Chemigum resisting dynamic ozone

Abstract

The invention relates to chemigum resisting dynamic ozone, prepared from the following components in parts: 20-50 parts of chemigum, 5-20 parts of poly(epichlorohydrin co oxirane), 5-10 parts of dioctyl phthalate, 10-40 parts of fast extruding carbon black, 20-35 parts of high-abrasion carbon black, 0.5-1.5 parts of age inhibitor DOPD, 0.5-2 parts of age inhibitor 4010NA, 0.5-2 parts of brimstone, 1-7 parts of lead tetraoxide, 0.5-2 parts of 1,2-hexylidene thiourea and 0.5-1.5 parts of tetramethylthiuram disulfide. By jointly using poly(epichlorohydrin co oxirane) and simultaneously adding the age inhibitor DOPD and the age inhibitor 4010NA, the invention greatly improves the performance of the chemigum for resisting static and dynamic ozone.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to dynamic ozone-resistant nitrile rubber. Background technique [0002] As a means of transportation for human beings, automobiles have been integrated into people's daily life, and it is particularly important to maintain the function of rubber pipes connecting automobile fuel systems, cooling systems, and heat dissipation systems. With the development of the automobile industry, the use environment of rubber hoses for automobiles is getting worse and worse. As rubber connecting hoses for automobiles, they will vibrate and stretch with the unevenness of the road conditions. Under normal circumstances, the static ozone resistance of nitrile rubber is acceptable. , but under the condition of bad road conditions, the automobile connecting pipe is in dynamic state, which requires the nitrile rubber to be resistant to dynamic ozone in addition to static ozone resistance, in an ozo...

AI Technical Summary

Problems solved by technology

Under normal circumstances, nitrile rubber is usually used as the inner layer of the hose because of its good oil resistance, but the two ends of the hose are directly in contact with the air. Once cracks are formed due to ozone, they will develop along the cracks to the inner wall of the hose, eventually leading to oil leakage The phenomenon occurs, and the pure nitrile rubber will crack within 24 hours under this condition.

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