A kind of protective rubber composition for tire pads and its preparation method

Abstract

The present invention provides a rubber compound for tire pads and a preparation method thereof, which solves the technical problems that the existing metal gaskets on the tire pads are easy to cut the tire or the pads and are easy to be worn out. According to parts by weight, the composition is as follows: 70-95 parts of isoprene rubber, 5-30 parts of SBR1507 rubber, 2.5-5 parts of nano-zinc oxide, 1.5-3 parts of stearic acid, 1.5-3 parts of dispersant HT, 5-3 parts of white carbon black 20 parts, 40-70 parts of carbon black N351, 1-3 parts of anti-aging agent DTPD, 1-3 parts of anti-aging agent IPPD, 1-2 parts of silane coupling agent NXT, 1-3 parts of resin A-250, insoluble sulfur OT7020 3 ~5 parts, 0.8~1.5 parts of accelerator TBSI, 1~3 parts of vulcanizing agent DTDM, 2~6 parts of methylene donor RA65; the total parts of isoprene rubber and SBR1507 rubber are 100 parts; The preparation method of one-stage mixing, two-stage mixing, three-stage vulcanization and film forming of the rubber compound for rubber tire pads can be widely used in the technical field of rubber tires.

Description

technical field [0001] The invention relates to the technical field of rubber tires, in particular to a rubber tire protector composition and a preparation method thereof. Background technique [0002] As an important part of the vehicle, tires affect the performance of the vehicle and are more related to driving safety. A common pneumatic tire with inner tube is mainly composed of outer tire, inner tube and pad. The inner tube is filled with compressed air, and the outer tire is used to protect the inner tube from damage and has a certain degree of elasticity; the cushion belt is a device set between the rim and the inner tube to protect the inner tube. The damage caused by friction can also slow down the extrusion of the toe of the outer tire to the inner tube and prolong the service life of the inner tube. [0003] The inner tube valve passes through the hub slot hole and extends inward to the rim side. Therefore, the nozzle hole of the pad is easily damaged by the frict...

AI Technical Summary

Problems solved by technology

[0004] (1) Install an external metal gasket at the mouth hole of the pad, there is a hidden danger that the edge of the metal gasket or the broken section will cut the tire or the pad, thus affecting the use of the tire or the pad

[0005] (2) In the installation process of the pad belt, although the direct contact between the existing metal gasket and the valve nozzle can be avoided, the inner tube inevitably shifts during the use of the tire, so that the valve nozzle and the valve nozzle on the inner tube are inevitably displaced. The direct contact with the metal gasket will cause the inner tube valve nozzle to wear the metal gasket and shorten the service life of the gasket

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