Patent ID: 7365129
Filing Date: 2008-04-29
Classification: B29C,B33Y,C08F

Abstract:
1. A powder system for use in solid freeform fabrication, consisting essentially of: at least one first polymer powder having reactive properties and at least one second polymer powder having fusible properties, wherein the at least one first polymer comprises at least one reactive polymer and wherein the at least one second polymer comprises at least one fusible polymer, the at least one reactive polymer selected from the group consisting of a cationic polyelectrolyte, a mixture of cationic and anionic polyelectrolytes, a polymer having an epoxy functionality, a polymer having a primary amino group, and mixtures thereof and the at least one fusible polymer selected from the group consisting of an acrylate polymer or copolymer, a copolymer of vinyl/vinylidene chloride, poly(styrene-co-butyl-acrylate), a polyester, a low melting polyolefin, a polyurethane, a polyether-ester elastomer, poly(vinyl acetate), an ethylene-vinyl acetate co-polymer, a vinyl ester polymer, a vinyl ester copolymer, and mixtures thereof and wherein the at least one first polymer is selected to be reactive with a liquid binder and wherein the at least one second polymer is selected to be fusible at a temperature above the melting point or glass transition temperature of the at least one second polymer.