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

An EPDM rubber and ultra-high molecular weight technology, which is applied in the field of polymer materials, can solve the problem that the temperature resistance of EPDM rubber cannot be met, the shock absorption performance cannot meet the use requirements, and the high temperature requirements of materials cannot be met, etc. problem, to achieve the effect of reducing material cost, good pressure change, and less branched chain

Inactive Publication Date: 2020-03-10
上海正村橡塑工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] The invention also discloses a mixing preparation method of ultra-high molecular weight EPDM rubber that can be applied in shock absorbing products. The mixing preparation method specifically includes the following steps:

[0018] (1) Mix all the raw materials EPDM PX052, zinc oxide, stearic acid, reinforcing filler, plasticizer, anti-aging agent and vulcanizing agent in two stages with a 55L kneader, and one stage with a kneader Set the debinding temperature to 140°C, then go through the steps of unloading and cooling in the open mill, and after parking for 24 hours, carry out the second-stage mixing;

[0019] (2) The mixing and debinding temperature of the second-stage kneader is set to 95°C. After the unloading and cooling steps of the open mill, it is parked for 24 hours before entering the next process for use.

[0020] The performance test results of the finished product are: take the qualified mixed rubber after parking, vulcanize the test piece and test it, the ...

Embodiment 1

[0021] Example 1: Application of a kind of ultra-high molecular weight EPDM rubber in shock absorbing material for compressors:

[0022] The formula of the ultra-high molecular weight EPDM rubber is as follows: 100 parts of EPDM PX052, 5 parts of zinc oxide, 1 part of stearic acid, 110 parts of reinforcing filler, 85 parts of plasticizer, 4 parts of anti-aging agent 8 parts and vulcanizing agent.

[0023] The performance test results of the finished product are: physical properties of the rubber material: tensile strength 18.1MPa; elongation 720%; hardness 41; After 120 hours, the physical properties of the material changed as follows: hardness +7, strength -9%, elongation -19%.

[0024] The ultra-high molecular weight EPDM rubber in the present invention is used in the shock absorbing material of the compressor. After 18 months of use, the shock pad has not been damaged yet, and the compressor has not been damaged due to poor shock absorption.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08K13/02C08K3/22C08K5/09
CPCC08K3/22C08K5/09C08K13/02C08K2003/2296C08L2201/08C08L23/16
Inventor 姜锐
Owner 上海正村橡塑工业有限公司
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