Increasing the useful range of cationic photoinitiators in stereolithography
AssigneeAlliedSignal Inc.
InventorsEugene V. Sitzmann, Russell F. Anderson, Darryl K. Barnes
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Abstract
Polymer precursor formulations suitable for stereolithography may be prepared from compositions containing vinyl ether functionalized compounds and epoxy functionalized compounds plus an effective amount of a cationic photoinitiator and an ultraviolet light-absorbing compound to provide a predetermined depth of cure. Preferably, the ultraviolet light-absorbing compound is anthracene or its derivatives.
Claims10
In the process of stereolithography in which a three-dimensional object is built up in successive layers by polymerizing cationically polymerizable monomers by the catalytic action of cationic photoinitiators activated by a moving beam of ultraviolet light, the improvement comprising adding ultraviolet light-absorbing compounds to said monomers in quantities sufficient to provide a predetermined depth of cure.
Dependencies are inferred from the claim text.