Ethylene-propylene-diene monomer composition

Abstract

The invention relates to an ethylene-propylene-diene monomer composition. The ethylene-propylene-diene monomer composition comprises the following components in parts by weight: 100 parts of ethylene-propylene-diene monomer, 100 to 160 parts of fast extrusion N 550, 10 to 40 parts of liquid petrolatum, 3 to 5 parts of magnesium oxide, 1 to 2 parts of antiager RD, 1 to 2 parts of antiager MB, 2 to 4 parts of polyethylene glycol, 1 to 5 parts of assistant crosslinker and 2 to 10 parts of bis (tert-butyl isopropyl peroxide) benzene. In the invention, a peroxide curing agent is utilized, a -C-C-bond can be formed on products in the cross-linking process, the bond energy is high, the heat and chemical stability is high, and the products have excellent heat oxygen heat aging resistant performance. The ethylene-propylene-diene monomer formula ensures that the retention rate of the tensile property (brute force and pull-apart extension) is more than 65% under the conditions of high temperature heat aging, therefore, the advantage of the formula on the heat aging resistant performance of the ethylene-propylene-diene monomer is better reflected.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a high-temperature-resistant EPDM composition. Background technique [0002] With the development of the automobile industry, the cabin body of the automobile engine is getting smaller and smaller, and the temperature of the cabin body is required to gradually increase. It plays a vital role in the radiator hose, which mainly plays a cooling role. It is used as this product High-quality rubber compounds have gradually attracted people's attention in their high temperature resistance. [0003] In the past, the radiator hose materials used in automobiles were generally aimed at long-term use at 135°C, up to 150°C, and the retention rate of product tensile properties (strength, elongation at break) was above 65%; The compactness leads to a rapid increase in the temperature near it, thereby increasing the resistance of the radiator hose material to 150°C for long-term use, up to 160-...

AI Technical Summary

Problems solved by technology

[0007] The existing formula uses a single anti-aging agent RD as the protection system. Although it can play a certain protective role, the effect will also decrease when the rubber needs to be exposed to a high temperature environment of 150°C for a long time.

[0008] The -S-S- bond formed by the sulfur vulcanization system is used in the existing formula, and the bond energy is low, which cannot meet the long-term use in a high temperature environment of 150°C

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