Core-shell particles having non-polar outer surface and...

Details Core-shell particles having non-polar outer surface and... Core-shell particles having non-polar outer surface and...

2003-06-16

2008-10-07

Le, H. T (Department: 1794)

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

C428S323000, C427S180000, C427S201000, C427S203000, C427S474000, C427S595000, C419S002000

Reexamination Certificate

active

07431987

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.

REFERENCES:
patent: 3935339 (1976-01-01), Cooke, Jr.
patent: 5204055 (1993-04-01), Sachs et al.
patent: 5229209 (1993-07-01), Gharapetian et al.
patent: 6485831 (2002-11-01), Fukushima et al.
patent: 06-218712 (1994-08-01), None
patent: 07-502938 (1995-03-01), None
patent: 2003-507120 (2003-02-01), None
patent: WO 92/10343 (1992-06-01), None
patent: WO 01/13814 (2001-03-01), None

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