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A wide temperature range damping material based on EPDM rubber and its preparation and application

A technology of EPDM rubber and damping materials, applied in the field of material chemistry, can solve the problems of limited use range, poor mechanical properties, difficult vulcanization of damping materials, etc., to improve processing and damping performance, simple processing and molding methods, physical and mechanical good performance

Active Publication Date: 2016-05-04
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the damping material produced by this technology has the advantages of low cost, wide application and good weather resistance, the damping material is difficult to vulcanize, has poor mechanical properties, and cannot be used at high temperatures; The reasonable collocation of EPDM adopts the technical means of under-vulcanization to improve the damping performance of EPDM. However, its damping value in the normal temperature range is low, which cannot meet the ambient temperature of the damping material; Chinese patent CN103254510A discloses a method for widening the damping temperature range of EPDM , that is, adding phenolic anti-aging agent and / or tackifying resin to the EPDM compound, the damping material presents two or three independent damping loss peaks at low and high temperatures, but there is a large gap between the two damping peaks Damping failure zone, its application at room temperature is limited
Ma Nan, Chen Biyan, etc. blended EPDM rubber / petroleum resin blends and nitrile rubber / phenolic resin blends to obtain new blends. The effective temperature range of the blends is relatively wide, but due to a large amount of With the addition of resin, the mechanical properties of the blend are greatly reduced, which limits its application range

Method used

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  • A wide temperature range damping material based on EPDM rubber and its preparation and application
  • A wide temperature range damping material based on EPDM rubber and its preparation and application
  • A wide temperature range damping material based on EPDM rubber and its preparation and application

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A preparation method of a wide temperature range damping material based on EPDM, comprising the following steps:

[0036](1) At 40°C, masticate 100g of EP6950 type EPDM rubber on an open mill for 5 minutes, then cover the rolls, add 3g of zinc oxide, 1g of stearic acid, 10g of N330 carbon black, 5g of white mineral oil, Dibenzothiazole disulfide 1g, dipentamethylenethiuram tetrasulfide 0.2g and sulfur 0.5g are prepared into EPDM rubber compound;

[0037] At 40°C, put 100g of ENR-25 epoxidized natural rubber into an open mixer for 5 minutes and masticate for 5 minutes, then cover the rolls, add 5g of zinc oxide, 2g of stearic acid, 1g of basic magnesium carbonate, and diphenyl disulfide 3g of thiazole and 8g of 2402 tert-butylphenol formaldehyde resin were mixed evenly to prepare ENR-25 type epoxidized natural rubber compound; 100g of ENR-50 type epoxidized natural rubber was put into an open mill for mastication 5 minutes, then cover with rollers, add 5g of zinc oxide,...

Embodiment 2

[0042] A preparation method of a wide temperature range damping material based on EPDM, comprising the following steps:

[0043] (1) At 50°C, masticate 100g of EP6950 type EPDM rubber on an open mill for 4 minutes, then roll it, add 4g of zinc oxide, 1.5g of stearic acid, 20g of N330 carbon black, and 6g of white mineral oil , 2 g of dibenzothiazole disulfide, 0.5 g of bispentamethylenethiuram tetrasulfide, and 1 g of sulfur are prepared into EPDM rubber compound;

[0044] At 50°C, put 100g of ENR-40 epoxidized natural rubber into an open mill for mastication for 4 minutes, then cover the rolls, add 5g of zinc oxide, 2g of stearic acid, 1.5g of basic magnesium carbonate, and disulfide Benzothiazole 2g and 6g of 2402 tert-butylphenol formaldehyde resin were mixed evenly to prepare ENR-40 type epoxidized natural rubber compound; put ENR-50 type epoxidized natural rubber 100g into the open mill Refined for 4 minutes, then covered with rollers, added 5g of zinc oxide, 2g of stear...

Embodiment 3

[0049] A preparation method of a wide temperature range damping material based on EPDM, comprising the following steps:

[0050] (1) At 80°C, masticate 100g of EP6950-type EPDM rubber on an open mill for 3 minutes, then roll it, add 5g of zinc oxide, 2g of stearic acid, 30g of N550 carbon black, 8g of white mineral oil, Dibenzothiazole disulfide 2g, dipentamethylene thiuram tetrasulfide 0.5g and sulfur 1.5g are prepared into EPDM rubber compound;

[0051] At 80°C, put 100g of ENR-40 epoxidized natural rubber into an open mill for mastication for 3 minutes, then cover the rolls, add 6g of zinc oxide, 2g of stearic acid, 1g of basic magnesium carbonate, and diphenyl disulfide 3g of thiazole and 10g of 2402 tert-butylphenol formaldehyde resin were mixed evenly to prepare ENR-40 type epoxidized natural rubber compound; 100g of ENR-75 type epoxidized natural rubber was put into an open mixer for mastication 3 minutes, then cover the roll, add 5g of zinc oxide, 2g of stearic acid, ...

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Abstract

The invention discloses a wide-temperature-range damping material based on ethylene-propylene-diene-terpolymer rubber as well as a preparation method and application of the damping material. The preparation method comprises the following steps: plastifying the ethylene-propylene-diene-terpolymer rubber and epoxidized natural rubber with different epoxidized degrees on an open mill at 40-100 DEG C respectively, performing roll covering, and adding an aid-vulcanizer for mixing; by weight parts, standing 50-80 parts of a ethylene-propylene-diene-terpolymer rubber compound and 10-30 parts of a rubber compound of the epoxidized natural rubber with different epoxidized degrees, and vulcanizing under certain conditions to obtain the wide-temperature-range damping material. The wide-temperature-range damping material prepared by adopting the method has good damping performance in relatively wide temperature range (-80 DEG C to 70 DEG C) and is relatively good in physical and mechanical properties, and industrialized production can be realized.

Description

technical field [0001] The invention belongs to the field of material chemistry, and in particular relates to a wide temperature range damping material based on EPDM rubber and its preparation and application. Background technique [0002] With the rapid development of modern industry, the hazards caused by mechanical vibration and noise are becoming more and more serious in engineering, and the threat of natural disasters such as earthquakes to the safety of people's lives and property is becoming more and more prominent. Shock and noise reduction technology is an urgent problem in today's society. One of the technical issues. Employing damping materials and techniques is one of the most effective ways to control vibration and noise. Polymer damping materials, especially rubber damping materials, have become the most studied and widely used damping materials due to their special viscoelasticity, which can produce large internal friction (ie high damping), light specific gr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/16C08L15/00C08L61/10C08K13/02C08K3/06C08K3/22C08K5/09C08K3/26C08K5/47C08K5/40C08K3/04
CPCC08L23/16C08L2205/03C08L2312/04C08L15/00C08L61/06C08K13/02C08K3/06C08K2003/2296C08K5/09C08K2003/267C08K5/47C08K5/40C08K3/04
Inventor 卢珣龙娟
Owner SOUTH CHINA UNIV OF TECH