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US 12,252,561 B2Granted
Liquid, hybrid UV/VIS radiation curable resin compositions for additive fabrication
AssigneeStratasys, Inc.
InventorTai Yeon Lee
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AssigneeStratasys, Inc.
InventorTai Yeon Lee
Estimating the term…
Liquid radiation curable compositions are disclosed which are suitable for hybrid (i.e. cationic and free-radical) polymerization when processed via additive fabrication equipment utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region. According to one aspect, the compositions possess a first photoinitiator that is an iodonium salt of a non-fluorinated borate anion. According to another aspect, the composition is substantially devoid of a Norrish Type I and/or Type II photoinitiator. Also disclosed are methods of creating three-dimensional parts via additive fabrication processes utilizing sources of actinic radiation with peak spectral intensities in the UV/vis region employing liquid radiation curable compositions suitable for hybrid polymerization, and the parts cured therefrom.
A method of forming a three-dimensional article via an additive fabrication system utilizing a composition, wherein the composition is a radiation curable composition comprising a cationically curable constituent and a free-radically curable constituent, said composition further comprising at least a first photoinitiator that is an iodonium salt of a non-fluorinated borate anion, and a photosensitizer, the method comprising:
A three-dimensional part formed using a liquid radiation curable composition comprising a cationically curable constituent and a free-radically curable constituent, said composition further comprising at least a first photoinitiator that is an iodonium salt of a non-fluorinated borate anion, and a photosensitizer.
Dependencies are inferred from the claim text.