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Preparation method of polyurethane toughening PE wood-plastic composite material

A wood-plastic composite material and polyurethane technology, applied in the field of wood-plastic composite materials, can solve problems such as poor wear resistance, and achieve the effects of improving wear resistance, widening application fields, and good compatibility

Inactive Publication Date: 2015-09-23
QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of poor wear resistance of existing PE wood-plastic composite materials, and to provide a preparation method of polyurethane toughened PE wood-plastic composite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Take 1000 grams of raw wood powder, 700 grams of polyethylene, 200 grams of polyurethane, 50 grams of maleic anhydride grafted polyethylene, 10 grams of polyurethane prepolymer, polyurethane prepolymer modified maleic anhydride grafted polyethylene phase 10 grams of container agent, 10 grams of antioxidant, 10 grams of lubricant;

[0028] (2) Put wood powder, polyethylene and maleic acid grafted polyethylene into a high-speed mixer and mix for 10 minutes at 100°C according to the above ratio, then add polyurethane and polyurethane prepolymer and mix at high speed for 10 minutes, and finally add polyurethane Prepolymer modified maleic anhydride grafted polyethylene compatibilizer and other additives are mixed at high speed for 30 minutes before discharging;

[0029] (3) Then the uniformly mixed raw materials are sent to the twin-screw extruder for melt extrusion, and the barrel temperature of the reactive twin-screw extruder is controlled to be 160°C in zone I, 170°C...

Embodiment 2

[0031] (1) Take 700 grams of raw wood powder, 500 grams of polyethylene, 50 grams of polyurethane, 30 grams of maleic anhydride grafted polyethylene, 5 grams of polyurethane prepolymer, polyurethane prepolymer modified maleic anhydride grafted polyethylene phase 5 grams of container, 5 grams of antioxidant, 5 grams of lubricant;

[0032] (2) Put wood powder, polyethylene and maleic acid grafted polyethylene into a high-speed mixer according to the above ratio and mix for 1-10 minutes at 110°C, then add polyurethane and polyurethane prepolymer and mix at high speed for 5 minutes, and finally Add polyurethane prepolymer modified maleic anhydride grafted polyethylene compatibilizer and other additives and mix at high speed for 20 minutes before discharging;

[0033] (3) Then the uniformly mixed raw materials are sent to the twin-screw extruder for melt extrusion, and the barrel temperature of the reactive twin-screw extruder is controlled to be 155°C in zone I, 160°C in zone II, ...

Embodiment 3

[0035] (1) Take 800 grams of raw wood powder, 800 grams of polyethylene, 80 grams of polyurethane, 40 grams of maleic anhydride grafted polyethylene, 8 grams of polyurethane prepolymer, and the phase of polyurethane prepolymer modified maleic anhydride grafted polyethylene 8 grams of solvent, 5 grams of antioxidant, 8 grams of lubricant;

[0036] (2) Put wood flour, polyethylene and maleic acid grafted polyethylene into a high-speed mixer and mix for 3 minutes at 120°C according to the above ratio, then add polyurethane and polyurethane prepolymer and mix at high speed for 8 minutes, and finally add polyurethane Prepolymer modified maleic anhydride grafted polyethylene compatibilizer and other additives are mixed at high speed for 25 minutes before discharging;

[0037] Then the uniformly mixed raw materials are sent to the twin-screw extruder for melt extrusion, and the barrel temperature of the reactive twin-screw extruder is controlled to be 165°C in zone I, 170°C in zone I...

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PUM

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Abstract

The invention relates to a preparation method of a polyurethane toughening PE wood-plastic composite material. By the utilization of the bridging function of three compatibilizers of maleic anhydride grafted polyethylene, polyurethane prepolymer and polyurethane prepolymer modified maleic anhydride grafted polyethylene, and polyurethane, polyethylene and wood powder are connected to form an interpenetrating polymer network structure to prepare a high wear-resisting wood-plastic composite material. The preparation method of the wood-plastic composite material comprises the steps that the wood power, the polyethylene, the polyurethane and the three compatibilizers of the maleic anhydride grafted polyethylene, the polyurethane prepolymer and the polyurethane prepolymer modified maleic anhydride grafted polyethylene and other auxiliaries are added into a high mixing machine in a certain proportion and in a certain order and mixed for a certain time, and then the mixture is put into a double screw extrusion machine for being extruded and forming. By means of the preparation method of the polyurethane toughening PE wood-plastic composite material, the compatibility between materials is good, the technology preparation process is simple, the wear-resisting performance of the PE wood-plastic composite material can be remarkably improved, the service life is prolonged, and the application field is broadened.

Description

technical field [0001] The invention relates to the field of wood-plastic composite materials, in particular to a preparation method of polyurethane toughened PE wood-plastic composite materials. Background technique [0002] PE wood-plastic composite material is made of thermoplastic polyethylene (PE) and natural plant fibers (sawdust, bran shells, peanut shells, rice straw, etc.) through extrusion, molding, injection and other methods, with plastic corrosion resistance , weather resistance, moisture resistance, sun protection, high hardness, etc., and can also be processed twice like wood. It is widely used in floors, wall panels, building templates, logistics pallets, etc., but its impact strength and wear resistance are poor. . Especially when it is used for outdoor park decoration, its impact strength and wear resistance must be improved due to frequent impact and friction during use. [0003] Improving the impact resistance and wear resistance of PE wood-plastic comp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L75/04C08L51/06B29C47/92B29C48/92
Inventor 陈登龙黄秀萍刘金玲陈昕雄陈嘉炼
Owner QUANGANG PETROCHEM RES INST OF FUJIAN NORMAL UNIV