Modified gangue powder filled polyolefin flame retardant composite material and its preparation process

A flame retardant composite material and coal gangue powder technology are applied in the field of coal gangue modified and filled polyolefin flame retardant composite material and preparation, and can solve the problem of decreasing the filling amount of coal gangue powder, reducing the mechanical properties of polyolefin materials, increasing the preparation cost, etc. problems, to achieve the effect of improving flow processability, excellent flame retardant effect, and improving comprehensive mechanical properties

Active Publication Date: 2022-03-08
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional flame retardant fillers are considered to be pollution-free flame retardants such as: aluminum hydroxide or magnesium hydroxide, but such flame retardants need to be added in large quantities to obtain better flame retardant properties and need to be supplemented with flame retardant synergists, It will greatly reduce the mechanical properties of polyolefin materials and increase the preparation cost. In addition, this type of flame-retardant filler will greatly reduce the filling amount of coal gangue powder, so this problem also needs to be solved urgently

Method used

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  • Modified gangue powder filled polyolefin flame retardant composite material and its preparation process
  • Modified gangue powder filled polyolefin flame retardant composite material and its preparation process
  • Modified gangue powder filled polyolefin flame retardant composite material and its preparation process

Examples

Experimental program
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Effect test

Embodiment 1

[0025] At room temperature, dry the gangue powder at 110-120°C until the water content is <0.1%, and add HDCP and dried gangue powder into the high-speed mixer at a weight ratio of 1:100 at a speed of 1000r / min. Mix for 10 minutes to obtain modified gangue powder. Fill the modified coal gangue powder and polyolefin into the twin-screw extruder according to the weight ratio of 30:100. The main screw speed is 140rpm, the pump speed is 10rpm, and the temperature is 190-200°C. After melt blending and extrusion, cool Use a granulator to cut pellets, fill the pellets into the injection molding machine, the injection molding temperature is 190°C, the injection molding pressure is 40MPa, and the injection extrusion can prepare modified coal gangue powder filled polyolefin flame-retardant composite products, and its elastic modulus is improved. 20%, the strength can be increased by 10%, the toughness can be enhanced by 20%, the heat distortion temperature is 260°C, and the limiting oxy...

Embodiment 2

[0027]At room temperature, dry the gangue powder at 110-120°C until the water content is <0.1%, and add HDCP and dried gangue powder into the high-speed mixer at a weight ratio of 10:100 at a speed of 1300r / min. Mix for 20 minutes to obtain modified gangue powder. Fill the modified coal gangue powder and polyolefin into the twin-screw extruder at a weight ratio of 30:100, the main screw speed is 120rpm, the pump speed is 9rpm, and the temperature is 220-240°C. After melt blending and extrusion, cool Cut pellets with a granulator, fill the pellets into the injection molding machine, the injection molding temperature is 230°C, the injection molding pressure is 60MPa, and the injection extrusion can prepare modified coal gangue powder filled polyolefin flame-retardant composite products, and its elastic modulus is improved. 35%, the strength can be increased by 28%, the toughness can be enhanced by 45%, the heat distortion temperature is 280°C, and the limiting oxygen index is 33...

Embodiment 3

[0029] At room temperature, dry the gangue powder at 110-120°C until the water content is <0.1%, and add HDCP and dried gangue powder into the high-speed mixer at a weight ratio of 8:100 at a speed of 1200r / min, at a high speed Mix for 15 minutes to obtain modified gangue powder. Fill the modified coal gangue powder and polyolefin into the twin-screw extruder at a weight ratio of 30:100. The main screw speed is 100 rpm, the pump speed is 8 rpm, and the temperature is 210-220 ° C. After melt blending and extrusion, cool Use a granulator to cut pellets, fill the pellets into the injection molding machine, the injection molding temperature is 210°C, the injection molding pressure is 50MPa, and the injection extrusion can prepare modified coal gangue powder filled polyolefin flame-retardant composite products, and its elastic modulus is improved. 40%, the strength can be increased by 35%, the toughness can be enhanced by 55%, the heat distortion temperature is 290°C, and the limit...

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Abstract

The modified coal gangue powder-filled polyolefin flame-retardant composite material and its preparation process belong to the technical field of polyolefin flame-retardant composite material preparation. The weight ratio of modified coal gangue powder to polyolefin in this composite material is 10-60:100, and the modified gangue powder contains cyclotriphosphazene derivatives with a new structure, which can be used as surface modifiers and flame retardants . The coal gangue powder modified by cyclotriphosphazene is easy to disperse uniformly in the polyolefin matrix, and can enhance the interfacial bonding force between the coal gangue powder and the polyolefin matrix, so that the mechanical properties of the composite material are significantly improved. And has good flame retardant properties. In the novel composite material, the filling amount of coal gangue is high, the amount of polyolefin is less, and the coal gangue powder does not need to be calcined, so it is energy-saving and low in cost. The composite material has excellent comprehensive mechanical properties and remarkable flame retardancy, simple preparation process, no use of strong acid and strong alkali in the preparation process, and no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of preparation of polyolefin flame-retardant composite materials, and in particular relates to a coal gangue-modified filled polyolefin flame-retardant composite material and a preparation process. Background technique [0002] Polyolefins are a class of materials with a wide range of applications and excellent performance, and are widely used in home appliances, automobiles, and machinery manufacturing. However, with the rapid development of various fields, general-purpose polyolefin materials can no longer meet the growing demand for performance, and polyolefin is a synthetic resin made from petroleum, and petroleum is a non-renewable one-time natural resource. Due to the consumption of resources and the soaring price, the price of polyolefin materials has remained high, so the modification of polyolefin filling can not only effectively improve the overall performance of polyolefin materials, but also effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/02C08K9/04C08K3/36C08K3/22C08K5/5399
CPCC08K9/04C08K3/36C08K3/22C08K5/5399C08K2003/2227C08L2201/02C08L2201/08C08L23/02
Inventor 索红莉武鑫宇张腾周宇琦纪耀堂裴俊峰马麟刘敏
Owner BEIJING UNIV OF TECH
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