High-elongation rubber for joint and preparation method of high-elongation rubber

Abstract

The invention provides high-elongation rubber for a joint. The high-elongation rubber comprises the following components in parts by weight: 45-50 parts of ethylene propylene rubber, 30-45 parts of ethylene propylene diene monomer, 10-20 parts of liquid ethylene propylene rubber, 20-25 parts of zinc oxide, 50-55 parts of carbon black N330, 10-15 parts of paraffin oil 2280, 3.0-5.0 parts of an anti-aging agent and 2.0-7.0 parts of a vulcanizing agent. According to the invention, improvement is carried out on the basis of a common heat-resistant rubber formula, the liquid ethylene propylene rubber is added at the same time, and the loss of an anti-aging agent in the ethylene propylene rubber vulcanization process is changed through a correct anti-aging agent ratio, so that the anti-aging agent can inhibit the heat effect to the maximum extent, thereby maintaining the high elongation of the ethylene propylene rubber after aging and prolonging the service life of the rubber; and moreover, the rubber is not obviously changed after being aged for 800000 times of dynamic tests, that is, the rubber with high elongation is only gradually weakened by the elongation force instead of being directly applied to the stripping force under the same acting force, so that the aim of keeping the adhesive property unchanged after the rubber is aged can be achieved.

Description

technical field [0001] The invention relates to the technical field of ethylene-propylene rubber, in particular to a high-elongation rubber for joints. Background technique [0002] In view of the huge difference between the structure of the high-temperature-resistant conveyor belt and the ordinary conveyor belt, the sealing part of the high-heat-resistant conveyor belt joint cannot be treated in the same way as the ordinary conveyor belt. The rubber with the same vulcanization system as the covering rubber must be used as the transition layer to achieve adhesion However, it has been proved by experiments and actual use that the existing rubber is not enough to meet the application of the conveyor belt in a high-temperature environment, and the transition layer is very easy to fail in a long-term high-temperature environment, resulting in the seal and the underlying cloth layer being in a high-temperature environment. Adhesive failure occurs in advance, so as to maintain the...

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Problems solved by technology

[0002] In view of the huge difference between the structure of the high-temperature-resistant conveyor belt and the ordinary conveyor belt, the sealing part of the high-heat-resistant conveyor belt joint cannot be treated in the same way as the ordinary conveyor belt. The rubber with the same vulcanization system as the covering rubber must be used as the transition layer to achieve adhesion However, it has been proved by experiments and actual use that the existing rubber is not enough to meet the application of the conveyor belt in a high-temperature environment, and the transition layer is very easy to fail in a long-term high-temperature environment, resulting in the seal and the underlying cloth layer being in a high-temperature environment. Adhesive failure occurs in advance, so as to maintain the effectiveness of the transition layer in the high temperature environment, even under the premise of maintaining the effectiveness, the performance improvement is completed, so that the service life of the high heat-resistant conveyor belt seal and the high-heat resistant conveyor belt can be maintained unanimous

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