Ultrahigh molecular weight ethylene propylene diene monomer rubber capable of being applied to damping product and mixing preparation method thereof

Abstract

The invention discloses ultra-high molecular weight ethylene propylene diene monomer capable of being applied to a damping product and a mixing preparation method thereof. The ethylene propylene dienemonomer rubber is composed of 100 parts of EPDM PX052, 2-5 parts of zinc oxide, 1-2 parts of stearic acid, 60-100 parts of a reinforcing filler, 40-60 parts of a plasticizer, 2-4 parts of an anti-aging agent and 4-6 parts of a vulcanizing agent. The mixing preparation method comprises the following steps: mixing all the raw materials in two sections by using 55L kneading machines, performing mixing at 140 DEG C in a first-section kneading machine, blanking by using an open mill, cooling, standing for 24 hours, and carrying out second-section mixing in a second-stage kneading machine at 95 DEGC, blanking by using an open mill, cooling, standing for 24 hours, and carrying out the next procedure. Compared with ENB, the third monomer VNB disclosed by the invention has the advantages of fewerbranched chains, regular space structure after vulcanization and lower heat generation in fatigue shock absorption, the service life of the damping product is prolonged, and a good shock absorption effect can be kept even under a high-temperature condition.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and in particular relates to an ultra-high molecular weight EPDM rubber which can be used in shock-absorbing products and a mixing preparation method thereof. Background technique [0002] In the current existing technology, the requirements for the temperature resistance of materials are getting higher and higher. The EPDM rubber currently used has a service temperature of -50°C to 130°C and a short-term heat resistance of 150°C. The temperature resistance of propylene rubber cannot meet the material requirements under high temperature conditions of 150°C to 170°C. The strength of the EPDM material in the prior art is low, and the strength at normal temperature can only reach 13MPa~14MPa, and the strength at 150℃~170℃ is lower, only 2MPa~3MPa, which cannot meet the high temperature requirements of the material . [0003] Today's shock-absorbing products have higher and higher require...

AI Technical Summary

Problems solved by technology

[0002] In the current existing technology, the requirements for the temperature resistance of materials are getting higher and higher. The EPDM rubber currently used has a service temperature of -50°C to 130°C and a short-term heat resistance of 150°C. The temperature resistance of propylene rubber cannot meet the material requirements under the high temperature state of 150 ° C ~ 170 ° C

The strength of the EPDM material in the prior art is low, and the strength at normal temperature can only reach 13MPa~14MPa, and the strength at 150℃~170℃ is even lower, only 2MPa~3MPa, which cannot meet the high temperature requirements of the material.

[0003] Today's shock-absorbing products have higher and higher requirements for rubber, requiring rubber to have higher viscous damping, which not only has higher energy consumption, but also needs to have two functions of shock isolation and damping to achieve the shock-absorbing effect. Significantly, the shock-absorbing performance of the EPDM rubber in the prior art has not yet reached the requirements for use