MATERIAL SYSTEM FOR 3D PRINTING

• Main Authors: MISPELKAMP, Dominik, WUNNICKE, Odo, MÜLLER, Andreas, EL AZZAWI, Alexander, BEHRENS, Ulrike, ROCCARO, Maximilian, HOLTHAUSEN, Michael, SCHRIEF, Thomas, POPPE, Dirk, PRIDÖHL, Markus
• Format: Patent
• Language: English; French
• Published: 29.12.2022
• Subjects: ADDITIVE MANUFACTURING TECHNOLOGY; ADDITIVE MANUFACTURING, i.e. MANUFACTURING OFTHREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVEAGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING,STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

The present disclosure provides a material system for three-dimensional printing, which includes (a) a powder composition comprising polymer particles and (b) a liquid binder comprising a mixture of ethylenically unsaturated monomers copolymerizable to a copolymer having a glass transition temperature, as determined by dynamic mechanical analysis, of 30°C or less, wherein the mixture of ethylenically unsaturated monomers comprises hydroxybutyl acrylate. Such material system enables to prepare articles by 3D printing which have good green body strength and form stability upon curing at elevated temperatures. The final cured three-dimensional articles have mechanical properties, which render them suitable for end use applications. La présente divulgation fournit un système de matériau pour impression en trois dimensions, qui comprend (a) une composition de poudre comprenant des particules de polymère et (b) un liant liquide comprenant un mélange de monomères à insaturation éthylénique copolymérisables en un copolymère ayant une température de transition vitreuse, telle que déterminée par analyse mécanique dynamique, inférieure ou égale à 30 °C, le mélange de monomères à insaturation éthylénique comprenant de l'acrylate d'hydroxybutyle. Un tel système de matériau permet de préparer des articles par impression 3D qui ont une bonne résistance du corps vert et une stabilité de forme lors d'un durcissement à des températures élevées. Les articles tridimensionnels durcis finaux ont des propriétés mécaniques qui les rendent appropriés pour des applications d'utilisation finale.