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Method for preparing polypropylene foam material employing irradiation crosslinking technology

A technology for irradiating polypropylene and foaming materials, which is applied in the field of preparing polypropylene foaming materials, can solve the problems of poor foaming quality and high foaming temperature, and achieve easy foaming process, low foaming temperature, and high foaming efficiency. good quality effect

Active Publication Date: 2017-09-01
广州华大生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention belongs to the chemical foaming method, which also has the problems of high foaming temperature (above 160°C) and poor foaming quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Prepare the polypropylene foam material according to the following steps:

[0046] (1) Add polypropylene to xylene, heat to 50°C and stir until completely dissolved, add N-hexadecyl borate diethanolamine with a mass ratio of 3:1:80, fluorosilicon surface An emulsifier aqueous solution mixed with active agent and water, the mass ratio of polypropylene, N-hexadecyl borate diethanolamine ester, and fluorosilicon surfactant is 50:3:1, stir and emulsify at 50°C for 4 hours, stop After stirring, it was allowed to stand at room temperature for 12 hours, and the xylene was evaporated under reduced pressure to obtain a polypropylene emulsion;

[0047] (2) Add PETA dropwise to the polypropylene emulsion obtained in step (1) under stirring, the mass ratio of PETA to polypropylene emulsion is 1:30, continue to stir for 1 hour after the dropwise addition, stop stirring and leave it at room temperature for 12 hour to get the mixed emulsion, put the mixed emulsion into the irradiatio...

Embodiment 2

[0050] Prepare the polypropylene foam material according to the following steps:

[0051] (1) Add polypropylene to xylene, heat to 50°C and stir until completely dissolved, add N-hexadecyl borate diethanolamine with a mass ratio of 3:1:80, fluorosilicon surface An emulsifier aqueous solution mixed with active agent and water, the mass ratio of polypropylene, N-hexadecyl borate diethanolamine ester, and fluorosilicon surfactant is 50:3:1, stir and emulsify at 50°C for 4 hours, stop After stirring, it was allowed to stand at room temperature for 12 hours, and the xylene was evaporated under reduced pressure to obtain a polypropylene emulsion;

[0052] (2) Add PETA dropwise to the polypropylene emulsion obtained in step (1) under stirring, the mass ratio of PETA to polypropylene emulsion is 1:30, continue to stir for 1 hour after the dropwise addition, stop stirring and leave it at room temperature for 12 hour to get the mixed emulsion, put the mixed emulsion into the irradiatio...

Embodiment 3

[0055] Prepare the polypropylene foam material according to the following steps:

[0056] (1) Add polypropylene to xylene, heat to 50°C and stir until completely dissolved, add N-hexadecyl borate diethanolamine with a mass ratio of 3:1:80, fluorosilicon surface An emulsifier aqueous solution mixed with active agent and water, the mass ratio of polypropylene, N-hexadecyl borate diethanolamine ester, and fluorosilicon surfactant is 50:3:1, stir and emulsify at 50°C for 4 hours, stop After stirring, it was allowed to stand at room temperature for 12 hours, and the xylene was evaporated under reduced pressure to obtain a polypropylene emulsion;

[0057] (2) Add PETA dropwise to the polypropylene emulsion obtained in step (1) under stirring, the mass ratio of PETA to polypropylene emulsion is 1:30, continue to stir for 1 hour after the dropwise addition, stop stirring and leave it at room temperature for 12 hour to get the mixed emulsion, put the mixed emulsion into the irradiatio...

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PUM

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Abstract

The invention provides a method for preparing a polypropylene foam material employing an irradiation crosslinking technology. The method comprises the following steps of (1) adding polypropylene to xylene, heating the xylene, stirring until polypropylene is completely dissolved, dropwise adding an emulsifier water solution, stirring, emulsifying, stopping stirring, standing at a room temperature, carrying out vacuum evaporation to remove xylene, thereby obtaining a polypropylene emulsion; (2) dropwise adding an irradiation sensitizer to the polypropylene emulsion under agitation, further stirring after dropwise adding, stopping stirring, standing at the room temperature to obtain a mixed solution, loading the mixed emulsion into an irradiation tube, putting the irradiation tube into an irradiation device at 60 DEG C for irradiation to obtain irradiation polypropylene; and (3) melting and plasticizing the irradiation polypropylene, transferring the irradiation polypropylene into a charge hole of a co-rotating twin-screw extruder, and adding carbon dioxide to a gas injection port of the co-rotating twin-screw extruder for continuously extruding and foaming to obtain the polypropylene foam material. The polypropylene foam material with relatively good foam quality can be prepared, and the method has the advantages of relatively low energy consumption and relatively small pollution.

Description

technical field [0001] The invention relates to a method for preparing polypropylene foam material. Background technique [0002] my country is a developing country, facing huge development pressure, the continuous growth of population and economy and the improvement of people's living standards will inevitably lead to an increase in the growth rate of energy consumption. The reliance on high-carbon energy coal cannot be changed in the short term, coupled with the lack of technology and funds required for emission reduction, and the large scale of "transferred emissions" from developed countries as the "world factory" all determine China's Before 2020, reducing the total amount of greenhouse gas emissions is under enormous pressure, and developing a low-carbon economy with Chinese characteristics is the direction of my country's sustainable development strategy in the future. [0003] Future energy conservation and emission reduction will focus on the production of clean ene...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/24C08J9/12C08J3/11C08J3/07C08L23/12C08K5/55
CPCC08J3/07C08J3/11C08J3/24C08J9/122C08J2203/08C08J2323/12C08K5/55C08K2201/017C08L2201/02C08L2201/04C08L23/12
Inventor 万利秀邹伟权辜英杰彭志刚
Owner 广州华大生物科技有限公司
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