(meth)acrylate-functional radiation curable compositions for additive fabrication
AssigneeStratasys, Inc.
InventorGovindarajan Sudhanva
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Abstract
Described herein are thermoset compositions and kits of compositions suitable for use in additive fabrication processes including specified concentrations of reactive compounds including urethane-(meth)acrylate compounds, monofunctional diluent monomers, and methacrylate-functional compounds having 1.5 polymerizable groups or more. Also described and claimed are methods of creating three-dimensional parts via additive fabrication processes utilizing the compositions elsewhere herein described and claimed, as well as the articles cured therefrom.
Claims15
A radiation curable composition for additive fabrication comprising, relative to the entire weight of the composition:
- from 40 to 95 wt. %, based on the total weight of the composition, of a (i) urethane (meth)acrylate oligomer having at least one polymerizable group,
- wherein the urethane (meth)acrylate oligomer is the reaction product of a diisocyanate, a polyether polyol, and a hydroxy-functional (meth)acrylate;
- from 0 to less than 40 wt. % of (ii) a monofunctional reactive diluent monomer;
- greater than 20 wt. % of (iii) one or more methacrylate-functional compounds comprising a number average of greater than 1.5 polymerizable groups;
- wherein at least one of the polymerizable groups of the compound according to (iii) is (co)polymerizable with the at least one polymerizable group of the oligomer according to (i) and/or (ii);
- and
- wherein the compound according to (iii) possesses a number average molecular weight (Mn) value that is less than the Mn value of the oligomer according to (i) and greater than the Mn of the monomer according to (ii);
- wherein Mn is measured by size exclusion chromatography (SEC) method.
Dependencies are inferred from the claim text.