Tire inner tube rubber composition

Abstract

The invention relates to the technical field of rubber, particularly a tire inner tube rubber composition which comprises the following components in parts by weight: 35-45 parts of natural rubber, 50-70 parts of outer tube regenerated rubber, 50-70 parts of brominated butyl regenerated rubber, 10-20 parts of carbon black N660, 10-20 parts of StronWiNTC, 1-2 parts of aromatic oil, 2-5 parts of stearic acid, 1-2 parts of anti-aging agent 4020, 1-2 parts of anti-aging agent RD, 1-2 parts of protective wax OK5194, 3-4 parts of rubber tackifying resin A-90, 5 parts of zinc oxide, 0.3-0.5 part of accelerator DM, 0.5-1.0 part of accelerator CZ and 2-3 parts of sulfur. The inner tube produced from the composition provided by the invention has the advantages of favorable gas retention performance, favorable aging resistance, high load carrying behavior, favorable processability and low cost.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a tire inner tube rubber composition. Background technique [0002] As we all know, in recent years, with the improvement of road conditions in our country and the development of expressways, the speed of automobiles has increased significantly, and the phenomenon of overloading is common, which makes the temperature of tires continue to rise, and the temperature of inner tubes can reach 100-120 ° C. NR inner tube It can no longer adapt to such high-speed, overloaded, long-distance use conditions, and users have put forward higher requirements for inner tubes with high temperature resistance and long-term stable pressure-holding operation. Compared with NR inner tubes, IIR inner tubes have excellent air tightness, good heat resistance and ozone resistance, and their quality is far superior to NR inner tubes. The developed countries in the world have basically realized the butyliz...

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Problems solved by technology

[0002] As we all know, in recent years, with the improvement of road conditions in our country and the development of expressways, the driving speed of automobiles has increased significantly, and the phenomenon of overloading is common, which makes the temperature of tires continue to rise, and the temperature of inner tubes can reach 100-120 °C. It can no longer adapt to such high-speed, overloaded, long-distance and other operating conditions. Users have put forward higher requirements for inner tubes with high temperature resistance and long-term stable pressure-holding operation.

Compared with NR inner tubes, IIR inner tubes have excellent air tightness, good heat resistance and ozone resistance, and their quality is far superior to NR inner tubes. The developed countries in the world have basically realized the butylization of inner tubes; but all IIR inner tubes are in use The inner tube will become soft, stick to the outer tire, and become larger in size, making it easy to pleat when used again. In order to improve the performance of the IIR inner tube, a combination of EPDM and IIR was developed to produce the inner tube. The quality is good, but the cost is still relatively high. The load-bearing performance Difference

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