High-thermal-conductivity and heat-resistant tire shoulder pad rubber composition

Abstract

The invention relates to the technical field of rubber, in particular to a high-thermal-conductivity and heat-resistant tire shoulder pad rubber composition. On the basis of 100 parts by weight of natural rubber components, the rubber further comprises the following components in parts by weight: 100 parts of natural rubber, 30-50 parts of carbon black, 5-15 parts of hydrated silicon dioxide, 5-15 parts of zinc oxide / stearic acid, 2-5 parts of N, N '-xylyl-p-phenylenediamine / 2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 1-3 parts of silane coupling agent, 1-5 parts of graphene oxide, 1-5 parts of N, N'-dimethylphenyl-p-phenylenediamine / 2, 2, 4-trimethyl-1, 2-dihydroquinoline polymer, 1-3 parts of silane coupling agent, 1-3 parts of silane coupling agent, 1-3 parts of silane coupling agent, 1-3 parts of silane coupling agent, 1- According to the invention, the graphene oxide is added, so that the heat-conducting property of a rubber material is improved, and the N, N '-m-phenylene bismaleimide is added, so that the heat-resisting property of the rubber material is improved, and therefore, the tire shoulder pad rubber composition with excellent heat-resisting property and high heat-conducting property is obtained.

Description

Technical Field

[0001] The invention relates to the technical field of rubber, in particular to a high-heat-conductive and heat-resistant tire shoulder pad rubber composition. Background Art

[0002] As we all know, the tire cushion rubber is located at the shoulder of the tire. Its main function is to support the belt layer and keep the entire belt layer parallel during the inflation process, so as to increase the contact area between the tire and the ground, improve the driving force and enhance the wear resistance. Due to the location of the shoulder, there are many endpoints of the steel belt layer. During the driving process, the strain frequency here is high and the internal stress is very concentrated, which can easily cause high heat generation in the shoulder. At the same time, the shoulder rubber is thick and has poor thermal conductivity. The heat is not easy to be discharged, resulting in heat accumulation in the shoulder, which can easily lead to aging and degradation of the cushion rubber, resulting in the problem of shoulder de-airing and early damage to the tire. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art and to provide a high thermal conductivity and heat-resistant tire shoulder pad rubber composition, wherein the pad rubber has the properties of low heat generation, heat resistance, and high thermal conductivity.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: a giant engineering machinery tire crack-resistant carcass rubber composition, characterized in that, based on 100 parts by weight of the natural rubber component, it also contains the following components in parts by weight:

[0005]

[0006] The beneficial effect of the present invention is that the thermal conductivity of the rubber compound is improved by adding graphene oxide, and the heat resistance of the rubber compound is improved by adding N,N'-m-phenylene bismaleimide, thereby obtaining a shoulder pad rubber composition with excellent heat resistance and high thermal conductivity. DETAILED DESCRIPTION

[0007] The present invention will be further described below in conjunction with embodiments:

[0008] The natural rubber of the present invention is 20# standard rubber, the p-phenylenediamine antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl p-phenylenediamine, the ketoneamine antioxidant is 2,2,4-trimethyl-dihydroquinoline polymer, and the sulfenamide accelerator is N-tert-butyl-2-benzothiazole sulfenamide.

[0009] The technical solution adopted by the present invention to solve the technical problem is: by adding N,N'-m-phenylene bismaleimide material which produces CC bonds with high thermal stability after vulcanization, the thermal stability of the rubber compound is improved; by adding graphene oxide material with high thermal conductivity, the thermal conductivity of the rubber compound is improved. See Table 1 for details.

[0010] Table 1. Examples (the content of each raw material in this table is in parts by weight)

[0011]

[0012] The performance test data of the embodiment of the present invention is shown in Table 2.

[0013] Table 2: Performance test data

[0014]

[0015] The invention has the advantages that: by adding N,N'-m-phenylene bismaleimide, polysulfide crosslinking bonds are broken during vulcanization, N,N'-m-phenylene bismaleimide participates in the vulcanization reaction to form hybrid crosslinking bonds, and after reversion, the main chain is modified and crosslinking compensation is performed, thereby showing excellent heat resistance.

[0016] By adding graphene oxide material with high thermal conductivity, the thermal conductivity of the rubber is increased by more than 18%, which can promptly dissipate the heat generated inside the tire shoulder.

Claims

1. A high thermal conductivity and heat-resistant tire shoulder pad rubber composition, characterized in that: Based on 100 parts by weight of the natural rubber component, the following components are also included in parts by weight: N,N'-Dimethylphenylene-p-phenylenediamine / 2,2,4-trimethyl-1,2-dihydroquinoline polymer

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