parts of white carbon black, 1 to 3 parts of a silane coupling agent, 1.25 to 1.38 parts of resorcinol-80, 0 to 3 parts of tackifying resin, 4 to 8 parts of zinc oxide, 2 to 3.5 parts of stearic acid, 1 to 2 parts of protective wax, 1 to 4 parts of N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine, 1 to 2 parts of a 2,2,4-trimethyl-1,2-dihydroquinoline polymer, 0 to 0.5 part of an anti-reversion agent, 1.25 to 1.58 parts of a mixture composed of 80% of hexamethylenetetramine and 20% of a cemented body and a dispersant, 1.4 to 1.8 parts of sulfur, 0 to 0.5 part of a mixture composed of 80% of dithiodimorpholine and 20% of the cemented body and the dispersant, 1.28 to 1.65 parts of a vulcanizing accelerator N-tert-butyl-2-benzothiazolyl sulfonamide and 0.2 to 0.4 part of a scorch retarder N-cyclohexylthiophthalimide.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a heat-resistant radial giant engineering tire tire base rubber composition. Background technique [0002] As we all know, the radial giant OTR tire has large size, thick carcass, long vulcanization time, and serious heat vulcanization reversion; the tread pattern is deep, the thickness of the rubber composition at the shoulder part is large, the heat dissipation is poor, and the continuous accumulation of heat makes the tire shoulder belt layer The temperature at the tire and tread position is too high, exceeding the critical temperature between the tire base rubber and the belt layer rubber, and the fatigue and aging of the rubber material are accelerated; engineering vehicles have a large load and the operating environment is harsh, requiring the tire to have a certain load-bearing capacity and produce Lower heat to prevent the performance of the rubber compound from deterior...

AI Technical Summary

Problems solved by technology

[0004] The base rubber of radial giant OTR tires has high heat generation, severe vulcanization and reversion, and low thermal aging performance retention rate. After a period of operation in the mine, there will be an obvious interface between the bottom of the tread and the belt layer. Delamination occurs, which seriously affects the service life of the tire

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