Method for preparing silicon rubber inflatable bag material used for manufacturing engine heat-insulating layer

A technology of silicone rubber and thermal insulation layer is applied in the field of preparation of silicone rubber airbag materials, and can solve the problems of a large number of micropores, poor performance stability, and reduced thickness accuracy of green sheets in silicone rubber airbag materials.

Inactive Publication Date: 2015-10-28
ANQING SPECIAL RUBBER & PLASTIC PROD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing a silicone rubber airbag material used in the manufacture of an engine heat insulation layer, which solves the problems of a large number of micropores, poor performance stability, and decreased thickness precision of green sheets in the existing preparation method for the silicone rubber airbag material, so as to ensure improved Quality level of silicone rubber airbag material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Silicone rubber raw rubber, white carbon black, hydroxyl silicone oil, titanium dioxide, polyvinyl silicone oil, 2,5 dimethyl-2,5-bis(tert-butyl peroxide) hexane, iron oxide red in a certain formula by weight The sequence is: 100:40:5:10: 10:0.7:5.

[0020] Its preparation method, concrete steps are:

[0021] 1) Use an internal mixer to mix the silicone rubber airbag material, first add raw silicone rubber, refine for 1 minute, then add white carbon black, hydroxyl silicone oil, titanium dioxide, polyvinyl silicone oil, refine for 40 minutes, and finally add 2, 5 dimethyl-2,5-bis(tert-butylperoxy)hexane and iron oxide red, refining for 20 minutes;

[0022] 2) After the mixing is completed, store the rubber material for 24 hours, and then carry out vacuum mixing, the refining time is 20 minutes, and the temperature is ≤40°C;

[0023] 3) Put the rubber compound obtained in step 2) in the material cabin of the extruder, and carry out vacuum extrusion, and the number of e...

Embodiment 2

[0026] Silicone rubber raw rubber, white carbon black, hydroxyl silicone oil, titanium dioxide, polyvinyl silicone oil, 2,5 dimethyl-2,5-bis(tert-butyl peroxide) hexane, iron oxide red in a certain formula by weight The sequence is: 100:40:5:10: 10:0.7:5.

[0027] Its preparation method, concrete steps are:

[0028] 1) Use an internal mixer to mix the silicone rubber airbag material, first add raw silicone rubber, refine for 3 minutes, then add white carbon black, hydroxyl silicone oil, titanium dioxide, polyvinyl silicone oil, refine for 60 minutes, and finally add 2, 5 dimethyl-2,5-bis(tert-butylperoxy)hexane and iron oxide red, refining for 25 minutes;

[0029] 2) After the mixing is completed, store the rubber in the internal mixer for 48 hours, then carry out vacuum mixing, the refining time is 30 minutes, and the temperature is ≤40°C;

[0030] 3) Put the rubber material obtained in step 2) in the material cabin of the extruder, and carry out vacuum extrusion, and the n...

Embodiment 3

[0033] Silicone rubber raw rubber, white carbon black, hydroxyl silicone oil, titanium dioxide, polyvinyl silicone oil, 2,5 dimethyl-2,5-bis(tert-butyl peroxide) hexane, iron oxide red in a certain formula by weight The sequence is: 100:40:5:10: 10:0.7:5.

[0034] Its preparation method, concrete steps are:

[0035] 1) Use an internal mixer to mix the silicone rubber airbag material, first add raw silicone rubber, refine for 1min, and refine at a temperature of 50°C, then add white carbon black, hydroxyl silicone oil, titanium dioxide, and polyvinyl silicone oil, and refine Refining for 40 minutes at a refining temperature of 50°C, and finally adding 2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane and red iron oxide, refining for 20 minutes at a refining temperature of 40°C;

[0036] 2) After mixing, store the rubber material for 24 hours, and then carry out vacuum mixing. The refining time is 20 minutes, the temperature is ≤40 °C, and the vacuum degree in the internal mixer is ...

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PUM

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Abstract

The invention provides a method for preparing the silicon rubber inflatable bag material used for manufacturing an engine heat-insulating layer. Firstly, the crude rubber of the silicone rubber, the white carbon black, a constitution controlling agent, a heat-resistant additive, a strengthening agent, a vulcanizing agent and a coloring agent are successively added and compounded. After the compounding process, the rubber compound is stored for 24-48 hours and then compounded in the vacuum state. Finally, the obtained rubber compound is placed in a material cabin of an extruder to be extruded in the vacuum state. In this way, the material is prepared. The interior of the material prepared by the above method is free of any air defect and the density of the material can be improved to be 1.59-1.60 g/cm<3>. In this way, the adverse effect of air holes is thoroughly eliminated. The thickness deviation of the material is further reduced. The molded surfaces of silicon rubber inflatable bags prepared by the above material are stable in quality.

Description

technical field [0001] The invention belongs to the technical field of engine heat insulation layer preparation, and in particular relates to a preparation method of a silicon rubber airbag material used for the manufacture of engine heat insulation layer. Background technique [0002] Silicone rubber material is currently the most widely used special rubber material. Because of its high temperature resistance and corrosion resistance, it is widely used in sealing structural parts in high temperature environments and organic solvent medium environments. It has good high and low temperature performance, solvent resistance, and heat resistance. The advantage of high oxygen aging resistance. The traditional method of preparing silicone rubber materials is the mixing process of the open mill, that is, adding raw rubber, reinforcing fillers, vulcanizing agents (or not) and other additives into the open mill, and then mixing to form a compound rubber. , and then adjust the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08L83/06C08L83/07C08K13/02C08K3/22C08K5/14C08K3/36B29B7/74B29C47/00
Inventor 马自坤朱稼麟杨瑞楼祝世杰焦士六鲍明生周芬余向东张建华王菲孙丽娜王晓倩喻尧赵劲松
Owner ANQING SPECIAL RUBBER & PLASTIC PROD
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