Tire bead adhesive for radial tire and preparation method thereof

Abstract

The invention mainly discloses a tire bead adhesive for a radial tire. The adhesive is characterized by being prepared from the following components by mass: with 50 parts of natural rubber NR and 50 parts of low cis BR as standard, 6+-1 parts of zinc oxide, 3+-0.5 parts of stearic acid, 2+-0.5 parts of an anti-aging agent 4020, 1+-0.5 parts of an anti-aging agent RD, 1.5+-0.5 parts of protective wax, 2.5+-1 parts of a strengthening agent, 1.2+-0.5 parts of a promoter and 0.8+-0.3 part of sulphur. The invention has the following advantages: a, since low cis BR can be used to substantially substitute aromatic hydrocarbons during utilization, cost for the adhesive is reduced; b, usage amount of resin can be increased, which ensures technical viscosity of the adhesive; c, since low cis BR rapidly eats carbon black, considerable carbon black can be filled, and a reverse smelting process is employed, thereby saving time and improving production efficiency; d, overall performance of the adhesive is similar to the performance of imported low cis adhesives; e, Mooney viscosity can be controlled to be in a range of 45 to 51.

Description

technical field [0001] The invention relates to a radial tire spout rubber, in particular to a radial tire spout made of low smooth rubber. Background technique [0002] During the running of the tire, the slit part needs excellent wear resistance and high hardness due to the contact with the rim; and the slit filler should have low hysteresis loss and low compression set. [0003] Traditionally, ordinary butadiene rubber is used in the treatment of tire rims. The disadvantage is that there is a certain limit to the amount of combined carbon black. Although increasing the amount of carbon black can increase the hardness of the rubber compound, it does not affect the processing and extrusion of the rubber compound. It is extremely unfavorable, the processing technology is difficult, and the amount of carbon black is also limited. Adding reinforcing resin can also increase the hardness of the rubber compound, but it will cause the disadvantage of poor wear resistance of the ru...

AI Technical Summary

Problems solved by technology

[0003] Traditionally, ordinary butadiene rubber is used in the treatment of tire rims. The disadvantage is that there is a certain limit to the amount of combined carbon black. Although increasing the amount of carbon black can increase the hardness of the rubber compound, it does not affect the processing and extrusion of the rubber compound. Extremely unfavorable, the processing technology is difficult, and the amount of carbon black is also limited. Adding reinforcing resin can also increase the hardness of the rubber compound, but it will also cause the disadvantage of poor wear resistance of the rubber compound.

[0005] However, there is no relevant report on the local application of low-cis rubber to the tire bezel to enhance the wear resistance of this part.

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