Run-flat tire side support rubber, preparation method and tire structure thereof

Abstract

The invention relates to the technical field of tires and in particular to run-flat tire side support rubber, a preparation method and a tire structure thereof. Neodymium series butadiene rubber usedby a sizing material is polybutadiene with high cis-form-1,4-structure content obtained by using a neodymium compound as a main catalyst, so the support rubber has higher tensile property and resilience property, good carbon black dispersing performance, and more excellent aging-resistant performance. White carbon black adopts a 1115MP type with high dispersion and a low superficial area. The high-dispersion-type low-superficial-area white carbon black is capable of effectively improving tear resistance and thermal aging resistance of a support rubber part, and effectively reducing 15% of thermogenesis performance. Through a formula of the relayed sizing material, the prepared support rubber has stronger physical characteristics of tear resistance, high stretching, high strength, high temperature resistance and the like. Through a special design and a matching ratio in structure and formula aspects, the tires can be guaranteed to be continuously driven still in a speed of 80 km/h in azero air pressure state, and a steering wheel cannot be easily deviated from a driving direction in a driving process, until a next maintenance point is found out.

Description

technical field [0001] The invention relates to the technical field of tires, in particular to a side support rubber for a run-flat tire, a preparation method thereof and a tire structure. Background technique [0002] Safety in today's society is very important in car driving, and tires play a decisive role in the safety of cars. Ordinary passenger car tires have thinner sidewalls, which pose some potential safety hazards during driving. For example, when the curb is scratched or hard objects are squeezed, it is easy to cause sidewall rupture and air leakage or tire blowout, which will cause the car to lose direction and cannot drive normally. In severe cases, it will cause car crashes and major accidents. [0003] Generally, when a tire loses tire pressure, the tire will break away from the rim, and the thickened support structure of the tire wall will support the weight of the car after the tire is deflated. The reason is that special rubber components are added to the ...

AI Technical Summary

Problems solved by technology

[0004] But there is a problem in actual use: in order to achieve the purpose of support, the sidewall support rubber has a high hardness, and it is usually filled with carbon black. During normal use, the high hardness of the sidewall support rubber will affect the ride. driving comfort

However, when the tire is at zero air pressure, the support rubber is relatively heat-generating due to the formula, and the support rubber is easy to break and damage during use.

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