Use of thermosetting polymeric powder composition

A technology of polymer and composition, applied in the field of polymer materials, to achieve the effect of high porosity

Active Publication Date: 2019-11-22
TIGERWERK LACK & FARBENFAB
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The challenge with this printing technique is that the thermoset polymer powder must melt and at least partially solidify under the very brief energy exposure of the 3D printing process, leaving free functional groups for curing / crosslinking with the next printed layer

Method used

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  • Use of thermosetting polymeric powder composition
  • Use of thermosetting polymeric powder composition
  • Use of thermosetting polymeric powder composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0120] The mixture consists of 600 parts P3490 (DSM) (a saturated carboxylated polyester resin), 45 parts PT-910 (Huntsman), 320 parts of titanium dioxide ( 2160, Kronos Titan GmbH), 15 parts of Resiflow PV 5 (Worlée-Chemie GmbH), 8 parts of Accelerator DT-3126 (Huntsman) and 7 parts of benzoin. All components were pre-mixed in a high speed mixer for 1 minute and then extruded in a twin-screw ZSK-18 extruder at a screw speed of 400 rpm with a rear zone temperature of 80°C and a front zone temperature of 90°C. In an alternative setup of the extruder, a temperature gradient of 40 to 100° C. and a cooling device for the dosing zone are used. The resulting compound was then cooled, granulated and finely ground to obtain a powder with a D50 of 30-40 μm. The powder can be used in 3D printers, such as SLS laser sintering 3D printers.

Embodiment 2

[0122] The mixture consists of 600 parts P3490, 45 parts Composed of PT-910 (Huntsman), 15 parts Resiflow PV 5 (Worlée-Chemie GmbH), 8 parts Accelerator DT-3126 (Huntsman), 7 parts benzoin and 10 parts short carbon fiber. The carbon fiber used has an average length of 60μm and can be found in the product name - Obtained under AHAT M100 (Toho Tenax Europe GmbH). All components were pre-mixed in a high speed mixer for 1 minute and then extruded in a twin-screw ZSK-18 extruder at a screw speed of 400 rpm with a rear zone temperature of 90°C and a front zone temperature of 100°C. In an alternative setup of the extruder, a temperature gradient of 40 to 100° C. and a cooling device for the dosing zone are used. The resulting compound was then cooled, granulated and finely ground to obtain a powder with a D50 of 30-40 μm. The powder can be used in 3D printers, such as SLS laser sintering 3D printers.

Embodiment 3

[0124] The mixture consists of 500 parts P 1580 (DSM) (a saturated OH-polyester resin), 215 parts Composition of B 1530 (Evonik), 15 parts of Resiflow PV 5 (Worlée-Chemie GmbH) and 7 parts of benzoin. All components were pre-mixed in a high speed mixer for 1 minute and then extruded in a twin-screw ZSK-18 extruder at a screw speed of 400 rpm with a rear zone temperature of 90°C and a front zone temperature of 100°C. In an alternative setup of the extruder, a temperature gradient of 40 to 100° C. and a cooling device for the dosing zone are used. The resulting compound was then cooled, granulated and finely ground to obtain a powder with a D50 of 30-40 μm. The powder can be used in 3D printers, such as SLS laser sintering 3D printers.

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Abstract

The present invention relates to the use of a thermosetting polymeric powder composition in a 3D dry printing process to produce a 3D duroplast object, the composition comprising at least one curablepolymeric binder material with free functional groups, wherein during the 3D dry printing process the formed object is only partially cured to a curing degree of below 90 %, preferably below 60 %, most preferably between 35 % and 60 %, and the printing process is being followed by a post treatment comprising a heat treatment step to fully cure the printed object into a 3D duroplast object.

Description

technical field [0001] The present invention relates to the field of rapid prototyping (eg 3D dry printing) and in particular to the development of polymeric materials for the production of functional parts, prototypes, models or tools using 3D printing methods. Background technique [0002] In almost any field of mechanical engineering there is a need for rapid production prototyping. Laser sintering, known as prior art, is a common rapid prototyping technique enabling the direct production of three-dimensional articles of higher resolution and dimensional accuracy from various powder materials, including conventional polymer powders. Prototypes or even production parts can be efficiently and economically produced by this method, commonly known as Selective Laser Sintering ( DTM Corporation, Austin, Texas) (herein referred to as SLS). [0003] SLS was developed in the mid-1980s by Carl Deckard and Joseph Beaman of the Department of Mechanical Engineering at the Universit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/00B33Y70/00B29C64/141B29C64/153C08G59/42
CPCC08L67/00B29C64/153B33Y70/10C08K2003/2241B33Y70/00C08K3/22C08K7/06C08K7/10C08G59/4276C08L63/00C09D5/03C09D201/02C09D167/00B33Y40/20B33Y80/00B29C2791/009C08J3/247C08L33/08C08L33/10
Inventor 莱-洪·源卡斯滕·赫茨霍夫伯恩哈德·布吕斯特勒格哈德·布欣格尔
Owner TIGERWERK LACK & FARBENFAB
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