High-and-low-temperature-resistant anti-aging chloroprene rubber

Abstract

The invention provides high-temperature-resistant and low-temperature-resistant anti-aging chloroprene rubber, belonging to the technical field of rubber. The high-temperature-resistant and low-temperature-resistant anti-aging chloroprene rubber of the invention comprises the following components in parts by weight: 45 to 53 parts of chloroprene rubber, 5 to 8 parts of butyl rubber, 4 to 6 parts of polyether type polyurethane rubber, 4 to 5.4 parts of light magnesium oxide, 5 to 6 parts of white carbon black, 26 to 31 parts of carbon black, 6 to 8.5 parts of a plasticizer, 3 to 4.6 parts of octylated diphenylamine, 1 to 2.3 parts of cyclohexylthiophthalimide, 0.8 to 1.4 parts of zinc oxide, 0.5 to 0.8 part of tetramethylthiuram disulfide and 0.6 to 1.1 parts of ethylene thiourea. Since thebutyl rubber and the polyether type polyurethane rubber are added into chloroprene rubber, the glass transition temperature of a final rubber product is reduced, and the low temperature resistance ofthe final rubber product is improved; and the light magnesium oxide, the octylated diphenylamine and the cyclohexylthiophthalimide in an anti-aging system can effectively improve the anti-aging capability of the rubber.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a high and low temperature resistant anti-aging chloroprene rubber. Background technique [0002] Among the existing rubber materials, silicone rubber with excellent high and low temperature performance has low mechanical properties and difficult bonding, which limits its scope of use; while other rubber materials in the market have poor performance in wide temperature ranges, such as low temperature crystallization and hardening resulting in shearing. The cutting modulus increases sharply; the thermal stability at high temperature decreases, which cannot meet the requirements of wide temperature range. The Tg of butyl isoprene rubber can reach -104°C, the cold resistance is close to that of silicone rubber, and the mechanical properties are better than silicone rubber. [0003] With the rapid development of my country's civil aviation industry, the demand for civil aviation seal...

AI Technical Summary

Problems solved by technology

Although the oil resistance and high temperature resistance of the rubber have been improved, the low temperature resistance of the nitrile rubber in the patent is poor, and the preparation cost is high

The overall high and low temperature resistance is poor

Neoprene is widely used in the field of automobile production technology because of its good mechanical properties, but the neoprene in the prior art has limited low temperature resistance, cannot be used normally under low temperature conditions, and is easy to use at higher temperatures Ageing

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