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Spray-dried soft-phase emulsion polymer for filling gussets in bead polymer layers in binder jetting method

一种乳液聚合物、喷射方法的技术，应用在悬浮聚合物的混合物领域，能够解决加速粘合剂喷射方法等问题，达到翘曲减少、增加体积密度、高体积密度的效果

Active Publication Date: 2018-12-21
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The problem underlying the invention was to make it possible to speed up the binder jetting process by enabling the printing of polymer particles without the need for time-consuming product reprocessing

Method used

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Examples

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Embodiment Construction

[0034] Some embodiments of the invention are elucidated below by way of example, but they should not be considered as limiting the method according to the invention. These are only examples, which and many other alternative configuration options enable efficient implementation of the method according to the invention.

[0035] Suspension polymers used are, for example, pulverulent materials prepared by free-radical polymerization in the presence of water, with a volume-average median particle size (d50) of 35-100 μm, particularly preferably 30-80 μm, most preferably 35- 60 μm. Preferably, the suspending polymer is a PMMA or MMA copolymer. For this purpose, the comonomers may, for example, be selected from the group consisting of acrylates, methacrylates and styrenes.

[0036] Emulsion polymers are obtained, for example, from dispersions prepared by free-radical polymerization in the presence of water. Precipitation in a second inventive embodiment of the present invention i...

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Abstract

The invention relates to the technical field of 3D printing, in particular in the form of the binder jetting method, in which particles are adhered in a powder bed using a compressed adhesive in orderto form a three-dimensional object. The particles can be inorganic materials, such as sand or a metal powder for example or polymer particles, such as polymethacrylates or polyamides for example. Thepolymethacrylates can be provided in the form of suspension polymers for example, i.e. bead polymers.

Description

technical field [0001] The invention relates to the technical field of 3D printing, in particular in the form of a binder jetting method, in which granular material in a powder bed is bound by means of a printed binder to form a three-dimensional object. The particulate material may be an inorganic material such as sand or metal powder or a particulate polymer material such as polymethacrylate or polyamide. For this purpose, polymethacrylates can take the form, for example, of suspension polymers, known as bead polymers. [0002] The invention relates in particular to mixtures of emulsions and suspension polymers as powders for 3D printing, which differ from the prior art in that the emulsion polymers are spray-dried or precipitated in the presence of the suspension polymers. This results in a higher bulk density of the powder than in the case of pure suspension polymers. In this way, the advantage of fast dissolution on contact with the printed adhesive and the resulting in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C64/106B33Y70/00
CPCB33Y70/00B29C64/165Y02P10/25B22F10/14B29K2033/12B33Y10/00C08L33/12C09D11/30
Inventor D·波佩A·弗鲁特S·伯恩哈特S·维贝尔
Owner EVONIK OPERATIONS GMBH
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