A kind of agricultural tire sidewall rubber filled with tire reclaimed rubber

Abstract

The invention discloses high-filling agricultural tire sidewall rubber containing TRR (tire reclaimed rubber). The high-filling agricultural tire sidewall rubber comprises raw materials in parts by mass as follows: 15-25 parts of 20# standard rubber, 15-25 parts of cis-butadiene rubber 9000, 10-30 parts of butadiene-styrene rubber 1502, 30-50 parts of TRR, 3.0-5.0 parts of zinc oxide, 2.0-4.0 parts of stearic acid, 1.5-2.5 parts of an anti-ageing agent 4020, 0.8-1.2 parts of an anti-ageing agent RD, 2.0-3.0 parts of protective wax, 20-30 parts of high-wear-resistant carbon black N330, 30-40 parts of universal carbon black, 3.5-4.5 parts of aromatic hydrocarbon oil, 2.5-3.5 parts of pine tar, 2.5-3.5 parts of coumarone, 1.4-1.8 parts of sulfur, 0.6-1.0 parts of an accelerator NOBS and 0.6-1.0 parts of a uniform dispersing agent MS. The cost of the prepared sidewall rubber is low, and no crack is formed and a specimen is intact after 90,000 times of yielding.

Description

technical field [0001] The invention relates to an agricultural tire side 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] A phenyl group is introduced into the side group of the SBR molecular main chain of styrene-butadiene rubber, and a vinyl side group is formed in the 1,2-structure of b...

AI Technical Summary

Problems solved by technology

[0003] A phenyl group is introduced into the side group of the SBR molecular main chain of styrene-butadiene rubber, and a vinyl side group is formed in the 1,2-structure of butadiene, which has large steric hindrance, poor molecular chain flexibility, narrow relative molecular chain distribution, and lack of low molecular weight. Level of plasticization, so poor processability

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.

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