Thermoplastic polyurethane elastomer composite material, preparation method and application thereof

A technology of thermoplastic polyurethane and composite materials, which is applied in the field of 3D printing of melt molding and elastomer materials, and can solve the problems of complicated preparation methods, inability to obtain excellent elasticity of thermoplastic polyurethane, and increased operation complexity and cost.

Active Publication Date: 2018-04-06
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1439662A discloses a soft low-shrinkage thermoplastic polyurethane elastomer that is easy to release from the mold, which mainly uses a mixture of one or more hydroxyl-terminated linear polyester polyols and at least two polyether polyols, through a synthetic method Preparation of thermoplastic polyurethane elastomer with 45-65 Shore A hardness, tensile strength greater than 12MPa, and shrinkage rate ≤3.5%, but it is suitable for molding processing, which is completely different from 3D printing processing
CN103756236A discloses a thermoplastic elastomer composition for preparing soft printing materials for three-dimensional printing rapid prototyping. Its composition includes TPU elastomers and hard polyolefin materials such as polypropylene and polyethylene. mixture, so that the shrinkage of the mixture is reduced, but the preparation method is complicated, and it is impossible to obtain the excellent elasticity of thermoplastic polyurethane
CN104910609A discloses a polyurethane composite material for 3D printing and its preparation method and application. It uses a single inorganic filler to prepare the composite material, and does not obtain the result of improving the shrinkage of the product, and the pulverization of the polyurethane resin also increases operational complexity and cost

Method used

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  • Thermoplastic polyurethane elastomer composite material, preparation method and application thereof
  • Thermoplastic polyurethane elastomer composite material, preparation method and application thereof
  • Thermoplastic polyurethane elastomer composite material, preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0044] Mix silane coupling agent KH550, which accounts for 0.1% of the total mass of the filler, with absolute ethanol at a mass ratio of 1:6, add it to the filler, mix and stir evenly, and dry it in an oven at 80°C to obtain a surface-treated filler .

[0045] 30 copies of Wanhua 1180 polyester TPU, 0.1 part of mica with a layer spacing of 0.5nm and a thickness of 0.9nm and 1 part of TiO with an average particle size of 2um 2 Particles, primary antioxidant 0.01 part triethylene glycol bis[β-(3-tert-butyl-4-hydroxy-5-methylphenyl) propionate], auxiliary antioxidant 0.01 part triphosphite (2.4-Di-tert-butylphenyl) ester, 0.02 parts of polyethylene with a number average molecular weight of 2000 and 1 part of colorant silver white pearl powder were added to a high mixer and mixed evenly. The mixed material is extruded and granulated in a twin-screw extruder.

[0046] For differential scanning calorimetry data, see figure 1 , the crystallization start temperature is 122°C, t...

Embodiment 2

[0049] Mix silane coupling agent KH560 accounting for 1.0% of the total mass of the filling with anhydrous methanol at a mass ratio of 1:6, add it to the filling, mix and stir evenly, and dry in an oven at 80°C to obtain a surface-treated filling .

[0050] 65 copies of Wanhua 1185 polyester TPU, 7.5 parts of montmorillonite with a layer spacing of 1nm and a thickness of 2nm, 2.5 parts of glass microspheres with an average particle size of 10um, and 0.08 parts of four-[β-(3,5-di-tert-butyl-4- Hydroxyphenyl) propionate] pentaerythritol ester, 0.12 part of bis(3,5-tertiary butyl-4-hydroxyphenyl) sulfide and 0.8 part of stearamide are added into the high mixer and mixed evenly. The mixed material is extruded and granulated in a twin-screw extruder.

[0051] For differential scanning calorimetry data, see figure 2 , the crystallization start temperature is 85.7°C, the maximum crystallization enthalpy temperature is 68.5°C, and the crystallization end temperature is 34.7°C. T...

Embodiment 3

[0054] Mix silane coupling agent KH550 accounting for 1.5% of the total mass of the filling with isopropanol at a mass ratio of 1:6, add it to the filling, mix and stir evenly, and dry in an oven at 80°C to obtain a surface-treated filling . 70 copies of Wanhua 1295 polyester TPU, 11.8 parts of talc powder with a layer spacing of 1.5nm and a thickness of 10nm, and 3.2 parts of Al with an average particle size of 10um 2 o 3 , 0.13 parts of β-(3,5-di-tert-butyl-4-hydroxyphenyl) n-octadecyl propionate as main antioxidant, 0.26 parts of β,β'-thiodipropionic acid as auxiliary antioxidant Dilauryl ester and 0.2 part of ethylenediamine bis stearylamide are added into a high mixer and mixed evenly. The mixed material is extruded and granulated in a twin-screw extruder. For differential scanning calorimetry data, see image 3 , the crystallization start temperature is 96°C, the maximum crystallization enthalpy temperature is 83.2°C, and the crystallization end temperature is 36.5...

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Abstract

The invention relates to a thermoplastic polyurethane elastomer composite material, a preparation method and an application thereof. The composite material comprises the following components: a hypocrystalline thermoplastic polyurethane elastomer and filler through surface treatment. The filler is a mixture of layered filler and granular filler in a mass ratio of 0.1: 1 to 5: 1, preferably 0.5:1 to 3:1. The composite material is prepared by fusing and blending, so that the crystallizing characteristic of a thermoplastic polyurethane elastomer product is improved, a low shrink thermoplastic polyurethane elastomer is obtained, the property of the material is ensured stable, and the obtained composite material can be used for a quick forming method of fused processing, for example, a fusing deposition quick forming method or a selective laser sintering method.

Description

technical field [0001] The invention belongs to the field of elastomer materials, and further relates to a thermoplastic polyurethane elastic composite material and a preparation method thereof, which are suitable for the field of 3D printing in fusion molding. Background technique [0002] 3D printing is a technology of manufacturing three-dimensional products by adding materials layer by layer through 3D printing equipment according to the designed 3D model. In recent years, with the introduction of Industry 4.0, the concepts of intelligent manufacturing and flexible manufacturing have been widely recognized, and 3D printing has also developed rapidly. At present, the main technologies include selective laser sintering (Selective laser sintering, SLS), stereolithography (Stereolithography, SLA), fused deposition modeling (Fused deposition modeling, FDM) and so on. FDM and SLS are currently the most widely used rapid prototyping technologies. The existing 3D printing cons...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/06C08L75/08C08K13/06C08K9/06C08K3/34C08K3/22C08K3/36C08K7/20C08K3/26B33Y70/00
CPCB33Y70/00C08K3/22C08K3/26C08K3/34C08K3/346C08K3/36C08K7/20C08K9/06C08K13/06C08K2003/2227C08K2003/2241C08K2201/003C08K2201/006C08K2201/014C08L75/06C08L75/08C08L2207/04C08L23/06C08L91/06C08K3/04C08K7/18C08L83/04
Inventor 杨杰黄岐善
Owner WANHUA CHEM GRP CO LTD
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