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Method for improving vulcanization characteristics of ethylene propylene diene monomer by composite lignin

A technology of EPDM rubber and vulcanization characteristics, applied in the field of rubber materials, can solve the problems of general performance of vulcanized EPDM rubber, unable to meet the needs of the market, and general vulcanization characteristics, so as to shorten the vulcanization induction period and improve the vulcanization. characteristics, the effect of increasing the vulcanization rate

Pending Publication Date: 2020-02-11
界首市鑫豪塑胶有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the high-temperature resistance performance of EPDM rubber, by carrying out vulcanization treatment to it in the prior art, the high-temperature resistance performance of the vulcanized EPDM rubber obtained is improved to a certain extent, but the EPDM in the prior art The vulcanization characteristics of rubber are average, and the performance of the vulcanized EPDM rubber produced is average, which cannot meet the needs of the market

Method used

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  • Method for improving vulcanization characteristics of ethylene propylene diene monomer by composite lignin
  • Method for improving vulcanization characteristics of ethylene propylene diene monomer by composite lignin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A method for compounding lignin to improve the vulcanization characteristics of EPDM rubber, comprising the following steps:

[0016] S1 Add EPDM rubber to the mixer for mixing treatment, then add carbon black, carbon free radical scavenger, stearic acid, after mixing evenly, the mixing time is 8min, and discharge , to obtain rubber compound; wherein, the mass ratio of carbon black and carbon free radical scavenger is 50:1, and the order of adding carbon black and carbon free radical scavenger is to add carbon black first, then cross 5min, then add carbon free radical Capture agent, described carbon black is N550 carbon black, described EPDM rubber and carbon black, stearic acid mixing mass ratio are 100:65:0.3, and DCPD content is 5% in described EPDM rubber;

[0017] Wherein, the carbon free radical scavenger is a hydroxylamine carbon free radical scavenger.

[0018] S2 Add the mixed rubber obtained in step S1 to the open mill, and then add accelerator, vulcanizing a...

Embodiment 2

[0023] A method for compounding lignin to improve the vulcanization characteristics of EPDM rubber, comprising the following steps:

[0024] S1 Add EPDM rubber to the mixer for mixing treatment, then add carbon black, carbon free radical scavenger, stearic acid, after mixing evenly, the mixing time is 10min, and discharge , to obtain rubber compound; wherein, the mass ratio of carbon black and carbon free radical scavenger is 55:1, and the order of adding carbon black and carbon free radical scavenger is to add carbon black first, then cross 6min, then add carbon free radical Capture agent, described carbon black is N550 carbon black, described EPDM rubber and carbon black, stearic acid mixing mass ratio are 100:65:0.5, and DCPD content is 6% in the described EPDM rubber;

[0025] Wherein, the carbon free radical scavenger is a hydroxylamine carbon free radical scavenger.

[0026] S2 Add the mixed rubber obtained in step S1 to the open mill, then add accelerator, vulcanizing ...

Embodiment 3

[0031] A method for compounding lignin to improve the vulcanization characteristics of EPDM rubber, comprising the following steps:

[0032] S1 Add EPDM rubber into the mixer for mixing treatment, then add carbon black, carbon free radical scavenger, stearic acid, after mixing evenly, the mixing time is 9min, and discharge , to obtain rubber compound; wherein, the mass ratio of carbon black and carbon free radical scavenger is 52:1, and the order of adding carbon black and carbon free radical scavenger is to add carbon black first, then cross 5.5min, then add carbon free radical Base capture agent, described carbon black is N550 carbon black, described EPDM rubber and carbon black, stearic acid mixing mass ratio are 100:65:0.4, and DCPD content is 5.5% in described EPDM rubber ;

[0033] Wherein, the carbon free radical scavenger is a hydroxylamine carbon free radical scavenger.

[0034] S2 Add the mixed rubber obtained in step S1 to the open mill, then add accelerator, vulc...

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Abstract

The invention discloses a method for improving the vulcanization characteristics of ethylene propylene diene monomer (EPDM) by composite lignin. The method includes the steps of: S1, adding EPDM intoa mixing mill for mixing treatment, then adding carbon black, a carbon free radical scavenger and stearic acid, mixing the substances uniformly, and then performing discharging to obtain a rubber compound; wherein the mass ratio of the carbon black to the carbon free radical scavenger is 50-55:1, in terms of the adding sequence of the carbon black and the carbon free radical scavenger, firstly carbon black is added, and 5-6min later, the carbon free radical scavenger is added; S2, adding the rubber compound obtained in S1 into an open mill, and then adding an accelerant, a vulcanizing agent and composite lignin to obtain a preliminary rubber; and S3, putting the preliminary rubber obtained in S2 into a vulcanizing machine for vulcanizing treatment. The EPDM prepared by the method providedby the invention can have greatly improved vulcanization characteristics and enhanced heat resistance.

Description

technical field [0001] The invention belongs to the technical field of rubber materials, and in particular relates to a method for compounding lignin to improve the vulcanization characteristics of EPDM rubber. Background technique [0002] Ethylene-propylene-diene rubber (EPDM) is basically a saturated rubber, the main chain is composed of chemically stable saturated hydrocarbons, but contains unsaturated double bonds in the side chains, no polar substituents in the molecule, and cohesive energy between molecules. Low, the molecular chain remains flexible in a wide temperature range, so it has unique properties. Under normal circumstances, ethylene-propylene rubber products can be used for a long time in an environment of 120°C, and the maximum service temperature is 150°C. When the temperature is higher than 150°C, ethylene-propylene rubber begins to decompose slowly. [0003] In order to improve the high-temperature resistance performance of EPDM rubber, by carrying out ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L97/00C08K13/02C08K3/04C08K5/09C08K3/06C08K5/39B29B7/28B29C35/02
CPCC08L23/16B29B7/28B29C35/02C08L2201/08C08L97/005C08K13/02C08K3/04C08K5/09C08K3/06C08K5/39
Inventor 肖殿业饶保东
Owner 界首市鑫豪塑胶有限公司
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