Agricultural tire crown compound of high filling tire reclaimed rubber

Abstract

The invention discloses an agricultural tire crown compound of high filling tire reclaimed rubber. The agricultural tire crown compound is prepared from the following raw materials in parts by mass: 25 to 35 parts of standard rubber No.20; 15 to 25 parts of cis-butadiene rubber 9000; 10 to 50 parts of butadiene-styrene rubber 1502; 70 to 30 parts of tire reclaimed rubber; 3.0 to 5.0 parts of zinc oxide; 2.0 to 4.0 parts of stearic acid; 0.5 to 0.7 part of anti-aging agent BLE; 0.8 to 1.0 part of anti-aging agent RD; 1.5 to 2.5 parts of anti-aging agent 4020; 2.0 to 3.0 parts of protective wax; 55 to 65 parts of intermediate super carbon black N220; 9.0 to 12 parts of aromatic hydrocarbon oil; 1.5 to 2.5 parts of sulfur; 1.1 to 1.3 parts of accelerant NOBS; 1.0 to 2.0 parts of thermal oxidation resistant agent RF; 1.0 to 2.0 parts of homogenizing dispersant MS. The agricultural tire crown compound has the advantages that the processability of low-temperature emulsion aggregation of SBR (styrene butadiene rubber) is improved, resource recycling is realized, pollution is reduced, the environment is protected, and the production cost is reduced, etc.

Description

technical field [0001] The invention relates to an agricultural tire crown rubber highly filled with tire reclaimed rubber, which belongs to the field of tire manufacturing. Background technique [0002] China is not only a big importer of rubber, but also a big producer of waste rubber. The total amount of scrap tires is very large every year. The disposal of scrap tires has become a recognized international problem, and China is no exception. As a good way of waste utilization, recycled rubber is one of the effective ways to solve the problem of tire recycling in China. After process processing, tire reclaimed rubber is produced and put into the production of new products, so that rubber resources can be fully and reasonably recycled, which is a good way to deal with resources and the environment. [0003] The amount of low-temperature emulsion poly-SBR used in tire crown rubber is relatively large, but phenyl groups are introduced into the side groups of the main chain ...

AI Technical Summary

Problems solved by technology

[0003] The amount of low-temperature emulsion poly-SBR used in tire crown rubber is relatively large, but phenyl groups are introduced into the side groups of the main chain of low-temperature emulsion poly-SBR molecules, and vinyl side groups are formed in the 1,2-structure of butadiene, resulting in large steric hindrance , poor flexibility of molecular chains, narrow distribution of relative molecular chains, lack of low-molecular-level plasticization, so processing performance is poor

The specific manifestations are poor wettability to the compounding agent during mixing, rapid temperature rise, and large equipment load; large shrinkage of the rubber during calendering; difficult operation during extrusion, large expansion rate of semi-finished products; poor self-adhesiveness during molding

Agricultural tires use a large amount of tread. If the rubber material heats up quickly and the mixing time is long, not only the rubber material is easy to scorch, but also the power of the equipment is large and many other problems.

In addition, the use of a relatively high amount of SBR in agricultural crown rubber makes the cost of crown rubber too high, which is not conducive to the development of enterprises and the use of consumers

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