Nylon-polypropylene-filler modified composite powder, and preparation method and application thereof

A technology of composite powder and polypropylene, which is applied in the field of preparation of nylon-polypropylene-filled modified composite powder, can solve the problems of high price, low service temperature and poor mechanical properties, and achieve low cost, high bending strength and large size good stability effect

Inactive Publication Date: 2017-02-08
HANGZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problems that the current simple nylon 12 powder material is expensive, has a low service temperature, and has poor mechanical properties, the present invention proposes a nylon-polypropylene-filled modified composite powder and its preparation method and application, the composite powder It has the advantages of good mechanical properties, high bending strength, low shrinkage rate, good dimensional stability, environmental protection and pollution-free, low cost, etc., and is easy to popularize and promote

Method used

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  • Nylon-polypropylene-filler modified composite powder, and preparation method and application thereof
  • Nylon-polypropylene-filler modified composite powder, and preparation method and application thereof
  • Nylon-polypropylene-filler modified composite powder, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Mix 10 parts of polypropylene (PP, melt index 15), 0.5 parts of maleic anhydride (MAH) and 0.1 part of dicumyl peroxide (DCP) and then melt and extrude them in a twin-screw extruder After pelletizing, the temperature of each zone of the twin-screw extruder is 210°C, 235°C, 235°C, 235°C, 235°C, 232°C, and the extrusion temperature is 225°C. After drying, repeat extrusion and granulation once 10 parts of polypropylene grafted maleic anhydride compatibilizer (PP-g-MAH) were obtained;

[0029] (2) Add 10 parts of PP-G-MAH and 90 parts of nylon 6 particles, and then add 0.75 parts of 1,3,5-trimethyl-2,4,6-tri(3,5-di-tert-butyl-4 -Hydroxybenzyl)benzene, 0.75 parts of 2,2'-ethylenebis(4,6-di-tert-butylphenyl)fluorophosphite 2000rpm mixed, then melted and extruded to pelletize by twin-screw extruder , where the temperatures in each zone of the twin-screw extruder are 210°C, 235°C, 235°C, 235°C, 235°C, and 232°C, respectively, and the extrusion temperature is 225°C. After v...

Embodiment 2

[0032] (1) After mixing 20 parts of polypropylene (PP, with a melt index of 15), 2 parts of maleic anhydride (MAH) and 0.4 parts of benzoyl peroxide (BPO), they are melted and reacted in a twin-screw extruder and extruded For pelletizing, the temperatures in each zone of the twin-screw extruder are 212°C, 237°C, 237°C, 237°C, 237°C, and 234°C respectively, and the extrusion temperature is 228°C. After drying, repeatedly extrude and granulate for 2 times to obtain 20 parts of polypropylene grafted maleic anhydride compatibilizer;

[0033] (2) 20 parts of polypropylene grafted maleic anhydride compatibilizers prepared in step (1) are mixed with 80 parts of nylon 66 particles, 0.6 parts of 2,6-di-tert-butyl-4-methyl-phenol, 0.6 parts of four (2,4-di-tert-butylphenyl)-4,4'-biphenyl bisphosphite is mixed at a high speed of 500rpm, and melted and extruded to pelletize by a twin-screw extruder, wherein each zone of the twin-screw extruder The temperatures are 212°C, 237°C, 237°C, 23...

Embodiment 3

[0036] (1) After mixing 30 parts of polypropylene (PP, with a melt index of 30), 5 parts of maleic anhydride (MAH) and 1 part of benzoyl peroxide (BPO), they are melted and reacted in a twin-screw extruder and extruded For pelletizing, the temperatures in each zone of the twin-screw extruder are 216°C, 240°C, 240°C, 240°C, 240°C, and 238°C respectively, and the extrusion temperature is 232°C. After drying, repeatedly extrude and granulate 3 times to obtain 30 parts of polypropylene grafted maleic anhydride compatibilizer;

[0037] (2) 30 parts of polypropylene grafted maleic anhydride with 70 parts of nylon 1212 particles, 035 parts of 2,2'-bis(4-methyl-6-tert-butyl-phenol)methane, 0.35 parts of 2,2' - Ethylene bis(4,6-di-tert-butylphenyl) fluorophosphite is mixed at a high speed of 1500rpm, then melted and extruded into granules by a twin-screw extruder, wherein the temperatures in each zone of the twin-screw extruder are respectively They were 216°C, 240°C, 240°C, 240°C, 24...

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Abstract

The invention relates to the field of high-molecular composite materials and provides a nylon-polypropylene-filler modified composite powder and a preparation method and application thereof to overcome the problems of high price, low application temperature and poor mechanical properties of simple nylon 12 powder materials in the prior art. The composite powder provided by the invention has the advantages of good mechanical properties, great bending strength, low shrinkage, good dimensional stability, environment friendliness, no pollution, low cost and the like, and is convenient to promote and apply.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a preparation method of nylon-polypropylene-filled modified composite powder for selective laser sintering. Background technique [0002] In the selective laser sintering (Selective Laser Sintering, SLS for short) process, the powder material is a key factor affecting the performance of the part. Common printing materials include polylactic acid (PLA), acrylonitrile-butadiene-styrene copolymer (ABS), polyvinyl alcohol (PVA), nylon (PA), etc. Polylactic acid and acrylonitrile-butadiene-styrene copolymers have poor mechanical properties and are not resistant to high temperatures. At present, nylon powder material is the most widely used raw material in the field of SLS manufacturing. Its parts have high density and good mechanical properties, and can be widely used in civil, industrial and national defense fields. However, at present, pure nylon 6 SLS 3D printing materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08L51/06C08K13/06C08K9/06C08K7/28C08K3/36C08K5/098C08K3/34C08K3/08
CPCC08K2201/011C08L77/02C08L77/06C08L2205/08C08L51/06C08K13/06C08K9/06C08K7/28C08K3/36C08K5/098C08K3/34C08K2003/0812
Inventor 郝超伟来国桥蒋剑雄陈遒李美江潘庆华罗蒙贤
Owner HANGZHOU NORMAL UNIVERSITY
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