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Nanometer silicon dioxide reinforcing and toughening master batch and preparation method thereof

A nano-silica, reinforcement and toughening technology, applied in the field of plastic modification, can solve the problems of lower polyethylene performance, high surface energy, and easy aggregation of nanoparticles, so as to increase compatibility and improve modification effect Effect

Inactive Publication Date: 2022-05-27
山东捷茂新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nano-silica particles have a huge specific surface area and high surface energy, and the nanoparticles are easy to agglomerate, making it difficult to disperse well in polyethylene
Moreover, nano-silica has strong polarity, while polyethylene is a non-polar polymer material, and the compatibility between the two is very poor.
These factors not only cannot exert the effect of nano-silica modified polyethylene, but may reduce the performance of polyethylene

Method used

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  • Nanometer silicon dioxide reinforcing and toughening master batch and preparation method thereof
  • Nanometer silicon dioxide reinforcing and toughening master batch and preparation method thereof
  • Nanometer silicon dioxide reinforcing and toughening master batch and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] 1. Turn on the co-rotating parallel twin-screw extruder for heating. The heating temperature of each temperature zone is as follows:

[0014]

[0015] 2. Clean up the high-speed mixer, and weigh 0.7 parts of zinc stearate, 0.5 parts of coupling agent, 20 parts of nano-silicon dioxide, 74 parts of polyethylene, and 5 parts of magnesium hydroxystearate according to the formula. , first add the coupling agent and nano-silica into the high-speed mixer, first stir at low speed for 6 to 8 minutes, and then use high-speed stirring to 70℃-80℃, so that the coupling agent evenly coats the nano-silica, and then Add the remaining materials to the high-speed mixer and mix at high speed for 15 minutes to fully mix the materials evenly.

[0016] 3. When the temperature rises to the temperature in the above table, add the stirred raw materials into the feeding hopper of the co-rotating parallel twin-screw extruder, turn on the oil pump, water pump, vacuum pump, blow dryer, and pelle...

Embodiment 2

[0018] 1. Turn on the twin-screw extruder for heating. The heating temperature of each temperature zone is as follows:

[0019]

[0020] 2. Clean up the high-speed mixer, and weigh 1 part of zinc stearate, 0.8 part of coupling agent, 25 parts of nano-silicon dioxide, 67.2 parts of polyethylene, and 6 parts of magnesium hydroxystearate according to the formula. , First add the coupling agent and nano-silica into the high-speed mixer, first stir at low speed for 6 to 8 minutes, and then use high-speed stirring to 70-80 ℃, so that the coupling agent evenly coats the nano-silica. Then add the remaining materials together into the high-speed mixer and stir at a high speed for 15 minutes to fully mix the materials evenly.

[0021] 3. When the temperature rises to the temperature in the above table, add the stirred raw materials into the feeding hopper of the co-rotating parallel twin-screw extruder, turn on the oil pump, water pump, vacuum pump, blow dryer, and pelletizer in turn...

Embodiment 3

[0023] 1. Turn on the twin-screw extruder for heating. The heating temperature of each temperature zone is as follows:

[0024]

[0025] 2. Clean up the high-speed mixer, and weigh 1 part of zinc stearate, 0.9 part of coupling agent, 30 parts of nano-silicon dioxide, 62.1 parts of polyethylene, and 6 parts of magnesium hydroxystearate according to the formula. , First add the coupling agent and nano-silica into the high-speed mixer, first stir at low speed for 6 to 8 minutes, and then use high-speed stirring to 70-80 ℃, so that the coupling agent evenly coats the nano-silica. Then add the remaining materials together into the high-speed mixer and stir at a high speed for 17 minutes to fully mix the materials evenly.

[0026] 3. When the temperature rises to the temperature in the above table, add the stirred raw materials into the feeding hopper of the co-rotating parallel twin-screw extruder, turn on the oil pump, water pump, vacuum pump, blow dryer, and pelletizer in turn...

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Abstract

The invention discloses a nano-silica reinforced and toughened master batch and a preparation method thereof, and relates to the technical field of plastic modification, the nano-silica reinforced and toughened master batch can solve the problems of dispersibility of nano-silica and compatibility with polyethylene, and the nano-silica reinforced and toughened master batch is prepared by the following steps: adding a coupling agent and nano-silica in proportion into a high-speed mixer for stirring; the preparation method comprises the following steps: adding a silane coupling agent into a high-speed mixer, fully coating the surface of nano silicon dioxide with the coupling agent, proportionally adding a lubricant, a dispersant and polyethylene into the high-speed mixer, carrying out high-speed stirring until the materials are fully and uniformly mixed, and carrying out extrusion granulation through a co-rotating parallel twin-screw extruder, the modified magnesium hydroxystearate is added into the polyethylene to play a role of a link, the compatibility of the nano silicon dioxide and the polyethylene is increased, the modified magnesium hydroxystearate and the reasonable screw combination can effectively open nano silicon dioxide aggregates, so that the nano silicon dioxide aggregates can be well dispersed in the polyethylene, and the modification effect of the nano silicon dioxide is effectively improved.

Description

technical field [0001] The invention relates to the technical field of plastic modification, in particular to a nano-silica reinforced and toughened master batch and a preparation method. Background technique [0002] Polyethylene is a crystalline polymer material with a wide range of uses. It has excellent low temperature resistance, good chemical stability, excellent electrical insulation, and good molding process. It can be used in injection molding, extrusion, blow molding and other industries. However, polyethylene also has many shortcomings that restrict its use, such as general mechanical properties, low tensile strength, poor creep resistance, low surface hardness, and poor heat resistance. [0003] In order to improve the shortcomings of polyethylene, it is usually necessary to modify polyethylene. Polyethylene is a crystalline polymer, and nano-silica can act as a nucleating agent, which can improve the crystallinity of polyethylene, accelerate the crystallization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/10C08K9/06C08K3/36C08K5/098C08J3/22C08L23/08C08J5/00B29B9/06
CPCC08J3/226C08J5/005B29B9/06C08K2201/011C08J2423/06C08J2323/08C08K9/10C08K9/06C08K3/36C08K5/098
Inventor 李磊张鑫张新力陈配全李光华李雪梅
Owner 山东捷茂新材料有限公司
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