Radiation curable inkjet composition
AssigneeSpectra Group Limited, Inc.
InventorsAlexandre Mejiritski, Oleg V. Grinevich, Dustin B. Martin, Douglas C. Neckers
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Abstract
A radiation-curable inkjet composition for forming 3-D models or images comprising a semi-crystalline or crystalline, low-shrinkage, radiation-curable oligomeric material, a photoinitiator, and a diluent, said inkjet composition having a viscosity of between about 10 to about 50 cps at at least one temperature between 50 to 140° C.
Claims27
A radiation-curable inkjet composition for forming 3-D models or images comprising:
- a semi-crystalline or crystalline, low-shrinkage, radiation-curable oligomeric material;
- a photoinitiator;
- and
- a diluent,
- said inkjet composition having a viscosity of between about 10 to about 50 cps at at least one temperature between about 50 to 140° C.
An inkjet composition useful in building 3D models comprising:
- (a) a semi-crystalline or crystalline oligomer selected from the group consisting of polyester oligomers containing end methacrylyl groups and dimethacrylated urethane oligomers;
- (b) a photoinitiator;
- and
- (c) a diluent selected from the group consisting of monofunctional, difunctional and trifunctional unsaturated ester monomers;
- wherein said inkjet composition has a viscosity between about 10 and 50 cps at at least one temperature between about 125 and about 135° C.
A method of forming at least a portion of a 3D model or image using a radiation-curable, inkjet composition, comprising the steps of:
- a) providing a radiation curable composition comprising:
- i) a semi-crystalline or crystalline, low-shrinkage, radiation curable oligomeric material;
- ii) a photoinitiator;
- and
- iii) a diluent wherein said composition is a solid at room temperature;
- b) heating said composition to a temperature between about 50 to 140° C.;
- c) selectively dispensing said composition at a dispensing temperature from about 50 to about 140° C., said composition being selectively dispensed to correspond to said portion of the 3D model or image;
- and
- d) exposing said selectively dispensed composition to radiation to cure said composition.
Dependencies are inferred from the claim text.