Patent ID: 7491792
Filing Date: 2009-02-17
Classification: B33Y,C08L,C09D

Abstract:
1. A polymer powder, comprising: at least one block polyetheramide comprising an oligoamide dicarboxylic acid and a polyetheramine, wherein said polyetheramine has a weight-average molar mass ranging from 200 to 5000 g/mol and comprises primary amino groups and a polyether backbone comprising at least one selected from the group consisting of propylene oxide, ethylene oxide, polytetramethylene oxide, wherein said oligoamide dicarboxylic acid is selected from the group consisting of an oligoamide dicarboxylic acid obtained from laurolactam, an oligoamide dicarboxylic acid obtained from a lactam having at least 8 carbon atoms, from a ω-aminocarboxylic acid corresponding to an oligoamide dicarboxylic acid obtained from a lactam having at least 8 carbon atoms and from a dicarboxylic acid; and wherein said powder is suitable for use in a layer-by-layer process in which regions of a powder layer are selectively melted via introduction of electromagnetic energy.