Process of processing a radiation-curable thiolen based composition with additive-manufacturing technology

The invention relates to a process of processing a radiation-curable composition with an additive-manufacturing technique comprising a radiation-curing step, the radiation-curable composition comprising mercapto-functional Component A comprising at least three mercapto moieties, crosslinker Componen...

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Bibliographische Detailangaben
Hauptverfasser:	Zech, Joachim W, Osswald, Peter U, Hoffmann, Henning
Format:	Patent
Sprache:	eng
Schlagworte:	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 APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE CHEMISTRY COMPOSITIONS BASED THEREON DENTISTRY HUMAN NECESSITIES HYGIENE MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS MEDICAL OR VETERINARY SCIENCE 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
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Beschreibung
Zusammenfassung:	The invention relates to a process of processing a radiation-curable composition with an additive-manufacturing technique comprising a radiation-curing step, the radiation-curable composition comprising mercapto-functional Component A comprising at least three mercapto moieties, crosslinker Component B with at least three vinyl or allyl moieties, photo-initiator(s) Component C for initiating a curing reaction between Component A and Component B, wherein the radiation-curable composition does not comprise urethane (meth)acrylate oligomers in an amount of more than 4 wt. % with respect to the whole composition. 3-dim articles which can be produced are typically transparent and have adequate mechanical properties. The radiation-curable composition is in particular useful for producing clear-tray aligners for dental and orthodontic purposes.