Core-shell particles having non-polar outer surface and methods for producing a three-dimensional object from the particles
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United States of America Patent
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Oct 7, 2008
Grant Date -
May 18, 2006
app pub date -
Jun 16, 2003
filing date -
Jun 18, 2002
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Abstract
The invention relates to particles for producing a three-dimensional object by using layer-building methods (powder-based generative rapid prototyping methods), to methods for producing a three-dimensional object therefrom, and to an object that can be produced by using the particles or the methods. The aim of the invention is to improve the precision of production methods of this type by preventing the tendency of the particles used to agglomerate. To this end, a surfactant layer is applied, whereby the nonpolar groups of the surfactants are oriented toward the particle surface thus forming a hydrophobic surface having a low tendency to agglomerate.
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