Zeba Parkar,James D. Hansen,Tianyu Wu,Carsten Franke,Timothy D. Dunbar,Gregory A. Kobussen,Ahmed S. Abuelyaman,Bradley D. Craig
申请号：
US16640089
公开号：
US20200197138A1
申请日:
2018.08.22
申请国别(地区):
US
年份:
2020
代理人:
摘要：
A radiation curable composition including at least one radiation hardenable component, a photo-initiator, and a filler material having a population of particulates in an amount greater than or equal to 50% by weight of the printable composition. The population of particulates exhibits a median diameter (D50) of greater than or equal to 0.3 micrometer on a volume-average basis as determined using the Particle Size Test Method, and the radiation curable composition exhibits a viscosity of less than or equal to 150 Pa s when measured using the Viscosity Test Method. A method, apparatus, and systems for producing composite articles by selectively exposing a portion of the radiation curable composition to a source of actinic radiation to at least partially cure the exposed portion of the radiation curable composition, thereby forming a hardened layer, preferably by an additive manufacturing process such as stereophotolithography, are also described. The composite articles may include composite dental restorations.
