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Silicon rubber/ethylene propylene terpolymer blending material and processing method

A technology of EPDM rubber and silicone rubber raw rubber, which is applied in the field of rubber processing, can solve the problem of fast vulcanization speed of silicone rubber components, slow vulcanization speed of EPDM rubber components, vulcanized silicone rubber/EPDM Problems such as poor mechanical properties of rubber blending and use of rubber, to achieve the effect of improving physical and mechanical properties, low production cost, and stable quality

Inactive Publication Date: 2012-11-14
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to solve the problem that when vulcanizing silicone rubber / EPDM rubber with a peroxide vulcanizing agent and blending glue, the silicone rubber component vulcanization speed is fast, and the EPDM rubber component vulcanization speed is slow, and the two cannot produce The problem of poor mechanical properties of vulcanized silicone rubber / EPDM blended rubber caused by co-crosslinking provides a co-vulcanized silicone rubber / EPDM blend and its processing method, specifically The technical solution is as follows

Method used

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  • Silicon rubber/ethylene propylene terpolymer blending material and processing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw material components and parts by mass of the silicone rubber / EPDM blend are as follows:

[0025] EPDM raw rubber EP T6250 60 parts

[0026] Methyl vinyl silicone rubber FLJ6051 / 2 40 parts

[0027] Dicumyl peroxide 1.5 parts

[0028] Diphenylmethane bismaleimide 1.0 parts

[0029] γ-(Methacryloyloxy)propyltrimethoxysilane 1.0 parts

[0030] Precipitated white carbon black 40 parts

[0031] Zinc oxide 5.0 parts

[0032] Paraffin oil 6.0 parts

[0033] The preparation method is as follows: control the roll temperature of the mill at 60°C, adjust the roll distance to 2mm, add 60 parts of EPDM rubber to cover the roll, then add zinc oxide, 20 parts of white carbon black, paraffin oil and γ-( Methacryloyloxy)propyltrimethoxysilane, mixed evenly and released into tablets for use. Roll the silicone rubber on the open mill, add the remaining white carbon black, mix evenly, and then release the sheet. Then wrap the filled EPDM rubber again, gradually add small pie...

Embodiment 2

[0035] The raw material components and parts by mass of the silicone rubber / EPDM blend are as follows:

[0036] EPDM raw rubber EP T6250 60 parts

[0037] Methyl vinyl silicone rubber FLJ6051 / 2 40 parts

[0038] Dicumyl peroxide 1.5 parts

[0039] Diphenylmethane bismaleimide 1.5 parts

[0040] γ-(Methacryloyloxy)propyltrimethoxysilane 1.0 parts

[0041] Precipitated white carbon black 40 parts

[0042] Zinc oxide 5.0 parts

[0043] Paraffin oil 6.0 parts

[0044] The preparation method is as follows: control the roll temperature of the mill at 60°C, adjust the roll distance to 2mm, add 60 parts of EPDM rubber to cover the roll, then add zinc oxide, 20 parts of white carbon black, paraffin oil and γ-( Methacryloyloxy)propyltrimethoxysilane, mixed evenly and released into tablets for use. Roll the silicone rubber on the open mill, add the remaining white carbon black, mix evenly, and then release the sheet. Then wrap the filled EPDM rubber again, gradually add small pie...

Embodiment 3

[0046] The raw material components and parts by mass of the silicone rubber / EPDM blend are as follows:

[0047] EPDM raw rubber EP T6250 60 parts

[0048] Methyl vinyl silicone rubber FLJ6051 / 2 40 parts

[0049] Dicumyl peroxide 1.5 parts

[0050] Diphenylmethane bismaleimide 2.0 parts

[0051] γ-(Methacryloyloxy)propyltrimethoxysilane 1.0 parts

[0052] Precipitated white carbon black 40 parts

[0053] Zinc oxide 5.0 parts

[0054] Paraffin oil 6.0 parts

[0055] The preparation method is as follows: control the roll temperature of the mill at 60°C, adjust the roll distance to 2mm, add 60 parts of EPDM rubber to cover the roll, then add zinc oxide, 20 parts of white carbon black, paraffin oil and γ-( Methacryloyloxy)propyltrimethoxysilane, mixed evenly and released into tablets for use. Roll the silicone rubber on the open mill, add the remaining white carbon black, mix evenly, and then release the sheet. Then wrap the filled EPDM rubber again, gradually add small piece...

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Abstract

The invention discloses a silicon rubber / ethylene propylene terpolymer blending material and a processing method of the silicon rubber / ethylene propylene terpolymer blending material. The silicon rubber / ethylene propylene terpolymer blending material comprises silicon rubber raw rubber, ethylene propylene terpolymer raw rubber, diphenylmethane bismaleimide and an organic peroxide vulcanizing agent. In the silicon rubber / ethylene propylene terpolymer blending material vulcanized by peroxide, the vulcanizing speed of the ethylene propylene terpolymer component is improved by diphenylmethane bismaleimide, so that the vulcanizing speed of the ethylene propylene terpolymer component and the vulcanizing speed of the silicon rubber component trend to be close, and the purpose of co-vulcanization of all rubber components can be achieved. According to the invention, the silicon rubber / ethylene propylene terpolymer blending material is mixed and processed by an open two-roll rubber mixing mill and a sealed rubber mixing mill, and the rubber compound containing diphenylmethane bismaleimide is heated and vulcanized to obtain the silicon rubber / ethylene propylene terpolymer rubber compound with excellent properties.

Description

technical field [0001] The invention relates to the technical field of rubber processing, in particular to a silicone rubber / EPDM blend and a processing method thereof. Background technique [0002] Both silicone rubber and EPDM rubber have excellent anti-aging properties such as thermal oxygen resistance, ultraviolet resistance, and ozone resistance, but the melt strength of silicone rubber is low, it is difficult to extrude thin-walled products, and the mechanical properties of vulcanized rubber are poor; Ethylene-propylene rubber has good mechanical properties, but the melt viscosity is high, the vulcanization speed is slow, and the mixing process performance is not good. Blending silicone rubber and EPDM rubber together can give full play to their respective strengths, overcome their respective shortcomings, and make products with better overall performance than a single type of rubber. [0003] The key to rubber blending is not only to disperse the components of the bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L83/07C08K13/02C08K5/3415C08K5/14C08K3/36C08K3/22B29C35/02
Inventor 李建雄李远刘安华游长江
Owner SOUTH CHINA UNIV OF TECH
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