Invention Grant
- Patent Title: Radiation curable compositions and composite articles made using an additive manufacturing process
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Application No.: US16640089Application Date: 2018-08-22
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Publication No.: US11553996B2Publication Date: 2023-01-17
- Inventor: Zeba Parkar , James D. Hansen , Tianyu Wu , Carsten Franke , Timothy D. Dunbar , Gregory A. Kobussen , Ahmed S. Abuelyaman , Bradley D. Craig
- Applicant: 3M INNOVATIVE PROPERTIES COMPANY
- Applicant Address: US MN St. Paul
- Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee: 3M INNOVATIVE PROPERTIES COMPANY
- Current Assignee Address: US MN St. Paul
- Agent Adrian L. Pishko
- International Application: PCT/IB2018/056371 WO 20180822
- International Announcement: WO2019/048963 WO 20190314
- Main IPC: C08K7/16
- IPC: C08K7/16 ; C08F2/46 ; C08F2/50 ; C08G61/04 ; A61C13/00 ; B33Y10/00 ; B33Y30/00 ; B29C64/124 ; A61K6/887 ; A61K6/17 ; C08F222/10 ; C08K3/36 ; C08K9/02 ; B33Y70/10 ; B33Y80/00 ; B29K509/02 ; B29L31/00

Abstract:
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.
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