Encapsulation sleeve prepared by compounding butyl rubber and ethylene-propylene-diene monomer, and preparation method thereof

A technology of EPDM rubber and butyl rubber, which is applied in the field of envelopes, can solve the problems of poor high temperature resistance of envelopes, the inability to tightly wrap tires, and affect the quality of retreaded tires, so as to achieve long service life and improve permanent deformation. , Improve the effect of a large decline in performance

Inactive Publication Date: 2020-05-08
山东海益橡胶科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high temperature resistance of the envelope made of butyl rubber using the sulfur vulcanization system is not as good as that of ACM rubber, because the envelope needs to be repeatedly vulcanized in the vulcanization tank to cover the tire, and the butyl rubber will age and performance decay after repeated use at high temperature for a long time , the elongation rate is shortened sharply, resulting in easy damage, and the service life is not as good as the envelope of ACM rubber base material; the state of butyl rubber after aging is softening, and the permanent deformation increases after long-term use. The retreaded tire is tightly wrapped, and the sealing effect becomes poor, which affects the quality of the retreaded tire

Method used

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  • Encapsulation sleeve prepared by compounding butyl rubber and ethylene-propylene-diene monomer, and preparation method thereof
  • Encapsulation sleeve prepared by compounding butyl rubber and ethylene-propylene-diene monomer, and preparation method thereof
  • Encapsulation sleeve prepared by compounding butyl rubber and ethylene-propylene-diene monomer, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] serial number components Dosage / serving 1 IIR268 90 2 EPDM J2070 10 3 Carbon black N774 30 4 Silica Zeosil175GR 30 5 Paraffin oil KP6030 15 6 Silane coupling agent Si-69 1.5 7 Zinc oxide 5 8 stearic acid 1 9 Antiaging agent RD 1.5 10 Antiager MB 1 11 Leveler Struktol 40MS Flakes 5 12 Processing aid WB42 1.5 13 Processing aid WB16 1.5 14 sulfur 1.8 15 Accelerator TMTD 0.5 16 Accelerator MBTS 1.5 17 Accelerator ZDBC 1 18 Accelerator DTDM 0

[0042] The preparation method of described envelope, comprises the following steps:

[0043] (1) Raw rubber pre-plasticizing: Put the raw rubber into the internal mixer to break the rubber and pre-plasticize for 30S;

[0044] (2) Adding auxiliary materials: adding all materials except vulcanizing agents and accelerators, such as fillers, plasticizers, processing aids, active agents, anti-aging a...

Embodiment 2

[0062]

[0063]

[0064] The preparation method is the same as in Example 1.

[0065] For the prepared envelope, the relevant performance test was carried out with reference to the national standard, and the results were as follows:

[0066] Hardness 55°;

[0067] Tensile strength 10.7MPa;

[0068] Elongation 626%;

[0069] Tear strength 35.8kN / m;

[0070] After aging at 125℃*72H:

[0071] Hardness 56°;

[0072] Tensile strength 9.8MPa;

[0073] Elongation 490%;

[0074] The life test of the product made into an envelope: 262 times.

Embodiment 3

[0076]

[0077]

[0078] The preparation method is the same as in Example 1.

[0079] For the prepared envelope, the relevant performance test was carried out with reference to the national standard, and the results were as follows:

[0080] Hardness 56°;

[0081] Tensile strength 11MPa;

[0082] Elongation 612%;

[0083] Tear strength 33.5kN / m;

[0084] After aging at 125℃*72H:

[0085] Hardness 57°;

[0086] Tensile strength 10.3MPa;

[0087] Elongation 478%;

[0088] The life test of the product made into an envelope: 245 times.

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Abstract

The invention relates to an encapsulation sleeve prepared by compounding butyl rubber and ethylene-propylene-diene monomer, and a preparation method thereof, and belongs to the technical field of encapsulation sleeves. The encapsulation sleeve is prepared from 50-100 parts of IIR 268, 5-50 parts of EPDM J2070, 10-50 parts of carbon black, 10-50 parts of white carbon black, 5-30 parts of paraffin oil, 0.2-3 parts of a silane coupling agent, 1-10 parts of zinc oxide, 0.5-2 parts of stearic acid, 2-6 parts of an anti-aging agent, 3-10 parts of a homogenizing agent, 2-6 parts of a processing aid,1-3 parts of sulfur, 0.1-1.5 parts of an accelerant TMTD, 1-3 parts of an accelerant MBT, 1-3 parts of an accelerant ZDBC and 0-2 parts of an accelerant DTDM. The encapsulation sleeve has excellent thermo-oxidative aging resistance, excellent mechanical properties and longer service life. The invention also provides a simple preparation method.

Description

technical field [0001] The invention relates to an envelope sleeve prepared by compounding butyl rubber and EPDM rubber and a preparation method thereof, belonging to the technical field of envelope sleeves. Background technique [0002] The envelope is a special rubber sheath for tire retreading, which can be used repeatedly and is also a consumable item. Tire retreading is to improve the comprehensive utilization of resources, repair old waste and reduce environmental pollution. The recycling and utilization of waste tires is the extension and processing and reuse of the tire industry, which promotes the comprehensive utilization of resource conservation. Due to safety and other reasons, the carcass life of motor vehicle tires is much longer than the tread life (for example, the carcass life of aircraft tires is about 6 times the tread life, trucks are about 3 times, and cars are about 1 time), so motor vehicles use tires must be retreaded several times to complete their...

Claims

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Application Information

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IPC IPC(8): C08L23/22C08L23/16C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09C08K3/06
CPCC08K2003/2296C08L23/22C08L2201/08C08L23/16C08K13/02C08K3/04C08K3/36C08K3/22C08K5/09C08K3/06
Inventor 彭世洪李梦雪
Owner 山东海益橡胶科技有限公司
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