초록 ▼

A three-dimensional object formed from a photohardenable composition containing deflecting matter of core-shell polymers. A preferred material for the polymeric core is crosslinked to an extent to be nonswellable and insoluble in solvent for noncrosslinked polymer material while the shell polymer ha

A three-dimensional object formed from a photohardenable composition containing deflecting matter of core-shell polymers. A preferred material for the polymeric core is crosslinked to an extent to be nonswellable and insoluble in solvent for noncrosslinked polymer material while the shell polymer has no pendant acid groups.

대표청구항 ▼

A method for accurately fabricating an integral three-dimensional object from successive layers of a photohardenable liquid composition comprising the steps of: (a) forming a layer of a photohardenable liquid; (b) photohardening at least a portion of the layer of photohardenable liquid by exposure t

A method for accurately fabricating an integral three-dimensional object from successive layers of a photohardenable liquid composition comprising the steps of: (a) forming a layer of a photohardenable liquid; (b) photohardening at least a portion of the layer of photohardenable liquid by exposure to actinic radiation; (c) introducing a new layer of photohardenable liquid onto the layer previously exposed to actinic radiation; and (d) photohardening at least a portion of the new liquid layer by exposure to actinic radiation, with the requirement that the photohardenable composition contains deflecting matter which comprises an ethylenically unsaturated monomer, a photoinitiator, and radiation deflecting matter comprising a polymer having a core formed from monomers comprising (i) a monofunctional ethylenically unsaturated monomer, constituting 5%-97% of the total core by weight; (ii) a multifunctional ethylenically unsaturated monomer or oligomer constituting 2%-70% of the total core by weight; and (iii) an ethylenically unsaturated monomer with a grafting site constituting 1%-25% of the total core by weight, wherein the deflecting matter has a first index of refraction, and the rest of the composition having a second index of refraction, the absolute value of the difference between the first index of refraction and the second index of refraction difference by at least 0.01.