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AssigneeQuadratic 3D, Inc.
InventorsSamuel N. Sanders, Emily M. Arndt, Elango Kumarasamy, Gavin R. Kiel
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The present invention relates to photohardenable compositions and methods of forming an object, the method preferably including a photohardenable composition described herein. Preferred photohardenable compositions and methods include a photohardenable resin component, a first photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength, and a second photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength. Preferred first photoinitators include photoswitchable photoinitiators. Preferably the second light-activated photoinitiator comprises a free-radical photoinitiator. Hardenable resin compositions and methods of forming an object including the hardenable resin composition are also disclosed.
A photohardenable composition comprising a photohardenable resin component, a first photoinitiator comprising a photoswitchable photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength to induce a crosslinking or polymerization reaction in the photohardenable composition, and a second photoinitiator comprising a free-radical photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength.
A photohardenable composition comprising a photohardenable resin component, a first photoinitiator comprising a photoswitchable photoinitiator that is activatable by exposure to light at a first wavelength and light at a second wavelength to alter at least one chemical or physical property of the photohardenable composition, a coinitiator, and a second photoinitiator comprising a Norrish Type I free-radical photoinitiator that is activatable by exposure to light at a third wavelength, wherein the first, second, and third wavelengths are not the same, and the third wavelength is shorter than the first wavelength and the second wavelength.
A photohardenable composition for use in printing one or more three dimensional objects in a volume of the photohardenable composition, the photohardenable composition comprising a photohardenable resin component, a first photoinitiator comprising a photoswitchable photoinitiator, one or more coinitiators, and a second photoinitiator comprising a Norrish Type I free-radical photoinitiator,
Dependencies are inferred from the claim text.