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3D-printing thermoplastic polyurethane material and preparation method of same

A thermoplastic polyurethane and 3D printing technology, applied in the field of polymer materials and 3D printing polymer preparation, can solve the problems of low melting temperature, large dimensional shrinkage and high price, and achieve the effects of low surface energy, stable size and low price

Inactive Publication Date: 2016-03-23
SHANGHAI HENGAN POLYURETHANE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the excellent comprehensive performance of TPU and its low melting temperature, it is a potential 3D printing material, but its high price and large dimensional shrinkage limit its use in 3D printing.

Method used

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  • 3D-printing thermoplastic polyurethane material and preparation method of same
  • 3D-printing thermoplastic polyurethane material and preparation method of same
  • 3D-printing thermoplastic polyurethane material and preparation method of same

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preparation example Construction

[0024] The present invention also provides a preparation method of 3D printing thermoplastic polyurethane material comprising the following steps:

[0025] Step 1: Weigh 35-75 parts of macromolecular polyol, 0-10 parts of fluorine-containing polyol, 2-25 parts of small molecule chain extender, 0-7 parts of fluorine-containing chain extender, and 0-8 parts of hydrolysis stabilizer , 0-10 parts of other additives, placed at 30-150°C for melting and dehydration for 2-4 hours;

[0026] Step 2: Add the melted and dehydrated macromolecular polyol, fluorine-containing polyol, small molecule chain extender, hydrolysis stabilizer and other additives, and 5-60 parts of isocyanate melted at 50-120°C to the twin-screw reactive extrusion at the same time. The reaction is carried out in the machine, and the extrusion temperature is 130-250 ° C to obtain thermoplastic polyurethane composite material particles through underwater pelletizing;

[0027] Step 3: Put the obtained thermoplastic po...

Embodiment 1

[0029] Weigh and weigh 35 parts of polytetrahydrofuran ether diol, 2 parts of 1,4-butanediol, 7 parts of 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol , respectively placed at 70°C for melting and dehydration for 3 hours (hours). Melt dehydrated polytetrahydrofuran ether diol, 2,2,3,3,4,4,5,5-octafluoro-1,6-hexanediol, 1,4-butanediol and melt at 80°C 5 parts of diphenylmethane diisocyanate were simultaneously added into a twin-screw reaction extruder for reaction, and the extrusion temperature was 130°C. The thermoplastic polyurethane composite material pellets are obtained through underwater pelletizing. The obtained thermoplastic polyurethane composite material particles were dried and aged in a vacuum oven at 150°C for 9 hours to obtain the required 3D printing thermoplastic polyurethane material.

[0030] The obtained 3D printing thermoplastic polyurethane material has a tensile strength of 33MPa and an elongation at break of 649%.

Embodiment 2

[0032]Weigh 51 parts of polyoxypropylene glycol, 6 parts of hexafluorobenzenehexafluoropentanediol, and 15 parts of 1,3-propanediol, and place them at 30° C. for melting and dehydration for 4 hours. Polyoxypropylene glycol, hexafluorobenzenehexafluoropentanediol, 1,3-propanediol, 2 parts of carbodiimide, 5 parts of montmorillonite and 30 parts of toluene diisocyanate melted at 50°C were melted and dehydrated at the same time. Add it to a twin-screw reaction extruder for reaction, and the extrusion temperature is 200°C. The thermoplastic polyurethane composite material pellets are obtained through underwater pelletizing. The obtained thermoplastic polyurethane composite material particles were dried and aged in a vacuum oven at 100°C for 50 hours to obtain the desired 3D printing thermoplastic polyurethane material.

[0033] The obtained 3D printing thermoplastic polyurethane material has a tensile strength of 27MPa and an elongation at break of 549%.

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Abstract

The invention discloses a 3D-printing thermoplastic polyurethane material and a preparation method of same. The 3D-printing thermoplastic polyurethane material includes, by weight, 35-75 parts of a macro-molecular polyol, 0-10 parts of a fluorine-containing polyol, 2-25 parts of a small-molecular chain extender, 0-7 parts of a fluorine-containing chain extender, 5-60 parts of isocyanate, 0-8 parts of a hydrolysis stabilizing agent, and 0-10 parts of other additives. Compared with a method in the prior art, an in-situ polymerization one-step method is employed in the preparation method. By means of one or more of the fluorine-containing polyol and the fluorine-containing chain extender, fluorine is introduced into the thermoplastic polyurethane material to prepare the 3D-printing thermoplastic polyurethane material which has the advantages of both the fluorine-containing compound and the TPU. The material is excellent in thermal-stability, is low in shrinking rate, is high in mechanical performance and is low in water absorption. A 3D-printing product prepared from the material is excellent in performance.

Description

technical field [0001] The invention relates to a 3D printing polymer preparation technology, more specifically to a 3D printing thermoplastic polyurethane material and a preparation method thereof, belonging to the field of polymer material research. Background technique [0002] 3D printing is a kind of rapid prototyping technology. It is a rapid additive manufacturing technology that generates three-dimensional entities by increasing the accumulation of materials layer by layer. It not only overcomes the loss caused by traditional subtractive manufacturing, but also makes product manufacturing more intelligent. Accurate and efficient. 3D printing technologies include fused lamination molding (FDM) technology, stereolithography (SLA) technology, selective laser sintering (SLS) technology and three-dimensional printing (3DP), etc. Among them, FDM has become the most promising process in 3D printing technology because of its advantages in molding materials and cost prices. ...

Claims

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Application Information

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IPC IPC(8): C08G18/38C08G18/32C08G18/42C08G18/48C08G18/62C08G18/66
CPCC08G18/4854C08G18/3802C08G18/3812C08G18/4238C08G18/6279C08G18/6633C08G18/6666
Inventor 朱勇代丽聂昌军刘宝全
Owner SHANGHAI HENGAN POLYURETHANE CO LTD
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