Patent · US Expired

Core-shell particles having non-polar outer surface and methods for producing a three-dimensional object from the particles

US7431987B2 · kind B2 · utility

50Cited by

4References

4Claims

0Family size

Assignee

Daimler AG · DE

Inventors

Rolf Pfeifer · Oberuhldingen, DE
Jialin Shen · Bernstadt, DE

Key dates

Filing date	Jun 16, 2003
Grant date	Oct 7, 2008
Priority date	—
Expiry date	Jan 27, 2024

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2991
WIPO fieldOther special machines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.