Oil-free environment-friendly reclaimed rubber and preparation method thereof

Abstract

The invention discloses an oil-free environment-friendly reclaimed rubber and a preparation method thereof. The reclaimed rubber comprises the following components in parts by weight: 100 parts of load-carrying tire surface rubber powder, 3 to 5 parts of alkyl amino carboxylate type activator, 0.5 to 1.5 parts of silane coupling agent, 5 to 100 parts of water, 3 to 5 parts of liquid polyisoprene rubber, and 1 to 3 parts of phenol or amine type antioxidant. The preparation method comprises the following steps: adding load-carrying tire surface rubber powder, alkyl amino carboxylate type activator, silane coupling agent, and water into a high temperature dynamic reactor; carrying out regeneration under preset conditions, after regeneration, cooling, reducing pressure, discharging products; drying the discharged rubber powder; then adding liquid polyisoprene rubber and phenol or amine type antioxidant, evenly mixing, allowing the mixture to stand still for a while, adding the rubber powder into an open mill, processing the rubber powder for a while, and batching out the rubber powder to obtain high-strength oil-free environment-friendly reclaimed rubber. The provided preparation method radically reduces the odor of reclaimed rubber. The obtained reclaimed rubber and products of reclaimed rubber are nearly odorless, and only have the smell of rubber hydrocarbon.

Description

technical field [0001] The invention belongs to the field of waste rubber recycling, and in particular relates to a production method of high-strength, oil-free and environment-friendly regenerated rubber. Background technique [0002] Reclaimed rubber is generally polluted, has a strong smell, and is harmful to the human body and the environment. During the production, storage and use of conventional reclaimed rubber, a large amount of harmful substances such as polycyclic aromatic hydrocarbons, hexavalent chromium, polybrominated biphenyls, and heavy metals will be released, which not only smells bad And pollution is bad for human body and environment. Some odorless reclaimed rubber uses the addition of fragrances and essences, which actually only play a covering role, but does not eliminate harmful substances in the reclaimed rubber; reaction, this method has defects such as incomplete deodorization, increased production cost of reclaimed rubber, and the problem of pollu...

AI Technical Summary

Problems solved by technology

[0002] Reclaimed rubber is generally polluted, has a strong smell, and is harmful to the human body and the environment. During the production, storage and use of conventional reclaimed rubber, a large amount of harmful substances such as polycyclic aromatic hydrocarbons, hexavalent chromium, polybrominated biphenyls, and heavy metals will be released, which not only smells bad Pollution is harmful to human body and environment

Some odorless reclaimed rubber uses the addition of fragrances and essences, which actually only play a covering role, but does not eliminate harmful substances in the reclaimed rubber; reaction, this method has defects such as incomplete deodorization and increased production cost of reclaimed rubber, and the problem of pollution still exists

[0003] The main reason for the heavy smell of reclaimed rubber is the softener added during the regeneration process. Although the use of polluting softeners such as coal tar with high pollution and heavy odor has been banned, the use of aromatic oils and environmental protection oils used to replace coal tar Softeners such as paraffin oil also contain a large amount of polycyclic aromatic hydrocarbons. Although the degree of pollution has been reduced, the problem of pollution and odor has not been solved from the root

Recently, the popular environment-friendly vegetable oil softener uses pure plant or biological components. Although the pollution and odor problems are alleviated, it has the disadvantages of poor mechanical properties and high product cost.